编辑树单元时,Java JTree自定义图标变回默认图标
在我的代码中,我自定义了一个编辑树单元时,Java JTree自定义图标变回默认图标,java,swing,icons,jtree,treecellrenderer,Java,Swing,Icons,Jtree,Treecellrenderer,在我的代码中,我自定义了一个DefaultTreeCellRenderer,为我的节点提供了一个自定义图标 setCellRenderer(new DefaultTreeCellRenderer() { private static final long serialVersionUID = -2839238218110688876L; private ImageIcon icon = myIcon; @Override
DefaultTreeCellRenderer
,为我的节点提供了一个自定义图标
setCellRenderer(new DefaultTreeCellRenderer() {
private static final long serialVersionUID = -2839238218110688876L;
private ImageIcon icon = myIcon;
@Override
public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean isLeaf, int row, boolean focused) {
super.getTreeCellRendererComponent(tree, value, selected, expanded, isLeaf, row, hasFocus);
Component c = super.getTreeCellRendererComponent(tree, value, selected, expanded, isLeaf, row, focused);
setIcon(icon);
return c;
}
});
在我使我的树可编辑以便用户可以编辑节点标识符之前,所有这些都工作得很好。现在,在编辑节点时,图标切换回默认值。似乎编辑树单元渲染器与我编写的不同。有人知道如何解决这个问题吗?使用
DefaultTreeCellRenderer
的setLeafIcon(图标)
、setOpenIcon(图标)
和setClosedIcon(图标)
方法可能更简单
您使用的是什么
TreeCellEditor
?我没有使用TreeCellEditor。可能是重复的
import java.awt.*;
import javax.swing.*;
import javax.swing.tree.*;
public class TreeIconTest {
private final Icon icon = new Icon() {
@Override public void paintIcon(Component c, Graphics g, int x, int y) {
Graphics2D g2 = (Graphics2D) g.create();
g2.translate(x, y);
g2.setPaint(Color.RED);
g2.fillRect(1, 1, getIconWidth() - 2, getIconHeight() - 2);
g2.dispose();
}
@Override public int getIconWidth() {
return 16;
}
@Override public int getIconHeight() {
return 16;
}
};
public JComponent makeUI() {
JTree tree1 = new JTree();
tree1.setEditable(true);
tree1.setCellRenderer(new DefaultTreeCellRenderer() {
@Override
public Component getTreeCellRendererComponent(
JTree tree, Object value, boolean selected, boolean expanded,
boolean isLeaf, int row, boolean focused) {
JLabel c = (JLabel) super.getTreeCellRendererComponent(
tree, value, selected, expanded, isLeaf, row, focused);
c.setIcon(icon);
return c;
}
});
JTree tree2 = new JTree();
tree2.setEditable(true);
DefaultTreeCellRenderer renderer2 = new DefaultTreeCellRenderer();
renderer2.setOpenIcon(icon);
renderer2.setClosedIcon(icon);
renderer2.setLeafIcon(icon);
tree2.setCellRenderer(renderer2);
JTree tree3 = new JTree();
tree3.setEditable(true);
tree3.setCellRenderer(new DefaultTreeCellRenderer() {
@Override public Icon getOpenIcon() {
return icon;
}
@Override public Icon getClosedIcon() {
return icon;
}
@Override public Icon getLeafIcon() {
return icon;
}
});
tree3.setCellEditor(new DefaultTreeCellEditor(
tree3, (DefaultTreeCellRenderer) tree3.getCellRenderer()));
JPanel p = new JPanel(new GridLayout(1, 3));
p.add(new JScrollPane(tree1));
p.add(new JScrollPane(tree2));
p.add(new JScrollPane(tree3));
return p;
}
public static void main(String... args) {
EventQueue.invokeLater(() -> {
JFrame f = new JFrame();
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.getContentPane().add(new TreeIconTest().makeUI());
f.setSize(320, 240);
f.setLocationRelativeTo(null);
f.setVisible(true);
});
}
}