cea7b12a27ddee551f972fb98b42c00d02df4fa1
[blender.git] / source / blender / editors / screen / area.c
1 /*
2  * ***** BEGIN GPL LICENSE BLOCK *****
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * as published by the Free Software Foundation; either version 2
7  * of the License, or (at your option) any later version. 
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software Foundation,
16  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17  *
18  * The Original Code is Copyright (C) 2008 Blender Foundation.
19  * All rights reserved.
20  *
21  * 
22  * Contributor(s): Blender Foundation
23  *
24  * ***** END GPL LICENSE BLOCK *****
25  */
26
27 /** \file blender/editors/screen/area.c
28  *  \ingroup edscr
29  */
30
31
32 #include <string.h>
33 #include <stdio.h>
34
35 #include "MEM_guardedalloc.h"
36
37 #include "DNA_userdef_types.h"
38
39 #include "BLI_blenlib.h"
40 #include "BLI_math.h"
41 #include "BLI_rand.h"
42 #include "BLI_utildefines.h"
43
44 #include "BLF_translation.h"
45
46 #include "BKE_context.h"
47 #include "BKE_global.h"
48 #include "BKE_screen.h"
49
50 #include "WM_api.h"
51 #include "WM_types.h"
52 #include "wm_subwindow.h"
53
54 #include "ED_screen.h"
55 #include "ED_screen_types.h"
56 #include "ED_space_api.h"
57 #include "ED_types.h"
58 #include "ED_fileselect.h" 
59
60 #include "BIF_gl.h"
61 #include "BIF_glutil.h"
62 #include "BLF_api.h"
63
64 #include "UI_interface.h"
65 #include "UI_resources.h"
66 #include "UI_view2d.h"
67
68 #include "screen_intern.h"
69
70 /* general area and region code */
71
72 static void region_draw_emboss(ARegion *ar, rcti *scirct)
73 {
74         rcti rect;
75         
76         /* translate scissor rect to region space */
77         rect.xmin = scirct->xmin - ar->winrct.xmin;
78         rect.ymin = scirct->ymin - ar->winrct.ymin;
79         rect.xmax = scirct->xmax - ar->winrct.xmin;
80         rect.ymax = scirct->ymax - ar->winrct.ymin;
81         
82         /* set transp line */
83         glEnable(GL_BLEND);
84         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
85         
86         /* right  */
87         glColor4ub(0, 0, 0, 30);
88         sdrawline(rect.xmax, rect.ymin, rect.xmax, rect.ymax);
89         
90         /* bottom  */
91         glColor4ub(0, 0, 0, 30);
92         sdrawline(rect.xmin, rect.ymin, rect.xmax, rect.ymin);
93         
94         /* top  */
95         glColor4ub(255, 255, 255, 30);
96         sdrawline(rect.xmin, rect.ymax, rect.xmax, rect.ymax);
97
98         /* left  */
99         glColor4ub(255, 255, 255, 30);
100         sdrawline(rect.xmin, rect.ymin, rect.xmin, rect.ymax);
101         
102         glDisable(GL_BLEND);
103 }
104
105 void ED_region_pixelspace(ARegion *ar)
106 {
107         int width  = BLI_rcti_size_x(&ar->winrct) + 1;
108         int height = BLI_rcti_size_y(&ar->winrct) + 1;
109         
110         wmOrtho2(-GLA_PIXEL_OFS, (float)width - GLA_PIXEL_OFS, -GLA_PIXEL_OFS, (float)height - GLA_PIXEL_OFS);
111         glLoadIdentity();
112 }
113
114 /* only exported for WM */
115 void ED_region_do_listen(ARegion *ar, wmNotifier *note)
116 {
117         /* generic notes first */
118         switch (note->category) {
119                 case NC_WM:
120                         if (note->data == ND_FILEREAD)
121                                 ED_region_tag_redraw(ar);
122                         break;
123                 case NC_WINDOW:
124                         ED_region_tag_redraw(ar);
125                         break;
126         }
127
128         if (ar->type && ar->type->listener)
129                 ar->type->listener(ar, note);
130 }
131
132 /* only exported for WM */
133 void ED_area_do_listen(ScrArea *sa, wmNotifier *note)
134 {
135         /* no generic notes? */
136         if (sa->type && sa->type->listener) {
137                 sa->type->listener(sa, note);
138         }
139 }
140
141 /* only exported for WM */
142 void ED_area_do_refresh(bContext *C, ScrArea *sa)
143 {
144         /* no generic notes? */
145         if (sa->type && sa->type->refresh) {
146                 sa->type->refresh(C, sa);
147         }
148         sa->do_refresh = FALSE;
149 }
150
151 /* based on screen region draw tags, set draw tags in azones, and future region tabs etc */
152 /* only exported for WM */
153 void ED_area_overdraw_flush(ScrArea *sa, ARegion *ar)
154 {
155         AZone *az;
156         
157         for (az = sa->actionzones.first; az; az = az->next) {
158                 int xs, ys;
159                 
160                 xs = (az->x1 + az->x2) / 2;
161                 ys = (az->y1 + az->y2) / 2;
162
163                 /* test if inside */
164                 if (BLI_rcti_isect_pt(&ar->winrct, xs, ys)) {
165                         az->do_draw = TRUE;
166                 }
167         }
168 }
169
170 /**
171  * \brief Corner widgets use for dragging and splitting the view.
172  */
173 static void area_draw_azone(short x1, short y1, short x2, short y2)
174 {
175         int dx = x2 - x1;
176         int dy = y2 - y1;
177
178         dx = copysign(ceilf(0.3f * fabsf(dx)), dx);
179         dy = copysign(ceilf(0.3f * fabsf(dy)), dy);
180
181         glEnable(GL_BLEND);
182         glEnable(GL_LINE_SMOOTH);
183         
184         glColor4ub(255, 255, 255, 180);
185         fdrawline(x1, y2, x2, y1);
186         glColor4ub(255, 255, 255, 130);
187         fdrawline(x1, y2 - dy, x2 - dx, y1);
188         glColor4ub(255, 255, 255, 80);
189         fdrawline(x1, y2 - 2 * dy, x2 - 2 * dx, y1);
190         
191         glColor4ub(0, 0, 0, 210);
192         fdrawline(x1, y2 + 1, x2 + 1, y1);
193         glColor4ub(0, 0, 0, 180);
194         fdrawline(x1, y2 - dy + 1, x2 - dx + 1, y1);
195         glColor4ub(0, 0, 0, 150);
196         fdrawline(x1, y2 - 2 * dy + 1, x2 - 2 * dx + 1, y1);
197
198         glDisable(GL_LINE_SMOOTH);
199         glDisable(GL_BLEND);
200 }
201
202 static void region_draw_azone_icon(AZone *az)
203 {
204         GLUquadricObj *qobj = NULL; 
205         short midx = az->x1 + (az->x2 - az->x1) / 2;
206         short midy = az->y1 + (az->y2 - az->y1) / 2;
207                 
208         qobj = gluNewQuadric();
209         
210         glPushMatrix();
211         glTranslatef(midx, midy, 0.0);
212         
213         /* outlined circle */
214         glEnable(GL_LINE_SMOOTH);
215
216         glColor4f(1.f, 1.f, 1.f, 0.8f);
217
218         gluQuadricDrawStyle(qobj, GLU_FILL); 
219         gluDisk(qobj, 0.0,  4.25f, 16, 1);
220
221         glColor4f(0.2f, 0.2f, 0.2f, 0.9f);
222         
223         gluQuadricDrawStyle(qobj, GLU_SILHOUETTE); 
224         gluDisk(qobj, 0.0,  4.25f, 16, 1);
225         
226         glDisable(GL_LINE_SMOOTH);
227         
228         glPopMatrix();
229         gluDeleteQuadric(qobj);
230         
231         /* + */
232         sdrawline(midx, midy - 2, midx, midy + 3);
233         sdrawline(midx - 2, midy, midx + 3, midy);
234 }
235
236 static void draw_azone_plus(float x1, float y1, float x2, float y2)
237 {
238         float width = 0.1f * U.widget_unit;
239         float pad = 0.2f * U.widget_unit;
240         
241         glRectf((x1 + x2 - width) * 0.5f, y1 + pad, (x1 + x2 + width) * 0.5f, y2 - pad);
242         glRectf(x1 + pad, (y1 + y2 - width) * 0.5f, (x1 + x2 - width) * 0.5f, (y1 + y2 + width) * 0.5f);
243         glRectf((x1 + x2 + width) * 0.5f, (y1 + y2 - width) * 0.5f, x2 - pad, (y1 + y2 + width) * 0.5f);
244 }
245
246 static void region_draw_azone_tab_plus(AZone *az)
247 {
248         extern void ui_draw_anti_tria(float x1, float y1, float x2, float y2, float x3, float y3); /* xxx temp */
249         
250         glEnable(GL_BLEND);
251         
252         /* add code to draw region hidden as 'too small' */
253         switch (az->edge) {
254                 case AE_TOP_TO_BOTTOMRIGHT:
255                         uiSetRoundBox(UI_CNR_TOP_LEFT | UI_CNR_TOP_RIGHT);
256                         break;
257                 case AE_BOTTOM_TO_TOPLEFT:
258                         uiSetRoundBox(UI_CNR_BOTTOM_RIGHT | UI_CNR_BOTTOM_LEFT);
259                         break;
260                 case AE_LEFT_TO_TOPRIGHT:
261                         uiSetRoundBox(UI_CNR_TOP_LEFT | UI_CNR_BOTTOM_LEFT);
262                         break;
263                 case AE_RIGHT_TO_TOPLEFT:
264                         uiSetRoundBox(UI_CNR_TOP_RIGHT | UI_CNR_BOTTOM_RIGHT);
265                         break;
266         }
267
268         glColor4f(0.05f, 0.05f, 0.05f, 0.4f);
269         uiRoundBox((float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f);
270
271         glEnable(GL_BLEND);
272
273         glColor4f(0.8f, 0.8f, 0.8f, 0.4f);
274         draw_azone_plus((float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2);
275
276         glDisable(GL_BLEND);
277 }
278
279 static void region_draw_azone_tab(AZone *az)
280 {
281         float col[3];
282         
283         glEnable(GL_BLEND);
284         UI_GetThemeColor3fv(TH_HEADER, col);
285         glColor4f(col[0], col[1], col[2], 0.5f);
286         
287         /* add code to draw region hidden as 'too small' */
288         switch (az->edge) {
289                 case AE_TOP_TO_BOTTOMRIGHT:
290                         uiSetRoundBox(UI_CNR_TOP_LEFT | UI_CNR_TOP_RIGHT | UI_RB_ALPHA);
291                         
292                         uiDrawBoxShade(GL_POLYGON, (float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f, -0.3f, 0.05f);
293                         glColor4ub(0, 0, 0, 255);
294                         uiRoundRect((float)az->x1, 0.3f + (float)az->y1, (float)az->x2, 0.3f + (float)az->y2, 4.0f);
295                         break;
296                 case AE_BOTTOM_TO_TOPLEFT:
297                         uiSetRoundBox(UI_CNR_BOTTOM_RIGHT | UI_CNR_BOTTOM_LEFT | UI_RB_ALPHA);
298                         
299                         uiDrawBoxShade(GL_POLYGON, (float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f, -0.3f, 0.05f);
300                         glColor4ub(0, 0, 0, 255);
301                         uiRoundRect((float)az->x1, 0.3f + (float)az->y1, (float)az->x2, 0.3f + (float)az->y2, 4.0f);
302                         break;
303                 case AE_LEFT_TO_TOPRIGHT:
304                         uiSetRoundBox(UI_CNR_TOP_LEFT | UI_CNR_BOTTOM_LEFT | UI_RB_ALPHA);
305                         
306                         uiDrawBoxShade(GL_POLYGON, (float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f, -0.3f, 0.05f);
307                         glColor4ub(0, 0, 0, 255);
308                         uiRoundRect((float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f);
309                         break;
310                 case AE_RIGHT_TO_TOPLEFT:
311                         uiSetRoundBox(UI_CNR_TOP_RIGHT | UI_CNR_BOTTOM_RIGHT | UI_RB_ALPHA);
312                         
313                         uiDrawBoxShade(GL_POLYGON, (float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f, -0.3f, 0.05f);
314                         glColor4ub(0, 0, 0, 255);
315                         uiRoundRect((float)az->x1, (float)az->y1, (float)az->x2, (float)az->y2, 4.0f);
316                         break;
317         }
318         
319         glDisable(GL_BLEND);
320 }
321
322 static void region_draw_azone_tria(AZone *az)
323 {
324         extern void ui_draw_anti_tria(float x1, float y1, float x2, float y2, float x3, float y3); /* xxx temp */
325         
326         glEnable(GL_BLEND);
327         //UI_GetThemeColor3fv(TH_HEADER, col);
328         glColor4f(0.0f, 0.0f, 0.0f, 0.35f);
329         
330         /* add code to draw region hidden as 'too small' */
331         switch (az->edge) {
332                 case AE_TOP_TO_BOTTOMRIGHT:
333                         ui_draw_anti_tria((float)az->x1, (float)az->y1, (float)az->x2, (float)az->y1, (float)(az->x1 + az->x2) / 2, (float)az->y2);
334                         break;
335                         
336                 case AE_BOTTOM_TO_TOPLEFT:
337                         ui_draw_anti_tria((float)az->x1, (float)az->y2, (float)az->x2, (float)az->y2, (float)(az->x1 + az->x2) / 2, (float)az->y1);
338                         break;
339
340                 case AE_LEFT_TO_TOPRIGHT:
341                         ui_draw_anti_tria((float)az->x2, (float)az->y1, (float)az->x2, (float)az->y2, (float)az->x1, (float)(az->y1 + az->y2) / 2);
342                         break;
343                         
344                 case AE_RIGHT_TO_TOPLEFT:
345                         ui_draw_anti_tria((float)az->x1, (float)az->y1, (float)az->x1, (float)az->y2, (float)az->x2, (float)(az->y1 + az->y2) / 2);
346                         break;
347                         
348         }
349         
350         glDisable(GL_BLEND);
351 }
352
353 /* only exported for WM */
354 void ED_area_overdraw(bContext *C)
355 {
356         wmWindow *win = CTX_wm_window(C);
357         bScreen *screen = CTX_wm_screen(C);
358         ScrArea *sa;
359         
360         /* Draw AZones, in screenspace */
361         wmSubWindowSet(win, screen->mainwin);
362
363         glEnable(GL_BLEND);
364         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
365         
366         for (sa = screen->areabase.first; sa; sa = sa->next) {
367                 AZone *az;
368                 for (az = sa->actionzones.first; az; az = az->next) {
369                         if (az->do_draw) {
370                                 if (az->type == AZONE_AREA) {
371                                         area_draw_azone(az->x1, az->y1, az->x2, az->y2);
372                                 }
373                                 else if (az->type == AZONE_REGION) {
374                                         
375                                         if (az->ar) {
376                                                 /* only display tab or icons when the region is hidden */
377                                                 if (az->ar->flag & (RGN_FLAG_HIDDEN | RGN_FLAG_TOO_SMALL)) {
378                                                         if (G.debug_value == 3)
379                                                                 region_draw_azone_icon(az);
380                                                         else if (G.debug_value == 2)
381                                                                 region_draw_azone_tria(az);
382                                                         else if (G.debug_value == 1)
383                                                                 region_draw_azone_tab(az);
384                                                         else
385                                                                 region_draw_azone_tab_plus(az);
386                                                 }
387                                         }
388                                 }
389                                 
390                                 az->do_draw = FALSE;
391                         }
392                 }
393         }
394         glDisable(GL_BLEND);
395         
396 }
397
398 /* only exported for WM */
399 /* makes region ready for drawing, sets pixelspace */
400 void ED_region_set(const bContext *C, ARegion *ar)
401 {
402         wmWindow *win = CTX_wm_window(C);
403         ScrArea *sa = CTX_wm_area(C);
404         
405         ar->drawrct = ar->winrct;
406         
407         /* note; this sets state, so we can use wmOrtho and friends */
408         wmSubWindowScissorSet(win, ar->swinid, &ar->drawrct);
409         
410         UI_SetTheme(sa ? sa->spacetype : 0, ar->type ? ar->type->regionid : 0);
411         
412         ED_region_pixelspace(ar);
413 }
414
415
416 /* only exported for WM */
417 void ED_region_do_draw(bContext *C, ARegion *ar)
418 {
419         wmWindow *win = CTX_wm_window(C);
420         ScrArea *sa = CTX_wm_area(C);
421         ARegionType *at = ar->type;
422         
423         /* see BKE_spacedata_draw_locks() */
424         if (at->do_lock)
425                 return;
426         
427         /* if no partial draw rect set, full rect */
428         if (ar->drawrct.xmin == ar->drawrct.xmax)
429                 ar->drawrct = ar->winrct;
430         else {
431                 /* extra clip for safety (intersect the rects, could use API func) */
432                 ar->drawrct.xmin = max_ii(ar->winrct.xmin, ar->drawrct.xmin);
433                 ar->drawrct.ymin = max_ii(ar->winrct.ymin, ar->drawrct.ymin);
434                 ar->drawrct.xmax = min_ii(ar->winrct.xmax, ar->drawrct.xmax);
435                 ar->drawrct.ymax = min_ii(ar->winrct.ymax, ar->drawrct.ymax);
436         }
437         
438         /* note; this sets state, so we can use wmOrtho and friends */
439         wmSubWindowScissorSet(win, ar->swinid, &ar->drawrct);
440         
441         UI_SetTheme(sa ? sa->spacetype : 0, ar->type ? ar->type->regionid : 0);
442         
443         /* optional header info instead? */
444         if (ar->headerstr) {
445                 UI_ThemeClearColor(TH_HEADER);
446                 glClear(GL_COLOR_BUFFER_BIT);
447                 
448                 UI_ThemeColor(TH_TEXT);
449                 BLF_draw_default(20, 8, 0.0f, ar->headerstr, BLF_DRAW_STR_DUMMY_MAX);
450         }
451         else if (at->draw) {
452                 at->draw(C, ar);
453         }
454
455         /* XXX test: add convention to end regions always in pixel space, for drawing of borders/gestures etc */
456         ED_region_pixelspace(ar);
457
458         ED_region_draw_cb_draw(C, ar, REGION_DRAW_POST_PIXEL);
459
460         ar->do_draw = FALSE;
461         memset(&ar->drawrct, 0, sizeof(ar->drawrct));
462         
463         uiFreeInactiveBlocks(C, &ar->uiblocks);
464
465         if (sa)
466                 region_draw_emboss(ar, &ar->winrct);
467 }
468
469 /* **********************************
470  * maybe silly, but let's try for now
471  * to keep these tags protected
472  * ********************************** */
473
474 void ED_region_tag_redraw(ARegion *ar)
475 {
476         if (ar) {
477                 /* zero region means full region redraw */
478                 ar->do_draw = RGN_DRAW;
479                 memset(&ar->drawrct, 0, sizeof(ar->drawrct));
480         }
481 }
482
483 void ED_region_tag_redraw_overlay(ARegion *ar)
484 {
485         if (ar)
486                 ar->do_draw_overlay = RGN_DRAW;
487 }
488
489 void ED_region_tag_redraw_partial(ARegion *ar, rcti *rct)
490 {
491         if (ar) {
492                 if (!ar->do_draw) {
493                         /* no redraw set yet, set partial region */
494                         ar->do_draw = RGN_DRAW_PARTIAL;
495                         ar->drawrct = *rct;
496                 }
497                 else if (ar->drawrct.xmin != ar->drawrct.xmax) {
498                         /* partial redraw already set, expand region */
499                         BLI_rcti_union(&ar->drawrct, rct);
500                 }
501         }
502 }
503
504 void ED_area_tag_redraw(ScrArea *sa)
505 {
506         ARegion *ar;
507         
508         if (sa)
509                 for (ar = sa->regionbase.first; ar; ar = ar->next)
510                         ED_region_tag_redraw(ar);
511 }
512
513 void ED_area_tag_redraw_regiontype(ScrArea *sa, int regiontype)
514 {
515         ARegion *ar;
516         
517         if (sa) {
518                 for (ar = sa->regionbase.first; ar; ar = ar->next) {
519                         if (ar->regiontype == regiontype) {
520                                 ED_region_tag_redraw(ar);
521                         }
522                 }
523         }
524 }
525
526 void ED_area_tag_refresh(ScrArea *sa)
527 {
528         if (sa)
529                 sa->do_refresh = TRUE;
530 }
531
532 /* *************************************************************** */
533
534 /* use NULL to disable it */
535 void ED_area_headerprint(ScrArea *sa, const char *str)
536 {
537         ARegion *ar;
538
539         /* happens when running transform operators in backround mode */
540         if (sa == NULL)
541                 return;
542
543         for (ar = sa->regionbase.first; ar; ar = ar->next) {
544                 if (ar->regiontype == RGN_TYPE_HEADER) {
545                         if (str) {
546                                 if (ar->headerstr == NULL)
547                                         ar->headerstr = MEM_mallocN(256, "headerprint");
548                                 BLI_strncpy(ar->headerstr, str, 256);
549                         }
550                         else if (ar->headerstr) {
551                                 MEM_freeN(ar->headerstr);
552                                 ar->headerstr = NULL;
553                         }
554                         ED_region_tag_redraw(ar);
555                 }
556         }
557 }
558
559 /* ************************************************************ */
560
561
562 static void area_azone_initialize(bScreen *screen, ScrArea *sa)
563 {
564         AZone *az;
565         
566         /* reinitalize entirely, regions add azones too */
567         BLI_freelistN(&sa->actionzones);
568
569         if (screen->full != SCREENNORMAL) {
570                 return;
571         }
572
573         /* set area action zones */
574         az = (AZone *)MEM_callocN(sizeof(AZone), "actionzone");
575         BLI_addtail(&(sa->actionzones), az);
576         az->type = AZONE_AREA;
577         az->x1 = sa->totrct.xmin;
578         az->y1 = sa->totrct.ymin;
579         az->x2 = sa->totrct.xmin + (AZONESPOT - 1);
580         az->y2 = sa->totrct.ymin + (AZONESPOT - 1);
581         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
582         
583         az = (AZone *)MEM_callocN(sizeof(AZone), "actionzone");
584         BLI_addtail(&(sa->actionzones), az);
585         az->type = AZONE_AREA;
586         az->x1 = sa->totrct.xmax + 1;
587         az->y1 = sa->totrct.ymax + 1;
588         az->x2 = sa->totrct.xmax - (AZONESPOT - 1);
589         az->y2 = sa->totrct.ymax - (AZONESPOT - 1);
590         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
591 }
592
593 #define AZONEPAD_EDGE   (0.2f * U.widget_unit)
594 #define AZONEPAD_ICON   (0.45f * U.widget_unit)
595 static void region_azone_edge(AZone *az, ARegion *ar)
596 {
597         switch (az->edge) {
598                 case AE_TOP_TO_BOTTOMRIGHT:
599                         az->x1 = ar->winrct.xmin;
600                         az->y1 = ar->winrct.ymax - AZONEPAD_EDGE;
601                         az->x2 = ar->winrct.xmax;
602                         az->y2 = ar->winrct.ymax;
603                         break;
604                 case AE_BOTTOM_TO_TOPLEFT:
605                         az->x1 = ar->winrct.xmin;
606                         az->y1 = ar->winrct.ymin + AZONEPAD_EDGE;
607                         az->x2 = ar->winrct.xmax;
608                         az->y2 = ar->winrct.ymin;
609                         break;
610                 case AE_LEFT_TO_TOPRIGHT:
611                         az->x1 = ar->winrct.xmin;
612                         az->y1 = ar->winrct.ymin;
613                         az->x2 = ar->winrct.xmin + AZONEPAD_EDGE;
614                         az->y2 = ar->winrct.ymax;
615                         break;
616                 case AE_RIGHT_TO_TOPLEFT:
617                         az->x1 = ar->winrct.xmax;
618                         az->y1 = ar->winrct.ymin;
619                         az->x2 = ar->winrct.xmax - AZONEPAD_EDGE;
620                         az->y2 = ar->winrct.ymax;
621                         break;
622         }
623
624         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
625 }
626
627 static void region_azone_icon(ScrArea *sa, AZone *az, ARegion *ar)
628 {
629         AZone *azt;
630         int tot = 0;
631         
632         /* count how many actionzones with along same edge are available.
633          * This allows for adding more action zones in the future without
634          * having to worry about correct offset */
635         for (azt = sa->actionzones.first; azt; azt = azt->next) {
636                 if (azt->edge == az->edge) tot++;
637         }
638         
639         switch (az->edge) {
640                 case AE_TOP_TO_BOTTOMRIGHT:
641                         az->x1 = ar->winrct.xmax - tot * 2 * AZONEPAD_ICON;
642                         az->y1 = ar->winrct.ymax + AZONEPAD_ICON;
643                         az->x2 = ar->winrct.xmax - tot * AZONEPAD_ICON;
644                         az->y2 = ar->winrct.ymax + 2 * AZONEPAD_ICON;
645                         break;
646                 case AE_BOTTOM_TO_TOPLEFT:
647                         az->x1 = ar->winrct.xmin + AZONEPAD_ICON;
648                         az->y1 = ar->winrct.ymin - 2 * AZONEPAD_ICON;
649                         az->x2 = ar->winrct.xmin + 2 * AZONEPAD_ICON;
650                         az->y2 = ar->winrct.ymin - AZONEPAD_ICON;
651                         break;
652                 case AE_LEFT_TO_TOPRIGHT:
653                         az->x1 = ar->winrct.xmin - 2 * AZONEPAD_ICON;
654                         az->y1 = ar->winrct.ymax - tot * 2 * AZONEPAD_ICON;
655                         az->x2 = ar->winrct.xmin - AZONEPAD_ICON;
656                         az->y2 = ar->winrct.ymax - tot * AZONEPAD_ICON;
657                         break;
658                 case AE_RIGHT_TO_TOPLEFT:
659                         az->x1 = ar->winrct.xmax + AZONEPAD_ICON;
660                         az->y1 = ar->winrct.ymax - tot * 2 * AZONEPAD_ICON;
661                         az->x2 = ar->winrct.xmax + 2 * AZONEPAD_ICON;
662                         az->y2 = ar->winrct.ymax - tot * AZONEPAD_ICON;
663                         break;
664         }
665
666         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
667         
668         /* if more azones on 1 spot, set offset */
669         for (azt = sa->actionzones.first; azt; azt = azt->next) {
670                 if (az != azt) {
671                         if (ABS(az->x1 - azt->x1) < 2 && ABS(az->y1 - azt->y1) < 2) {
672                                 if (az->edge == AE_TOP_TO_BOTTOMRIGHT || az->edge == AE_BOTTOM_TO_TOPLEFT) {
673                                         az->x1 += AZONESPOT;
674                                         az->x2 += AZONESPOT;
675                                 }
676                                 else {
677                                         az->y1 -= AZONESPOT;
678                                         az->y2 -= AZONESPOT;
679                                 }
680                                 BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
681                         }
682                 }
683         }
684 }
685
686 #define AZONEPAD_TAB_PLUSW  (0.7f * U.widget_unit)
687 #define AZONEPAD_TAB_PLUSH  (0.7f * U.widget_unit)
688
689 /* region already made zero sized, in shape of edge */
690 static void region_azone_tab_plus(ScrArea *sa, AZone *az, ARegion *ar)
691 {
692         AZone *azt;
693         int tot = 0, add;
694         
695         for (azt = sa->actionzones.first; azt; azt = azt->next) {
696                 if (azt->edge == az->edge) tot++;
697         }
698         
699         switch (az->edge) {
700                 case AE_TOP_TO_BOTTOMRIGHT:
701                         if (ar->winrct.ymax == sa->totrct.ymin) add = 1; else add = 0;
702                         az->x1 = ar->winrct.xmax - 2.5f * AZONEPAD_TAB_PLUSW;
703                         az->y1 = ar->winrct.ymax - add;
704                         az->x2 = ar->winrct.xmax - 1.5f * AZONEPAD_TAB_PLUSW;
705                         az->y2 = ar->winrct.ymax - add + AZONEPAD_TAB_PLUSH;
706                         break;
707                 case AE_BOTTOM_TO_TOPLEFT:
708                         az->x1 = ar->winrct.xmax - 2.5f * AZONEPAD_TAB_PLUSW;
709                         az->y1 = ar->winrct.ymin - AZONEPAD_TAB_PLUSH;
710                         az->x2 = ar->winrct.xmax - 1.5f * AZONEPAD_TAB_PLUSW;
711                         az->y2 = ar->winrct.ymin;
712                         break;
713                 case AE_LEFT_TO_TOPRIGHT:
714                         az->x1 = ar->winrct.xmin - AZONEPAD_TAB_PLUSH;
715                         az->y1 = ar->winrct.ymax - 2.5f * AZONEPAD_TAB_PLUSW;
716                         az->x2 = ar->winrct.xmin;
717                         az->y2 = ar->winrct.ymax - 1.5f * AZONEPAD_TAB_PLUSW;
718                         break;
719                 case AE_RIGHT_TO_TOPLEFT:
720                         az->x1 = ar->winrct.xmax - 1;
721                         az->y1 = ar->winrct.ymax - 2.5f * AZONEPAD_TAB_PLUSW;
722                         az->x2 = ar->winrct.xmax - 1 + AZONEPAD_TAB_PLUSH;
723                         az->y2 = ar->winrct.ymax - 1.5f * AZONEPAD_TAB_PLUSW;
724                         break;
725         }
726         /* rect needed for mouse pointer test */
727         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
728 }       
729
730
731 #define AZONEPAD_TABW   (0.9f * U.widget_unit)
732 #define AZONEPAD_TABH   (0.35f * U.widget_unit)
733
734 /* region already made zero sized, in shape of edge */
735 static void region_azone_tab(ScrArea *sa, AZone *az, ARegion *ar)
736 {
737         AZone *azt;
738         int tot = 0, add;
739         
740         for (azt = sa->actionzones.first; azt; azt = azt->next) {
741                 if (azt->edge == az->edge) tot++;
742         }
743         
744         switch (az->edge) {
745                 case AE_TOP_TO_BOTTOMRIGHT:
746                         if (ar->winrct.ymax == sa->totrct.ymin) add = 1; else add = 0;
747                         az->x1 = ar->winrct.xmax - 2 * AZONEPAD_TABW;
748                         az->y1 = ar->winrct.ymax - add;
749                         az->x2 = ar->winrct.xmax - AZONEPAD_TABW;
750                         az->y2 = ar->winrct.ymax - add + AZONEPAD_TABH;
751                         break;
752                 case AE_BOTTOM_TO_TOPLEFT:
753                         az->x1 = ar->winrct.xmin + AZONEPAD_TABW;
754                         az->y1 = ar->winrct.ymin - AZONEPAD_TABH;
755                         az->x2 = ar->winrct.xmin + 2 * AZONEPAD_TABW;
756                         az->y2 = ar->winrct.ymin;
757                         break;
758                 case AE_LEFT_TO_TOPRIGHT:
759                         az->x1 = ar->winrct.xmin + 1 - AZONEPAD_TABH;
760                         az->y1 = ar->winrct.ymax - 2 * AZONEPAD_TABW;
761                         az->x2 = ar->winrct.xmin + 1;
762                         az->y2 = ar->winrct.ymax - AZONEPAD_TABW;
763                         break;
764                 case AE_RIGHT_TO_TOPLEFT:
765                         az->x1 = ar->winrct.xmax - 1;
766                         az->y1 = ar->winrct.ymax - 2 * AZONEPAD_TABW;
767                         az->x2 = ar->winrct.xmax - 1 + AZONEPAD_TABH;
768                         az->y2 = ar->winrct.ymax - AZONEPAD_TABW;
769                         break;
770         }
771         /* rect needed for mouse pointer test */
772         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
773 }       
774
775 #define AZONEPAD_TRIAW  (0.8f * U.widget_unit)
776 #define AZONEPAD_TRIAH  (0.45f * U.widget_unit)
777
778
779 /* region already made zero sized, in shape of edge */
780 static void region_azone_tria(ScrArea *sa, AZone *az, ARegion *ar)
781 {
782         AZone *azt;
783         int tot = 0, add;
784         
785         for (azt = sa->actionzones.first; azt; azt = azt->next) {
786                 if (azt->edge == az->edge) tot++;
787         }
788         
789         switch (az->edge) {
790                 case AE_TOP_TO_BOTTOMRIGHT:
791                         if (ar->winrct.ymax == sa->totrct.ymin) add = 1; else add = 0;
792                         az->x1 = ar->winrct.xmax - 2 * AZONEPAD_TRIAW;
793                         az->y1 = ar->winrct.ymax - add;
794                         az->x2 = ar->winrct.xmax - AZONEPAD_TRIAW;
795                         az->y2 = ar->winrct.ymax - add + AZONEPAD_TRIAH;
796                         break;
797                 case AE_BOTTOM_TO_TOPLEFT:
798                         az->x1 = ar->winrct.xmin + AZONEPAD_TRIAW;
799                         az->y1 = ar->winrct.ymin - AZONEPAD_TRIAH;
800                         az->x2 = ar->winrct.xmin + 2 * AZONEPAD_TRIAW;
801                         az->y2 = ar->winrct.ymin;
802                         break;
803                 case AE_LEFT_TO_TOPRIGHT:
804                         az->x1 = ar->winrct.xmin + 1 - AZONEPAD_TRIAH;
805                         az->y1 = ar->winrct.ymax - 2 * AZONEPAD_TRIAW;
806                         az->x2 = ar->winrct.xmin + 1;
807                         az->y2 = ar->winrct.ymax - AZONEPAD_TRIAW;
808                         break;
809                 case AE_RIGHT_TO_TOPLEFT:
810                         az->x1 = ar->winrct.xmax - 1;
811                         az->y1 = ar->winrct.ymax - 2 * AZONEPAD_TRIAW;
812                         az->x2 = ar->winrct.xmax - 1 + AZONEPAD_TRIAH;
813                         az->y2 = ar->winrct.ymax - AZONEPAD_TRIAW;
814                         break;
815         }
816         /* rect needed for mouse pointer test */
817         BLI_rcti_init(&az->rect, az->x1, az->x2, az->y1, az->y2);
818 }       
819
820
821 static void region_azone_initialize(ScrArea *sa, ARegion *ar, AZEdge edge) 
822 {
823         AZone *az;
824         
825         az = (AZone *)MEM_callocN(sizeof(AZone), "actionzone");
826         BLI_addtail(&(sa->actionzones), az);
827         az->type = AZONE_REGION;
828         az->ar = ar;
829         az->edge = edge;
830         
831         if (ar->flag & (RGN_FLAG_HIDDEN | RGN_FLAG_TOO_SMALL)) {
832                 if (G.debug_value == 3)
833                         region_azone_icon(sa, az, ar);
834                 else if (G.debug_value == 2)
835                         region_azone_tria(sa, az, ar);
836                 else if (G.debug_value == 1)
837                         region_azone_tab(sa, az, ar);
838                 else
839                         region_azone_tab_plus(sa, az, ar);
840         }
841         else {
842                 region_azone_edge(az, ar);
843         }
844         
845 }
846
847
848 /* *************************************************************** */
849
850 static void region_azone_add(ScrArea *sa, ARegion *ar, int alignment)
851 {
852         /* edge code (t b l r) is along which area edge azone will be drawn */
853         
854         if (alignment == RGN_ALIGN_TOP)
855                 region_azone_initialize(sa, ar, AE_BOTTOM_TO_TOPLEFT);
856         else if (alignment == RGN_ALIGN_BOTTOM)
857                 region_azone_initialize(sa, ar, AE_TOP_TO_BOTTOMRIGHT);
858         else if (alignment == RGN_ALIGN_RIGHT)
859                 region_azone_initialize(sa, ar, AE_LEFT_TO_TOPRIGHT);
860         else if (alignment == RGN_ALIGN_LEFT)
861                 region_azone_initialize(sa, ar, AE_RIGHT_TO_TOPLEFT);
862 }
863
864 /* dir is direction to check, not the splitting edge direction! */
865 static int rct_fits(rcti *rect, char dir, int size)
866 {
867         if (dir == 'h') {
868                 return BLI_rcti_size_x(rect) - size;
869         }
870         else {  /* 'v' */
871                 return BLI_rcti_size_y(rect) - size;
872         }
873 }
874
875 /* *************************************************************** */
876
877 /* ar should be overlapping */
878 /* function checks if some overlapping region was defined before - on same place */
879 static void region_overlap_fix(ScrArea *sa, ARegion *ar)
880 {
881         ARegion *ar1 = ar->prev;
882         
883         /* find overlapping previous region on same place */
884         while (ar1) {
885                 if (ar1->overlap) {
886                         if ((ar1->alignment & RGN_SPLIT_PREV) == 0)
887                                 if (BLI_rcti_isect(&ar1->winrct, &ar->winrct, NULL))
888                                         break;
889                 }
890                 ar1 = ar1->prev;
891         }
892         
893         /* translate or close */
894         if (ar1) {
895                 int align1 = ar1->alignment & ~RGN_SPLIT_PREV;
896
897                 if (align1 == RGN_ALIGN_LEFT) {
898                         if (ar->winrct.xmax + ar1->winx > sa->winx - U.widget_unit)
899                                 ar->flag |= RGN_FLAG_TOO_SMALL;
900                         else
901                                 BLI_rcti_translate(&ar->winrct, ar1->winx, 0);
902                 }
903                 else if (align1 == RGN_ALIGN_RIGHT) {
904                         if (ar->winrct.xmin - ar1->winx < U.widget_unit)
905                                 ar->flag |= RGN_FLAG_TOO_SMALL;
906                         else
907                                 BLI_rcti_translate(&ar->winrct, -ar1->winx, 0);
908                 }
909         }
910
911         
912         
913 }
914
915 /* overlapping regions only in the following restricted cases */
916 static int region_is_overlap(wmWindow *win, ScrArea *sa, ARegion *ar)
917 {
918         if (U.uiflag2 & USER_REGION_OVERLAP)
919                 if (WM_is_draw_triple(win))
920                         if (ELEM4(sa->spacetype, SPACE_VIEW3D, SPACE_IMAGE, SPACE_SEQ, SPACE_CLIP))
921                                 if (ELEM3(ar->regiontype, RGN_TYPE_TOOLS, RGN_TYPE_UI, RGN_TYPE_TOOL_PROPS))
922                                         return 1;
923         return 0;
924 }
925
926 static void region_rect_recursive(wmWindow *win, ScrArea *sa, ARegion *ar, rcti *remainder, int quad)
927 {
928         rcti *remainder_prev = remainder;
929         int prefsizex, prefsizey;
930         int alignment;
931         
932         if (ar == NULL)
933                 return;
934         
935         /* no returns in function, winrct gets set in the end again */
936         BLI_rcti_init(&ar->winrct, 0, 0, 0, 0);
937         
938         /* for test; allow split of previously defined region */
939         if (ar->alignment & RGN_SPLIT_PREV)
940                 if (ar->prev)
941                         remainder = &ar->prev->winrct;
942         
943         alignment = ar->alignment & ~RGN_SPLIT_PREV;
944         
945         /* set here, assuming userpref switching forces to call this again */
946         ar->overlap = region_is_overlap(win, sa, ar);
947
948         /* clear state flags first */
949         ar->flag &= ~RGN_FLAG_TOO_SMALL;
950         /* user errors */
951         if (ar->next == NULL && alignment != RGN_ALIGN_QSPLIT)
952                 alignment = RGN_ALIGN_NONE;
953         
954         /* prefsize, for header we stick to exception (prevent dpi rounding error) */
955         prefsizex = UI_DPI_FAC * (ar->sizex > 1 ? ar->sizex + 0.5f : ar->type->prefsizex);
956         
957         if (ar->regiontype == RGN_TYPE_HEADER) {
958                 prefsizey = ED_area_headersize();
959         }
960         else if (ar->regiontype == RGN_TYPE_UI && sa->spacetype == SPACE_FILE) {
961                 prefsizey = UI_UNIT_Y * 2 + (UI_UNIT_Y / 2);
962         }
963         else {
964                 prefsizey = UI_DPI_FAC * (ar->sizey > 1 ? ar->sizey + 0.5f : ar->type->prefsizey);
965         }
966
967
968         if (ar->flag & RGN_FLAG_HIDDEN) {
969                 /* hidden is user flag */
970         }
971         else if (alignment == RGN_ALIGN_FLOAT) {
972                 /* XXX floating area region, not handled yet here */
973         }
974         else if (rct_fits(remainder, 'v', 1) < 0 || rct_fits(remainder, 'h', 1) < 0) {
975                 /* remainder is too small for any usage */
976                 ar->flag |= RGN_FLAG_TOO_SMALL;
977         }
978         else if (alignment == RGN_ALIGN_NONE) {
979                 /* typically last region */
980                 ar->winrct = *remainder;
981                 BLI_rcti_init(remainder, 0, 0, 0, 0);
982         }
983         else if (alignment == RGN_ALIGN_TOP || alignment == RGN_ALIGN_BOTTOM) {
984                 
985                 if (rct_fits(remainder, 'v', prefsizey) < 0) {
986                         ar->flag |= RGN_FLAG_TOO_SMALL;
987                 }
988                 else {
989                         int fac = rct_fits(remainder, 'v', prefsizey);
990
991                         if (fac < 0)
992                                 prefsizey += fac;
993                         
994                         ar->winrct = *remainder;
995                         
996                         if (alignment == RGN_ALIGN_TOP) {
997                                 ar->winrct.ymin = ar->winrct.ymax - prefsizey + 1;
998                                 remainder->ymax = ar->winrct.ymin - 1;
999                         }
1000                         else {
1001                                 ar->winrct.ymax = ar->winrct.ymin + prefsizey - 1;
1002                                 remainder->ymin = ar->winrct.ymax + 1;
1003                         }
1004                 }
1005         }
1006         else if (ELEM(alignment, RGN_ALIGN_LEFT, RGN_ALIGN_RIGHT)) {
1007                 
1008                 if (rct_fits(remainder, 'h', prefsizex) < 0) {
1009                         ar->flag |= RGN_FLAG_TOO_SMALL;
1010                 }
1011                 else {
1012                         int fac = rct_fits(remainder, 'h', prefsizex);
1013                         
1014                         if (fac < 0)
1015                                 prefsizex += fac;
1016                         
1017                         ar->winrct = *remainder;
1018                         
1019                         if (alignment == RGN_ALIGN_RIGHT) {
1020                                 ar->winrct.xmin = ar->winrct.xmax - prefsizex + 1;
1021                                 if (ar->overlap == 0)
1022                                         remainder->xmax = ar->winrct.xmin - 1;
1023                         }
1024                         else {
1025                                 ar->winrct.xmax = ar->winrct.xmin + prefsizex - 1;
1026                                 if (ar->overlap == 0)
1027                                         remainder->xmin = ar->winrct.xmax + 1;
1028                         }
1029                 }
1030         }
1031         else if (alignment == RGN_ALIGN_VSPLIT || alignment == RGN_ALIGN_HSPLIT) {
1032                 /* percentage subdiv*/
1033                 ar->winrct = *remainder;
1034                 
1035                 if (alignment == RGN_ALIGN_HSPLIT) {
1036                         if (rct_fits(remainder, 'h', prefsizex) > 4) {
1037                                 ar->winrct.xmax = BLI_rcti_cent_x(remainder);
1038                                 remainder->xmin = ar->winrct.xmax + 1;
1039                         }
1040                         else {
1041                                 BLI_rcti_init(remainder, 0, 0, 0, 0);
1042                         }
1043                 }
1044                 else {
1045                         if (rct_fits(remainder, 'v', prefsizey) > 4) {
1046                                 ar->winrct.ymax = BLI_rcti_cent_y(remainder);
1047                                 remainder->ymin = ar->winrct.ymax + 1;
1048                         }
1049                         else {
1050                                 BLI_rcti_init(remainder, 0, 0, 0, 0);
1051                         }
1052                 }
1053         }
1054         else if (alignment == RGN_ALIGN_QSPLIT) {
1055                 ar->winrct = *remainder;
1056                 
1057                 /* test if there's still 4 regions left */
1058                 if (quad == 0) {
1059                         ARegion *artest = ar->next;
1060                         int count = 1;
1061                         
1062                         while (artest) {
1063                                 artest->alignment = RGN_ALIGN_QSPLIT;
1064                                 artest = artest->next;
1065                                 count++;
1066                         }
1067                         
1068                         if (count != 4) {
1069                                 /* let's stop adding regions */
1070                                 BLI_rcti_init(remainder, 0, 0, 0, 0);
1071                                 if (G.debug & G_DEBUG)
1072                                         printf("region quadsplit failed\n");
1073                         }
1074                         else quad = 1;
1075                 }
1076                 if (quad) {
1077                         if (quad == 1) { /* left bottom */
1078                                 ar->winrct.xmax = BLI_rcti_cent_x(remainder);
1079                                 ar->winrct.ymax = BLI_rcti_cent_y(remainder);
1080                         }
1081                         else if (quad == 2) { /* left top */
1082                                 ar->winrct.xmax = BLI_rcti_cent_x(remainder);
1083                                 ar->winrct.ymin = BLI_rcti_cent_y(remainder) + 1;
1084                         }
1085                         else if (quad == 3) { /* right bottom */
1086                                 ar->winrct.xmin = BLI_rcti_cent_x(remainder) + 1;
1087                                 ar->winrct.ymax = BLI_rcti_cent_y(remainder);
1088                         }
1089                         else {  /* right top */
1090                                 ar->winrct.xmin = BLI_rcti_cent_x(remainder) + 1;
1091                                 ar->winrct.ymin = BLI_rcti_cent_y(remainder) + 1;
1092                                 BLI_rcti_init(remainder, 0, 0, 0, 0);
1093                         }
1094
1095                         quad++;
1096                 }
1097         }
1098         
1099         /* for speedup */
1100         ar->winx = BLI_rcti_size_x(&ar->winrct) + 1;
1101         ar->winy = BLI_rcti_size_y(&ar->winrct) + 1;
1102         
1103         /* if region opened normally, we store this for hide/reveal usage */
1104         /* prevent rounding errors for UI_DPI_FAC mult and divide */
1105         if (ar->winx > 1) ar->sizex = (ar->winx + 0.5f) /  UI_DPI_FAC;
1106         if (ar->winy > 1) ar->sizey = (ar->winy + 0.5f) /  UI_DPI_FAC;
1107                 
1108         /* exception for multiple overlapping regions on same spot */
1109         if (ar->overlap)
1110                 region_overlap_fix(sa, ar);
1111
1112         /* set winrect for azones */
1113         if (ar->flag & (RGN_FLAG_HIDDEN | RGN_FLAG_TOO_SMALL)) {
1114                 ar->winrct = *remainder;
1115                 
1116                 if (alignment == RGN_ALIGN_TOP)
1117                         ar->winrct.ymin = ar->winrct.ymax;
1118                 else if (alignment == RGN_ALIGN_BOTTOM)
1119                         ar->winrct.ymax = ar->winrct.ymin;
1120                 else if (alignment == RGN_ALIGN_RIGHT)
1121                         ar->winrct.xmin = ar->winrct.xmax;
1122                 else if (alignment == RGN_ALIGN_LEFT)
1123                         ar->winrct.xmax = ar->winrct.xmin;
1124                 else /* prevent winrct to be valid */
1125                         ar->winrct.xmax = ar->winrct.xmin;
1126         }
1127
1128         /* restore prev-split exception */
1129         if (ar->alignment & RGN_SPLIT_PREV) {
1130                 if (ar->prev) {
1131                         remainder = remainder_prev;
1132                         ar->prev->winx = BLI_rcti_size_x(&ar->prev->winrct) + 1;
1133                         ar->prev->winy = BLI_rcti_size_y(&ar->prev->winrct) + 1;
1134                 }
1135         }
1136         
1137         /* in end, add azones, where appropriate */
1138         if (ar->regiontype == RGN_TYPE_HEADER && ar->winy + 6 > sa->winy) {
1139                 /* The logic for this is: when the header takes up the full area,
1140                  * disallow hiding it to view the main window.
1141                  *
1142                  * Without this, you can drag down the file selectors header and hide it
1143                  * by accident very easily (highly annoying!), the value 6 is arbitrary
1144                  * but accounts for small common rounding problems when scaling the UI,
1145                  * must be minimum '4' */
1146         }
1147         else {
1148                 region_azone_add(sa, ar, alignment);
1149         }
1150
1151         region_rect_recursive(win, sa, ar->next, remainder, quad);
1152 }
1153
1154 static void area_calc_totrct(ScrArea *sa, int sizex, int sizey)
1155 {
1156         short rt = U.pixelsize > 1.0f ? 1 : 0;
1157
1158         if (sa->v1->vec.x > 0) sa->totrct.xmin = sa->v1->vec.x + 1 + rt;
1159         else sa->totrct.xmin = sa->v1->vec.x;
1160         if (sa->v4->vec.x < sizex - 1) sa->totrct.xmax = sa->v4->vec.x - 1 - rt;
1161         else sa->totrct.xmax = sa->v4->vec.x;
1162         
1163         if (sa->v1->vec.y > 0) sa->totrct.ymin = sa->v1->vec.y + 1 + rt;
1164         else sa->totrct.ymin = sa->v1->vec.y;
1165         if (sa->v2->vec.y < sizey - 1) sa->totrct.ymax = sa->v2->vec.y - 1 - rt;
1166         else sa->totrct.ymax = sa->v2->vec.y;
1167         
1168         /* for speedup */
1169         sa->winx = BLI_rcti_size_x(&sa->totrct) + 1;
1170         sa->winy = BLI_rcti_size_y(&sa->totrct) + 1;
1171 }
1172
1173
1174 /* used for area initialize below */
1175 static void region_subwindow(wmWindow *win, ARegion *ar)
1176 {
1177         if (ar->flag & (RGN_FLAG_HIDDEN | RGN_FLAG_TOO_SMALL)) {
1178                 if (ar->swinid)
1179                         wm_subwindow_close(win, ar->swinid);
1180                 ar->swinid = 0;
1181         }
1182         else if (ar->swinid == 0)
1183                 ar->swinid = wm_subwindow_open(win, &ar->winrct);
1184         else 
1185                 wm_subwindow_position(win, ar->swinid, &ar->winrct);
1186 }
1187
1188 static void ed_default_handlers(wmWindowManager *wm, ScrArea *sa, ListBase *handlers, int flag)
1189 {
1190         /* note, add-handler checks if it already exists */
1191         
1192         /* XXX it would be good to have boundbox checks for some of these... */
1193         if (flag & ED_KEYMAP_UI) {
1194                 /* user interface widgets */
1195                 UI_add_region_handlers(handlers);
1196         }
1197         if (flag & ED_KEYMAP_VIEW2D) {
1198                 /* 2d-viewport handling+manipulation */
1199                 wmKeyMap *keymap = WM_keymap_find(wm->defaultconf, "View2D", 0, 0);
1200                 WM_event_add_keymap_handler(handlers, keymap);
1201         }
1202         if (flag & ED_KEYMAP_MARKERS) {
1203                 /* time-markers */
1204                 wmKeyMap *keymap = WM_keymap_find(wm->defaultconf, "Markers", 0, 0);
1205                 
1206                 /* time space only has this keymap, the others get a boundbox restricted map */
1207                 if (sa->spacetype != SPACE_TIME) {
1208                         ARegion *ar;
1209                         static rcti rect = {0, 10000, 0, 30};    /* same local check for all areas */
1210                         ar = BKE_area_find_region_type(sa, RGN_TYPE_WINDOW);
1211                         if (ar) {
1212                                 WM_event_add_keymap_handler_bb(handlers, keymap, &rect, &ar->winrct);
1213                         }
1214                 }
1215                 else
1216                         WM_event_add_keymap_handler(handlers, keymap);
1217         }
1218         if (flag & ED_KEYMAP_ANIMATION) {
1219                 /* frame changing and timeline operators (for time spaces) */
1220                 wmKeyMap *keymap = WM_keymap_find(wm->defaultconf, "Animation", 0, 0);
1221                 WM_event_add_keymap_handler(handlers, keymap);
1222         }
1223         if (flag & ED_KEYMAP_FRAMES) {
1224                 /* frame changing/jumping (for all spaces) */
1225                 wmKeyMap *keymap = WM_keymap_find(wm->defaultconf, "Frames", 0, 0);
1226                 WM_event_add_keymap_handler(handlers, keymap);
1227         }
1228         if (flag & ED_KEYMAP_GPENCIL) {
1229                 /* grease pencil */
1230                 wmKeyMap *keymap = WM_keymap_find(wm->defaultconf, "Grease Pencil", 0, 0);
1231                 WM_event_add_keymap_handler(handlers, keymap);
1232         }
1233         if (flag & ED_KEYMAP_HEADER) {
1234                 /* standard keymap for headers regions */
1235                 wmKeyMap *keymap = WM_keymap_find(wm->defaultconf, "Header", 0, 0);
1236                 WM_event_add_keymap_handler(handlers, keymap);
1237         }
1238 }
1239
1240
1241 /* called in screen_refresh, or screens_init, also area size changes */
1242 void ED_area_initialize(wmWindowManager *wm, wmWindow *win, ScrArea *sa)
1243 {
1244         ARegion *ar;
1245         rcti rect;
1246         
1247         /* set typedefinitions */
1248         sa->type = BKE_spacetype_from_id(sa->spacetype);
1249         
1250         if (sa->type == NULL) {
1251                 sa->butspacetype = sa->spacetype = SPACE_VIEW3D;
1252                 sa->type = BKE_spacetype_from_id(sa->spacetype);
1253         }
1254         
1255         for (ar = sa->regionbase.first; ar; ar = ar->next)
1256                 ar->type = BKE_regiontype_from_id(sa->type, ar->regiontype);
1257         
1258         /* area sizes */
1259         area_calc_totrct(sa, WM_window_pixels_x(win), WM_window_pixels_y(win));
1260         
1261         /* clear all azones, add the area triange widgets */
1262         area_azone_initialize(win->screen, sa);
1263
1264         /* region rect sizes */
1265         rect = sa->totrct;
1266         region_rect_recursive(win, sa, sa->regionbase.first, &rect, 0);
1267         
1268         /* default area handlers */
1269         ed_default_handlers(wm, sa, &sa->handlers, sa->type->keymapflag);
1270         /* checks spacedata, adds own handlers */
1271         if (sa->type->init)
1272                 sa->type->init(wm, sa);
1273         
1274         /* region windows, default and own handlers */
1275         for (ar = sa->regionbase.first; ar; ar = ar->next) {
1276                 region_subwindow(win, ar);
1277                 
1278                 if (ar->swinid) {
1279                         /* default region handlers */
1280                         ed_default_handlers(wm, sa, &ar->handlers, ar->type->keymapflag);
1281                         /* own handlers */
1282                         if (ar->type->init)
1283                                 ar->type->init(wm, ar);
1284                 }
1285                 else {
1286                         /* prevent uiblocks to run */
1287                         uiFreeBlocks(NULL, &ar->uiblocks);
1288                 }
1289         }
1290 }
1291
1292 /* externally called for floating regions like menus */
1293 void ED_region_init(bContext *C, ARegion *ar)
1294 {
1295 //      ARegionType *at = ar->type;
1296         
1297         /* refresh can be called before window opened */
1298         region_subwindow(CTX_wm_window(C), ar);
1299         
1300         ar->winx = BLI_rcti_size_x(&ar->winrct) + 1;
1301         ar->winy = BLI_rcti_size_y(&ar->winrct) + 1;
1302         
1303         /* v2d mask is used to subtract scrollbars from a 2d view. Needs initialize here. */
1304         BLI_rcti_init(&ar->v2d.mask, 0, ar->winx - 1, 0, ar->winy -1);
1305
1306         /* UI convention */
1307         wmOrtho2(-0.01f, ar->winx - 0.01f, -0.01f, ar->winy - 0.01f);
1308         glLoadIdentity();
1309 }
1310
1311 /* for quick toggle, can skip fades */
1312 void region_toggle_hidden(bContext *C, ARegion *ar, int do_fade)
1313 {
1314         ScrArea *sa = CTX_wm_area(C);
1315         
1316         ar->flag ^= RGN_FLAG_HIDDEN;
1317         
1318         if (do_fade && ar->overlap) {
1319                 /* starts a timer, and in end calls the stuff below itself (region_sblend_invoke()) */
1320                 region_blend_start(C, sa, ar);
1321         }
1322         else {
1323                 if (ar->flag & RGN_FLAG_HIDDEN)
1324                         WM_event_remove_handlers(C, &ar->handlers);
1325                 
1326                 ED_area_initialize(CTX_wm_manager(C), CTX_wm_window(C), sa);
1327                 ED_area_tag_redraw(sa);
1328         }
1329 }
1330
1331 /* exported to all editors, uses fading default */
1332 void ED_region_toggle_hidden(bContext *C, ARegion *ar)
1333 {
1334         region_toggle_hidden(C, ar, 1);
1335 }
1336
1337 /* sa2 to sa1, we swap spaces for fullscreen to keep all allocated data */
1338 /* area vertices were set */
1339 void area_copy_data(ScrArea *sa1, ScrArea *sa2, int swap_space)
1340 {
1341         SpaceType *st;
1342         ARegion *ar;
1343         int spacetype = sa1->spacetype;
1344         
1345         sa1->headertype = sa2->headertype;
1346         sa1->spacetype = sa2->spacetype;
1347         sa1->butspacetype = sa2->butspacetype;
1348         
1349         if (swap_space == 1) {
1350                 SWAP(ListBase, sa1->spacedata, sa2->spacedata);
1351                 /* exception: ensure preview is reset */
1352 //              if (sa1->spacetype == SPACE_VIEW3D)
1353 // XXX                  BIF_view3d_previewrender_free(sa1->spacedata.first);
1354         }
1355         else if (swap_space == 2) {
1356                 BKE_spacedata_copylist(&sa1->spacedata, &sa2->spacedata);
1357         }
1358         else {
1359                 BKE_spacedata_freelist(&sa1->spacedata);
1360                 BKE_spacedata_copylist(&sa1->spacedata, &sa2->spacedata);
1361         }
1362         
1363         /* Note; SPACE_EMPTY is possible on new screens */
1364         
1365         /* regions */
1366         if (swap_space == 1) {
1367                 SWAP(ListBase, sa1->regionbase, sa2->regionbase);
1368         }
1369         else {
1370                 if (swap_space < 2) {
1371                         st = BKE_spacetype_from_id(spacetype);
1372                         for (ar = sa1->regionbase.first; ar; ar = ar->next)
1373                                 BKE_area_region_free(st, ar);
1374                         BLI_freelistN(&sa1->regionbase);
1375                 }
1376                 
1377                 st = BKE_spacetype_from_id(sa2->spacetype);
1378                 for (ar = sa2->regionbase.first; ar; ar = ar->next) {
1379                         ARegion *newar = BKE_area_region_copy(st, ar);
1380                         BLI_addtail(&sa1->regionbase, newar);
1381                 }
1382         }
1383 }
1384
1385 /* *********** Space switching code *********** */
1386
1387 void ED_area_swapspace(bContext *C, ScrArea *sa1, ScrArea *sa2)
1388 {
1389         ScrArea *tmp = MEM_callocN(sizeof(ScrArea), "addscrarea");
1390
1391         ED_area_exit(C, sa1);
1392         ED_area_exit(C, sa2);
1393
1394         area_copy_data(tmp, sa1, 2);
1395         area_copy_data(sa1, sa2, 0);
1396         area_copy_data(sa2, tmp, 0);
1397         ED_area_initialize(CTX_wm_manager(C), CTX_wm_window(C), sa1);
1398         ED_area_initialize(CTX_wm_manager(C), CTX_wm_window(C), sa2);
1399
1400         BKE_screen_area_free(tmp);
1401         MEM_freeN(tmp);
1402
1403         /* tell WM to refresh, cursor types etc */
1404         WM_event_add_mousemove(C);
1405         
1406         ED_area_tag_redraw(sa1);
1407         ED_area_tag_refresh(sa1);
1408         ED_area_tag_redraw(sa2);
1409         ED_area_tag_refresh(sa2);
1410 }
1411
1412 void ED_area_newspace(bContext *C, ScrArea *sa, int type)
1413 {
1414         if (sa->spacetype != type) {
1415                 SpaceType *st;
1416                 SpaceLink *slold;
1417                 SpaceLink *sl;
1418
1419                 ED_area_exit(C, sa);
1420
1421                 st = BKE_spacetype_from_id(type);
1422                 slold = sa->spacedata.first;
1423
1424                 sa->spacetype = type;
1425                 sa->butspacetype = type;
1426                 sa->type = st;
1427                 
1428                 /* check previously stored space */
1429                 for (sl = sa->spacedata.first; sl; sl = sl->next)
1430                         if (sl->spacetype == type)
1431                                 break;
1432                 
1433                 /* old spacedata... happened during work on 2.50, remove */
1434                 if (sl && sl->regionbase.first == NULL) {
1435                         st->free(sl);
1436                         BLI_freelinkN(&sa->spacedata, sl);
1437                         if (slold == sl) {
1438                                 slold = NULL;
1439                         }
1440                         sl = NULL;
1441                 }
1442                 
1443                 if (sl) {
1444                         
1445                         /* swap regions */
1446                         slold->regionbase = sa->regionbase;
1447                         sa->regionbase = sl->regionbase;
1448                         sl->regionbase.first = sl->regionbase.last = NULL;
1449                         
1450                         /* put in front of list */
1451                         BLI_remlink(&sa->spacedata, sl);
1452                         BLI_addhead(&sa->spacedata, sl);
1453                 }
1454                 else {
1455                         /* new space */
1456                         if (st) {
1457                                 sl = st->new(C);
1458                                 BLI_addhead(&sa->spacedata, sl);
1459                                 
1460                                 /* swap regions */
1461                                 if (slold)
1462                                         slold->regionbase = sa->regionbase;
1463                                 sa->regionbase = sl->regionbase;
1464                                 sl->regionbase.first = sl->regionbase.last = NULL;
1465                         }
1466                 }
1467                 
1468                 ED_area_initialize(CTX_wm_manager(C), CTX_wm_window(C), sa);
1469                 
1470                 /* tell WM to refresh, cursor types etc */
1471                 WM_event_add_mousemove(C);
1472                                 
1473                 /* send space change notifier */
1474                 WM_event_add_notifier(C, NC_SPACE | ND_SPACE_CHANGED, sa);
1475                 
1476                 ED_area_tag_refresh(sa);
1477         }
1478         
1479         /* also redraw when re-used */
1480         ED_area_tag_redraw(sa);
1481 }
1482
1483 void ED_area_prevspace(bContext *C, ScrArea *sa)
1484 {
1485         SpaceLink *sl = (sa) ? sa->spacedata.first : CTX_wm_space_data(C);
1486
1487         if (sl && sl->next) {
1488                 /* workaround for case of double prevspace, render window
1489                  * with a file browser on top of it */
1490                 if (sl->next->spacetype == SPACE_FILE && sl->next->next)
1491                         ED_area_newspace(C, sa, sl->next->next->spacetype);
1492                 else
1493                         ED_area_newspace(C, sa, sl->next->spacetype);
1494         }
1495         else {
1496                 /* no change */
1497                 return;
1498         }
1499         ED_area_tag_redraw(sa);
1500
1501         /* send space change notifier */
1502         WM_event_add_notifier(C, NC_SPACE | ND_SPACE_CHANGED, sa);
1503 }
1504
1505 static const char *editortype_pup(void)
1506 {
1507         const char *types = N_(
1508             "Editor type: %t"
1509             "|3D View %x1"
1510
1511             "|%l"
1512
1513             "|Timeline %x15"
1514             "|Graph Editor %x2"
1515             "|DopeSheet %x12"
1516             "|NLA Editor %x13"
1517
1518             "|%l"
1519
1520             "|UV/Image Editor %x6"
1521
1522             "|Video Sequence Editor %x8"
1523             "|Movie Clip Editor %x20"
1524             "|Text Editor %x9"
1525             "|Node Editor %x16"
1526             "|Logic Editor %x17"
1527
1528             "|%l"
1529
1530             "|Properties %x4"
1531             "|Outliner %x3"
1532             "|User Preferences %x19"
1533             "|Info %x7"
1534
1535             "|%l"
1536
1537             "|File Browser %x5"
1538
1539             "|%l"
1540
1541             "|Python Console %x18"
1542             );
1543
1544         return IFACE_(types);
1545 }
1546
1547 static void spacefunc(struct bContext *C, void *UNUSED(arg1), void *UNUSED(arg2))
1548 {
1549         ED_area_newspace(C, CTX_wm_area(C), CTX_wm_area(C)->butspacetype);
1550         ED_area_tag_redraw(CTX_wm_area(C));
1551
1552         /* send space change notifier */
1553         WM_event_add_notifier(C, NC_SPACE | ND_SPACE_CHANGED, CTX_wm_area(C));
1554 }
1555
1556 /* returns offset for next button in header */
1557 int ED_area_header_switchbutton(const bContext *C, uiBlock *block, int yco)
1558 {
1559         ScrArea *sa = CTX_wm_area(C);
1560         uiBut *but;
1561         int xco = 0.4 * U.widget_unit;
1562         
1563         but = uiDefIconTextButC(block, ICONTEXTROW, 0, ICON_VIEW3D, 
1564                                 editortype_pup(), xco, yco, 1.5 * U.widget_unit, U.widget_unit,
1565                                 &(sa->butspacetype), 1.0, SPACEICONMAX, 0, 0,
1566                                 TIP_("Display current editor type (click for a menu of available types)"));
1567         uiButSetFunc(but, spacefunc, NULL, NULL);
1568         uiButClearFlag(but, UI_BUT_UNDO); /* skip undo on screen buttons */
1569         
1570         return xco + 1.7 * U.widget_unit;
1571 }
1572
1573 int ED_area_header_standardbuttons(const bContext *C, uiBlock *block, int yco)
1574 {
1575         ScrArea *sa = CTX_wm_area(C);
1576         int xco = 0.4 * U.widget_unit;
1577         uiBut *but;
1578         
1579         if (!sa->full)
1580                 xco = ED_area_header_switchbutton(C, block, yco);
1581
1582         uiBlockSetEmboss(block, UI_EMBOSSN);
1583
1584         if (sa->flag & HEADER_NO_PULLDOWN) {
1585                 but = uiDefIconButBitS(block, TOG, HEADER_NO_PULLDOWN, 0,
1586                                        ICON_DISCLOSURE_TRI_RIGHT,
1587                                        xco, yco, U.widget_unit, U.widget_unit * 0.9f,
1588                                        &(sa->flag), 0, 0, 0, 0,
1589                                        "Show pulldown menus");
1590         }
1591         else {
1592                 but = uiDefIconButBitS(block, TOG, HEADER_NO_PULLDOWN, 0,
1593                                        ICON_DISCLOSURE_TRI_DOWN,
1594                                        xco, yco, U.widget_unit, U.widget_unit * 0.9f,
1595                                        &(sa->flag), 0, 0, 0, 0,
1596                                        "Hide pulldown menus");
1597         }
1598
1599         uiButClearFlag(but, UI_BUT_UNDO); /* skip undo on screen buttons */
1600
1601         uiBlockSetEmboss(block, UI_EMBOSS);
1602         
1603         return xco + U.widget_unit;
1604 }
1605
1606 /************************ standard UI regions ************************/
1607
1608 void ED_region_panels(const bContext *C, ARegion *ar, int vertical, const char *context, int contextnr)
1609 {
1610         ScrArea *sa = CTX_wm_area(C);
1611         uiStyle *style = UI_GetStyleDraw();
1612         uiBlock *block;
1613         PanelType *pt;
1614         Panel *panel;
1615         View2D *v2d = &ar->v2d;
1616         View2DScrollers *scrollers;
1617         int x, y, xco, yco, w, em, triangle, open, newcontext = 0;
1618         int redo;
1619         int scroll;
1620
1621         if (contextnr >= 0)
1622                 newcontext = UI_view2d_tab_set(v2d, contextnr);
1623         
1624         /* before setting the view */
1625         if (vertical) {
1626                 /* only allow scrolling in vertical direction */
1627                 v2d->keepofs |= V2D_LOCKOFS_X | V2D_KEEPOFS_Y;
1628                 v2d->keepofs &= ~(V2D_LOCKOFS_Y | V2D_KEEPOFS_X);
1629                 v2d->scroll &= ~(V2D_SCROLL_BOTTOM);
1630                 v2d->scroll |= (V2D_SCROLL_RIGHT);
1631         }
1632         else {
1633                 /* for now, allow scrolling in both directions (since layouts are optimized for vertical,
1634                  * they often don't fit in horizontal layout)
1635                  */
1636                 v2d->keepofs &= ~(V2D_LOCKOFS_X | V2D_LOCKOFS_Y | V2D_KEEPOFS_X | V2D_KEEPOFS_Y);
1637                 v2d->scroll |= (V2D_SCROLL_BOTTOM);
1638                 v2d->scroll &= ~(V2D_SCROLL_RIGHT);
1639         }
1640
1641         scroll = v2d->scroll;
1642         
1643         /* sortof hack - but we cannot predict the height of panels, until it's being generated */
1644         /* the layout engine works with fixed width (from v2d->cur), which is being set at end of the loop */
1645         /* in case scroller settings (hide flags) differ from previous, the whole loop gets done again */
1646         for (redo = 2; redo > 0; redo--) {
1647                 
1648                 if (vertical) {
1649                         w = BLI_rctf_size_x(&v2d->cur);
1650                         em = (ar->type->prefsizex) ? UI_UNIT_Y / 2 : UI_UNIT_Y;
1651                 }
1652                 else {
1653                         w = UI_PANEL_WIDTH;
1654                         em = (ar->type->prefsizex) ? UI_UNIT_Y / 2 : UI_UNIT_Y;
1655                 }
1656                 
1657                 /* create panels */
1658                 uiBeginPanels(C, ar);
1659
1660                 /* set view2d view matrix  - uiBeginBlock() stores it */
1661                 UI_view2d_view_ortho(v2d);
1662
1663                 for (pt = ar->type->paneltypes.first; pt; pt = pt->next) {
1664                         /* verify context */
1665                         if (context)
1666                                 if (pt->context[0] && strcmp(context, pt->context) != 0)
1667                                         continue;
1668
1669                         /* draw panel */
1670                         if (pt->draw && (!pt->poll || pt->poll(C, pt))) {
1671                                 block = uiBeginBlock(C, ar, pt->idname, UI_EMBOSS);
1672                                 panel = uiBeginPanel(sa, ar, block, pt, &open);
1673
1674                                 /* bad fixed values */
1675                                 triangle = (int)(UI_UNIT_Y * 1.1f);
1676
1677                                 if (pt->draw_header && !(pt->flag & PNL_NO_HEADER) && (open || vertical)) {
1678                                         /* for enabled buttons */
1679                                         panel->layout = uiBlockLayout(block, UI_LAYOUT_HORIZONTAL, UI_LAYOUT_HEADER,
1680                                                                       triangle, (UI_UNIT_Y * 1.1f) + style->panelspace, UI_UNIT_Y, 1, style);
1681
1682                                         pt->draw_header(C, panel);
1683
1684                                         uiBlockLayoutResolve(block, &xco, &yco);
1685                                         panel->labelofs = xco - triangle;
1686                                         panel->layout = NULL;
1687                                 }
1688                                 else {
1689                                         panel->labelofs = 0;
1690                                 }
1691
1692                                 if (open) {
1693                                         short panelContext;
1694                                         
1695                                         /* panel context can either be toolbar region or normal panels region */
1696                                         if (ar->regiontype == RGN_TYPE_TOOLS)
1697                                                 panelContext = UI_LAYOUT_TOOLBAR;
1698                                         else
1699                                                 panelContext = UI_LAYOUT_PANEL;
1700                                         
1701                                         panel->layout = uiBlockLayout(block, UI_LAYOUT_VERTICAL, panelContext,
1702                                                                       style->panelspace, 0, w - 2 * style->panelspace, em, style);
1703
1704                                         pt->draw(C, panel);
1705
1706                                         uiBlockLayoutResolve(block, &xco, &yco);
1707                                         panel->layout = NULL;
1708
1709                                         yco -= 2 * style->panelspace;
1710                                         uiEndPanel(block, w, -yco);
1711                                 }
1712                                 else {
1713                                         yco = 0;
1714                                         uiEndPanel(block, w, 0);
1715                                 }
1716
1717                                 uiEndBlock(C, block);
1718                         }
1719                 }
1720
1721                 /* align panels and return size */
1722                 uiEndPanels(C, ar, &x, &y);
1723                 
1724                 /* before setting the view */
1725                 if (vertical) {
1726                         /* we always keep the scroll offset - so the total view gets increased with the scrolled away part */
1727                         if (v2d->cur.ymax < - 0.001f)
1728                                 y = min_ii(y, v2d->cur.ymin);
1729                         
1730                         y = -y;
1731                 }
1732                 else {
1733                         /* don't jump back when panels close or hide */
1734                         if (!newcontext)
1735                                 x = max_ii(x, v2d->cur.xmax);
1736                         y = -y;
1737                 }
1738                 
1739                 /* this also changes the 'cur' */
1740                 UI_view2d_totRect_set(v2d, x, y);
1741                 
1742                 if (scroll != v2d->scroll) {
1743                         /* Note: this code scales fine, but because of rounding differences, positions of elements
1744                          * flip +1 or -1 pixel compared to redoing the entire layout again.
1745                          * Leaving in commented code for future tests */
1746                         /* uiScalePanels(ar, BLI_rctf_size_x(&v2d->cur));
1747                            break; */
1748                 }
1749                 else break;
1750         }
1751         
1752         
1753         /* clear */
1754         if (ar->overlap) {
1755                 /* view should be in pixelspace */
1756                 UI_view2d_view_restore(C);
1757                 glEnable(GL_BLEND);
1758                 UI_ThemeColor4((ar->type->regionid == RGN_TYPE_PREVIEW) ? TH_PREVIEW_BACK : TH_BACK);
1759                 glRecti(0, 0, BLI_rcti_size_x(&ar->winrct), BLI_rcti_size_y(&ar->winrct));
1760                 glDisable(GL_BLEND);
1761         }
1762         else {
1763                 UI_ThemeClearColor((ar->type->regionid == RGN_TYPE_PREVIEW) ? TH_PREVIEW_BACK : TH_BACK);
1764                 glClear(GL_COLOR_BUFFER_BIT);
1765         }
1766         
1767
1768         /* set the view */
1769         UI_view2d_view_ortho(v2d);
1770
1771         /* draw panels */
1772         uiDrawPanels(C, ar);
1773
1774         /* restore view matrix */
1775         UI_view2d_view_restore(C);
1776         
1777         /* scrollers */
1778         scrollers = UI_view2d_scrollers_calc(C, v2d, V2D_ARG_DUMMY, V2D_ARG_DUMMY, V2D_ARG_DUMMY, V2D_ARG_DUMMY);
1779         UI_view2d_scrollers_draw(C, v2d, scrollers);
1780         UI_view2d_scrollers_free(scrollers);
1781 }
1782
1783 void ED_region_panels_init(wmWindowManager *wm, ARegion *ar)
1784 {
1785         wmKeyMap *keymap;
1786
1787         UI_view2d_region_reinit(&ar->v2d, V2D_COMMONVIEW_PANELS_UI, ar->winx, ar->winy);
1788
1789         keymap = WM_keymap_find(wm->defaultconf, "View2D Buttons List", 0, 0);
1790         WM_event_add_keymap_handler(&ar->handlers, keymap);
1791 }
1792
1793 void ED_region_header(const bContext *C, ARegion *ar)
1794 {
1795         uiStyle *style = UI_GetStyleDraw();
1796         uiBlock *block;
1797         uiLayout *layout;
1798         HeaderType *ht;
1799         Header header = {NULL};
1800         int maxco, xco, yco;
1801         int headery = ED_area_headersize();
1802
1803         /* clear */
1804         UI_ThemeClearColor((ED_screen_area_active(C)) ? TH_HEADER : TH_HEADERDESEL);
1805         glClear(GL_COLOR_BUFFER_BIT);
1806         
1807         /* set view2d view matrix for scrolling (without scrollers) */
1808         UI_view2d_view_ortho(&ar->v2d);
1809
1810         xco = maxco = 0.4f * UI_UNIT_X;
1811         yco = headery - floor(0.2f * UI_UNIT_Y);
1812
1813         /* draw all headers types */
1814         for (ht = ar->type->headertypes.first; ht; ht = ht->next) {
1815                 block = uiBeginBlock(C, ar, ht->idname, UI_EMBOSS);
1816                 layout = uiBlockLayout(block, UI_LAYOUT_HORIZONTAL, UI_LAYOUT_HEADER, xco, yco, UI_UNIT_Y, 1, style);
1817
1818                 if (ht->draw) {
1819                         header.type = ht;
1820                         header.layout = layout;
1821                         ht->draw(C, &header);
1822                         
1823                         /* for view2d */
1824                         xco = uiLayoutGetWidth(layout);
1825                         if (xco > maxco)
1826                                 maxco = xco;
1827                 }
1828
1829                 uiBlockLayoutResolve(block, &xco, &yco);
1830                 
1831                 /* for view2d */
1832                 if (xco > maxco)
1833                         maxco = xco;
1834                 
1835                 uiEndBlock(C, block);
1836                 uiDrawBlock(C, block);
1837         }
1838
1839         /* always as last  */
1840         UI_view2d_totRect_set(&ar->v2d, maxco + UI_UNIT_X + 80, headery);
1841
1842         /* restore view matrix? */
1843         UI_view2d_view_restore(C);
1844 }
1845
1846 void ED_region_header_init(ARegion *ar)
1847 {
1848         ar->v2d.flag &= ~V2D_IS_INITIALISED;
1849         UI_view2d_region_reinit(&ar->v2d, V2D_COMMONVIEW_HEADER, ar->winx, ar->winy);
1850 }
1851
1852 /* UI_UNIT_Y is defined as U variable now, depending dpi */
1853 int ED_area_headersize(void)
1854 {
1855         return (int)(1.3f * UI_UNIT_Y);
1856 }
1857
1858 void ED_region_info_draw(ARegion *ar, const char *text, int block, float alpha)
1859 {
1860         const int header_height = UI_UNIT_Y;
1861         uiStyle *style = UI_GetStyleDraw();
1862         int fontid = style->widget.uifont_id;
1863         rcti rect;
1864
1865         /* background box */
1866         ED_region_visible_rect(ar, &rect);
1867         rect.xmin = 0;
1868         rect.ymin = BLI_rcti_size_y(&ar->winrct) - header_height;
1869
1870         if (block) {
1871                 rect.xmax = BLI_rcti_size_x(&ar->winrct);
1872         }
1873         else {
1874                 rect.xmax = rect.xmin + BLF_width(fontid, text) + 24;
1875         }
1876
1877         rect.ymax = BLI_rcti_size_y(&ar->winrct);
1878
1879         glEnable(GL_BLEND);
1880         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1881         glColor4f(0.0f, 0.0f, 0.0f, alpha);
1882         glRecti(rect.xmin, rect.ymin, rect.xmax + 1, rect.ymax + 1);
1883         glDisable(GL_BLEND);
1884
1885         /* text */
1886         UI_ThemeColor(TH_TEXT_HI);
1887         BLF_position(fontid, 12, rect.ymin + 5, 0.0f);
1888         BLF_draw(fontid, text, BLF_DRAW_STR_DUMMY_MAX);
1889 }
1890
1891 void ED_region_grid_draw(ARegion *ar, float zoomx, float zoomy)
1892 {
1893         float gridsize, gridstep = 1.0f / 32.0f;
1894         float fac, blendfac;
1895         int x1, y1, x2, y2;
1896
1897         /* the image is located inside (0, 0), (1, 1) as set by view2d */
1898         UI_ThemeColorShade(TH_BACK, 20);
1899
1900         UI_view2d_to_region_no_clip(&ar->v2d, 0.0f, 0.0f, &x1, &y1);
1901         UI_view2d_to_region_no_clip(&ar->v2d, 1.0f, 1.0f, &x2, &y2);
1902         glRectf(x1, y1, x2, y2);
1903
1904         /* gridsize adapted to zoom level */
1905         gridsize = 0.5f * (zoomx + zoomy);
1906         if (gridsize <= 0.0f)
1907                 return;
1908
1909         if (gridsize < 1.0f) {
1910                 while (gridsize < 1.0f) {
1911                         gridsize *= 4.0f;
1912                         gridstep *= 4.0f;
1913                 }
1914         }
1915         else {
1916                 while (gridsize >= 4.0f) {
1917                         gridsize /= 4.0f;
1918                         gridstep /= 4.0f;
1919                 }
1920         }
1921
1922         /* the fine resolution level */
1923         blendfac = 0.25f * gridsize - floorf(0.25f * gridsize);
1924         CLAMP(blendfac, 0.0f, 1.0f);
1925         UI_ThemeColorShade(TH_BACK, (int)(20.0f * (1.0f - blendfac)));
1926
1927         fac = 0.0f;
1928         glBegin(GL_LINES);
1929         while (fac < 1.0f) {
1930                 glVertex2f(x1, y1 * (1.0f - fac) + y2 * fac);
1931                 glVertex2f(x2, y1 * (1.0f - fac) + y2 * fac);
1932                 glVertex2f(x1 * (1.0f - fac) + x2 * fac, y1);
1933                 glVertex2f(x1 * (1.0f - fac) + x2 * fac, y2);
1934                 fac += gridstep;
1935         }
1936
1937         /* the large resolution level */
1938         UI_ThemeColor(TH_BACK);
1939
1940         fac = 0.0f;
1941         while (fac < 1.0f) {
1942                 glVertex2f(x1, y1 * (1.0f - fac) + y2 * fac);
1943                 glVertex2f(x2, y1 * (1.0f - fac) + y2 * fac);
1944                 glVertex2f(x1 * (1.0f - fac) + x2 * fac, y1);
1945                 glVertex2f(x1 * (1.0f - fac) + x2 * fac, y2);
1946                 fac += 4.0f * gridstep;
1947         }
1948         glEnd();
1949 }
1950
1951 /* If the area has overlapping regions, it returns visible rect for Region *ar */
1952 /* rect gets returned in local region coordinates */
1953 void ED_region_visible_rect(ARegion *ar, rcti *rect)
1954 {
1955         ARegion *arn = ar;
1956         
1957         /* allow function to be called without area */
1958         while (arn->prev)
1959                 arn = arn->prev;
1960         
1961         *rect = ar->winrct;
1962         
1963         /* check if a region overlaps with the current one */
1964         for (; arn; arn = arn->next) {
1965                 if (ar != arn && arn->overlap) {
1966                         if (BLI_rcti_isect(rect, &arn->winrct, NULL)) {
1967                                 /* overlap left */
1968                                 if (rect->xmin == arn->winrct.xmin)
1969                                         rect->xmin = arn->winrct.xmax;
1970                                 /* overlap right */
1971                                 if (rect->xmax == arn->winrct.xmax)
1972                                         rect->xmax = arn->winrct.xmin;
1973                         }
1974                 }
1975         }
1976         BLI_rcti_translate(rect, -ar->winrct.xmin, -ar->winrct.ymin);
1977 }
1978