如何调整JTree中JCheckBox类型节点宽度以使节点文字全部显示？
JTree+JCheckBox.
树节点是复选框，初始字体是默认，在选中后变为Bold。但这样JCheckBox的文字变宽，就会被裁掉一部分显示成省略号。在选中时调整继承了JCheckBox的TreeCellRenderer的size（setsize）没有作用。
如何调整是的文字不被裁掉？
多谢
问题点数：30、回复次数：4Top
1 楼tongping（侧耳倾听）回复于 2005-06-02 20:30:16 得分 0
哪位大虾指点一下？Top
2 楼gtlang78（）回复于 2005-06-02 21:09:01 得分 30
import java.awt.*;
import javax.swing.*;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellRenderer;
public class TreeCellRendererTest {
public static void main(String[] args) {
JTree tree = new JTree();
tree.setCellRenderer(new TestRenderer());
JScrollPane sp = new JScrollPane(tree);
JFrame f = new JFrame();
f.getContentPane().add(sp, BorderLayout.CENTER);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(800, 600);
f.setLocationRelativeTo(null);
f.show();
}
private static class TestRenderer extends DefaultTreeCellRenderer
implements TreeCellRenderer {
private Font boldFont = null;
private Font font = null;
public Component getTreeCellRendererComponent(
JTree tree, Object value, boolean selected,
boolean expanded, boolean leaf, int row, boolean hasFocus) {
super.getTreeCellRendererComponent(
tree, value, selected, expanded, leaf, row, hasFocus);
if (font == null) {
font = getFont().deriveFont(Font.PLAIN);
boldFont = getFont().deriveFont(Font.BOLD);
}
if (selected == true) {
setFont(boldFont);
}
else {
setFont(font);
}
return this;
}
public Dimension getPreferredSize() {
Font oldFont = getFont();
setFont(oldFont.deriveFont(Font.BOLD));
Dimension d = super.getPreferredSize();
setFont(oldFont);
return d;
}
}
}
Top
3 楼huhumyjava（楼梯口）回复于 2005-06-03 08:53:22 得分 0
搂主，JTree+JCheckBox的方法代码，能否贴出来共享一下Top
4 楼tongping（侧耳倾听）回复于 2005-06-03 10:14:13 得分 0
public class CheckBoxRenderer extends JCheckBox implements TreeCellRenderer {
private Map fontsMap = new HashMap();
private Map colorsMap = new HashMap();
private final static String FONT_BOLD = "boldfont";
private final static String FONT_ITALIC = "italicfont";
private final static String FONT_DEFAULT = "plainfont";
private final static String COLOR_RED = "redcolor";
private final static String COLOR_BLACK = "blackcolor";
private final static String COLOR_BLUE = "bluecolor";
private final static String COLOR_PARTIALSELECTED = "graycolor";
private void loadColors() {
colorsMap.put(CheckRenderer.COLOR_BLACK, Color.BLACK);
colorsMap.put(CheckRenderer.COLOR_RED, Color.RED);
colorsMap.put(CheckRenderer.COLOR_BLUE, Color.BLUE);
colorsMap.put(CheckRenderer.COLOR_PARTIALSELECTED, new Color(0,0,160));
}
private void loadFonts() {
fontsMap.put(CheckRenderer.FONT_DEFAULT, new Font("Arial", Font.PLAIN,
11));
fontsMap.put(CheckRenderer.FONT_BOLD, new Font("Arial", Font.BOLD, 11));
}
public CheckRenderer() {
loadFonts();
loadColors();
}
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
String stringValue = tree.convertValueToText(value, selected, expanded,
leaf, row, hasFocus);
PlanTreeNode node = (PlanTreeNode) value;
if (hasFocus) {
this.setBackground(UIManager.getColor("Tree.selectionBackground"));
setFont((Font) fontsMap.get(CheckRenderer.FONT_BOLD));
} else {
this.setBackground(tree.getBackground());
setFont((Font) fontsMap.get(CheckRenderer.FONT_DEFAULT));
}
return this;
}
public Dimension getPreferredSize(){
Font oldFont = getFont();
setFont((Font)fontsMap.get(FONT_BOLD));
Dimension d = super.getPreferredSize();
setFont(oldFont);
return d;
}
}Top
