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# xform.h Example File
demos/affine/xform.h

     /****************************************************************************
     **
     ** Copyright (C) 2005-$THISYEAR$ $TROLLTECH$. All rights reserved.
     **
     ** This file is part of the $MODULE$ of the Qt Toolkit.
     **
     ** $TROLLTECH_DUAL_LICENSE$
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #ifndef XFORM_H
     #define XFORM_H

     #include "arthurwidgets.h"

     #include <QBasicTimer>
     #include <QPolygonF>

     class HoverPoints;
     QT_FORWARD_DECLARE_CLASS(QLineEdit)

     class XFormView : public ArthurFrame
     {
         Q_OBJECT

         Q_PROPERTY(bool animation READ animation WRITE setAnimation)
         Q_PROPERTY(qreal shear READ shear WRITE setShear)
         Q_PROPERTY(qreal rotation READ rotation WRITE setRotation)
         Q_PROPERTY(qreal scale READ scale WRITE setScale)

     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(); }
         qreal shear() const { return m_shear; }
         qreal scale() const { return m_scale; }
         qreal rotation() const { return m_rotation; }
         void setShear(qreal s);
         void setScale(qreal s);
         void setRotation(qreal r);

     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;
         qreal m_rotation;
         qreal m_scale;
         qreal m_shear;
         XFormType type;
         QPixmap pixmap;
         QBasicTimer timer;
     };

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

     private:
         XFormView *view;
     };

     #endif // XFORM_H