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win32: Fix DnD when drag icon is below the pointer

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By reverting gdk_drag_find_window_for_screen logic to what it was
before eb21a7df29.
The old logic knew how to ignore drag_window when searching
for dest_window, but that code was removed (I guess by accident).

https://bugzilla.gnome.org/show_bug.cgi?id=616544
This commit is contained in:
Dieter Verfaillie 2011-09-19 15:42:19 +02:00 committed by Alexander Larsson
parent 86b8a1ddc8
commit 5406955f7c
1 changed files with 60 additions and 19 deletions
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79
gdk/win32/gdkdnd-win32.c
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@ -2000,46 +2000,87 @@ _gdk_win32_window_get_drag_protocol (GdkWindow *window,
return protocol; return protocol;
} }
typedef struct {
gint x;
gint y;
HWND ignore;
HWND result;
} find_window_enum_arg;
static BOOL CALLBACK
find_window_enum_proc (HWND hwnd,
LPARAM lparam)
{
RECT rect;
POINT tl, br;
find_window_enum_arg *a = (find_window_enum_arg *) lparam;
if (hwnd == a->ignore)
return TRUE;
if (!IsWindowVisible (hwnd))
return TRUE;
tl.x = tl.y = 0;
ClientToScreen (hwnd, &tl);
GetClientRect (hwnd, &rect);
br.x = rect.right;
br.y = rect.bottom;
ClientToScreen (hwnd, &br);
if (a->x >= tl.x && a->y >= tl.y && a->x < br.x && a->y < br.y)
{
a->result = hwnd;
return FALSE;
}
else
return TRUE;
}
static GdkWindow * static GdkWindow *
gdk_win32_drag_context_find_window (GdkDragContext *context, gdk_win32_drag_context_find_window (GdkDragContext *context,
GdkWindow *drag_window, GdkWindow *drag_window,
GdkScreen *screen, GdkScreen *screen,
gint x_root, gint x_root,
gint y_root, gint y_root,
GdkDragProtocol *protocol) GdkDragProtocol *protocol)
{ {
GdkWindow *dest_window; GdkWindow *dest_window, *dw;
POINT pt; find_window_enum_arg a;
HWND hwnd;
pt.x = x_root - _gdk_offset_x; a.x = x_root - _gdk_offset_x;
pt.y = y_root - _gdk_offset_y; a.y = y_root - _gdk_offset_y;
a.ignore = drag_window ? GDK_WINDOW_HWND (drag_window) : NULL;
a.result = NULL;
hwnd = WindowFromPoint (pt); EnumWindows (find_window_enum_proc, (LPARAM) &a);
if (hwnd == NULL) if (a.result == NULL)
dest_window = NULL; dest_window = NULL;
else else
{ {
dest_window = gdk_win32_handle_table_lookup (hwnd); dw = gdk_win32_handle_table_lookup (a.result);
if (dest_window) if (dw)
g_object_ref (dest_window); {
dest_window = gdk_window_get_toplevel (dw);
g_object_ref (dest_window);
}
else else
dest_window = gdk_win32_window_foreign_new_for_display (_gdk_display, hwnd); dest_window = gdk_win32_window_foreign_new_for_display (_gdk_display, a.result);
if (use_ole2_dnd) if (use_ole2_dnd)
*protocol = GDK_DRAG_PROTO_OLE2; *protocol = GDK_DRAG_PROTO_OLE2;
else if (context->source_window) else if (context->source_window)
*protocol = GDK_DRAG_PROTO_LOCAL; *protocol = GDK_DRAG_PROTO_LOCAL;
else else
*protocol = GDK_DRAG_PROTO_WIN32_DROPFILES; *protocol = GDK_DRAG_PROTO_WIN32_DROPFILES;
} }
GDK_NOTE (DND, GDK_NOTE (DND,
g_print ("gdk_drag_find_window: %p %+d%+d: %p: %p %s\n", g_print ("gdk_drag_find_window: %p %+d%+d: %p: %p %s\n",
(drag_window ? GDK_WINDOW_HWND (drag_window) : NULL), (drag_window ? GDK_WINDOW_HWND (drag_window) : NULL),
x_root, y_root, x_root, y_root,
hwnd, a.result,
(dest_window ? GDK_WINDOW_HWND (dest_window) : NULL), (dest_window ? GDK_WINDOW_HWND (dest_window) : NULL),
_gdk_win32_drag_protocol_to_string (*protocol))); _gdk_win32_drag_protocol_to_string (*protocol)));