christmas_ecards/mainwidget.cpp

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 #include "imagewidget.h"
 #include "mainwidget.h"

 MainWidget::MainWidget(QWidget *parent)
     : QMainWindow(parent)
 {
     //resize(400, 300);
     imageWidget = new ImageWidget(this);
     setCentralWidget(imageWidget);
 }

 void MainWidget::openDirectory(const QString &path)
 {
     imageWidget->openDirectory(path);
 }