November 1999
Intermediate to advanced
832 pages
19h 28m
English
Content preview from Practical Programming in Tcl & Tk, Third Edition
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Bindings
The hierarchy of bindings has been fixed so that it is actually useful to define bindings at each of the global (i.e., all), class, and instance levels. The new bindtags command defines the order among these sources of binding information. You can also introduce new binding classes, (e.g., InsertMode) and bind things to that class. Use the bindtags command to insert this class into the binding hierarchy. The order of binding classes in the bindtags command determines the order in which bindings are triggered. Use break in a binding command to stop the progression, or use continue to go on to the next level.
bindtags $w [list all Text InsertMode $w]
The various Request events have gone away: CirculateRequest, ConfigureRequest, MapRequest ...
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