Practical Programming in Tcl & Tk, Third Edition

Embedded Widgets

The text widget can display embedded widgets as well as text. You can include a picture, for example, by constructing it in a canvas and then inserting the canvas into the text widget. An embedded widget takes up one character in terms of indices. You can address the widget by its index position or by the Tk pathname of the widget.

For example, suppose $t names a text widget. The following commands create a button and insert it into the text widget. The button behaves normally, and in this case it invokes the Help command when the user clicks on it:

button $t.help -bitmap questhead -command Help
$t window create end -window $t.help

By default an embedded widget is centered vertically on its text line. You can adjust this with ...