* Added the m_rotate_action to qetelementeditor.ui * Adding QAction to qetelementeditor.cpp and connecting it to new slot RotateElementsCommand defined in editorcommands.cpp

* Some types of elements need to specialize the setRotation method in order to behave correctly :
- PartTerminal needs to call setOrientation
- PartLine, PartRectangle and PartPolygon need a different rotation center.

sources/editor/graphicspart/partterminal.cpp

@@ -140,6 +140,7 @@ QRectF PartTerminal::boundingRect() const
 	return(br);
 }
 
+
 /**
 	Definit l'orientation de la borne
 	@param ori la nouvelle orientation de la borne
@@ -151,6 +152,32 @@ void PartTerminal::setOrientation(Qet::Orientation ori) {
 	updateSecondPoint();
 	emit orientationChanged();
 }
+
+/**
+    Redéfinit la fonction de rotation pour la traduire en orientation de la borne
+    @param angle
+*/
+void PartTerminal::setRotation(qreal angle) {
+    qreal angle_mod = std::fmod(angle,360);
+    Qet::Orientation new_ori = Qet::North;
+
+    if      (0   <= angle_mod && angle_mod < 90 ) new_ori = Qet::North;
+    else if (90  <= angle_mod && angle_mod < 180) new_ori = Qet::East;
+    else if (180 <= angle_mod && angle_mod < 270) new_ori = Qet::South;
+    else new_ori = Qet::West;
+
+    setOrientation(new_ori);
+}
+
+qreal PartTerminal::rotation() const {
+    switch (d->m_orientation) {
+     case Qet::North : return 0;
+     case Qet::East  : return 90;
+     case Qet::South : return 180;
+     case Qet::West  : return 270;
+    }
+}
+
 /**
 	@brief PartTerminal::setName
 	@param name