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我渲染了一个复选框节点树。 渲染器使用(复选框+文件夹如图标)和叶节点(仅复选框)呈现父节点。编辑器为相应的渲染器,复选框节点树
我已经呈现它,现在我想让它可编辑。 (即)当我点击它时,复选框必须选中并取消选中。
我试着写一个编辑器。但我不清楚如何编写它。请指导我如何做到这一点。
非常感谢提前。
我已经从Vector构建了树。该向量称为NamedVector,它包含父节点对象。父节点对象保存叶节点。叶节点的类型是CheckBoxNode。
public class CheckBoxNodeRenderer implements TreeCellRenderer{
NonLeafRenderer nonLeafRenderer = new NonLeafRenderer();
protected JCheckBox check;
protected JLabel label;
public JPanel panel;
CheckBoxNode checkNode;
public JCheckBox getLeafRenderer()
{
return leafRenderer;
}
public CheckBoxNodeRenderer()
{
panel = new JPanel();
panel.setLayout(new BorderLayout());
check = new JCheckBox();
label = new JLabel();
Font fontValue;
fontValue = UIManager.getFont("Tree.font");
if (fontValue != null) {
leafRenderer.setFont(fontValue);
}
Boolean booleanValue = (Boolean) UIManager
.get("Tree.drawsFocusBorderAroundIcon");
leafRenderer.setFocusPainted((booleanValue != null)
&& (booleanValue.booleanValue()));
selectionBorderColor = UIManager.getColor("Tree.selectionBorderColor");
selectionForeground = UIManager.getColor("Tree.selectionForeground");
selectionBackground = UIManager.getColor("Tree.selectionBackground");
textForeground = UIManager.getColor("Tree.textForeground");
textBackground = UIManager.getColor("Tree.textBackground");
}
///////////////////
/**
* Approach by returning a panel .
*/
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean isSelected, boolean expanded,
boolean leaf, int row, boolean hasFocus) {
String stringValue = tree.convertValueToText(value, isSelected,
expanded, leaf, row, hasFocus);
panel.setEnabled(true);
if(leaf){
if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
DefaultMutableTreeNode node = (DefaultMutableTreeNode)value;
checkNode = (CheckBoxNode)node.getUserObject();
check.setSelected(checkNode.isSelected());
label.setFont(tree.getFont());
label.setText(value.toString());
label.setIcon(null);
panel.removeAll();
panel.add(check,BorderLayout.WEST);
panel.add(label);
panel.setVisible(true);
}
}
else if(!leaf){
if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
DefaultMutableTreeNode node = (DefaultMutableTreeNode)value;
Object parent = (Object)node.getUserObject();
System.err.println(parent.toString());
NamedVector parentNode = (NamedVector) parent;
check.setSelected(parentNode.isSelected());
label.setFont(tree.getFont());
label.setText(parentNode.toString());
label.setIcon(UIManager.getIcon("Tree.openIcon"));
panel.removeAll();
panel.add(check,BorderLayout.WEST);
panel.add(label);
panel.setVisible(true);
}
}
return panel;
}
我试过了,并且再次得到相同的结果。没有发生 。 – Achilles 2012-02-07 03:47:24
你有没有试过扩展DefaultTreeCellRenderer?我通常这样做,而不是实现TreeCellRenderer接口,给你很多免费的。我基本上做了一些与你所拥有的非常相似的东西,这对我来说很有用。子类与界面是唯一的区别。 – Michael 2012-02-07 03:53:22
但defaultTreeCellRenderer将父节点呈现为一个图标。我想要复选框和父节点的图标。这就是我去自定义渲染器的原因。 – Achilles 2012-02-07 03:55:31