christmas_ecards/mainwidget.h

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 #ifndef MAINWIDGET_H
 #define MAINWIDGET_H

 #include <QMainWindow>

 class ImageWidget;

 class MainWidget : public QMainWindow
 {
     Q_OBJECT

 public:
     MainWidget(QWidget *parent = 0);

 public slots:
     void openDirectory(const QString &path);

 private:
     bool loadImage(const QString &fileName);

     ImageWidget *imageWidget;
 };

 #endif