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No selection without CompositeLayer? [message #1046733]

Mon, 22 April 2013 05:42

Eclipse User

Hi,

there seems to be an unexpected difference between

...
ViewportLayer viewportLayer = new ViewportLayer(treeLayer);
natTable = new NatTable(parent, viewportLayer , false);
...

and

...
ViewportLayer viewportLayer = new ViewportLayer(treeLayer);
CompositeLayer compositeLayer = new CompositeLayer(1, 1);
compositeLayer.setChildLayer(GridRegion.BODY, viewportLayer, 0, 0);
natTable = new NatTable(parent, natLayer, false);
...

To my surprise only the version with the composite layer results in a table that reacts on mouseclicks (selection and editing). Why is that? am I missing some important point?

As far as I understand the com[posite layer it is only responsible for composing a table from different layers. Right?

There is some

compositeLayer.registerCommandHandler(new EditCellCommandHandler());
compositeLayer.registerEventHandler(new InlineCellEditEventHandler(compositeLayer));

but if I apply all this to the viewportlayer it does not make a difference.

Thanks for your help.

J

Re: No selection without CompositeLayer? [message #1046744 is a reply to message #1046733]

Mon, 22 April 2013 06:01

Eclipse User

The difference is this:

Quote:

compositeLayer.setChildLayer(GridRegion.BODY, viewportLayer, 0, 0);

which adds the GridRegion.BODY region label which gets interpreted by handlers etc.

Re: No selection without CompositeLayer? [message #1046768 is a reply to message #1046744]

Mon, 22 April 2013 06:44

Eclipse User

To be more precise, in the DefaultEditBindings the mouse action bindings are registered against the GridRegion.BODY label. You need to adjust this to make the bindings work.

Re: No selection without CompositeLayer? [message #1046777 is a reply to message #1046768]

Mon, 22 April 2013 06:57

Eclipse User

In other words the DefaultEditBindings expect the cells to be labelled as GridRegion.BODY which could be achieved by a) adding this label manually or b) customizing the bindings? I understand that. But in the case described above there was no way to select a cell nor to expand/collapse a tree node. The selection related code was the same in both cases.

Re: No selection without CompositeLayer? [message #1046781 is a reply to message #1046777]

Mon, 22 April 2013 07:03

Eclipse User

The same applies for the selection. Have a look at the DefaultSelectionBindings.

We work around that issue usually by applying the region label to the ViewportLayer like this

viewportLayer.setRegionName(GridRegion.BODY);

We will look at this in our future architecture. But for now this should solve your issues.

Re: No selection without CompositeLayer? [message #1046787 is a reply to message #1046781]

Mon, 22 April 2013 07:12

Eclipse User

Yes it does. Thank you for clarifying this.

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