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

    #ifndef XFORM_H
    #define XFORM_H

    #include "arthurwidgets.h"
    #include <qbasictimer.h>

    class HoverPoints;

    class XFormView : public ArthurFrame
    {
        Q_OBJECT

    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;

    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 rotation;
        double scale;
        double shear;
        XFormType type;
        QPixmap pixmap;
        QBasicTimer timer;
    };

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

    private:
        XFormView *view;
    };

    #endif // XFORM_H