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[英]How do i change color of Jtree based on my dynamic changing Jtree for java desktop application
[英]How do I make my TreeCellRenderer fill my JTree?
如何让我的树形细胞填充我的JTree的宽度:
JTree tree = new JTree();
tree.setCellRenderer(new TreeCellRenderer() {
@Override
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
// TODO: How do I make this panel fill the width
// of the JTree?
JPanel panel = new JPanel();
panel.add(new JLabel("ITEM");
return panel;
}
});
add(tree);
JPanel panel = new JPanel();
, JPanel
是容器,
默认情况下,空JPanel
返回zero Dimension
,
只有空JPanel
(仅限AFAIK)在BorderLayotu
返回10px
,如果JPanels被放置到NORTH,SOUTH,WEST,SOUTH区域,那么创建非常漂亮的10pxs EmptyBorders
要重写getPreferredSize
的JPanel
,同样的方式为需要在Swing绘画
不知道为什么你把JPanel
作为Renderers JComponent
放到JTree
,也许还有另外一种方式,确保在SSCCE
发布后能更快得到更好的帮助
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