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      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 #include "ui/views/widget/drop_target_win.h"
      6 
      7 #include "ui/base/dragdrop/drag_drop_types.h"
      8 #include "ui/base/dragdrop/os_exchange_data.h"
      9 #include "ui/base/dragdrop/os_exchange_data_provider_win.h"
     10 #include "ui/gfx/point.h"
     11 #include "ui/views/widget/root_view.h"
     12 #include "ui/views/widget/widget.h"
     13 
     14 using ui::OSExchangeData;
     15 using ui::OSExchangeDataProviderWin;
     16 
     17 namespace views {
     18 
     19 DropTargetWin::DropTargetWin(internal::RootView* root_view)
     20     : ui::DropTargetWin(root_view->GetWidget()->GetNativeView()),
     21       helper_(root_view) {
     22 }
     23 
     24 DropTargetWin::~DropTargetWin() {
     25 }
     26 
     27 void DropTargetWin::ResetTargetViewIfEquals(View* view) {
     28   helper_.ResetTargetViewIfEquals(view);
     29 }
     30 
     31 DWORD DropTargetWin::OnDragOver(IDataObject* data_object,
     32                                 DWORD key_state,
     33                                 POINT cursor_position,
     34                                 DWORD effect) {
     35   gfx::Point root_view_location(cursor_position.x, cursor_position.y);
     36   View::ConvertPointFromScreen(helper_.root_view(), &root_view_location);
     37   OSExchangeData data(new OSExchangeDataProviderWin(data_object));
     38   int drop_operation =
     39       helper_.OnDragOver(data, root_view_location,
     40                          ui::DragDropTypes::DropEffectToDragOperation(effect));
     41   return ui::DragDropTypes::DragOperationToDropEffect(drop_operation);
     42 }
     43 
     44 void DropTargetWin::OnDragLeave(IDataObject* data_object) {
     45   helper_.OnDragExit();
     46 }
     47 
     48 DWORD DropTargetWin::OnDrop(IDataObject* data_object,
     49                             DWORD key_state,
     50                             POINT cursor_position,
     51                             DWORD effect) {
     52   gfx::Point root_view_location(cursor_position.x, cursor_position.y);
     53   View::ConvertPointFromScreen(helper_.root_view(), &root_view_location);
     54 
     55   OSExchangeData data(new OSExchangeDataProviderWin(data_object));
     56   int drop_operation = ui::DragDropTypes::DropEffectToDragOperation(effect);
     57   drop_operation = helper_.OnDragOver(data, root_view_location,
     58                                       drop_operation);
     59   drop_operation = helper_.OnDrop(data, root_view_location, drop_operation);
     60   return ui::DragDropTypes::DragOperationToDropEffect(drop_operation);
     61 }
     62 
     63 }  // namespace views
     64