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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.
#ifndef UI_UI_VIEWS_TOUCHUI_TOUCH_SELECTION_CONTROLLER_IMPL_H_
#define UI_UI_VIEWS_TOUCHUI_TOUCH_SELECTION_CONTROLLER_IMPL_H_
#pragma once
#include "base/timer.h"
#include "ui/gfx/point.h"
#include "ui/views/touchui/touch_selection_controller.h"
#include "views/view.h"
#include "views/views_export.h"
namespace views {
// Touch specific implementation of TouchSelectionController. Responsible for
// displaying selection handles and menu elements relevant in a touch interface.
class VIEWS_EXPORT TouchSelectionControllerImpl
: public TouchSelectionController {
public:
// Use TextSelectionController::create().
explicit TouchSelectionControllerImpl(TouchSelectionClientView* client_view);
virtual ~TouchSelectionControllerImpl();
// TextSelectionController.
virtual void SelectionChanged(const gfx::Point& p1,
const gfx::Point& p2) OVERRIDE;
virtual void ClientViewLostFocus() OVERRIDE;
private:
friend class TouchSelectionControllerImplTest;
class SelectionHandleView;
class TouchContextMenuView;
// Callback to inform the client view that the selection handle has been
// dragged, hence selection may need to be updated.
void SelectionHandleDragged(const gfx::Point& drag_pos);
// Convenience method to convert a point from a selection handle's coordinate
// system to that of the client view.
void ConvertPointToClientView(SelectionHandleView* source, gfx::Point* point);
// Checks if the client view supports a context menu command.
bool IsCommandIdEnabled(int command_id) const;
// Sends a context menu command to the client view.
void ExecuteCommand(int command_id);
// Time to show context menu.
void ContextMenuTimerFired();
// Convenience method to update the position/visibility of the context menu.
void UpdateContextMenu(const gfx::Point& p1, const gfx::Point& p2);
// Convenience method for hiding context menu.
void HideContextMenu();
// Convenience methods for testing.
gfx::Point GetSelectionHandle1Position();
gfx::Point GetSelectionHandle2Position();
bool IsSelectionHandle1Visible();
bool IsSelectionHandle2Visible();
TouchSelectionClientView* client_view_;
scoped_ptr<SelectionHandleView> selection_handle_1_;
scoped_ptr<SelectionHandleView> selection_handle_2_;
scoped_ptr<TouchContextMenuView> context_menu_;
// Timer to trigger |context_menu| (|context_menu| is not shown if the
// selection handles are being updated. It appears only when the handles are
// stationary for a certain amount of time).
base::OneShotTimer<TouchSelectionControllerImpl> context_menu_timer_;
// Pointer to the SelectionHandleView being dragged during a drag session.
SelectionHandleView* dragging_handle_;
DISALLOW_COPY_AND_ASSIGN(TouchSelectionControllerImpl);
};
} // namespace views
#endif // UI_UI_VIEWS_TOUCHUI_TOUCH_SELECTION_CONTROLLER_IMPL_H_
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