chrome/browser/ui/gtk/custom_drag.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/ui/gtk/custom_drag.h"
   6
   7 #include "ui/base/dragdrop/gtk_dnd_util.h"
   8 #include "ui/gfx/image/image.h"
   9
  10 CustomDrag::CustomDrag(gfx::Image* icon, int code_mask, GdkDragAction action)
  11     : drag_widget_(gtk_invisible_new()),
  12       image_(icon) {
  13   g_signal_connect(drag_widget_, "drag-data-get",
  14                    G_CALLBACK(OnDragDataGetThunk), this);
  15   g_signal_connect(drag_widget_, "drag-begin",
  16                    G_CALLBACK(OnDragBeginThunk), this);
  17   g_signal_connect(drag_widget_, "drag-end",
  18                    G_CALLBACK(OnDragEndThunk), this);
  19
  20   GtkTargetList* list = ui::GetTargetListFromCodeMask(code_mask);
  21   GdkEvent* event = gtk_get_current_event();
  22   gtk_drag_begin(drag_widget_, list, action, 1, event);
  23   if (event)
  24     gdk_event_free(event);
  25   gtk_target_list_unref(list);
  26 }
  27
  28 CustomDrag::~CustomDrag() {
  29   gtk_widget_destroy(drag_widget_);
  30 }
  31
  32 void CustomDrag::OnDragBegin(GtkWidget* widget, GdkDragContext* drag_context) {
  33   if (image_)
  34     gtk_drag_set_icon_pixbuf(drag_context, image_->ToGdkPixbuf(), 0, 0);
  35 }
  36
  37 void CustomDrag::OnDragEnd(GtkWidget* widget, GdkDragContext* drag_context) {
  38   delete this;
  39 }