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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <LibGUI/Widget.h>
namespace GUI {
class Slider : public Widget {
C_OBJECT(Slider)
public:
enum class KnobSizeMode {
Fixed,
Proportional,
};
virtual ~Slider() override;
Orientation orientation() const { return m_orientation; }
int value() const { return m_value; }
int min() const { return m_min; }
int max() const { return m_max; }
int step() const { return m_step; }
void set_range(int min, int max);
void set_value(int);
void set_min(int min) { set_range(min, max()); }
void set_max(int max) { set_range(min(), max); }
void set_step(int step) { m_step = step; }
void set_knob_size_mode(KnobSizeMode mode) { m_knob_size_mode = mode; }
KnobSizeMode knob_size_mode() const { return m_knob_size_mode; }
int track_size() const { return 2; }
int knob_fixed_primary_size() const { return 8; }
int knob_secondary_size() const { return 20; }
bool knob_dragging() const { return m_dragging; }
Gfx::Rect knob_rect() const;
Gfx::Rect inner_rect() const
{
if (orientation() == Orientation::Horizontal)
return rect().shrunken(20, 0);
return rect().shrunken(0, 20);
}
Function<void(int)> on_value_changed;
protected:
explicit Slider(Widget* = nullptr);
explicit Slider(Orientation, Widget* = nullptr);
virtual void paint_event(PaintEvent&) override;
virtual void mousedown_event(MouseEvent&) override;
virtual void mousemove_event(MouseEvent&) override;
virtual void mouseup_event(MouseEvent&) override;
virtual void mousewheel_event(MouseEvent&) override;
virtual void leave_event(Core::Event&) override;
virtual void change_event(Event&) override;
private:
void set_knob_hovered(bool);
int m_value { 0 };
int m_min { 0 };
int m_max { 100 };
int m_step { 1 };
bool m_knob_hovered { false };
bool m_dragging { false };
int m_drag_origin_value { 0 };
Gfx::Point m_drag_origin;
KnobSizeMode m_knob_size_mode { KnobSizeMode::Fixed };
Orientation m_orientation { Orientation::Horizontal };
};
class VerticalSlider final : public Slider {
C_OBJECT(VerticalSlider)
public:
virtual ~VerticalSlider() override {}
private:
explicit VerticalSlider(Widget* parent = nullptr)
: Slider(Orientation::Vertical, parent)
{
}
};
class HorizontalSlider final : public Slider {
C_OBJECT(HorizontalSlider)
public:
virtual ~HorizontalSlider() override {}
private:
explicit HorizontalSlider(Widget* parent = nullptr)
: Slider(Orientation::Horizontal, parent)
{
}
};
}
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