jtree根据不同类型节点定制图标

最新推荐文章于 2022-08-16 14:33:21 发布

xiaohai0504

最新推荐文章于 2022-08-16 14:33:21 发布

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分类专栏： jtree 文章标签： constructor object import tree class

本文链接：https://blog.youkuaiyun.com/xiaohai0504/article/details/4664133

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1 篇文章

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本文介绍如何自定义Java Swing中的树节点类AlarmDefaultMutableTreeNode及其渲染器AlarmDefaultTreeCellRenderer，通过设置不同类型的图标来区分树结构中的省份、区域及设施等层级。

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=====1自定义 AlarmDefaultMutableTreeNode extends DefaultMutableTreeNode=====

import java.io.Serializable;

import javax.swing.tree.DefaultMutableTreeNode;

public class AlarmDefaultMutableTreeNode extends DefaultMutableTreeNode implements Serializable {
private static final long serialVersionUID = 1L;

private int nodeType;

public AlarmDefaultMutableTreeNode() {
super();
// TODO Auto-generated constructor stub
}

public AlarmDefaultMutableTreeNode(Object arg0, boolean arg1) {
super(arg0, arg1);
// TODO Auto-generated constructor stub
}

public AlarmDefaultMutableTreeNode(Object arg0) {
super(arg0);
// TODO Auto-generated constructor stub
}

public void setTreeNodeType(int type) {
this.nodeType = type;
}

public int getTreeNodeType() {
return this.nodeType;
}
}

=====2自定义 AlarmDefaultTreeCellRenderer extends DefaultTreeCellRenderer =========

import java.awt.Component;

import javax.swing.ImageIcon;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;

/**
* @author hcc
*
*/
public class AlarmDefaultTreeCellRenderer extends DefaultTreeCellRenderer {
private static final long serialVersionUID = 1L;

public AlarmDefaultTreeCellRenderer() {
super();
}

@Override
public Component getTreeCellRendererComponent(JTree tree, Object value,
   boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
  // TODO Auto-generated method stub
  super.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus);

  AlarmDefaultMutableTreeNode treeNode = (AlarmDefaultMutableTreeNode)value;

  int type = treeNode.getTreeNodeType();
  switch (type) {
   case 1:
    this.setIcon(new ImageIcon(getClass().getResource("/images/072.gif")));
    break;
   case 2:
    this.setIcon(new ImageIcon(getClass().getResource("/images/zoomup.gif")));
    break;
   case 3:
    this.setIcon(new ImageIcon(getClass().getResource("/images/trend.gif")));
    break;
   default:
    break;
  }

  return this;
}
}

=====3 应用 ========

EpProvince province = initFacilities();
  AlarmDefaultMutableTreeNode top = new AlarmDefaultMutableTreeNode(
    province.getProvinceName());
  AlarmDefaultMutableTreeNode zoneNode = null;
  AlarmDefaultMutableTreeNode indNode = null;
  AlarmDefaultMutableTreeNode facNode = null;

  Set<EpZone> zones = province.getEpZones();
  for (EpZone zone : zones) {
   zoneNode = new AlarmDefaultMutableTreeNode(zone.getZoneName());
   zoneNode.setTreeNodeType(1);
   top.add(zoneNode);

   Set<EpIndustry> industrys = zone.getEpIndustries();
   for (EpIndustry industry : industrys) {
    indNode = new AlarmDefaultMutableTreeNode(industry.getIndustryName());
    indNode.setTreeNodeType(2);
    zoneNode.add(indNode);

    Set<EpFacilities> facilities = industry.getEpFacilitieses();
    for (EpFacilities fac : facilities) {
     facNode = new AlarmDefaultMutableTreeNode(fac
       .getFacilitiesName());
     facNode.setTreeNodeType(3);
     indNode.add(facNode);
    }
   }
  }

  jTree = new JTree(top) {
   public Insets getInsets() {
    return new Insets(5, 5, 5, 5);
   }
  };

  jTree.addTreeSelectionListener(new TreeSelectionListener() {
   public void valueChanged(TreeSelectionEvent e) {
       TreePath newLeadPath = e.getNewLeadSelectionPath();
   }
  });

jTree.setCellRenderer(new AlarmDefaultTreeCellRenderer());

jTree.setEditable(false);
jScrollPane1.setViewportView(jTree);