| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTIOP_DROP_TARGET_WIN_H_ |
| #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTIOP_DROP_TARGET_WIN_H_ |
| |
| #include <memory> |
| |
| #include "base/macros.h" |
| #include "ui/aura/window_observer.h" |
| #include "ui/base/dragdrop/drop_target_win.h" |
| |
| namespace aura { |
| namespace client { |
| class DragDropDelegate; |
| } |
| } |
| |
| namespace ui { |
| class DropTargetEvent; |
| class OSExchangeData; |
| } |
| |
| namespace views { |
| |
| // DesktopDropTargetWin takes care of managing drag and drop for |
| // DesktopWindowTreeHostWin. It converts Windows OLE drop messages into |
| // aura::client::DragDropDelegate calls. |
| class DesktopDropTargetWin : public ui::DropTargetWin, |
| public aura::WindowObserver { |
| public: |
| explicit DesktopDropTargetWin(aura::Window* root_window); |
| ~DesktopDropTargetWin() override; |
| |
| private: |
| // ui::DropTargetWin implementation: |
| DWORD OnDragEnter(IDataObject* data_object, |
| DWORD key_state, |
| POINT position, |
| DWORD effect) override; |
| DWORD OnDragOver(IDataObject* data_object, |
| DWORD key_state, |
| POINT position, |
| DWORD effect) override; |
| void OnDragLeave(IDataObject* data_object) override; |
| DWORD OnDrop(IDataObject* data_object, |
| DWORD key_state, |
| POINT position, |
| DWORD effect) override; |
| |
| // aura::WindowObserver implementation: |
| void OnWindowDestroyed(aura::Window* window) override; |
| |
| // Common functionality for the ui::DropTargetWin methods to translate from |
| // COM data types to Aura ones. |
| void Translate(IDataObject* data_object, |
| DWORD key_state, |
| POINT cursor_position, |
| DWORD effect, |
| std::unique_ptr<ui::OSExchangeData>* data, |
| std::unique_ptr<ui::DropTargetEvent>* event, |
| aura::client::DragDropDelegate** delegate); |
| |
| void NotifyDragLeave(); |
| |
| // The root window associated with this drop target. |
| aura::Window* root_window_; |
| |
| // The Aura window that is currently under the cursor. We need to manually |
| // keep track of this because Windows will only call our drag enter method |
| // once when the user enters the associated HWND. But inside that HWND there |
| // could be multiple aura windows, so we need to generate drag enter events |
| // for them. |
| aura::Window* target_window_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DesktopDropTargetWin); |
| }; |
| |
| } // namespace views |
| |
| #endif // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTIOP_DROP_TARGET_WIN_H_ |