Slider.hpp

 
//
// TGUI - Texus' Graphical User Interface
// Copyright (C) 2012-2022 Bruno Van de Velde (vdv_b@tgui.eu)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
 
 
#ifndef TGUI_SLIDER_HPP
#define TGUI_SLIDER_HPP
 
 
#include <TGUI/Widget.hpp>
#include <TGUI/Renderers/SliderRenderer.hpp>
 
 
namespace tgui
{
    class TGUI_API Slider : public Widget
    {
    public:
 
        typedef std::shared_ptr<Slider> Ptr; 
        typedef std::shared_ptr<const Slider> ConstPtr; 
 
 
        Slider(const char* typeName = "Slider", bool initRenderer = true);
 
 
        static Slider::Ptr create(float minimum = 0, float maximum = 10);
 
 
        static Slider::Ptr copy(Slider::ConstPtr slider);
 
 
        SliderRenderer* getSharedRenderer();
        const SliderRenderer* getSharedRenderer() const;
 
        SliderRenderer* getRenderer();
        const SliderRenderer* getRenderer() const;
 
 
        void setSize(const Layout2d& size) override;
        using Widget::setSize;
 
 
        Vector2f getFullSize() const override;
 
 
        Vector2f getWidgetOffset() const override;
 
 
        void setMinimum(float minimum);
 
 
        float getMinimum() const;
 
 
        void setMaximum(float maximum);
 
 
        float getMaximum() const;
 
 
        void setValue(float value);
 
 
        float getValue() const;
 
 
        void setStep(float step);
 
 
        float getStep() const;
 
 
        void setVerticalScroll(bool vertical);
 
 
        bool getVerticalScroll() const;
 
 
        void setInvertedDirection(bool invertedDirection);
 
 
        bool getInvertedDirection() const;
 
 
        void setChangeValueOnScroll(bool changeValueOnScroll);
 
 
        bool getChangeValueOnScroll() const;
 
 
        bool isMouseOnWidget(Vector2f pos) const override;
 
        void leftMousePressed(Vector2f pos) override;
 
        void leftMouseReleased(Vector2f pos) override;
 
        void mouseMoved(Vector2f pos) override;
 
        bool mouseWheelScrolled(float delta, Vector2f pos) override;
 
        void leftMouseButtonNoLongerDown() override;
 
 
        void draw(BackendRenderTargetBase& target, RenderStates states) const override;
 
 
    protected:
 
        Signal& getSignal(String signalName) override;
 
 
        void rendererChanged(const String& property) override;
 
 
        std::unique_ptr<DataIO::Node> save(SavingRenderersMap& renderers) const override;
 
 
        void load(const std::unique_ptr<DataIO::Node>& node, const LoadingRenderersMap& renderers) override;
 
 
        // Returns the size without the borders
        Vector2f getInnerSize() const;
 
 
        // Updates the position of the thumb based on the current value of the slider
        void updateThumbPosition();
 
 
        // Makes a copy of the widget
        Widget::Ptr clone() const override
        {
            return std::make_shared<Slider>(*this);
        }
 
 
    public:
 
        SignalFloat onValueChange = {"ValueChanged"}; 
 
 
    protected:
 
        FloatRect m_thumb;
 
        // When the mouse went down, did it go down on top of the thumb? If so, where?
        bool m_mouseDownOnThumb = false;
        Vector2f m_mouseDownOnThumbPos;
 
        float m_minimum = 0;
        float m_maximum = 10;
        float m_value = 0;
        float m_step = 1;
 
        bool m_invertedDirection = false; // Are min and max swapped?
        bool m_verticalScroll = false; // Is the slider drawn vertically?
        bool m_verticalImage = false; // Does the image lie vertically?
        bool m_changeValueOnScroll = true; // Does mouseScroll event change slider value?
 
        Sprite m_spriteTrack;
        Sprite m_spriteTrackHover;
        Sprite m_spriteThumb;
        Sprite m_spriteThumbHover;
 
        // Cached renderer properties
        Borders m_bordersCached;
        Color   m_borderColorCached;
        Color   m_borderColorHoverCached;
        Color   m_thumbColorCached;
        Color   m_thumbColorHoverCached;
        Color   m_trackColorCached;
        Color   m_trackColorHoverCached;
        bool    m_thumbWithinTrackCached = false;
    };
 
}
 
 
#endif // TGUI_SLIDER_HPP