On Monday, November 14, 2016 at 10:51:35 AM UTC+1, [email protected]
wrote:
>
> I have some problems when using a CellTree within a DataGrid.
> Everything works except when clicking on the tree, nothing happens.
> I would expect the tree to expand/retract.
> Does anyone know of a solution ?
>
[…]
> private void buildCell(Node rowValue, String cellStyles,
> TableRowBuilder row) {
> NodesTree hw = new NodesTree(rowValue);
> TableCellBuilder td = row.startTD().colSpan(5);
> td.className(cellStyles);
> DivBuilder div = td.startDiv();
> String t = hw.getWidget().getElement().getInnerHTML();
>
First, widgets' event wiring is done in such a way that they need to be
"attached" for the events to actually be listened to;
see
https://github.com/gwtproject/old_google_code_wiki/blob/master/DomEventsAndMemoryLeaks.wiki.md
for an oldish explanation.
Second, even if that wasn't the case, you couldn't expect event handlers to
be preserved when "serializing" the widget's element to HTML and then
re-parse it (moreover, you're taking the innerHTML of the element here,
which excludes the element itself, therefore would have excluded all event
handlers set on the element, *if* serialization would have preserved them,
which is not the case)
So, sorry, but that's not going to work.
It might be possible hacking around: generate placeholder elements in
buildCell and schedule a task that will "attach" the CellTree to the
placeholder element; each time the cell is re-rendered.
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