Qt 4.0: xform.h Example File (demos/affine/xform.h)

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# 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