W dniu poniedziałek, 26 października 2015 15:24:54 UTC+1 użytkownik Jaron
Shulver napisał:
>
> Hi,
>
> I want to have a CellTree which expands when you click anywhere on the
> cell, not just on the icon.
>
I've found this in my project, but I don't remember even how it works:).
Especially curious is why did I use com.google.gwt.user.cellview.client
package, probably I needed to override some protect method.
====
package com.google.gwt.user.cellview.client;
import java.util.ArrayList;
import com.google.gwt.dom.client.BrowserEvents;
import com.google.gwt.dom.client.Element;
import com.google.gwt.user.client.Event;
import com.google.gwt.view.client.TreeViewModel;
public class MyCellTree extends CellTree {
public MyCellTree(TreeViewModel model, Object object,
Resources myresources, CellTreeMessages messages, int i) {
super(model, object, myresources, messages, i);
}
@Override
public void onBrowserEvent(Event event) {
String eventType = event.getType();
final boolean isMouseDown =
BrowserEvents.MOUSEDOWN.equals(eventType);
if (isMouseDown)
{
final Element target = event.getEventTarget().cast();
ArrayList<Element> chain = new ArrayList<Element>();
collectElementChain2(chain, getElement(), target);
CellTreeNodeView<?> nodeView = findItemByChain2(chain, 0,
rootNode);
if (nodeView != null)
{
if (!nodeView.isRootNode() && !
nodeView.getImageElement().isOrHasChild(target))
{
nodeView.setOpen(!nodeView.isOpen(), true);
return;
}
}
}
super.onBrowserEvent(event);
}
private void collectElementChain2(ArrayList<Element> chain, Element
hRoot,
Element hElem) {
if ((hElem == null) || (hElem == hRoot)) {
return;
}
collectElementChain2(chain, hRoot,
hElem.getParentElement());
chain.add(hElem);
}
private CellTreeNodeView<?> findItemByChain2(ArrayList<Element>
chain,
int idx, CellTreeNodeView<?> parent) {
if (idx == chain.size()) {
return parent;
}
Element hCurElem = chain.get(idx);
for (int i = 0, n = parent.getChildCount(); i < n; ++i) {
CellTreeNodeView<?> child = parent.getChildNode(i);
if (child.getElement() == hCurElem) {
CellTreeNodeView<?> retItem = findItemByChain2(chain,
idx + 1, child);
if (retItem == null) {
return child;
}
return retItem;
}
}
return findItemByChain2(chain, idx + 1, parent);
}
}
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