mirror of
https://github.com/RGBCube/serenity
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94ca55cefd
As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
114 lines
4.2 KiB
C++
114 lines
4.2 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 <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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