mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-10 13:00:29 +03:00
d938b9effe
Renames on_automatic_scrolling_timer_fired() =>
automatic_scrolling_timer_did_fire()
The 'on_' prefix is usually reserved for AK::Function hooks.
Renames set_automatic_scrolling_{active,timer}() =>
set_automatic_scrolling_timer_active()
For consistency, accuracy, and header file A E S T H E T I C S
110 lines
3.8 KiB
C++
110 lines
3.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, the SerenityOS developers.
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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 <LibCore/Timer.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 = default;
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bool is_scrollable() const { return max() != min(); }
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bool has_scrubber() const;
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enum class Animation {
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SmoothScroll,
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CoarseScroll
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};
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void set_scroll_animation(Animation scroll_animation);
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virtual void set_value(int, AllowCallback = AllowCallback::Yes, DoClamp = DoClamp::Yes) override;
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void set_target_value(int);
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virtual void increase_slider_by(int delta) override { set_target_value(m_target_value + delta); }
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virtual void decrease_slider_by(int delta) override { set_target_value(m_target_value - delta); }
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virtual void increase_slider_by_page_steps(int page_steps) override { set_target_value(m_target_value + page_step() * page_steps); }
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virtual void decrease_slider_by_page_steps(int page_steps) override { set_target_value(m_target_value - page_step() * page_steps); }
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virtual void increase_slider_by_steps(int steps) override { set_target_value(m_target_value + step() * steps); }
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virtual void decrease_slider_by_steps(int steps) override { set_target_value(m_target_value - step() * steps); }
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virtual Optional<UISize> calculated_min_size() const override;
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virtual Optional<UISize> calculated_preferred_size() const override;
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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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enum class GutterClickState {
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NotPressed,
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BeforeScrubber,
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AfterScrubber,
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} m_gutter_click_state { GutterClickState::NotPressed };
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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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float 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 automatic_scrolling_timer_did_fire();
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void set_automatic_scrolling_timer_active(bool, Component);
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void scroll_to_position(Gfx::IntPoint);
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void scroll_by_page(Gfx::IntPoint);
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Component component_at_position(Gfx::IntPoint);
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void update_animated_scroll();
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Animation m_scroll_animation { Animation::SmoothScroll };
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int m_target_value { 0 };
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int m_start_value { 0 };
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double m_animation_time_elapsed { 0 };
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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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RefPtr<Core::Timer> m_animated_scrolling_timer;
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};
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}
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