Intro

Getting Started

The first thing to do, of course, is download the GDXlib source and install it. You can always get the latest version from http://mrgibson.com/GDXlib/.

To begin our introduction to GDXlib, we'll start with the simplest program possible. This program will create a window 200 pixels by 200 pixels.

demo.c:


#include <GDXlib/GDXlib.h>

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

  x_open();

  gdx_window("demo",200,200);

  gdx_main();

  x_close();
   
  return 0;
}

You can compile the above program with gcc using:


gcc demo.c -o demo -lX11 -lXpm

line 1

All programs will of course include GDXlib/GDXlib.h which declares the variables, functions, structures, etc. that will be used in your GDXlib application.

line 5

This line establishes a connection witht he X server.


  x_open();

line 7

The next line creates a window with the title 'demo' and the deminsions of 200x200 pixels.


  gdx_window("demo",200,200);

line 9

The next line enters the GDXlib main processing loop.


  gdx_main();

gdx_main() is a function you will see in most GDXlib applications. When control reaches this point, GDXlib waits for X events (such as button or key presses) to occur.