JUCE/modules/juce_gui_basics/drawables/juce_DrawableComposite.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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   framework to you, and you must discontinue the installation or download
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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
{

DrawableComposite::DrawableComposite()
    : bounds ({ 0.0f, 0.0f, 100.0f, 100.0f })
{
    setContentArea ({ 0.0f, 0.0f, 100.0f, 100.0f });
}

DrawableComposite::DrawableComposite (const DrawableComposite& other)
    : Drawable (other),
      bounds (other.bounds),
      contentArea (other.contentArea)
{
    for (auto* c : other.getChildren())
        if (auto* d = dynamic_cast<const Drawable*> (c))
            addAndMakeVisible (d->createCopy().release());
}

DrawableComposite::~DrawableComposite()
{
    deleteAllChildren();
}

std::unique_ptr<Drawable> DrawableComposite::createCopy() const
{
    return std::make_unique<DrawableComposite> (*this);
}

//==============================================================================
Rectangle<float> DrawableComposite::getDrawableBounds() const
{
    Rectangle<float> r;

    for (auto* c : getChildren())
        if (auto* d = dynamic_cast<const Drawable*> (c))
            r = r.getUnion (d->isTransformed() ? d->getDrawableBounds().transformedBy (d->getTransform())
                                               : d->getDrawableBounds());

    return r;
}

void DrawableComposite::setContentArea (Rectangle<float> newArea)
{
    contentArea = newArea;
}

void DrawableComposite::setBoundingBox (Rectangle<float> newBounds)
{
    setBoundingBox (Parallelogram<float> (newBounds));
}

void DrawableComposite::setBoundingBox (Parallelogram<float> newBounds)
{
    if (bounds != newBounds)
    {
        bounds = newBounds;

        auto t = AffineTransform::fromTargetPoints (contentArea.getTopLeft(),     bounds.topLeft,
                                                    contentArea.getTopRight(),    bounds.topRight,
                                                    contentArea.getBottomLeft(),  bounds.bottomLeft);

        if (t.isSingularity())
            t = {};

        setTransform (t);
    }
}

void DrawableComposite::resetBoundingBoxToContentArea()
{
    setBoundingBox (contentArea);
}

void DrawableComposite::resetContentAreaAndBoundingBoxToFitChildren()
{
    setContentArea (getDrawableBounds());
    resetBoundingBoxToContentArea();
}

void DrawableComposite::parentHierarchyChanged()
{
    if (auto* parent = getParent())
        originRelativeToComponent = parent->originRelativeToComponent - getPosition();
}

void DrawableComposite::childBoundsChanged (Component*)
{
    updateBoundsToFitChildren();
}

void DrawableComposite::childrenChanged()
{
    updateBoundsToFitChildren();
}

void DrawableComposite::updateBoundsToFitChildren()
{
    if (! updateBoundsReentrant)
    {
        const ScopedValueSetter<bool> setter (updateBoundsReentrant, true, false);

        Rectangle<int> childArea;

        for (auto* c : getChildren())
            childArea = childArea.getUnion (c->getBoundsInParent());

        auto delta = childArea.getPosition();
        childArea += getPosition();

        if (childArea != getBounds())
        {
            if (! delta.isOrigin())
            {
                originRelativeToComponent -= delta;

                for (auto* c : getChildren())
                    c->setBounds (c->getBounds() - delta);
            }

            setBounds (childArea);
        }
    }
}

//==============================================================================
Path DrawableComposite::getOutlineAsPath() const
{
    Path p;

    for (auto* c : getChildren())
        if (auto* d = dynamic_cast<Drawable*> (c))
            p.addPath (d->getOutlineAsPath());

    p.applyTransform (getTransform());
    return p;
}

} // namespace juce