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// Copyright (c) 2006-2008 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.
#ifndef CHROME_BROWSER_FRAME_VIEW_H__
#define CHROME_BROWSER_FRAME_VIEW_H__
#include <set>
#include "chrome/views/view.h"
class BrowserWindow;
class OSExchangeData;
// FrameView is the View that contains all the views of the BrowserWindow
// (XPFrame or VistaFrame). FrameView forwards all drag and drop messages to
// the TabStrip.
class FrameView : public ChromeViews::View {
public:
explicit FrameView(BrowserWindow* frame);
virtual ~FrameView() {}
// Adds view to the set of views that drops are allowed to occur on. You only
// need invoke this for views whose y-coordinate extends above the tab strip
// and you want to allow drops on.
void AddViewToDropList(ChromeViews::View* view);
protected:
// As long as ShouldForwardToTabStrip returns true, drag and drop methods
// are forwarded to the tab strip.
virtual bool CanDrop(const OSExchangeData& data);
virtual void OnDragEntered(const ChromeViews::DropTargetEvent& event);
virtual int OnDragUpdated(const ChromeViews::DropTargetEvent& event);
virtual void OnDragExited();
virtual int OnPerformDrop(const ChromeViews::DropTargetEvent& event);
// Returns true if the event should be forwarded to the TabStrip. This returns
// true if y coordinate is less than the bottom of the tab strip, and is not
// over another child view.
virtual bool ShouldForwardToTabStrip(
const ChromeViews::DropTargetEvent& event);
// Overriden to remove views from dropable_views_.
virtual void ViewHierarchyChanged(bool is_add, View* parent, View* child);
private:
// Creates and returns a new DropTargetEvent in the coordinates of the
// TabStrip.
ChromeViews::DropTargetEvent* MapEventToTabStrip(
const ChromeViews::DropTargetEvent& event);
// The BrowserWindow we're the child of.
BrowserWindow* window_;
// Initially set in CanDrop by invoking the same method on the TabStrip.
bool can_drop_;
// If true, drag and drop events are being forwarded to the tab strip.
// This is used to determine when to send OnDragExited and OnDragExited
// to the tab strip.
bool forwarding_to_tab_strip_;
// Set of additional views drops are allowed on. We do NOT own these.
std::set<ChromeViews::View*> dropable_views_;
DISALLOW_EVIL_CONSTRUCTORS(FrameView);
};
#endif // CHROME_BROWSER_FRAME_VIEW_H__
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