mirror of
https://github.com/RGBCube/serenity
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ca538b6cee
You can now register a GWidget subclass with REGISTER_GWIDGET(class) and it will be available for factory construction through the new GWidgetClassRegistration interface. To obtain a GWidgetClassRegistration for a given class name, you call GWidgetClassRegistration::find(class_name). You can also iterate over all the registered classes using GWCR::for_each(callback). This will be very useful for implementing a proper GUI designer, and also in the future for things like script bindings. NOTE: All of the registrations are done in GWidget.cpp at the moment since I ran into trouble with the fricken linker pruning the global constructors this mechanism relies on. :^)
88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
#pragma once
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#include <AK/Function.h>
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#include <LibCore/CTimer.h>
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#include <LibGUI/GWidget.h>
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class GScrollBar final : public GWidget {
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C_OBJECT(GScrollBar)
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public:
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virtual ~GScrollBar() override;
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Orientation orientation() const { return m_orientation; }
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bool is_scrollable() const { return max() != min(); }
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int value() const { return m_value; }
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int min() const { return m_min; }
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int max() const { return m_max; }
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int step() const { return m_step; }
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int big_step() const { return m_big_step; }
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void set_min(int min) { set_range(min, max()); }
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void set_max(int max) { set_range(min(), max); }
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void set_range(int min, int max);
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void set_value(int value);
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void set_step(int step) { m_step = step; }
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void set_big_step(int big_step) { m_big_step = big_step; }
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bool has_scrubber() const;
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Function<void(int)> on_change;
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enum Component {
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Invalid,
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DecrementButton,
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IncrementButton,
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Gutter,
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Scrubber,
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};
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private:
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explicit GScrollBar(GWidget* parent);
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explicit GScrollBar(Orientation, GWidget* parent);
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virtual void paint_event(GPaintEvent&) override;
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virtual void mousedown_event(GMouseEvent&) override;
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virtual void mouseup_event(GMouseEvent&) override;
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virtual void mousemove_event(GMouseEvent&) override;
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virtual void mousewheel_event(GMouseEvent&) override;
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virtual void leave_event(CEvent&) override;
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virtual void change_event(GEvent&) override;
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int default_button_size() const { return 16; }
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int button_size() const { return length(orientation()) <= (default_button_size() * 2) ? length(orientation()) / 2 : default_button_size(); }
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int button_width() const { return orientation() == Orientation::Vertical ? width() : button_size(); }
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int button_height() const { return orientation() == Orientation::Horizontal ? height() : button_size(); }
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Rect decrement_button_rect() const;
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Rect increment_button_rect() const;
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Rect decrement_gutter_rect() const;
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Rect increment_gutter_rect() const;
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Rect scrubber_rect() const;
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int scrubber_size() const;
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int scrubbable_range_in_pixels() const;
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void on_automatic_scrolling_timer_fired();
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void set_automatic_scrolling_active(bool);
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int m_min { 0 };
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int m_max { 0 };
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int m_value { 0 };
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int m_step { 1 };
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int m_big_step { 5 };
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bool m_scrubbing { false };
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int m_scrub_start_value { 0 };
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Point m_scrub_origin;
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Orientation m_orientation { Orientation::Vertical };
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Component m_hovered_component { Component::Invalid };
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bool m_scrubber_in_use { false };
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enum class AutomaticScrollingDirection {
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None = 0,
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Decrement,
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Increment,
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};
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AutomaticScrollingDirection m_automatic_scrolling_direction { AutomaticScrollingDirection::None };
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RefPtr<CTimer> m_automatic_scrolling_timer;
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};
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