Multitouch.cpp

   1 #include "Multitouch.h"
   2 #include <SDL/SDL.h>
   3 #include <stdio.h>
   4
   5 #define allocate(x) ((x*)malloc(sizeof(x)))
   6
   7 void queueDrawEvent(int type, int cursor_id, int x, int y);
   8 void queueDraggingEvent(int type, int cursor_id, int x, int y);
   9
  10 void queueStartStrokeEvent(int cursor_id, int x, int y)
  11 {
  12     queueDrawEvent(SDL_NP_START_STROKE, cursor_id, x, y);
  13 }
  14
  15 void queueAppendStrokeEvent(int cursor_id, int x, int y)
  16 {
  17     queueDrawEvent(SDL_NP_APPEND_STROKE, cursor_id, x, y);
  18 }
  19
  20 void queueFinishStrokeEvent(int cursor_id, int x, int y)
  21 {
  22     queueDrawEvent(SDL_NP_FINISH_STROKE, cursor_id, x, y);
  23 }
  24
  25 void queueStartRopeEvent(int cursor_id, int x, int y)
  26 {
  27     queueDrawEvent(SDL_NP_START_ROPE, cursor_id, x, y);
  28 }
  29
  30 void queueAppendRopeEvent(int cursor_id, int x, int y)
  31 {
  32     queueDrawEvent(SDL_NP_APPEND_ROPE, cursor_id, x, y);
  33 }
  34
  35 void queueFinishRopeEvent(int cursor_id, int x, int y)
  36 {
  37     queueDrawEvent(SDL_NP_FINISH_ROPE, cursor_id, x, y);
  38 }
  39
  40 void queueDrawEvent(int type, int cursor_id, int x, int y)
  41 {
  42     DrawEvent* de = allocate(DrawEvent);
  43     de->cursor_id = cursor_id;
  44     de->x = x;
  45     de->y = y;
  46
  47     queueUserEvent(type, de, 0);
  48 }
  49
  50 void queueStartDragEvent(int cursor_id, int x, int y)
  51 {
  52     queueDraggingEvent(SDL_NP_START_DRAG, cursor_id, x, y);
  53 }
  54
  55 void queueDragEvent(int cursor_id, int x, int y)
  56 {
  57     queueDraggingEvent(SDL_NP_DRAG, cursor_id, x, y);
  58 }
  59
  60 void queueEndDragEvent(int cursor_id, int x, int y)
  61 {
  62     queueDraggingEvent(SDL_NP_END_DRAG, cursor_id, x, y);
  63 }
  64
  65 void queueDraggingEvent(int type, int cursor_id, int x, int y)
  66 {
  67     DragEvent* de = allocate(DragEvent);
  68     de->cursor_id = cursor_id;
  69     de->x = x;
  70     de->y = y;
  71
  72     queueUserEvent(type, de, 0);
  73 }
  74
  75 void queuePanEvent(int xdiff, int ydiff)
  76 {
  77     PanEvent* pe = allocate(PanEvent);
  78     pe->xdiff = xdiff;
  79     pe->ydiff = ydiff;
  80
  81     queueUserEvent(SDL_NP_PAN, pe, 0);
  82 }
  83
  84 void queueZoomEvent(int x, int y, float zoomfactor)
  85 {
  86     ZoomEvent* ze = allocate(ZoomEvent);
  87     ze->x = x;
  88     ze->y = y;
  89     ze->zoomfactor = zoomfactor;
  90
  91     queueUserEvent(SDL_NP_ZOOM, ze, 0);
  92 }
  93
  94 void queueDeleteEvent(int x, int y)
  95 {
  96     DeleteEvent* de = allocate(DeleteEvent);
  97     de->x = x;
  98     de->y = y;
  99
 100     queueUserEvent(SDL_NP_DELETE, de, 0);
 101 }
 102
 103 void queueUserEvent(int type, void *data1, void *data2)
 104 {
 105     SDL_Event event;
 106     event.type = type;
 107     event.user.data1 = data1;
 108     event.user.data2 = data2;
 109
 110     fprintf(stderr, "Posting event: %d (%p, %p)\n", type, data1, data2);
 111
 112     if (SDL_PushEvent(&event) != 0)
 113     {
 114         fprintf(stderr, "could not push SDL event onto queue");
 115     }
 116 }