Creating a Notification widget in the Main Window.

The main error message bar can be used to show exporting information and
other notification.

So a new Notification handler object is created in the main window
<NotificationWidget> that inherits <KMessageWidget> that shows different
type of notifications, ex. (Warning, Error and information)

Also this class contains a QFutureWatcher object that is set to handle
the QFuture variable returned from the exporting thread. this will allow
the UI to be updated when the thread finishes execution.

Signed-off-by: Gehad elrobey <gehadelrobey@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

qt-ui/notificationwidget.h

@@ -0,0 +1,31 @@
+#ifndef NOTIFICATIONWIDGET_H
+#define NOTIFICATIONWIDGET_H
+
+#include <QWidget>
+#include <QFutureWatcher>
+
+#include <kmessagewidget.h>
+
+namespace Ui {
+	class NotificationWidget;
+}
+
+class NotificationWidget : public KMessageWidget {
+	Q_OBJECT
+
+public:
+	explicit NotificationWidget(QWidget *parent = 0);
+	void setFuture(const QFuture<void> &future);
+	void showNotification(QString message, KMessageWidget::MessageType type);
+	void hideNotification();
+	~NotificationWidget();
+
+private:
+	QFutureWatcher<void> *future_watcher;
+
+private
+slots:
+	void finish();
+};
+
+#endif // NOTIFICATIONWIDGET_H