source/blender/editors/screen/area.c

   1 /*
   2  * ***** BEGIN GPL LICENSE BLOCK *****
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  17  *
  18  * The Original Code is Copyright (C) 2008 Blender Foundation.
  19  * All rights reserved.
  20  *
  21  *
  22  * Contributor(s): Blender Foundation
  23  *
  24  * ***** END GPL LICENSE BLOCK *****
  25  */
  26
  27 /** \file blender/editors/screen/area.c
  28  *  \ingroup edscr
  29  */
  30
  31
  32 #include <string.h>
  33 #include <stdio.h>
  34
  35 #include "MEM_guardedalloc.h"
  36
  37 #include "DNA_userdef_types.h"
  38
  39 #include "BLI_blenlib.h"
  40 #include "BLI_math.h"
  41 #include "BLI_utildefines.h"
  42 #include "BLI_linklist_stack.h"
  43
  44
  45 #include "BKE_context.h"
  46 #include "BKE_global.h"
  47 #include "BKE_screen.h"
  48
  49 #include "RNA_access.h"
  50 #include "RNA_types.h"
  51
  52 #include "WM_api.h"
  53 #include "WM_types.h"
  54 #include "wm_subwindow.h"
  55
  56 #include "ED_screen.h"
  57 #include "ED_screen_types.h"
  58 #include "ED_space_api.h"
  59
  60 #include "BIF_gl.h"
  61 #include "BIF_glutil.h"
  62 #include "BLF_api.h"
  63
  64 #include "IMB_imbuf.h"
  65 #include "IMB_imbuf_types.h"
  66
  67 #include "UI_interface.h"
  68 #include "UI_interface_icons.h"
  69 #include "UI_resources.h"
  70 #include "UI_view2d.h"
  71
  72 #include "screen_intern.h"
  73
  74 extern void ui_draw_anti_tria(float x1, float y1, float x2, float y2, float x3, float y3); /* xxx temp */
  75
  76 /* general area and region code */
  77
  78 static void region_draw_emboss(ARegion *ar, rcti *scirct)
  79 {
  80         rcti rect;
  81
  82         /* translate scissor rect to region space */
  83         rect.xmin = scirct->xmin - ar->winrct.xmin;
  84         rect.ymin = scirct->ymin - ar->winrct.ymin;
  85         rect.xmax = scirct->xmax - ar->winrct.xmin;
  86         rect.ymax = scirct->ymax - ar->winrct.ymin;
  87
  88         /* set transp line */
  89         glEnable(GL_BLEND);
  90         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  91
  92         /* right  */
  93         glColor4ub(0, 0, 0, 30);
  94         sdrawline(rect.xmax, rect.ymin, rect.xmax, rect.ymax);
  95
  96         /* bottom  */
  97         glColor4ub(0, 0, 0, 30);
  98         sdrawline(rect.xmin, rect.ymin, rect.xmax, rect.ymin);
  99
 100         /* top  */
 101         glColor4ub(255, 255, 255, 30);
 102         sdrawline(rect.xmin, rect.ymax, rect.xmax, rect.ymax);
 103
 104         /* left  */
 105         glColor4ub(255, 255, 255, 30);
 106         sdrawline(rect.xmin, rect.ymin, rect.xmin, rect.ymax);
 107
 108         glDisable(GL_BLEND);
 109 }
 110
 111 void ED_region_pixelspace(ARegion *ar)
 112 {
 113         wmOrtho2_region_pixelspace(ar);
 114         glLoadIdentity();
 115 }
 116
 117 /* only exported for WM */
 118 void ED_region_do_listen(bScreen *sc, ScrArea *sa, ARegion *ar, wmNotifier *note)
 119 {
 120         /* generic notes first */
 121         switch (note->category) {
 122                 case NC_WM:
 123                         if (note->data == ND_FILEREAD)
 124                                 ED_region_tag_redraw(ar);
 125                         break;
 126                 case NC_WINDOW:
 127                         ED_region_tag_redraw(ar);
 128                         break;
 129         }
 130
 131         if (ar->type && ar->type->listener)
 132                 ar->type->listener(sc, sa, ar, note);
 133 }
 134
 135 /* only exported for WM */
 136 void ED_area_do_listen(bScreen *sc, ScrArea *sa, wmNotifier *note)
 137 {
 138         /* no generic notes? */
 139         if (sa->type && sa->type->listener) {
 140                 sa->type->listener(sc, sa, note);
 141         }
 142 }
 143
 144 /* only exported for WM */
 145 void ED_area_do_refresh(bContext *C, ScrArea *sa)
 146 {
 147         /* no generic notes? */
 148         if (sa->type && sa->type->refresh) {
 149                 sa->type->refresh(C, sa);
 150         }
 151         sa->do_refresh = false;
 152 }
 153
 154 /**
 155  * \brief Corner widget use for quitting fullscreen.
 156  */
 157 static void area_draw_azone_fullscreen(short x1, short y1, short x2, short y2, float alpha)
 158 {
 159         int x = x2 - ((float) x2 - x1) * 0.5f / UI_DPI_FAC;
 160         int y = y2 - ((float) y2 - y1) * 0.5f / UI_DPI_FAC;
 161
 162         /* adjust the icon distance from the corner */
 163         x += 36.0f / UI_DPI_FAC;
 164         y += 36.0f / UI_DPI_FAC;
 165
 166         /* draws from the left bottom corner of the icon */
 167         x -= UI_DPI_ICON_SIZE;
 168         y -= UI_DPI_ICON_SIZE;
 169
 170         alpha = min_ff(alpha, 0.75f);
 171
 172         UI_icon_draw_aspect(x, y, ICON_FULLSCREEN_EXIT, 0.7f / UI_DPI_FAC, alpha);
 173
 174         /* debug drawing :
 175          * The click_rect is the same as defined in fullscreen_click_rcti_init
 176          * Keep them both in sync */
 177
 178         if (G.debug_value == 1) {
 179                 rcti click_rect;
 180                 float icon_size = UI_DPI_ICON_SIZE + 7 * UI_DPI_FAC;
 181                 char alpha_debug = 255 * alpha;
 182
 183                 BLI_rcti_init(&click_rect, x, x + icon_size, y, y + icon_size);
 184
 185                 glColor4ub(255, 0, 0, alpha_debug);
 186                 fdrawbox(click_rect.xmin, click_rect.ymin, click_rect.xmax, click_rect.ymax);
 187                 glColor4ub(0, 255, 255, alpha_debug);
 188                 fdrawline(click_rect.xmin, click_rect.ymin, click_rect.xmax, click_rect.ymax);
 189                 fdrawline(click_rect.xmin, click_rect.ymax, click_rect.xmax, click_rect.ymin);
 190         }
 191 }
 192
 193 /**
 194  * \brief Corner widgets use for dragging and splitting the view.
 195  */
 196 static void area_draw_azone(short x1, short y1, short x2, short y2)
 197 {
 198         int dx = x2 - x1;
 199         int dy = y2 - y1;
 200
 201         dx = copysign(ceilf(0.3f * abs(dx)), dx);
 202         dy = copysign(ceilf(0.3f * abs(dy)), dy);
 203
 204         glEnable(GL_BLEND);
 205         glEnable(GL_LINE_SMOOTH);
 206
 207         glColor4ub(255, 255, 255, 180);
 208         fdrawline(x1, y2, x2, y1);
 209         glColor4ub(255, 255, 255, 130);
 210         fdrawline(x1, y2 - dy, x2 - dx, y1);
 211         glColor4ub(255, 255, 255, 80);
 212         fdrawline(x1, y2 - 2 * dy, x2 - 2 * dx, y1);
 213
 214         glColor4ub(0, 0, 0, 210);
 215         fdrawline(x1, y2 + 1, x2 + 1, y1);
 216         glColor4ub(0, 0, 0, 180);
 217         fdrawline(x1, y2 - dy + 1, x2 - dx + 1, y1);
 218         glColor4ub(0, 0, 0, 150);
 219         fdrawline(x1, y2 - 2 * dy + 1, x2 - 2 * dx + 1, y1);
 220
 221         glDisable(GL_LINE_SMOOTH);
 222         glDisable(GL_BLEND);
 223 }
 224
 225 static void region_draw_azone_icon(AZone *az)
 226 {
 227         GLUquadricObj *qobj = NULL;
 228         short midx = az->x1 + (az->x2 - az->x1) / 2;
 229         short midy = az->y1 + (az->y2 - az->y1) / 2;
 230
 231         qobj = gluNewQuadric();
 232
 233         glPushMatrix();
 234         glTranslatef(midx, midy, 0.0);
 235
 236         /* outlined circle */
 237         glEnable(GL_LINE_SMOOTH);
 238
 239         glColor4f(1.f, 1.f, 1.f, 0.8f);
 240
 241         gluQuadricDrawStyle(qobj, GLU_FILL);
 242         gluDisk(qobj, 0.0,  4.25f, 16, 1);
 243
 244         glColor4f(0.2f, 0.2f, 0.2f, 0.9f);
 245
 246         gluQuadricDrawStyle(qobj, GLU_SILHOUETTE);
 247         gluDisk(qobj, 0.0,  4.25f, 16, 1);
 248
 249         glDisable(GL_LINE_SMOOTH);
 250
 251         glPopMatrix();
 252         gluDeleteQuadric(qobj);
 253
 254         /* + */
 255         sdrawline(midx, midy - 2, midx, midy + 3);
 256         sdrawline(midx - 2, midy, midx + 3, midy);
 257 }
 258
 259 static void draw_azone_plus(float x1, float y1, float x2, float y2)
 260 {
 261         float width = 0.1f * U.widget_unit;
 262         float pad = 0.2f * U.widget_unit;
 263
 264         glRectf((x1 + x2 - width) * 0.5f, y1 + pad, (x1 + x2 + width) * 0.5f, y2 - pad);
 265         glRectf(x1 + pad, (y1 + y2 - width) * 0.5f, (x1 + x2 - width) * 0.5f, (y1 + y2 + width) * 0.5f);
 266         glRectf((x1 + x2 + width) * 0.5f, (y1 + y2 - width) * 0.5f, x2 - pad, (y1 + y2 + width) * 0.5f);
 267 }
 268
 269 static void region_draw_azone_tab_plus(AZone *az)
 270 {
 271         glEnable(GL_BLEND);
 272
 273         /* add code to draw region hidden as 'too small' */
 274         switch (az->edge) {
 275                 case AE_TOP_TO_BOTTOMRIGHT:
 276                         UI_draw_roundbox_corner_set(UI_CNR_TOP_LEFT | UI_CNR_TOP_RIGHT);
 277                         break;
 278                 case AE_BOTTOM_TO_TOPLEFT:
 279                         UI_draw_roundbox_corner_set(UI_CNR_BOTTOM_RIGHT | UI_CNR_BOTTOM_LEFT);
 280                         break;
 281                 case AE_LEFT_TO_TOPRIGHT:
 282                         UI_draw_roundbox_corner_set(UI_CNR_TOP_LEFT | UI_CNR_BOTTOM_LEFT);
 283                         break;
 284                 case AE_RIGHT_TO_TOPLEFT:
 285                         UI_draw_roundbox_corner_set(UI_CNR_TOP_RIGHT | UI_CNR_BOTTOM_RIGHT);
 286                         break;
 287         }
 288
 289         glColor4f(0.05f, 0.05f, 0.05f, 0.4f);
 290         UI_draw_roundbox((float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f);
 291
 292         glEnable(GL_BLEND);
 293
 294         glColor4f(0.8f, 0.8f, 0.8f, 0.4f);
 295         draw_azone_plus((float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2);
 296
 297         glDisable(GL_BLEND);
 298 }
 299
 300 static void region_draw_azone_tab(AZone *az)
 301 {
 302         float col[3];
 303
 304         glEnable(GL_BLEND);
 305         UI_GetThemeColor3fv(TH_HEADER, col);
 306         glColor4f(col[0], col[1], col[2], 0.5f);
 307
 308         /* add code to draw region hidden as 'too small' */
 309         switch (az->edge) {
 310                 case AE_TOP_TO_BOTTOMRIGHT:
 311                         UI_draw_roundbox_corner_set(UI_CNR_TOP_LEFT | UI_CNR_TOP_RIGHT | UI_RB_ALPHA);
 312
 313                         UI_draw_roundbox_shade_x(GL_POLYGON, (float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f, -0.3f, 0.05f);
 314                         glColor4ub(0, 0, 0, 255);
 315                         UI_draw_roundbox_unfilled((float)az->x1, 0.3f + (float)az->y1, (float)az->x2, 0.3f + (float)az->y2, 4.0f);
 316                         break;
 317                 case AE_BOTTOM_TO_TOPLEFT:
 318                         UI_draw_roundbox_corner_set(UI_CNR_BOTTOM_RIGHT | UI_CNR_BOTTOM_LEFT | UI_RB_ALPHA);
 319
 320                         UI_draw_roundbox_shade_x(GL_POLYGON, (float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f, -0.3f, 0.05f);
 321                         glColor4ub(0, 0, 0, 255);
 322                         UI_draw_roundbox_unfilled((float)az->x1, 0.3f + (float)az->y1, (float)az->x2, 0.3f + (float)az->y2, 4.0f);
 323                         break;
 324                 case AE_LEFT_TO_TOPRIGHT:
 325                         UI_draw_roundbox_corner_set(UI_CNR_TOP_LEFT | UI_CNR_BOTTOM_LEFT | UI_RB_ALPHA);
 326
 327                         UI_draw_roundbox_shade_x(GL_POLYGON, (float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f, -0.3f, 0.05f);
 328                         glColor4ub(0, 0, 0, 255);
 329                         UI_draw_roundbox_unfilled((float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f);
 330                         break;
 331                 case AE_RIGHT_TO_TOPLEFT:
 332                         UI_draw_roundbox_corner_set(UI_CNR_TOP_RIGHT | UI_CNR_BOTTOM_RIGHT | UI_RB_ALPHA);
 333
 334                         UI_draw_roundbox_shade_x(GL_POLYGON, (float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f, -0.3f, 0.05f);
 335                         glColor4ub(0, 0, 0, 255);
 336                         UI_draw_roundbox_unfilled((float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f);
 337                         break;
 338         }
 339
 340         glDisable(GL_BLEND);
 341 }
 342
 343 static void region_draw_azone_tria(AZone *az)
 344 {
 345         glEnable(GL_BLEND);
 346         //UI_GetThemeColor3fv(TH_HEADER, col);
 347         glColor4f(0.0f, 0.0f, 0.0f, 0.35f);
 348
 349         /* add code to draw region hidden as 'too small' */
 350         switch (az->edge) {
 351                 case AE_TOP_TO_BOTTOMRIGHT:
 352                         ui_draw_anti_tria((float)az->x1, (float)az->y1, (float)az->x2, (float)az->y1, (float)(az->x1 + az->x2) / 2, (float)az->y2);
 353                         break;
 354
 355                 case AE_BOTTOM_TO_TOPLEFT:
 356                         ui_draw_anti_tria((float)az->x1, (float)az->y2, (float)az->x2, (float)az->y2, (float)(az->x1 + az->x2) / 2, (float)az->y1);
 357                         break;
 358
 359                 case AE_LEFT_TO_TOPRIGHT:
 360                         ui_draw_anti_tria((float)az->x2, (float)az->y1, (float)az->x2, (float)az->y2, (float)az->x1, (float)(az->y1 + az->y2) / 2);
 361                         break;
 362
 363                 case AE_RIGHT_TO_TOPLEFT:
 364                         ui_draw_anti_tria((float)az->x1, (float)az->y1, (float)az->x1, (float)az->y2, (float)az->x2, (float)(az->y1 + az->y2) / 2);
 365                         break;
 366
 367         }
 368
 369         glDisable(GL_BLEND);
 370 }
 371
 372 static void region_draw_azones(ScrArea *sa, ARegion *ar)
 373 {
 374         AZone *az;
 375
 376         if (!sa)
 377                 return;
 378
 379         glEnable(GL_BLEND);
 380         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 381
 382         glPushMatrix();
 383         glTranslatef(-ar->winrct.xmin, -ar->winrct.ymin, 0.0f);
 384
 385         for (az = sa->actionzones.first; az; az = az->next) {
 386                 /* test if action zone is over this region */
 387                 rcti azrct;
 388                 BLI_rcti_init(&azrct, az->x1, az->x2, az->y1, az->y2);
 389
 390                 if (BLI_rcti_isect(&ar->drawrct, &azrct, NULL)) {
 391                         if (az->type == AZONE_AREA) {
 392                                 area_draw_azone(az->x1, az->y1, az->x2, az->y2);
 393                         }
 394                         else if (az->type == AZONE_REGION) {
 395
 396                                 if (az->ar) {
 397                                         /* only display tab or icons when the region is hidden */
 398                                         if (az->ar->flag & (RGN_FLAG_HIDDEN | RGN_FLAG_TOO_SMALL)) {
 399                                                 if (G.debug_value == 3)
 400                                                         region_draw_azone_icon(az);
 401                                                 else if (G.debug_value == 2)
 402                                                         region_draw_azone_tria(az);
 403                                                 else if (G.debug_value == 1)
 404                                                         region_draw_azone_tab(az);
 405                                                 else
 406                                                         region_draw_azone_tab_plus(az);
 407                                         }
 408                                 }
 409                         }
 410                         else if (az->type == AZONE_FULLSCREEN) {
 411                                 area_draw_azone_fullscreen(az->x1, az->y1, az->x2, az->y2, az->alpha);
 412                         }
 413                 }
 414         }
 415
 416         glPopMatrix();
 417
 418         glDisable(GL_BLEND);
 419 }
 420
 421 /* only exported for WM */
 422 /* makes region ready for drawing, sets pixelspace */
 423 void ED_region_set(const bContext *C, ARegion *ar)
 424 {
 425         wmWindow *win = CTX_wm_window(C);
 426         ScrArea *sa = CTX_wm_area(C);
 427
 428         ar->drawrct = ar->winrct;
 429
 430         /* note; this sets state, so we can use wmOrtho and friends */
 431         wmSubWindowScissorSet(win, ar->swinid, &ar->drawrct, true);
 432
 433         UI_SetTheme(sa ? sa->spacetype : 0, ar->type ? ar->type->regionid : 0);
 434
 435         ED_region_pixelspace(ar);
 436 }
 437
 438
 439 /* only exported for WM */
 440 void ED_region_do_draw(bContext *C, ARegion *ar)
 441 {
 442         wmWindow *win = CTX_wm_window(C);
 443         ScrArea *sa = CTX_wm_area(C);
 444         ARegionType *at = ar->type;
 445         bool scissor_pad;
 446
 447         /* see BKE_spacedata_draw_locks() */
 448         if (at->do_lock)
 449                 return;
 450
 451         /* if no partial draw rect set, full rect */
 452         if (ar->drawrct.xmin == ar->drawrct.xmax) {
 453                 ar->drawrct = ar->winrct;
 454                 scissor_pad = true;
 455         }
 456         else {
 457                 /* extra clip for safety */
 458                 BLI_rcti_isect(&ar->winrct, &ar->drawrct, &ar->drawrct);
 459                 scissor_pad = false;
 460         }
 461
 462         ar->do_draw |= RGN_DRAWING;
 463
 464         /* note; this sets state, so we can use wmOrtho and friends */
 465         wmSubWindowScissorSet(win, ar->swinid, &ar->drawrct, scissor_pad);
 466
 467         wmOrtho2_region_ui(ar);
 468
 469         UI_SetTheme(sa ? sa->spacetype : 0, at->regionid);
 470
 471         /* optional header info instead? */
 472         if (ar->headerstr) {
 473                 UI_ThemeClearColor(TH_HEADER);
 474                 glClear(GL_COLOR_BUFFER_BIT);
 475
 476                 UI_ThemeColor(TH_TEXT);
 477                 BLF_draw_default(UI_UNIT_X, 0.4f * UI_UNIT_Y, 0.0f, ar->headerstr, BLF_DRAW_STR_DUMMY_MAX);
 478         }
 479         else if (at->draw) {
 480                 at->draw(C, ar);
 481         }
 482
 483         /* XXX test: add convention to end regions always in pixel space, for drawing of borders/gestures etc */
 484         ED_region_pixelspace(ar);
 485
 486         ED_region_draw_cb_draw(C, ar, REGION_DRAW_POST_PIXEL);
 487
 488         region_draw_azones(sa, ar);
 489
 490         /* for debugging unneeded area redraws and partial redraw */
 491 #if 0
 492         glEnable(GL_BLEND);
 493         glColor4f(drand48(), drand48(), drand48(), 0.1f);
 494         glRectf(ar->drawrct.xmin - ar->winrct.xmin, ar->drawrct.ymin - ar->winrct.ymin,
 495                 ar->drawrct.xmax - ar->winrct.xmin, ar->drawrct.ymax - ar->winrct.ymin);
 496         glDisable(GL_BLEND);
 497 #endif
 498
 499         memset(&ar->drawrct, 0, sizeof(ar->drawrct));
 500
 501         UI_blocklist_free_inactive(C, &ar->uiblocks);
 502
 503         if (sa && (win->screen->state != SCREENFULL)) {
 504                 region_draw_emboss(ar, &ar->winrct);
 505         }
 506 }
 507
 508 /* **********************************
 509  * maybe silly, but let's try for now
 510  * to keep these tags protected
 511  * ********************************** */
 512
 513 void ED_region_tag_redraw(ARegion *ar)
 514 {
 515         /* don't tag redraw while drawing, it shouldn't happen normally
 516          * but python scripts can cause this to happen indirectly */
 517         if (ar && !(ar->do_draw & RGN_DRAWING)) {
 518                 /* zero region means full region redraw */
 519                 ar->do_draw &= ~RGN_DRAW_PARTIAL;
 520                 ar->do_draw |= RGN_DRAW;
 521                 memset(&ar->drawrct, 0, sizeof(ar->drawrct));
 522         }
 523 }
 524
 525 void ED_region_tag_redraw_overlay(ARegion *ar)
 526 {
 527         if (ar)
 528                 ar->do_draw_overlay = RGN_DRAW;
 529 }
 530
 531 void ED_region_tag_refresh_ui(ARegion *ar)
 532 {
 533         if (ar) {
 534                 ar->do_draw |= RGN_DRAW_REFRESH_UI;
 535         }
 536 }
 537
 538 void ED_region_tag_redraw_partial(ARegion *ar, rcti *rct)
 539 {
 540         if (ar && !(ar->do_draw & RGN_DRAWING)) {
 541                 if (!(ar->do_draw & RGN_DRAW)) {
 542                         /* no redraw set yet, set partial region */
 543                         ar->do_draw |= RGN_DRAW_PARTIAL;
 544                         ar->drawrct = *rct;
 545                 }
 546                 else if (ar->drawrct.xmin != ar->drawrct.xmax) {
 547                         /* partial redraw already set, expand region */
 548                         BLI_rcti_union(&ar->drawrct, rct);
 549                 }
 550         }
 551 }
 552
 553 void ED_area_tag_redraw(ScrArea *sa)
 554 {
 555         ARegion *ar;
 556
 557         if (sa)
 558                 for (ar = sa->regionbase.first; ar; ar = ar->next)
 559                         ED_region_tag_redraw(ar);
 560 }
 561
 562 void ED_area_tag_redraw_regiontype(ScrArea *sa, int regiontype)
 563 {
 564         ARegion *ar;
 565
 566         if (sa) {
 567                 for (ar = sa->regionbase.first; ar; ar = ar->next) {
 568                         if (ar->regiontype == regiontype) {
 569                                 ED_region_tag_redraw(ar);
 570                         }
 571                 }
 572         }
 573 }
 574
 575 void ED_area_tag_refresh(ScrArea *sa)
 576 {
 577         if (sa)
 578                 sa->do_refresh = true;
 579 }
 580
 581 /* *************************************************************** */
 582
 583 /* use NULL to disable it */
 584 void ED_area_headerprint(ScrArea *sa, const char *str)
 585 {
 586         ARegion *ar;
 587
 588         /* happens when running transform operators in backround mode */
 589         if (sa == NULL)
 590                 return;
 591
 592         for (ar = sa->regionbase.first; ar; ar = ar->next) {
 593                 if (ar->regiontype == RGN_TYPE_HEADER) {
 594                         if (str) {
 595                                 if (ar->headerstr == NULL)
 596                                         ar->headerstr = MEM_mallocN(256, "headerprint");
 597                                 BLI_strncpy(ar->headerstr, str, 256);
 598                         }
 599                         else if (ar->headerstr) {
 600                                 MEM_freeN(ar->headerstr);
 601                                 ar->headerstr = NULL;
 602                         }
 603                         ED_region_tag_redraw(ar);
 604                 }
 605         }
 606 }
 607
 608 /* ************************************************************ */
 609
 610
 611 static void area_azone_initialize(wmWindow *win, bScreen *screen, ScrArea *sa)
 612 {
 613         AZone *az;
 614
 615         /* reinitalize entirely, regions and fullscreen add azones too */
 616         BLI_freelistN(&sa->actionzones);
 617
 618         if (screen->state != SCREENNORMAL) {
 619                 return;
 620         }
 621
 622         /* can't click on bottom corners on OS X, already used for resizing */
 623 #ifdef __APPLE__
 624         if (!(sa->totrct.xmin == 0 && sa->totrct.ymin == 0) || WM_window_is_fullscreen(win))
 625 #else
 626         (void)win;
 627 #endif
 628         {
 629                 /* set area action zones */
 630                 az = (AZone *)MEM_callocN(sizeof(AZone), "actionzone");
 631                 BLI_addtail(&(sa->actionzones), az);
 632                 az->type = AZONE_AREA;
 633                 az->x1 = sa->totrct.xmin;
 634                 az->y1 = sa->totrct.ymin;
 635                 az->x2 = sa->totrct.xmin + (AZONESPOT - 1);
 636                 az->y2 = sa->totrct.ymin + (AZONESPOT - 1);
 637                 BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
 638         }
 639
 640         az = (AZone *)MEM_callocN(sizeof(AZone), "actionzone");
 641         BLI_addtail(&(sa->actionzones), az);
 642         az->type = AZONE_AREA;
 643         az->x1 = sa->totrct.xmax;
 644         az->y1 = sa->totrct.ymax;
 645         az->x2 = sa->totrct.xmax - (AZONESPOT - 1);
 646         az->y2 = sa->totrct.ymax - (AZONESPOT - 1);
 647         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
 648 }
 649
 650 static void fullscreen_azone_initialize(ScrArea *sa, ARegion *ar)
 651 {
 652         AZone *az;
 653
 654         if (ar->regiontype != RGN_TYPE_WINDOW)
 655                 return;
 656
 657         az = (AZone *)MEM_callocN(sizeof(AZone), "fullscreen action zone");
 658         BLI_addtail(&(sa->actionzones), az);
 659         az->type = AZONE_FULLSCREEN;
 660         az->ar = ar;
 661         az->alpha = 0.0f;
 662
 663         az->x1 = ar->winrct.xmax - (AZONEFADEOUT - 1);
 664         az->y1 = ar->winrct.ymax - (AZONEFADEOUT - 1);
 665         az->x2 = ar->winrct.xmax;
 666         az->y2 = ar->winrct.ymax;
 667         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
 668 }
 669
 670 #define AZONEPAD_EDGE   (0.1f * U.widget_unit)
 671 #define AZONEPAD_ICON   (0.45f * U.widget_unit)
 672 static void region_azone_edge(AZone *az, ARegion *ar)
 673 {
 674         switch (az->edge) {
 675                 case AE_TOP_TO_BOTTOMRIGHT:
 676                         az->x1 = ar->winrct.xmin;
 677                         az->y1 = ar->winrct.ymax - AZONEPAD_EDGE;
 678                         az->x2 = ar->winrct.xmax;
 679                         az->y2 = ar->winrct.ymax + AZONEPAD_EDGE;
 680                         break;
 681                 case AE_BOTTOM_TO_TOPLEFT:
 682                         az->x1 = ar->winrct.xmin;
 683                         az->y1 = ar->winrct.ymin + AZONEPAD_EDGE;
 684                         az->x2 = ar->winrct.xmax;
 685                         az->y2 = ar->winrct.ymin - AZONEPAD_EDGE;
 686                         break;
 687                 case AE_LEFT_TO_TOPRIGHT:
 688                         az->x1 = ar->winrct.xmin - AZONEPAD_EDGE;
 689                         az->y1 = ar->winrct.ymin;
 690                         az->x2 = ar->winrct.xmin + AZONEPAD_EDGE;
 691                         az->y2 = ar->winrct.ymax;
 692                         break;
 693                 case AE_RIGHT_TO_TOPLEFT:
 694                         az->x1 = ar->winrct.xmax + AZONEPAD_EDGE;
 695                         az->y1 = ar->winrct.ymin;
 696                         az->x2 = ar->winrct.xmax - AZONEPAD_EDGE;
 697                         az->y2 = ar->winrct.ymax;
 698                         break;
 699         }
 700
 701         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
 702 }
 703
 704 static void region_azone_icon(ScrArea *sa, AZone *az, ARegion *ar)
 705 {
 706         AZone *azt;
 707         int tot = 0;
 708
 709         /* count how many actionzones with along same edge are available.
 710          * This allows for adding more action zones in the future without
 711          * having to worry about correct offset */
 712         for (azt = sa->actionzones.first; azt; azt = azt->next) {
 713                 if (azt->edge == az->edge) tot++;
 714         }
 715
 716         switch (az->edge) {
 717                 case AE_TOP_TO_BOTTOMRIGHT:
 718                         az->x1 = ar->winrct.xmax - tot * 2 * AZONEPAD_ICON;
 719                         az->y1 = ar->winrct.ymax + AZONEPAD_ICON;
 720                         az->x2 = ar->winrct.xmax - tot * AZONEPAD_ICON;
 721                         az->y2 = ar->winrct.ymax + 2 * AZONEPAD_ICON;
 722                         break;
 723                 case AE_BOTTOM_TO_TOPLEFT:
 724                         az->x1 = ar->winrct.xmin + AZONEPAD_ICON;
 725                         az->y1 = ar->winrct.ymin - 2 * AZONEPAD_ICON;
 726                         az->x2 = ar->winrct.xmin + 2 * AZONEPAD_ICON;
 727                         az->y2 = ar->winrct.ymin - AZONEPAD_ICON;
 728                         break;
 729                 case AE_LEFT_TO_TOPRIGHT:
 730                         az->x1 = ar->winrct.xmin - 2 * AZONEPAD_ICON;
 731                         az->y1 = ar->winrct.ymax - tot * 2 * AZONEPAD_ICON;
 732                         az->x2 = ar->winrct.xmin - AZONEPAD_ICON;
 733                         az->y2 = ar->winrct.ymax - tot * AZONEPAD_ICON;
 734                         break;
 735                 case AE_RIGHT_TO_TOPLEFT:
 736                         az->x1 = ar->winrct.xmax + AZONEPAD_ICON;
 737                         az->y1 = ar->winrct.ymax - tot * 2 * AZONEPAD_ICON;
 738                         az->x2 = ar->winrct.xmax + 2 * AZONEPAD_ICON;
 739                         az->y2 = ar->winrct.ymax - tot * AZONEPAD_ICON;
 740                         break;
 741         }
 742
 743         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
 744
 745         /* if more azones on 1 spot, set offset */
 746         for (azt = sa->actionzones.first; azt; azt = azt->next) {
 747                 if (az != azt) {
 748                         if (ABS(az->x1 - azt->x1) < 2 && ABS(az->y1 - azt->y1) < 2) {
 749                                 if (az->edge == AE_TOP_TO_BOTTOMRIGHT || az->edge == AE_BOTTOM_TO_TOPLEFT) {
 750                                         az->x1 += AZONESPOT;
 751                                         az->x2 += AZONESPOT;
 752                                 }
 753                                 else {
 754                                         az->y1 -= AZONESPOT;
 755                                         az->y2 -= AZONESPOT;
 756                                 }
 757                                 BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
 758                         }
 759                 }
 760         }
 761 }
 762
 763 #define AZONEPAD_TAB_PLUSW  (0.7f * U.widget_unit)
 764 #define AZONEPAD_TAB_PLUSH  (0.7f * U.widget_unit)
 765
 766 /* region already made zero sized, in shape of edge */
 767 static void region_azone_tab_plus(ScrArea *sa, AZone *az, ARegion *ar)
 768 {
 769         AZone *azt;
 770         int tot = 0, add;
 771
 772         for (azt = sa->actionzones.first; azt; azt = azt->next) {
 773                 if (azt->edge == az->edge) tot++;
 774         }
 775
 776         switch (az->edge) {
 777                 case AE_TOP_TO_BOTTOMRIGHT:
 778                         add = (ar->winrct.ymax == sa->totrct.ymin) ? 1 : 0;
 779                         az->x1 = ar->winrct.xmax - 2.5f * AZONEPAD_TAB_PLUSW;
 780                         az->y1 = ar->winrct.ymax - add;
 781                         az->x2 = ar->winrct.xmax - 1.5f * AZONEPAD_TAB_PLUSW;
 782                         az->y2 = ar->winrct.ymax - add + AZONEPAD_TAB_PLUSH;
 783                         break;
 784                 case AE_BOTTOM_TO_TOPLEFT:
 785                         az->x1 = ar->winrct.xmax - 2.5f * AZONEPAD_TAB_PLUSW;
 786                         az->y1 = ar->winrct.ymin - AZONEPAD_TAB_PLUSH;
 787                         az->x2 = ar->winrct.xmax - 1.5f * AZONEPAD_TAB_PLUSW;
 788                         az->y2 = ar->winrct.ymin;
 789                         break;
 790                 case AE_LEFT_TO_TOPRIGHT:
 791                         az->x1 = ar->winrct.xmin - AZONEPAD_TAB_PLUSH;
 792                         az->y1 = ar->winrct.ymax - 2.5f * AZONEPAD_TAB_PLUSW;
 793                         az->x2 = ar->winrct.xmin;
 794                         az->y2 = ar->winrct.ymax - 1.5f * AZONEPAD_TAB_PLUSW;
 795                         break;
 796                 case AE_RIGHT_TO_TOPLEFT:
 797                         az->x1 = ar->winrct.xmax - 1;
 798                         az->y1 = ar->winrct.ymax - 2.5f * AZONEPAD_TAB_PLUSW;
 799                         az->x2 = ar->winrct.xmax - 1 + AZONEPAD_TAB_PLUSH;
 800                         az->y2 = ar->winrct.ymax - 1.5f * AZONEPAD_TAB_PLUSW;
 801                         break;
 802         }
 803         /* rect needed for mouse pointer test */
 804         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
 805 }
 806
 807
 808 #define AZONEPAD_TABW   (0.9f * U.widget_unit)
 809 #define AZONEPAD_TABH   (0.35f * U.widget_unit)
 810
 811 /* region already made zero sized, in shape of edge */
 812 static void region_azone_tab(ScrArea *sa, AZone *az, ARegion *ar)
 813 {
 814         AZone *azt;
 815         int tot = 0, add;
 816
 817         for (azt = sa->actionzones.first; azt; azt = azt->next) {
 818                 if (azt->edge == az->edge) tot++;
 819         }
 820
 821         switch (az->edge) {
 822                 case AE_TOP_TO_BOTTOMRIGHT:
 823                         add = (ar->winrct.ymax == sa->totrct.ymin) ? 1 : 0;
 824                         az->x1 = ar->winrct.xmax - 2 * AZONEPAD_TABW;
 825                         az->y1 = ar->winrct.ymax - add;
 826                         az->x2 = ar->winrct.xmax - AZONEPAD_TABW;
 827                         az->y2 = ar->winrct.ymax - add + AZONEPAD_TABH;
 828                         break;
 829                 case AE_BOTTOM_TO_TOPLEFT:
 830                         az->x1 = ar->winrct.xmin + AZONEPAD_TABW;
 831                         az->y1 = ar->winrct.ymin - AZONEPAD_TABH;
 832                         az->x2 = ar->winrct.xmin + 2 * AZONEPAD_TABW;
 833                         az->y2 = ar->winrct.ymin;
 834                         break;
 835                 case AE_LEFT_TO_TOPRIGHT:
 836                         az->x1 = ar->winrct.xmin + 1 - AZONEPAD_TABH;
 837                         az->y1 = ar->winrct.ymax - 2 * AZONEPAD_TABW;
 838                         az->x2 = ar->winrct.xmin + 1;
 839                         az->y2 = ar->winrct.ymax - AZONEPAD_TABW;
 840                         break;
 841                 case AE_RIGHT_TO_TOPLEFT:
 842                         az->x1 = ar->winrct.xmax - 1;
 843                         az->y1 = ar->winrct.ymax - 2 * AZONEPAD_TABW;
 844                         az->x2 = ar->winrct.xmax - 1 + AZONEPAD_TABH;
 845                         az->y2 = ar->winrct.ymax - AZONEPAD_TABW;
 846                         break;
 847         }
 848         /* rect needed for mouse pointer test */
 849         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
 850 }
 851
 852 #define AZONEPAD_TRIAW  (0.8f * U.widget_unit)
 853 #define AZONEPAD_TRIAH  (0.45f * U.widget_unit)
 854
 855
 856 /* region already made zero sized, in shape of edge */
 857 static void region_azone_tria(ScrArea *sa, AZone *az, ARegion *ar)
 858 {
 859         AZone *azt;
 860         int tot = 0, add;
 861
 862         for (azt = sa->actionzones.first; azt; azt = azt->next) {
 863                 if (azt->edge == az->edge) tot++;
 864         }
 865
 866         switch (az->edge) {
 867                 case AE_TOP_TO_BOTTOMRIGHT:
 868                         add = (ar->winrct.ymax == sa->totrct.ymin) ? 1 : 0;
 869                         az->x1 = ar->winrct.xmax - 2 * AZONEPAD_TRIAW;
 870                         az->y1 = ar->winrct.ymax - add;
 871                         az->x2 = ar->winrct.xmax - AZONEPAD_TRIAW;
 872                         az->y2 = ar->winrct.ymax - add + AZONEPAD_TRIAH;
 873                         break;
 874                 case AE_BOTTOM_TO_TOPLEFT:
 875                         az->x1 = ar->winrct.xmin + AZONEPAD_TRIAW;
 876                         az->y1 = ar->winrct.ymin - AZONEPAD_TRIAH;
 877                         az->x2 = ar->winrct.xmin + 2 * AZONEPAD_TRIAW;
 878                         az->y2 = ar->winrct.ymin;
 879                         break;
 880                 case AE_LEFT_TO_TOPRIGHT:
 881                         az->x1 = ar->winrct.xmin + 1 - AZONEPAD_TRIAH;
 882                         az->y1 = ar->winrct.ymax - 2 * AZONEPAD_TRIAW;
 883                         az->x2 = ar->winrct.xmin + 1;
 884                         az->y2 = ar->winrct.ymax - AZONEPAD_TRIAW;
 885                         break;
 886                 case AE_RIGHT_TO_TOPLEFT:
 887                         az->x1 = ar->winrct.xmax - 1;
 888                         az->y1 = ar->winrct.ymax - 2 * AZONEPAD_TRIAW;
 889                         az->x2 = ar->winrct.xmax - 1 + AZONEPAD_TRIAH;
 890                         az->y2 = ar->winrct.ymax - AZONEPAD_TRIAW;
 891                         break;
 892         }
 893         /* rect needed for mouse pointer test */
 894         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
 895 }
 896
 897
 898 static void region_azone_initialize(ScrArea *sa, ARegion *ar, AZEdge edge, const bool is_fullscreen)
 899 {
 900         AZone *az = NULL;
 901         const bool is_hidden = (ar->flag & (RGN_FLAG_HIDDEN | RGN_FLAG_TOO_SMALL)) == 0;
 902
 903         if (is_hidden || !is_fullscreen) {
 904                 az = (AZone *)MEM_callocN(sizeof(AZone), "actionzone");
 905                 BLI_addtail(&(sa->actionzones), az);
 906                 az->type = AZONE_REGION;
 907                 az->ar = ar;
 908                 az->edge = edge;
 909         }
 910
 911         if (!is_hidden) {
 912                 if (!is_fullscreen) {
 913                         if (G.debug_value == 3)
 914                                 region_azone_icon(sa, az, ar);
 915                         else if (G.debug_value == 2)
 916                                 region_azone_tria(sa, az, ar);
 917                         else if (G.debug_value == 1)
 918                                 region_azone_tab(sa, az, ar);
 919                         else
 920                                 region_azone_tab_plus(sa, az, ar);
 921                 }
 922         }
 923         else {
 924                 region_azone_edge(az, ar);
 925         }
 926
 927 }
 928
 929
 930 /* *************************************************************** */
 931
 932 static void region_azone_add(ScrArea *sa, ARegion *ar, const int alignment, const bool is_fullscreen)
 933 {
 934         /* edge code (t b l r) is along which area edge azone will be drawn */
 935
 936         if (alignment == RGN_ALIGN_TOP)
 937                 region_azone_initialize(sa, ar, AE_BOTTOM_TO_TOPLEFT, is_fullscreen);
 938         else if (alignment == RGN_ALIGN_BOTTOM)
 939                 region_azone_initialize(sa, ar, AE_TOP_TO_BOTTOMRIGHT, is_fullscreen);
 940         else if (alignment == RGN_ALIGN_RIGHT)
 941                 region_azone_initialize(sa, ar, AE_LEFT_TO_TOPRIGHT, is_fullscreen);
 942         else if (alignment == RGN_ALIGN_LEFT)
 943                 region_azone_initialize(sa, ar, AE_RIGHT_TO_TOPLEFT, is_fullscreen);
 944 }
 945
 946 /* dir is direction to check, not the splitting edge direction! */
 947 static int rct_fits(rcti *rect, char dir, int size)
 948 {
 949         if (dir == 'h') {
 950                 return BLI_rcti_size_x(rect) + 1 - size;
 951         }
 952         else {  /* 'v' */
 953                 return BLI_rcti_size_y(rect) + 1 - size;
 954         }
 955 }
 956
 957 /* *************************************************************** */
 958
 959 /* ar should be overlapping */
 960 /* function checks if some overlapping region was defined before - on same place */
 961 static void region_overlap_fix(ScrArea *sa, ARegion *ar)
 962 {
 963         ARegion *ar1;
 964         const int align = ar->alignment & ~RGN_SPLIT_PREV;
 965         int align1 = 0;
 966
 967         /* find overlapping previous region on same place */
 968         for (ar1 = ar->prev; ar1; ar1 = ar1->prev) {
 969                 if (ar1->overlap && ((ar1->alignment & RGN_SPLIT_PREV) == 0)) {
 970                         align1 = ar1->alignment;
 971                         if (BLI_rcti_isect(&ar1->winrct, &ar->winrct, NULL)) {
 972                                 if (align1 != align) {
 973                                         /* Left overlapping right or vice-versa, forbid this! */
 974                                         ar->flag |= RGN_FLAG_TOO_SMALL;
 975                                         return;
 976                                 }
 977                                 /* Else, we have our previous region on same side. */
 978                                 break;
 979                         }
 980                 }
 981         }
 982
 983         /* translate or close */
 984         if (ar1) {
 985                 if (align1 == RGN_ALIGN_LEFT) {
 986                         if (ar->winrct.xmax + ar1->winx > sa->winx - U.widget_unit) {
 987                                 ar->flag |= RGN_FLAG_TOO_SMALL;
 988                                 return;
 989                         }
 990                         else {
 991                                 BLI_rcti_translate(&ar->winrct, ar1->winx, 0);
 992                         }
 993                 }
 994                 else if (align1 == RGN_ALIGN_RIGHT) {
 995                         if (ar->winrct.xmin - ar1->winx < U.widget_unit) {
 996                                 ar->flag |= RGN_FLAG_TOO_SMALL;
 997                                 return;
 998                         }
 999                         else {
1000                                 BLI_rcti_translate(&ar->winrct, -ar1->winx, 0);
1001                         }
1002                 }
1003         }
1004
1005         /* At this point, 'ar' is in its final position and still open.
1006          * Make a final check it does not overlap any previous 'other side' region. */
1007         for (ar1 = ar->prev; ar1; ar1 = ar1->prev) {
1008                 if (ar1->overlap && (ar1->alignment & RGN_SPLIT_PREV) == 0) {
1009                         if ((ar1->alignment != align) && BLI_rcti_isect(&ar1->winrct, &ar->winrct, NULL)) {
1010                                 /* Left overlapping right or vice-versa, forbid this! */
1011                                 ar->flag |= RGN_FLAG_TOO_SMALL;
1012                                 return;
1013                         }
1014                 }
1015         }
1016 }
1017
1018 /* overlapping regions only in the following restricted cases */
1019 static bool region_is_overlap(wmWindow *win, ScrArea *sa, ARegion *ar)
1020 {
1021         if (U.uiflag2 & USER_REGION_OVERLAP) {
1022                 if (WM_is_draw_triple(win)) {
1023                         if (ELEM(sa->spacetype, SPACE_VIEW3D, SPACE_SEQ)) {
1024                                 if (ELEM(ar->regiontype, RGN_TYPE_TOOLS, RGN_TYPE_UI, RGN_TYPE_TOOL_PROPS))
1025                                         return 1;
1026                         }
1027                         else if (sa->spacetype == SPACE_IMAGE) {
1028                                 if (ELEM(ar->regiontype, RGN_TYPE_TOOLS, RGN_TYPE_UI, RGN_TYPE_TOOL_PROPS, RGN_TYPE_PREVIEW))
1029                                         return 1;
1030                         }
1031                 }
1032         }
1033
1034         return 0;
1035 }
1036
1037 static void region_rect_recursive(wmWindow *win, ScrArea *sa, ARegion *ar, rcti *remainder, int quad)
1038 {
1039         rcti *remainder_prev = remainder;
1040         int prefsizex, prefsizey;
1041         int alignment;
1042
1043         if (ar == NULL)
1044                 return;
1045
1046         /* no returns in function, winrct gets set in the end again */
1047         BLI_rcti_init(&ar->winrct, 0, 0, 0, 0);
1048
1049         /* for test; allow split of previously defined region */
1050         if (ar->alignment & RGN_SPLIT_PREV)
1051                 if (ar->prev)
1052                         remainder = &ar->prev->winrct;
1053
1054         alignment = ar->alignment & ~RGN_SPLIT_PREV;
1055
1056         /* set here, assuming userpref switching forces to call this again */
1057         ar->overlap = region_is_overlap(win, sa, ar);
1058
1059         /* clear state flags first */
1060         ar->flag &= ~RGN_FLAG_TOO_SMALL;
1061         /* user errors */
1062         if (ar->next == NULL && alignment != RGN_ALIGN_QSPLIT)
1063                 alignment = RGN_ALIGN_NONE;
1064
1065         /* prefsize, for header we stick to exception (prevent dpi rounding error) */
1066         prefsizex = UI_DPI_FAC * (ar->sizex > 1 ? ar->sizex + 0.5f : ar->type->prefsizex);
1067
1068         if (ar->regiontype == RGN_TYPE_HEADER) {
1069                 prefsizey = ED_area_headersize();
1070         }
1071         else if (ar->regiontype == RGN_TYPE_UI && sa->spacetype == SPACE_FILE) {
1072                 prefsizey = UI_UNIT_Y * 2 + (UI_UNIT_Y / 2);
1073         }
1074         else {
1075                 prefsizey = UI_DPI_FAC * (ar->sizey > 1 ? ar->sizey + 0.5f : ar->type->prefsizey);
1076         }
1077
1078
1079         if (ar->flag & RGN_FLAG_HIDDEN) {
1080                 /* hidden is user flag */
1081         }
1082         else if (alignment == RGN_ALIGN_FLOAT) {
1083                 /* XXX floating area region, not handled yet here */
1084         }
1085         else if (rct_fits(remainder, 'v', 1) < 0 || rct_fits(remainder, 'h', 1) < 0) {
1086                 /* remainder is too small for any usage */
1087                 ar->flag |= RGN_FLAG_TOO_SMALL;
1088         }
1089         else if (alignment == RGN_ALIGN_NONE) {
1090                 /* typically last region */
1091                 ar->winrct = *remainder;
1092                 BLI_rcti_init(remainder, 0, 0, 0, 0);
1093         }
1094         else if (alignment == RGN_ALIGN_TOP || alignment == RGN_ALIGN_BOTTOM) {
1095
1096                 if (rct_fits(remainder, 'v', prefsizey) < 0) {
1097                         ar->flag |= RGN_FLAG_TOO_SMALL;
1098                 }
1099                 else {
1100                         int fac = rct_fits(remainder, 'v', prefsizey);
1101
1102                         if (fac < 0)
1103                                 prefsizey += fac;
1104
1105                         ar->winrct = *remainder;
1106
1107                         if (alignment == RGN_ALIGN_TOP) {
1108                                 ar->winrct.ymin = ar->winrct.ymax - prefsizey + 1;
1109                                 remainder->ymax = ar->winrct.ymin - 1;
1110                         }
1111                         else {
1112                                 ar->winrct.ymax = ar->winrct.ymin + prefsizey - 1;
1113                                 remainder->ymin = ar->winrct.ymax + 1;
1114                         }
1115                 }
1116         }
1117         else if (ELEM(alignment, RGN_ALIGN_LEFT, RGN_ALIGN_RIGHT)) {
1118
1119                 if (rct_fits(remainder, 'h', prefsizex) < 0) {
1120                         ar->flag |= RGN_FLAG_TOO_SMALL;
1121                 }
1122                 else {
1123                         int fac = rct_fits(remainder, 'h', prefsizex);
1124
1125                         if (fac < 0)
1126                                 prefsizex += fac;
1127
1128                         ar->winrct = *remainder;
1129
1130                         if (alignment == RGN_ALIGN_RIGHT) {
1131                                 ar->winrct.xmin = ar->winrct.xmax - prefsizex + 1;
1132                                 if (ar->overlap == 0)
1133                                         remainder->xmax = ar->winrct.xmin - 1;
1134                         }
1135                         else {
1136                                 ar->winrct.xmax = ar->winrct.xmin + prefsizex - 1;
1137                                 if (ar->overlap == 0)
1138                                         remainder->xmin = ar->winrct.xmax + 1;
1139                         }
1140                 }
1141         }
1142         else if (alignment == RGN_ALIGN_VSPLIT || alignment == RGN_ALIGN_HSPLIT) {
1143                 /* percentage subdiv*/
1144                 ar->winrct = *remainder;
1145
1146                 if (alignment == RGN_ALIGN_HSPLIT) {
1147                         if (rct_fits(remainder, 'h', prefsizex) > 4) {
1148                                 ar->winrct.xmax = BLI_rcti_cent_x(remainder);
1149                                 remainder->xmin = ar->winrct.xmax + 1;
1150                         }
1151                         else {
1152                                 BLI_rcti_init(remainder, 0, 0, 0, 0);
1153                         }
1154                 }
1155                 else {
1156                         if (rct_fits(remainder, 'v', prefsizey) > 4) {
1157                                 ar->winrct.ymax = BLI_rcti_cent_y(remainder);
1158                                 remainder->ymin = ar->winrct.ymax + 1;
1159                         }
1160                         else {
1161                                 BLI_rcti_init(remainder, 0, 0, 0, 0);
1162                         }
1163                 }
1164         }
1165         else if (alignment == RGN_ALIGN_QSPLIT) {
1166                 ar->winrct = *remainder;
1167
1168                 /* test if there's still 4 regions left */
1169                 if (quad == 0) {
1170                         ARegion *artest = ar->next;
1171                         int count = 1;
1172
1173                         while (artest) {
1174                                 artest->alignment = RGN_ALIGN_QSPLIT;
1175                                 artest = artest->next;
1176                                 count++;
1177                         }
1178
1179                         if (count != 4) {
1180                                 /* let's stop adding regions */
1181                                 BLI_rcti_init(remainder, 0, 0, 0, 0);
1182                                 if (G.debug & G_DEBUG)
1183                                         printf("region quadsplit failed\n");
1184                         }
1185                         else {
1186                                 quad = 1;
1187                         }
1188                 }
1189                 if (quad) {
1190                         if (quad == 1) { /* left bottom */
1191                                 ar->winrct.xmax = BLI_rcti_cent_x(remainder);
1192                                 ar->winrct.ymax = BLI_rcti_cent_y(remainder);
1193                         }
1194                         else if (quad == 2) { /* left top */
1195                                 ar->winrct.xmax = BLI_rcti_cent_x(remainder);
1196                                 ar->winrct.ymin = BLI_rcti_cent_y(remainder) + 1;
1197                         }
1198                         else if (quad == 3) { /* right bottom */
1199                                 ar->winrct.xmin = BLI_rcti_cent_x(remainder) + 1;
1200                                 ar->winrct.ymax = BLI_rcti_cent_y(remainder);
1201                         }
1202                         else {  /* right top */
1203                                 ar->winrct.xmin = BLI_rcti_cent_x(remainder) + 1;
1204                                 ar->winrct.ymin = BLI_rcti_cent_y(remainder) + 1;
1205                                 BLI_rcti_init(remainder, 0, 0, 0, 0);
1206                         }
1207
1208                         quad++;
1209                 }
1210         }
1211
1212         /* for speedup */
1213         ar->winx = BLI_rcti_size_x(&ar->winrct) + 1;
1214         ar->winy = BLI_rcti_size_y(&ar->winrct) + 1;
1215
1216         /* if region opened normally, we store this for hide/reveal usage */
1217         /* prevent rounding errors for UI_DPI_FAC mult and divide */
1218         if (ar->winx > 1) ar->sizex = (ar->winx + 0.5f) /  UI_DPI_FAC;
1219         if (ar->winy > 1) ar->sizey = (ar->winy + 0.5f) /  UI_DPI_FAC;
1220
1221         /* exception for multiple overlapping regions on same spot */
1222         if (ar->overlap)
1223                 region_overlap_fix(sa, ar);
1224
1225         /* set winrect for azones */
1226         if (ar->flag & (RGN_FLAG_HIDDEN | RGN_FLAG_TOO_SMALL)) {
1227                 ar->winrct = *remainder;
1228
1229                 if (alignment == RGN_ALIGN_TOP)
1230                         ar->winrct.ymin = ar->winrct.ymax;
1231                 else if (alignment == RGN_ALIGN_BOTTOM)
1232                         ar->winrct.ymax = ar->winrct.ymin;
1233                 else if (alignment == RGN_ALIGN_RIGHT)
1234                         ar->winrct.xmin = ar->winrct.xmax;
1235                 else if (alignment == RGN_ALIGN_LEFT)
1236                         ar->winrct.xmax = ar->winrct.xmin;
1237                 else /* prevent winrct to be valid */
1238                         ar->winrct.xmax = ar->winrct.xmin;
1239         }
1240
1241         /* restore prev-split exception */
1242         if (ar->alignment & RGN_SPLIT_PREV) {
1243                 if (ar->prev) {
1244                         remainder = remainder_prev;
1245                         ar->prev->winx = BLI_rcti_size_x(&ar->prev->winrct) + 1;
1246                         ar->prev->winy = BLI_rcti_size_y(&ar->prev->winrct) + 1;
1247                 }
1248         }
1249
1250         /* in end, add azones, where appropriate */
1251         if (ar->regiontype == RGN_TYPE_HEADER && ar->winy + 6 > sa->winy) {
1252                 /* The logic for this is: when the header takes up the full area,
1253                  * disallow hiding it to view the main window.
1254                  *
1255                  * Without this, you can drag down the file selectors header and hide it
1256                  * by accident very easily (highly annoying!), the value 6 is arbitrary
1257                  * but accounts for small common rounding problems when scaling the UI,
1258                  * must be minimum '4' */
1259         }
1260         else {
1261                 if (ELEM(win->screen->state, SCREENNORMAL, SCREENMAXIMIZED)) {
1262                         region_azone_add(sa, ar, alignment, false);
1263                 }
1264                 else {
1265                         region_azone_add(sa, ar, alignment, true);
1266                         fullscreen_azone_initialize(sa, ar);
1267                 }
1268         }
1269
1270         region_rect_recursive(win, sa, ar->next, remainder, quad);
1271 }
1272
1273 static void area_calc_totrct(ScrArea *sa, int sizex, int sizey)
1274 {
1275         short rt = (short) U.pixelsize;
1276
1277         if (sa->v1->vec.x > 0) sa->totrct.xmin = sa->v1->vec.x + rt;
1278         else sa->totrct.xmin = sa->v1->vec.x;
1279         if (sa->v4->vec.x < sizex - 1) sa->totrct.xmax = sa->v4->vec.x - rt;
1280         else sa->totrct.xmax = sa->v4->vec.x;
1281
1282         if (sa->v1->vec.y > 0) sa->totrct.ymin = sa->v1->vec.y + rt;
1283         else sa->totrct.ymin = sa->v1->vec.y;
1284         if (sa->v2->vec.y < sizey - 1) sa->totrct.ymax = sa->v2->vec.y - rt;
1285         else sa->totrct.ymax = sa->v2->vec.y;
1286
1287         /* for speedup */
1288         sa->winx = BLI_rcti_size_x(&sa->totrct) + 1;
1289         sa->winy = BLI_rcti_size_y(&sa->totrct) + 1;
1290 }
1291
1292
1293 /* used for area initialize below */
1294 static void region_subwindow(wmWindow *win, ARegion *ar)
1295 {
1296         bool hidden = (ar->flag & (RGN_FLAG_HIDDEN | RGN_FLAG_TOO_SMALL)) != 0;
1297
1298         if ((ar->alignment & RGN_SPLIT_PREV) && ar->prev)
1299                 hidden = hidden || (ar->prev->flag & (RGN_FLAG_HIDDEN | RGN_FLAG_TOO_SMALL));
1300
1301         if (hidden) {
1302                 if (ar->swinid)
1303                         wm_subwindow_close(win, ar->swinid);
1304                 ar->swinid = 0;
1305         }
1306         else if (ar->swinid == 0)
1307                 ar->swinid = wm_subwindow_open(win, &ar->winrct);
1308         else
1309                 wm_subwindow_position(win, ar->swinid, &ar->winrct);
1310 }
1311
1312 static void ed_default_handlers(wmWindowManager *wm, ScrArea *sa, ListBase *handlers, int flag)
1313 {
1314         /* note, add-handler checks if it already exists */
1315
1316         /* XXX it would be good to have boundbox checks for some of these... */
1317         if (flag & ED_KEYMAP_UI) {
1318                 /* user interface widgets */
1319                 UI_region_handlers_add(handlers);
1320         }
1321         if (flag & ED_KEYMAP_VIEW2D) {
1322                 /* 2d-viewport handling+manipulation */
1323                 wmKeyMap *keymap = WM_keymap_find(wm->defaultconf, "View2D", 0, 0);
1324                 WM_event_add_keymap_handler(handlers, keymap);
1325         }
1326         if (flag & ED_KEYMAP_MARKERS) {
1327                 /* time-markers */
1328                 wmKeyMap *keymap = WM_keymap_find(wm->defaultconf, "Markers", 0, 0);
1329
1330                 /* time space only has this keymap, the others get a boundbox restricted map */
1331                 if (sa->spacetype != SPACE_TIME) {
1332                         ARegion *ar;
1333                         /* same local check for all areas */
1334                         static rcti rect = {0, 10000, 0, -1};
1335                         rect.ymax = UI_MARKER_MARGIN_Y;
1336                         ar = BKE_area_find_region_type(sa, RGN_TYPE_WINDOW);
1337                         if (ar) {
1338                                 WM_event_add_keymap_handler_bb(handlers, keymap, &rect, &ar->winrct);
1339                         }
1340                 }
1341                 else
1342                         WM_event_add_keymap_handler(handlers, keymap);
1343         }
1344         if (flag & ED_KEYMAP_ANIMATION) {
1345                 /* frame changing and timeline operators (for time spaces) */
1346                 wmKeyMap *keymap = WM_keymap_find(wm->defaultconf, "Animation", 0, 0);
1347                 WM_event_add_keymap_handler(handlers, keymap);
1348         }
1349         if (flag & ED_KEYMAP_FRAMES) {
1350                 /* frame changing/jumping (for all spaces) */
1351                 wmKeyMap *keymap = WM_keymap_find(wm->defaultconf, "Frames", 0, 0);
1352                 WM_event_add_keymap_handler(handlers, keymap);
1353         }
1354         if (flag & ED_KEYMAP_GPENCIL) {
1355                 /* grease pencil */
1356                 /* NOTE: This is now 2 keymaps - One for basic functionality,
1357                  *       and one that only applies when "Edit Mode" is enabled
1358                  *       for strokes.
1359                  *
1360                  *       For now, it's easier to just include both,
1361                  *       since you hardly want one without the other.
1362                  */
1363                 wmKeyMap *keymap_general = WM_keymap_find(wm->defaultconf, "Grease Pencil", 0, 0);
1364                 wmKeyMap *keymap_edit = WM_keymap_find(wm->defaultconf, "Grease Pencil Stroke Edit Mode", 0, 0);
1365
1366                 WM_event_add_keymap_handler(handlers, keymap_general);
1367                 WM_event_add_keymap_handler(handlers, keymap_edit);
1368         }
1369         if (flag & ED_KEYMAP_HEADER) {
1370                 /* standard keymap for headers regions */
1371                 wmKeyMap *keymap = WM_keymap_find(wm->defaultconf, "Header", 0, 0);
1372                 WM_event_add_keymap_handler(handlers, keymap);
1373         }
1374 }
1375
1376
1377 /* called in screen_refresh, or screens_init, also area size changes */
1378 void ED_area_initialize(wmWindowManager *wm, wmWindow *win, ScrArea *sa)
1379 {
1380         ARegion *ar;
1381         rcti rect;
1382
1383         /* set typedefinitions */
1384         sa->type = BKE_spacetype_from_id(sa->spacetype);
1385
1386         if (sa->type == NULL) {
1387                 sa->butspacetype = sa->spacetype = SPACE_VIEW3D;
1388                 sa->type = BKE_spacetype_from_id(sa->spacetype);
1389         }
1390
1391         for (ar = sa->regionbase.first; ar; ar = ar->next)
1392                 ar->type = BKE_regiontype_from_id(sa->type, ar->regiontype);
1393
1394         /* area sizes */
1395         area_calc_totrct(sa, WM_window_pixels_x(win), WM_window_pixels_y(win));
1396
1397         /* clear all azones, add the area triange widgets */
1398         area_azone_initialize(win, win->screen, sa);
1399
1400         /* region rect sizes */
1401         rect = sa->totrct;
1402         region_rect_recursive(win, sa, sa->regionbase.first, &rect, 0);
1403
1404         /* default area handlers */
1405         ed_default_handlers(wm, sa, &sa->handlers, sa->type->keymapflag);
1406         /* checks spacedata, adds own handlers */
1407         if (sa->type->init)
1408                 sa->type->init(wm, sa);
1409
1410         /* region windows, default and own handlers */
1411         for (ar = sa->regionbase.first; ar; ar = ar->next) {
1412                 region_subwindow(win, ar);
1413
1414                 if (ar->swinid) {
1415                         /* default region handlers */
1416                         ed_default_handlers(wm, sa, &ar->handlers, ar->type->keymapflag);
1417                         /* own handlers */
1418                         if (ar->type->init)
1419                                 ar->type->init(wm, ar);
1420                 }
1421                 else {
1422                         /* prevent uiblocks to run */
1423                         UI_blocklist_free(NULL, &ar->uiblocks);
1424                 }
1425         }
1426 }
1427
1428 static void region_update_rect(ARegion *ar)
1429 {
1430         ar->winx = BLI_rcti_size_x(&ar->winrct) + 1;
1431         ar->winy = BLI_rcti_size_y(&ar->winrct) + 1;
1432
1433         /* v2d mask is used to subtract scrollbars from a 2d view. Needs initialize here. */
1434         BLI_rcti_init(&ar->v2d.mask, 0, ar->winx - 1, 0, ar->winy -1);
1435 }
1436
1437 /**
1438  * Call to move a popup window (keep OpenGL context free!)
1439  */
1440 void ED_region_update_rect(bContext *C, ARegion *ar)
1441 {
1442         wmWindow *win = CTX_wm_window(C);
1443
1444         wm_subwindow_rect_set(win, ar->swinid, &ar->winrct);
1445
1446         region_update_rect(ar);
1447 }
1448
1449 /* externally called for floating regions like menus */
1450 void ED_region_init(bContext *C, ARegion *ar)
1451 {
1452 //      ARegionType *at = ar->type;
1453
1454         /* refresh can be called before window opened */
1455         region_subwindow(CTX_wm_window(C), ar);
1456
1457         region_update_rect(ar);
1458 }
1459
1460 /* for quick toggle, can skip fades */
1461 void region_toggle_hidden(bContext *C, ARegion *ar, const bool do_fade)
1462 {
1463         ScrArea *sa = CTX_wm_area(C);
1464
1465         ar->flag ^= RGN_FLAG_HIDDEN;
1466
1467         if (do_fade && ar->overlap) {
1468                 /* starts a timer, and in end calls the stuff below itself (region_sblend_invoke()) */
1469                 region_blend_start(C, sa, ar);
1470         }
1471         else {
1472                 if (ar->flag & RGN_FLAG_HIDDEN)
1473                         WM_event_remove_handlers(C, &ar->handlers);
1474
1475                 ED_area_initialize(CTX_wm_manager(C), CTX_wm_window(C), sa);
1476                 ED_area_tag_redraw(sa);
1477         }
1478 }
1479
1480 /* exported to all editors, uses fading default */
1481 void ED_region_toggle_hidden(bContext *C, ARegion *ar)
1482 {
1483         region_toggle_hidden(C, ar, true);
1484 }
1485
1486 /**
1487  * we swap spaces for fullscreen to keep all allocated data area vertices were set
1488  */
1489 void ED_area_data_copy(ScrArea *sa_dst, ScrArea *sa_src, const bool do_free)
1490 {
1491         SpaceType *st;
1492         ARegion *ar;
1493         const char spacetype = sa_dst->spacetype;
1494         const short flag_copy = HEADER_NO_PULLDOWN;
1495
1496         sa_dst->headertype = sa_src->headertype;
1497         sa_dst->spacetype = sa_src->spacetype;
1498         sa_dst->type = sa_src->type;
1499         sa_dst->butspacetype = sa_src->butspacetype;
1500
1501         sa_dst->flag = (sa_dst->flag & ~flag_copy) | (sa_src->flag & flag_copy);
1502
1503         /* area */
1504         if (do_free) {
1505                 BKE_spacedata_freelist(&sa_dst->spacedata);
1506         }
1507         BKE_spacedata_copylist(&sa_dst->spacedata, &sa_src->spacedata);
1508
1509         /* Note; SPACE_EMPTY is possible on new screens */
1510
1511         /* regions */
1512         if (do_free) {
1513                 st = BKE_spacetype_from_id(spacetype);
1514                 for (ar = sa_dst->regionbase.first; ar; ar = ar->next)
1515                         BKE_area_region_free(st, ar);
1516                 BLI_freelistN(&sa_dst->regionbase);
1517         }
1518         st = BKE_spacetype_from_id(sa_src->spacetype);
1519         for (ar = sa_src->regionbase.first; ar; ar = ar->next) {
1520                 ARegion *newar = BKE_area_region_copy(st, ar);
1521                 BLI_addtail(&sa_dst->regionbase, newar);
1522         }
1523 }
1524
1525 void ED_area_data_swap(ScrArea *sa_dst, ScrArea *sa_src)
1526 {
1527         SWAP(short, sa_dst->headertype, sa_src->headertype);
1528         SWAP(char, sa_dst->spacetype, sa_src->spacetype);
1529         SWAP(SpaceType *, sa_dst->type, sa_src->type);
1530         SWAP(char, sa_dst->butspacetype, sa_src->butspacetype);
1531
1532
1533         SWAP(ListBase, sa_dst->spacedata, sa_src->spacedata);
1534         SWAP(ListBase, sa_dst->regionbase, sa_src->regionbase);
1535 }
1536
1537 /* *********** Space switching code *********** */
1538
1539 void ED_area_swapspace(bContext *C, ScrArea *sa1, ScrArea *sa2)
1540 {
1541         ScrArea *tmp = MEM_callocN(sizeof(ScrArea), "addscrarea");
1542
1543         ED_area_exit(C, sa1);
1544         ED_area_exit(C, sa2);
1545
1546         ED_area_data_copy(tmp, sa1, false);
1547         ED_area_data_copy(sa1, sa2, true);
1548         ED_area_data_copy(sa2, tmp, true);
1549         ED_area_initialize(CTX_wm_manager(C), CTX_wm_window(C), sa1);
1550         ED_area_initialize(CTX_wm_manager(C), CTX_wm_window(C), sa2);
1551
1552         BKE_screen_area_free(tmp);
1553         MEM_freeN(tmp);
1554
1555         /* tell WM to refresh, cursor types etc */
1556         WM_event_add_mousemove(C);
1557
1558         ED_area_tag_redraw(sa1);
1559         ED_area_tag_refresh(sa1);
1560         ED_area_tag_redraw(sa2);
1561         ED_area_tag_refresh(sa2);
1562 }
1563
1564 void ED_area_newspace(bContext *C, ScrArea *sa, int type)
1565 {
1566         if (sa->spacetype != type) {
1567                 SpaceType *st;
1568                 SpaceLink *slold;
1569                 SpaceLink *sl;
1570
1571                 ED_area_exit(C, sa);
1572
1573                 st = BKE_spacetype_from_id(type);
1574                 slold = sa->spacedata.first;
1575
1576                 sa->spacetype = type;
1577                 sa->butspacetype = type;
1578                 sa->type = st;
1579
1580                 /* check previously stored space */
1581                 for (sl = sa->spacedata.first; sl; sl = sl->next)
1582                         if (sl->spacetype == type)
1583                                 break;
1584
1585                 /* old spacedata... happened during work on 2.50, remove */
1586                 if (sl && BLI_listbase_is_empty(&sl->regionbase)) {
1587                         st->free(sl);
1588                         BLI_freelinkN(&sa->spacedata, sl);
1589                         if (slold == sl) {
1590                                 slold = NULL;
1591                         }
1592                         sl = NULL;
1593                 }
1594
1595                 if (sl) {
1596                         /* swap regions */
1597                         slold->regionbase = sa->regionbase;
1598                         sa->regionbase = sl->regionbase;
1599                         BLI_listbase_clear(&sl->regionbase);
1600
1601                         /* put in front of list */
1602                         BLI_remlink(&sa->spacedata, sl);
1603                         BLI_addhead(&sa->spacedata, sl);
1604                 }
1605                 else {
1606                         /* new space */
1607                         if (st) {
1608                                 sl = st->new(C);
1609                                 BLI_addhead(&sa->spacedata, sl);
1610
1611                                 /* swap regions */
1612                                 if (slold)
1613                                         slold->regionbase = sa->regionbase;
1614                                 sa->regionbase = sl->regionbase;
1615                                 BLI_listbase_clear(&sl->regionbase);
1616                         }
1617                 }
1618
1619                 ED_area_initialize(CTX_wm_manager(C), CTX_wm_window(C), sa);
1620
1621                 /* tell WM to refresh, cursor types etc */
1622                 WM_event_add_mousemove(C);
1623
1624                 /* send space change notifier */
1625                 WM_event_add_notifier(C, NC_SPACE | ND_SPACE_CHANGED, sa);
1626
1627                 ED_area_tag_refresh(sa);
1628         }
1629
1630         /* also redraw when re-used */
1631         ED_area_tag_redraw(sa);
1632 }
1633
1634 void ED_area_prevspace(bContext *C, ScrArea *sa)
1635 {
1636         SpaceLink *sl = sa->spacedata.first;
1637
1638         if (sl && sl->next) {
1639                 /* workaround for case of double prevspace, render window
1640                  * with a file browser on top of it */
1641                 if (sl->next->spacetype == SPACE_FILE && sl->next->next)
1642                         ED_area_newspace(C, sa, sl->next->next->spacetype);
1643                 else
1644                         ED_area_newspace(C, sa, sl->next->spacetype);
1645         }
1646         else {
1647                 /* no change */
1648                 return;
1649         }
1650         sa->flag &= ~AREA_FLAG_STACKED_FULLSCREEN;
1651
1652         ED_area_tag_redraw(sa);
1653
1654         /* send space change notifier */
1655         WM_event_add_notifier(C, NC_SPACE | ND_SPACE_CHANGED, sa);
1656 }
1657
1658 /* returns offset for next button in header */
1659 int ED_area_header_switchbutton(const bContext *C, uiBlock *block, int yco)
1660 {
1661         ScrArea *sa = CTX_wm_area(C);
1662         bScreen *scr = CTX_wm_screen(C);
1663         PointerRNA areaptr;
1664         int xco = 0.4 * U.widget_unit;
1665
1666         RNA_pointer_create(&(scr->id), &RNA_Area, sa, &areaptr);
1667
1668         uiDefButR(block, UI_BTYPE_MENU, 0, "", xco, yco, 1.5 * U.widget_unit, U.widget_unit,
1669                   &areaptr, "type", 0, 0.0f, 0.0f, 0.0f, 0.0f, "");
1670
1671         return xco + 1.7 * U.widget_unit;
1672 }
1673
1674 /************************ standard UI regions ************************/
1675
1676 void ED_region_panels(const bContext *C, ARegion *ar, int vertical, const char *context, int contextnr)
1677 {
1678         ScrArea *sa = CTX_wm_area(C);
1679         uiStyle *style = UI_style_get_dpi();
1680         uiBlock *block;
1681         PanelType *pt;
1682         Panel *panel;
1683         View2D *v2d = &ar->v2d;
1684         View2DScrollers *scrollers;
1685         int x, y, xco, yco, w, em, triangle;
1686         bool is_context_new = 0;
1687         int redo;
1688         int scroll;
1689
1690         bool use_category_tabs = (ar->regiontype == RGN_TYPE_TOOLS);  /* XXX, should use some better check? */
1691         /* offset panels for small vertical tab area */
1692         const char *category = NULL;
1693         const int category_tabs_width = UI_PANEL_CATEGORY_MARGIN_WIDTH;
1694         int margin_x = 0;
1695
1696         BLI_SMALLSTACK_DECLARE(pt_stack, PanelType *);
1697
1698         if (contextnr != -1)
1699                 is_context_new = UI_view2d_tab_set(v2d, contextnr);
1700
1701         /* before setting the view */
1702         if (vertical) {
1703                 /* only allow scrolling in vertical direction */
1704                 v2d->keepofs |= V2D_LOCKOFS_X | V2D_KEEPOFS_Y;
1705                 v2d->keepofs &= ~(V2D_LOCKOFS_Y | V2D_KEEPOFS_X);
1706                 v2d->scroll &= ~(V2D_SCROLL_BOTTOM);
1707                 v2d->scroll |= (V2D_SCROLL_RIGHT);
1708         }
1709         else {
1710                 /* for now, allow scrolling in both directions (since layouts are optimized for vertical,
1711                  * they often don't fit in horizontal layout)
1712                  */
1713                 v2d->keepofs &= ~(V2D_LOCKOFS_X | V2D_LOCKOFS_Y | V2D_KEEPOFS_X | V2D_KEEPOFS_Y);
1714                 v2d->scroll |= (V2D_SCROLL_BOTTOM);
1715                 v2d->scroll &= ~(V2D_SCROLL_RIGHT);
1716         }
1717
1718         scroll = v2d->scroll;
1719
1720
1721         /* collect panels to draw */
1722         for (pt = ar->type->paneltypes.last; pt; pt = pt->prev) {
1723                 /* verify context */
1724                 if (context && pt->context[0] && !STREQ(context, pt->context)) {
1725                         continue;
1726                 }
1727
1728                 /* draw panel */
1729                 if (pt->draw && (!pt->poll || pt->poll(C, pt))) {
1730                         BLI_SMALLSTACK_PUSH(pt_stack, pt);
1731                 }
1732         }
1733
1734
1735         /* collect categories */
1736         if (use_category_tabs) {
1737                 UI_panel_category_clear_all(ar);
1738
1739                 /* gather unique categories */
1740                 BLI_SMALLSTACK_ITER_BEGIN(pt_stack, pt)
1741                 {
1742                         if (pt->category[0]) {
1743                                 if (!UI_panel_category_find(ar, pt->category)) {
1744                                         UI_panel_category_add(ar, pt->category);
1745                                 }
1746                         }
1747                 }
1748                 BLI_SMALLSTACK_ITER_END;
1749
1750                 if (!UI_panel_category_is_visible(ar)) {
1751                         use_category_tabs = false;
1752                 }
1753                 else {
1754                         category = UI_panel_category_active_get(ar, true);
1755                         margin_x = category_tabs_width;
1756                 }
1757         }
1758
1759
1760         /* sortof hack - but we cannot predict the height of panels, until it's being generated */
1761         /* the layout engine works with fixed width (from v2d->cur), which is being set at end of the loop */
1762         /* in case scroller settings (hide flags) differ from previous, the whole loop gets done again */
1763         for (redo = 2; redo > 0; redo--) {
1764
1765                 if (vertical) {
1766                         w = BLI_rctf_size_x(&v2d->cur);
1767                         em = (ar->type->prefsizex) ? 10 : 20; /* works out to 10*UI_UNIT_X or 20*UI_UNIT_X */
1768                 }
1769                 else {
1770                         w = UI_PANEL_WIDTH;
1771                         em = (ar->type->prefsizex) ? 10 : 20;
1772                 }
1773
1774                 w -= margin_x;
1775
1776                 /* create panels */
1777                 UI_panels_begin(C, ar);
1778
1779                 /* set view2d view matrix  - UI_block_begin() stores it */
1780                 UI_view2d_view_ortho(v2d);
1781
1782                 BLI_SMALLSTACK_ITER_BEGIN(pt_stack, pt)
1783                 {
1784                         bool open;
1785
1786                         panel = UI_panel_find_by_type(ar, pt);
1787
1788                         if (use_category_tabs && pt->category[0] && !STREQ(category, pt->category)) {
1789                                 if ((panel == NULL) || ((panel->flag & PNL_PIN) == 0)) {
1790                                         continue;
1791                                 }
1792                         }
1793
1794                         /* draw panel */
1795                         block = UI_block_begin(C, ar, pt->idname, UI_EMBOSS);
1796                         panel = UI_panel_begin(sa, ar, block, pt, panel, &open);
1797
1798                         /* bad fixed values */
1799                         triangle = (int)(UI_UNIT_Y * 1.1f);
1800
1801                         if (pt->draw_header && !(pt->flag & PNL_NO_HEADER) && (open || vertical)) {
1802                                 /* for enabled buttons */
1803                                 panel->layout = UI_block_layout(
1804                                         block, UI_LAYOUT_HORIZONTAL, UI_LAYOUT_HEADER,
1805                                         triangle, (UI_UNIT_Y * 1.1f) + style->panelspace, UI_UNIT_Y, 1, 0, style);
1806
1807                                 pt->draw_header(C, panel);
1808
1809                                 UI_block_layout_resolve(block, &xco, &yco);
1810                                 panel->labelofs = xco - triangle;
1811                                 panel->layout = NULL;
1812                         }
1813                         else {
1814                                 panel->labelofs = 0;
1815                         }
1816
1817                         if (open) {
1818                                 short panelContext;
1819
1820                                 /* panel context can either be toolbar region or normal panels region */
1821                                 if (ar->regiontype == RGN_TYPE_TOOLS)
1822                                         panelContext = UI_LAYOUT_TOOLBAR;
1823                                 else
1824                                         panelContext = UI_LAYOUT_PANEL;
1825
1826                                 panel->layout = UI_block_layout(
1827                                         block, UI_LAYOUT_VERTICAL, panelContext,
1828                                         style->panelspace, 0, w - 2 * style->panelspace, em, 0, style);
1829
1830                                 pt->draw(C, panel);
1831
1832                                 UI_block_layout_resolve(block, &xco, &yco);
1833                                 panel->layout = NULL;
1834
1835                                 yco -= 2 * style->panelspace;
1836                                 UI_panel_end(block, w, -yco);
1837                         }
1838                         else {
1839                                 yco = 0;
1840                                 UI_panel_end(block, w, 0);
1841                         }
1842
1843                         UI_block_end(C, block);
1844                 }
1845                 BLI_SMALLSTACK_ITER_END;
1846
1847                 /* align panels and return size */
1848                 UI_panels_end(C, ar, &x, &y);
1849
1850                 /* before setting the view */
1851                 if (vertical) {
1852                         /* we always keep the scroll offset - so the total view gets increased with the scrolled away part */
1853                         if (v2d->cur.ymax < - 0.001f)
1854                                 y = min_ii(y, v2d->cur.ymin);
1855
1856                         y = -y;
1857                 }
1858                 else {
1859                         /* don't jump back when panels close or hide */
1860                         if (!is_context_new)
1861                                 x = max_ii(x, v2d->cur.xmax);
1862                         y = -y;
1863                 }
1864
1865                 /* this also changes the 'cur' */
1866                 UI_view2d_totRect_set(v2d, x, y);
1867
1868                 if (scroll != v2d->scroll) {
1869                         /* Note: this code scales fine, but because of rounding differences, positions of elements
1870                          * flip +1 or -1 pixel compared to redoing the entire layout again.
1871                          * Leaving in commented code for future tests */
1872 #if 0
1873                         UI_panels_scale(ar, BLI_rctf_size_x(&v2d->cur));
1874                         break;
1875 #endif
1876                 }
1877                 else {
1878                         break;
1879                 }
1880         }
1881
1882         /* clear */
1883         if (ar->overlap) {
1884                 /* view should be in pixelspace */
1885                 UI_view2d_view_restore(C);
1886                 glEnable(GL_BLEND);
1887                 UI_ThemeColor4((ar->type->regionid == RGN_TYPE_PREVIEW) ? TH_PREVIEW_BACK : TH_BACK);
1888                 glRecti(0, 0, BLI_rcti_size_x(&ar->winrct), BLI_rcti_size_y(&ar->winrct));
1889                 glDisable(GL_BLEND);
1890         }
1891         else {
1892                 UI_ThemeClearColor((ar->type->regionid == RGN_TYPE_PREVIEW) ? TH_PREVIEW_BACK : TH_BACK);
1893                 glClear(GL_COLOR_BUFFER_BIT);
1894         }
1895
1896
1897         /* set the view */
1898         UI_view2d_view_ortho(v2d);
1899
1900         /* draw panels */
1901         UI_panels_draw(C, ar);
1902
1903         /* restore view matrix */
1904         UI_view2d_view_restore(C);
1905
1906         if (use_category_tabs) {
1907                 UI_panel_category_draw_all(ar, category);
1908         }
1909
1910         /* scrollers */
1911         scrollers = UI_view2d_scrollers_calc(C, v2d, V2D_ARG_DUMMY, V2D_ARG_DUMMY, V2D_ARG_DUMMY, V2D_ARG_DUMMY);
1912         UI_view2d_scrollers_draw(C, v2d, scrollers);
1913         UI_view2d_scrollers_free(scrollers);
1914 }
1915
1916 void ED_region_panels_init(wmWindowManager *wm, ARegion *ar)
1917 {
1918         wmKeyMap *keymap;
1919
1920         UI_view2d_region_reinit(&ar->v2d, V2D_COMMONVIEW_PANELS_UI, ar->winx, ar->winy);
1921
1922         keymap = WM_keymap_find(wm->defaultconf, "View2D Buttons List", 0, 0);
1923         WM_event_add_keymap_handler(&ar->handlers, keymap);
1924 }
1925
1926 void ED_region_header(const bContext *C, ARegion *ar)
1927 {
1928         uiStyle *style = UI_style_get_dpi();
1929         uiBlock *block;
1930         uiLayout *layout;
1931         HeaderType *ht;
1932         Header header = {NULL};
1933         int maxco, xco, yco;
1934         int headery = ED_area_headersize();
1935
1936         /* clear */
1937         UI_ThemeClearColor((ED_screen_area_active(C)) ? TH_HEADER : TH_HEADERDESEL);
1938         glClear(GL_COLOR_BUFFER_BIT);
1939
1940         /* set view2d view matrix for scrolling (without scrollers) */
1941         UI_view2d_view_ortho(&ar->v2d);
1942
1943         xco = maxco = 0.4f * UI_UNIT_X;
1944         yco = headery - floor(0.2f * UI_UNIT_Y);
1945
1946         /* draw all headers types */
1947         for (ht = ar->type->headertypes.first; ht; ht = ht->next) {
1948                 block = UI_block_begin(C, ar, ht->idname, UI_EMBOSS);
1949                 layout = UI_block_layout(block, UI_LAYOUT_HORIZONTAL, UI_LAYOUT_HEADER, xco, yco, UI_UNIT_Y, 1, 0, style);
1950
1951                 if (ht->draw) {
1952                         header.type = ht;
1953                         header.layout = layout;
1954                         ht->draw(C, &header);
1955
1956                         /* for view2d */
1957                         xco = uiLayoutGetWidth(layout);
1958                         if (xco > maxco)
1959                                 maxco = xco;
1960                 }
1961
1962                 UI_block_layout_resolve(block, &xco, &yco);
1963
1964                 /* for view2d */
1965                 if (xco > maxco)
1966                         maxco = xco;
1967
1968                 UI_block_end(C, block);
1969                 UI_block_draw(C, block);
1970         }
1971
1972         /* always as last  */
1973         UI_view2d_totRect_set(&ar->v2d, maxco + UI_UNIT_X + 80, headery);
1974
1975         /* restore view matrix? */
1976         UI_view2d_view_restore(C);
1977 }
1978
1979 void ED_region_header_init(ARegion *ar)
1980 {
1981         UI_view2d_region_reinit(&ar->v2d, V2D_COMMONVIEW_HEADER, ar->winx, ar->winy);
1982 }
1983
1984 /* UI_UNIT_Y is defined as U variable now, depending dpi */
1985 int ED_area_headersize(void)
1986 {
1987         return (int)(HEADERY * UI_DPI_FAC);
1988 }
1989
1990 void ED_region_info_draw(ARegion *ar, const char *text, int block, float fill_color[4])
1991 {
1992         const int header_height = UI_UNIT_Y;
1993         uiStyle *style = UI_style_get_dpi();
1994         int fontid = style->widget.uifont_id;
1995         GLint scissor[4];
1996         rcti rect;
1997
1998         /* background box */
1999         ED_region_visible_rect(ar, &rect);
2000         rect.ymin = BLI_rcti_size_y(&ar->winrct) - header_height;
2001
2002         /* box fill entire width or just around text */
2003         if (!block)
2004                 rect.xmax = min_ii(rect.xmax, rect.xmin + BLF_width(fontid, text, BLF_DRAW_STR_DUMMY_MAX) + 1.2f * U.widget_unit);
2005
2006         rect.ymax = BLI_rcti_size_y(&ar->winrct);
2007
2008         /* setup scissor */
2009         glGetIntegerv(GL_SCISSOR_BOX, scissor);
2010         glScissor(ar->winrct.xmin + rect.xmin, ar->winrct.ymin + rect.ymin,
2011                   BLI_rcti_size_x(&rect) + 1, BLI_rcti_size_y(&rect) + 1);
2012
2013         glEnable(GL_BLEND);
2014         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2015         glColor4fv(fill_color);
2016         glRecti(rect.xmin, rect.ymin, rect.xmax + 1, rect.ymax + 1);
2017         glDisable(GL_BLEND);
2018
2019         /* text */
2020         UI_ThemeColor(TH_TEXT_HI);
2021         BLF_clipping(fontid, rect.xmin, rect.ymin, rect.xmax, rect.ymax);
2022         BLF_enable(fontid, BLF_CLIPPING);
2023         BLF_position(fontid, rect.xmin + 0.6f * U.widget_unit, rect.ymin + 0.3f * U.widget_unit, 0.0f);
2024
2025         BLF_draw(fontid, text, BLF_DRAW_STR_DUMMY_MAX);
2026
2027         BLF_disable(fontid, BLF_CLIPPING);
2028
2029         /* restore scissor as it was before */
2030         glScissor(scissor[0], scissor[1], scissor[2], scissor[3]);
2031 }
2032
2033 #define MAX_METADATA_STR    1024
2034
2035 const char *meta_data_list[] =
2036 {
2037         "File",
2038         "Strip",
2039         "Note",
2040         "Date",
2041         "RenderTime",
2042         "Marker",
2043         "Time",
2044         "Frame",
2045         "Camera",
2046         "Scene"
2047 };
2048
2049 BLI_INLINE bool metadata_is_valid(ImBuf *ibuf, char *r_str, short index, int offset)
2050 {
2051         return (IMB_metadata_get_field(ibuf, meta_data_list[index], r_str + offset, MAX_METADATA_STR - offset) && r_str[0]);
2052 }
2053
2054 static void metadata_draw_imbuf(ImBuf *ibuf, rcti rect, int fontid, const bool is_top, float factor)
2055 {
2056         char temp_str[MAX_METADATA_STR];
2057         int line_width;
2058         int ofs_y = 0;
2059         short i;
2060         int len;
2061         const float height = BLF_height_max(fontid);
2062
2063         if (is_top) {
2064                 for (i = 0; i < 4; i++) {
2065                         /* first line */
2066                         if (i == 0) {
2067                                 bool do_newline = false;
2068                                 len = BLI_snprintf_rlen(temp_str, MAX_METADATA_STR, "%s: ", meta_data_list[0]);
2069                                 if (metadata_is_valid(ibuf, temp_str, 0, len)) {
2070                                         BLF_position(fontid, rect.xmin + (0.2f * U.widget_unit),
2071                                                      rect.ymax - factor * (1.5f * U.widget_unit - UI_UNIT_Y), 0.0f);
2072                                         BLF_draw(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX);
2073                                         do_newline = true;
2074                                 }
2075
2076                                 len = BLI_snprintf_rlen(temp_str, MAX_METADATA_STR, "%s: ", meta_data_list[1]);
2077                                 if (metadata_is_valid(ibuf, temp_str, 1, len)) {
2078                                         line_width = BLF_width(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX);
2079                                         BLF_position(fontid, rect.xmax - line_width - (0.2f * U.widget_unit),
2080                                                      rect.ymax - factor * (1.5f * U.widget_unit - UI_UNIT_Y), 0.0f);
2081                                         BLF_draw(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX);
2082                                         do_newline = true;
2083                                 }
2084
2085                                 if (do_newline)
2086                                         ofs_y += (height + (0.2f * U.widget_unit));
2087                         }
2088                         else if (i == 1) {
2089                                 len = BLI_snprintf_rlen(temp_str, MAX_METADATA_STR, "%s: ", meta_data_list[i + 1]);
2090                                 if (metadata_is_valid(ibuf, temp_str, i + 1, len)) {
2091                                         BLF_position(fontid, rect.xmin + (0.2f * U.widget_unit),
2092                                                      rect.ymax - factor * (1.5f * U.widget_unit - UI_UNIT_Y) - ofs_y, 0.0f);
2093                                         BLF_draw(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX);
2094                                         ofs_y += (height + (0.2f * U.widget_unit));
2095                                 }
2096                         }
2097                         else {
2098                                 len = BLI_snprintf_rlen(temp_str, MAX_METADATA_STR, "%s: ", meta_data_list[i + 1]);
2099                                 if (metadata_is_valid(ibuf, temp_str, i + 1, len)) {
2100                                         BLF_position(fontid, rect.xmax + (0.2f * U.widget_unit),
2101                                                      rect.ymax - factor * (1.5f * U.widget_unit - UI_UNIT_Y) - ofs_y, 0.0f);
2102                                         BLF_draw(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX);
2103                                         ofs_y += (height + (0.2f * U.widget_unit));
2104                                 }
2105                         }
2106                 }
2107         }
2108         else {
2109                 int ofs_x = 0;
2110                 for (i = 5; i < 10; i++) {
2111                         len = BLI_snprintf_rlen(temp_str, MAX_METADATA_STR, "%s: ", meta_data_list[i]);
2112                         if (metadata_is_valid(ibuf, temp_str, i, len)) {
2113                                 const int line_height = height;
2114                                 BLF_position(fontid, rect.xmin + (0.2f * U.widget_unit) + ofs_x,
2115                                              rect.ymin - line_height + factor * (1.5f * U.widget_unit), 0.0f);
2116                                 BLF_draw(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX);
2117
2118                                 ofs_x += BLF_width(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX) + UI_UNIT_X;
2119                         }
2120                 }
2121         }
2122 }
2123
2124 static float metadata_box_height_get(ImBuf *ibuf, int fontid, const bool is_top)
2125 {
2126         char str[MAX_METADATA_STR];
2127         float height = 0;
2128         short i;
2129
2130         if (is_top) {
2131                 for (i = 0; i < 5 ; i++) {
2132                         if (metadata_is_valid(ibuf, str, i, 0)) {
2133                                 height += BLF_height(fontid, str, strlen(str));
2134                         }
2135                 }
2136         }
2137         else {
2138                 for (i = 5; i < 10; i++) {
2139                         if (metadata_is_valid(ibuf, str, i, 0)) {
2140                                 height += BLF_height(fontid, str, strlen(str));
2141                         }
2142                 }
2143         }
2144
2145         if (height) {
2146                 return (height + (0.2f * U.widget_unit));
2147         }
2148
2149         return 0;
2150 }
2151
2152 #undef MAX_METADATA_STR
2153
2154 void ED_region_image_metadata_draw(ARegion *ar, ImBuf *ibuf, float zoomx, float zoomy)
2155 {
2156         uiStyle *style = UI_style_get_dpi();
2157         int fontid = style->widget.uifont_id;
2158         float box_y;
2159         rcti rect;
2160         int x, y;
2161
2162         if (!ibuf->metadata)
2163                 return;
2164
2165         /* find window pixel coordinates of origin */
2166         UI_view2d_view_to_region(&ar->v2d, 0.0f, 0.0f, &x, &y);
2167
2168         glPushMatrix();
2169
2170         /* offset and zoom using ogl */
2171         glTranslatef(x, y, 0.0f);
2172         glScalef(zoomx, zoomy, 1.0f);
2173
2174         BLF_size(fontid, style->widgetlabel.points, U.dpi * zoomy);
2175
2176         /* *** upper box*** */
2177
2178         /* get needed box height */
2179         box_y = metadata_box_height_get(ibuf, fontid, true);
2180
2181         if (box_y) {
2182                 UI_ThemeColor(TH_METADATA_BG);
2183
2184                 /* set up rect */
2185                 BLI_rcti_init(&rect, 0, ibuf->x, ibuf->y, ibuf->y + box_y);
2186                 /* draw top box */
2187                 glRecti(rect.xmin, rect.ymin, rect.xmax, rect.ymax);
2188
2189                 BLF_clipping(fontid, rect.xmin, rect.ymin, rect.xmax, rect.ymax);
2190                 BLF_enable(fontid, BLF_CLIPPING);
2191
2192                 UI_ThemeColor(TH_METADATA_TEXT);
2193                 metadata_draw_imbuf(ibuf, rect, fontid, true, zoomy);
2194
2195                 BLF_disable(fontid, BLF_CLIPPING);
2196         }
2197
2198
2199         /* *** lower box*** */
2200
2201         box_y = metadata_box_height_get(ibuf, fontid, false);
2202
2203         if (box_y) {
2204                 UI_ThemeColor(TH_METADATA_BG);
2205
2206                 /* set up box rect */
2207                 BLI_rcti_init(&rect, 0, ibuf->x, -box_y, 0);
2208                 /* draw top box */
2209                 glRecti(rect.xmin, rect.ymin, rect.xmax, rect.ymax);
2210
2211                 BLF_clipping(fontid, rect.xmin, rect.ymin, rect.xmax, rect.ymax);
2212                 BLF_enable(fontid, BLF_CLIPPING);
2213
2214                 UI_ThemeColor(TH_METADATA_TEXT);
2215                 metadata_draw_imbuf(ibuf, rect, fontid, false, zoomy);
2216
2217                 BLF_disable(fontid, BLF_CLIPPING);
2218         }
2219
2220         glPopMatrix();
2221 }
2222
2223 void ED_region_grid_draw(ARegion *ar, float zoomx, float zoomy)
2224 {
2225         float gridsize, gridstep = 1.0f / 32.0f;
2226         float fac, blendfac;
2227         int x1, y1, x2, y2;
2228
2229         /* the image is located inside (0, 0), (1, 1) as set by view2d */
2230         UI_ThemeColorShade(TH_BACK, 20);
2231
2232         UI_view2d_view_to_region(&ar->v2d, 0.0f, 0.0f, &x1, &y1);
2233         UI_view2d_view_to_region(&ar->v2d, 1.0f, 1.0f, &x2, &y2);
2234         glRectf(x1, y1, x2, y2);
2235
2236         /* gridsize adapted to zoom level */
2237         gridsize = 0.5f * (zoomx + zoomy);
2238         if (gridsize <= 0.0f)
2239                 return;
2240
2241         if (gridsize < 1.0f) {
2242                 while (gridsize < 1.0f) {
2243                         gridsize *= 4.0f;
2244                         gridstep *= 4.0f;
2245                 }
2246         }
2247         else {
2248                 while (gridsize >= 4.0f) {
2249                         gridsize /= 4.0f;
2250                         gridstep /= 4.0f;
2251                 }
2252         }
2253
2254         /* the fine resolution level */
2255         blendfac = 0.25f * gridsize - floorf(0.25f * gridsize);
2256         CLAMP(blendfac, 0.0f, 1.0f);
2257         UI_ThemeColorShade(TH_BACK, (int)(20.0f * (1.0f - blendfac)));
2258
2259         fac = 0.0f;
2260         glBegin(GL_LINES);
2261         while (fac < 1.0f) {
2262                 glVertex2f(x1, y1 * (1.0f - fac) + y2 * fac);
2263                 glVertex2f(x2, y1 * (1.0f - fac) + y2 * fac);
2264                 glVertex2f(x1 * (1.0f - fac) + x2 * fac, y1);
2265                 glVertex2f(x1 * (1.0f - fac) + x2 * fac, y2);
2266                 fac += gridstep;
2267         }
2268
2269         /* the large resolution level */
2270         UI_ThemeColor(TH_BACK);
2271
2272         fac = 0.0f;
2273         while (fac < 1.0f) {
2274                 glVertex2f(x1, y1 * (1.0f - fac) + y2 * fac);
2275                 glVertex2f(x2, y1 * (1.0f - fac) + y2 * fac);
2276                 glVertex2f(x1 * (1.0f - fac) + x2 * fac, y1);
2277                 glVertex2f(x1 * (1.0f - fac) + x2 * fac, y2);
2278                 fac += 4.0f * gridstep;
2279         }
2280         glEnd();
2281 }
2282
2283 /* If the area has overlapping regions, it returns visible rect for Region *ar */
2284 /* rect gets returned in local region coordinates */
2285 void ED_region_visible_rect(ARegion *ar, rcti *rect)
2286 {
2287         ARegion *arn = ar;
2288
2289         /* allow function to be called without area */
2290         while (arn->prev)
2291                 arn = arn->prev;
2292
2293         *rect = ar->winrct;
2294
2295         /* check if a region overlaps with the current one */
2296         for (; arn; arn = arn->next) {
2297                 if (ar != arn && arn->overlap) {
2298                         if (BLI_rcti_isect(rect, &arn->winrct, NULL)) {
2299
2300                                 /* overlap left, also check 1 pixel offset (2 regions on one side) */
2301                                 if (ABS(rect->xmin - arn->winrct.xmin) < 2)
2302                                         rect->xmin = arn->winrct.xmax;
2303
2304                                 /* overlap right */
2305                                 if (ABS(rect->xmax - arn->winrct.xmax) < 2)
2306                                         rect->xmax = arn->winrct.xmin;
2307                         }
2308                 }
2309         }
2310         BLI_rcti_translate(rect, -ar->winrct.xmin, -ar->winrct.ymin);
2311 }
2312
2313 /* Cache display helpers */
2314
2315 void ED_region_cache_draw_background(const ARegion *ar)
2316 {
2317         glColor4ub(128, 128, 255, 64);
2318         glRecti(0, 0, ar->winx, 8 * UI_DPI_FAC);
2319 }
2320
2321 void ED_region_cache_draw_curfra_label(const int framenr, const float x, const float y)
2322 {
2323         uiStyle *style = UI_style_get();
2324         int fontid = style->widget.uifont_id;
2325         char numstr[32];
2326         float font_dims[2] = {0.0f, 0.0f};
2327
2328         /* frame number */
2329         BLF_size(fontid, 11.0f * U.pixelsize, U.dpi);
2330         BLI_snprintf(numstr, sizeof(numstr), "%d", framenr);
2331
2332         BLF_width_and_height(fontid, numstr, sizeof(numstr), &font_dims[0], &font_dims[1]);
2333
2334         glRecti(x, y, x + font_dims[0] + 6.0f, y + font_dims[1] + 4.0f);
2335
2336         UI_ThemeColor(TH_TEXT);
2337         BLF_position(fontid, x + 2.0f, y + 2.0f, 0.0f);
2338         BLF_draw(fontid, numstr, sizeof(numstr));
2339 }
2340
2341 void ED_region_cache_draw_cached_segments(const ARegion *ar, const int num_segments, const int *points, const int sfra, const int efra)
2342 {
2343         if (num_segments) {
2344                 int a;
2345
2346                 glColor4ub(128, 128, 255, 128);
2347
2348                 for (a = 0; a < num_segments; a++) {
2349                         float x1, x2;
2350
2351                         x1 = (float)(points[a * 2] - sfra) / (efra - sfra + 1) * ar->winx;
2352                         x2 = (float)(points[a * 2 + 1] - sfra + 1) / (efra - sfra + 1) * ar->winx;
2353
2354                         glRecti(x1, 0, x2, 8 * UI_DPI_FAC);
2355                 }
2356         }
2357 }