juce_ImageButton.h

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/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
   JUCE is an open source library subject to commercial or open-source
   licensing.
 
   By using JUCE, you agree to the terms of both the JUCE 7 End-User License
   Agreement and JUCE Privacy Policy.
 
   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-privacy-policy
 
   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).
 
   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.
 
  ==============================================================================
*/
 
namespace juce
{
 
//==============================================================================
class JUCE_API  ImageButton  : public Button
{
public:
    //==============================================================================
    explicit ImageButton (const String& name = String());

    ~ImageButton() override;
 
    //==============================================================================
    void setImages (bool resizeButtonNowToFitThisImage,
                    bool rescaleImagesWhenButtonSizeChanges,
                    bool preserveImageProportions,
                    const Image& normalImage,
                    float imageOpacityWhenNormal,
                    Colour overlayColourWhenNormal,
                    const Image& overImage,
                    float imageOpacityWhenOver,
                    Colour overlayColourWhenOver,
                    const Image& downImage,
                    float imageOpacityWhenDown,
                    Colour overlayColourWhenDown,
                    float hitTestAlphaThreshold = 0.0f);

    Image getNormalImage() const;

    Image getOverImage() const;

    Image getDownImage() const;
 
    //==============================================================================
    struct JUCE_API  LookAndFeelMethods
    {
        virtual ~LookAndFeelMethods() = default;
 
        virtual void drawImageButton (Graphics&, Image*,
                                      int imageX, int imageY, int imageW, int imageH,
                                      const Colour& overlayColour, float imageOpacity, ImageButton&) = 0;
    };
 
protected:
    //==============================================================================
    bool hitTest (int x, int y) override;
    void paintButton (Graphics&, bool, bool) override;
 
private:
    //==============================================================================
    bool scaleImageToFit, preserveProportions;
    uint8 alphaThreshold;
    Rectangle<int> imageBounds;
    Image normalImage, overImage, downImage;
    float normalOpacity, overOpacity, downOpacity;
    Colour normalOverlay, overOverlay, downOverlay;
 
    Image getCurrentImage() const;
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ImageButton)
};
 
} // namespace juce