Changeset 4638 for trunk/gli/src/org/greenstone/gatherer/cdm/PlugInManager.java

Timestamp:

2003-06-13T11:24:14+12:00 (21 years ago)

Author:

kjdon

Message:

the remove and configure plugin/classifier buttons are now disabled if there is no selection in the list. also teh two lists have been made singly selectable - no more multiple selections

File:

• trunk/gli/src/org/greenstone/gatherer/cdm/PlugInManager.java (modified) (5 diffs)

trunk/gli/src/org/greenstone/gatherer/cdm/PlugInManager.java

@@ -669 +669 @@
         central_pane = new JPanel();
         configure = new JButton(get("Configure"));
+        configure.setEnabled(false);
         configure.setMnemonic(KeyEvent.VK_C);
         header_pane = new JPanel();
@@ -715 +716 @@
         movement_pane = new JPanel();
         plugin = new JComboBox(available);
-                //plugin.setEditable(true);
+        //plugin.setEditable(true);
         plugin.setSelectedIndex(0);
         plugin_label = new JLabel(get("PlugIn"));
         plugin_list = new JList(assigned);
         plugin_list.setCellRenderer(new ListRenderer());
+        plugin_list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
         plugin_list_label = new JLabel(get("Assigned"));
         plugin_list_label.setHorizontalAlignment(JLabel.CENTER);
@@ -726 +728 @@
         plugin_pane = new JPanel();
         remove = new JButton(get("Remove"));
+        remove.setEnabled(false);
         remove.setMnemonic(KeyEvent.VK_R);
         title = new JLabel(get("Title"));
         title.setHorizontalAlignment(JLabel.CENTER);
         title.setOpaque(true);
-                // Listeners
+        // Listeners
         add.addActionListener(new AddListener());
         configure.addActionListener(new ConfigureListener());
@@ -740 +743 @@
         remove.addActionListener(new RemoveListener());
         plugin_list.addMouseListener(new ClickListener());
-                // Layout
+        plugin_list.addListSelectionListener(new ListListener());
+        // Layout
         title.setBorder(BorderFactory.createEmptyBorder(0,0,2,0));
 
@@ -907 +911 @@
         }
     }
+
+    /** listens for changes in the list selection and enables the configure and remove buttons if there is a selection, disables them if there is no selection */
+    private class ListListener
+        implements ListSelectionListener {
+
+        public void valueChanged(ListSelectionEvent e) {
+        if (!e.getValueIsAdjusting()) { // we get two events for one change in list selection - use the false one ( the second one) 
+            if (plugin_list.isSelectionEmpty()) {
+            configure.setEnabled(false);
+            remove.setEnabled(false);
+            } else {
+            configure.setEnabled(true);
+            remove.setEnabled(true);
+            }
+        }
+        }
+    }
+
     /** Listens for actions apon the move buttons in the manager controls, and if detected calls the <i>movePlugIn()</i> method of the manager with the appropriate details. */
     private class MoveListener