source/blender/editors/interface/interface_panel.c

   1 /*
   2  * $Id$
   3  *
   4  * ***** BEGIN GPL LICENSE BLOCK *****
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  *
  20  * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
  21  * All rights reserved.
  22  *
  23  * Contributor(s): Blender Foundation, 2003-2009 full recode.
  24  *
  25  * ***** END GPL LICENSE BLOCK *****
  26  */
  27
  28 /** \file blender/editors/interface/interface_panel.c
  29  *  \ingroup edinterface
  30  */
  31
  32
  33 /* a full doc with API notes can be found in bf-blender/trunk/blender/doc/guides/interface_API.txt */
  34
  35 #include <math.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <ctype.h>
  39
  40 #include "MEM_guardedalloc.h"
  41
  42 #include "PIL_time.h"
  43
  44 #include "BLI_blenlib.h"
  45 #include "BLI_math.h"
  46 #include "BLI_utildefines.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
  63 #include "interface_intern.h"
  64
  65 /*********************** defines and structs ************************/
  66
  67 #define ANIMATION_TIME          0.30
  68 #define ANIMATION_INTERVAL      0.02
  69
  70 #define PNL_LAST_ADDED          1
  71 #define PNL_ACTIVE                      2
  72 #define PNL_WAS_ACTIVE          4
  73 #define PNL_ANIM_ALIGN          8
  74 #define PNL_NEW_ADDED           16
  75 #define PNL_FIRST                       32
  76
  77 typedef enum uiHandlePanelState {
  78         PANEL_STATE_DRAG,
  79         PANEL_STATE_DRAG_SCALE,
  80         PANEL_STATE_WAIT_UNTAB,
  81         PANEL_STATE_ANIMATION,
  82         PANEL_STATE_EXIT
  83 } uiHandlePanelState;
  84
  85 typedef struct uiHandlePanelData {
  86         uiHandlePanelState state;
  87
  88         /* animation */
  89         wmTimer *animtimer;
  90         double starttime;
  91
  92         /* dragging */
  93         int startx, starty;
  94         int startofsx, startofsy;
  95         int startsizex, startsizey;
  96 } uiHandlePanelData;
  97
  98 static void panel_activate_state(const bContext *C, Panel *pa, uiHandlePanelState state);
  99
 100 /*********************** space specific code ************************/
 101 /* temporary code to remove all sbuts stuff from panel code         */
 102
 103 static int panel_aligned(ScrArea *sa, ARegion *ar)
 104 {
 105         if(sa->spacetype==SPACE_BUTS && ar->regiontype == RGN_TYPE_WINDOW) {
 106                 SpaceButs *sbuts= sa->spacedata.first;
 107                 return sbuts->align;
 108         }
 109         else if(sa->spacetype==SPACE_USERPREF && ar->regiontype == RGN_TYPE_WINDOW)
 110                 return BUT_VERTICAL;
 111         else if(sa->spacetype==SPACE_FILE && ar->regiontype == RGN_TYPE_CHANNELS)
 112                 return BUT_VERTICAL;
 113         else if(sa->spacetype==SPACE_IMAGE && ar->regiontype == RGN_TYPE_PREVIEW)
 114                 return BUT_VERTICAL;
 115         else if(ELEM3(ar->regiontype, RGN_TYPE_UI, RGN_TYPE_TOOLS, RGN_TYPE_TOOL_PROPS))
 116                 return BUT_VERTICAL;
 117
 118         return 0;
 119 }
 120
 121 static int panels_re_align(ScrArea *sa, ARegion *ar, Panel **r_pa)
 122 {
 123         Panel *pa;
 124         int active= 0;
 125
 126         *r_pa= NULL;
 127
 128         if(sa->spacetype==SPACE_BUTS && ar->regiontype == RGN_TYPE_WINDOW) {
 129                 SpaceButs *sbuts= sa->spacedata.first;
 130
 131                 if(sbuts->align)
 132                         if(sbuts->re_align || sbuts->mainbo!=sbuts->mainb)
 133                                 return 1;
 134         }
 135         else if(ar->regiontype==RGN_TYPE_UI)
 136                 return 1;
 137         else if(sa->spacetype==SPACE_IMAGE && ar->regiontype == RGN_TYPE_PREVIEW)
 138                 return 1;
 139         else if(sa->spacetype==SPACE_FILE && ar->regiontype == RGN_TYPE_CHANNELS)
 140                 return 1;
 141
 142         /* in case panel is added or disappears */
 143         for(pa=ar->panels.first; pa; pa=pa->next) {
 144                 if((pa->runtime_flag & PNL_WAS_ACTIVE) && !(pa->runtime_flag & PNL_ACTIVE))
 145                         return 1;
 146                 if(!(pa->runtime_flag & PNL_WAS_ACTIVE) && (pa->runtime_flag & PNL_ACTIVE))
 147                         return 1;
 148                 if(pa->activedata)
 149                         active= 1;
 150         }
 151
 152         /* in case we need to do an animation (size changes) */
 153         for(pa=ar->panels.first; pa; pa=pa->next) {
 154                 if(pa->runtime_flag & PNL_ANIM_ALIGN) {
 155                         if(!active)
 156                                 *r_pa= pa;
 157                         return 1;
 158                 }
 159         }
 160
 161         return 0;
 162 }
 163
 164 /****************************** panels ******************************/
 165
 166 static void ui_panel_copy_offset(Panel *pa, Panel *papar)
 167 {
 168         /* with respect to sizes... papar is parent */
 169
 170         pa->ofsx= papar->ofsx;
 171         pa->ofsy= papar->ofsy + papar->sizey-pa->sizey;
 172 }
 173
 174 Panel *uiBeginPanel(ScrArea *sa, ARegion *ar, uiBlock *block, PanelType *pt, int *open)
 175 {
 176         uiStyle *style= U.uistyles.first;
 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= style->panelouter;
 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= U.uistyles.first;
 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 /* NOTE - this seems to be only used for hiding nodes now */
 334 void UI_DrawTriIcon(float x, float y, char dir)
 335 {
 336         if(dir=='h') {
 337                 ui_draw_anti_tria( x-3, y-5, x-3, y+5, x+7,y );
 338         }
 339         else if(dir=='t') {
 340                 ui_draw_anti_tria( x-5, y-7, x+5, y-7, x, y+3);
 341         }
 342         else { /* 'v' = vertical, down */
 343                 ui_draw_anti_tria( x-5, y+3, x+5, y+3, x, y-7);
 344         }
 345 }
 346
 347 /* triangle 'icon' inside rect */
 348 static void ui_draw_tria_rect(rctf *rect, char dir)
 349 {
 350         if(dir=='h') {
 351                 float half= 0.5f*(rect->ymax - rect->ymin);
 352                 ui_draw_anti_tria(rect->xmin, rect->ymin, rect->xmin, rect->ymax, rect->xmax, rect->ymin+half);
 353         }
 354         else {
 355                 float half= 0.5f*(rect->xmax - rect->xmin);
 356                 ui_draw_anti_tria(rect->xmin, rect->ymax, rect->xmax, rect->ymax, rect->xmin+half, rect->ymin);
 357         }
 358 }
 359
 360 static void ui_draw_anti_x(float x1, float y1, float x2, float y2)
 361 {
 362
 363         /* set antialias line */
 364         glEnable(GL_LINE_SMOOTH);
 365         glEnable(GL_BLEND);
 366
 367         glLineWidth(2.0);
 368
 369         fdrawline(x1, y1, x2, y2);
 370         fdrawline(x1, y2, x2, y1);
 371
 372         glLineWidth(1.0);
 373
 374         glDisable(GL_LINE_SMOOTH);
 375         glDisable(GL_BLEND);
 376
 377 }
 378
 379 /* x 'icon' for panel header */
 380 static void ui_draw_x_icon(float x, float y)
 381 {
 382
 383         ui_draw_anti_x(x, y, x+9.375f, y+9.375f);
 384
 385 }
 386
 387 #define PNL_ICON        UI_UNIT_X  /* could be UI_UNIT_Y too */
 388
 389 static void ui_draw_panel_scalewidget(rcti *rect)
 390 {
 391         float xmin, xmax, dx;
 392         float ymin, ymax, dy;
 393
 394         xmin= rect->xmax-PNL_HEADER+2;
 395         xmax= rect->xmax-3;
 396         ymin= rect->ymin+3;
 397         ymax= rect->ymin+PNL_HEADER-2;
 398
 399         dx= 0.5f*(xmax-xmin);
 400         dy= 0.5f*(ymax-ymin);
 401
 402         glEnable(GL_BLEND);
 403         glColor4ub(255, 255, 255, 50);
 404         fdrawline(xmin, ymin, xmax, ymax);
 405         fdrawline(xmin+dx, ymin, xmax, ymax-dy);
 406
 407         glColor4ub(0, 0, 0, 50);
 408         fdrawline(xmin, ymin+1, xmax, ymax+1);
 409         fdrawline(xmin+dx, ymin+1, xmax, ymax-dy+1);
 410         glDisable(GL_BLEND);
 411 }
 412
 413 static void ui_draw_panel_dragwidget(rctf *rect)
 414 {
 415         float xmin, xmax, dx;
 416         float ymin, ymax, dy;
 417
 418         xmin= rect->xmin;
 419         xmax= rect->xmax;
 420         ymin= rect->ymin;
 421         ymax= rect->ymax;
 422
 423         dx= 0.333f*(xmax-xmin);
 424         dy= 0.333f*(ymax-ymin);
 425
 426         glEnable(GL_BLEND);
 427         glColor4ub(255, 255, 255, 50);
 428         fdrawline(xmin, ymax, xmax, ymin);
 429         fdrawline(xmin+dx, ymax, xmax, ymin+dy);
 430         fdrawline(xmin+2*dx, ymax, xmax, ymin+2*dy);
 431
 432         glColor4ub(0, 0, 0, 50);
 433         fdrawline(xmin, ymax+1, xmax, ymin+1);
 434         fdrawline(xmin+dx, ymax+1, xmax, ymin+dy+1);
 435         fdrawline(xmin+2*dx, ymax+1, xmax, ymin+2*dy+1);
 436         glDisable(GL_BLEND);
 437 }
 438
 439
 440 static void ui_draw_aligned_panel_header(uiStyle *style, uiBlock *block, rcti *rect, char dir)
 441 {
 442         Panel *panel= block->panel;
 443         rcti hrect;
 444         int  pnl_icons;
 445         char *activename= panel->drawname[0]?panel->drawname:panel->panelname;
 446
 447         /* + 0.001f to avoid flirting with float inaccuracy */
 448         if(panel->control & UI_PNL_CLOSE) pnl_icons=(panel->labelofs+2*PNL_ICON+5)/block->aspect + 0.001f;
 449         else pnl_icons= (panel->labelofs+PNL_ICON+5)/block->aspect + 0.001f;
 450
 451         /* active tab */
 452         /* draw text label */
 453         UI_ThemeColor(TH_TITLE);
 454
 455         hrect= *rect;
 456         if(dir == 'h') {
 457                 hrect.xmin= rect->xmin+pnl_icons;
 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         Panel *panel= block->panel;
 486         rcti headrect;
 487         rctf itemrect;
 488         int ofsx;
 489
 490         if(panel->paneltab) return;
 491         if(panel->type && (panel->type->flag & PNL_NO_HEADER)) return;
 492
 493         /* calculate header rect */
 494         /* + 0.001f to prevent flicker due to float inaccuracy */
 495         headrect= *rect;
 496         headrect.ymin= headrect.ymax;
 497         headrect.ymax= headrect.ymin + floor(PNL_HEADER/block->aspect + 0.001f);
 498
 499         if(!(panel->runtime_flag & PNL_FIRST)) {
 500                 float minx= rect->xmin+5.0f/block->aspect;
 501                 float maxx= rect->xmax-5.0f/block->aspect;
 502                 float y= headrect.ymax;
 503
 504                 glEnable(GL_BLEND);
 505                 glColor4f(0.0f, 0.0f, 0.0f, 0.5f);
 506                 fdrawline(minx, y+1, maxx, y+1);
 507                 glColor4f(1.0f, 1.0f, 1.0f, 0.25f);
 508                 fdrawline(minx, y, maxx, y);
 509                 glDisable(GL_BLEND);
 510         }
 511
 512         /* horizontal title */
 513         if(!(panel->flag & PNL_CLOSEDX)) {
 514                 ui_draw_aligned_panel_header(style, block, &headrect, 'h');
 515
 516                 /* itemrect smaller */
 517                 itemrect.xmax= headrect.xmax - 5.0f/block->aspect;
 518                 itemrect.xmin= itemrect.xmax - (headrect.ymax-headrect.ymin);
 519                 itemrect.ymin= headrect.ymin;
 520                 itemrect.ymax= headrect.ymax;
 521                 rectf_scale(&itemrect, 0.8f);
 522                 ui_draw_panel_dragwidget(&itemrect);
 523         }
 524
 525         /* if the panel is minimized vertically:
 526                 * (------)
 527                 */
 528         if(panel->flag & PNL_CLOSEDY) {
 529
 530         }
 531         else if(panel->flag & PNL_CLOSEDX) {
 532                 /* draw vertical title */
 533                 ui_draw_aligned_panel_header(style, block, &headrect, 'v');
 534         }
 535         /* an open panel */
 536         else {
 537
 538                 /* in some occasions, draw a border */
 539                 if(panel->flag & PNL_SELECT) {
 540                         if(panel->control & UI_PNL_SOLID) uiSetRoundBox(15);
 541                         else uiSetRoundBox(3);
 542
 543                         UI_ThemeColorShade(TH_BACK, -120);
 544                         uiRoundRect(0.5f + rect->xmin, 0.5f + rect->ymin, 0.5f + rect->xmax, 0.5f + headrect.ymax+1, 8);
 545                 }
 546
 547                 if(panel->control & UI_PNL_SCALE)
 548                         ui_draw_panel_scalewidget(rect);
 549         }
 550
 551         /* draw optional close icon */
 552
 553         ofsx= 6;
 554         if(panel->control & UI_PNL_CLOSE) {
 555
 556                 UI_ThemeColor(TH_TEXT);
 557                 ui_draw_x_icon(rect->xmin+2+ofsx, rect->ymax+2);
 558                 ofsx= 22;
 559         }
 560
 561         /* draw collapse icon */
 562         UI_ThemeColor(TH_TEXT);
 563
 564         /* itemrect smaller */
 565         itemrect.xmin= headrect.xmin + 5.0f/block->aspect;
 566         itemrect.xmax= itemrect.xmin + (headrect.ymax-headrect.ymin);
 567         itemrect.ymin= headrect.ymin;
 568         itemrect.ymax= headrect.ymax;
 569
 570         rectf_scale(&itemrect, 0.5f);
 571
 572         if(panel->flag & PNL_CLOSEDY)
 573                 ui_draw_tria_rect(&itemrect, 'h');
 574         else if(panel->flag & PNL_CLOSEDX)
 575                 ui_draw_tria_rect(&itemrect, 'h');
 576         else
 577                 ui_draw_tria_rect(&itemrect, 'v');
 578
 579         (void)ofsx;
 580 }
 581
 582 /************************** panel alignment *************************/
 583
 584 static int get_panel_header(Panel *pa)
 585 {
 586         if(pa->type && (pa->type->flag & PNL_NO_HEADER))
 587                 return 0;
 588
 589         return PNL_HEADER;
 590 }
 591
 592 static int get_panel_size_y(uiStyle *style, Panel *pa)
 593 {
 594         if(pa->type && (pa->type->flag & PNL_NO_HEADER))
 595                 return pa->sizey;
 596
 597         return PNL_HEADER + pa->sizey + style->panelouter;
 598 }
 599
 600 /* this function is needed because uiBlock and Panel itself dont
 601 change sizey or location when closed */
 602 static int get_panel_real_ofsy(Panel *pa)
 603 {
 604         if(pa->flag & PNL_CLOSEDY) return pa->ofsy+pa->sizey;
 605         else if(pa->paneltab && (pa->paneltab->flag & PNL_CLOSEDY)) return pa->ofsy+pa->sizey;
 606         else if(pa->paneltab) return pa->paneltab->ofsy;
 607         else return pa->ofsy;
 608 }
 609
 610 static int get_panel_real_ofsx(Panel *pa)
 611 {
 612         if(pa->flag & PNL_CLOSEDX) return pa->ofsx+get_panel_header(pa);
 613         else if(pa->paneltab && (pa->paneltab->flag & PNL_CLOSEDX)) return pa->ofsx+get_panel_header(pa);
 614         else return pa->ofsx+pa->sizex;
 615 }
 616
 617 typedef struct PanelSort {
 618         Panel *pa, *orig;
 619 } PanelSort;
 620
 621 /* note about sorting;
 622    the sortorder has a lower value for new panels being added.
 623    however, that only works to insert a single panel, when more new panels get
 624    added the coordinates of existing panels and the previously stored to-be-insterted
 625    panels do not match for sorting */
 626
 627 static int find_leftmost_panel(const void *a1, const void *a2)
 628 {
 629         const PanelSort *ps1=a1, *ps2=a2;
 630
 631         if(ps1->pa->ofsx > ps2->pa->ofsx) return 1;
 632         else if(ps1->pa->ofsx < ps2->pa->ofsx) return -1;
 633         else if(ps1->pa->sortorder > ps2->pa->sortorder) return 1;
 634         else if(ps1->pa->sortorder < ps2->pa->sortorder) return -1;
 635
 636         return 0;
 637 }
 638
 639
 640 static int find_highest_panel(const void *a1, const void *a2)
 641 {
 642         const PanelSort *ps1=a1, *ps2=a2;
 643
 644         /* stick uppermost header-less panels to the top of the region -
 645          * prevent them from being sorted */
 646         if (ps1->pa->sortorder < ps2->pa->sortorder && ps1->pa->type->flag & PNL_NO_HEADER) return -1;
 647
 648         if(ps1->pa->ofsy+ps1->pa->sizey < ps2->pa->ofsy+ps2->pa->sizey) return 1;
 649         else if(ps1->pa->ofsy+ps1->pa->sizey > ps2->pa->ofsy+ps2->pa->sizey) return -1;
 650         else if(ps1->pa->sortorder > ps2->pa->sortorder) return 1;
 651         else if(ps1->pa->sortorder < ps2->pa->sortorder) return -1;
 652
 653         return 0;
 654 }
 655
 656 static int compare_panel(const void *a1, const void *a2)
 657 {
 658         const PanelSort *ps1=a1, *ps2=a2;
 659
 660         if(ps1->pa->sortorder > ps2->pa->sortorder) return 1;
 661         else if(ps1->pa->sortorder < ps2->pa->sortorder) return -1;
 662
 663         return 0;
 664 }
 665
 666 /* this doesnt draw */
 667 /* returns 1 when it did something */
 668 static int uiAlignPanelStep(ScrArea *sa, ARegion *ar, float fac, int drag)
 669 {
 670         uiStyle *style= U.uistyles.first;
 671         Panel *pa;
 672         PanelSort *ps, *panelsort, *psnext;
 673         int a, tot=0, done;
 674         int align= panel_aligned(sa, ar);
 675
 676         /* count active, not tabbed panels */
 677         for(pa= ar->panels.first; pa; pa= pa->next)
 678                 if((pa->runtime_flag & PNL_ACTIVE) && pa->paneltab==NULL)
 679                         tot++;
 680
 681         if(tot==0) return 0;
 682
 683         /* extra; change close direction? */
 684         for(pa= ar->panels.first; pa; pa= pa->next) {
 685                 if((pa->runtime_flag & PNL_ACTIVE) && pa->paneltab==NULL) {
 686                         if((pa->flag & PNL_CLOSEDX) && (align==BUT_VERTICAL))
 687                                 pa->flag ^= PNL_CLOSED;
 688                         else if((pa->flag & PNL_CLOSEDY) && (align==BUT_HORIZONTAL))
 689                                 pa->flag ^= PNL_CLOSED;
 690                 }
 691         }
 692
 693         /* sort panels */
 694         panelsort= MEM_callocN(tot*sizeof(PanelSort), "panelsort");
 695
 696         ps= panelsort;
 697         for(pa= ar->panels.first; pa; pa= pa->next) {
 698                 if((pa->runtime_flag & PNL_ACTIVE) && pa->paneltab==NULL) {
 699                         ps->pa= MEM_dupallocN(pa);
 700                         ps->orig= pa;
 701                         ps++;
 702                 }
 703         }
 704
 705         if(drag) {
 706                 /* while we are dragging, we sort on location and update sortorder */
 707                 if(align==BUT_VERTICAL)
 708                         qsort(panelsort, tot, sizeof(PanelSort), find_highest_panel);
 709                 else
 710                         qsort(panelsort, tot, sizeof(PanelSort), find_leftmost_panel);
 711
 712                 for(ps=panelsort, a=0; a<tot; a++, ps++)
 713                         ps->orig->sortorder= a;
 714         }
 715         else
 716                 /* otherwise use sortorder */
 717                 qsort(panelsort, tot, sizeof(PanelSort), compare_panel);
 718
 719         /* no smart other default start loc! this keeps switching f5/f6/etc compatible */
 720         ps= panelsort;
 721         ps->pa->ofsx= 0;
 722         ps->pa->ofsy= -get_panel_size_y(style, ps->pa);
 723
 724         for(a=0; a<tot-1; a++, ps++) {
 725                 psnext= ps+1;
 726
 727                 if(align==BUT_VERTICAL) {
 728                         psnext->pa->ofsx= ps->pa->ofsx;
 729                         psnext->pa->ofsy= get_panel_real_ofsy(ps->pa) - get_panel_size_y(style, psnext->pa);
 730                 }
 731                 else {
 732                         psnext->pa->ofsx= get_panel_real_ofsx(ps->pa);
 733                         psnext->pa->ofsy= ps->pa->ofsy + get_panel_size_y(style, ps->pa) - get_panel_size_y(style, psnext->pa);
 734                 }
 735         }
 736
 737         /* we interpolate */
 738         done= 0;
 739         ps= panelsort;
 740         for(a=0; a<tot; a++, ps++) {
 741                 if((ps->pa->flag & PNL_SELECT)==0) {
 742                         if((ps->orig->ofsx != ps->pa->ofsx) || (ps->orig->ofsy != ps->pa->ofsy)) {
 743                                 ps->orig->ofsx= floorf(0.5f + fac*(float)ps->pa->ofsx + (1.0f-fac)*(float)ps->orig->ofsx);
 744                                 ps->orig->ofsy= floorf(0.5f + fac*(float)ps->pa->ofsy + (1.0f-fac)*(float)ps->orig->ofsy);
 745                                 done= 1;
 746                         }
 747                 }
 748         }
 749
 750         /* copy locations to tabs */
 751         for(pa= ar->panels.first; pa; pa= pa->next)
 752                 if(pa->paneltab && (pa->runtime_flag & PNL_ACTIVE))
 753                         ui_panel_copy_offset(pa, pa->paneltab);
 754
 755         /* free panelsort array */
 756         for(ps= panelsort, a=0; a<tot; a++, ps++)
 757                 MEM_freeN(ps->pa);
 758         MEM_freeN(panelsort);
 759
 760         return done;
 761 }
 762
 763
 764 static void ui_do_animate(const bContext *C, Panel *panel)
 765 {
 766         uiHandlePanelData *data= panel->activedata;
 767         ScrArea *sa= CTX_wm_area(C);
 768         ARegion *ar= CTX_wm_region(C);
 769         float fac;
 770
 771         fac= (PIL_check_seconds_timer()-data->starttime)/ANIMATION_TIME;
 772         fac= sqrt(fac);
 773         fac= MIN2(fac, 1.0f);
 774
 775         /* for max 1 second, interpolate positions */
 776         if(uiAlignPanelStep(sa, ar, fac, 0))
 777                 ED_region_tag_redraw(ar);
 778         else
 779                 fac= 1.0f;
 780
 781         if(fac >= 1.0f) {
 782                 panel_activate_state(C, panel, PANEL_STATE_EXIT);
 783                 return;
 784         }
 785 }
 786
 787 void uiBeginPanels(const bContext *UNUSED(C), ARegion *ar)
 788 {
 789         Panel *pa;
 790
 791           /* set all panels as inactive, so that at the end we know
 792          * which ones were used */
 793         for(pa=ar->panels.first; pa; pa=pa->next) {
 794                 if(pa->runtime_flag & PNL_ACTIVE)
 795                         pa->runtime_flag= PNL_WAS_ACTIVE;
 796                 else
 797                         pa->runtime_flag= 0;
 798         }
 799 }
 800
 801 /* only draws blocks with panels */
 802 void uiEndPanels(const bContext *C, ARegion *ar)
 803 {
 804         ScrArea *sa= CTX_wm_area(C);
 805         uiBlock *block;
 806         Panel *panot, *panew, *patest, *pa, *firstpa;
 807
 808         /* offset contents */
 809         for(block= ar->uiblocks.first; block; block= block->next)
 810                 if(block->active && block->panel)
 811                         ui_offset_panel_block(block);
 812
 813         /* consistency; are panels not made, whilst they have tabs */
 814         for(panot= ar->panels.first; panot; panot= panot->next) {
 815                 if((panot->runtime_flag & PNL_ACTIVE)==0) { // not made
 816
 817                         for(panew= ar->panels.first; panew; panew= panew->next) {
 818                                 if((panew->runtime_flag & PNL_ACTIVE)) {
 819                                         if(panew->paneltab==panot) { // panew is tab in notmade pa
 820                                                 break;
 821                                         }
 822                                 }
 823                         }
 824                         /* now panew can become the new parent, check all other tabs */
 825                         if(panew) {
 826                                 for(patest= ar->panels.first; patest; patest= patest->next) {
 827                                         if(patest->paneltab == panot) {
 828                                                 patest->paneltab= panew;
 829                                         }
 830                                 }
 831                                 panot->paneltab= panew;
 832                                 panew->paneltab= NULL;
 833                                 ED_region_tag_redraw(ar); // the buttons panew were not made
 834                         }
 835                 }
 836         }
 837
 838         /* re-align, possibly with animation */
 839         if(panels_re_align(sa, ar, &pa)) {
 840                 if(pa)
 841                         panel_activate_state(C, pa, PANEL_STATE_ANIMATION);
 842                 else
 843                         uiAlignPanelStep(sa, ar, 1.0, 0);
 844         }
 845
 846         /* tag first panel */
 847         firstpa= NULL;
 848         for(block= ar->uiblocks.first; block; block=block->next)
 849                 if(block->active && block->panel)
 850                         if(!firstpa || block->panel->sortorder < firstpa->sortorder)
 851                                 firstpa= block->panel;
 852
 853         if(firstpa)
 854                 firstpa->runtime_flag |= PNL_FIRST;
 855
 856         UI_ThemeClearColor(TH_BACK);
 857
 858         /* draw panels, selected on top */
 859         for(block= ar->uiblocks.first; block; block=block->next) {
 860                 if(block->active && block->panel && !(block->panel->flag & PNL_SELECT)) {
 861                         uiDrawBlock(C, block);
 862                 }
 863         }
 864
 865         for(block= ar->uiblocks.first; block; block=block->next) {
 866                 if(block->active && block->panel && (block->panel->flag & PNL_SELECT)) {
 867                         uiDrawBlock(C, block);
 868                 }
 869         }
 870 }
 871
 872 /* ------------ panel merging ---------------- */
 873
 874 static void check_panel_overlap(ARegion *ar, Panel *panel)
 875 {
 876         Panel *pa;
 877
 878         /* also called with panel==NULL for clear */
 879
 880         for(pa=ar->panels.first; pa; pa=pa->next) {
 881                 pa->flag &= ~PNL_OVERLAP;
 882                 if(panel && (pa != panel)) {
 883                         if(pa->paneltab==NULL && (pa->runtime_flag & PNL_ACTIVE)) {
 884                                 float safex= 0.2, safey= 0.2;
 885
 886                                 if(pa->flag & PNL_CLOSEDX) safex= 0.05;
 887                                 else if(pa->flag & PNL_CLOSEDY) safey= 0.05;
 888                                 else if(panel->flag & PNL_CLOSEDX) safex= 0.05;
 889                                 else if(panel->flag & PNL_CLOSEDY) safey= 0.05;
 890
 891                                 if(pa->ofsx > panel->ofsx- safex*panel->sizex)
 892                                 if(pa->ofsx+pa->sizex < panel->ofsx+ (1.0f+safex)*panel->sizex)
 893                                 if(pa->ofsy > panel->ofsy- safey*panel->sizey)
 894                                 if(pa->ofsy+pa->sizey < panel->ofsy+ (1.0f+safey)*panel->sizey)
 895                                         pa->flag |= PNL_OVERLAP;
 896                         }
 897                 }
 898         }
 899 }
 900
 901 /************************ panel dragging ****************************/
 902
 903 static void ui_do_drag(const bContext *C, wmEvent *event, Panel *panel)
 904 {
 905         uiHandlePanelData *data= panel->activedata;
 906         ScrArea *sa= CTX_wm_area(C);
 907         ARegion *ar= CTX_wm_region(C);
 908         short align= panel_aligned(sa, ar), dx=0, dy=0;
 909
 910         /* first clip for window, no dragging outside */
 911         if(!BLI_in_rcti(&ar->winrct, event->x, event->y))
 912                 return;
 913
 914         dx= (event->x-data->startx) & ~(PNL_GRID-1);
 915         dy= (event->y-data->starty) & ~(PNL_GRID-1);
 916
 917         dx *= (float)(ar->v2d.cur.xmax - ar->v2d.cur.xmin)/(float)(ar->winrct.xmax - ar->winrct.xmin);
 918         dy *= (float)(ar->v2d.cur.ymax - ar->v2d.cur.ymin)/(float)(ar->winrct.ymax - ar->winrct.ymin);
 919
 920         if(data->state == PANEL_STATE_DRAG_SCALE) {
 921                 panel->sizex = MAX2(data->startsizex+dx, UI_PANEL_MINX);
 922
 923                 if(data->startsizey-dy < UI_PANEL_MINY)
 924                         dy= -UI_PANEL_MINY+data->startsizey;
 925
 926                 panel->sizey= data->startsizey-dy;
 927                 panel->ofsy= data->startofsy+dy;
 928         }
 929         else {
 930                 /* reset the panel snapping, to allow dragging away from snapped edges */
 931                 panel->snap = PNL_SNAP_NONE;
 932
 933                 panel->ofsx = data->startofsx+dx;
 934                 panel->ofsy = data->startofsy+dy;
 935                 check_panel_overlap(ar, panel);
 936
 937                 if(align) uiAlignPanelStep(sa, ar, 0.2, 1);
 938         }
 939
 940         ED_region_tag_redraw(ar);
 941 }
 942
 943 /******************* region level panel interaction *****************/
 944
 945
 946 /* this function is supposed to call general window drawing too */
 947 /* also it supposes a block has panel, and isnt a menu */
 948 static void ui_handle_panel_header(const bContext *C, uiBlock *block, int mx, int my, int event)
 949 {
 950         ScrArea *sa= CTX_wm_area(C);
 951         ARegion *ar= CTX_wm_region(C);
 952         Panel *pa;
 953         int align= panel_aligned(sa, ar), button= 0;
 954
 955         /* mouse coordinates in panel space! */
 956
 957         /* XXX weak code, currently it assumes layout style for location of widgets */
 958
 959         /* check open/collapsed button */
 960         if(event==RETKEY)
 961                 button= 1;
 962         else if(event==AKEY)
 963                 button= 1;
 964         else if(block->panel->flag & PNL_CLOSEDX) {
 965                 if(my >= block->maxy) button= 1;
 966         }
 967         else if(block->panel->control & UI_PNL_CLOSE) {
 968                 /* whole of header can be used to collapse panel (except top-right corner) */
 969                 if(mx <= block->maxx-8-PNL_ICON) button= 2;
 970                 //else if(mx <= block->minx+10+2*PNL_ICON+2) button= 1;
 971         }
 972         else if(mx <= block->maxx-PNL_ICON-12) {
 973                 button= 1;
 974         }
 975
 976         if(button) {
 977                 if(button==2) { // close
 978                         ED_region_tag_redraw(ar);
 979                 }
 980                 else {  // collapse
 981                         if(block->panel->flag & PNL_CLOSED) {
 982                                 block->panel->flag &= ~PNL_CLOSED;
 983                                 /* snap back up so full panel aligns with screen edge */
 984                                 if (block->panel->snap & PNL_SNAP_BOTTOM)
 985                                         block->panel->ofsy= 0;
 986                         }
 987                         else if(align==BUT_HORIZONTAL) {
 988                                 block->panel->flag |= PNL_CLOSEDX;
 989                         }
 990                         else {
 991                                 /* snap down to bottom screen edge*/
 992                                 block->panel->flag |= PNL_CLOSEDY;
 993                                 if (block->panel->snap & PNL_SNAP_BOTTOM)
 994                                         block->panel->ofsy= -block->panel->sizey;
 995                         }
 996
 997                         for(pa= ar->panels.first; pa; pa= pa->next) {
 998                                 if(pa->paneltab==block->panel) {
 999                                         if(block->panel->flag & PNL_CLOSED) pa->flag |= PNL_CLOSED;
1000                                         else pa->flag &= ~PNL_CLOSED;
1001                                 }
1002                         }
1003                 }
1004
1005                 if(align)
1006                         panel_activate_state(C, block->panel, PANEL_STATE_ANIMATION);
1007                 else
1008                         ED_region_tag_redraw(ar);
1009         }
1010         else if(mx <= (block->maxx-PNL_ICON-12)+PNL_ICON+2) {
1011                 panel_activate_state(C, block->panel, PANEL_STATE_DRAG);
1012         }
1013 }
1014
1015 /* XXX should become modal keymap */
1016 /* AKey is opening/closing panels, independent of button state now */
1017
1018 int ui_handler_panel_region(bContext *C, wmEvent *event)
1019 {
1020         ARegion *ar= CTX_wm_region(C);
1021         uiBlock *block;
1022         Panel *pa;
1023         int retval, mx, my, inside_header= 0, inside_scale= 0, inside;
1024
1025         retval= WM_UI_HANDLER_CONTINUE;
1026         for(block=ar->uiblocks.last; block; block=block->prev) {
1027                 mx= event->x;
1028                 my= event->y;
1029                 ui_window_to_block(ar, block, &mx, &my);
1030
1031                 /* check if inside boundbox */
1032                 inside= 0;
1033                 pa= block->panel;
1034
1035                 if(!pa || pa->paneltab!=NULL)
1036                         continue;
1037                 if(pa->type && pa->type->flag & PNL_NO_HEADER) // XXX - accessed freed panels when scripts reload, need to fix.
1038                         continue;
1039
1040                 if(block->minx <= mx && block->maxx >= mx)
1041                         if(block->miny <= my && block->maxy+PNL_HEADER >= my)
1042                                 inside= 1;
1043
1044                 if(inside && event->val==KM_PRESS) {
1045                         if(event->type == AKEY && !ELEM4(1, event->ctrl, event->oskey, event->shift, event->alt)) {
1046
1047                                 if(pa->flag & PNL_CLOSEDY) {
1048                                         if((block->maxy <= my) && (block->maxy+PNL_HEADER >= my))
1049                                                 ui_handle_panel_header(C, block, mx, my, event->type);
1050                                 }
1051                                 else
1052                                         ui_handle_panel_header(C, block, mx, my, event->type);
1053
1054                                 continue;
1055                         }
1056                 }
1057
1058                 /* on active button, do not handle panels */
1059                 if(ui_button_is_active(ar))
1060                         continue;
1061
1062                 if(inside) {
1063                         /* clicked at panel header? */
1064                         if(pa->flag & PNL_CLOSEDX) {
1065                                 if(block->minx <= mx && block->minx+PNL_HEADER >= mx)
1066                                         inside_header= 1;
1067                         }
1068                         else if((block->maxy <= my) && (block->maxy+PNL_HEADER >= my)) {
1069                                 inside_header= 1;
1070                         }
1071                         else if(pa->control & UI_PNL_SCALE) {
1072                                 if(block->maxx-PNL_HEADER <= mx)
1073                                         if(block->miny+PNL_HEADER >= my)
1074                                                 inside_scale= 1;
1075                         }
1076
1077                         if(event->val==KM_PRESS) {
1078                                 /* open close on header */
1079                                 if(ELEM(event->type, RETKEY, PADENTER)) {
1080                                         if(inside_header) {
1081                                                 ui_handle_panel_header(C, block, mx, my, RETKEY);
1082                                                 break;
1083                                         }
1084                                 }
1085                                 else if(event->type == LEFTMOUSE) {
1086                                         if(inside_header) {
1087                                                 ui_handle_panel_header(C, block, mx, my, 0);
1088                                                 break;
1089                                         }
1090                                         else if(inside_scale && !(pa->flag & PNL_CLOSED)) {
1091                                                 panel_activate_state(C, pa, PANEL_STATE_DRAG_SCALE);
1092                                                 break;
1093                                         }
1094                                 }
1095                                 else if(event->type == ESCKEY) {
1096                                         /*XXX 2.50 if(block->handler) {
1097                                                 rem_blockhandler(sa, block->handler);
1098                                                 ED_region_tag_redraw(ar);
1099                                                 retval= WM_UI_HANDLER_BREAK;
1100                                         }*/
1101                                 }
1102                                 else if(event->type==PADPLUSKEY || event->type==PADMINUS) {
1103 #if 0 // XXX make float panel exception?
1104                                         int zoom=0;
1105
1106                                         /* if panel is closed, only zoom if mouse is over the header */
1107                                         if (pa->flag & (PNL_CLOSEDX|PNL_CLOSEDY)) {
1108                                                 if (inside_header)
1109                                                         zoom=1;
1110                                         }
1111                                         else
1112                                                 zoom=1;
1113
1114                                         if(zoom) {
1115                                                 ScrArea *sa= CTX_wm_area(C);
1116                                                 SpaceLink *sl= sa->spacedata.first;
1117
1118                                                 if(sa->spacetype!=SPACE_BUTS) {
1119                                                         if(!(pa->control & UI_PNL_SCALE)) {
1120                                                                 if(event->type==PADPLUSKEY) sl->blockscale+= 0.1;
1121                                                                 else sl->blockscale-= 0.1;
1122                                                                 CLAMP(sl->blockscale, 0.6, 1.0);
1123
1124                                                                 ED_region_tag_redraw(ar);
1125                                                                 retval= WM_UI_HANDLER_BREAK;
1126                                                         }
1127                                                 }
1128                                         }
1129 #endif
1130                                 }
1131                         }
1132                 }
1133         }
1134
1135         return retval;
1136 }
1137
1138 /**************** window level modal panel interaction **************/
1139
1140 /* note, this is modal handler and should not swallow events for animation */
1141 static int ui_handler_panel(bContext *C, wmEvent *event, void *userdata)
1142 {
1143         Panel *panel= userdata;
1144         uiHandlePanelData *data= panel->activedata;
1145
1146         /* verify if we can stop */
1147         if(event->type == LEFTMOUSE && event->val!=KM_PRESS) {
1148                 ScrArea *sa= CTX_wm_area(C);
1149                 ARegion *ar= CTX_wm_region(C);
1150                 int align= panel_aligned(sa, ar);
1151
1152                 if(align)
1153                         panel_activate_state(C, panel, PANEL_STATE_ANIMATION);
1154                 else
1155                         panel_activate_state(C, panel, PANEL_STATE_EXIT);
1156         }
1157         else if(event->type == MOUSEMOVE) {
1158                 if(data->state == PANEL_STATE_DRAG)
1159                         ui_do_drag(C, event, panel);
1160         }
1161         else if(event->type == TIMER && event->customdata == data->animtimer) {
1162                 if(data->state == PANEL_STATE_ANIMATION)
1163                         ui_do_animate(C, panel);
1164                 else if(data->state == PANEL_STATE_DRAG)
1165                         ui_do_drag(C, event, panel);
1166         }
1167
1168         data= panel->activedata;
1169
1170         if(data && data->state == PANEL_STATE_ANIMATION)
1171                 return WM_UI_HANDLER_CONTINUE;
1172         else
1173                 return WM_UI_HANDLER_BREAK;
1174 }
1175
1176 static void ui_handler_remove_panel(bContext *C, void *userdata)
1177 {
1178         Panel *pa= userdata;
1179
1180         panel_activate_state(C, pa, PANEL_STATE_EXIT);
1181 }
1182
1183 static void panel_activate_state(const bContext *C, Panel *pa, uiHandlePanelState state)
1184 {
1185         uiHandlePanelData *data= pa->activedata;
1186         wmWindow *win= CTX_wm_window(C);
1187         ARegion *ar= CTX_wm_region(C);
1188
1189         if(data && data->state == state)
1190                 return;
1191
1192         if(state == PANEL_STATE_EXIT || state == PANEL_STATE_ANIMATION) {
1193                 if(data && data->state != PANEL_STATE_ANIMATION) {
1194                         /* XXX:
1195                          *      - the panel tabbing function call below (test_add_new_tabs()) has been commented out
1196                          *        "It is too easy to do by accident when reordering panels, is very hard to control and use, and has no real benefit." - BillRey
1197                          * Aligorith, 2009Sep
1198                          */
1199                         //test_add_new_tabs(ar);   // also copies locations of tabs in dragged panel
1200                         check_panel_overlap(ar, NULL);  // clears
1201                 }
1202
1203                 pa->flag &= ~PNL_SELECT;
1204         }
1205         else
1206                 pa->flag |= PNL_SELECT;
1207
1208         if(data && data->animtimer) {
1209                 WM_event_remove_timer(CTX_wm_manager(C), win, data->animtimer);
1210                 data->animtimer= NULL;
1211         }
1212
1213         if(state == PANEL_STATE_EXIT) {
1214                 MEM_freeN(data);
1215                 pa->activedata= NULL;
1216
1217                 WM_event_remove_ui_handler(&win->modalhandlers, ui_handler_panel, ui_handler_remove_panel, pa, 0);
1218         }
1219         else {
1220                 if(!data) {
1221                         data= MEM_callocN(sizeof(uiHandlePanelData), "uiHandlePanelData");
1222                         pa->activedata= data;
1223
1224                         WM_event_add_ui_handler(C, &win->modalhandlers, ui_handler_panel, ui_handler_remove_panel, pa);
1225                 }
1226
1227                 if(ELEM(state, PANEL_STATE_ANIMATION, PANEL_STATE_DRAG))
1228                         data->animtimer= WM_event_add_timer(CTX_wm_manager(C), win, TIMER, ANIMATION_INTERVAL);
1229
1230                 data->state= state;
1231                 data->startx= win->eventstate->x;
1232                 data->starty= win->eventstate->y;
1233                 data->startofsx= pa->ofsx;
1234                 data->startofsy= pa->ofsy;
1235                 data->startsizex= pa->sizex;
1236                 data->startsizey= pa->sizey;
1237                 data->starttime= PIL_check_seconds_timer();
1238         }
1239
1240         ED_region_tag_redraw(ar);
1241
1242         /* XXX exception handling, 3d window preview panel */
1243         /* if(block->drawextra==BIF_view3d_previewdraw)
1244                 BIF_view3d_previewrender_clear(curarea);*/
1245
1246         /* XXX exception handling, 3d window preview panel */
1247         /* if(block->drawextra==BIF_view3d_previewdraw)
1248                 BIF_view3d_previewrender_signal(curarea, PR_DISPRECT);
1249         else if(strcmp(block->name, "image_panel_preview")==0)
1250                 image_preview_event(2); */
1251 }
1252