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_global.h"
  41 #include "BKE_utildefines.h"
  42
  43 #include "WM_api.h"
  44 #include "WM_types.h"
  45
  46 #include "wm_event_system.h"
  47 #include "wm_subwindow.h"
  48
  49 #include "BIF_gl.h"
  50 #include "BIF_glutil.h"
  51
  52
  53 /* context checked on having screen, window and area */
  54 wmGesture *WM_gesture_new(bContext *C, wmEvent *event, int type)
  55 {
  56         wmGesture *gesture= MEM_callocN(sizeof(wmGesture), "new gesture");
  57         int sx, sy;
  58
  59         BLI_addtail(&C->window->gesture, gesture);
  60
  61         gesture->type= type;
  62         gesture->event_type= event->type;
  63         gesture->swinid= C->screen->subwinactive;       /* means only in area-region context! */
  64
  65         wm_subwindow_getorigin(C->window, gesture->swinid, &sx, &sy);
  66
  67         if( ELEM3(type, WM_GESTURE_RECT, WM_GESTURE_CROSS_RECT, WM_GESTURE_TWEAK)) {
  68                 rcti *rect= MEM_callocN(sizeof(rcti), "gesture rect new");
  69
  70                 gesture->customdata= rect;
  71                 rect->xmin= event->x - sx;
  72                 rect->ymin= event->y - sy;
  73                 rect->xmax= event->x - sx;
  74                 rect->ymax= event->y - sy;
  75         }
  76
  77         return gesture;
  78 }
  79
  80 void WM_gesture_end(bContext *C, wmGesture *gesture)
  81 {
  82         BLI_remlink(&C->window->gesture, gesture);
  83         MEM_freeN(gesture->customdata);
  84         MEM_freeN(gesture);
  85 }
  86
  87 /* for line, lasso, ... */
  88 void wm_gesture_point_add(bContext *C, wmGesture *gesture)
  89 {
  90
  91 }
  92
  93 /* tweak and line gestures */
  94 #define TWEAK_THRESHOLD         10
  95 int wm_gesture_evaluate(bContext *C, wmGesture *gesture)
  96 {
  97         if(gesture->type==WM_GESTURE_TWEAK) {
  98                 rcti *rect= gesture->customdata;
  99                 int dx= rect->xmax - rect->xmin;
 100                 int dy= rect->ymax - rect->ymin;
 101                 if(ABS(dx)+ABS(dy) > TWEAK_THRESHOLD) {
 102                         int theta= (int)floor(4.0f*atan2((float)dy, (float)dx)/M_PI + 0.5);
 103                         int val= EVT_GESTURE_W;
 104
 105                         if(theta==0) val= EVT_GESTURE_E;
 106                         else if(theta==1) val= EVT_GESTURE_NE;
 107                         else if(theta==2) val= EVT_GESTURE_N;
 108                         else if(theta==3) val= EVT_GESTURE_NW;
 109                         else if(theta==-1) val= EVT_GESTURE_SE;
 110                         else if(theta==-2) val= EVT_GESTURE_S;
 111                         else if(theta==-3) val= EVT_GESTURE_SW;
 112
 113 #if 0
 114                         /* debug */
 115                         if(val==1) printf("tweak north\n");
 116                         if(val==2) printf("tweak north-east\n");
 117                         if(val==3) printf("tweak east\n");
 118                         if(val==4) printf("tweak south-east\n");
 119                         if(val==5) printf("tweak south\n");
 120                         if(val==6) printf("tweak south-west\n");
 121                         if(val==7) printf("tweak west\n");
 122                         if(val==8) printf("tweak north-west\n");
 123 #endif
 124                         return val;
 125                 }
 126         }
 127         return 0;
 128 }
 129
 130
 131 /* ******************* gesture draw ******************* */
 132
 133 static void wm_gesture_draw_rect(wmWindow *win, wmGesture *gt)
 134 {
 135         rcti *rect= (rcti *)gt->customdata;
 136
 137         glEnable(GL_LINE_STIPPLE);
 138         glColor3ub(0, 0, 0);
 139         glLineStipple(1, 0xCCCC);
 140         sdrawbox(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
 141         glColor3ub(255, 255, 255);
 142         glLineStipple(1, 0x3333);
 143         sdrawbox(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
 144         glDisable(GL_LINE_STIPPLE);
 145 }
 146
 147 static void wm_gesture_draw_line(wmWindow *win, wmGesture *gt)
 148 {
 149         rcti *rect= (rcti *)gt->customdata;
 150
 151         glEnable(GL_LINE_STIPPLE);
 152         glColor3ub(0, 0, 0);
 153         glLineStipple(1, 0xAAAA);
 154         sdrawline(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
 155         glColor3ub(255, 255, 255);
 156         glLineStipple(1, 0x5555);
 157         sdrawline(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
 158
 159         glDisable(GL_LINE_STIPPLE);
 160
 161 }
 162
 163 static void wm_gesture_draw_cross(wmWindow *win, wmGesture *gt)
 164 {
 165         rcti *rect= (rcti *)gt->customdata;
 166
 167         glEnable(GL_LINE_STIPPLE);
 168         glColor3ub(0, 0, 0);
 169         glLineStipple(1, 0xCCCC);
 170         sdrawline(rect->xmin - win->sizex, rect->ymin, rect->xmin + win->sizex, rect->ymin);
 171         sdrawline(rect->xmin, rect->ymin - win->sizey, rect->xmin, rect->ymin + win->sizey);
 172
 173         glColor3ub(255, 255, 255);
 174         glLineStipple(1, 0x3333);
 175         sdrawline(rect->xmin - win->sizex, rect->ymin, rect->xmin + win->sizex, rect->ymin);
 176         sdrawline(rect->xmin, rect->ymin - win->sizey, rect->xmin, rect->ymin + win->sizey);
 177         glDisable(GL_LINE_STIPPLE);
 178 }
 179
 180 /* called in wm_event_system.c */
 181 void wm_gesture_draw(wmWindow *win)
 182 {
 183         wmGesture *gt= (wmGesture *)win->gesture.first;
 184
 185         for(; gt; gt= gt->next) {
 186                 /* all in subwindow space */
 187                 wm_subwindow_set(win, gt->swinid);
 188
 189                 if(gt->type==WM_GESTURE_RECT)
 190                         wm_gesture_draw_rect(win, gt);
 191                 else if(gt->type==WM_GESTURE_TWEAK)
 192                         wm_gesture_draw_line(win, gt);
 193                 else if(gt->type==WM_GESTURE_CROSS_RECT) {
 194                         if(gt->mode==1)
 195                                 wm_gesture_draw_rect(win, gt);
 196                         else
 197                                 wm_gesture_draw_cross(win, gt);
 198                 }
 199         }
 200 }
 201
 202