qt-everywhere-src-5.14.1/qtbase/examples/widgets/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;

QT_BEGIN_NAMESPACE
class QLineEdit;
QT_END_NAMESPACE

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