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xform.h Example File
^{demos/affine/xform.h}

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    #ifndef XFORM_H
    #define XFORM_H

    #include "arthurwidgets.h"

    #include <QBasicTimer>
    #include <QPolygonF>

    class HoverPoints;
    class QLineEdit;

    class XFormView : public ArthurFrame
    {
        Q_OBJECT

        Q_PROPERTY(bool animation READ animation WRITE setAnimation)
        Q_PROPERTY(double shear READ shear WRITE changeShear)
        Q_PROPERTY(double rotation READ rotation WRITE changeRotation)
        Q_PROPERTY(double scale READ scale WRITE changeScale)

    public:
        XFormView(QWidget *parent);
        void paint(QPainter *);
        void drawVectorType(QPainter *painter);
        void drawPixmapType(QPainter *painter);
        void drawTextType(QPainter *painter);
        QSize sizeHint() const { return QSize(500, 500); }

        void mousePressEvent(QMouseEvent *e);
        void resizeEvent(QResizeEvent *e);
        HoverPoints *hoverPoints() { return pts; }

        QLineEdit *textEditor;

        bool animation() const { return timer.isActive(); }
        double shear() const { return m_shear; }
        double scale() const { return m_scale; }
        double rotation() const { return m_rotation; }

    public slots:
        void setAnimation(bool animate);
        void updateCtrlPoints(const QPolygonF &);
        void changeRotation(int rotation);
        void changeScale(int scale);
        void changeShear(int shear);

        void setVectorType();
        void setPixmapType();
        void setTextType();
        void reset();

    signals:
        void rotationChanged(int rotation);
        void scaleChanged(int scale);
        void shearChanged(int shear);

    protected:
        void timerEvent(QTimerEvent *e);
        void wheelEvent(QWheelEvent *);

    private:
        enum XFormType { VectorType, PixmapType, TextType };

        QPolygonF ctrlPoints;
        HoverPoints *pts;
        double m_rotation;
        double m_scale;
        double m_shear;
        XFormType type;
        QPixmap pixmap;
        QBasicTimer timer;
    };

    class XFormWidget : public QWidget
    {
        Q_OBJECT
    public:
        XFormWidget(QWidget *parent);

    private:
        XFormView *view;
    };

    #endif // XFORM_H