xtp starts with push buttons in the main widget

src/gui/main.ui

@@ -18,7 +18,35 @@
     <normaloff>:/xtpcpp_icon/resources/xtandempipeline_icon.svg</normaloff>:/xtpcpp_icon/resources/xtandempipeline_icon.svg</iconset>
   </property>
   <widget class="QWidget" name="centralwidget">
-   <layout class="QGridLayout" name="gridLayout"/>
+   <layout class="QGridLayout" name="gridLayout">
+    <item row="0" column="0">
+     <widget class="QWidget" name="default_display_widget" native="true">
+      <layout class="QVBoxLayout" name="verticalLayout_2">
+       <item>
+        <widget class="QPushButton" name="pushButton">
+         <property name="text">
+          <string>run X!Tandem identifications</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="pushButton_2">
+         <property name="text">
+          <string>Load identification results (mzIdentML, pepxml, tandem...)</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="pushButton_3">
+         <property name="text">
+          <string>Load an X!TandemPipeline project</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </widget>
+    </item>
+   </layout>
   </widget>
   <widget class="QMenuBar" name="menubar">
    <property name="geometry">
@@ -329,6 +357,54 @@
     </hint>
    </hints>
   </connection>
+  <connection>
+   <sender>pushButton</sender>
+   <signal>clicked()</signal>
+   <receiver>Main</receiver>
+   <slot>doActionTandemRun()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>355</x>
+     <y>106</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>805</x>
+     <y>133</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>pushButton_2</sender>
+   <signal>clicked()</signal>
+   <receiver>Main</receiver>
+   <slot>loadResults()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>362</x>
+     <y>192</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>694</x>
+     <y>216</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>pushButton_3</sender>
+   <signal>clicked()</signal>
+   <receiver>Main</receiver>
+   <slot>selectXpipFile()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>364</x>
+     <y>276</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>805</x>
+     <y>299</y>
+    </hint>
+   </hints>
+  </connection>
  </connections>
  <slots>
   <slot>selectXpipFile()</slot>

src/gui/mainwindow.cpp

@@ -70,7 +70,8 @@ MainWindow::MainWindow(QWidget *parent):
 
     ui->menu_export_files->setDisabled(true);
     ui->centralwidget->layout()->addWidget(_project_window);
-    _project_window->show();
+    _project_window->hide();
+    ui->default_display_widget->show();
     //_protein_list_window = new ProteinListWindow(this);
     //QDockWidget *dock = new QDockWidget(tr("Protein List"), this);
     //dock->setWidget(_protein_list_window);
@@ -236,6 +237,10 @@ void MainWindow::doProjectReady(ProjectSp project_sp) {
 
     ui->menu_export_files->setDisabled(false);
     ui->menu_edit->setDisabled(false);
+    
+    
+    _project_window->show();
+    ui->default_display_widget->hide();
 
     qDebug() << "MainWindow::doProjectReady end";
 }