我正在尝试在SWT中使用DND(拖放)。 TreeView
似乎工作得很好。我想将一个控件(截至目前为止)从一个TabItem拖放到TabFolder中的另一个TabItem。
这里我创建一个TabFolder和两个TabItems并使用setControl来定义每个TabItem中的内容
class DNDTab {
TabFolder tabFolder = new TabFolder(composite, SWT.NONE);
tabFolder.setLayoutData(new GridData(SWT.FILL,GridData.FILL, true, true));
tabItem = new TabItem(tabFolder, SWT.NONE);
tabItem.setText("Favorite");
tabItem.setControl(new CompositeFav(tabFolder));
tabItem = new TabItem(tabFolder, SWT.NONE);
tabItem.setText("Verified");
tabItem.setControl(new CompositeVerified(tabFolder));
}
此处验证的TabItem已定义
class CompositeVerified extends Composite {
CompositeVerified(Composite parent) {
super(parent, SWT.NONE);
GridLayout layout = new GridLayout(1, false);
setLayout(layout);
String[] testList = {"My TestCase 1", "My TestCase 2",
"My TestCase 3", "My TestCase 4", "My TestCase 5"};
for (int i = 0; i < 5; i++) {
final Label dragLabel = new Label(this, SWT.NONE);
dragLabel.setText(testList[i]);
creatingDragSource(dragLabel);
/*** createDragSource is my defined function where each label within the TabItem
* is made as a drag source using "DragSource source = new DragSource(dragLabel, operations);"
***/
}
}
}
此处收藏的TabItem是作为放置目标
class CompositeFav extends Composite {
CompositeFav(final Composite parent) {
super(parent, SWT.NONE);
DropTarget target = new DropTarget(parent, operations);
target.setTransfer(types);
target.addDropListener(new DropTargetListener() {
/*** The part of the code where dragEnter, dragOver, drop events are added***/
}
}
}
正在创建拖动源,并且拖动似乎有效。但是当我将它放入Fav TabItem时,它不会被添加到那里。
答案 0 :(得分:0)
tabFolder首先捕获dropTargetEvent ... 丑陋的黑客:
像这样:
DropTarget target = new DropTarget(tabFolder, DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_DEFAULT);
target.setTransfer(transfers);
target.addDropListener(new DropTargetAdapter() {
public void dragOver(DropTargetEvent event) {}
public void dragEnter(DropTargetEvent event){}
public void dragLeave(DropTargetEvent event){}
public void drop(DropTargetEvent event) {
DropTarget target = targetComposite.getData(DND.DROP_TARGET_KEY);
target.getDropListeners()[0].drop(event);
}
});