properly adjust status bar position when the main window resizes

mainstatusbar.cc

@@ -24,6 +24,7 @@ MainStatusBar::MainStatusBar(QWidget *parent) : QWidget(parent)
   picWidget->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 
   timer = new QTimer(this);
+  timer->setSingleShot(true);
 
   // layout
   QHBoxLayout * layout = new QHBoxLayout;
@@ -35,6 +36,8 @@ MainStatusBar::MainStatusBar(QWidget *parent) : QWidget(parent)
   layout->addWidget(textWidget);
   setLayout(layout);
 
+  parentWidget()->installEventFilter( this );
+
   connect( timer, SIGNAL( timeout() ), SLOT( clearMessage() ) );
 }
 
@@ -94,3 +97,16 @@ void MainStatusBar::mousePressEvent ( QMouseEvent * )
 {
   clearMessage();
 }
+
+bool MainStatusBar::eventFilter(QObject *, QEvent * e)
+{
+  switch ( e->type() ) {
+    case QEvent::Resize:
+      refresh();
+      break;
+    default:
+      break;
+  };
+
+  return false;
+}

mainstatusbar.hh

@@ -34,6 +34,7 @@ private:
   QLabel * textWidget;
 
   QTimer * timer;
+  bool eventFilter(QObject *obj, QEvent * event);
   void refresh();
 };