JUCE/modules/juce_gui_basics/drawables/juce_Drawable.cpp

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

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   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
{

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

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

    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;

    auto newBounds = area.getSmallestIntegerContainer() + parentOrigin;
    originRelativeToComponent = parentOrigin - newBounds.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::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)
{
    std::unique_ptr<Drawable> result;

    auto image = ImageFileFormat::loadFrom (data, numBytes);

    if (image.isValid())
    {
        auto* di = new DrawableImage();
        di->setImage (image);
        result.reset (di);
    }
    else
    {
        if (auto svg = parseXMLIfTagMatches (String::createStringFromData (data, (int) numBytes), "svg"))
            result = Drawable::createFromSVG (*svg);
    }

    return result;
}

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