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dab7ec190e
Implement, and use internally, content_margins() from Widget. Since AbstractScrollableWidget already has a method called content_size, the convenience method, with the same name, in Widget has to be explicitly called.
119 lines
4.3 KiB
C++
119 lines
4.3 KiB
C++
/*
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* Copyright (c) 2018-2021, 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 <LibGUI/Frame.h>
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#include <LibGUI/Scrollbar.h>
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namespace GUI {
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class AbstractScrollableWidget : public Frame {
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C_OBJECT_ABSTRACT(AbstractScrollableWidget);
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public:
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virtual ~AbstractScrollableWidget() override;
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Gfx::IntSize content_size() const { return m_content_size; }
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int content_width() const { return m_content_size.width(); }
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int content_height() const { return m_content_size.height(); }
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Gfx::IntRect visible_content_rect() const;
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Gfx::IntRect widget_inner_rect() const;
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Gfx::IntRect viewport_rect_in_content_coordinates() const
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{
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auto viewport_rect = visible_content_rect();
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viewport_rect.set_size(widget_inner_rect().size());
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return viewport_rect;
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}
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void scroll_into_view(const Gfx::IntRect&, Orientation);
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void scroll_into_view(const Gfx::IntRect&, bool scroll_horizontally, bool scroll_vertically);
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void set_scrollbars_enabled(bool);
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bool is_scrollbars_enabled() const { return m_scrollbars_enabled; }
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Gfx::IntSize available_size() const;
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Gfx::IntSize excess_size() const;
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Scrollbar& vertical_scrollbar() { return *m_vertical_scrollbar; }
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const Scrollbar& vertical_scrollbar() const { return *m_vertical_scrollbar; }
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Scrollbar& horizontal_scrollbar() { return *m_horizontal_scrollbar; }
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const Scrollbar& horizontal_scrollbar() const { return *m_horizontal_scrollbar; }
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Widget& corner_widget() { return *m_corner_widget; }
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const Widget& corner_widget() const { return *m_corner_widget; }
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void scroll_to_top();
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void scroll_to_bottom();
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void set_automatic_scrolling_timer(bool active);
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virtual Gfx::IntPoint automatic_scroll_delta_from_position(const Gfx::IntPoint&) const;
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int width_occupied_by_vertical_scrollbar() const;
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int height_occupied_by_horizontal_scrollbar() const;
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virtual Margins content_margins() const override;
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void set_should_hide_unnecessary_scrollbars(bool b) { m_should_hide_unnecessary_scrollbars = b; }
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bool should_hide_unnecessary_scrollbars() const { return m_should_hide_unnecessary_scrollbars; }
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Gfx::IntPoint to_content_position(const Gfx::IntPoint& widget_position) const;
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Gfx::IntPoint to_widget_position(const Gfx::IntPoint& content_position) const;
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Gfx::IntRect to_content_rect(const Gfx::IntRect& widget_rect) const { return { to_content_position(widget_rect.location()), widget_rect.size() }; }
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Gfx::IntRect to_widget_rect(const Gfx::IntRect& content_rect) const { return { to_widget_position(content_rect.location()), content_rect.size() }; }
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protected:
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AbstractScrollableWidget();
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virtual void custom_layout() override;
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virtual void resize_event(ResizeEvent&) override;
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virtual void mousewheel_event(MouseEvent&) override;
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virtual void did_scroll() { }
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void set_content_size(const Gfx::IntSize&);
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void set_size_occupied_by_fixed_elements(const Gfx::IntSize&);
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virtual void on_automatic_scrolling_timer_fired() {};
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int autoscroll_threshold() const { return m_autoscroll_threshold; }
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private:
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class AbstractScrollableWidgetScrollbar final : public Scrollbar {
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C_OBJECT(AbstractScrollableWidgetScrollbar);
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private:
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explicit AbstractScrollableWidgetScrollbar(AbstractScrollableWidget& owner, Gfx::Orientation orientation)
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: Scrollbar(orientation)
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, m_owner(owner)
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{
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}
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virtual void mousewheel_event(MouseEvent& event) override
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{
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m_owner.handle_wheel_event(event, *this);
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}
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AbstractScrollableWidget& m_owner;
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};
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friend class ScrollableWidgetScrollbar;
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void update_scrollbar_ranges();
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void handle_wheel_event(MouseEvent&, Widget&);
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RefPtr<AbstractScrollableWidgetScrollbar> m_vertical_scrollbar;
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RefPtr<AbstractScrollableWidgetScrollbar> m_horizontal_scrollbar;
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RefPtr<Widget> m_corner_widget;
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Gfx::IntSize m_content_size;
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Gfx::IntSize m_size_occupied_by_fixed_elements;
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bool m_scrollbars_enabled { true };
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bool m_should_hide_unnecessary_scrollbars { false };
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RefPtr<Core::Timer> m_automatic_scrolling_timer;
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bool m_active_scrolling_enabled { false };
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int m_autoscroll_threshold { 20 };
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};
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}
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