Get drag and drop working for win aura.

ui/views/widget/desktop_aura/desktop_native_widget_aura.cc

 // 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.
 
 #include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
 
 #include "base/bind.h"
 #include "ui/aura/client/stacking_client.h"
 #include "ui/aura/focus_manager.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/root_window_host.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_property.h"
 #include "ui/base/hit_test.h"
 #include "ui/compositor/layer.h"
 #include "ui/gfx/canvas.h"
 #include "ui/native_theme/native_theme.h"
+#include "ui/views/drag_utils.h"
 #include "ui/views/ime/input_method.h"
 #include "ui/views/widget/desktop_aura/desktop_root_window_host.h"
+#include "ui/views/widget/drop_helper.h"
 #include "ui/views/widget/native_widget_aura_window_observer.h"
+#include "ui/views/widget/root_view.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_aura_utils.h"
 
 DECLARE_EXPORTED_WINDOW_PROPERTY_TYPE(VIEWS_EXPORT,
                                       views::DesktopNativeWidgetAura*);
 
 namespace views {
 
 DEFINE_WINDOW_PROPERTY_KEY(DesktopNativeWidgetAura*,
                            kDesktopNativeWidgetAuraKey, NULL);
@@ skipping 73 matching lines @@
   window_->Show();
 
   desktop_root_window_host_ = params.desktop_root_window_host ?
       params.desktop_root_window_host :
       DesktopRootWindowHost::Create(native_widget_delegate_,
                                     this, params.bounds);
   root_window_.reset(
       desktop_root_window_host_->Init(window_, params));
   stacking_client_.reset(
       new DesktopNativeWidgetAuraStackingClient(root_window_.get()));
+  drop_helper_.reset(new DropHelper(
+      static_cast<internal::RootView*>(GetWidget()->GetRootView())));
+  aura::client::SetDragDropDelegate(window_, this);
 
   aura::client::SetActivationDelegate(window_, this);
 }
 
 NonClientFrameView* DesktopNativeWidgetAura::CreateNonClientFrameView() {
   return desktop_root_window_host_->CreateNonClientFrameView();
 }
 
 bool DesktopNativeWidgetAura::ShouldUseNativeFrame() const {
   return desktop_root_window_host_->ShouldUseNativeFrame();
@@ skipping 240 matching lines @@
 }
 
 void DesktopNativeWidgetAura::FlashFrame(bool flash_frame) {
   desktop_root_window_host_->FlashFrame(flash_frame);
 }
 
 bool DesktopNativeWidgetAura::IsAccessibleWidget() const {
   return false;
 }
 
-void DesktopNativeWidgetAura::RunShellDrag(View* view,
+void DesktopNativeWidgetAura::RunShellDrag(
+    View* view,
                             const ui::OSExchangeData& data,
                             const gfx::Point& location,
                             int operation,
                             ui::DragDropTypes::DragEventSource source) {
+  views::RunShellDrag(window_, data, location, operation, source);
 }
 
 void DesktopNativeWidgetAura::SchedulePaintInRect(const gfx::Rect& rect) {
   if (window_)
     window_->SchedulePaintInRect(rect);
 }
 
 void DesktopNativeWidgetAura::SetCursor(gfx::NativeCursor cursor) {
   desktop_root_window_host_->AsRootWindowHost()->SetCursor(cursor);
 }
@@ skipping 201 matching lines @@
   if (IsVisible() && GetWidget()->non_client_view())
     GetWidget()->non_client_view()->SchedulePaint();
 }
 
 void DesktopNativeWidgetAura::OnLostActive() {
   native_widget_delegate_->OnNativeWidgetActivationChanged(false);
   if (IsVisible() && GetWidget()->non_client_view())
     GetWidget()->non_client_view()->SchedulePaint();
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// DesktopNativeWidgetAura, aura::WindowDragDropDelegate implementation:
+
+void DesktopNativeWidgetAura::OnDragEntered(const ui::DropTargetEvent& event) {
+  DCHECK(drop_helper_.get() != NULL);
+  last_drop_operation_ = drop_helper_->OnDragOver(event.data(),
+      event.location(), event.source_operations());
+}
+
+int DesktopNativeWidgetAura::OnDragUpdated(const ui::DropTargetEvent& event) {
+  DCHECK(drop_helper_.get() != NULL);
+  last_drop_operation_ = drop_helper_->OnDragOver(event.data(),
+      event.location(), event.source_operations());
+  return last_drop_operation_;
+}
+
+void DesktopNativeWidgetAura::OnDragExited() {
+  DCHECK(drop_helper_.get() != NULL);
+  drop_helper_->OnDragExit();
+}
+
+int DesktopNativeWidgetAura::OnPerformDrop(const ui::DropTargetEvent& event) {
+  DCHECK(drop_helper_.get() != NULL);
+  return drop_helper_->OnDrop(event.data(), event.location(),
+      last_drop_operation_);
+}
+
 }  // namespace views