Java GWT DnD(拖放)布局问题
从此处使用拖放库时,会出现以下情况: 将绝对面板放置在相对面板内时,它似乎 禁用拖动功能。一个简单的例子:Java GWT DnD(拖放)布局问题,java,gwt,drag-and-drop,Java,Gwt,Drag And Drop,从此处使用拖放库时,会出现以下情况: 将绝对面板放置在相对面板内时,它似乎 禁用拖动功能。一个简单的例子: private AbsolutePanel leftPanelTree = new AbsolutePanel(); private HorizontalPanel drawingAppPanel = new HorizontalPanel(); private VerticalPanel leftPanel = new VerticalPanel();
private AbsolutePanel leftPanelTree = new AbsolutePanel();
private HorizontalPanel drawingAppPanel = new HorizontalPanel();
private VerticalPanel leftPanel = new VerticalPanel();
private VerticalPanel rightPanel = new VerticalPanel();
private Label rightSideFiller = new Label("Right Side");
private Label leftSideFiller = new Label("Left Side");
private Image newImage = new Image("images/link.gif");
private PickupDragController newDragController =
new PickupDragController(leftPanelTree, true);
public DrawingApplication() {
initWidget(drawingAppPanel);
newDragController.makeDraggable(newImage);
leftPanelTree.setWidth("300px");
leftPanelTree.setHeight("200px");
leftPanelTree.addStyleName("panelBorderTest");
leftPanelTree.add(newImage, 1, 1);
drawingAppPanel.setWidth("100%");
drawingAppPanel.setHeight("100%");
drawingAppPanel.setBorderWidth(2);
drawingAppPanel.add(leftPanel);
drawingAppPanel.add(rightPanel);
leftPanel.setBorderWidth(2);
leftPanel.setHeight("100%");
leftPanel.setWidth("100%");
leftPanel.add(leftSideFiller);
//leftPanel.add(leftPanelTree);
rightPanel.add(rightSideFiller);
}
但是,如果我将图像添加到RootPanel(并更改边界
面板)或直接将绝对面板添加到根面板
然后拖动功能就可以工作了。我是不是遗漏了什么 问题不在我的代码中毕竟,调用RootPanel.get().clear()有一个文档问题;这导致这个库基本上不起作用。在此问题下有一个可用的修复程序: 但这并不容易找到。希望这将在未来的版本中修补(如果有)