New Delete Button eingefügt

src/ui/view/GUI.java

@@ -191,10 +191,10 @@ public class GUI implements CategoryListener {
 	private final JPanel panelHolonEl = new JPanel();
 	private final JComboBox comboBox = new JComboBox();
 	// Buttons
-	private final JButton btnAdd = new JButton("+");
-	private final JButton btnDel = new JButton("-");
-	private final JButton btnAddHolEL = new JButton("+");
-	private final JButton btnDelHolEL = new JButton("-");
+	private final JButton btnAdd = new JButton("New");
+	private final JButton btnDel = new JButton("Delete");
+	private final JButton btnAddHolEL = new JButton("New");
+	private final JButton btnDelHolEL = new JButton("Delete");
 	private final JButton resetGraphBtn = new JButton("Reset");
 	private final JToolBar toolBar = new JToolBar();
 	private final JToolBar toolBarHolonEl = new JToolBar();
@@ -1177,6 +1177,9 @@ public class GUI implements CategoryListener {
 					triggerUpdateController(null);
 					contentPane.updateUI();
 				}
+			}else
+			{
+				JOptionPane.showMessageDialog(contentPane, "No object selected.\nPlease select a object first." , "Message" , JOptionPane.INFORMATION_MESSAGE);
 			}
 		});
 		/*
@@ -1188,6 +1191,10 @@ public class GUI implements CategoryListener {
 				if (model.getSelectedCpsObjects().size() == 1) {
 					if (updCon.getActualCps().getClass() == HolonObject.class) {
 						HolonObject obj = (HolonObject) updCon.getActualCps();
+						if(selectedElements.isEmpty())
+						{
+							JOptionPane.showMessageDialog(contentPane, "No element selectet.\nPlease select a element in the list first." , "Message" , JOptionPane.INFORMATION_MESSAGE);
+						}
 						for (HolonElement e : selectedElements) {
 							controller.deleteElementCanvas(obj.getId(),
 									e.getId());
@@ -1210,7 +1217,10 @@ public class GUI implements CategoryListener {
 		triggerUpdateController(null);
 		model.getEleToDelete().clear();
 		selectedElements.clear();
-	}
+	}else
+			{
+				JOptionPane.showMessageDialog(contentPane, "No object selectet.\nPlease select a object first." , "No object selectet" , JOptionPane.INFORMATION_MESSAGE);
+			}
 	triggerUpdateController(null);
 	elementGraph.setText(Languages.getLanguage()[25]);
 	holonEleNamesDisplayed = Languages.getLanguage()[25];
@@ -1937,10 +1947,11 @@ public class GUI implements CategoryListener {
 
 		panel.add(toolBar);
 		comboBox.setMaximumSize(new Dimension(100, 20));
-		toolBar.add(comboBox);
-		comboBox.setModel(new DefaultComboBoxModel(comboBoxCat));
+		//toolBar.add(comboBox);
+		//comboBox.setModel(new DefaultComboBoxModel(comboBoxCat));
 		// Add Buttonnew DefaultComboBoxModel(comboBoxCat)
 		btnAdd.addActionListener(actionEvent -> {
+			/*
 			Object nodeInfo = tree.getLastSelectedPathComponent();
 			String selectedOption = comboBox.getSelectedItem().toString();
 			DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) nodeInfo;
@@ -1978,6 +1989,7 @@ public class GUI implements CategoryListener {
 			} catch (Exception e) {
 			}
 			tree.repaint();
+			*/
 		});
 		
 		/**