xform.h Example File

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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
  {
  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;
  #ifndef QT_NO_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