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wigglywidget.h Example File
widgets/wiggly/wigglywidget.h

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 #ifndef WIGGLYWIDGET_H
 #define WIGGLYWIDGET_H

 #include <QBasicTimer>
 #include <QWidget>

 class WigglyWidget : public QWidget
 {
     Q_OBJECT

 public:
     WigglyWidget(QWidget *parent = 0);

 public slots:
     void setText(const QString &newText) { text = newText; }

 protected:
     void paintEvent(QPaintEvent *event);
     void timerEvent(QTimerEvent *event);

 private:
     QBasicTimer timer;
     QString text;
     int step;
 };

 #endif