path: root/src/declarative/fx/qfxpath.h

/****************************************************************************
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
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#ifndef QFXPATH_H
#define QFXPATH_H

#include <QObject>
#include <QPainterPath>
#include <qml.h>
#include <qfxitem.h>


QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)
class Q_DECLARATIVE_EXPORT QFxPathElement : public QObject
{
    Q_OBJECT
public:
    QFxPathElement(QObject *parent=0) : QObject(parent) {}
Q_SIGNALS:
    void changed();
};
QML_DECLARE_TYPE(QFxPathElement);

class Q_DECLARATIVE_EXPORT QFxPathAttribute : public QFxPathElement
{
    Q_OBJECT

    Q_PROPERTY(QString name READ name WRITE setName)
    Q_PROPERTY(qreal value READ value WRITE setValue NOTIFY changed)
public:
    QFxPathAttribute(QObject *parent=0) : QFxPathElement(parent), _value(0) {}


    QString name() const;
    void setName(const QString &name);

    qreal value() const;
    void setValue(qreal value);

private:
    QString _name;
    qreal _value;
};
QML_DECLARE_TYPE(QFxPathAttribute);

class Q_DECLARATIVE_EXPORT QFxCurve : public QFxPathElement
{
    Q_OBJECT

    Q_PROPERTY(int x READ x WRITE setX NOTIFY changed)
    Q_PROPERTY(int y READ y WRITE setY NOTIFY changed)
public:
    QFxCurve(QObject *parent=0) : QFxPathElement(parent), _x(0), _y(0) {}

    int x() const;
    void setX(int x);

    int y() const;
    void setY(int y);

    virtual void addToPath(QPainterPath &) {}

private:
    int _x;
    int _y;
};
QML_DECLARE_TYPE(QFxCurve);

class Q_DECLARATIVE_EXPORT QFxPathLine : public QFxCurve
{
    Q_OBJECT
public:
    QFxPathLine(QObject *parent=0) : QFxCurve(parent) {}

    void addToPath(QPainterPath &path);
};
QML_DECLARE_TYPE(QFxPathLine);

class Q_DECLARATIVE_EXPORT QFxPathQuad : public QFxCurve
{
    Q_OBJECT

    Q_PROPERTY(int controlX READ controlX WRITE setControlX NOTIFY changed)
    Q_PROPERTY(int controlY READ controlY WRITE setControlY NOTIFY changed)
public:
    QFxPathQuad(QObject *parent=0) : QFxCurve(parent), _controlX(0), _controlY(0) {}

    int controlX() const;
    void setControlX(int x);

    int controlY() const;
    void setControlY(int y);

    void addToPath(QPainterPath &path);

private:
    int _controlX;
    int _controlY;
};
QML_DECLARE_TYPE(QFxPathQuad);

class Q_DECLARATIVE_EXPORT QFxPathCubic : public QFxCurve
{
    Q_OBJECT

    Q_PROPERTY(int control1X READ control1X WRITE setControl1X NOTIFY changed)
    Q_PROPERTY(int control1Y READ control1Y WRITE setControl1Y NOTIFY changed)
    Q_PROPERTY(int control2X READ control2X WRITE setControl2X NOTIFY changed)
    Q_PROPERTY(int control2Y READ control2Y WRITE setControl2Y NOTIFY changed)
public:
    QFxPathCubic(QObject *parent=0) : QFxCurve(parent), _control1X(0), _control1Y(0), _control2X(0), _control2Y(0) {}

    int control1X() const;
    void setControl1X(int x);

    int control1Y() const;
    void setControl1Y(int y);

    int control2X() const;
    void setControl2X(int x);

    int control2Y() const;
    void setControl2Y(int y);

    void addToPath(QPainterPath &path);

private:
    int _control1X;
    int _control1Y;
    int _control2X;
    int _control2Y;
};
QML_DECLARE_TYPE(QFxPathCubic);

class Q_DECLARATIVE_EXPORT QFxPathPercent : public QFxPathElement
{
    Q_OBJECT
    Q_PROPERTY(qreal value READ value WRITE setValue)
public:
    QFxPathPercent(QObject *parent=0) : QFxPathElement(parent) {}

    qreal value() const;
    void setValue(qreal value);

private:
    qreal _value;
};
QML_DECLARE_TYPE(QFxPathPercent);

class QFxPathPrivate;
class Q_DECLARATIVE_EXPORT QFxPath : public QObject, public QmlParserStatus
{
    Q_OBJECT

    Q_INTERFACES(QmlParserStatus);
    Q_PROPERTY(QList<QFxPathElement *>* pathElements READ pathElements)
    Q_PROPERTY(int startX READ startX WRITE setStartX)
    Q_PROPERTY(int startY READ startY WRITE setStartY)
    Q_CLASSINFO("DefaultProperty", "pathElements")
    Q_INTERFACES(QmlParserStatus)
public:
    QFxPath(QObject *parent=0);
    ~QFxPath();

    QList<QFxPathElement *>* pathElements();

    int startX() const;
    void setStartX(int x);

    int startY() const;
    void setStartY(int y);

    QPainterPath path() const;
    QStringList attributes() const;
    qreal attributeAt(const QString &, qreal) const;
    QPointF pointAt(qreal) const;

Q_SIGNALS:
    void changed();

protected:
    virtual void componentComplete();
    QFxPath(QFxPathPrivate &dd, QObject *parent);

private Q_SLOTS:
    void processPath();

private:
    struct AttributePoint {
        AttributePoint() : percent(0), scale(1), origpercent(0) {}
        AttributePoint(const AttributePoint &other)
            : percent(other.percent), scale(other.scale), origpercent(other.origpercent), values(other.values) {}
        AttributePoint &operator=(const AttributePoint &other) {
            percent = other.percent; scale = other.scale; origpercent = other.origpercent; values = other.values; return *this;
        }
        qreal percent;      //massaged percent along the painter path
        qreal scale;
        qreal origpercent;  //'real' percent along the painter path
        QHash<QString, qreal> values;
    };

    void interpolate(int idx, const QString &name, qreal value);
    void endpoint(const QString &name);
    void createPointCache() const;

private:
    Q_DISABLE_COPY(QFxPath)
    Q_DECLARE_PRIVATE(QFxPath)
};
QML_DECLARE_TYPE(QFxPath);

QT_END_NAMESPACE

QT_END_HEADER
#endif // QFXPATH_H