As soon as I open the dashboard , a panel with a single value should be display ( the count ) and on clicking the single value a drilldown should be populated as show hide ( more details , such as type of data , email id , etc .)
you have to create a token and pass it to the drilldown row/panel. In the xml you need to add depends to either panel OR row
<row depends="$tokenname$">
<panel depends="$tokenname$">