ladybird/Libraries/LibGUI/GSlider.h

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#pragma once
#include <LibGUI/GWidget.h>
class GSlider : public GWidget {
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C_OBJECT(GSlider)
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public:
enum class KnobSizeMode {
Fixed,
Proportional,
};
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virtual ~GSlider() override;
Orientation orientation() const { return m_orientation; }
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int value() const { return m_value; }
int min() const { return m_min; }
int max() const { return m_max; }
void set_range(int min, int max);
void set_value(int);
void set_min(int min) { set_range(min, max()); }
void set_max(int max) { set_range(min(), max); }
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 knob_fixed_primary_size() const { return 8; }
int knob_secondary_size() const { return 20; }
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bool knob_dragging() const { return m_dragging; }
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Rect knob_rect() const;
Rect inner_rect() const
{
if (orientation() == Orientation::Horizontal)
return rect().shrunken(20, 0);
return rect().shrunken(0, 20);
}
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Function<void(int)> on_value_changed;
protected:
explicit GSlider(GWidget*);
explicit GSlider(Orientation, GWidget*);
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virtual void paint_event(GPaintEvent&) override;
virtual void mousedown_event(GMouseEvent&) override;
virtual void mousemove_event(GMouseEvent&) override;
virtual void mouseup_event(GMouseEvent&) override;
virtual void leave_event(CEvent&) override;
virtual void change_event(GEvent&) override;
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private:
void set_knob_hovered(bool);
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int m_value { 0 };
int m_min { 0 };
int m_max { 100 };
bool m_knob_hovered { false };
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bool m_dragging { false };
int m_drag_origin_value { 0 };
Point m_drag_origin;
KnobSizeMode m_knob_size_mode { KnobSizeMode::Fixed };
Orientation m_orientation { Orientation::Horizontal };
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};