Callback functions have the following format:
void functionNameCallback (Widget w, XtPointer client_data, XmPushButtonCallbackStruct *cbs)
The callback function parameters are:
The first parameter of the function is the widget associated with the function (button in our case).
The second parameter is used to pass client data to the function. It is not used in our sample program.
The third parameter is a pointer to a structure that contains data specific to the particular widget that called the function and information on the event that triggered the call. The structure we have used is a XmPushButtonCallbackStruct, since we are using the PushButton Widget.
This article was a mere introduction to the world of X/Motif programming. We've looked at a simple Motif program to introduce the basic concepts in building the graphical user interface. For more information, see Resources.
Ibrahim Haddad (firstname.lastname@example.org) is a Ph.D. student in the computer science department at Concordia University in Montréal, Canada. Ibrahim was first introduced to Linux (0.99) and Motif at the Lebanese American University. Among his interests are e-commerce, web applications, distributed objects and helping his friends at LinuxLeb.com (Linux Lebanon).
|Reglue: Opening Up the World to Deserving Kids, One Linux Computer at a Time||Jul 29, 2014|
|diff -u: What's New in Kernel Development||Jul 23, 2014|
|Great Scott! It's Version 13!||Jul 21, 2014|
|Adminer—Better Than Awesome!||Jul 17, 2014|
|It Actually Is Rocket Science||Jul 16, 2014|
|Android Candy: Repix, Not Just Another Photo App||Jul 14, 2014|
- Reglue: Opening Up the World to Deserving Kids, One Linux Computer at a Time
- Numerical Python
- Download "Linux Management with Red Hat Satellite: Measuring Business Impact and ROI"
- NSA: Linux Journal is an "extremist forum" and its readers get flagged for extra surveillance
- diff -u: What's New in Kernel Development
- RSS Feeds
- Tech Tip: Really Simple HTTP Server with Python
- Linux Systems Administrator
- Senior Perl Developer
- Technical Support Rep