Can't Get Multiple Charts (Google Visualization) on Multiple Tabs (GWT TabPanel)?

When you use tabs in GWT, the panels held in each tab seem to be lazy loaded and aren't completely set up until the user clicks on each tab.

When you use tabs in GWT, the panels held in each tab seem to be lazy loaded and aren't completely set up until the user clicks on each tab. In particular, the tab containers will have zero widths and heights (the error logs will probably be giving an error about containers having zero width) so the graph drawing will fail and leave an empty space. What you need to do (and is probably good practice anyway) is to lazy load the contents of the tabs too so that the graph is loaded only when the tab is fully set up.

This can be done by removing the call the t. SetGraphs(...) and adding a selection handler that does it instead: tabPanel. AddSelectionHandler(new SelectionHandler () { public void onSelection(SelectionEvent event) { // Pseudocode: // n = event.getSelectedItem() // t = displayTabn // g = graphListn // t.

SetGraphs(g) } }); so that graphs are added and drawn only when the tab is selected. You'll probably also want to call tabPanel. SelectTab(0); to force a selection of the first tab after the selection handler is in place.

I had the same issues that you describe and this resolved it.

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