I noticed this is your very first post to any Google forum. Welcome. GChart 2.4 has a built-in single point selection capability. Here's an example of how to use that:
http://gchart.googlecode.com/svn/trunk/doc/com/googlecode/gchart/client/package-summary.html#GChartExample21 To emulate multiple selection, you could add a second curve that had the same symbol type (and other properties such as width) as the first (so that it would overlay it) but only included the points (bars) you wanted to be selected. The setImageURL method could then be applied to this second curve, passing in your semi-transparent image. Selection/deselection would then be a matter of adding/removing points to/from this second curve, and calling the update method to refresh the chart. John C. Gunther http://gchart.googlecode.com On Feb 11, 1:38 pm, Paul Wang <[email protected]> wrote: > Hi, > > I'd like to put a semi-transparent panel on top of a gchart to show > disabled areas of a bar graph. I looked through gchart 2.4 and didn't > see anything that'd let me easily find out where bars are located so I > can position a panel on top of it. > > Is there a better way to do this? I also need to do this without any > user input (no events). > > -- > Paul Wang --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~----------~----~----~----~------~----~------~--~---
