The widget roundup provides you with a quick and easy reference to the most important features
and options for each Tk widget.
Button
Widget Essentials
| When to use: | When you want your user to invoke some operation (submit a dialog, calculate a result, save a file, etc.) |
|---|---|
| Python: | b = ttk.Button(parent, text="Okay", command=submitForm) |
| Tcl: | ttk::button .b -text "Okay" -command "submitForm" |
| Ruby: | b = Tk::Tile::Button.new(parent) {text "Okay"; command "submitForm"} |
| Perl: | my $b = parent->new_ttk__button(-text => "Okay", -command => sub {submitForm();}); |
| Reference: | (at www.tcl.tk) |
Common Options
| text | The label to be shown in the button. |
|---|---|
| command | The script to invoke when the button is pressed. |
| default | If "active", this is a "default" button for the window, i.e. the one that will be invoked if the user presses Return. Regular state is "normal" (You need to set up the event binding separately.) |
| image, compound |
Specify a Tk Image object (not the path to an image file) instead of the text label. If compound is center, top, bottom, left, or right, display the text and the image. |
How do I...
| Press the button from my program? | Use the "invoke" method. Useful so you don't need to repeat the button's command script in multiple places in your program. |
|---|---|
| Disable the button? | Use the "state disabled" method. You can reenable this with "state !disabled". Check with "instate disabled" (returns 1 if disabled, else 0). |