mirror of
https://github.com/RGBCube/serenity
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72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Function.h>
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#include <LibGUI/AbstractSlider.h>
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namespace GUI {
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class Scrollbar : public AbstractSlider {
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C_OBJECT(Scrollbar);
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public:
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virtual ~Scrollbar() override;
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bool is_scrollable() const { return max() != min(); }
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bool has_scrubber() const;
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enum Component {
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None,
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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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protected:
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explicit Scrollbar(Gfx::Orientation = Gfx::Orientation::Vertical);
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virtual void paint_event(PaintEvent&) override;
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virtual void mousedown_event(MouseEvent&) override;
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virtual void mouseup_event(MouseEvent&) override;
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virtual void mousemove_event(MouseEvent&) override;
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virtual void mousewheel_event(MouseEvent&) override;
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virtual void leave_event(Core::Event&) override;
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virtual void change_event(Event&) override;
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private:
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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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Gfx::IntRect decrement_button_rect() const;
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Gfx::IntRect increment_button_rect() const;
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Gfx::IntRect scrubber_rect() const;
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int unclamped_scrubber_size() const;
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int visible_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, Component);
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void scroll_to_position(const Gfx::IntPoint&);
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void scroll_by_page(const Gfx::IntPoint&);
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Component component_at_position(const Gfx::IntPoint&);
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int m_scrub_start_value { 0 };
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Gfx::IntPoint m_scrub_origin;
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Component m_hovered_component { Component::None };
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Component m_pressed_component { Component::None };
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Gfx::IntPoint m_last_mouse_position;
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RefPtr<Core::Timer> m_automatic_scrolling_timer;
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};
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}
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