在 EditorPalette 中,模板使用 JLabels 表示,可以在 mxGraphComponent 中拖放,对吧?
但是,我想通过JTree使用层次结构将这些模板添加到EditorPalette中,并且节点不能像普通模板那样在GraphComponents中拖放
您能否通过提供添加模板的功能来帮助我,以便在组件左侧添加 JTree 并在 mxGraphComponent 上拖放?
好的,我明白了。我的错误是,我必须创建一个 mxCell 提供几何信息,所以而不是
mxCell cell = new mxCell(component);
在上面的代码中我必须写
mxCell cell = new mxCell(component, new mxGeometry(), "");
添加拖动功能的完整方法如下所示:
public void addComponentTabListeners() {
final JTree componentTree = view.componentTree;
DragGestureListener dragGestureListener = new DragGestureListener() {
@Override
public void dragGestureRecognized(DragGestureEvent arg0) {
TreePath path = componentTree.getSelectionPath();
if ((path == null) || (path.getPathCount() <= 1)) {
return;
}
DefaultMutableTreeNode componentsNode = (DefaultMutableTreeNode) path.getLastPathComponent();
I_Component component = null;
try {
component = ComponentHandler_KonsensApplication.getInstance().createInstance(
componentsNode.toString(), "need unique Name here");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
mxCell cell = new mxCell(component, new mxGeometry(), "");
cell.setVertex(true);
mxRectangle bounds = new mxRectangle();
bounds.setHeight(80);
bounds.setWidth(80);
mxGraphTransferable t = new mxGraphTransferable(new Object[] { cell }, bounds);
arg0.startDrag(null, mxSwingConstants.EMPTY_IMAGE, new Point(), t, null);
}
};
DragSource dragSource = new DragSource();
dragSource.createDefaultDragGestureRecognizer(componentTree, DnDConstants.ACTION_COPY,
dragGestureListener);
}