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

     /****************************************************************************
     **
     ** Copyright (C) 2005-2007 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License version 2.0 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 ensure GNU
     ** General Public Licensing requirements will be met:
     ** http://www.trolltech.com/products/qt/opensource.html
     **
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     ** review the following information:
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     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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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 setShear)
         Q_PROPERTY(double rotation READ rotation WRITE setRotation)
         Q_PROPERTY(double 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(); }
         double shear() const { return m_shear; }
         double scale() const { return m_scale; }
         double rotation() const { return m_rotation; }
         void setShear(double s);
         void setScale(double s);
         void setRotation(double 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;
         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