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// Copyright (c) 2012 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 ASH_TOOLTIPS_TOOLTIP_CONTROLLER_H_
#define ASH_TOOLTIPS_TOOLTIP_CONTROLLER_H_
#include "ash/ash_export.h"
#include "ash/wm/session_state_observer.h"
#include "base/memory/scoped_ptr.h"
#include "base/string16.h"
#include "base/timer.h"
#include "ui/aura/client/tooltip_client.h"
#include "ui/aura/window_observer.h"
#include "ui/base/events/event_handler.h"
#include "ui/gfx/point.h"
namespace aura {
class Window;
namespace client {
class DragDropClient;
}
}
namespace ash {
namespace test {
class TooltipControllerTest;
} // namespace test
namespace internal {
// TooltipController provides tooltip functionality for aura shell.
class ASH_EXPORT TooltipController : public aura::client::TooltipClient,
public ui::EventHandler,
public aura::WindowObserver,
public SessionStateObserver {
public:
explicit TooltipController(aura::client::DragDropClient* drag_drop_client);
virtual ~TooltipController();
// Overridden from aura::client::TooltipClient.
virtual void UpdateTooltip(aura::Window* target) OVERRIDE;
virtual void SetTooltipsEnabled(bool enable) OVERRIDE;
// Overridden from ui::EventHandler.
virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
// Overridden from SessionStateController.
virtual void OnSessionStateEvent(SessionStateObserver::EventType event)
OVERRIDE;
// Overridden from aura::WindowObserver.
virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
gfx::Point mouse_location() const { return curr_mouse_loc_; }
private:
friend class ash::test::TooltipControllerTest;
class Tooltip;
// Trims the tooltip to fit, setting |text| to the clipped result,
// |max_width| to the width (in pixels) of the clipped text and |line_count|
// to the number of lines of text in the tooltip. |x| and |y| give the
// location of the tooltip in screen coordinates.
static void TrimTooltipToFit(string16* text,
int* max_width,
int* line_count,
int x,
int y);
void TooltipTimerFired();
void TooltipShownTimerFired();
// Updates the tooltip if required (if there is any change in the tooltip
// text or the aura::Window.
void UpdateIfRequired();
// Only used in tests.
bool IsTooltipVisible();
bool IsDragDropInProgress();
// This lazily creates the Tooltip instance so that the tooltip window will
// be initialized with appropriate drop shadows.
Tooltip* GetTooltip();
aura::client::DragDropClient* drag_drop_client_;
aura::Window* tooltip_window_;
string16 tooltip_text_;
// These fields are for tracking state when the user presses a mouse button.
aura::Window* tooltip_window_at_mouse_press_;
string16 tooltip_text_at_mouse_press_;
bool mouse_pressed_;
scoped_ptr<Tooltip> tooltip_;
base::RepeatingTimer<TooltipController> tooltip_timer_;
// Timer to timeout the life of an on-screen tooltip. We hide the tooltip when
// this timer fires.
base::OneShotTimer<TooltipController> tooltip_shown_timer_;
gfx::Point curr_mouse_loc_;
bool tooltips_enabled_;
DISALLOW_COPY_AND_ASSIGN(TooltipController);
};
} // namespace internal
} // namespace ash
#endif // ASH_TOOLTIPS_TOOLTIP_CONTROLLER_H_
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