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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibGUI/AbstractSlider.h>
namespace GUI {
class Slider : public AbstractSlider {
C_OBJECT(Slider);
public:
enum class KnobSizeMode {
Fixed,
Proportional,
};
virtual ~Slider() override = default;
void set_knob_size_mode(KnobSizeMode mode) { m_knob_size_mode = mode; }
KnobSizeMode knob_size_mode() const { return m_knob_size_mode; }
int track_size() const { return 2; }
int track_margin() const { return 10; }
int knob_fixed_primary_size() const { return 8; }
int knob_secondary_size() const { return 20; }
bool knob_dragging() const { return m_dragging; }
Gfx::IntRect knob_rect() const;
Gfx::IntRect inner_rect() const
{
if (orientation() == Orientation::Horizontal)
return rect().shrunken(track_margin() * 2, 0);
return rect().shrunken(0, track_margin() * 2);
}
Function<void()> on_drag_start;
Function<void()> on_drag_end;
protected:
explicit Slider(Orientation = Orientation::Vertical);
virtual Optional<UISize> calculated_min_size() const override;
virtual Optional<UISize> calculated_preferred_size() const override;
virtual void paint_event(PaintEvent&) override;
void start_drag(Gfx::IntPoint);
virtual void mousedown_event(MouseEvent&) override;
virtual void mousemove_event(MouseEvent&) override;
void end_drag();
virtual void mouseup_event(MouseEvent&) override;
virtual void mousewheel_event(MouseEvent&) override;
virtual void leave_event(Core::Event&) override;
virtual void change_event(Event&) override;
private:
void set_knob_hovered(bool);
bool m_knob_hovered { false };
bool m_dragging { false };
int m_drag_origin_value { 0 };
Gfx::IntPoint m_drag_origin;
KnobSizeMode m_knob_size_mode { KnobSizeMode::Fixed };
};
class VerticalSlider final : public Slider {
C_OBJECT(VerticalSlider);
public:
virtual ~VerticalSlider() override = default;
private:
VerticalSlider()
: Slider(Orientation::Vertical)
{
}
};
class HorizontalSlider final : public Slider {
C_OBJECT(HorizontalSlider);
public:
virtual ~HorizontalSlider() override = default;
private:
HorizontalSlider()
: Slider(Orientation::Horizontal)
{
}
};
}
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