我在使用TreeView时遇到了很多麻烦,更具体地说明了每个节点显示的文本。
从树的初始化程序开始,我希望单个节点带有文本,这可能会使程序对用户更直观:
private void defineEmpityTree(){
cbt.setModel(new DefaultTreeModel(
new DefaultMutableTreeNode("Relat\u00F3rios Individuais") {
{
}
}
));
}
我添加初始化树:
cbt = new JCheckBoxTree();
defineEmpityTree();
scrollPane.setViewportView(cbt);
"Relatórios Individuais" aren't shown, Tree Ok, another bug
我忽略了这个问题并继续实际填充节点,用户指定他的搜索并按下" ok",当我们得到树填充的第二张图像时。
然后又出现了另一个奇怪的问题,如果" ok"再次按下,有些文字变得奇怪,第3张图片。
继承人创建节点的部分。对于为每种类型的报告和每个报告批次创建的文件数组,它并不重要。
private void defineNewTree(ArrayList<File> files){
DefaultMutableTreeNode dmtRoot = new DefaultMutableTreeNode("Relat\u00F3rios Individuais");
DefaultMutableTreeNode dmtSubFolder = null;
DefaultMutableTreeNode dmtLotFolder = null;
int childsRoot = 0;
int childsSub = 0;
for(File f : files){
String subFolder = f.getName().substring(17,f.getName().length()-4);
String name = f.getName();
String lot = f.getName().substring(0, 3);
childsRoot = dmtRoot.getChildCount();
boolean subFoldExists = false;
boolean foldLotExists = false;
//creatingo folder reports:
for(int i = 0;i<childsRoot;i++){
if(dmtRoot.getChildAt(i).toString().equals(subFolder)){
dmtSubFolder = (DefaultMutableTreeNode) dmtRoot.getChildAt(i);
subFoldExists = true;
i=childsRoot;
}
}
if(!subFoldExists){
dmtSubFolder = new DefaultMutableTreeNode(subFolder);
dmtRoot.add(dmtSubFolder);
}
for(int j = 0;j<childsSub;j++){
if(dmtSubFolder.getChildAt(j).toString().equals(lot)){
dmtLotFolder = (DefaultMutableTreeNode) dmtSubFolder.getChildAt(j);
foldLotExists = true;
j=childsSub;
}
}
if(!foldLotExists){
dmtLotFolder = new DefaultMutableTreeNode("lote "+lot);
dmtSubFolder.add(dmtLotFolder);
}
dmtLotFolder.add(new DefaultMutableTreeNode(name));
}
DefaultTreeModel myTree = new DefaultTreeModel(dmtRoot);
cbt.setModel(myTree);
}
我认为真正的问题是:
cbt.setModel(myTree);
这是定义Tree内容的正确方法吗?
编辑.: 按钮确定:
...
JButton btnOk = new JButton("OK");
btnOk.setBounds(161, 37, 49, 23);
btnOk.setActionCommand("ok");
btnOk.addActionListener(buttonListener);
panel.add(btnOk);
...
class ButtonListener implements ActionListener{
@Override
public void actionPerformed(ActionEvent a) {
switch(a.getActionCommand()){
case "ok":
search();
self.requestFocusInWindow();
break;
case "cancel":
dispose();
break;
case "print":
TreePath[] tp = cbt.getCheckedPaths();
for(TreePath t : tp){
System.out.println(t.getLastPathComponent().toString());
}
self.requestFocusInWindow();
break;
default:
break;
}
}
}
private void search(){
FileSeeker fs = new FileSeeker(textField.getText());
ArrayList<File> files = fs.getFiles();
defineNewTree(files);
}
编辑.: CheckBoxCellRenderer:
private class CheckBoxCellRenderer extends JPanel implements TreeCellRenderer {
private static final long serialVersionUID = -7341833835878991719L;
JCheckBox checkBox;
public CheckBoxCellRenderer() {
super();
this.setLayout(new BorderLayout());
checkBox = new JCheckBox();
add(checkBox, BorderLayout.CENTER);
setOpaque(false);
}
@Override
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
DefaultMutableTreeNode node = (DefaultMutableTreeNode)value;
Object obj = node.getUserObject();
TreePath tp = new TreePath(node.getPath());
CheckedNode cn = nodesCheckingState.get(tp);
if (cn == null) {
return this;
}
checkBox.setSelected(cn.isSelected);
checkBox.setText(obj.toString());
checkBox.setOpaque(cn.isSelected && cn.hasChildren && ! cn.allChildrenSelected);
return this;
}
}
答案 0 :(得分:0)
因此,对于第一个问题,解决方案是:
private void defineEmpityTree(){
DefaultMutableTreeNode dmtn = new DefaultMutableTreeNode("Relat\u00F3rios Individuais");
cbt.setModel(new DefaultTreeModel(dmtn));
((DefaultTreeModel) cbt.getModel()).nodeChanged(dmtn);
}
我只需通知节点已更改。
对于截断问题,
cbt.setLargeModel(true);
做了这个伎俩。