sync with OpenBSD -current

lib/libXaw/examples/scrollbar.c

@@ -0,0 +1,72 @@
+#define _GNU_SOURCE 
+#include <stdlib.h>
+#include <stdio.h>
+#include <X11/StringDefs.h>
+#include <Xaw/Box.h>
+#include <Xaw/Label.h>
+#include <Xaw/Scrollbar.h>
+#include <Xaw/Command.h>
+
+static void
+quit_cb(Widget w, XtPointer client_data, XtPointer call_data)
+{
+        XtAppSetExitFlag(XtWidgetToApplicationContext(w));
+}
+
+static void
+scroll_cb(Widget widget,XtPointer label_ptr, XtPointer value_ptr)
+{
+	long value =  (long)value_ptr;
+    Widget label = (Widget) label_ptr;
+    char *msg=NULL;
+    asprintf(&msg, "%ld", value);
+    XtVaSetValues( label, XtNlabel, msg,     NULL);
+    free(msg);
+}
+static void
+jump_cb(Widget widget,XtPointer label_ptr, XtPointer value_ptr)
+{
+	float value =  *(float *)value_ptr;
+        Widget label = (Widget) label_ptr;
+	char *msg=NULL;
+	asprintf(&msg, "%lf", value);
+	XtVaSetValues( label, XtNlabel, msg,     NULL);
+	free(msg);
+}	
+
+int main(int argc, char **argv)
+{
+  Widget toplevel,box,label,scroll,command;
+    XtAppContext app_con;
+    toplevel = XtAppInitialize(&app_con, "demo", NULL, 0,
+                               &argc, argv, NULL,
+                               NULL, 0);
+
+    box = XtCreateManagedWidget("box", boxWidgetClass, toplevel, NULL, 0);
+ 
+    label = XtVaCreateManagedWidget("Label",
+                                   labelWidgetClass,
+				    box, XtNlabel, "hello", NULL);
+
+    command = XtVaCreateManagedWidget("cmd",
+				    commandWidgetClass,  box,
+				    XtNlabel, "EXIT",
+				    NULL);
+
+    XtAddCallback(command, XtNcallback, quit_cb, NULL);
+
+    scroll = XtVaCreateManagedWidget("scroller",
+				     scrollbarWidgetClass, box,
+				     XtNorientation,XtorientHorizontal,
+				     XtNlength,500,
+				     XtNwidth,100,
+				     NULL);
+  
+   XtAddCallback(scroll, XtNscrollProc, scroll_cb, label);
+   XtAddCallback(scroll,XtNjumpProc,jump_cb,label);
+
+    XtRealizeWidget(toplevel);
+
+    XtAppMainLoop(app_con);
+    exit(0);
+}