WINGs/dragdestination.c

   1
   2
   3 #include <X11/Xatom.h>
   4
   5 #include "WINGsP.h"
   6
   7
   8 /* dropping */
   9
  10 typedef struct W_DNDTargetInfo {
  11     /* data types accepted for drops */
  12     Atom *dropTypes;
  13     int dropTypeCount;
  14
  15
  16 } DNDTargetInfo;
  17
  18
  19 static Atom XDNDversion = XDND_VERSION;
  20
  21
  22 static void
  23 realizedObserver(void *self, WMNotification *notif)
  24 {
  25     WMView *view = (WMView*)WMGetNotificationObject(notif);
  26
  27     XChangeProperty(W_VIEW_SCREEN(view)->display, W_VIEW_DRAWABLE(view),
  28                     W_VIEW_SCREEN(view)->xdndAwareAtom,
  29                     XA_ATOM, 32, PropModeReplace,
  30                     (unsigned char*)&XDNDversion, 1);
  31
  32     WMRemoveNotificationObserver(self);
  33 }
  34
  35
  36 void
  37 W_SetXdndAwareProperty(WMScreen *scr, WMView *view, Atom *types, int typeCount)
  38 {
  39     Display *dpy = scr->display;
  40
  41     view = W_TopLevelOfView(view);
  42
  43     if (!view->flags.xdndHintSet) {
  44         view->flags.xdndHintSet = 1;
  45
  46         if (view->flags.realized) {
  47             XChangeProperty(dpy, W_VIEW_DRAWABLE(view), scr->xdndAwareAtom,
  48                             XA_ATOM, 32, PropModeReplace,
  49                             (unsigned char*)&XDNDversion, 1);
  50         } else {
  51             WMAddNotificationObserver(realizedObserver, view,
  52                                       WMViewRealizedNotification,
  53                                       /* just use as an id */
  54                                       view->dragDestinationProcs);
  55         }
  56     }
  57 }
  58
  59
  60
  61
  62 WMData*
  63 WMGetDroppedData(WMView *view, WMDraggingInfo *info)
  64 {
  65     return NULL;
  66 }
  67
  68
  69 void
  70 WMRegisterViewForDraggedTypes(WMView *view, char *acceptedTypes[])
  71 {
  72     Atom *types;
  73     int typeCount;
  74     int i;
  75
  76     typeCount = 0;
  77     while (acceptedTypes[typeCount++]);
  78
  79     types = wmalloc(sizeof(Atom)*(typeCount+1));
  80
  81     for (i = 0; i < typeCount; i++) {
  82         types[i] = XInternAtom(W_VIEW_SCREEN(view)->display,
  83                                acceptedTypes[i], False);
  84     }
  85     types[i] = 0;
  86
  87     view->droppableTypes = types;
  88
  89     W_SetXdndAwareProperty(W_VIEW_SCREEN(view), view, types, typeCount);
  90 }
  91
  92
  93 void
  94 WMUnregisterViewDraggedTypes(WMView *view)
  95 {
  96     if (view->droppableTypes != NULL)
  97         free(view->droppableTypes);
  98     view->droppableTypes = NULL;
  99 }
 100
 101 /***********************************************************************/
 102
 103 void
 104 WMSetViewDragDestinationProcs(WMView *view, WMDragDestinationProcs *procs)
 105 {
 106     if (view->dragDestinationProcs == NULL) {
 107         free(view->dragDestinationProcs);
 108         view->dragDestinationProcs = wmalloc(sizeof(WMDragDestinationProcs));
 109     }
 110     *view->dragDestinationProcs = *procs;
 111
 112     /*XXX fill in non-implemented stuffs */
 113 }
 114
 115
 116
 117
 118