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