Hi Guilherme,
Thanks for contacting Syncfusion support.
Currently there is no support in TreeGrid control to trigger rowSelected event while right clicking, but when right clicking the TreeGrid row, the contextMenuOpen event will be triggered also the row will be selected.
Can you please share us more details about your requirement ? So that we can analyze and provide the appropriate work around for this.
We have also logged a usability feature regarding this. A support incident has been created under your account to track the status of this requirement. Please log on to our support website to check for further updates.
https://www.syncfusion.com/account/login?ReturnUrl=/support/directtrac/incidents
Please let us know if you require further assistance on this.
Regards,
Mahalakshmi K.