Added "Edit -> Align All"

src/ui/view/GUI.java

@@ -221,6 +221,7 @@ public class GUI implements CategoryListener {
 	private final JMenuItem mntmRedo = new JMenuItem("Redo");
 	private final JMenuItem mntmEditEdges = new JMenuItem("Edge Properties");
 	private final JMenuItem mntmFindReplace = new JMenuItem("Find/ Replace");
+	private final JMenuItem mntmAlignAll = new JMenuItem("Align All");
 	private final JMenuItem mntmEditShowedInformation = new JMenuItem(
 			"Edit showed Information");
 	private final JMenuItem mntmResetCategory = new JMenuItem(
@@ -740,7 +741,8 @@ public class GUI implements CategoryListener {
 						ex.printStackTrace();
 					}
 				});
-
+	
+		
 		mnNewMenuEdit.add(mntmEditShowedInformation);
 		mnNewMenuEdit.add(mntmEditEdges);
 		mntmEditEdges.addActionListener(actionEvent -> {
@@ -749,7 +751,20 @@ public class GUI implements CategoryListener {
 			edgePopUp.setController(controller);
 			edgePopUp.setVisible(true);
 		});
-
+		
+		
+		//Edit -> Align All
+		
+		mnNewMenuEdit.add(mntmAlignAll);
+		mntmAlignAll.addActionListener(actionEvent -> {
+			// getScrollPaneFromTabbedPane().getViewport().getComponent(0) is always the active canvas
+			AbstractCanvas activeCanvas = ((AbstractCanvas) getScrollPaneFromTabbedPane().getViewport().getComponent(0));
+			if (activeCanvas != null) {
+				activeCanvas.tryToAlignObjects();
+			}
+		});
+		
+		
 		menuBar.add(mnNewMenuOptions);
 
 		mnNewMenuOptions.add(mntmResetCategory);