How do I open and hide different nested panels based on clicks?

[devraj_p]

Any help is highly appreciated...

I have a panel(1) which shows 3 different single values say a,b,c
When I click on a, it should open another panel(2) with 3 single values say d,e and f
and similarly, when I click on b, it should open another panel(3) with 3 single values say g,h,i and panel (4) with values j,k,l when c is clicked.
Further on clicking the value d or e or f, it opens 1 panel for each respectively, and same for remaining single values.

Summary.

Note: Every ( ) is 1 panel

.       (a                   b                 c)         Level 1 (Single Values) on clicking a,b,c respectively we get
.   (d e f)          (g h i)          (j k l)       Level 2 (Single Values) clicking the values respectively we get below tables 
(m) (n) (o)   (p) (q) (r)   (s) (t) (u)  Level 3 opens m if d is clicked, opens n if e is clicked, opens o if f is clicked, respectively (Here m,n,o, etc. are individual tables with Rows and Columns)

Also, a way to make the opened panels in levels 2 and 3 hide once again would be great.

[devraj_p]

This worked out for me, Thanks a lot.

[renjith_nair]

Here is a sample with one level , you can easily build on top of it

<dashboard>
  <label>DrillDown</label>
  <row>
    <panel>
      <single>
        <search>
          <query>|makeresults|eval a="a"</query>
          <earliest>-15m</earliest>
          <latest>now</latest>
        </search>
        <option name="drilldown">all</option>
        <option name="rangeColors">["0x53a051","0x0877a6","0xf8be34","0xf1813f","0xdc4e41"]</option>
        <option name="showSparkline">0</option>
        <drilldown>
          <set token="a">$click.value$</set>
          <unset token="b"></unset>
          <unset token="c"></unset>
        </drilldown>
      </single>
    </panel>
    <panel>
      <single>
        <search>
          <query>|makeresults|eval b="b"</query>
          <earliest>-15m</earliest>
          <latest>now</latest>
        </search>
        <option name="drilldown">all</option>
        <drilldown>
          <set token="b">$click.value$</set>
          <unset token="c"></unset>
          <unset token="a"></unset>
        </drilldown>
      </single>
    </panel>
    <panel>
      <single>
        <search>
          <query>|makeresults|eval c="c"</query>
          <earliest>-15m</earliest>
          <latest>now</latest>
        </search>
        <option name="drilldown">all</option>
        <drilldown>
          <set token="c">$click.value$</set>
          <unset token="b"></unset>
          <unset token="a"></unset>
        </drilldown>
      </single>
    </panel>
  </row>
  <row>
    <panel depends="$a$">
      <single>
        <search>
          <query>|makeresults|eval d="d"</query>
          <earliest>-15m</earliest>
          <latest>now</latest>
        </search>
        <option name="drilldown">all</option>
        <drilldown>
          <set token="d">$click.value$</set>
          <unset token="e"></unset>
          <unset token="f"></unset>
        </drilldown>
      </single>
    </panel>
    <panel depends="$a$">
      <single>
        <search>
          <query>|makeresults|eval e="e"</query>
          <earliest>-15m</earliest>
          <latest>now</latest>
        </search>
        <option name="drilldown">all</option>
        <drilldown>
          <set token="e">$click.value$</set>
          <unset token="d"></unset>
          <unset token="f"></unset>          
        </drilldown>
      </single>
    </panel>
    <panel depends="$a$">
      <single>
        <search>
          <query>|makeresults|eval f="f"</query>
          <earliest>-15m</earliest>
          <latest>now</latest>
        </search>
        <option name="drilldown">all</option>
        <drilldown>
          <set token="f">$click.value$</set>
          <unset token="e"></unset>
          <unset token="d"></unset>          
        </drilldown>
      </single>
    </panel>
    <panel depends="$b$">
      <single>
        <search>
          <query>|makeresults|eval g="g"</query>
          <earliest>-15m</earliest>
          <latest>now</latest>
        </search>
        <option name="drilldown">none</option>
      </single>
    </panel>
    <panel depends="$b$">
      <single>
        <search>
          <query>|makeresults|eval h="h"</query>
          <earliest>-15m</earliest>
          <latest>now</latest>
        </search>
        <option name="drilldown">none</option>
      </single>
    </panel>
    <panel depends="$b$">
      <single>
        <search>
          <query>|makeresults|eval i="i"</query>
          <earliest>-15m</earliest>
          <latest>now</latest>
        </search>
        <option name="drilldown">none</option>
      </single>
    </panel>
  </row>
  <row>
    <panel depends="$d$">
      <table>
        <search>
          <query>index=_internal|stats count by sourcetype</query>
          <earliest>-15m</earliest>
          <latest>now</latest>
        </search>
        <option name="drilldown">none</option>
      </table>
    </panel>
  </row>
</dashboard>