需求：使用FilteredTree实现一个下面这样的Dialog，要求Check框单选，即只能选择一个：当选择新的时候，旧的不选。说明：FilteredTree自带一个文本输入框。
1、自己的类继承org.eclipse.jface.dialogs.Dialog
2、在createDialogArea方法中实现自己的窗体：
protected Control createDialogArea(Composite parent) {
Composite composite = new Composite(parent,SWT.NULL);
composite.getShell().setText("****选择");
composite.setLayout(new GridLayout(1,false));
GridData compositeGridData = new GridData(GridData.FILL_BOTH);
composite.setLayoutData(compositeGridData);
Label title = new Label(composite,SWT.NONE);
title.setAlignment(SWT.LEFT);
title.setText("可选**信息");
title.setLayoutData(new GridData(SWT.LEFT,SWT.TOP,false,false,1,1));
ChooseProjectEntryFilteredTree filteredTree = new ChooseProjectEntryFilteredTree(
composite,
SWT.BORDER,
new ChooseProjectEntryPatternFilter(),
true);
this.treeViewer = filteredTree.getViewer();
//this.treeViewer.setUseHashlookup(true);
this.tree = this.treeViewer.getTree();
this.tree.setToolTipText("请输入***的关键词");
this.checkboxTreeViewer = new CheckboxTreeViewer(this.tree);
GridData gd = new GridData(SWT.FILL,SWT.FILL,true,false,1,1);
gd.heightHint = 250;
this.tree.setLayoutData(gd);
this.tree.setLinesVisible(true);
this.tree.setHeaderVisible(true);
TreeColumn funcDecl = new TreeColumn(this.tree,SWT.CENTER);
funcDecl.setText("****");
funcDecl.setWidth(240);
funcDecl.addSelectionListener(new SelectionAdapter() {
boolean sortType = true;
@Override
public void widgetSelected(SelectionEvent e) {
sortType = !sortType;
treeViewer.setSorter(sortType ? ChooseProjectEntrySorter.sorter
: ChooseProjectEntrySorter.reverseSorter);
}
});
TreeColumn file = new TreeColumn(this.tree,SWT.CENTER);
file.setText("****");
file.setWidth(270);
TreeColumn line = new TreeColumn(this.tree,SWT.CENTER);
line.setText("***");
line.setWidth(100);
treeViewer.setContentProvider(new ChooseProjectEntryContentProvider());
treeViewer.setLabelProvider(new ChooseProjectEntryLabelProvider());
treeViewer.setSorter(ChooseProjectEntrySorter.sorter);
treeViewer.setInput(manager);
this.selectedLabel = new Label(composite,SWT.NONE);
this.selectedLabel.setAlignment(SWT.LEFT);
GridData labelGd = new GridData(SWT.LEFT,SWT.TOP,true,false,1,1);
labelGd.widthHint = 380;
this.selectedLabel.setLayoutData(labelGd);
this.checkboxTreeViewer.addCheckStateListener(checkStateListener);
//this.treeViewer.addSelectionChangedListener(listener);
return null;
}
代码如下：
说明：
treeViewer.setContentProvider(new ChooseProjectEntryContentProvider());
treeViewer.setLabelProvider(new ChooseProjectEntryLabelProvider());
treeViewer.setSorter(ChooseProjectEntrySorter.sorter);
treeViewer.setInput(manager);
这里设置的是TreeViewer的content provider和label provider、sorter，所以并不能正常使用checkboxTreeViewer.setChecked()和setSubtreeChecked()，并不能像这个链接中那样设置指定行的checked状态为false，所以需要使用下面的方法：
1）、checkboxTreeViewer监听事件：
/**
* 单选表格
*/
private ICheckStateListener checkStateListener = new ICheckStateListener(){
@Override
public void checkStateChanged(CheckStateChangedEvent event) {
if (event.getChecked()) {
setAllCheckedFalse();
//checkboxTreeViewer.setChecked(getTreeItem(event.getElement()), true);
checkFunc = (FuncItem)(event.getElement());
TreeItem item = getTreeItem(checkFunc);
if(item != null){
item.setChecked(true);
}
selectedLabel.setText("已选**：" + checkFunc.***);
}else{
checkFunc = null;
} treeViewer.refresh();
} };
代码如下：
2）、设置所有checked的行为unchecked状态：
/**
* 设置所有被checked的选项unchecked
*/
private void setAllCheckedFalse(){
TreeItem[] items = this.tree.getItems(); if(items.length > 0){
for(int i = 0; i < items.length; i ++){
TreeItem item = items[i];
item.setChecked(false);
}
}
}
代码如下：
3）、getTreeItem函数：
private TreeItem getTreeItem(FuncItem element){
TreeItem[] items = this.tree.getItems();
if(items.length > 0){
for(int i = 0; i < items.length; i ++){
TreeItem item = items[i];
if(element.equals((FuncItem)item.getData())){
return item;
}
}
}
return null;
}
代码如下：
3、贴一下ChooseProjectEntryFilteredTree的代码
/**
* 自行导入需要的包
*/
public class ChooseProjectEntryFilteredTree extends FilteredTree { public ChooseProjectEntryFilteredTree(Composite parent, int treeStyle,
PatternFilter filter, boolean useNewLook) {
super(parent, treeStyle, filter, useNewLook);
} @Override
protected TreeViewer doCreateTreeViewer(Composite parent, int style) {
return super.doCreateTreeViewer(parent, SWT.CHECK | SWT.SINGLE | SWT.BORDER
| SWT.V_SCROLL | SWT.H_SCROLL);
} }
代码如下：
4、贴一下ChooseProjectEntryPatternFilter的代码
public class ChooseProjectEntryPatternFilter extends PatternFilter {
@Override
protected boolean isLeafMatch(Viewer viewer, Object element) {
TreeViewer treeViewer = (TreeViewer) viewer;
int numberOfColumns = treeViewer.getTree().getColumnCount();
ITableLabelProvider labelProvider = (ITableLabelProvider) treeViewer
.getLabelProvider();
boolean isMatch = false;
for (int columnIndex = 0; columnIndex < numberOfColumns; columnIndex++) {
String labelText = labelProvider
.getColumnText(element, columnIndex);
isMatch |= wordMatches(labelText);
}
return isMatch;
}
}
代码如下：
ChooseProjectEntryContentProvider、ChooseProjectEntryLabelProvider、ChooseProjectEntrySorter跟一般的TreeViewer差不多，
这里再贴ChooseProjectEntryLabelProvider的部分代码：
public class ChooseProjectEntryLabelProvider extends LabelProvider implements ITableLabelProvider{
@Override
public Image getColumnImage(Object element, int columnIndex) {
return null;
}
@Override
public String getColumnText(Object element, int columnIndex) {
if(element instanceof FuncItem){
FuncItem func = (FuncItem)element;
switch(columnIndex){
case 0:
return func.***;
case 1:
return func.***;
case 2:
return String.valueOf(func.***);
default:
return "";
}
}
return getText(element);
}
}
代码如下
注意这里实现的是ITableLabelProvider接口。
我自己用checkboxTreeViewer.setChecked(element, state)无法设置event.getElement()【checkStateChanged方法中】元素的状态，
但是使用checkboxTreeViewer.setAllChecked(state)可以设置所有元素的状态为checked或者unchecked，
没办法，我又需要使用FilteredTree，又无法使用setChecked办法设置指定元素状态（我单步调试进入setChecked方法里面看了看，应该是event.getElement()元素的问题），只好想出上面的馊办法，希望对读者有用。