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