ui/base/dragdrop/drag_source_win.cc

   1 // Copyright (c) 2011 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 "ui/base/dragdrop/drag_source_win.h"
   6
   7 #include "ui/base/dragdrop/os_exchange_data_provider_win.h"
   8
   9 namespace ui {
  10
  11 DragSourceWin::DragSourceWin() : cancel_drag_(false), data_(nullptr) {
  12 }
  13
  14 HRESULT DragSourceWin::QueryContinueDrag(BOOL escape_pressed, DWORD key_state) {
  15   if (cancel_drag_)
  16     return DRAGDROP_S_CANCEL;
  17
  18   if (escape_pressed) {
  19     OnDragSourceCancel();
  20     return DRAGDROP_S_CANCEL;
  21   }
  22
  23   if (!(key_state & MK_LBUTTON)) {
  24     OnDragSourceDrop();
  25     return DRAGDROP_S_DROP;
  26   }
  27
  28   OnDragSourceMove();
  29   return S_OK;
  30 }
  31
  32 HRESULT DragSourceWin::GiveFeedback(DWORD effect) {
  33   return DRAGDROP_S_USEDEFAULTCURSORS;
  34 }
  35
  36 void DragSourceWin::OnDragSourceDrop() {
  37   DCHECK(data_);
  38   ui::OSExchangeDataProviderWin::GetDataObjectImpl(*data_)
  39       ->set_in_drag_loop(false);
  40 }
  41
  42 }  // namespace ui