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#pragma once
#include <AK/Function.h>
#include <LibCore/CTimer.h>
#include <LibGUI/GWidget.h>
class GScrollBar final : public GWidget {
public:
explicit GScrollBar(Orientation, GWidget* parent);
virtual ~GScrollBar() override;
Orientation orientation() const { return m_orientation; }
int value() const { return m_value; }
int min() const { return m_min; }
int max() const { return m_max; }
int step() const { return m_step; }
int big_step() const { return m_big_step; }
void set_min(int min) { set_range(min, max()); }
void set_max(int max) { set_range(min(), max); }
void set_range(int min, int max);
void set_value(int value);
void set_step(int step) { m_step = step; }
void set_big_step(int big_step) { m_big_step = big_step; }
bool has_scrubber() const;
Function<void(int)> on_change;
virtual const char* class_name() const override { return "GScrollBar"; }
enum Component {
Invalid,
DecrementButton,
IncrementButton,
Gutter,
Scrubber,
};
private:
virtual void paint_event(GPaintEvent&) override;
virtual void mousedown_event(GMouseEvent&) override;
virtual void mouseup_event(GMouseEvent&) override;
virtual void mousemove_event(GMouseEvent&) override;
virtual void leave_event(CEvent&) override;
virtual void change_event(GEvent&) override;
int default_button_size() const { return 16; }
int button_size() const { return length(orientation()) <= (default_button_size() * 2) ? length(orientation()) / 2 : default_button_size(); }
int button_width() const { return orientation() == Orientation::Vertical ? width() : button_size(); }
int button_height() const { return orientation() == Orientation::Horizontal ? height() : button_size(); }
Rect decrement_button_rect() const;
Rect increment_button_rect() const;
Rect decrement_gutter_rect() const;
Rect increment_gutter_rect() const;
Rect scrubber_rect() const;
int scrubber_size() const;
int scrubbable_range_in_pixels() const;
void on_automatic_scrolling_timer_fired();
void set_automatic_scrolling_active(bool);
int m_min { 0 };
int m_max { 0 };
int m_value { 0 };
int m_step { 1 };
int m_big_step { 5 };
bool m_scrubbing { false };
int m_scrub_start_value { 0 };
Point m_scrub_origin;
Orientation m_orientation { Orientation::Vertical };
Component m_hovered_component { Component::Invalid };
enum class AutomaticScrollingDirection {
None = 0,
Decrement,
Increment,
};
AutomaticScrollingDirection m_automatic_scrolling_direction { AutomaticScrollingDirection::None };
CTimer m_automatic_scrolling_timer;
};
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