diff --git a/apps/sample/trimesh_QT/glarea.cpp b/apps/sample/trimesh_QT/glarea.cpp
index bf5d14b1..70655f72 100644
--- a/apps/sample/trimesh_QT/glarea.cpp
+++ b/apps/sample/trimesh_QT/glarea.cpp
@@ -8,7 +8,7 @@
  *                                                                    \      *
  * All rights reserved.                                                      *
  *                                                                           *
- * This program is free software; you can redistribute it and/or modify      *   
+ * This program is free software; you can redistribute it and/or modify      *
  * it under the terms of the GNU General Public License as published by      *
  * the Free Software Foundation; either version 2 of the License, or         *
  * (at your option) any later version.                                       *
@@ -40,52 +40,52 @@ Initial release.
 GLArea::GLArea (QWidget * parent)
           :QGLWidget (parent)
 {
-	drawmode= SMOOTH;
-	GLArea::loadTetrahedron();
+    drawmode= SMOOTH;
+    GLArea::loadTetrahedron();
 }
 
 void GLArea::selectDrawMode(int mode){
-	drawmode=DrawMode(mode);
-	updateGL();
+    drawmode=DrawMode(mode);
+    updateGL();
 }
 
 void GLArea::loadMesh(QString fileName)
-{	
+{
    int err=vcg::tri::io::ImporterPLY<CMesh>::Open(mesh,(fileName.toStdString()).c_str());
-	if(err!=0){
-	  const char* errmsg=vcg::tri::io::ImporterPLY<CMesh>::ErrorMsg(err);
+    if(err!=0){
+      const char* errmsg=vcg::tri::io::ImporterPLY<CMesh>::ErrorMsg(err);
           QMessageBox::warning(this,tr("Error Loading Mesh"),QString(errmsg));
-	}
-	initMesh("Loaded \""+fileName+"\".");
+    }
+    initMesh("Loaded \""+fileName+"\".");
 }
 
 void GLArea::loadTetrahedron(){
-	vcg::tri::Tetrahedron(mesh);
-	initMesh(tr("Tethraedron [builtin]"));
+    vcg::tri::Tetrahedron(mesh);
+    initMesh(tr("Tethraedron [builtin]"));
 }
 
 void GLArea::loadDodecahedron(){
-	vcg::tri::Dodecahedron(mesh);
-	initMesh(tr("Dodecahedron [builtin]"));
+    vcg::tri::Dodecahedron(mesh);
+    initMesh(tr("Dodecahedron [builtin]"));
 }
 
 void GLArea::initMesh(QString message)
 {
-	// update bounding box
-	vcg::tri::UpdateBounding<CMesh>::Box(mesh);
-	// update Normals
+    // update bounding box
+    vcg::tri::UpdateBounding<CMesh>::Box(mesh);
+    // update Normals
         vcg::tri::UpdateNormal<CMesh>::PerVertexNormalizedPerFace(mesh);
         vcg::tri::UpdateNormal<CMesh>::PerFaceNormalized(mesh);
-	// Initialize the opengl wrapper
- 	glWrap.m = &mesh;
-  	glWrap.Update();
-  	updateGL();
-  	emit setStatusBar(message);	
+    // Initialize the opengl wrapper
+    glWrap.m = &mesh;
+    glWrap.Update();
+    updateGL();
+    emit setStatusBar(message);
 }
 
 void GLArea::initializeGL ()
 {
-  glClearColor(0, 0, 0, 0); 
+  glClearColor(0, 0, 0, 0);
   glEnable(GL_LIGHTING);
   glEnable(GL_LIGHT0);
   glEnable(GL_NORMALIZE);
@@ -96,7 +96,7 @@ void GLArea::initializeGL ()
 
 void GLArea::resizeGL (int w, int h)
 {
-  glViewport (0, 0, (GLsizei) w, (GLsizei) h); 
+  glViewport (0, 0, (GLsizei) w, (GLsizei) h);
   initializeGL();
  }
 
@@ -105,46 +105,46 @@ void GLArea::paintGL ()
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
-    gluPerspective(40, GLArea::width()/(float)GLArea::height(), 0.1, 100);
+    gluPerspective(25, GLArea::width()/(float)GLArea::height(), 0.1, 100);
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();
     gluLookAt(0,0,5,   0,0,0,   0,1,0);
     track.center=vcg::Point3f(0, 0, 0);
     track.radius= 1;
-	track.GetView();
+    track.GetView();
     track.Apply();
     glPushMatrix();
-    float d=1.0f/mesh.bbox.Diag();
+    float d=2.0f/mesh.bbox.Diag();
     vcg::glScale(d);
-	glTranslate(-glWrap.m->bbox.Center());	
-	// the trimesh drawing calls
-	switch(drawmode)
-	{
-	  case SMOOTH: 
-	  	glWrap.Draw<vcg::GLW::DMSmooth,   vcg::GLW::CMNone,vcg::GLW::TMNone> ();
-	  	break;
-	  case POINTS: 
-	  	glWrap.Draw<vcg::GLW::DMPoints,   vcg::GLW::CMNone,vcg::GLW::TMNone> ();
-	  	break;
-	  case WIRE: 
-	    glWrap.Draw<vcg::GLW::DMWire,     vcg::GLW::CMNone,vcg::GLW::TMNone> ();
-	    break;
-	  case FLATWIRE: 
-	  	glWrap.Draw<vcg::GLW::DMFlatWire, vcg::GLW::CMNone,vcg::GLW::TMNone> ();
-	  	break;
-	  case HIDDEN: 
-	  	glWrap.Draw<vcg::GLW::DMHidden,   vcg::GLW::CMNone,vcg::GLW::TMNone> ();
-	  	break;
-	  case FLAT: 
-	  	glWrap.Draw<vcg::GLW::DMFlat,     vcg::GLW::CMNone,vcg::GLW::TMNone> ();
-	  	break;
-	  default: 
-	  	break;
-	}
+    glTranslate(-glWrap.m->bbox.Center());
+    // the trimesh drawing calls
+    switch(drawmode)
+    {
+      case SMOOTH:
+        glWrap.Draw<vcg::GLW::DMSmooth,   vcg::GLW::CMNone,vcg::GLW::TMNone> ();
+        break;
+      case POINTS:
+        glWrap.Draw<vcg::GLW::DMPoints,   vcg::GLW::CMNone,vcg::GLW::TMNone> ();
+        break;
+      case WIRE:
+        glWrap.Draw<vcg::GLW::DMWire,     vcg::GLW::CMNone,vcg::GLW::TMNone> ();
+        break;
+      case FLATWIRE:
+        glWrap.Draw<vcg::GLW::DMFlatWire, vcg::GLW::CMNone,vcg::GLW::TMNone> ();
+        break;
+      case HIDDEN:
+        glWrap.Draw<vcg::GLW::DMHidden,   vcg::GLW::CMNone,vcg::GLW::TMNone> ();
+        break;
+      case FLAT:
+        glWrap.Draw<vcg::GLW::DMFlat,     vcg::GLW::CMNone,vcg::GLW::TMNone> ();
+        break;
+      default:
+        break;
+    }
 
     glPopMatrix();
     track.DrawPostApply();
-} 
+}
 
 void GLArea::keyReleaseEvent (QKeyEvent * e)
 {
@@ -174,21 +174,21 @@ void GLArea::mousePressEvent (QMouseEvent * e)
 {
   e->accept ();
   setFocus ();
-  track.MouseDown (e->x (), height () - e->y (), QT2VCG (e->button (), e->modifiers ()));
+  track.MouseDown (QT2VCG_X(this,e), QT2VCG_Y(this,e), QT2VCG (e->button (), e->modifiers ()));
   updateGL ();
 }
 
 void GLArea::mouseMoveEvent (QMouseEvent * e)
 {
   if (e->buttons ()) {
-    track.MouseMove (e->x (), height () - e->y ());
+    track.MouseMove (QT2VCG_X(this,e), QT2VCG_Y(this,e));
     updateGL ();
   }
 }
 
 void GLArea::mouseReleaseEvent (QMouseEvent * e)
 {
-  track.MouseUp (e->x (), height () - e->y (), QT2VCG (e->button (), e->modifiers ()));
+  track.MouseUp (QT2VCG_X(this,e), QT2VCG_Y(this,e), QT2VCG (e->button (), e->modifiers ()));
   updateGL ();
 }