feat: set application base infos

Change-Id: I56433844bf169c836b29d53de61db0907e27c5a8

src/main.cpp

@@ -17,13 +17,30 @@
  */
 
 #include "mainwindow.h"
-#include <QApplication>
+
+#include <DApplication>
+#include <QDebug>
+
+DWIDGET_USE_NAMESPACE
 
 int main(int argc, char *argv[])
 {
-    QApplication a(argc, argv);
+    DApplication::loadDXcbPlugin();
+    DApplication a(argc, argv);
+    a.setApplicationName("dde-introduction");
+
+    if (!a.setSingleInstance(a.applicationName(), DApplication::UserScope)) {
+        qWarning() << QString("There is a %1 running!!").arg(a.applicationName());
+        return -1;
+    }
+
+    a.setOrganizationName("deepin");
+    a.setApplicationVersion(DApplication::buildVersion("1.0"));
+    a.loadTranslator();
+
     MainWindow w;
-    w.show();
+    w.moveToCenter();
+    w.exec();
 
     return a.exec();
 }

src/mainwindow.cpp

@@ -17,10 +17,12 @@
  */
 
 #include "mainwindow.h"
+#include <QHBoxLayout>
 
 MainWindow::MainWindow(QWidget *parent)
-    : QMainWindow(parent)
+    : DDialog(parent)
 {
+
 }
 
 MainWindow::~MainWindow()

src/mainwindow.h

@@ -19,9 +19,11 @@
 #ifndef MAINWINDOW_H
 #define MAINWINDOW_H
 
-#include <QMainWindow>
+#include <ddialog.h>
 
-class MainWindow : public QMainWindow
+DWIDGET_USE_NAMESPACE
+
+class MainWindow : public DDialog
 {
     Q_OBJECT