xform.h Example File | Qt Widgets 5.12.10

- Qt 5.12
- Qt Widgets
- Affine Transformations
- xform.h Example File
- Qt 5.12.10 Reference Documentation

# xform.h Example File

painting/affine/xform.h

     /****************************************************************************
     **
     ** Copyright (C) 2016 The Qt Company Ltd.
     ** Contact: https://www.qt.io/licensing/
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** Commercial License Usage
     ** Licensees holding valid commercial Qt licenses may use this file in
     ** accordance with the commercial license agreement provided with the
     ** Software or, alternatively, in accordance with the terms contained in
     ** a written agreement between you and The Qt Company. For licensing terms
     ** and conditions see https://www.qt.io/terms-conditions. For further
     ** information use the contact form at https://www.qt.io/contact-us.
     **
     ** BSD License Usage
     ** Alternatively, you may use this file under the terms of the BSD license
     ** as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of The Qt Company Ltd nor the names of its
     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
     **
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #ifndef XFORM_H
     #define XFORM_H

     #include "arthurwidgets.h"

     #include <QBasicTimer>
     #include <QPolygonF>

     class HoverPoints;

     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 *) override;
         void drawVectorType(QPainter *painter);
         void drawPixmapType(QPainter *painter);
         void drawTextType(QPainter *painter);
         QSize sizeHint() const override { return QSize(500, 500); }

         void mousePressEvent(QMouseEvent *e) override;
         void resizeEvent(QResizeEvent *e) override;
         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) override;
     #if QT_CONFIG(wheelevent)
         void wheelEvent(QWheelEvent *) override;
     #endif

     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