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xform.h Example File

painting/affine/xform.h
 /****************************************************************************
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 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/
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 ** This file is part of the demonstration applications of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** GNU Lesser General Public License Usage
 ** This file may be used under the terms of the GNU Lesser General Public
 ** License version 2.1 as published by the Free Software Foundation and
 ** appearing in the file LICENSE.LGPL included in the packaging of this
 ** file. Please review the following information to ensure the GNU Lesser
 ** General Public License version 2.1 requirements will be met:
 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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 ** rights. These rights are described in the Nokia Qt LGPL Exception
 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU General
 ** Public License version 3.0 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 the GNU General
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 ****************************************************************************/

 #ifndef XFORM_H
 #define XFORM_H

 #include "arthurwidgets.h"

 #include <QBasicTimer>
 #include <QPolygonF>

 class HoverPoints;
 QT_FORWARD_DECLARE_CLASS(QLineEdit)

 class XFormView : public ArthurFrame
 {
 public:
     Q_OBJECT

     Q_PROPERTY(XFormType type READ type WRITE setType)
     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)
     Q_PROPERTY(QString text READ text WRITE setText)
     Q_PROPERTY(QPixmap pixmap READ pixmap WRITE setPixmap)
     Q_ENUMS(XFormType)

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

     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; }

     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);

     XFormType type() const;
     QPixmap pixmap() const;
     QString text() const;

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

     void setText(const QString &);
     void setPixmap(const QPixmap &);
     void setType(XFormType t);

     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:
     QPolygonF ctrlPoints;
     HoverPoints *pts;
     qreal m_rotation;
     qreal m_scale;
     qreal m_shear;
     XFormType m_type;
     QPixmap m_pixmap;
     QString m_text;
     QBasicTimer timer;
 };

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

 private:
     XFormView *view;
     QLineEdit *textEditor;
 };

 #endif // XFORM_H
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