test-custom-menu.c

#include <stdio.h>

#include <Xm/Xm.h>
#include <Xm/MwmUtil.h>
#include <Xm/AtomMgr.h>
#include <Xm/PushB.h>
#include <Xm/Protocols.h>

Widget topLevel;

void customMenuItemAActivated(const Widget w, const XtPointer data, const XtPointer cbs) {
	printf("Custom menu item A activated\n");
}

void customMenuItemBActivated(const Widget w, const XtPointer data, const XtPointer cbs) {
	printf("Custom menu item B activated\n");
}

void buttonActivated(const Widget w, const XtPointer data, const XtPointer cbs) {
	Display *display = XtDisplay(topLevel);
	const Atom xaMwmMenu = XmInternAtom(display, _XA_MWM_MENU, False);
	Atom actualType;
	int actualFormat;
	unsigned long nItems;
	unsigned long bytesAfter;
	unsigned char *property;
	if (XGetWindowProperty(display, XtWindow(topLevel),
			xaMwmMenu, 0L, 64L, False, AnyPropertyType,
			&actualType, &actualFormat, &nItems, &bytesAfter,
			&property) == Success) {
		printf("XA_MWM_MENU = %ld; actualType = %ld; actualFormat = %d; nItems = %ld; bytesAfter = %ld; property = \"%s\"\n",
				xaMwmMenu, actualType, actualFormat, nItems, bytesAfter, property);
	} else {
		printf("XA_MWM_MENU property not found\n");
	}
}

int main(int argc, char *argv[]) {
	XtAppContext appContext;
	XtSetLanguageProc(NULL, NULL, NULL);
	const char *applicationClass = "XmWindowMenuTest";
	topLevel = XtVaAppInitialize(&appContext, applicationClass, NULL, 0, &argc, argv, NULL,
			XmNtitle, "Window Menu Test, " XmVERSION_STRING,
			XmNiconName, "Window Menu Test, " XmVERSION_STRING " (Icon)",
			NULL);

	const XmString buttonText = XmStringCreateLocalized("Print menu details to standard output");
	const Widget button = XtVaCreateManagedWidget("Button", xmPushButtonWidgetClass, topLevel,
			XmNlabelString, buttonText,
			NULL);
	XtAddCallback(button, XmNactivateCallback, buttonActivated, NULL);

	Display *display = XtDisplay(topLevel);
	Atom xaMwmMessages = XmInternAtom(display, _XA_MWM_MESSAGES, False);
	XmAddWMProtocols(topLevel, &xaMwmMessages, 1);

	const char *customMenu =
		"no-label						f.separator\n"		\
		"Custom\\ Menu\\ Title					f.title\n"		\
		"XTerm							f.exec \"xterm &\"\n"	\
		"Custom\\ Menu\\ Action\\ A	Shift Alt<Key>F1	f.send_msg %d\n"	\
		"Custom\\ Menu\\ Action\\ B	Shift Alt<Key>F2	f.send_msg %d\n";

	char *customMenuAtomName0 = "CUSTOM_MENU_ACTION_A";
	const Atom customMenuAtom0 = XmInternAtom(display, customMenuAtomName0, False);
	XmAddProtocolCallback(topLevel, xaMwmMessages, customMenuAtom0, customMenuItemAActivated, NULL);

	char *customMenuAtomName1 = "CUSTOM_MENU_ACTION_B";
	const Atom customMenuAtom1 = XmInternAtom(display, customMenuAtomName1, False);
	XmAddProtocolCallback(topLevel, xaMwmMessages, customMenuAtom1, customMenuItemBActivated, NULL);

	char buf[256];
	sprintf(buf, customMenu, (int) customMenuAtom0, (int) customMenuAtom1);
	XtVaSetValues(topLevel, XmNmwmMenu, buf, NULL);

	XtRealizeWidget(topLevel);
	XtAppMainLoop(appContext);

	return 0;
}