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characterwidget.h Example File
widgets/charactermap/characterwidget.h

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 #ifndef CHARACTERWIDGET_H
 #define CHARACTERWIDGET_H

 #include <QFont>
 #include <QPoint>
 #include <QSize>
 #include <QString>
 #include <QWidget>

 class QMouseEvent;
 class QPaintEvent;

 class CharacterWidget : public QWidget
 {
     Q_OBJECT

 public:
     CharacterWidget(QWidget *parent = 0);
     QSize sizeHint() const;

 public slots:
     void updateFont(const QFont &font);
     void updateSize(const QString &fontSize);
     void updateStyle(const QString &fontStyle);
     void updateFontMerging(bool enable);

 signals:
     void characterSelected(const QString &character);

 protected:
     void mouseMoveEvent(QMouseEvent *event);
     void mousePressEvent(QMouseEvent *event);
     void paintEvent(QPaintEvent *event);

 private:
     QFont displayFont;
     int columns;
     int lastKey;
     int squareSize;
 };

 #endif