rviz_plugin_tutorials: failed attempt to squarify the drive widget.

Author: hershwg

rviz_plugin_tutorials/src/drive_widget.cpp

@@ -43,6 +43,9 @@ DriveWidget::DriveWidget( QWidget* parent )
   , linear_max_( 10 )
   , angular_max_( 2 )
 {
+  QSizePolicy policy = sizePolicy();
+  policy.setHeightForWidth( true );
+  setSizePolicy( policy );
 }
 
 void DriveWidget::paintEvent( QPaintEvent* event )

rviz_plugin_tutorials/src/drive_widget.h

@@ -47,6 +47,7 @@ Q_OBJECT
   virtual void leaveEvent( QEvent* event );
 
   virtual QSize sizeHint() const { return QSize( 150, 150 ); }
+  virtual int heightForWidth( int width ) const { return width; } // enforce square widget
 
 Q_SIGNALS:
   void outputVelocity( float linear, float angular );