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// Copyright (c) 2011 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/base/dragdrop/drag_source_win.h"
namespace ui {
DragSourceWin::DragSourceWin() : cancel_drag_(false) {
}
HRESULT DragSourceWin::QueryContinueDrag(BOOL escape_pressed, DWORD key_state) {
if (cancel_drag_)
return DRAGDROP_S_CANCEL;
if (escape_pressed) {
OnDragSourceCancel();
return DRAGDROP_S_CANCEL;
}
if (!(key_state & MK_LBUTTON)) {
OnDragSourceDrop();
return DRAGDROP_S_DROP;
}
OnDragSourceMove();
return S_OK;
}
HRESULT DragSourceWin::GiveFeedback(DWORD effect) {
return DRAGDROP_S_USEDEFAULTCURSORS;
}
HRESULT DragSourceWin::QueryInterface(const IID& iid, void** object) {
*object = NULL;
if (IsEqualIID(iid, IID_IUnknown) || IsEqualIID(iid, IID_IDropSource)) {
*object = this;
} else {
return E_NOINTERFACE;
}
AddRef();
return S_OK;
}
ULONG DragSourceWin::AddRef() {
base::RefCountedThreadSafe<DragSourceWin>::AddRef();
return 0;
}
ULONG DragSourceWin::Release() {
base::RefCountedThreadSafe<DragSourceWin>::Release();
return 0;
}
} // namespace ui
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