我有一个JTree,我可以(ctrl)选择多个节点。 当我点击右键时,我会弹出一个可以选择'刷新'的弹出窗口。 (在这个网站上有其他问题可以解释如何做到这一点)jtree右键单击只选择一个节点
问题是,当我选择多个节点,我右键单击,只有右击节点被选中,其他人被取消选择。
我想选择3个节点(叶子),右键单击,选择'刷新',仍然有3个节点被选中。
有什么建议吗?谢谢!
例如:
import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
public class JTreeMultiSelect extends JFrame{
public JTreeMultiSelect() {
super("Test");
JTree myTree = new JTree();
myTree.getSelectionModel()
.setSelectionMode(TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);
// add MouseListener to tree
MouseAdapter ma = new MouseAdapter() {
private void myPopupEvent(MouseEvent e) {
int x = e.getX();
int y = e.getY();
JTree tree = (JTree)e.getSource();
TreePath path = tree.getPathForLocation(x, y);
if (path == null)
return;
tree.setSelectionPath(path);
DefaultMutableTreeNode rightClickedNode =
(DefaultMutableTreeNode)path.getLastPathComponent();
if(rightClickedNode.isLeaf()){
JPopupMenu popup = new JPopupMenu();
final JMenuItem refreshMenuItem = new JMenuItem("refresh");
refreshMenuItem.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent actionEvent) {
System.out.println("refresh!");
}
});
popup.add(refreshMenuItem);
popup.show(tree, x, y);
}
}
public void mousePressed(MouseEvent e) {
if (e.isPopupTrigger()) myPopupEvent(e);
}
public void mouseReleased(MouseEvent e) {
if (e.isPopupTrigger()) myPopupEvent(e);
}
};
myTree.addMouseListener(ma);
JPanel myPanel = new JPanel();
myPanel.add(myTree);
this.add(myPanel);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.pack();
this.setVisible(true);
}
public static void main(String[] args) {
new JTreeMultiSelect();
}
}
更快地发布[SSCCE](http://sscce.org/),简短,可运行,可编译,仅关于JFrame和JTree,添加了TreeSelectionListener,其选择模式,getSelectedXxx的代码以及如何调用JPopupMenu可见 – mKorbel
向我们显示代码!这听起来像你正在改变选择右键单击,但不能说,除非我看到一些代码。 – LiverpoolFTW
我添加了代码。它在tree.setSelectionPath(path); –