Listing 1. helloworld.c Program
/* General header for the motif library */
#include <Xm/Xm.h>
/* Header for the Push Button Widget */
#include <Xm/PushB.h>
/* Prototype Callback function */
void pushedButton (Widget , XtPointer , XmPushButtonCallbackStruct *);
main(int argc, char **argv)
{
Widget topWidget, button;
XtAppContext app;
topWidget = XtVaAppInitialize (&app,
"Push", NULL, 0, &argc, argv, NULL, NULL);
button = XmCreatePushButton(topWidget,
"Hello World! Push me!", NULL, 0);
/* tell Xt to manage button */
XtManageChild(button);
/* Add a callback to the button widget */
XtAddCallback(button, XmNactivateCallback,
pushedButton, NULL);
XtRealizeWidget(topWidget); /* display widget hierarchy */
/* enter processing loop */
XtAppMainLoop(app);
}
void pushedButton (Widget w, XtPointer client_data, XmPushButtonCallbackStruct *cbs)
{
printf("Hello to you too!\n");
}
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