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You won't be able to handle the Touch events as they are handled by our TouchManager in the ScheduleView code. However changing the default template of the Appointments shouldn't cause any issues. We have tested the explained scenario with the default Appointments and were successfully able to select an Appointment by tap and handle the ShowDialog event by double tap. Please try to remove all of the customizations you have made, apply the custom template as simple is possible and let us know if the issue is still present. If so I'll ask you to share some more detailed information about the version of the controls you are using as well as what customizations you have applied.
Hope this will help.
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