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POTreeCellRenderer: applying different style of the node's text which is depending on the user object's type
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  1. POTreeCellRenderer: applying different style of the node's text which is depending on the user object's type
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    copied!<p>I have a tree with DefaultMutableTreeNodes only. I want to write a TreeCellRenderer that depends on the type of the contained user object. I tried to write a simple example (which doesn't work. That's why I ended up here). On the first level beyond the root node, the types of the user objects are either <code>AANodeUserObject</code>or <code>LocalAANodeUserObject</code>. Both should be rendered with directory icons even though there might be no child. The other feature of this renderer is, that it should render nodes with user object type <code>AANodeUserObject</code> in red color and bold when they are not "current" (in my example, this is always <code>true</code>). Here is my code:</p> <pre><code> public Component getTreeCellRendererComponent(final JTree tree, final Object value, final boolean sel, final boolean expanded, final boolean leaf, final int row, final boolean hasFocus) { super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus); // Precondition für Default TreeNode Object userObject = ((DefaultMutableTreeNode) value).getUserObject(); if (userObject instanceof TestTree.AANodeUserObject || userObject instanceof TestTree.LocalAANodeUserObject) { if (expanded) { setIcon(openIcon); } else { setIcon(closedIcon); } } if (userObject instanceof TestTree.AANodeUserObject) { TestTree.AANodeUserObject aAnode = (TestTree.AANodeUserObject) userObject; if (!mVersionInfo.get(aAnode)) { renderOutdatedAaNode(); } else { renderDefault(); } } else { renderDefault(); } return this; } private void renderDefault() { setTextNonSelectionColor(cColorBlack); setTextSelectionColor(cColorBlack); setFont(getFont().deriveFont(Font.PLAIN)); } private void renderOutdatedAaNode() { setTextNonSelectionColor(cColorRed); setTextSelectionColor(cColorRed); setFont(getFont().deriveFont(Font.BOLD)); } </code></pre> <p>You can see the result on the attached picture<img src="https://i.stack.imgur.com/ldbVl.png" alt="The resulting tree">. </p> <p>What irritates me is that the directory-icon-thing works fine, the text style doesn't: only the second node (Hashmap value is <code>false</code>) AANodeUserObject should be red and nothing else. What am I doing wrong? Can somebody help? Thanks! Mathias</p>
 

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