NodePresenter(VGraphExplorer parent, NodeProxy model) {
this.parent = parent;
this.model = model;
graph = parent.getGraph();
view.setTitle(model.getId());
Style style = view.getElement().getStyle();
style.setLeft(model.getX(), Unit.PX);
style.setTop(model.getY(), Unit.PX);
view.addDomHandler(this, MouseDownEvent.getType());
view.addDomHandler(this, MouseMoveEvent.getType());
view.addDomHandler(this, MouseUpEvent.getType());
parent.add(view);
}
public void onMouseUp(MouseUpEvent event) {
Element element = view.getElement();
if (!isDragging()) {
updateCSS();
limitToBoundingBox();
if (NodeProxy.EXPANDED.equals(model.getState())) {
model.setState(NodeProxy.COLLAPSED);
for (NodeProxy neighbor : graph.getNeighbors(model)) {
boolean collapsed = NodeProxy.COLLAPSED.equals(neighbor.getState());
boolean leafNode = graph.degree(neighbor) == 1;
if (collapsed && leafNode) {
graph.removeNode(neighbor);
}
}
}
parent.toggle(model);
} else {
parent.save(model, true);
setDragging(false);
}
setMouseDown(false);
DOM.releaseCapture(element);
event.preventDefault();
}
public HandlerRegistration addMouseUpHandler(MouseUpHandler handler) {
return addDomHandler(handler, MouseUpEvent.getType());
}