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).
|HPC Cluster Grant Accepting Applications!||Jan 28, 2015|
|Sharing Admin Privileges for Many Hosts Securely||Jan 28, 2015|
|Red Hat Enterprise Linux 7.1 beta available on IBM Power Platform||Jan 23, 2015|
|Designing with Linux||Jan 22, 2015|
|Wondershaper—QOS in a Pinch||Jan 21, 2015|
|Ideal Backups with zbackup||Jan 19, 2015|
- Sharing Admin Privileges for Many Hosts Securely
- HPC Cluster Grant Accepting Applications!
- Red Hat Enterprise Linux 7.1 beta available on IBM Power Platform
- Internet of Things Blows Away CES, and it May Be Hunting for YOU Next
- Designing with Linux
- Ideal Backups with zbackup
- Wondershaper—QOS in a Pinch
- Slow System? iotop Is Your Friend
- diff -u: What's New in Kernel Development
- Hats Off to Mozilla
Editorial Advisory Panel
Thank you to our 2014 Editorial Advisors!
- Jeff Parent
- Brad Baillio
- Nick Baronian
- Steve Case
- Chadalavada Kalyana
- Caleb Cullen
- Keir Davis
- Michael Eager
- Nick Faltys
- Dennis Frey
- Philip Jacob
- Jay Kruizenga
- Steve Marquez
- Dave McAllister
- Craig Oda
- Mike Roberts
- Chris Stark
- Patrick Swartz
- David Lynch
- Alicia Gibb
- Thomas Quinlan
- Carson McDonald
- Kristen Shoemaker
- Charnell Luchich
- James Walker
- Victor Gregorio
- Hari Boukis
- Brian Conner
- David Lane