jface的CheckboxTreeViewer实现单选

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：

 1 protected Control createDialogArea(Composite parent) {
 2         Composite composite = new Composite(parent,SWT.NULL);
 3         composite.getShell().setText("****选择");
 4         
 5         composite.setLayout(new GridLayout(1,false));
 6         GridData compositeGridData = new GridData(GridData.FILL_BOTH);
 7         composite.setLayoutData(compositeGridData);
 8         
 9         Label title = new Label(composite,SWT.NONE);
10         title.setAlignment(SWT.LEFT);
11         title.setText("可选**信息");
12         title.setLayoutData(new GridData(SWT.LEFT,SWT.TOP,false,false,1,1));
13         
14         ChooseProjectEntryFilteredTree filteredTree = new ChooseProjectEntryFilteredTree(
15                 composite,
16                 SWT.BORDER,
17                 new ChooseProjectEntryPatternFilter(),
18                 true);
19         this.treeViewer = filteredTree.getViewer();
20         //this.treeViewer.setUseHashlookup(true);
21         
22         this.tree = this.treeViewer.getTree();
23         this.tree.setToolTipText("请输入***的关键词");
24         
25         this.checkboxTreeViewer = new CheckboxTreeViewer(this.tree);
26         
27         GridData gd = new GridData(SWT.FILL,SWT.FILL,true,false,1,1);
28         gd.heightHint = 250;
29         this.tree.setLayoutData(gd);
30         this.tree.setLinesVisible(true);
31         this.tree.setHeaderVisible(true);
32         
33         TreeColumn funcDecl = new TreeColumn(this.tree,SWT.CENTER);
34         funcDecl.setText("****");
35         funcDecl.setWidth(240);
36         funcDecl.addSelectionListener(new SelectionAdapter() {
37             boolean sortType = true;
38 
39             @Override
40             public void widgetSelected(SelectionEvent e) {
41                 sortType = !sortType;
42                 treeViewer.setSorter(sortType ? ChooseProjectEntrySorter.sorter
43                         : ChooseProjectEntrySorter.reverseSorter);
44             }
45             
46             
47         });
48         
49         TreeColumn file = new TreeColumn(this.tree,SWT.CENTER);
50         file.setText("****");
51         file.setWidth(270);
52         
53         TreeColumn line = new TreeColumn(this.tree,SWT.CENTER);
54         line.setText("***");
55         line.setWidth(100);
56         
57         treeViewer.setContentProvider(new ChooseProjectEntryContentProvider());
58         treeViewer.setLabelProvider(new ChooseProjectEntryLabelProvider());
59         treeViewer.setSorter(ChooseProjectEntrySorter.sorter);
60         treeViewer.setInput(manager);
61         
62         this.selectedLabel = new Label(composite,SWT.NONE);
63         this.selectedLabel.setAlignment(SWT.LEFT);
64         GridData labelGd = new GridData(SWT.LEFT,SWT.TOP,true,false,1,1);
65         labelGd.widthHint = 380;
66         this.selectedLabel.setLayoutData(labelGd);
67         
68         this.checkboxTreeViewer.addCheckStateListener(checkStateListener);
69         
70         //this.treeViewer.addSelectionChangedListener(listener);
71         return null;
72     }

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：

 1     /**
 2      * 单选表格
 3      */
 4     private ICheckStateListener checkStateListener = new ICheckStateListener(){
 5         @Override
 6         public void checkStateChanged(CheckStateChangedEvent event) {
 7             if (event.getChecked()) {
 8                 setAllCheckedFalse();
 9                 //checkboxTreeViewer.setChecked(getTreeItem(event.getElement()), true);
10                 checkFunc = (FuncItem)(event.getElement());
11                 TreeItem item = getTreeItem(checkFunc);
12                 if(item != null){
13                     item.setChecked(true);
14                 }
15                 selectedLabel.setText("已选**：" + checkFunc.***);
16             }else{
17                 checkFunc = null;
18             }
19             
20             treeViewer.refresh();
21         }
22         
23     };

代码如下：

2）、设置所有checked的行为unchecked状态：

 1 /**
 2      * 设置所有被checked的选项unchecked
 3      */
 4     private void setAllCheckedFalse(){
 5         TreeItem[] items = this.tree.getItems();
 6         
 7         if(items.length > 0){
 8             for(int i = 0; i < items.length; i ++){
 9                 TreeItem item = items[i];
10                 item.setChecked(false);
11             }
12         }
13     }

代码如下：

3）、getTreeItem函数：

 1 private TreeItem getTreeItem(FuncItem element){
 2         TreeItem[] items = this.tree.getItems();
 3         
 4         if(items.length > 0){
 5             for(int i = 0; i < items.length; i ++){
 6                 TreeItem item = items[i];
 7                 if(element.equals((FuncItem)item.getData())){
 8                     return item;
 9                 }
10             }
11         }
12         
13         return null;
14     }

代码如下：

3、贴一下ChooseProjectEntryFilteredTree的代码

 1 /**
 2  * 自行导入需要的包
 3  */
 4 public class ChooseProjectEntryFilteredTree extends FilteredTree {
 5 
 6     public ChooseProjectEntryFilteredTree(Composite parent, int treeStyle,
 7             PatternFilter filter, boolean useNewLook) {
 8         super(parent, treeStyle, filter, useNewLook);
 9     }
10 
11     @Override
12     protected TreeViewer doCreateTreeViewer(Composite parent, int style) {
13         return super.doCreateTreeViewer(parent, SWT.CHECK | SWT.SINGLE | SWT.BORDER
14                 | SWT.V_SCROLL | SWT.H_SCROLL);
15     }
16 
17     
18 }

代码如下：

4、贴一下ChooseProjectEntryPatternFilter的代码

 1 public class ChooseProjectEntryPatternFilter extends PatternFilter {
 2 
 3     @Override
 4     protected boolean isLeafMatch(Viewer viewer, Object element) {
 5         TreeViewer treeViewer = (TreeViewer) viewer;
 6         
 7         int numberOfColumns = treeViewer.getTree().getColumnCount();
 8         
 9         ITableLabelProvider labelProvider = (ITableLabelProvider) treeViewer
10                 .getLabelProvider();
11         
12         boolean isMatch = false;
13         
14         for (int columnIndex = 0; columnIndex < numberOfColumns; columnIndex++) {
15             String labelText = labelProvider
16                     .getColumnText(element, columnIndex);
17             isMatch |= wordMatches(labelText);
18         }
19         
20         return isMatch;
21     }
22     
23 }

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：

 1 public class ChooseProjectEntryLabelProvider extends LabelProvider implements ITableLabelProvider{
 2 
 3     @Override
 4     public Image getColumnImage(Object element, int columnIndex) {
 5         return null;
 6     }
 7 
 8     @Override
 9     public String getColumnText(Object element, int columnIndex) {
10         
11         if(element instanceof FuncItem){
12             FuncItem func = (FuncItem)element;
13             switch(columnIndex){
14             case 0:
15                 return func.***;
16             case 1:
17                 return func.***;
18             case 2:
19                 return String.valueOf(func.***);
20             default:
21                 return "";    
22             }
23         }
24         
25         return getText(element);
26     }
27 
28     
29 }

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。

posted on 2015-12-22 20:04 Shirlies 阅读(1071) 评论(1) 编辑收藏举报