JTree：如何获取节点的字体/文本颜色？

Question

I have the following code:

tree = getTreeComponent(BLA)

model = tree.getModel();
root = tree.getModel().getRoot();
childCount = tree.getModel().getChildCount(root);

childList = tree.getModel().getChild(root,x);

print childList

I can get the tree node as a Text but not the Color of Font/Text node.

Could you give me suggestions?

Answer 1

The appearance of the nodes is separated from the model. TreeCellRenderer is responsible to render the nodes of the tree which can be set using JTree.setCellRenderer() .

So if you want to know the Font and Color of a node, you should consult the renderer of the JTree . For example:

Component c = tree.getCellRenderer()
    .getTreeCellRendererComponent(tree, node, false, false, false, 0, false);

Font font = c.getFont();         // Font used to render the node
Color color = c.getForeground(); // Foreground Color used to render the node

The renderer's getTreeCellRendererComponent() returns a Component which will be used to paint the node.

The parameters of the getTreeCellRendererComponent() are:

JTree tree, Object value, boolean selected, boolean expanded,
boolean leaf, int row, boolean hasFocus

Passing different values to these parameters may result in the returned Component having different Font and/or Color . Specify meaningful parameter values (eg it should not be selected as it usually inverts the colors, it should not have focus as it might also change the color).