java JTree JCheckBox树复选框详解
本文实例为大家分享了javaJTreeJCheckBox树复选框展示的具体代码，供大家参考，具体内容如下
1.CheckTreeManager.java
publicclassCheckTreeManagerextendsMouseAdapterimplementsTreeSelectionListener
{
privateCheckTreeSelectionModelselectionModel=null;
//privateJTreetree=newJTree();
privateJTreetree=null;
inthotspot=newJCheckBox().getPreferredSize().width;
publicCheckTreeManager(JTreetree)
{
this.tree=tree;
selectionModel=newCheckTreeSelectionModel(tree.getModel());
tree.setCellRenderer(newCheckTreeCellRenderer(tree.getCellRenderer(),selectionModel));
tree.addMouseListener(this);//鼠标监听
selectionModel.addTreeSelectionListener(this);//树选择监听
}
publicvoidmouseClicked(MouseEventme)
{
TreePathpath=tree.getPathForLocation(me.getX(),me.getY());
if(path==null)
return;
if(me.getX()>tree.getPathBounds(path).x+hotspot)
return;
booleanselected=selectionModel.isPathSelected(path,true);
selectionModel.removeTreeSelectionListener(this);
try
{
if(selected)
selectionModel.removeSelectionPath(path);
else
selectionModel.addSelectionPath(path);
}
finally
{
selectionModel.addTreeSelectionListener(this);
tree.treeDidChange();
}
}
publicCheckTreeSelectionModelgetSelectionModel()
{
returnselectionModel;
}
publicvoidvalueChanged(TreeSelectionEvente)
{
tree.treeDidChange();
}
}
2.CheckTreeSelectionModel.java
publicclassCheckTreeSelectionModelextendsDefaultTreeSelectionModel
{
privateTreeModelmodel;
publicCheckTreeSelectionModel(TreeModelmodel)
{
this.model=model;
setSelectionMode(TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);
}
//testswhetherthereisanyunselectednodeinthesubtreeofgivenpath
publicbooleanisPartiallySelected(TreePathpath){
if(isPathSelected(path,true))
returnfalse;
TreePath[]selectionPaths=getSelectionPaths();
if(selectionPaths==null)
returnfalse;
for(intj=0;j
3.CheckTreeCellRenderer.java
publicclassCheckTreeCellRendererextendsJPanelimplementsTreeCellRenderer
{
privateCheckTreeSelectionModelselectionModel;
privateTreeCellRendererdelegate;
//privateTristateCheckBoxcheckBox=newTristateCheckBox();
privateJCheckBoxcheckBox=newJCheckBox();
publicCheckTreeCellRenderer(TreeCellRendererdelegate,CheckTreeSelectionModelselectionModel){
this.delegate=delegate;
this.selectionModel=selectionModel;
setLayout(newBorderLayout());
setOpaque(false);
checkBox.setOpaque(false);
}
publicComponentgetTreeCellRendererComponent(JTreetree,Objectvalue,booleanselected,booleanexpanded,booleanleaf,introw,booleanhasFocus){
Componentrenderer=delegate.getTreeCellRendererComponent(tree,value,selected,expanded,leaf,row,hasFocus);
TreePathpath=tree.getPathForRow(row);
if(path!=null)
{
System.out.println(path);
if(selectionModel.isPathSelected(path,true))
checkBox.setSelected(true);
else
{
System.out.println(selectionModel.isPartiallySelected(path));
checkBox.setSelected(selectionModel.isPartiallySelected(path)?true:false);
}
}
removeAll();
add(checkBox,BorderLayout.WEST);
add(renderer,BorderLayout.CENTER);
returnthis;
}
}
4.用法
CheckTreeManagercheckTreeManager=newCheckTreeManager(jTree);
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。