Tidy up rendering for the tree to make it not look terrible

Fixes issue 2643: Expose plugin licences

Change-Id: Ib5b7e6cdf2b12c3f08009316f8d716583d724543
Reviewed-on: http://gerrit.dmdirc.com/774
Reviewed-by: Chris Smith <chris@dmdirc.com>
Automatic-Compile: Chris Smith <chris@dmdirc.com>

src/com/dmdirc/addons/ui_swing/dialogs/about/LicenceRenderer.java

@@ -0,0 +1,64 @@
+/*
+ * 
+ * Copyright (c) 2006-2010 Chris Smith, Shane Mc Cormack, Gregory Holmes
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package com.dmdirc.addons.ui_swing.dialogs.about;
+
+import com.dmdirc.plugins.PluginInfo;
+
+import java.awt.Component;
+
+import javax.swing.JLabel;
+import javax.swing.JTree;
+import javax.swing.tree.DefaultMutableTreeNode;
+import javax.swing.tree.DefaultTreeCellRenderer;
+
+/**
+ * Simple renderer to show licence info in the tree.
+ */
+public class LicenceRenderer extends DefaultTreeCellRenderer {
+
+    /**
+     * A version number for this class. It should be changed whenever the class
+     * structure is changed (or anything else that would prevent serialized
+     * objects being unserialized with the new class).
+     */
+    private static final long serialVersionUID = 1;
+
+    /** {@inheritDoc} */
+    @Override
+    public Component getTreeCellRendererComponent(JTree tree, Object value,
+            boolean sel, boolean expanded, boolean leaf, int row,
+            boolean hasFocus) {
+        final JLabel label = (JLabel) super.getTreeCellRendererComponent(tree,
+                value, sel, expanded, leaf, row, hasFocus);
+        label.setIcon(null);
+        label.setBackground(tree.getBackground());
+        label.setForeground(tree.getForeground());
+        label.setOpaque(false);
+        if (((DefaultMutableTreeNode) value).getUserObject() instanceof PluginInfo) {
+            setText(((PluginInfo) ((DefaultMutableTreeNode) value).getUserObject()).
+                    getNiceName());
+        }
+        return label;
+    }
+}

src/com/dmdirc/addons/ui_swing/dialogs/about/LicencesPanel.java

@@ -28,6 +28,7 @@ import com.dmdirc.plugins.PluginInfo;
 
 import java.awt.Font;
 import java.awt.Rectangle;
+import javax.swing.BorderFactory;
 
 import javax.swing.JEditorPane;
 import javax.swing.JPanel;
@@ -40,6 +41,7 @@ import javax.swing.text.html.HTMLDocument;
 import javax.swing.text.html.HTMLEditorKit;
 import javax.swing.tree.DefaultMutableTreeNode;
 import javax.swing.tree.DefaultTreeModel;
+import net.miginfocom.layout.PlatformDefaults;
 
 import net.miginfocom.swing.MigLayout;
 
@@ -62,8 +64,6 @@ public final class LicencesPanel extends JPanel implements TreeSelectionListener
     private JEditorPane licence;
     /** Licence list. */
     private JTree list;
-    /** Selected index. */
-    private int selectedIndex;
 
     /** Creates a new instance of LicencesPanel. */
     public LicencesPanel() {
@@ -111,7 +111,14 @@ public final class LicencesPanel extends JPanel implements TreeSelectionListener
                 super.scrollRectToVisible(rect);
             }
         };
+        list.setBorder(BorderFactory.createEmptyBorder(
+                (int) PlatformDefaults.getUnitValueX("related").getValue(),
+                (int) PlatformDefaults.getUnitValueX("related").getValue(),
+                (int) PlatformDefaults.getUnitValueX("related").getValue(),
+                (int) PlatformDefaults.getUnitValueX("related").getValue()));
+        list.setCellRenderer(new LicenceRenderer());
         list.setRootVisible(false);
+        list.setOpaque(false);
         new TreeScroller(list);
         new LicenceLoader(list, listModel).execute();
         licence = new JEditorPane();