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 #ifndef UI_VIEWS_WIDGET_DROP_TARGET_WIN_H_ 6 #define UI_VIEWS_WIDGET_DROP_TARGET_WIN_H_ 7 8 #include "ui/base/dragdrop/drop_target_win.h" 9 #include "ui/views/widget/drop_helper.h" 10 11 namespace views { 12 13 class View; 14 namespace internal { 15 class RootView; 16 } 17 18 // DropTargetWin takes care of managing drag and drop for NativeWidgetWin. It 19 // converts Windows OLE drop messages into Views drop messages. 20 // 21 // DropTargetWin uses DropHelper to manage the appropriate view to target 22 // drop messages at. 23 class DropTargetWin : public ui::DropTargetWin { 24 public: 25 explicit DropTargetWin(internal::RootView* root_view); 26 virtual ~DropTargetWin(); 27 28 // If a drag and drop is underway and view is the current drop target, the 29 // drop target is set to null. 30 // This is invoked when a View is removed from the RootView to make sure 31 // we don't target a view that was removed during dnd. 32 void ResetTargetViewIfEquals(View* view); 33 34 protected: 35 virtual DWORD OnDragOver(IDataObject* data_object, 36 DWORD key_state, 37 POINT cursor_position, 38 DWORD effect); 39 40 virtual void OnDragLeave(IDataObject* data_object); 41 42 virtual DWORD OnDrop(IDataObject* data_object, 43 DWORD key_state, 44 POINT cursor_position, 45 DWORD effect); 46 47 private: 48 views::DropHelper helper_; 49 50 DISALLOW_COPY_AND_ASSIGN(DropTargetWin); 51 }; 52 53 } // namespace views 54 55 #endif // UI_VIEWS_WIDGET_DROP_TARGET_WIN_H_ 56
