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// Copyright 2013 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_CAPTION_BUTTON_H_
#define ASH_FRAME_CAPTION_BUTTONS_FRAME_CAPTION_BUTTON_H_
#include "ash/ash_export.h"
#include "ash/frame/caption_buttons/caption_button_types.h"
#include "base/memory/scoped_ptr.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/views/controls/button/custom_button.h"
namespace gfx {
class SlideAnimation;
}
namespace ash {
// Base class for the window caption buttons (minimize, maximize, restore,
// close).
class ASH_EXPORT FrameCaptionButton : public views::CustomButton {
public:
enum Animate {
ANIMATE_YES,
ANIMATE_NO
};
static const char kViewClassName[];
FrameCaptionButton(views::ButtonListener* listener, CaptionButtonIcon icon);
~FrameCaptionButton() override;
// Sets the images to use to paint the button. If |animate| is ANIMATE_YES,
// the button crossfades to the new visuals. If the image ids match those
// currently used by the button and |animate| is ANIMATE_NO the crossfade
// animation is progressed to the end.
void SetImages(CaptionButtonIcon icon,
Animate animate,
int icon_image_id,
int inactive_icon_image_id,
int hovered_background_image_id,
int pressed_background_image_id);
// Returns true if the button is crossfading to new visuals set in
// SetImages().
bool IsAnimatingImageSwap() const;
// Sets the alpha to use for painting. Used to animate visibility changes.
void SetAlpha(int alpha);
// views::View overrides:
gfx::Size GetPreferredSize() const override;
const char* GetClassName() const override;
void OnPaint(gfx::Canvas* canvas) override;
void set_paint_as_active(bool paint_as_active) {
paint_as_active_ = paint_as_active;
}
CaptionButtonIcon icon() const {
return icon_;
}
int icon_image_id() const { return icon_image_id_; }
protected:
// views::CustomButton override:
void OnGestureEvent(ui::GestureEvent* event) override;
private:
// Returns the icon image to paint based on |paint_as_active_|.
const gfx::ImageSkia& GetIconImageToPaint() const;
// Paints |to_center| centered within the button with |alpha|.
void PaintCentered(gfx::Canvas* canvas,
const gfx::ImageSkia& to_center,
int alpha);
// The button's current icon.
CaptionButtonIcon icon_;
// Whether the button should be painted as active.
bool paint_as_active_;
// Current alpha to use for painting.
int alpha_;
// The images and image ids used to paint the button.
int icon_image_id_;
int inactive_icon_image_id_;
int hovered_background_image_id_;
int pressed_background_image_id_;
gfx::ImageSkia icon_image_;
gfx::ImageSkia inactive_icon_image_;
gfx::ImageSkia hovered_background_image_;
gfx::ImageSkia pressed_background_image_;
// The icon image to crossfade from.
gfx::ImageSkia crossfade_icon_image_;
// Crossfade animation started when the button's images are changed by
// SetImages().
scoped_ptr<gfx::SlideAnimation> swap_images_animation_;
DISALLOW_COPY_AND_ASSIGN(FrameCaptionButton);
};
} // namespace ash
#endif // ASH_FRAME_CAPTION_BUTTONS_FRAME_CAPTION_BUTTON_H_
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