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Name
qblockedtrace — connect widget and Tcl variable
Syntax
qblockedtrace [widget] variable
Description
The qblockedtrace command assigns a trace variable to a current widget. A trace variable will at all times reflect the state or contents of the widget to which it is assigned. Writing to the variable will update the widget accordingly.
Assigning a value to a trace variable created with qblockedtrace will not result in the widget's callback function being called. To achieve this use qtrace
See qtrace for a further description on how variable tracing works.
Arguments
widget
variable