/* Motif Tutorial - Arrange */

#include <stdlib.h>
#include <Xm/Xm.h>
#include <Xm/PushB.h>
#include <Xm/RowColumn.h>

#define BUTTONS 5
#define BUTTON_NAME_MAX 20

/** Button push callback
 *
 * Called when the user pushes
 * any of the buttons.
 *
 */
void button_pushed(Widget widget, XtPointer data, XmPushButtonCallbackStruct * cbs) {
	printf("Pushed %s\n", XtName(widget));
}

/** Main
 *
 * Creates the application window
 * with a single button and starts
 * Motif event loop.
 *
 */
int main(int argc, char * argv[]) {
	Widget window;                /* Widgets */
	Widget rowcol;
	Widget buttons[BUTTONS];      /* Buttons */
	String button_names[BUTTONS]; /* Button names */
	XtAppContext app;             /* Application */
	int i;
	
	/* Create application window */
	window = XtVaAppInitialize(&app, "Application", NULL, 0, &argc, argv, NULL, NULL);
	
	/* Create managed container of widgets */
	rowcol = XtVaCreateManagedWidget("Container", xmRowColumnWidgetClass, window, NULL);
	
	/* Create several buttons as children
	   of the container and set their
	   callbacks */
	for (i = 0; i < BUTTONS; i++) {
	
		/* Create button label */
		button_names[i] = (String) calloc(BUTTON_NAME_MAX, sizeof(char));
		snprintf(button_names[i], BUTTON_NAME_MAX, "Button%d", i);
		button_names[i][BUTTON_NAME_MAX - 1] = 0;
		
		/* Create button */
		buttons[i] = XtVaCreateManagedWidget(button_names[i], xmPushButtonWidgetClass, rowcol, NULL);
		
		/* Set callback on push event */
		XtAddCallback(buttons[i], XmNactivateCallback, (XtCallbackProc) button_pushed, NULL);
	}
	  
	/* Display the main window */
	XtRealizeWidget(window);
	
	/* Motif event loop */
	XtAppMainLoop(app);
	
	/* Cleanup */
	for (i = 0; i < BUTTONS; i++)
		free(button_names[i]);
}