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138 lines
5.1 KiB
138 lines
5.1 KiB
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2013 - Raw Material Software Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found at: www.gnu.org/licenses
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.juce.com for more information.
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==============================================================================
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*/
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#ifndef JUCE_DRAWABLEIMAGE_H_INCLUDED
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#define JUCE_DRAWABLEIMAGE_H_INCLUDED
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//==============================================================================
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/**
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A drawable object which is a bitmap image.
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@see Drawable
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*/
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class JUCE_API DrawableImage : public Drawable
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{
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public:
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//==============================================================================
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DrawableImage();
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DrawableImage (const DrawableImage&);
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/** Destructor. */
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~DrawableImage();
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//==============================================================================
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/** Sets the image that this drawable will render. */
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void setImage (const Image& imageToUse);
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/** Returns the current image. */
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const Image& getImage() const noexcept { return image; }
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/** Sets the opacity to use when drawing the image. */
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void setOpacity (float newOpacity);
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/** Returns the image's opacity. */
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float getOpacity() const noexcept { return opacity; }
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/** Sets a colour to draw over the image's alpha channel.
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By default this is transparent so isn't drawn, but if you set a non-transparent
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colour here, then it will be overlaid on the image, using the image's alpha
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channel as a mask.
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This is handy for doing things like darkening or lightening an image by overlaying
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it with semi-transparent black or white.
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*/
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void setOverlayColour (Colour newOverlayColour);
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/** Returns the overlay colour. */
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Colour getOverlayColour() const noexcept { return overlayColour; }
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/** Sets the bounding box within which the image should be displayed. */
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void setBoundingBox (const RelativeParallelogram& newBounds);
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/** Returns the position to which the image's top-left corner should be remapped in the target
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coordinate space when rendering this object.
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@see setTransform
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*/
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const RelativeParallelogram& getBoundingBox() const noexcept { return bounds; }
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//==============================================================================
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/** @internal */
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void paint (Graphics&) override;
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/** @internal */
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bool hitTest (int x, int y) override;
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/** @internal */
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Drawable* createCopy() const override;
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/** @internal */
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Rectangle<float> getDrawableBounds() const override;
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/** @internal */
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void refreshFromValueTree (const ValueTree& tree, ComponentBuilder&);
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/** @internal */
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ValueTree createValueTree (ComponentBuilder::ImageProvider*) const override;
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/** @internal */
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static const Identifier valueTreeType;
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//==============================================================================
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/** Internally-used class for wrapping a DrawableImage's state into a ValueTree. */
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class ValueTreeWrapper : public Drawable::ValueTreeWrapperBase
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{
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public:
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ValueTreeWrapper (const ValueTree& state);
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var getImageIdentifier() const;
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void setImageIdentifier (const var&, UndoManager*);
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Value getImageIdentifierValue (UndoManager*);
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float getOpacity() const;
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void setOpacity (float newOpacity, UndoManager*);
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Value getOpacityValue (UndoManager*);
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Colour getOverlayColour() const;
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void setOverlayColour (Colour newColour, UndoManager*);
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Value getOverlayColourValue (UndoManager*);
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RelativeParallelogram getBoundingBox() const;
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void setBoundingBox (const RelativeParallelogram&, UndoManager*);
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static const Identifier opacity, overlay, image, topLeft, topRight, bottomLeft;
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};
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private:
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//==============================================================================
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Image image;
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float opacity;
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Colour overlayColour;
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RelativeParallelogram bounds;
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friend class Drawable::Positioner<DrawableImage>;
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bool registerCoordinates (RelativeCoordinatePositionerBase&);
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void recalculateCoordinates (Expression::Scope*);
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DrawableImage& operator= (const DrawableImage&);
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JUCE_LEAK_DETECTOR (DrawableImage)
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};
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#endif // JUCE_DRAWABLEIMAGE_H_INCLUDED
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