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我試圖拖動一個按鈕,並在我的vaadin用戶界面中放下另一個佈局。但它不起作用。它不會改變我放棄它的位置。以下是我的代碼。任何幫助都很棒。拖動的組件確實改變了位置後的位置
public class TestDrag extends VerticalLayout implements View {
@Override
public void enter(ViewChangeEvent event) {
setSizeFull();
addStyleName("stores");
HorizontalLayout layout1=new HorizontalLayout();
Button button=new Button("Save");
DragAndDropWrapper draggable = new DragAndDropWrapper(button);
draggable.setDragStartMode(DragStartMode.COMPONENT);
draggable.setSizeFull();
layout1.addComponent(draggable); // add it to some layout
addComponent(layout1);
HorizontalLayout layout2=new HorizontalLayout();
layout2.setSizeFull();
Button button1=new Button("Cancel");
layout2.addComponent(button1);
DragAndDropWrapper destiny = new DragAndDropWrapper(
layout2);
addComponent(destiny);
destiny.setDropHandler(new DropHandler() {
@Override
public AcceptCriterion getAcceptCriterion() {
return AcceptAll.get();
}
@Override
public void drop(DragAndDropEvent event) {
Notification.show("Dropped!");
}
});
destiny.setSizeFull();
}
}