In a subclass of Tree:
/*
* This sucks. There has to be a faster way to do this.
*/
public TreeItem getTreeItemAt(int p_y)
{
Iterator<TreeItem> iter = treeItemIterator();
TreeItem nearest = null;
TreeItem exact = null;
// adjust as necessary to return exact or nearest
// it can be optimized to bail when you have a hit
while (iter.hasNext())
{
TreeItem item = (TreeItem)iter.next();
int top = item.getAbsoluteTop();
int height = item.getOffsetHeight();
if (top >= 0 && height != 0)
{
nearest = item;
if (p_y >= top && p_y < top+height)
{
exact = item;
}
}
}
return exact;
}
Event handler:
public void onMouseDown(MouseDownEvent event)
{
if (event.getNativeButton() == NativeEvent.BUTTON_RIGHT)
{
// Suppress the browser's default context menu.
// Opera 10.10 ignores this and shows the context menu
anyway.
// Opera 10.50 handles this correctly (i.e. like all other
browsers).
event.preventDefault();
// Don't propagate to parents
event.stopPropagation();
Tree tree = (Tree)event.getSource();
TreeItem item =
tree.getTreeItemAt(event.getNativeEvent().getClientY());
// do whatever with the TreeItem...
}
}
On Jul 1, 9:25 am, Yaakov <[email protected]> wrote:
> How do you accomplish the "hit test", if you don't mind sharing that
> part.
>
> Thanks,
> Yaakov.
>
> On Jul 1, 11:52 am, Jim Douglas <[email protected]> wrote:
>
>
>
> > I listen for the right-click event on the Tree, then do a hit test of
> > the point to identify the corresponding TreeItem. And don't forget to
> > call preventDefault() on the event to suppress the browser's default
> > context menu. (That last part works in Opera 10.5x, but Opera 10.10
> > ignores it and puts up the context menu anyway.)
>
> > On Jul 1, 8:24 am, Yaakov <[email protected]> wrote:
>
> > > Well, TreeItem does not inherit from a Widget, so it doesn't have
> > > onBrowserEvent to override. So, how would you do that then?
>
> > > Thanks,
> > > Yaakov.
>
> > > On Jul 1, 3:20 am, rudolf michael <[email protected]> wrote:
>
> > > > hello,
> > > > you need to override the default behavior of the browser event on the
> > > > treeitem
> > > > @Override
> > > > public void onBrowserEvent(Event event) {
> > > > super.onBrowserEvent(event);
> > > > if(DOM.eventGetType(event)==Event.ONMOUSEDOWN){
> > > > if (DOM.eventGetButton(event) == Event.BUTTON_RIGHT){
> > > > TreeHandler.onRightClick(this);
> > > > }else if (DOM.eventGetButton(event) == Event.BUTTON_LEFT){
> > > > TreeHandler.onLeftClick(this);
> > > > }}else if(DOM.eventGetType(event)==Event.ONMOUSEOVER){
>
> > > > TreeHandler.onMouseOver(this);}else
> > > > if(DOM.eventGetType(event)==Event.ONMOUSEOUT){
>
> > > > TreeHandler.onMouseOut(this);
>
> > > > }
> > > > }
>
> > > > On Thu, Jul 1, 2010 at 8:19 AM, ganesh.shirsat
> > > > <[email protected]>wrote:
>
> > > > > hi,
>
> > > > > How to get TreeItem on right click in GWT 2.0.3
>
> > > > > please help me
>
> > > > > thanks,
> > > > > Ganesh Shirsat
>
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