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// Copyright 2016 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_VIEWS_CONTROLS_BUTTON_TOGGLE_BUTTON_H_
#define UI_VIEWS_CONTROLS_BUTTON_TOGGLE_BUTTON_H_
#include <memory>
#include "base/optional.h"
#include "ui/gfx/animation/slide_animation.h"
#include "ui/views/controls/button/button.h"
namespace views {
// This view presents a button that has two states: on and off. This is similar
// to a checkbox but has no text and looks more like a two-state horizontal
// slider.
class VIEWS_EXPORT ToggleButton : public Button {
public:
METADATA_HEADER(ToggleButton);
explicit ToggleButton(ButtonListener* listener = nullptr);
~ToggleButton() override;
// AnimateIsOn() animates the state change to |is_on|; SetIsOn() doesn't.
void AnimateIsOn(bool is_on);
void SetIsOn(bool is_on);
bool GetIsOn() const;
void SetThumbOnColor(const base::Optional<SkColor>& thumb_on_color);
base::Optional<SkColor> GetThumbOnColor() const;
void SetThumbOffColor(const base::Optional<SkColor>& thumb_off_color);
base::Optional<SkColor> GetThumbOffColor() const;
void SetTrackOnColor(const base::Optional<SkColor>& track_on_color);
base::Optional<SkColor> GetTrackOnColor() const;
void SetTrackOffColor(const base::Optional<SkColor>& track_off_color);
base::Optional<SkColor> GetTrackOffColor() const;
void SetAcceptsEvents(bool accepts_events);
bool GetAcceptsEvents() const;
// views::View:
gfx::Size CalculatePreferredSize() const override;
private:
friend class TestToggleButton;
class ThumbView;
// Calculates and returns the bounding box for the track.
gfx::Rect GetTrackBounds() const;
// Calculates and returns the bounding box for the thumb (the circle).
gfx::Rect GetThumbBounds() const;
// Updates position of the thumb.
void UpdateThumb();
SkColor GetTrackColor(bool is_on) const;
// views::View:
bool CanAcceptEvent(const ui::Event& event) override;
void OnBoundsChanged(const gfx::Rect& previous_bounds) override;
void OnThemeChanged() override;
void GetAccessibleNodeData(ui::AXNodeData* node_data) override;
void OnFocus() override;
void OnBlur() override;
// Button:
void NotifyClick(const ui::Event& event) override;
void PaintButtonContents(gfx::Canvas* canvas) override;
void AddInkDropLayer(ui::Layer* ink_drop_layer) override;
void RemoveInkDropLayer(ui::Layer* ink_drop_layer) override;
std::unique_ptr<InkDrop> CreateInkDrop() override;
std::unique_ptr<InkDropRipple> CreateInkDropRipple() const override;
SkColor GetInkDropBaseColor() const override;
// gfx::AnimationDelegate:
void AnimationProgressed(const gfx::Animation* animation) override;
gfx::SlideAnimation slide_animation_{this};
ThumbView* thumb_view_;
base::Optional<SkColor> track_on_color_;
base::Optional<SkColor> track_off_color_;
// When false, this button won't accept input. Different from View::SetEnabled
// in that the view retains focus when this is false but not when disabled.
bool accepts_events_ = true;
DISALLOW_COPY_AND_ASSIGN(ToggleButton);
};
} // namespace views
#endif // UI_VIEWS_CONTROLS_BUTTON_TOGGLE_BUTTON_H_
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