JUCE/modules/juce_gui_basics/drawables/juce_Drawable.cpp

/*
  ==============================================================================

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

   By downloading, installing, or using the JUCE framework, or combining the
   JUCE framework with any other source code, object code, content or any other
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   do not agree to the terms of these agreements, we will not license the JUCE
   framework to you, and you must discontinue the installation or download
   process and cease use of the JUCE framework.

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   Or:

   You may also use this code under the terms of the AGPLv3:
   https://www.gnu.org/licenses/agpl-3.0.en.html

   THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
   WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

Drawable::Drawable()
{
    setInterceptsMouseClicks (false, false);
    setPaintingIsUnclipped (true);
    setAccessible (false);
}

Drawable::Drawable (const Drawable& other)
    : Component (other.getName())
{
    setInterceptsMouseClicks (false, false);
    setPaintingIsUnclipped (true);
    setAccessible (false);

    setComponentID (other.getComponentID());
    setTransform (other.getTransform());

    if (auto* clipPath = other.drawableClipPath.get())
        setClipPath (clipPath->createCopy());
}

Drawable::~Drawable()
{
}

void Drawable::applyDrawableClipPath (Graphics& g)
{
    if (drawableClipPath != nullptr)
    {
        auto clipPath = drawableClipPath->getOutlineAsPath();

        if (! clipPath.isEmpty())
            g.getInternalContext().clipToPath (clipPath, {});
    }
}

//==============================================================================
void Drawable::draw (Graphics& g, float opacity, const AffineTransform& transform) const
{
    const_cast<Drawable*> (this)->nonConstDraw (g, opacity, transform);
}

void Drawable::nonConstDraw (Graphics& g, float opacity, const AffineTransform& transform)
{
    Graphics::ScopedSaveState ss (g);

    g.addTransform (AffineTransform::translation ((float) -(originRelativeToComponent.x),
                                                  (float) -(originRelativeToComponent.y))
                        .followedBy (getTransform())
                        .followedBy (transform));

    applyDrawableClipPath (g);

    if (! g.isClipEmpty())
    {
        if (opacity < 1.0f)
        {
            g.beginTransparencyLayer (opacity);
            paintEntireComponent (g, true);
            g.endTransparencyLayer();
        }
        else
        {
            paintEntireComponent (g, true);
        }
    }
}

void Drawable::drawAt (Graphics& g, float x, float y, float opacity) const
{
    draw (g, opacity, AffineTransform::translation (x, y));
}

void Drawable::drawWithin (Graphics& g, Rectangle<float> destArea,
                           RectanglePlacement placement, float opacity) const
{
    draw (g, opacity, placement.getTransformToFit (getDrawableBounds(), destArea));
}

//==============================================================================
DrawableComposite* Drawable::getParent() const
{
    return dynamic_cast<DrawableComposite*> (getParentComponent());
}

void Drawable::setClipPath (std::unique_ptr<Drawable> clipPath)
{
    if (drawableClipPath != clipPath)
    {
        drawableClipPath = std::move (clipPath);
        repaint();
    }
}

void Drawable::transformContextToCorrectOrigin (Graphics& g)
{
    g.setOrigin (originRelativeToComponent);
}

void Drawable::parentHierarchyChanged()
{
    setBoundsToEnclose (getDrawableBounds());
}

void Drawable::setBoundsToEnclose (Rectangle<float> area)
{
    Point<int> parentOrigin;

    if (auto* parent = getParent())
        parentOrigin = parent->originRelativeToComponent;

    const auto smallestIntegerContainer = area.getSmallestIntegerContainer();
    auto newBounds = smallestIntegerContainer + parentOrigin;
    originRelativeToComponent = -smallestIntegerContainer.getPosition();
    setBounds (newBounds);
}

//==============================================================================
bool Drawable::replaceColour (Colour original, Colour replacement)
{
    bool changed = false;

    for (auto* c : getChildren())
        if (auto* d = dynamic_cast<Drawable*> (c))
            changed = d->replaceColour (original, replacement) || changed;

    return changed;
}

void Drawable::setDrawableTransform (const AffineTransform& transform)
{
    drawableTransform = transform;
    updateTransform();
}

void Drawable::updateTransform()
{
    if (drawableTransform.isIdentity())
        return;

    const auto transformationOrigin = originRelativeToComponent + getPosition();
    setTransform (AffineTransform::translation (transformationOrigin * (-1))
                      .followedBy (drawableTransform)
                      .followedBy (AffineTransform::translation (transformationOrigin)));
}

//==============================================================================
void Drawable::setOriginWithOriginalSize (Point<float> originWithinParent)
{
    setTransform (AffineTransform::translation (originWithinParent.x, originWithinParent.y));
}

void Drawable::setTransformToFit (const Rectangle<float>& area, RectanglePlacement placement)
{
    if (! area.isEmpty())
        setTransform (placement.getTransformToFit (getDrawableBounds(), area));
}

//==============================================================================
std::unique_ptr<Drawable> Drawable::createFromImageData (const void* data, const size_t numBytes)
{
    auto image = ImageFileFormat::loadFrom (data, numBytes);

    if (image.isValid())
        return std::make_unique<DrawableImage> (image);

    if (auto svg = parseXMLIfTagMatches (String::createStringFromData (data, (int) numBytes), "svg"))
        return Drawable::createFromSVG (*svg);

    return {};
}

std::unique_ptr<Drawable> Drawable::createFromImageDataStream (InputStream& dataSource)
{
    MemoryOutputStream mo;
    mo << dataSource;

    return createFromImageData (mo.getData(), mo.getDataSize());
}

std::unique_ptr<Drawable> Drawable::createFromImageFile (const File& file)
{
    FileInputStream fin (file);

    if (fin.openedOk())
        return createFromImageDataStream (fin);

    return {};
}

} // namespace juce