[OpenLayers-Users] OL 6 DragZoom Control - how to change condition

[karsten]

Hi All,
 
in OL 6 I would like to use a button so a user can click activate a change
for the dragzoom control 
so it will be available without holding down shift.
In
<https://openlayers.org/en/latest/apidoc/module-ol_interaction_DragZoom-Drag
Zoom.html>
https://openlayers.org/en/latest/apidoc/module-ol_interaction_DragZoom-DragZ
oom.html it lists the option 'condition' to handles this.
I could not figure out how to change and set that condition . Any examples
how to do this?
 
Thanks
Karsten 

Terra GIS LTD
 <http://www.terragis.net> www.terragis.net
 
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