#include <X11/Xlib.h>

#include <X11/Xutil.h>

#include <X11/Xos.h>

#include <stdio.h>

#include <string.h>

#include "stdlib.h"



#define X 0

#define Y 0

#define WIDTH 300

#define HEIGHT 300

#define WIDTH_MIN 100

#define HEIGHT_MIN 100

#define BORDER_WIDTH 5

#define TITLE "Draw line!"

#define ICON_TITLE "Draw line!"

#define PRG_CLASS "Draw line!"



/*

* SetWindowManagerHints - ÐÒÏÃÅÄÕÒÁ ÐÅÒÅÄÁÅÔ ÉÎÆÏÒÍÁÃÉÀ Ï

* Ó×ÏÊÓÔ×ÁÈ ÐÒÏÇÒÁÍÍÙ ÍÅÎÅÄÖÅÒÕ ÏËÏÎ. 

*/



static void SetWindowManagerHints ( 

 Display *  display, /*õËÁÚÁÔÅÌØ ÎÁ ÓÔÒÕËÔÕÒÕ Display */

 char *   PClass, /*ëÌÁÓÓ ÐÒÏÇÒÁÍÍÙ */

 char *   argv[],   /*áÒÇÕÍÅÎÔÙ ÐÒÏÇÒÁÍÍÙ */

 int     argc,    /*þÉÓÌÏ ÁÒÇÕÍÅÎÔÏ× */

 Window   window,    /*éÄÅÎÔÉÆÉËÁÔÏÒ ÏËÎÁ */

 int     x,     /*ëÏÏÒÄÉÎÁÔÙ ÌÅ×ÏÇÏ ×ÅÒÈÎÅÇÏ */

 int     y,     /*ÕÇÌÁ ÏËÎÁ */

 int     win_wdt,

 int     win_hgt,  /*ûÉÒÉÎÁ É ×ÙÓÏÔÁ ÏËÎÁ */

 int     win_wdt_min,

 int     win_hgt_min, /*íÉÎÉÍÁÌØÎÙÅ ÛÉÒÉÎÁ É ×ÙÓÏÔÁ ÏËÎÁ */

 char *   ptrTitle,  /*úÁÇÏÌÏ×ÏË ÏËÎÁ */

 char *   ptrITitle,/*úÁÇÏÌÏ×ÏË ÐÉËÔÏÇÒÁÍÍÙ ÏËÎÁ */

 Pixmap   pixmap /*òÉÓÕÎÏË ÐÉËÔÏÇÒÁÍÍÙ */

)

{

 XSizeHints size_hints; /*òÅËÏÍÅÎÄÁÃÉÉ Ï ÒÁÚÍÅÒÁÈ ÏËÎÁ*/



 XWMHints wm_hints;

 XClassHint class_hint;

 XTextProperty windowname, iconname;



 if ( !XStringListToTextProperty (&ptrTitle, 1, &windowname ) ||

    !XStringListToTextProperty (&ptrITitle, 1, &iconname ) ) {

  puts ( "No memory!\n");

  exit ( 1 );

}



size_hints.flags = PPosition | PSize | PMinSize;

size_hints.min_width = win_wdt_min;

size_hints.min_height = win_hgt_min;

wm_hints.flags = StateHint | IconPixmapHint |

         InputHint;

wm_hints.initial_state = NormalState;

wm_hints.input = True;

wm_hints.icon_pixmap= pixmap;



class_hint.res_name = argv[0];

class_hint.res_class = PClass;



XSetWMProperties ( display, window, &windowname,

  &iconname, argv, argc, &size_hints, &wm_hints,

  &class_hint );

}



/*

*main - ÏÓÎÏ×ÎÁÑ ÐÒÏÃÅÄÕÒÁ ÐÒÏÇÒÁÍÍÙ

*/



int main(int argc, char *argv[])

{

 Display *display;  /* õËÁÚÁÔÅÌØ ÎÁ ÓÔÒÕËÔÕÒÕ Display */

 int screen_number;    /* îÏÍÅÒ ÜËÒÁÎÁ */

 GC gc;

 XEvent report;

 Window window;

 int new_x, new_y,

     x = 0,

     y = 0;

 int button;

  

 /* õÓÔÁÎÁ×ÌÉ×ÁÅÍ Ó×ÑÚØ Ó ÓÅÒ×ÅÒÏÍ */

 if ( ( display = XOpenDisplay ( NULL ) ) == NULL ) {

  puts ("Can not connect to the X server!\n");

  exit ( 1 );

 }



 /* ðÏÌÕÞÁÅÍ ÎÏÍÅÒ ÏÓÎÏ×ÎÏÇÏ ÜËÒÁÎÁ */

 screen_number = DefaultScreen ( display );



 /* óÏÚÄÁÅÍ ÏËÎÏ */

 window = XCreateSimpleWindow ( display,

     RootWindow ( display, screen_number ),

     X, Y, WIDTH, HEIGHT, BORDER_WIDTH,

     BlackPixel ( display, screen_number ),

     WhitePixel ( display, screen_number ) );



 /* úÁÄÁÅÍ ÒÅËÏÍÅÎÄÁÃÉÉ ÄÌÑ ÍÅÎÅÄÖÅÒÁ ÏËÏÎ */

 SetWindowManagerHints ( display, PRG_CLASS, argv, argc,

   window, X, Y, WIDTH, HEIGHT, WIDTH_MIN,

   HEIGHT_MIN, TITLE, ICON_TITLE, 0 );



 /* ÷ÙÂÉÒÁÅÍ ÓÏÂÙÔÉÑ, ÏÂÒÁÂÁÔÙ×ÁÅÍÙÅ ÐÒÏÇÒÁÍÍÏÊ */

 XSelectInput ( display, window, ExposureMask | KeyPressMask | ButtonPressMask |

		 ButtonReleaseMask | PointerMotionMask | Button1MotionMask | Button2MotionMask );



 /* ðÏËÁÚÙ×ÁÅÍ ÏËÎÏ */

 XMapWindow ( display, window );

 

 /* ãÉËÌ ÐÏÌÕÞÅÎÉÑ É ÏÂÒÁÂÏÔËÉ ÏÛÉÂÏË */

 while ( 1 ) {

  XNextEvent ( display, &report );

  gc = XCreateGC ( display, window, 0 , NULL );

  

  switch ( report.type ) {

    case Expose :

     /* úÁÐÒÏÓ ÎÁ ÐÅÒÅÒÉÓÏ×ËÕ */

     if ( report.xexpose.count != 0 )

      break;

    XDrawString( display, window, gc, 50, 50, "Push button to draw", strlen("Push button to draw") );  

    break;

     

    case ButtonPress:

	/* ÓÏÈÒÁÎÑÅÍ ËÏÏÒÄÉÎÁÔÙ ËÎÏÐËÉ ÍÙÛÉ × ÃÅÌÙÈ ÐÅÒÅÍÅÎÎÙÈ */

    /* ÔÁËÖÅ ÓÏÈÒÁÎÑÅÍ ÉÄÅÎÔÉÆÉËÁÔÏÒ ÏËÎÁ, × ËÏÔÏÒÏÍ ÂÙÌÁ */

    /* ÎÁÖÁÔÁ ËÎÏÐËÁ ÍÙÛÉ                 */

     x = new_x;

     y = new_y;

     new_x = report.xbutton.x;

     new_y = report.xbutton.y;

     window = report.xbutton.window;

	 /* ÐÒÏ×ÅÒÑÅÍ, ËÁËÁÑ ÉÚ ËÎÏÐÏË ÂÙÌÁ ÎÁÖÁÔÁ, */

    switch( report.xbutton.button) {

        case Button1:

		/* ÒÉÓÕÅÍ ÎÏ×ÕÀ ÌÉÎÉÀ Ë ÐÏÚÉÃÉÉ ÍÙÛÉ */

	    XDrawLine( display, window, gc, x, y, new_x, new_y );

	    break;

        case Button3:

		/* ÏÞÉÝÁÅÍ ÜËÒÁÎ */

	    XClearWindow( display, window );

	    XDrawString( display, window, gc, 50, 50, "Push button to draw or any key to exit",

	    strlen("Push button to draw or any key to exit") );  

	    break;

	default:

    	    break;

    }

    /*îÅ ÚÁÂÙ×ÁÊÔÅ ÐÒÏ ÏÔÐÕÓËÁÎÉÅ ËÎÏÐËÉ*/

    case ButtonRelease:

    break;

    /*÷ÙÈÏÄ ÐÒÉ ÎÁÖÁÔÉÉ ÌÀÂÏÊ ËÌÁ×ÉÛÉ*/

    case KeyPress :

     XCloseDisplay ( display );

     exit ( 0 );

  }

  

 XFreeGC ( display, gc );

 }

return 0;

}