juce_RelativePointPath.h

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/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2015 - ROLI Ltd.
 
   Permission is granted to use this software under the terms of either:
   a) the GPL v2 (or any later version)
   b) the Affero GPL v3
 
   Details of these licenses can be found at: www.gnu.org/licenses
 
   JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 
   ------------------------------------------------------------------------------
 
   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.juce.com for more information.
 
  ==============================================================================
*/
 
#ifndef JUCE_RELATIVEPOINTPATH_H_INCLUDED
#define JUCE_RELATIVEPOINTPATH_H_INCLUDED
 
 
//==============================================================================
class JUCE_API  RelativePointPath
{
public:
    //==============================================================================
    RelativePointPath();
    RelativePointPath (const RelativePointPath&);
    explicit RelativePointPath (const Path& path);
    ~RelativePointPath();
 
    bool operator== (const RelativePointPath&) const noexcept;
    bool operator!= (const RelativePointPath&) const noexcept;
 
    //==============================================================================
    void createPath (Path& path, Expression::Scope* scope) const;
 
    bool containsAnyDynamicPoints() const;
 
    void swapWith (RelativePointPath&) noexcept;
 
    //==============================================================================
    enum ElementType
    {
        nullElement,
        startSubPathElement,
        closeSubPathElement,
        lineToElement,
        quadraticToElement,
        cubicToElement
    };
 
    //==============================================================================
    class JUCE_API  ElementBase
    {
    public:
        ElementBase (ElementType type);
        virtual ~ElementBase() {}
        virtual ValueTree createTree() const = 0;
        virtual void addToPath (Path& path, Expression::Scope*) const = 0;
        virtual RelativePoint* getControlPoints (int& numPoints) = 0;
        virtual ElementBase* clone() const = 0;
        bool isDynamic();
 
        const ElementType type;
 
    private:
        JUCE_DECLARE_NON_COPYABLE (ElementBase)
    };
 
    //==============================================================================
    class JUCE_API  StartSubPath  : public ElementBase
    {
    public:
        StartSubPath (const RelativePoint& pos);
        ValueTree createTree() const;
        void addToPath (Path& path, Expression::Scope*) const;
        RelativePoint* getControlPoints (int& numPoints);
        ElementBase* clone() const;
 
        RelativePoint startPos;
 
    private:
        JUCE_DECLARE_NON_COPYABLE (StartSubPath)
    };
 
    //==============================================================================
    class JUCE_API  CloseSubPath  : public ElementBase
    {
    public:
        CloseSubPath();
        ValueTree createTree() const;
        void addToPath (Path& path, Expression::Scope*) const;
        RelativePoint* getControlPoints (int& numPoints);
        ElementBase* clone() const;
 
    private:
        JUCE_DECLARE_NON_COPYABLE (CloseSubPath)
    };
 
    //==============================================================================
    class JUCE_API  LineTo  : public ElementBase
    {
    public:
        LineTo (const RelativePoint& endPoint);
        ValueTree createTree() const;
        void addToPath (Path& path, Expression::Scope*) const;
        RelativePoint* getControlPoints (int& numPoints);
        ElementBase* clone() const;
 
        RelativePoint endPoint;
 
    private:
        JUCE_DECLARE_NON_COPYABLE (LineTo)
    };
 
    //==============================================================================
    class JUCE_API  QuadraticTo  : public ElementBase
    {
    public:
        QuadraticTo (const RelativePoint& controlPoint, const RelativePoint& endPoint);
        ValueTree createTree() const;
        void addToPath (Path& path, Expression::Scope*) const;
        RelativePoint* getControlPoints (int& numPoints);
        ElementBase* clone() const;
 
        RelativePoint controlPoints[2];
 
    private:
        JUCE_DECLARE_NON_COPYABLE (QuadraticTo)
    };
 
    //==============================================================================
    class JUCE_API  CubicTo  : public ElementBase
    {
    public:
        CubicTo (const RelativePoint& controlPoint1, const RelativePoint& controlPoint2, const RelativePoint& endPoint);
        ValueTree createTree() const;
        void addToPath (Path& path, Expression::Scope*) const;
        RelativePoint* getControlPoints (int& numPoints);
        ElementBase* clone() const;
 
        RelativePoint controlPoints[3];
 
    private:
        JUCE_DECLARE_NON_COPYABLE (CubicTo)
    };
 
    //==============================================================================
    void addElement (ElementBase* newElement);
 
    //==============================================================================
    OwnedArray <ElementBase> elements;
    bool usesNonZeroWinding;
 
private:
    class Positioner;
    friend class Positioner;
    bool containsDynamicPoints;
 
    void applyTo (DrawablePath& path) const;
 
    RelativePointPath& operator= (const RelativePointPath&);
    JUCE_LEAK_DETECTOR (RelativePointPath)
};
 
 
#endif   // JUCE_RELATIVEPOINTPATH_H_INCLUDED