How to set token in a filter to show panel in dashboard

[avi7326]

I have a filter of Entity which has token t_entity and in drilldown it has All, C2V ,C2C and Cases . And I have different panels of this which is showing counts. I have a separate panel of C2V counts which I only want to show when it is selected from the filter .
Filter name-Entity
Token Name- t_entity
How is this possible to show a panel when we select it from the filter.

[richgalloway]

Use the depends option on the panel to control whether is is shown or not.

<panel depends="$t_entity$">
...
</panel>

The panel will be shown if the specified token has any value, which is not exactly what you're looking for.  In this case, we want to set a different token if t_entity has a specific value.

<input token=t_entity ...>
  ...
  <change>
    <condition value="C2V">
      <set token="show_panel">1</set>
    </condition>
    <condition>
      <unset token="show_panel" />
    </condition>
  </change>
</input>
...
<panel depends="$show_panel$">
...
</panel>

[avi7326]

where should I put this in my query as my query starts with-

<row>
<panel>
<title></title>
<single><search>

<query></query>
<earliest>

<latest>
<sampleRatio>1</sampleratio>
</search>

[richgalloway]

It's not a plug-n-play answer.  Use it as a guide for building your dashboard.  The <input> section shows parts that should be in your <input> section and the <panel> section shows how to make the panel show or hide based on a token.