kevin@edstip.EDS.COM (Kevin Brown) (04/05/91)
Using Motif 1.0 and X11R4, is it possible to bind multiple functions to one button press event. I know that twm contains a function called f.function, which allows the user to name and create a function. Is there an equivalent in Motif? Thanks in advance. Kevin Brown | kevin@edstip.eds.com Electronic Data Systems | 800 Tower Drive | Voice: (313) 265-9232 Troy, MI 48013 | Fax: (313) 265-9241 -- Kevin Brown | kevin@edstip.eds.com Electronic Data Systems | 800 Tower Drive | Voice: (313) 265-9232 Troy, MI 48013 | Fax: (313) 265-9241
cjmchale@cs.tcd.ie (Ciaran McHale) (04/06/91)
In <922@edstip.EDS.COM> kevin@edstip.EDS.COM (Kevin Brown) writes: >Using Motif 1.0 and X11R4, is it possible to bind multiple functions >to one button press event. I know that twm contains a function called >f.function, which allows the user to name and create a function. Is >there an equivalent in Motif? Use XtAddCallback() to bind function foo to the ButtonPress event on a widget. Then use XtAddCallback() again to bind function bar to the widget for the same event type. Guess what? Both functions (foo and bar) will be invoked (in order of their binding) when the button is pressed in the widget. Amazing, isn't it :-) And now for my next trick ... :-) Ciaran. -- Ciaran McHale "There's a lot to be said for verbosity." ---- Department of Computer Science, Trinity College, Dublin 2, Ireland. \ / Telephone: +353-1-772941 ext 1538 FAX: +353-1-772204 \/ Telex: 93782 TCD EI email: cjmchale@cs.tcd.ie
mikey@sgi.com (Mike Yang) (04/07/91)
In article <1991Apr5.175019.14043@cs.tcd.ie> cjmchale@cs.tcd.ie (Ciaran McHale) writes: >In <922@edstip.EDS.COM> kevin@edstip.EDS.COM (Kevin Brown) writes: >Use XtAddCallback() to bind function foo to the ButtonPress event on a >widget. Then use XtAddCallback() again to bind function bar to the >widget for the same event type. Guess what? Both functions (foo and bar) >will be invoked (in order of their binding) when the button is >pressed in the widget. Amazing, isn't it :-) Be careful. Although the current Xt implementation may call the callbacks for the same event type in order of their binding, the documentation specifically says that the ordering is unspecified. Therefore, if you require a specific ordering, you should add a single callback which performs your operation in the desired sequence. ----------------------------------------------------------------------- Mike Yang Silicon Graphics, Inc. mikey@sgi.com 415/335-1786