In short - yes, it is possible to add your custom control as content for the time bar control. Basically, you can add any kind of control as content for the time bar control.
Regarding your question, about synchronizing your control with the time intervals - this will happen automatically, in case the time period that your custom control covers is the same as the time period of the time bar control. When the user zooms in, the time bar expands the width, available for its content and thus, the content stretches as well.
the Telerik team
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