#pragma once #include #include #include class GScrollBar final : public GWidget { C_OBJECT(GScrollBar) public: explicit GScrollBar(Orientation, GWidget* parent); virtual ~GScrollBar() override; Orientation orientation() const { return m_orientation; } bool is_scrollable() const { return max() != min(); } 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 on_change; 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 mousewheel_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 }; bool m_scrubber_in_use { false }; enum class AutomaticScrollingDirection { None = 0, Decrement, Increment, }; AutomaticScrollingDirection m_automatic_scrolling_direction { AutomaticScrollingDirection::None }; CTimer m_automatic_scrolling_timer; };