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 #ifndef CONTENT_PUBLIC_BROWSER_WEB_DRAG_DEST_DELEGATE_H_ 6 #define CONTENT_PUBLIC_BROWSER_WEB_DRAG_DEST_DELEGATE_H_ 7 8 #include "base/strings/string16.h" 9 10 class GURL; 11 12 namespace ui { 13 class OSExchangeData; 14 } 15 16 namespace content { 17 class WebContents; 18 struct DropData; 19 20 // An optional delegate that listens for drags of bookmark data. 21 class WebDragDestDelegate { 22 public: 23 // Announces that a drag has started. It's valid that a drag starts, along 24 // with over/enter/leave/drop notifications without receiving any bookmark 25 // data. 26 virtual void DragInitialize(WebContents* contents) = 0; 27 28 // Notifications of drag progression. 29 virtual void OnDragOver() = 0; 30 virtual void OnDragEnter() = 0; 31 virtual void OnDrop() = 0; 32 // This should also clear any state kept about this drag. 33 virtual void OnDragLeave() = 0; 34 35 #if defined(USE_AURA) 36 // Called at the start of every drag to supply the data associated with the 37 // drag. 38 virtual void OnReceiveDragData(const ui::OSExchangeData& data) = 0; 39 #endif // USE_AURA 40 41 virtual ~WebDragDestDelegate() {} 42 }; 43 44 } // namespace content 45 46 #endif // CONTENT_PUBLIC_BROWSER_WEB_DRAG_DEST_DELEGATE_H_ 47
