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// Copyright 2014 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_FRAME_CAPTION_BUTTONS_FRAME_SIZE_BUTTON_H_
#define ASH_FRAME_CAPTION_BUTTONS_FRAME_SIZE_BUTTON_H_
#include "ash/ash_export.h"
#include "ash/frame/caption_buttons/frame_caption_button.h"
#include "ash/frame/caption_buttons/frame_size_button_delegate.h"
#include "base/timer/timer.h"
namespace views {
class Widget;
}
namespace ash {
class FrameSizeButtonDelegate;
class PhantomWindowController;
// The maximize/restore button.
// When the mouse is pressed over the size button or the size button is touched:
// - The minimize and close buttons are set to snap left and snap right
// respectively.
// - The size button stays pressed while the mouse is over the buttons to snap
// left and to snap right. The button underneath the mouse is hovered.
// When the drag terminates, the action for the button underneath the mouse
// is executed. For the sake of simplicity, the size button is the event
// handler for a click starting on the size button and the entire drag.
class ASH_EXPORT FrameSizeButton : public FrameCaptionButton {
public:
FrameSizeButton(views::ButtonListener* listener,
views::Widget* frame,
FrameSizeButtonDelegate* delegate);
virtual ~FrameSizeButton();
// views::CustomButton overrides:
virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE;
virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
virtual void OnMouseCaptureLost() OVERRIDE;
virtual void OnMouseMoved(const ui::MouseEvent& event) OVERRIDE;
virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
void set_delay_to_set_buttons_to_snap_mode(int delay_ms) {
set_buttons_to_snap_mode_delay_ms_ = delay_ms;
}
private:
enum SnapType {
SNAP_LEFT,
SNAP_RIGHT,
SNAP_NONE
};
// Starts |set_buttons_to_snap_mode_timer_|.
void StartSetButtonsToSnapModeTimer(const ui::LocatedEvent& event);
// Animates the buttons adjacent to the size button to snap left and right.
void AnimateButtonsToSnapMode();
// Sets the buttons adjacent to the size button to snap left and right.
// Passing in ANIMATE_NO progresses the animation (if any) to the end.
void SetButtonsToSnapMode(FrameSizeButtonDelegate::Animate animate);
// Updates |snap_type_|, whether the size button is pressed and whether any
// other buttons are hovered.
void UpdateSnapType(const ui::LocatedEvent& event);
// Returns the button which should be hovered (if any) while in "snap mode"
// for |event_location_in_screen|.
const FrameCaptionButton* GetButtonToHover(
const gfx::Point& event_location_in_screen) const;
// Snaps |frame_| according to |snap_type_|. Returns true if |frame_| was
// snapped.
bool CommitSnap(const ui::LocatedEvent& event);
// Sets the buttons adjacent to the size button to minimize and close again.
// Clears any state set while snapping was enabled. |animate| indicates
// whether the buttons should animate back to their original icons.
void SetButtonsToNormalMode(FrameSizeButtonDelegate::Animate animate);
// Widget that the size button acts on.
views::Widget* frame_;
// Not owned.
FrameSizeButtonDelegate* delegate_;
// Location of the event which started |set_buttons_to_snap_mode_timer_| in
// view coordinates.
gfx::Point set_buttons_to_snap_mode_timer_event_location_;
// The delay between the user pressing the size button and the buttons
// adjacent to the size button morphing into buttons for snapping left and
// right.
int set_buttons_to_snap_mode_delay_ms_;
base::OneShotTimer<FrameSizeButton> set_buttons_to_snap_mode_timer_;
// Whether the buttons adjacent to the size button snap the window left and
// right.
bool in_snap_mode_;
// The action to execute when the drag/click is ended. If
// |snap_type_| == SNAP_NONE, the size button's default action is run when the
// drag/click is ended.
SnapType snap_type_;
// Displays a preview of how the window's bounds will change as a result of
// snapping the window left or right. The preview is only visible if the snap
// left or snap right button is pressed.
scoped_ptr<PhantomWindowController> phantom_window_controller_;
DISALLOW_COPY_AND_ASSIGN(FrameSizeButton);
};
} // namespace ash
#endif // ASH_FRAME_CAPTION_BUTTONS_FRAME_SIZE_BUTTON_H_
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