Sorry for the markup language, I did not knew of that!
Of course! I've added a picture of my visualization to this post. I use an accelerated dashboard for the data input values, so just say Partner=$provider$, where it will be * for all providers won't work unfortunately..
The graph "meetcompleetheid" has columns being split by provider. I want users to be able to hit any of the bars so that the "Provider" token (which can also be toggled from the drop-down menu above) will be changed. Below, also my code can be seen upto the first panel: (The .... replaces a couple of lines of which I think won't be relevant to this case..)
<form>
<label>ndw</label>
<search id="ndw_data_main2">
<query>index=ndw Provider=* Partner=* Prefix=*
| stats values(Nageleverd) as "Nageleverd" values("Ontvangen") as "Ontvangen" values("Niet ontvangen") as Niet_ontvangen values("onder_40s") as onder_40s values("t_0s") as t_0s values("Normale verkeersdata") as "Normale_verkeersdata" values("Geen verkeer verkeersdata") as "Geen_verkeer_verkeersdata" values("Herhalingen") as "Herhalingen" values("Fout berichten") as "Foutberichten" by _time Provider Partner Prefix</query>
<sampleRatio>1</sampleRatio>
</search>
<search id="ndw_data_main" base="ndw_data_main2">
<query>stats $calc_method$(Nageleverd) as "Nageleverd" $calc_method$("Ontvangen") as "Ontvangen" $calc_method$("Niet_ontvangen") as Niet_ontvangen $calc_method$("onder_40s") as onder_40s $calc_method$("t_0s") as t_0s $calc_method$("Normale_verkeersdata") as "Normale_verkeersdata" $calc_method$("Geen_verkeer_verkeersdata") as "Geen_verkeer_verkeersdata" $calc_method$("Herhalingen") as "Herhalingen" $calc_method$("Foutberichten") as "Foutberichten" by $overview_tok$</query>
</search>
<fieldset submitButton="true" autoRun="false">
<input type="dropdown" token="overview_tok" searchWhenChanged="false">
<label>Overzicht per...</label>
<choice value="Provider">Provider</choice>
<choice value="Partner">Opdrachtgever</choice>
<choice value="Prefix">Contract</choice>
<choice value="Type">Datatype</choice>
<choice value="Techniek">Techniek</choice>
<choice value="_time">Tijd</choice>
<default>Provider</default>
<initialValue>Provider</initialValue>
</input>
<input type="dropdown" token="calc_method" searchWhenChanged="false">
<label>Berekenmethode</label>
<choice value="avg">Gemiddelde</choice>
<choice value="latest">Laatste</choice>
<default>avg</default>
<initialValue>avg</initialValue>
</input>
<input type="time" token="time_tok" searchWhenChanged="false">
<label>Datum</label>
<default>
<earliest>1483218000</earliest>
<latest>1483225200</latest>
</default>
</input>
<input type="dropdown" token="provider" searchWhenChanged="false">
<label>Provider</label>
<fieldForLabel>Provider</fieldForLabel>
<fieldForValue>Provider</fieldForValue>
<search base="ndw_data_main2">
<query>top Provider</query>
</search>
<choice value="*">Alle</choice>
<default>*</default>
<initialValue>*</initialValue>
</input>
<input type="dropdown" token="partner" searchWhenChanged="false">
<label>Opdrachtgever</label>
<fieldForLabel>Partner</fieldForLabel>
<fieldForValue>Partner</fieldForValue>
<search base="ndw_data_main2">
<query>top Partner</query>
</search>
<choice value="*">Alle</choice>
<default>*</default>
<initialValue>*</initialValue>
</input>
<input type="dropdown" token="prefix" searchWhenChanged="false">
<label>Contract</label>
<fieldForLabel>Prefix</fieldForLabel>
<fieldForValue>Prefix</fieldForValue>
<search base="ndw_data_main2">
<query>top Prefix</query>
</search>
<choice value="*">Alle</choice>
<default>*</default>
<initialValue>*</initialValue>
</input>
</fieldset>
<row>
<panel>
<input type="checkbox" token="meetcompleetheid" searchWhenChanged="true">
<label>Meetcompleetheid</label>
<choice value="meetcompleetheid">Laat zien</choice>
<default>meetcompleetheid</default>
<initialValue>meetcompleetheid</initialValue>
<delimiter> </delimiter>
</input>
<input type="checkbox" token="levertijd" searchWhenChanged="true">
<label>Levertijd</label>
<choice value="levertijd">Laat zien</choice>
<default>levertijd</default>
<initialValue>levertijd</initialValue>
<delimiter> </delimiter>
</input>
<input type="checkbox" token="bruikbaarheid" searchWhenChanged="true">
<label>Bruikbaarheid</label>
<choice value="bruikbaarheid">Laat zien</choice>
<default>bruikbaarheid</default>
<initialValue>bruikbaarheid</initialValue>
<delimiter> </delimiter>
</input>
</panel>
</row>
<row>
<panel depends="$meetcompleetheid$">
<title>Meetcompleetheid</title>
<chart>
<search base="ndw_data_main">
<query>fields $overview_tok$ "Nageleverd" "Niet_ontvangen" "Ontvangen"
| rename Niet_ontvangen as "Niet ontvangen"</query>
</search>
<option name="charting.axisLabelsX.majorLabelStyle.overflowMode">ellipsisNone</option>
.....
<option name="charting.chart.style">shiny</option>
<option name="charting.drilldown">all</option>
<drilldown>
<condition match="'overview_tok' == provider">
<unset token="provider"></unset>
<set token="provider">$click.value$</set>
</condition>
<condition match="'overview_tok' == partner">
<set token="partner">$click.value$</set>
</condition>
<condition match="'overview_tok' == prefix">
<set token="prefix">$click.value$</set>
</condition>
</drilldown>
</chart>
</panel>
</row>
</form>
