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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_TOUCH_SELECTION_TOUCH_HANDLE_DRAWABLE_AURA_H_
#define UI_TOUCH_SELECTION_TOUCH_HANDLE_DRAWABLE_AURA_H_
#include "base/memory/raw_ptr.h"
#include "base/scoped_observation.h"
#include "ui/base/models/image_model.h"
#include "ui/compositor/layer_delegate.h"
#include "ui/native_theme/native_theme_observer.h"
#include "ui/touch_selection/touch_handle.h"
#include "ui/touch_selection/touch_handle_orientation.h"
#include "ui/touch_selection/ui_touch_selection_export.h"
namespace aura {
class Window;
}
namespace ui {
class UI_TOUCH_SELECTION_EXPORT TouchHandleDrawableAura
: public TouchHandleDrawable,
public LayerDelegate,
public NativeThemeObserver {
public:
explicit TouchHandleDrawableAura(aura::Window* parent);
TouchHandleDrawableAura(const TouchHandleDrawableAura&) = delete;
TouchHandleDrawableAura& operator=(const TouchHandleDrawableAura&) = delete;
~TouchHandleDrawableAura() override;
private:
// Updates the bounds of the window containing the handle image.
void UpdateWindowBounds();
bool IsVisible() const;
// TouchHandleDrawable:
void SetEnabled(bool enabled) override;
void SetOrientation(TouchHandleOrientation orientation,
bool mirror_vertical,
bool mirror_horizontal) override;
void SetOrigin(const gfx::PointF& position) override;
void SetAlpha(float alpha) override;
gfx::RectF GetVisibleBounds() const override;
float GetDrawableHorizontalPaddingRatio() const override;
// LayerDelegate:
void OnPaintLayer(const PaintContext& context) override;
void OnDeviceScaleFactorChanged(float old_device_scale_factor,
float new_device_scale_factor) override {}
// NativeThemeObserver:
void OnNativeThemeUpdated(NativeTheme* observed_theme) override;
// The window for drawing the handle image. This doesn't include invisible
// padding which is applied around the handle image.
std::unique_ptr<aura::Window> window_;
bool enabled_;
// Used to set the opacity of the handle drawable. The actual handle opacity
// is further scaled by a max opacity value (since the handle can be slightly
// transparent by default).
float alpha_;
TouchHandleOrientation orientation_;
// The origin of the targetable area of the touch handle, in coordinates of
// the handle window's parent. When drawing the handle image, an additional
// offset should be applied to this origin to account for invisible padding.
gfx::PointF targetable_origin_;
// The handle image to draw.
ImageModel handle_image_;
base::ScopedObservation<NativeTheme, NativeThemeObserver> theme_observation_{
this};
};
} // namespace ui
#endif // UI_TOUCH_SELECTION_TOUCH_HANDLE_DRAWABLE_AURA_H_
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