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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_VIEWS_TABS_GLOW_HOVER_CONTROLLER_H_
#define CHROME_BROWSER_UI_VIEWS_TABS_GLOW_HOVER_CONTROLLER_H_
#include "base/memory/raw_ptr.h"
#include "chrome/browser/ui/tabs/tab_style.h"
#include "ui/gfx/animation/slide_animation.h"
#include "ui/views/animation/animation_delegate_views.h"
namespace views {
class View;
}
// GlowHoverController is responsible for drawing a hover effect and is used by
// the TabStrip. Typical usage:
// OnMouseEntered() -> invoke Show().
// OnMouseMoved() -> invoke SetLocation().
// OnMouseExited() -> invoke Hide().
// OnPaint() -> if ShouldDraw() returns true invoke Draw().
// Internally GlowHoverController uses an animation to animate the glow and
// invokes SchedulePaint() back on the View as necessary.
class GlowHoverController : public views::AnimationDelegateViews {
public:
explicit GlowHoverController(views::View* view);
GlowHoverController(const GlowHoverController&) = delete;
GlowHoverController& operator=(const GlowHoverController&) = delete;
~GlowHoverController() override;
// Sets the AnimationContainer used by the animation.
void SetAnimationContainer(gfx::AnimationContainer* container);
// Set opacity scale to use when Show is called with SUBTLE.
void SetSubtleOpacityScale(double opacity_scale);
// Initiates showing the hover.
void Show(TabStyle::ShowHoverStyle style);
// Hides the hover.
void Hide(TabStyle::HideHoverStyle style);
// Returns the value of the animation.
double GetAnimationValue() const;
SkAlpha GetAlpha() const;
// Returns true if there is something to be drawn. Use this instead of
// invoking Draw() if creating `mask_image` is expensive.
bool ShouldDraw() const;
// views::AnimationDelegateViews overrides:
void AnimationEnded(const gfx::Animation* animation) override;
void AnimationProgressed(const gfx::Animation* animation) override;
private:
// View we're drawing to.
raw_ptr<views::View> view_;
// Opacity of the glow ramps up over time.
gfx::SlideAnimation animation_;
double opacity_scale_;
double subtle_opacity_scale_;
};
#endif // CHROME_BROWSER_UI_VIEWS_TABS_GLOW_HOVER_CONTROLLER_H_
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