source/blender/editors/interface/interface_panel.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) 2001-2002 by NaN Holding BV.
  19  * All rights reserved.
  20  *
  21  * Contributor(s): Blender Foundation, 2003-2009 full recode.
  22  *
  23  * ***** END GPL LICENSE BLOCK *****
  24  */
  25
  26 /** \file blender/editors/interface/interface_panel.c
  27  *  \ingroup edinterface
  28  */
  29
  30
  31 /* a full doc with API notes can be found in bf-blender/trunk/blender/doc/guides/interface_API.txt */
  32
  33 #include <math.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <ctype.h>
  37
  38 #include "MEM_guardedalloc.h"
  39
  40 #include "PIL_time.h"
  41
  42 #include "BLI_blenlib.h"
  43 #include "BLI_math.h"
  44 #include "BLI_utildefines.h"
  45
  46 #include "BLF_translation.h"
  47
  48 #include "DNA_userdef_types.h"
  49
  50 #include "BKE_context.h"
  51 #include "BKE_screen.h"
  52
  53 #include "BIF_gl.h"
  54 #include "BIF_glutil.h"
  55
  56 #include "WM_api.h"
  57 #include "WM_types.h"
  58
  59 #include "ED_screen.h"
  60
  61 #include "UI_interface.h"
  62 #include "UI_resources.h"
  63
  64 #include "interface_intern.h"
  65
  66 /*********************** defines and structs ************************/
  67
  68 #define ANIMATION_TIME          0.30
  69 #define ANIMATION_INTERVAL      0.02
  70
  71 #define PNL_LAST_ADDED          1
  72 #define PNL_ACTIVE                      2
  73 #define PNL_WAS_ACTIVE          4
  74 #define PNL_ANIM_ALIGN          8
  75 #define PNL_NEW_ADDED           16
  76 #define PNL_FIRST                       32
  77
  78 typedef enum uiHandlePanelState {
  79         PANEL_STATE_DRAG,
  80         PANEL_STATE_DRAG_SCALE,
  81         PANEL_STATE_WAIT_UNTAB,
  82         PANEL_STATE_ANIMATION,
  83         PANEL_STATE_EXIT
  84 } uiHandlePanelState;
  85
  86 typedef struct uiHandlePanelData {
  87         uiHandlePanelState state;
  88
  89         /* animation */
  90         wmTimer *animtimer;
  91         double starttime;
  92
  93         /* dragging */
  94         int startx, starty;
  95         int startofsx, startofsy;
  96         int startsizex, startsizey;
  97 } uiHandlePanelData;
  98
  99 static void panel_activate_state(const bContext *C, Panel *pa, uiHandlePanelState state);
 100
 101 /*********************** space specific code ************************/
 102 /* temporary code to remove all sbuts stuff from panel code         */
 103
 104 static int panel_aligned(ScrArea *sa, ARegion *ar)
 105 {
 106         if(sa->spacetype==SPACE_BUTS && ar->regiontype == RGN_TYPE_WINDOW) {
 107                 SpaceButs *sbuts= sa->spacedata.first;
 108                 return sbuts->align;
 109         }
 110         else if(sa->spacetype==SPACE_USERPREF && ar->regiontype == RGN_TYPE_WINDOW)
 111                 return BUT_VERTICAL;
 112         else if(sa->spacetype==SPACE_FILE && ar->regiontype == RGN_TYPE_CHANNELS)
 113                 return BUT_VERTICAL;
 114         else if(sa->spacetype==SPACE_IMAGE && ar->regiontype == RGN_TYPE_PREVIEW)
 115                 return BUT_VERTICAL;
 116         else if(ELEM3(ar->regiontype, RGN_TYPE_UI, RGN_TYPE_TOOLS, RGN_TYPE_TOOL_PROPS))
 117                 return BUT_VERTICAL;
 118
 119         return 0;
 120 }
 121
 122 static int panels_re_align(ScrArea *sa, ARegion *ar, Panel **r_pa)
 123 {
 124         Panel *pa;
 125         int active= 0;
 126
 127         *r_pa= NULL;
 128
 129         if(sa->spacetype==SPACE_BUTS && ar->regiontype == RGN_TYPE_WINDOW) {
 130                 SpaceButs *sbuts= sa->spacedata.first;
 131
 132                 if(sbuts->align)
 133                         if(sbuts->re_align || sbuts->mainbo!=sbuts->mainb)
 134                                 return 1;
 135         }
 136         else if(ar->regiontype==RGN_TYPE_UI)
 137                 return 1;
 138         else if(sa->spacetype==SPACE_IMAGE && ar->regiontype == RGN_TYPE_PREVIEW)
 139                 return 1;
 140         else if(sa->spacetype==SPACE_FILE && ar->regiontype == RGN_TYPE_CHANNELS)
 141                 return 1;
 142
 143         /* in case panel is added or disappears */
 144         for(pa=ar->panels.first; pa; pa=pa->next) {
 145                 if((pa->runtime_flag & PNL_WAS_ACTIVE) && !(pa->runtime_flag & PNL_ACTIVE))
 146                         return 1;
 147                 if(!(pa->runtime_flag & PNL_WAS_ACTIVE) && (pa->runtime_flag & PNL_ACTIVE))
 148                         return 1;
 149                 if(pa->activedata)
 150                         active= 1;
 151         }
 152
 153         /* in case we need to do an animation (size changes) */
 154         for(pa=ar->panels.first; pa; pa=pa->next) {
 155                 if(pa->runtime_flag & PNL_ANIM_ALIGN) {
 156                         if(!active)
 157                                 *r_pa= pa;
 158                         return 1;
 159                 }
 160         }
 161
 162         return 0;
 163 }
 164
 165 /****************************** panels ******************************/
 166
 167 static void ui_panel_copy_offset(Panel *pa, Panel *papar)
 168 {
 169         /* with respect to sizes... papar is parent */
 170
 171         pa->ofsx= papar->ofsx;
 172         pa->ofsy= papar->ofsy + papar->sizey-pa->sizey;
 173 }
 174
 175 Panel *uiBeginPanel(ScrArea *sa, ARegion *ar, uiBlock *block, PanelType *pt, int *open)
 176 {
 177         Panel *pa, *patab, *palast, *panext;
 178         char *drawname= pt->label;
 179         char *idname= pt->idname;
 180         char *tabname= pt->idname;
 181         char *hookname= NULL;
 182         int newpanel;
 183         int align= panel_aligned(sa, ar);
 184
 185         /* check if Panel exists, then use that one */
 186         for(pa=ar->panels.first; pa; pa=pa->next)
 187                 if(strncmp(pa->panelname, idname, UI_MAX_NAME_STR)==0)
 188                         if(strncmp(pa->tabname, tabname, UI_MAX_NAME_STR)==0)
 189                                 break;
 190
 191         newpanel= (pa == NULL);
 192
 193         if(!newpanel) {
 194                 pa->type= pt;
 195         }
 196         else {
 197                 /* new panel */
 198                 pa= MEM_callocN(sizeof(Panel), "new panel");
 199                 pa->type= pt;
 200                 BLI_strncpy(pa->panelname, idname, UI_MAX_NAME_STR);
 201                 BLI_strncpy(pa->tabname, tabname, UI_MAX_NAME_STR);
 202
 203                 if(pt->flag & PNL_DEFAULT_CLOSED) {
 204                         if(align == BUT_VERTICAL)
 205                                 pa->flag |= PNL_CLOSEDY;
 206                         else
 207                                 pa->flag |= PNL_CLOSEDX;
 208                 }
 209
 210                 pa->ofsx= 0;
 211                 pa->ofsy= 0;
 212                 pa->sizex= 0;
 213                 pa->sizey= 0;
 214                 pa->runtime_flag |= PNL_NEW_ADDED;
 215
 216                 BLI_addtail(&ar->panels, pa);
 217
 218                 /* make new Panel tabbed? */
 219                 if(hookname) {
 220                         for(patab= ar->panels.first; patab; patab= patab->next) {
 221                                 if((patab->runtime_flag & PNL_ACTIVE) && patab->paneltab==NULL) {
 222                                         if(strncmp(hookname, patab->panelname, UI_MAX_NAME_STR)==0) {
 223                                                 if(strncmp(tabname, patab->tabname, UI_MAX_NAME_STR)==0) {
 224                                                         pa->paneltab= patab;
 225                                                         ui_panel_copy_offset(pa, patab);
 226                                                         break;
 227                                                 }
 228                                         }
 229                                 }
 230                         }
 231                 }
 232         }
 233
 234         BLI_strncpy(pa->drawname, drawname, UI_MAX_NAME_STR);
 235
 236         /* if a new panel is added, we insert it right after the panel
 237          * that was last added. this way new panels are inserted in the
 238          * right place between versions */
 239         for(palast=ar->panels.first; palast; palast=palast->next)
 240                 if(palast->runtime_flag & PNL_LAST_ADDED)
 241                         break;
 242
 243         if(newpanel) {
 244                 pa->sortorder= (palast)? palast->sortorder+1: 0;
 245
 246                 for(panext=ar->panels.first; panext; panext=panext->next)
 247                         if(panext != pa && panext->sortorder >= pa->sortorder)
 248                                 panext->sortorder++;
 249         }
 250
 251         if(palast)
 252                 palast->runtime_flag &= ~PNL_LAST_ADDED;
 253
 254         /* assign to block */
 255         block->panel= pa;
 256         pa->runtime_flag |= PNL_ACTIVE|PNL_LAST_ADDED;
 257
 258         *open= 0;
 259
 260         if(pa->paneltab) return pa;
 261         if(pa->flag & PNL_CLOSED) return pa;
 262
 263         *open= 1;
 264
 265         return pa;
 266 }
 267
 268 void uiEndPanel(uiBlock *block, int width, int height)
 269 {
 270         Panel *pa= block->panel;
 271
 272         if(pa->runtime_flag & PNL_NEW_ADDED) {
 273                 pa->runtime_flag &= ~PNL_NEW_ADDED;
 274                 pa->sizex= width;
 275                 pa->sizey= height;
 276         }
 277         else {
 278                 /* check if we need to do an animation */
 279                 if(!ELEM(width, 0, pa->sizex) || !ELEM(height, 0, pa->sizey)) {
 280                         pa->runtime_flag |= PNL_ANIM_ALIGN;
 281                         if(height != 0)
 282                                 pa->ofsy += pa->sizey-height;
 283                 }
 284
 285                 /* update width/height if non-zero */
 286                 if(width != 0)
 287                         pa->sizex= width;
 288                 if(height != 0)
 289                         pa->sizey= height;
 290         }
 291 }
 292
 293 static void ui_offset_panel_block(uiBlock *block)
 294 {
 295         uiStyle *style= UI_GetStyle();
 296         uiBut *but;
 297         int ofsy;
 298
 299         /* compute bounds and offset */
 300         ui_bounds_block(block);
 301
 302         ofsy= block->panel->sizey - style->panelspace;
 303
 304         for(but= block->buttons.first; but; but=but->next) {
 305                 but->y1 += ofsy;
 306                 but->y2 += ofsy;
 307         }
 308
 309         block->maxx= block->panel->sizex;
 310         block->maxy= block->panel->sizey;
 311         block->minx= block->miny= 0.0;
 312 }
 313
 314 /**************************** drawing *******************************/
 315
 316 /* extern used by previewrender */
 317 #if 0 /*UNUSED 2.5*/
 318 static void uiPanelPush(uiBlock *block)
 319 {
 320         glPushMatrix();
 321
 322         if(block->panel)
 323                 glTranslatef((float)block->panel->ofsx, (float)block->panel->ofsy, 0.0);
 324 }
 325
 326 static void uiPanelPop(uiBlock *UNUSED(block))
 327 {
 328         glPopMatrix();
 329 }
 330 #endif
 331
 332 /* triangle 'icon' for panel header */
 333 void UI_DrawTriIcon(float x, float y, char dir)
 334 {
 335         if(dir=='h') {
 336                 ui_draw_anti_tria( x-3, y-5, x-3, y+5, x+7,y );
 337         }
 338         else if(dir=='t') {
 339                 ui_draw_anti_tria( x-5, y-7, x+5, y-7, x, y+3);
 340         }
 341         else { /* 'v' = vertical, down */
 342                 ui_draw_anti_tria( x-5, y+3, x+5, y+3, x, y-7);
 343         }
 344 }
 345
 346 /* triangle 'icon' inside rect */
 347 static void ui_draw_tria_rect(rctf *rect, char dir)
 348 {
 349         if(dir=='h') {
 350                 float half= 0.5f*(rect->ymax - rect->ymin);
 351                 ui_draw_anti_tria(rect->xmin, rect->ymin, rect->xmin, rect->ymax, rect->xmax, rect->ymin+half);
 352         }
 353         else {
 354                 float half= 0.5f*(rect->xmax - rect->xmin);
 355                 ui_draw_anti_tria(rect->xmin, rect->ymax, rect->xmax, rect->ymax, rect->xmin+half, rect->ymin);
 356         }
 357 }
 358
 359 static void ui_draw_anti_x(float x1, float y1, float x2, float y2)
 360 {
 361
 362         /* set antialias line */
 363         glEnable(GL_LINE_SMOOTH);
 364         glEnable(GL_BLEND);
 365
 366         glLineWidth(2.0);
 367
 368         fdrawline(x1, y1, x2, y2);
 369         fdrawline(x1, y2, x2, y1);
 370
 371         glLineWidth(1.0);
 372
 373         glDisable(GL_LINE_SMOOTH);
 374         glDisable(GL_BLEND);
 375
 376 }
 377
 378 /* x 'icon' for panel header */
 379 static void ui_draw_x_icon(float x, float y)
 380 {
 381
 382         ui_draw_anti_x(x, y, x+9.375f, y+9.375f);
 383
 384 }
 385
 386 #define PNL_ICON        UI_UNIT_X  /* could be UI_UNIT_Y too */
 387
 388 static void ui_draw_panel_scalewidget(rcti *rect)
 389 {
 390         float xmin, xmax, dx;
 391         float ymin, ymax, dy;
 392
 393         xmin= rect->xmax-PNL_HEADER+2;
 394         xmax= rect->xmax-3;
 395         ymin= rect->ymin+3;
 396         ymax= rect->ymin+PNL_HEADER-2;
 397
 398         dx= 0.5f*(xmax-xmin);
 399         dy= 0.5f*(ymax-ymin);
 400
 401         glEnable(GL_BLEND);
 402         glColor4ub(255, 255, 255, 50);
 403         fdrawline(xmin, ymin, xmax, ymax);
 404         fdrawline(xmin+dx, ymin, xmax, ymax-dy);
 405
 406         glColor4ub(0, 0, 0, 50);
 407         fdrawline(xmin, ymin+1, xmax, ymax+1);
 408         fdrawline(xmin+dx, ymin+1, xmax, ymax-dy+1);
 409         glDisable(GL_BLEND);
 410 }
 411
 412 static void ui_draw_panel_dragwidget(rctf *rect)
 413 {
 414         float xmin, xmax, dx;
 415         float ymin, ymax, dy;
 416
 417         xmin= rect->xmin;
 418         xmax= rect->xmax;
 419         ymin= rect->ymin;
 420         ymax= rect->ymax;
 421
 422         dx= 0.333f*(xmax-xmin);
 423         dy= 0.333f*(ymax-ymin);
 424
 425         glEnable(GL_BLEND);
 426         glColor4ub(255, 255, 255, 50);
 427         fdrawline(xmin, ymax, xmax, ymin);
 428         fdrawline(xmin+dx, ymax, xmax, ymin+dy);
 429         fdrawline(xmin+2*dx, ymax, xmax, ymin+2*dy);
 430
 431         glColor4ub(0, 0, 0, 50);
 432         fdrawline(xmin, ymax+1, xmax, ymin+1);
 433         fdrawline(xmin+dx, ymax+1, xmax, ymin+dy+1);
 434         fdrawline(xmin+2*dx, ymax+1, xmax, ymin+2*dy+1);
 435         glDisable(GL_BLEND);
 436 }
 437
 438
 439 static void ui_draw_aligned_panel_header(uiStyle *style, uiBlock *block, rcti *rect, char dir)
 440 {
 441         Panel *panel= block->panel;
 442         rcti hrect;
 443         int  pnl_icons;
 444         const char *activename = IFACE_(panel->drawname[0] ? panel->drawname : panel->panelname);
 445
 446         /* + 0.001f to avoid flirting with float inaccuracy */
 447         if(panel->control & UI_PNL_CLOSE) pnl_icons=(panel->labelofs+2*PNL_ICON+5)/block->aspect + 0.001f;
 448         else pnl_icons= (panel->labelofs+PNL_ICON+5)/block->aspect + 0.001f;
 449
 450         /* active tab */
 451         /* draw text label */
 452         UI_ThemeColor(TH_TITLE);
 453
 454         hrect= *rect;
 455         if(dir == 'h') {
 456                 hrect.xmin = rect->xmin+pnl_icons;
 457                 hrect.ymin += 2.0f/block->aspect;
 458                 uiStyleFontDraw(&style->paneltitle, &hrect, activename);
 459         }
 460         else {
 461                 /* ignore 'pnl_icons', otherwise the text gets offset horizontally
 462                  * + 0.001f to avoid flirting with float inaccuracy
 463                  */
 464                 hrect.xmin = rect->xmin + (PNL_ICON+5)/block->aspect + 0.001f;
 465                 uiStyleFontDrawRotated(&style->paneltitle, &hrect, activename);
 466         }
 467 }
 468
 469 static void rectf_scale(rctf *rect, float scale)
 470 {
 471         float centx= 0.5f*(rect->xmin+rect->xmax);
 472         float centy= 0.5f*(rect->ymin+rect->ymax);
 473         float sizex= 0.5f*scale*(rect->xmax - rect->xmin);
 474         float sizey= 0.5f*scale*(rect->ymax - rect->ymin);
 475
 476         rect->xmin = centx - sizex;
 477         rect->xmax = centx + sizex;
 478         rect->ymin = centy - sizey;
 479         rect->ymax = centy + sizey;
 480 }
 481
 482 /* panel integrated in buttonswindow, tool/property lists etc */
 483 void ui_draw_aligned_panel(uiStyle *style, uiBlock *block, rcti *rect)
 484 {
 485         bTheme *btheme= UI_GetTheme();
 486         Panel *panel= block->panel;
 487         rcti headrect;
 488         rctf itemrect;
 489         int ofsx;
 490
 491         if(panel->paneltab) return;
 492         if(panel->type && (panel->type->flag & PNL_NO_HEADER)) return;
 493
 494         /* calculate header rect */
 495         /* + 0.001f to prevent flicker due to float inaccuracy */
 496         headrect= *rect;
 497         headrect.ymin = headrect.ymax;
 498         headrect.ymax = headrect.ymin + floor(PNL_HEADER/block->aspect + 0.001f);
 499
 500         {
 501                 float minx= rect->xmin;
 502                 float maxx= rect->xmax;
 503                 float y= headrect.ymax;
 504
 505                 glEnable(GL_BLEND);
 506
 507                 if(btheme->tui.panel.show_header) {
 508                         /* draw with background color */
 509                         glEnable(GL_BLEND);
 510                         glColor4ubv((unsigned char*)btheme->tui.panel.header);
 511                         glRectf(minx, headrect.ymin+1, maxx, y);
 512
 513                         fdrawline(minx, y, maxx, y);
 514                         fdrawline(minx, y, maxx, y);
 515                 }
 516                 else if(!(panel->runtime_flag & PNL_FIRST)) {
 517                         /* draw embossed separator */
 518                         minx += 5.0f/block->aspect;
 519                         maxx -= 5.0f/block->aspect;
 520
 521                         glColor4f(0.0f, 0.0f, 0.0f, 0.5f);
 522                         fdrawline(minx, y, maxx, y);
 523                         glColor4f(1.0f, 1.0f, 1.0f, 0.25f);
 524                         fdrawline(minx, y-1, maxx, y-1);
 525                         glDisable(GL_BLEND);
 526                 }
 527
 528                 glDisable(GL_BLEND);
 529         }
 530
 531         /* horizontal title */
 532         if(!(panel->flag & PNL_CLOSEDX)) {
 533                 ui_draw_aligned_panel_header(style, block, &headrect, 'h');
 534
 535                 /* itemrect smaller */
 536                 itemrect.xmax = headrect.xmax - 5.0f/block->aspect;
 537                 itemrect.xmin = itemrect.xmax - (headrect.ymax-headrect.ymin);
 538                 itemrect.ymin = headrect.ymin;
 539                 itemrect.ymax = headrect.ymax;
 540
 541                 rectf_scale(&itemrect, 0.7f);
 542                 ui_draw_panel_dragwidget(&itemrect);
 543         }
 544
 545         /* if the panel is minimized vertically:
 546          * (------)
 547          */
 548         if(panel->flag & PNL_CLOSEDY) {
 549
 550         }
 551         else if(panel->flag & PNL_CLOSEDX) {
 552                 /* draw vertical title */
 553                 ui_draw_aligned_panel_header(style, block, &headrect, 'v');
 554         }
 555         /* an open panel */
 556         else {
 557
 558                 /* in some occasions, draw a border */
 559                 if(panel->flag & PNL_SELECT) {
 560                         if(panel->control & UI_PNL_SOLID) uiSetRoundBox(UI_CNR_ALL);
 561                         else uiSetRoundBox(UI_CNR_NONE);
 562
 563                         UI_ThemeColorShade(TH_BACK, -120);
 564                         uiRoundRect(0.5f + rect->xmin, 0.5f + rect->ymin, 0.5f + rect->xmax, 0.5f + headrect.ymax+1, 8);
 565                 }
 566
 567                 if(panel->control & UI_PNL_SCALE)
 568                         ui_draw_panel_scalewidget(rect);
 569         }
 570
 571         /* draw optional close icon */
 572
 573         ofsx= 6;
 574         if(panel->control & UI_PNL_CLOSE) {
 575
 576                 UI_ThemeColor(TH_TEXT);
 577                 ui_draw_x_icon(rect->xmin+2+ofsx, rect->ymax+2);
 578                 ofsx= 22;
 579         }
 580
 581         /* draw collapse icon */
 582         UI_ThemeColor(TH_TEXT);
 583
 584         /* itemrect smaller */
 585         itemrect.xmin = headrect.xmin + 5.0f/block->aspect;
 586         itemrect.xmax = itemrect.xmin + (headrect.ymax-headrect.ymin);
 587         itemrect.ymin = headrect.ymin;
 588         itemrect.ymax = headrect.ymax;
 589
 590         rectf_scale(&itemrect, 0.35f);
 591
 592         if(panel->flag & PNL_CLOSEDY)
 593                 ui_draw_tria_rect(&itemrect, 'h');
 594         else if(panel->flag & PNL_CLOSEDX)
 595                 ui_draw_tria_rect(&itemrect, 'h');
 596         else
 597                 ui_draw_tria_rect(&itemrect, 'v');
 598
 599         (void)ofsx;
 600 }
 601
 602 /************************** panel alignment *************************/
 603
 604 static int get_panel_header(Panel *pa)
 605 {
 606         if(pa->type && (pa->type->flag & PNL_NO_HEADER))
 607                 return 0;
 608
 609         return PNL_HEADER;
 610 }
 611
 612 static int get_panel_size_y(Panel *pa)
 613 {
 614         if(pa->type && (pa->type->flag & PNL_NO_HEADER))
 615                 return pa->sizey;
 616
 617         return PNL_HEADER + pa->sizey;
 618 }
 619
 620 /* this function is needed because uiBlock and Panel itself don't
 621  * change sizey or location when closed */
 622 static int get_panel_real_ofsy(Panel *pa)
 623 {
 624         if(pa->flag & PNL_CLOSEDY) return pa->ofsy+pa->sizey;
 625         else if(pa->paneltab && (pa->paneltab->flag & PNL_CLOSEDY)) return pa->ofsy+pa->sizey;
 626         else if(pa->paneltab) return pa->paneltab->ofsy;
 627         else return pa->ofsy;
 628 }
 629
 630 static int get_panel_real_ofsx(Panel *pa)
 631 {
 632         if(pa->flag & PNL_CLOSEDX) return pa->ofsx+get_panel_header(pa);
 633         else if(pa->paneltab && (pa->paneltab->flag & PNL_CLOSEDX)) return pa->ofsx+get_panel_header(pa);
 634         else return pa->ofsx+pa->sizex;
 635 }
 636
 637 typedef struct PanelSort {
 638         Panel *pa, *orig;
 639 } PanelSort;
 640
 641 /* note about sorting;
 642  * the sortorder has a lower value for new panels being added.
 643  * however, that only works to insert a single panel, when more new panels get
 644  * added the coordinates of existing panels and the previously stored to-be-inserted
 645  * panels do not match for sorting */
 646
 647 static int find_leftmost_panel(const void *a1, const void *a2)
 648 {
 649         const PanelSort *ps1=a1, *ps2=a2;
 650
 651         if(ps1->pa->ofsx > ps2->pa->ofsx) return 1;
 652         else if(ps1->pa->ofsx < ps2->pa->ofsx) return -1;
 653         else if(ps1->pa->sortorder > ps2->pa->sortorder) return 1;
 654         else if(ps1->pa->sortorder < ps2->pa->sortorder) return -1;
 655
 656         return 0;
 657 }
 658
 659
 660 static int find_highest_panel(const void *a1, const void *a2)
 661 {
 662         const PanelSort *ps1=a1, *ps2=a2;
 663
 664         /* stick uppermost header-less panels to the top of the region -
 665          * prevent them from being sorted */
 666         if (ps1->pa->sortorder < ps2->pa->sortorder && ps1->pa->type->flag & PNL_NO_HEADER) return -1;
 667
 668         if(ps1->pa->ofsy+ps1->pa->sizey < ps2->pa->ofsy+ps2->pa->sizey) return 1;
 669         else if(ps1->pa->ofsy+ps1->pa->sizey > ps2->pa->ofsy+ps2->pa->sizey) return -1;
 670         else if(ps1->pa->sortorder > ps2->pa->sortorder) return 1;
 671         else if(ps1->pa->sortorder < ps2->pa->sortorder) return -1;
 672
 673         return 0;
 674 }
 675
 676 static int compare_panel(const void *a1, const void *a2)
 677 {
 678         const PanelSort *ps1=a1, *ps2=a2;
 679
 680         if(ps1->pa->sortorder > ps2->pa->sortorder) return 1;
 681         else if(ps1->pa->sortorder < ps2->pa->sortorder) return -1;
 682
 683         return 0;
 684 }
 685
 686 /* this doesnt draw */
 687 /* returns 1 when it did something */
 688 static int uiAlignPanelStep(ScrArea *sa, ARegion *ar, float fac, int drag)
 689 {
 690         Panel *pa;
 691         PanelSort *ps, *panelsort, *psnext;
 692         int a, tot=0, done;
 693         int align= panel_aligned(sa, ar);
 694
 695         /* count active, not tabbed panels */
 696         for(pa= ar->panels.first; pa; pa= pa->next)
 697                 if((pa->runtime_flag & PNL_ACTIVE) && pa->paneltab==NULL)
 698                         tot++;
 699
 700         if(tot==0) return 0;
 701
 702         /* extra; change close direction? */
 703         for(pa= ar->panels.first; pa; pa= pa->next) {
 704                 if((pa->runtime_flag & PNL_ACTIVE) && pa->paneltab==NULL) {
 705                         if((pa->flag & PNL_CLOSEDX) && (align==BUT_VERTICAL))
 706                                 pa->flag ^= PNL_CLOSED;
 707                         else if((pa->flag & PNL_CLOSEDY) && (align==BUT_HORIZONTAL))
 708                                 pa->flag ^= PNL_CLOSED;
 709                 }
 710         }
 711
 712         /* sort panels */
 713         panelsort= MEM_callocN(tot*sizeof(PanelSort), "panelsort");
 714
 715         ps= panelsort;
 716         for(pa= ar->panels.first; pa; pa= pa->next) {
 717                 if((pa->runtime_flag & PNL_ACTIVE) && pa->paneltab==NULL) {
 718                         ps->pa= MEM_dupallocN(pa);
 719                         ps->orig= pa;
 720                         ps++;
 721                 }
 722         }
 723
 724         if(drag) {
 725                 /* while we are dragging, we sort on location and update sortorder */
 726                 if(align==BUT_VERTICAL)
 727                         qsort(panelsort, tot, sizeof(PanelSort), find_highest_panel);
 728                 else
 729                         qsort(panelsort, tot, sizeof(PanelSort), find_leftmost_panel);
 730
 731                 for(ps=panelsort, a=0; a<tot; a++, ps++)
 732                         ps->orig->sortorder= a;
 733         }
 734         else
 735                 /* otherwise use sortorder */
 736                 qsort(panelsort, tot, sizeof(PanelSort), compare_panel);
 737
 738         /* no smart other default start loc! this keeps switching f5/f6/etc compatible */
 739         ps= panelsort;
 740         ps->pa->ofsx= 0;
 741         ps->pa->ofsy= -get_panel_size_y(ps->pa);
 742
 743         for(a=0; a<tot-1; a++, ps++) {
 744                 psnext= ps+1;
 745
 746                 if(align==BUT_VERTICAL) {
 747                         psnext->pa->ofsx= ps->pa->ofsx;
 748                         psnext->pa->ofsy= get_panel_real_ofsy(ps->pa) - get_panel_size_y(psnext->pa);
 749                 }
 750                 else {
 751                         psnext->pa->ofsx= get_panel_real_ofsx(ps->pa);
 752                         psnext->pa->ofsy= ps->pa->ofsy + get_panel_size_y(ps->pa) - get_panel_size_y(psnext->pa);
 753                 }
 754         }
 755
 756         /* we interpolate */
 757         done= 0;
 758         ps= panelsort;
 759         for(a=0; a<tot; a++, ps++) {
 760                 if((ps->pa->flag & PNL_SELECT)==0) {
 761                         if((ps->orig->ofsx != ps->pa->ofsx) || (ps->orig->ofsy != ps->pa->ofsy)) {
 762                                 ps->orig->ofsx= floorf(0.5f + fac*(float)ps->pa->ofsx + (1.0f-fac)*(float)ps->orig->ofsx);
 763                                 ps->orig->ofsy= floorf(0.5f + fac*(float)ps->pa->ofsy + (1.0f-fac)*(float)ps->orig->ofsy);
 764                                 done= 1;
 765                         }
 766                 }
 767         }
 768
 769         /* copy locations to tabs */
 770         for(pa= ar->panels.first; pa; pa= pa->next)
 771                 if(pa->paneltab && (pa->runtime_flag & PNL_ACTIVE))
 772                         ui_panel_copy_offset(pa, pa->paneltab);
 773
 774         /* free panelsort array */
 775         for (ps = panelsort, a = 0; a < tot; a++, ps++) {
 776                 MEM_freeN(ps->pa);
 777         }
 778         MEM_freeN(panelsort);
 779
 780         return done;
 781 }
 782
 783 static void ui_panels_size(ScrArea *sa, ARegion *ar, int *x, int *y)
 784 {
 785         Panel *pa;
 786         int align= panel_aligned(sa, ar);
 787         int sizex = UI_PANEL_WIDTH;
 788         int sizey = UI_PANEL_WIDTH;
 789
 790         /* compute size taken up by panels, for setting in view2d */
 791         for(pa= ar->panels.first; pa; pa= pa->next) {
 792                 if(pa->runtime_flag & PNL_ACTIVE) {
 793                         int pa_sizex, pa_sizey;
 794
 795                         if(align==BUT_VERTICAL) {
 796                                 pa_sizex= pa->ofsx + pa->sizex;
 797                                 pa_sizey= get_panel_real_ofsy(pa);
 798                         }
 799                         else {
 800                                 pa_sizex= get_panel_real_ofsx(pa) + pa->sizex;
 801                                 pa_sizey= pa->ofsy + get_panel_size_y(pa);
 802                         }
 803
 804                         sizex= MAX2(sizex, pa_sizex);
 805                         sizey= MIN2(sizey, pa_sizey);
 806                 }
 807         }
 808
 809         *x= sizex;
 810         *y= sizey;
 811 }
 812
 813 static void ui_do_animate(const bContext *C, Panel *panel)
 814 {
 815         uiHandlePanelData *data= panel->activedata;
 816         ScrArea *sa= CTX_wm_area(C);
 817         ARegion *ar= CTX_wm_region(C);
 818         float fac;
 819
 820         fac= (PIL_check_seconds_timer()-data->starttime)/ANIMATION_TIME;
 821         fac= sqrt(fac);
 822         fac= MIN2(fac, 1.0f);
 823
 824         /* for max 1 second, interpolate positions */
 825         if(uiAlignPanelStep(sa, ar, fac, 0))
 826                 ED_region_tag_redraw(ar);
 827         else
 828                 fac= 1.0f;
 829
 830         if(fac >= 1.0f) {
 831                 panel_activate_state(C, panel, PANEL_STATE_EXIT);
 832                 return;
 833         }
 834 }
 835
 836 void uiBeginPanels(const bContext *UNUSED(C), ARegion *ar)
 837 {
 838         Panel *pa;
 839
 840         /* set all panels as inactive, so that at the end we know
 841          * which ones were used */
 842         for(pa=ar->panels.first; pa; pa=pa->next) {
 843                 if(pa->runtime_flag & PNL_ACTIVE)
 844                         pa->runtime_flag= PNL_WAS_ACTIVE;
 845                 else
 846                         pa->runtime_flag= 0;
 847         }
 848 }
 849
 850 /* only draws blocks with panels */
 851 void uiEndPanels(const bContext *C, ARegion *ar, int *x, int *y)
 852 {
 853         ScrArea *sa= CTX_wm_area(C);
 854         uiBlock *block;
 855         Panel *panot, *panew, *patest, *pa, *firstpa;
 856
 857         /* offset contents */
 858         for(block= ar->uiblocks.first; block; block= block->next)
 859                 if(block->active && block->panel)
 860                         ui_offset_panel_block(block);
 861
 862         /* consistency; are panels not made, whilst they have tabs */
 863         for(panot= ar->panels.first; panot; panot= panot->next) {
 864                 if((panot->runtime_flag & PNL_ACTIVE)==0) { // not made
 865
 866                         for(panew= ar->panels.first; panew; panew= panew->next) {
 867                                 if((panew->runtime_flag & PNL_ACTIVE)) {
 868                                         if(panew->paneltab==panot) { // panew is tab in notmade pa
 869                                                 break;
 870                                         }
 871                                 }
 872                         }
 873                         /* now panew can become the new parent, check all other tabs */
 874                         if(panew) {
 875                                 for(patest= ar->panels.first; patest; patest= patest->next) {
 876                                         if(patest->paneltab == panot) {
 877                                                 patest->paneltab= panew;
 878                                         }
 879                                 }
 880                                 panot->paneltab= panew;
 881                                 panew->paneltab= NULL;
 882                                 ED_region_tag_redraw(ar); // the buttons panew were not made
 883                         }
 884                 }
 885         }
 886
 887         /* re-align, possibly with animation */
 888         if(panels_re_align(sa, ar, &pa)) {
 889                 if(pa)
 890                         panel_activate_state(C, pa, PANEL_STATE_ANIMATION);
 891                 else
 892                         uiAlignPanelStep(sa, ar, 1.0, 0);
 893         }
 894
 895         /* tag first panel */
 896         firstpa= NULL;
 897         for(block= ar->uiblocks.first; block; block=block->next)
 898                 if(block->active && block->panel)
 899                         if(!firstpa || block->panel->sortorder < firstpa->sortorder)
 900                                 firstpa= block->panel;
 901
 902         if(firstpa)
 903                 firstpa->runtime_flag |= PNL_FIRST;
 904
 905         /* compute size taken up by panel */
 906         ui_panels_size(sa, ar, x, y);
 907 }
 908
 909 void uiDrawPanels(const bContext *C, ARegion *ar)
 910 {
 911         uiBlock *block;
 912
 913         UI_ThemeClearColor(TH_BACK);
 914
 915         /* draw panels, selected on top */
 916         for(block= ar->uiblocks.first; block; block=block->next) {
 917                 if(block->active && block->panel && !(block->panel->flag & PNL_SELECT)) {
 918                         uiDrawBlock(C, block);
 919                 }
 920         }
 921
 922         for(block= ar->uiblocks.first; block; block=block->next) {
 923                 if(block->active && block->panel && (block->panel->flag & PNL_SELECT)) {
 924                         uiDrawBlock(C, block);
 925                 }
 926         }
 927 }
 928
 929 /* ------------ panel merging ---------------- */
 930
 931 static void check_panel_overlap(ARegion *ar, Panel *panel)
 932 {
 933         Panel *pa;
 934
 935         /* also called with panel==NULL for clear */
 936
 937         for(pa=ar->panels.first; pa; pa=pa->next) {
 938                 pa->flag &= ~PNL_OVERLAP;
 939                 if(panel && (pa != panel)) {
 940                         if(pa->paneltab==NULL && (pa->runtime_flag & PNL_ACTIVE)) {
 941                                 float safex= 0.2, safey= 0.2;
 942
 943                                 if(pa->flag & PNL_CLOSEDX) safex= 0.05;
 944                                 else if(pa->flag & PNL_CLOSEDY) safey= 0.05;
 945                                 else if(panel->flag & PNL_CLOSEDX) safex= 0.05;
 946                                 else if(panel->flag & PNL_CLOSEDY) safey= 0.05;
 947
 948                                 if(pa->ofsx > panel->ofsx- safex*panel->sizex)
 949                                 if(pa->ofsx+pa->sizex < panel->ofsx+ (1.0f+safex)*panel->sizex)
 950                                 if(pa->ofsy > panel->ofsy- safey*panel->sizey)
 951                                 if(pa->ofsy+pa->sizey < panel->ofsy+ (1.0f+safey)*panel->sizey)
 952                                         pa->flag |= PNL_OVERLAP;
 953                         }
 954                 }
 955         }
 956 }
 957
 958 /************************ panel dragging ****************************/
 959
 960 static void ui_do_drag(const bContext *C, wmEvent *event, Panel *panel)
 961 {
 962         uiHandlePanelData *data= panel->activedata;
 963         ScrArea *sa= CTX_wm_area(C);
 964         ARegion *ar= CTX_wm_region(C);
 965         short align= panel_aligned(sa, ar), dx=0, dy=0;
 966
 967         /* first clip for window, no dragging outside */
 968         if(!BLI_in_rcti(&ar->winrct, event->x, event->y))
 969                 return;
 970
 971         dx= (event->x-data->startx) & ~(PNL_GRID-1);
 972         dy= (event->y-data->starty) & ~(PNL_GRID-1);
 973
 974         dx *= (float)(ar->v2d.cur.xmax - ar->v2d.cur.xmin)/(float)(ar->winrct.xmax - ar->winrct.xmin);
 975         dy *= (float)(ar->v2d.cur.ymax - ar->v2d.cur.ymin)/(float)(ar->winrct.ymax - ar->winrct.ymin);
 976
 977         if(data->state == PANEL_STATE_DRAG_SCALE) {
 978                 panel->sizex = MAX2(data->startsizex+dx, UI_PANEL_MINX);
 979
 980                 if(data->startsizey-dy < UI_PANEL_MINY)
 981                         dy= -UI_PANEL_MINY+data->startsizey;
 982
 983                 panel->sizey= data->startsizey-dy;
 984                 panel->ofsy= data->startofsy+dy;
 985         }
 986         else {
 987                 /* reset the panel snapping, to allow dragging away from snapped edges */
 988                 panel->snap = PNL_SNAP_NONE;
 989
 990                 panel->ofsx = data->startofsx+dx;
 991                 panel->ofsy = data->startofsy+dy;
 992                 check_panel_overlap(ar, panel);
 993
 994                 if(align) uiAlignPanelStep(sa, ar, 0.2, 1);
 995         }
 996
 997         ED_region_tag_redraw(ar);
 998 }
 999
1000 /******************* region level panel interaction *****************/
1001
1002
1003 /* this function is supposed to call general window drawing too */
1004 /* also it supposes a block has panel, and isn't a menu */
1005 static void ui_handle_panel_header(const bContext *C, uiBlock *block, int mx, int my, int event)
1006 {
1007         ScrArea *sa= CTX_wm_area(C);
1008         ARegion *ar= CTX_wm_region(C);
1009         Panel *pa;
1010         int align= panel_aligned(sa, ar), button= 0;
1011
1012         /* mouse coordinates in panel space! */
1013
1014         /* XXX weak code, currently it assumes layout style for location of widgets */
1015
1016         /* check open/collapsed button */
1017         if(event==RETKEY)
1018                 button= 1;
1019         else if(event==AKEY)
1020                 button= 1;
1021         else if(block->panel->flag & PNL_CLOSEDX) {
1022                 if(my >= block->maxy) button= 1;
1023         }
1024         else if(block->panel->control & UI_PNL_CLOSE) {
1025                 /* whole of header can be used to collapse panel (except top-right corner) */
1026                 if(mx <= block->maxx-8-PNL_ICON) button= 2;
1027                 //else if(mx <= block->minx+10+2*PNL_ICON+2) button= 1;
1028         }
1029         else if(mx <= block->maxx-PNL_ICON-12) {
1030                 button= 1;
1031         }
1032
1033         if(button) {
1034                 if(button==2) { // close
1035                         ED_region_tag_redraw(ar);
1036                 }
1037                 else {  // collapse
1038                         if(block->panel->flag & PNL_CLOSED) {
1039                                 block->panel->flag &= ~PNL_CLOSED;
1040                                 /* snap back up so full panel aligns with screen edge */
1041                                 if (block->panel->snap & PNL_SNAP_BOTTOM)
1042                                         block->panel->ofsy= 0;
1043                         }
1044                         else if(align==BUT_HORIZONTAL) {
1045                                 block->panel->flag |= PNL_CLOSEDX;
1046                         }
1047                         else {
1048                                 /* snap down to bottom screen edge*/
1049                                 block->panel->flag |= PNL_CLOSEDY;
1050                                 if (block->panel->snap & PNL_SNAP_BOTTOM)
1051                                         block->panel->ofsy= -block->panel->sizey;
1052                         }
1053
1054                         for(pa= ar->panels.first; pa; pa= pa->next) {
1055                                 if(pa->paneltab==block->panel) {
1056                                         if(block->panel->flag & PNL_CLOSED) pa->flag |= PNL_CLOSED;
1057                                         else pa->flag &= ~PNL_CLOSED;
1058                                 }
1059                         }
1060                 }
1061
1062                 if(align)
1063                         panel_activate_state(C, block->panel, PANEL_STATE_ANIMATION);
1064                 else
1065                         ED_region_tag_redraw(ar);
1066         }
1067         else if(mx <= (block->maxx-PNL_ICON-12)+PNL_ICON+2) {
1068                 panel_activate_state(C, block->panel, PANEL_STATE_DRAG);
1069         }
1070 }
1071
1072 /* XXX should become modal keymap */
1073 /* AKey is opening/closing panels, independent of button state now */
1074
1075 int ui_handler_panel_region(bContext *C, wmEvent *event)
1076 {
1077         ARegion *ar= CTX_wm_region(C);
1078         uiBlock *block;
1079         Panel *pa;
1080         int retval, mx, my, inside_header= 0, inside_scale= 0, inside;
1081
1082         retval= WM_UI_HANDLER_CONTINUE;
1083         for(block=ar->uiblocks.last; block; block=block->prev) {
1084                 mx= event->x;
1085                 my= event->y;
1086                 ui_window_to_block(ar, block, &mx, &my);
1087
1088                 /* check if inside boundbox */
1089                 inside= 0;
1090                 pa= block->panel;
1091
1092                 if(!pa || pa->paneltab!=NULL)
1093                         continue;
1094                 if(pa->type && pa->type->flag & PNL_NO_HEADER) // XXX - accessed freed panels when scripts reload, need to fix.
1095                         continue;
1096
1097                 if(block->minx <= mx && block->maxx >= mx)
1098                         if(block->miny <= my && block->maxy+PNL_HEADER >= my)
1099                                 inside= 1;
1100
1101                 if(inside && event->val==KM_PRESS) {
1102                         if(event->type == AKEY && !ELEM4(KM_MOD_FIRST, event->ctrl, event->oskey, event->shift, event->alt)) {
1103
1104                                 if(pa->flag & PNL_CLOSEDY) {
1105                                         if((block->maxy <= my) && (block->maxy+PNL_HEADER >= my))
1106                                                 ui_handle_panel_header(C, block, mx, my, event->type);
1107                                 }
1108                                 else
1109                                         ui_handle_panel_header(C, block, mx, my, event->type);
1110
1111                                 continue;
1112                         }
1113                 }
1114
1115                 /* on active button, do not handle panels */
1116                 if(ui_button_is_active(ar))
1117                         continue;
1118
1119                 if(inside) {
1120                         /* clicked at panel header? */
1121                         if(pa->flag & PNL_CLOSEDX) {
1122                                 if(block->minx <= mx && block->minx+PNL_HEADER >= mx)
1123                                         inside_header= 1;
1124                         }
1125                         else if((block->maxy <= my) && (block->maxy+PNL_HEADER >= my)) {
1126                                 inside_header= 1;
1127                         }
1128                         else if(pa->control & UI_PNL_SCALE) {
1129                                 if(block->maxx-PNL_HEADER <= mx)
1130                                         if(block->miny+PNL_HEADER >= my)
1131                                                 inside_scale= 1;
1132                         }
1133
1134                         if(event->val==KM_PRESS) {
1135                                 /* open close on header */
1136                                 if(ELEM(event->type, RETKEY, PADENTER)) {
1137                                         if(inside_header) {
1138                                                 ui_handle_panel_header(C, block, mx, my, RETKEY);
1139                                                 break;
1140                                         }
1141                                 }
1142                                 else if(event->type == LEFTMOUSE) {
1143                                         if(inside_header) {
1144                                                 ui_handle_panel_header(C, block, mx, my, 0);
1145                                                 break;
1146                                         }
1147                                         else if(inside_scale && !(pa->flag & PNL_CLOSED)) {
1148                                                 panel_activate_state(C, pa, PANEL_STATE_DRAG_SCALE);
1149                                                 break;
1150                                         }
1151                                 }
1152                                 else if(event->type == ESCKEY) {
1153                                         /*XXX 2.50*/
1154 #if 0
1155                                         if(block->handler) {
1156                                                 rem_blockhandler(sa, block->handler);
1157                                                 ED_region_tag_redraw(ar);
1158                                                 retval= WM_UI_HANDLER_BREAK;
1159                                         }
1160 #endif
1161                                 }
1162                                 else if(event->type==PADPLUSKEY || event->type==PADMINUS) {
1163 #if 0 // XXX make float panel exception?
1164                                         int zoom=0;
1165
1166                                         /* if panel is closed, only zoom if mouse is over the header */
1167                                         if (pa->flag & (PNL_CLOSEDX|PNL_CLOSEDY)) {
1168                                                 if (inside_header)
1169                                                         zoom=1;
1170                                         }
1171                                         else
1172                                                 zoom=1;
1173
1174                                         if(zoom) {
1175                                                 ScrArea *sa= CTX_wm_area(C);
1176                                                 SpaceLink *sl= sa->spacedata.first;
1177
1178                                                 if(sa->spacetype!=SPACE_BUTS) {
1179                                                         if(!(pa->control & UI_PNL_SCALE)) {
1180                                                                 if(event->type==PADPLUSKEY) sl->blockscale+= 0.1;
1181                                                                 else sl->blockscale-= 0.1;
1182                                                                 CLAMP(sl->blockscale, 0.6, 1.0);
1183
1184                                                                 ED_region_tag_redraw(ar);
1185                                                                 retval= WM_UI_HANDLER_BREAK;
1186                                                         }
1187                                                 }
1188                                         }
1189 #endif
1190                                 }
1191                         }
1192                 }
1193         }
1194
1195         return retval;
1196 }
1197
1198 /**************** window level modal panel interaction **************/
1199
1200 /* note, this is modal handler and should not swallow events for animation */
1201 static int ui_handler_panel(bContext *C, wmEvent *event, void *userdata)
1202 {
1203         Panel *panel= userdata;
1204         uiHandlePanelData *data= panel->activedata;
1205
1206         /* verify if we can stop */
1207         if(event->type == LEFTMOUSE && event->val!=KM_PRESS) {
1208                 ScrArea *sa= CTX_wm_area(C);
1209                 ARegion *ar= CTX_wm_region(C);
1210                 int align= panel_aligned(sa, ar);
1211
1212                 if(align)
1213                         panel_activate_state(C, panel, PANEL_STATE_ANIMATION);
1214                 else
1215                         panel_activate_state(C, panel, PANEL_STATE_EXIT);
1216         }
1217         else if(event->type == MOUSEMOVE) {
1218                 if(data->state == PANEL_STATE_DRAG)
1219                         ui_do_drag(C, event, panel);
1220         }
1221         else if(event->type == TIMER && event->customdata == data->animtimer) {
1222                 if(data->state == PANEL_STATE_ANIMATION)
1223                         ui_do_animate(C, panel);
1224                 else if(data->state == PANEL_STATE_DRAG)
1225                         ui_do_drag(C, event, panel);
1226         }
1227
1228         data= panel->activedata;
1229
1230         if(data && data->state == PANEL_STATE_ANIMATION)
1231                 return WM_UI_HANDLER_CONTINUE;
1232         else
1233                 return WM_UI_HANDLER_BREAK;
1234 }
1235
1236 static void ui_handler_remove_panel(bContext *C, void *userdata)
1237 {
1238         Panel *pa= userdata;
1239
1240         panel_activate_state(C, pa, PANEL_STATE_EXIT);
1241 }
1242
1243 static void panel_activate_state(const bContext *C, Panel *pa, uiHandlePanelState state)
1244 {
1245         uiHandlePanelData *data= pa->activedata;
1246         wmWindow *win= CTX_wm_window(C);
1247         ARegion *ar= CTX_wm_region(C);
1248
1249         if(data && data->state == state)
1250                 return;
1251
1252         if(state == PANEL_STATE_EXIT || state == PANEL_STATE_ANIMATION) {
1253                 if(data && data->state != PANEL_STATE_ANIMATION) {
1254                         /* XXX:
1255                          *      - the panel tabbing function call below (test_add_new_tabs()) has been commented out
1256                          *        "It is too easy to do by accident when reordering panels, is very hard to control and use, and has no real benefit." - BillRey
1257                          * Aligorith, 2009Sep
1258                          */
1259                         //test_add_new_tabs(ar);   // also copies locations of tabs in dragged panel
1260                         check_panel_overlap(ar, NULL);  // clears
1261                 }
1262
1263                 pa->flag &= ~PNL_SELECT;
1264         }
1265         else
1266                 pa->flag |= PNL_SELECT;
1267
1268         if(data && data->animtimer) {
1269                 WM_event_remove_timer(CTX_wm_manager(C), win, data->animtimer);
1270                 data->animtimer= NULL;
1271         }
1272
1273         if(state == PANEL_STATE_EXIT) {
1274                 MEM_freeN(data);
1275                 pa->activedata= NULL;
1276
1277                 WM_event_remove_ui_handler(&win->modalhandlers, ui_handler_panel, ui_handler_remove_panel, pa, 0);
1278         }
1279         else {
1280                 if(!data) {
1281                         data= MEM_callocN(sizeof(uiHandlePanelData), "uiHandlePanelData");
1282                         pa->activedata= data;
1283
1284                         WM_event_add_ui_handler(C, &win->modalhandlers, ui_handler_panel, ui_handler_remove_panel, pa);
1285                 }
1286
1287                 if(ELEM(state, PANEL_STATE_ANIMATION, PANEL_STATE_DRAG))
1288                         data->animtimer= WM_event_add_timer(CTX_wm_manager(C), win, TIMER, ANIMATION_INTERVAL);
1289
1290                 data->state= state;
1291                 data->startx= win->eventstate->x;
1292                 data->starty= win->eventstate->y;
1293                 data->startofsx= pa->ofsx;
1294                 data->startofsy= pa->ofsy;
1295                 data->startsizex= pa->sizex;
1296                 data->startsizey= pa->sizey;
1297                 data->starttime= PIL_check_seconds_timer();
1298         }
1299
1300         ED_region_tag_redraw(ar);
1301
1302         /* XXX exception handling, 3d window preview panel */
1303 #if 0
1304         if(block->drawextra==BIF_view3d_previewdraw)
1305                 BIF_view3d_previewrender_clear(curarea);
1306 #endif
1307
1308         /* XXX exception handling, 3d window preview panel */
1309 #if 0
1310         if(block->drawextra==BIF_view3d_previewdraw)
1311                 BIF_view3d_previewrender_signal(curarea, PR_DISPRECT);
1312         else if(strcmp(block->name, "image_panel_preview")==0)
1313                 image_preview_event(2);
1314 #endif
1315 }
1316