Pileus Git - ~andy/gtk/blob - gdk/x11/gdkdnd-x11.c

   1 #include <X11/Xlib.h>
   2 #include <X11/Xatom.h>
   3 #include <string.h>
   4 #include "gdkx.h"
   5 #include "gdk.h"
   6
   7 /* Nothing much here now, but we have to make a start some time ;-) */
   8
   9 void
  10 gdk_dnd_set_drag_cursors(GdkCursor *default_cursor, GdkCursor *goahead_cursor)
  11 {
  12   gdk_dnd.c->gdk_cursor_dragdefault =
  13     ((GdkCursorPrivate *)default_cursor)->xcursor;
  14   gdk_dnd.c->gdk_cursor_dragok = ((GdkCursorPrivate *)goahead_cursor)->xcursor;
  15
  16   if(gdk_dnd.dnd_grabbed)
  17     {
  18       if(gdk_dnd.c->drag_pm_default)
  19         /* We were displaying pixmaps for the drag */
  20         {
  21           gdk_window_hide(gdk_dnd.c->drag_pm_default);
  22           gdk_window_unref(gdk_dnd.c->drag_pm_default);
  23           if(gdk_dnd.c->drag_pm_ok)
  24             {
  25               gdk_window_hide(gdk_dnd.c->drag_pm_ok);
  26               gdk_window_unref(gdk_dnd.c->drag_pm_ok);
  27             }
  28           gdk_dnd.c->drag_pm_default = gdk_dnd.c->drag_pm_ok = NULL;
  29         }
  30       gdk_dnd_display_drag_cursor(-1, -1,
  31                                   gdk_dnd.dnd_drag_target?TRUE:FALSE,
  32                                   TRUE);
  33     }
  34 }
  35
  36 void
  37 gdk_dnd_set_drag_shape(GdkWindow *default_pixmapwin,
  38                        GdkPoint *default_hotspot,
  39                        GdkWindow *goahead_pixmapwin,
  40                        GdkPoint *goahead_hotspot)
  41 {
  42   g_return_if_fail(default_pixmapwin != NULL);
  43
  44   if(gdk_dnd.c->drag_pm_default)
  45     gdk_window_unref(gdk_dnd.c->drag_pm_default);
  46   if(gdk_dnd.c->drag_pm_ok)
  47     gdk_window_unref(gdk_dnd.c->drag_pm_ok);
  48
  49   gdk_dnd.c->drag_pm_ok = NULL;
  50
  51   gdk_window_ref(default_pixmapwin);
  52   gdk_dnd.c->drag_pm_default = default_pixmapwin;
  53   gdk_dnd.c->default_hotspot = *default_hotspot;
  54   if(goahead_pixmapwin)
  55     {
  56       gdk_window_ref(goahead_pixmapwin);
  57       gdk_dnd.c->drag_pm_ok = goahead_pixmapwin;
  58       gdk_dnd.c->ok_hotspot = *goahead_hotspot;
  59     }
  60
  61   if(gdk_dnd.dnd_grabbed)
  62     {
  63       gdk_dnd_display_drag_cursor(-1, -1,
  64                                   gdk_dnd.dnd_drag_target?TRUE:FALSE,
  65                                   TRUE);
  66       XChangeActivePointerGrab (gdk_display,
  67                                 ButtonMotionMask |
  68                                 ButtonPressMask |
  69                                 ButtonReleaseMask |
  70                                 EnterWindowMask | LeaveWindowMask,
  71                                 None,
  72                                 CurrentTime);
  73     }
  74 }
  75
  76 void
  77 gdk_dnd_display_drag_cursor(gint x, gint y, gboolean drag_ok,
  78                             gboolean change_made)
  79 {
  80   if(!gdk_dnd.dnd_grabbed)
  81     return;
  82
  83   if(gdk_dnd.c->drag_pm_default)
  84     {
  85       /* We're doing pixmaps here... */
  86       GdkWindow *mypix, *opix;
  87       GdkPoint *myhotspot;
  88       gint itmp;
  89       Window wtmp;
  90
  91       if(x == -2 && y == -2) /* Hide the cursors */
  92         {
  93           gdk_window_hide(gdk_dnd.c->drag_pm_ok);
  94           gdk_window_hide(gdk_dnd.c->drag_pm_default);
  95           return;
  96         }
  97
  98       if(x == -1 && y == -1) /* We're supposed to find it out for ourselves */
  99         XQueryPointer(gdk_display, gdk_root_window,
 100                       &wtmp, &wtmp, &x, &y, &itmp, &itmp, &itmp);
 101
 102       if(drag_ok)
 103         {
 104           mypix = gdk_dnd.c->drag_pm_ok;
 105           opix = gdk_dnd.c->drag_pm_default;
 106           myhotspot = &gdk_dnd.c->ok_hotspot;
 107         }
 108       else
 109         {
 110           mypix = gdk_dnd.c->drag_pm_default;
 111           opix = gdk_dnd.c->drag_pm_ok;
 112           myhotspot = &gdk_dnd.c->default_hotspot;
 113         }
 114       if(change_made)
 115         {
 116           gdk_window_hide(opix);
 117           gdk_window_show(mypix); /* There ought to be a way to know if
 118                                      a window is already mapped etc. */
 119         }
 120       gdk_window_move(mypix, x - myhotspot->x, y - myhotspot->y);
 121     }
 122   else if(change_made)
 123     {
 124       Cursor c;
 125       /* Move cursors around */
 126       if(drag_ok)
 127         c = gdk_dnd.c->gdk_cursor_dragok;
 128       else
 129         c = gdk_dnd.c->gdk_cursor_dragdefault;
 130       XChangeActivePointerGrab (gdk_display,
 131                                 ButtonMotionMask |
 132                                 ButtonPressMask |
 133                                 ButtonReleaseMask |
 134                                 EnterWindowMask | LeaveWindowMask,
 135                                 c,
 136                                 CurrentTime);
 137     }
 138 }