/*
 *
 * Copyright (c) 1994
 * Hewlett-Packard Company
 *
 */

#ifndef PAP__WINDOW_H
#define PAP__WINDOW_H

#include <X11/Xlib.h>
#include <X11/Xutil.h>

class BasicWindow
{
protected:
    unsigned int width;
    unsigned int height;
    Display* display;
    Window window;
    GC gc;
    int isExposed() 
    { 
	XEvent xEvent;
	XNextEvent(display ,&xEvent);
	return xEvent.type == Expose;
    }
public:
    BasicWindow(unsigned int n, unsigned int m, char* title);
    ~BasicWindow();
    void displayPoint(unsigned int x, unsigned int y, char* colorName);
    void erasePoint(unsigned int x, unsigned int y);
};

BasicWindow::BasicWindow(unsigned int n, unsigned int m, char* title)
: width(n), height(m), display(XOpenDisplay(""))
{
    int screen = DefaultScreen(display);
    window = XCreateSimpleWindow(display, DefaultRootWindow(display),
				 0, 0, width, height, 5, 
				 WhitePixel(display, screen),
				 BlackPixel(display, screen));
    XSetStandardProperties(display, window, title, title, None, 0, 0, 0);
    gc = XCreateGC(display, window, 0, 0);
    XSelectInput(display, window, ButtonPressMask |KeyPressMask |ExposureMask);
    XMapRaised(display, window);
    while (!isExposed());
}

BasicWindow::~BasicWindow()
{
    XFreeGC(display, gc);
    XDestroyWindow(display, window);
    XCloseDisplay(display);
}
    
void BasicWindow::displayPoint(unsigned int x, unsigned int y, char* colorName)
{
    XMapRaised(display, window);
    int screen = DefaultScreen(display);
    XColor color, exact;
    XAllocNamedColor(display, DefaultColormap(display, screen), 
		     colorName, &exact, &color);
    XSetForeground(display, gc, color.pixel);
    XDrawPoint(display, window, gc, x, height - y);
}

void BasicWindow::erasePoint(unsigned int x, unsigned int y)
{
    XMapRaised(display, window);
    int screen = DefaultScreen(display);
    XSetForeground(display, gc, BlackPixel(display, screen));
    XDrawPoint(display, window, gc, x, height - y);
}

#endif