November 1999
Intermediate to advanced
832 pages
19h 28m
English
Content preview from Practical Programming in Tcl & Tk, Third Edition
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Button Operations
Table 27-2 summarizes the operations on button widgets. In the table, $w is a button, checkbutton, radiobutton, or menubutton, except when noted. For the most part, these operations are used by the script libraries that implement the bindings for buttons. The cget and configure operations are the most commonly used by applications.
| $w cget option | Returns the value of the specified attribute. |
| $w configure ?option? ?value? ... | Queries or manipulates the configuration information for the widget. |
| $w deselect | Deselects the radiobutton or checkbutton. Set the radiobutton variable to the null string. Set the checkbutton variable to the off value. |
| $w flash | Redisplays the button several times in alternate colors. ... |
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