JTree绘制的问题

zombieLi 2003-10-16 03:59:47

怎样使JTree的每一个节点的高度都不一致呀。紧急求助

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zombieLi 2003-10-16

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多谢，我昨天重新写了IconNodeRenderer的setPreferredSize，但是好像没有起作用。
回去再试试，马上给分

pxboy 2003-10-16

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注意
this.setPreferredSize(new java.awt.Dimension(100, 10));
这里

pxboy 2003-10-16

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怎么我的代码到这里来了？我再贴一次吧

package common.tree;

import java.awt.Component;
import javax.swing.Icon;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.plaf.metal.MetalIconFactory;
import common.render.TreeNode;

/**
* 树图标
*/
public class IconNodeRenderer
extends DefaultTreeCellRenderer
{

/** 有叶子节点的图标 */
public static final Icon FOLDER_ICON = common.Transfer.getAppIcon("resource/folder.gif");

/** 叶子节点的图标*/
public static final Icon LEAF_ICON = common.Transfer.getAppIcon("resource/leaf.gif");

/** 节点打开时的图标*/
public static final Icon EXPANDED_ICON = common.Transfer.getAppIcon("resource/expanded.gif");

public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean sel, boolean expanded, boolean leaf,
int row, boolean hasFocus)
{

super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);

TreeNode node = (TreeNode)value;

//判断节点是否已设置图标
Icon icon = node.getIcon();

if (icon == null)
{
if (expanded)
{
setIcon(EXPANDED_ICON);
this.setPreferredSize(new java.awt.Dimension(100, 10));
}
else if (!leaf)
{
setIcon(FOLDER_ICON);
this.setPreferredSize(new java.awt.Dimension(100, 30));
}
else
{
this.setPreferredSize(new java.awt.Dimension(100, 50));
setIcon(LEAF_ICON);
}
}
else
{
setIcon(icon);
}

return this;
}

}

zombieLi 2003-10-16

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这样不行 icon如果太大了不能显示全的

mtou 2003-10-16

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package common.tree;

import java.awt.Component;
import javax.swing.Icon;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.plaf.metal.MetalIconFactory;

/**
* 树图标
*/
public class IconNodeRenderer extends DefaultTreeCellRenderer {

/** 有叶子节点的图标 */
public static final Icon FOLDER_ICON=common.Transfer.getAppIcon("resource/folder.gif");

/** 叶子节点的图标*/
public static final Icon LEAF_ICON=common.Transfer.getAppIcon("resource/leaf.gif");

/** 节点打开时的图标*/
public static final Icon EXPANDED_ICON=common.Transfer.getAppIcon("resource/expanded.gif");

public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean sel, boolean expanded, boolean leaf,
int row, boolean hasFocus) {

super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);

TreeNode node=(TreeNode)value;

//判断节点是否已设置图标
Icon icon = node.getIcon();

if (icon == null) {
if(expanded)
setIcon(EXPANDED_ICON);
else if(!leaf)
setIcon(FOLDER_ICON);
else
setIcon(LEAF_ICON);
} else {
setIcon(icon);
}

return this;
}

}

zombieLi 2003-10-16