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a0cbb9068b
Route the ScrollBar's wheel event to the ScrollableWidget so it can handle it itself. This allows it to handle it consistently (e.g. speed) when the cursor is hovering the scroll bars rather than the widget's contents. Fixes #5419
95 lines
3.5 KiB
C++
95 lines
3.5 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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 decrement_gutter_rect() const;
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Gfx::IntRect increment_gutter_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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