source/blender/windowmanager/intern/wm_gesture.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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19  *
  20  * The Original Code is Copyright (C) 2008 Blender Foundation.
  21  * All rights reserved.
  22  *
  23  *
  24  * Contributor(s): Blender Foundation
  25  *
  26  * ***** END GPL LICENSE BLOCK *****
  27  */
  28
  29 #define _USE_MATH_DEFINES
  30 #include <math.h>
  31
  32 #include "DNA_screen_types.h"
  33 #include "DNA_vec_types.h"
  34 #include "DNA_windowmanager_types.h"
  35
  36 #include "MEM_guardedalloc.h"
  37
  38 #include "BLI_blenlib.h"
  39
  40 #include "BKE_context.h"
  41 #include "BKE_utildefines.h"
  42
  43 #include "WM_api.h"
  44 #include "WM_types.h"
  45
  46 #include "wm.h"
  47 #include "wm_event_system.h"
  48 #include "wm_subwindow.h"
  49
  50 #include "ED_screen.h"
  51
  52 #include "BIF_gl.h"
  53 #include "BIF_glutil.h"
  54
  55
  56 /* context checked on having screen, window and area */
  57 wmGesture *WM_gesture_new(bContext *C, wmEvent *event, int type)
  58 {
  59         wmGesture *gesture= MEM_callocN(sizeof(wmGesture), "new gesture");
  60         wmWindow *window= CTX_wm_window(C);
  61         bScreen *screen= CTX_wm_screen(C);
  62         int sx, sy;
  63
  64         BLI_addtail(&window->gesture, gesture);
  65
  66         gesture->type= type;
  67         gesture->event_type= event->type;
  68         gesture->swinid= screen->subwinactive;  /* means only in area-region context! */
  69
  70         wm_subwindow_getorigin(window, gesture->swinid, &sx, &sy);
  71
  72         if( ELEM4(type, WM_GESTURE_RECT, WM_GESTURE_CROSS_RECT, WM_GESTURE_TWEAK, WM_GESTURE_CIRCLE)) {
  73                 rcti *rect= MEM_callocN(sizeof(rcti), "gesture rect new");
  74
  75                 gesture->customdata= rect;
  76                 rect->xmin= event->x - sx;
  77                 rect->ymin= event->y - sy;
  78                 if(type==WM_GESTURE_CIRCLE)
  79                         rect->xmax= 25; // XXX temp
  80                 else {
  81                         rect->xmax= event->x - sx;
  82                         rect->ymax= event->y - sy;
  83                 }
  84         }
  85         else if (type==WM_GESTURE_LASSO) {
  86                 short *lasso;
  87                 gesture->customdata= lasso= MEM_callocN(2*sizeof(short)*WM_LASSO_MAX_POINTS, "lasso points");
  88                 lasso[0] = event->x - sx;
  89                 lasso[1] = event->y - sy;
  90                 gesture->points= 1;
  91         }
  92
  93         return gesture;
  94 }
  95
  96 void WM_gesture_end(bContext *C, wmGesture *gesture)
  97 {
  98         BLI_remlink(&CTX_wm_window(C)->gesture, gesture);
  99         MEM_freeN(gesture->customdata);
 100         MEM_freeN(gesture);
 101 }
 102
 103 /* tweak and line gestures */
 104 #define TWEAK_THRESHOLD         10
 105 int wm_gesture_evaluate(bContext *C, wmGesture *gesture)
 106 {
 107         if(gesture->type==WM_GESTURE_TWEAK) {
 108                 rcti *rect= gesture->customdata;
 109                 int dx= rect->xmax - rect->xmin;
 110                 int dy= rect->ymax - rect->ymin;
 111                 if(ABS(dx)+ABS(dy) > TWEAK_THRESHOLD) {
 112                         int theta= (int)floor(4.0f*atan2((float)dy, (float)dx)/M_PI + 0.5);
 113                         int val= EVT_GESTURE_W;
 114
 115                         if(theta==0) val= EVT_GESTURE_E;
 116                         else if(theta==1) val= EVT_GESTURE_NE;
 117                         else if(theta==2) val= EVT_GESTURE_N;
 118                         else if(theta==3) val= EVT_GESTURE_NW;
 119                         else if(theta==-1) val= EVT_GESTURE_SE;
 120                         else if(theta==-2) val= EVT_GESTURE_S;
 121                         else if(theta==-3) val= EVT_GESTURE_SW;
 122
 123 #if 0
 124                         /* debug */
 125                         if(val==1) printf("tweak north\n");
 126                         if(val==2) printf("tweak north-east\n");
 127                         if(val==3) printf("tweak east\n");
 128                         if(val==4) printf("tweak south-east\n");
 129                         if(val==5) printf("tweak south\n");
 130                         if(val==6) printf("tweak south-west\n");
 131                         if(val==7) printf("tweak west\n");
 132                         if(val==8) printf("tweak north-west\n");
 133 #endif
 134                         return val;
 135                 }
 136         }
 137         return 0;
 138 }
 139
 140
 141 /* ******************* gesture draw ******************* */
 142
 143 static void wm_gesture_draw_rect(wmWindow *win, wmGesture *gt)
 144 {
 145         rcti *rect= (rcti *)gt->customdata;
 146
 147         glEnable(GL_LINE_STIPPLE);
 148         glColor3ub(0, 0, 0);
 149         glLineStipple(1, 0xCCCC);
 150         sdrawbox(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
 151         glColor3ub(255, 255, 255);
 152         glLineStipple(1, 0x3333);
 153         sdrawbox(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
 154         glDisable(GL_LINE_STIPPLE);
 155 }
 156
 157 static void wm_gesture_draw_line(wmWindow *win, wmGesture *gt)
 158 {
 159         rcti *rect= (rcti *)gt->customdata;
 160
 161         glEnable(GL_LINE_STIPPLE);
 162         glColor3ub(0, 0, 0);
 163         glLineStipple(1, 0xAAAA);
 164         sdrawline(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
 165         glColor3ub(255, 255, 255);
 166         glLineStipple(1, 0x5555);
 167         sdrawline(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
 168
 169         glDisable(GL_LINE_STIPPLE);
 170
 171 }
 172
 173 static void wm_gesture_draw_circle(wmWindow *win, wmGesture *gt)
 174 {
 175         rcti *rect= (rcti *)gt->customdata;
 176
 177         glTranslatef((float)rect->xmin, (float)rect->ymin, 0.0f);
 178
 179         glEnable(GL_LINE_STIPPLE);
 180         glColor3ub(0, 0, 0);
 181         glLineStipple(1, 0xAAAA);
 182         glutil_draw_lined_arc(0.0, M_PI*2.0, rect->xmax, 40);
 183         glColor3ub(255, 255, 255);
 184         glLineStipple(1, 0x5555);
 185         glutil_draw_lined_arc(0.0, M_PI*2.0, rect->xmax, 40);
 186
 187         glDisable(GL_LINE_STIPPLE);
 188         glTranslatef((float)-rect->xmin, (float)-rect->ymin, 0.0f);
 189
 190 }
 191
 192 static void wm_gesture_draw_lasso(wmWindow *win, wmGesture *gt)
 193 {
 194         short *lasso= (short *)gt->customdata;
 195         int i;
 196
 197         glEnable(GL_LINE_STIPPLE);
 198         glColor3ub(0, 0, 0);
 199         glLineStipple(1, 0xAAAA);
 200         glBegin(GL_LINE_STRIP);
 201         for(i=0; i<gt->points; i++, lasso+=2)
 202                 glVertex2sv(lasso);
 203         glEnd();
 204
 205         glColor3ub(255, 255, 255);
 206         glLineStipple(1, 0x5555);
 207         glBegin(GL_LINE_STRIP);
 208         lasso= (short *)gt->customdata;
 209         for(i=0; i<gt->points; i++, lasso+=2)
 210                 glVertex2sv(lasso);
 211         glEnd();
 212
 213         glDisable(GL_LINE_STIPPLE);
 214
 215 }
 216
 217 static void wm_gesture_draw_cross(wmWindow *win, wmGesture *gt)
 218 {
 219         rcti *rect= (rcti *)gt->customdata;
 220
 221         glEnable(GL_LINE_STIPPLE);
 222         glColor3ub(0, 0, 0);
 223         glLineStipple(1, 0xCCCC);
 224         sdrawline(rect->xmin - win->sizex, rect->ymin, rect->xmin + win->sizex, rect->ymin);
 225         sdrawline(rect->xmin, rect->ymin - win->sizey, rect->xmin, rect->ymin + win->sizey);
 226
 227         glColor3ub(255, 255, 255);
 228         glLineStipple(1, 0x3333);
 229         sdrawline(rect->xmin - win->sizex, rect->ymin, rect->xmin + win->sizex, rect->ymin);
 230         sdrawline(rect->xmin, rect->ymin - win->sizey, rect->xmin, rect->ymin + win->sizey);
 231         glDisable(GL_LINE_STIPPLE);
 232 }
 233
 234 /* called in wm_event_system.c */
 235 void wm_gesture_draw(wmWindow *win)
 236 {
 237         wmGesture *gt= (wmGesture *)win->gesture.first;
 238
 239         for(; gt; gt= gt->next) {
 240                 /* all in subwindow space */
 241                 wmSubWindowSet(win, gt->swinid);
 242
 243                 if(gt->type==WM_GESTURE_RECT)
 244                         wm_gesture_draw_rect(win, gt);
 245                 else if(gt->type==WM_GESTURE_TWEAK)
 246                         wm_gesture_draw_line(win, gt);
 247                 else if(gt->type==WM_GESTURE_CIRCLE)
 248                         wm_gesture_draw_circle(win, gt);
 249                 else if(gt->type==WM_GESTURE_CROSS_RECT) {
 250                         if(gt->mode==1)
 251                                 wm_gesture_draw_rect(win, gt);
 252                         else
 253                                 wm_gesture_draw_cross(win, gt);
 254                 }
 255                 else if(gt->type==WM_GESTURE_LASSO)
 256                         wm_gesture_draw_lasso(win, gt);
 257         }
 258 }
 259
 260 void wm_gesture_tag_redraw(bContext *C)
 261 {
 262         bScreen *screen= CTX_wm_screen(C);
 263         ARegion *ar= CTX_wm_region(C);
 264
 265         if(screen)
 266                 screen->do_gesture= 1;
 267         if(ar)
 268                 ED_region_tag_redraw(ar);
 269 }