Default SSRS 2012 Parameters Pane to Collapsed in a PerformancePoint Reporting Services Web Part

Using PerformancePoint Reporting Services web parts on a dashboard is a great way to display information alongside Analytic Reports, in ways that aren’t supported by Analytic Reports (e.g. maps or scatter charts) or for data that doesn’t exist in your Analysis Services cubes. Offering visible parameters for your users to manipulate can additionally increase the value and interactivity of a report. However, when displaying a PerformancePoint Reporting Services web part with parameters, the parameters pane defaults to being expanded. Below is an example of a line chart that wouldn’t be easily possible using an Analytic Chart, with the parameters pane obscuring half of it.

Generally this is good (i.e. having the parameters pane defaulting to expanded), but if real estate is an issue (like in the image above), you may want that pane collapsed in its initial state. To work around this issue, we can use the NotifyBrowserOfAsyncUpdate event and some jQuery to locate a PerformancePoint Reporting Services web part and collapse the parameters pane, if it exists. Note, that this event is triggered for every PerformancePoint web part that is updated on a page.

function NotifyBrowserOfAsyncUpdate(elem) {
    // id of web part being updated
    var elemId = $(elem).prop('id');
    // find iframe sources that contain .rdl
    $('#' + elemId).find('iframe[src*="%2Erdl"]').attr('src', function(i, val) {
        return val.replace('&rv:ParamMode=Displayed&','&rv:ParamMode=Collapsed&')
    });
}

Now when your dashboard is displayed, the parameters pane will default to being collapsed, showing your chart, map or tablix in all of its glory.