src/ui/views/widget/desktop_aura/desktop_drag_drop_client_win.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 "ui/views/widget/desktop_aura/desktop_drag_drop_client_win.h"
   6
   7 #include "ui/base/dragdrop/drag_drop_types.h"
   8 #include "ui/base/dragdrop/drag_source_win.h"
   9 #include "ui/base/dragdrop/drop_target_event.h"
  10 #include "ui/base/dragdrop/os_exchange_data_provider_win.h"
  11 #include "ui/views/widget/desktop_aura/desktop_drop_target_win.h"
  12 #include "ui/views/widget/desktop_aura/desktop_root_window_host_win.h"
  13 #include "ui/views/widget/drop_target_win.h"
  14
  15 namespace views {
  16
  17 DesktopDragDropClientWin::DesktopDragDropClientWin(
  18     aura::Window* root_window,
  19     HWND window)
  20     : drag_drop_in_progress_(false),
  21       drag_operation_(0) {
  22   drop_target_ = new DesktopDropTargetWin(root_window, window);
  23 }
  24
  25 DesktopDragDropClientWin::~DesktopDragDropClientWin() {
  26 }
  27
  28 int DesktopDragDropClientWin::StartDragAndDrop(
  29     const ui::OSExchangeData& data,
  30     aura::Window* root_window,
  31     aura::Window* source_window,
  32     const gfx::Point& root_location,
  33     int operation,
  34     ui::DragDropTypes::DragEventSource source) {
  35   drag_drop_in_progress_ = true;
  36   drag_operation_ = operation;
  37
  38   drag_source_ = new ui::DragSourceWin;
  39   DWORD effect;
  40   HRESULT result = DoDragDrop(
  41       ui::OSExchangeDataProviderWin::GetIDataObject(data),
  42       drag_source_,
  43       ui::DragDropTypes::DragOperationToDropEffect(operation),
  44       &effect);
  45
  46   drag_drop_in_progress_ = false;
  47
  48   if (result != DRAGDROP_S_DROP)
  49     effect = DROPEFFECT_NONE;
  50
  51   return ui::DragDropTypes::DropEffectToDragOperation(effect);
  52 }
  53
  54 void DesktopDragDropClientWin::DragUpdate(aura::Window* target,
  55                                           const ui::LocatedEvent& event) {
  56 }
  57
  58 void DesktopDragDropClientWin::Drop(aura::Window* target,
  59                                     const ui::LocatedEvent& event) {
  60 }
  61
  62 void DesktopDragDropClientWin::DragCancel() {
  63   drag_source_->CancelDrag();
  64   drag_operation_ = 0;
  65 }
  66
  67 bool DesktopDragDropClientWin::IsDragDropInProgress() {
  68   return drag_drop_in_progress_;
  69 }
  70
  71 void DesktopDragDropClientWin::OnNativeWidgetDestroying(HWND window) {
  72   if (drop_target_.get()) {
  73     RevokeDragDrop(window);
  74     drop_target_ = NULL;
  75   }
  76 }
  77
  78 }  // namespace views