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java swing中的JTree组件

发布于 2024-08-23 00:08:03 字数 50 浏览 4 评论 0原文

如何更改 Swing 的 JTree 组件中节点和根的图标？

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jJeQQOZ5 2024-08-30 00:08:03

使用 DefaultTreeCellRenderer 使用setClosedIcon、setOpenIcon和setLeafIcon。

复制自如何使用树：

ImageIcon leafIcon = createImageIcon("images/middle.gif");
if (leafIcon != null) {
    DefaultTreeCellRenderer renderer = 
    new DefaultTreeCellRenderer();
    renderer.setLeafIcon(leafIcon);
    tree.setCellRenderer(renderer);
}

With a DefaultTreeCellRenderer use setClosedIcon, setOpenIcon and setLeafIcon.

Copied from How to Use Trees:

ImageIcon leafIcon = createImageIcon("images/middle.gif");
if (leafIcon != null) {
    DefaultTreeCellRenderer renderer = 
    new DefaultTreeCellRenderer();
    renderer.setLeafIcon(leafIcon);
    tree.setCellRenderer(renderer);
}

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西瓜 2024-08-30 00:08:03

Sun 的关于 JTree 的教程有一节介绍了如何子类 TreeCellRenderer 以获取 JTree 中的节点和文本。

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只怪假的太真实 2024-08-30 00:08:03

如果您想要做的只是为闭合节点、叶子和打开节点使用不同的图标，那么这非常简单。

//创建3个图标
私有图标 customOpenIcon = new ImageIcon("images/my_open.gif");
私有图标 customClosedIcon = new ImageIcon("images/my_close.gif");
私有图标 customLeafIcon = new ImageIcon("images/my_leaf.gif");

//假设您创建了 DefaultMutableTreeNode 层次结构
DefaultMutableTreeNode rootNode = 新...
...
JTree 树 = new JTree(rootNode );

DefaultTreeCellRenderer customRenderer = new DefaultTreeCellRenderer();
customRenderer.setOpenIcon(customOpenIcon);
customRenderer.setClosedIcon(customClosedIcon);
customRenderer.setLeafIcon(customLeafIcon);
tree.setCellRenderer(customRenderer );

If all you trying to do is to have different Icons for closed node, leaf and opened nodes, it is very straight forward.

//Create 3 icons
private Icon customOpenIcon = new ImageIcon("images/my_open.gif");
private Icon customClosedIcon = new ImageIcon("images/my_closed.gif");
private Icon customLeafIcon = new ImageIcon("images/my_leaf.gif");

//Assuming you created your DefaultMutableTreeNode hierarchy
DefaultMutableTreeNode rootNode = new...
...
JTree tree = new JTree(rootNode );

DefaultTreeCellRenderer customRenderer = new DefaultTreeCellRenderer();
customRenderer.setOpenIcon(customOpenIcon);
customRenderer.setClosedIcon(customClosedIcon);
customRenderer.setLeafIcon(customLeafIcon);
tree.setCellRenderer(customRenderer );

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