Carla/source/modules/juce_gui_basics/drawables/juce_DrawableShape.cpp

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

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2017 - ROLI Ltd.

   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
{

DrawableShape::DrawableShape()
    : strokeType (0.0f),
      mainFill (Colours::black),
      strokeFill (Colours::black)
{
}

DrawableShape::DrawableShape (const DrawableShape& other)
    : Drawable (other),
      strokeType (other.strokeType),
      dashLengths (other.dashLengths),
      mainFill (other.mainFill),
      strokeFill (other.strokeFill)
{
}

DrawableShape::~DrawableShape()
{
}

//==============================================================================
void DrawableShape::setFill (const FillType& newFill)
{
    if (mainFill != newFill)
    {
        mainFill = newFill;
        repaint();
    }
}

void DrawableShape::setStrokeFill (const FillType& newFill)
{
    if (strokeFill != newFill)
    {
        strokeFill = newFill;
        repaint();
    }
}

void DrawableShape::setStrokeType (const PathStrokeType& newStrokeType)
{
    if (strokeType != newStrokeType)
    {
        strokeType = newStrokeType;
        strokeChanged();
    }
}

void DrawableShape::setDashLengths (const Array<float>& newDashLengths)
{
    if (dashLengths != newDashLengths)
    {
        dashLengths = newDashLengths;
        strokeChanged();
    }
}

void DrawableShape::setStrokeThickness (const float newThickness)
{
    setStrokeType (PathStrokeType (newThickness, strokeType.getJointStyle(), strokeType.getEndStyle()));
}

bool DrawableShape::isStrokeVisible() const noexcept
{
    return strokeType.getStrokeThickness() > 0.0f && ! strokeFill.isInvisible();
}

//==============================================================================
void DrawableShape::paint (Graphics& g)
{
    transformContextToCorrectOrigin (g);
    applyDrawableClipPath (g);

    g.setFillType (mainFill);
    g.fillPath (path);

    if (isStrokeVisible())
    {
        g.setFillType (strokeFill);
        g.fillPath (strokePath);
    }
}

void DrawableShape::pathChanged()
{
    strokeChanged();
}

void DrawableShape::strokeChanged()
{
    strokePath.clear();
    const float extraAccuracy = 4.0f;

    if (dashLengths.isEmpty())
        strokeType.createStrokedPath (strokePath, path, AffineTransform(), extraAccuracy);
    else
        strokeType.createDashedStroke (strokePath, path, dashLengths.getRawDataPointer(),
                                       dashLengths.size(), AffineTransform(), extraAccuracy);

    setBoundsToEnclose (getDrawableBounds());
    repaint();
}

Rectangle<float> DrawableShape::getDrawableBounds() const
{
    if (isStrokeVisible())
        return strokePath.getBounds();

    return path.getBounds();
}

bool DrawableShape::hitTest (int x, int y)
{
    bool allowsClicksOnThisComponent, allowsClicksOnChildComponents;
    getInterceptsMouseClicks (allowsClicksOnThisComponent, allowsClicksOnChildComponents);

    if (! allowsClicksOnThisComponent)
        return false;

    auto globalX = (float) (x - originRelativeToComponent.x);
    auto globalY = (float) (y - originRelativeToComponent.y);

    return path.contains (globalX, globalY)
            || (isStrokeVisible() && strokePath.contains (globalX, globalY));
}

//==============================================================================
static bool replaceColourInFill (FillType& fill, Colour original, Colour replacement)
{
    if (fill.colour == original && fill.isColour())
    {
        fill = FillType (replacement);
        return true;
    }

    return false;
}

bool DrawableShape::replaceColour (Colour original, Colour replacement)
{
    bool changed1 = replaceColourInFill (mainFill,   original, replacement);
    bool changed2 = replaceColourInFill (strokeFill, original, replacement);
    return changed1 || changed2;
}

Path DrawableShape::getOutlineAsPath() const
{
    auto outline = isStrokeVisible() ? strokePath : path;
    outline.applyTransform (getTransform());
    return outline;
}

} // namespace juce