我正在尝试复制类似于此的用户界面:
http://librixxxi.blogspot.com/2011/06/punch-clock-021-and-clickable-edit.html
我一直在按照作者的说明(没有成功)说明如何创建表格每列中的按钮。我的项目与他的区别在于我正在尝试使用Tree
而不是Table
,而我正在使用eclipse TreeViewer
插件进行上传。从理论上讲,实现似乎应该是直截了当的,但我似乎无法让它发挥作用。
这是我的代码,它很容易复制,因为它只是带有treeviewer的示例Java PDT sampleview,加上createPartControl
中的十几个额外行。你在这里看不到的一切与样本相同:
class ViewLabelProvider extends LabelProvider implements ITableLabelProvider {
public String getColumnText(Object obj, int i) {
if(i == 0){
return obj.toString();
}
return "";
}
public Image getColumnImage(Object obj, int i) {
if(i == 0){
String imageKey = ISharedImages.IMG_OBJ_ELEMENT;
if (obj instanceof TreeParent)
imageKey = ISharedImages.IMG_OBJ_FOLDER;
return PlatformUI.getWorkbench().getSharedImages().getImage(imageKey);
}
return null;
}
}
class NameSorter extends ViewerSorter {
}
/**
* The constructor.
*/
public ButtonView() {
}
/**
* This is a callback that will allow us
* to create the viewer and initialize it.
*/
public void createPartControl(Composite parent) {
viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
Tree tree = viewer.getTree();
tree.setLinesVisible(true);
tree.setHeaderVisible(true);
TreeColumn column1 = new TreeColumn(tree, SWT.LEFT);
column1.setText("Name");
column1.setWidth(400);
TreeColumn column2 = new TreeColumn(tree, SWT.LEFT);
column2.setText("Some info");
column2.setWidth(300);
// Button experimentation
TreeItem[] items = tree.getItems();
for(int i = 0; i < items.length; i++){
TreeEditor editor = new TreeEditor(tree);
TreeItem item = items[i];
Button button = new Button(tree, SWT.PUSH);
button.setImage(PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJ_ELEMENT));
button.setSize(16,16);
button.pack();
editor.horizontalAlignment = SWT.RIGHT;
editor.setEditor(button, item);
}
drillDownAdapter = new DrillDownAdapter(viewer);
viewer.setContentProvider(new ViewContentProvider());
viewer.setLabelProvider(new ViewLabelProvider());
viewer.setSorter(new NameSorter());
viewer.setInput(getViewSite());
// Create the help context id for the viewer's control
PlatformUI.getWorkbench().getHelpSystem().setHelp(viewer.getControl(), "ButtonTest.viewer");
makeActions();
hookContextMenu();
hookDoubleClickAction();
contributeToActionBars();
}
答案 0 :(得分:1)
当你说你似乎无法让它工作时,你的意思是你无法看到Tree
中的按钮吗?
SWT TreeEditor
类的javadoc给出了树编辑器的一个示例,说明
“编辑器必须与单元格大小相同,且不得小于50像素。”
以下几行确保在示例中满足这些条件:
editor.grabHorizontal = true;
editor.minimumWidth = 50;
因此,如果您将这些行添加到编辑器中,则按钮应该是可见的。
[编辑:我为重现行为做了什么]
我使用了标准的RCP邮件示例项目,并将“Button实验”代码添加到其中。在里面,我使用了简单的文本按钮。
public void createPartControl(Composite parent) {
viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
viewer.setContentProvider(new ViewContentProvider());
viewer.setLabelProvider(new ViewLabelProvider());
viewer.setInput(createDummyModel());
experiment();
}
private void experiment() {
// Button experimentation
Tree tree = viewer.getTree();
TreeItem[] items = tree.getItems();
for(int i = 0; i < items.length; i++){
TreeEditor editor = new TreeEditor(tree);
TreeItem item = items[i];
Button button = new Button(tree, SWT.PUSH);
button.setText("A");
button.setSize(16,16);
button.pack();
editor.horizontalAlignment = SWT.RIGHT;
editor.grabHorizontal = true;
editor.minimumWidth = 50;
editor.setEditor(button, item);
}
}
当我执行这样的代码时,按钮会显示出来。当我注释掉设置编辑器的grabHorizontal
和minimumWidth
值的行时,会显示普通的树单元格渲染器,并且按钮不可见。