On the offical docs for Infragistics ig grid, there is nothing mentioned about changing of width.
I have tried:
tooltipShowing: function (evt, args) {
$('#myGrid_tooltips').width(500); // no luck
$('#myGrid_tooltips').addClass('width-500') // still no luck
}
You should set the width over the element with id
grid_tooltips. One more thing, all the tooltips has max-width set to equal the width of the column. If you need to show tooltip wider than the column you need to clear max-width. You can do this in tooltipShown event, as tooltipShowing is too early. This code works fine at my side: