Summary

Drawing:

• Specify points with pt(x,y)
• Specify rectangles with rect(x,y,width,height)
• Draw using draw_line, draw_rect, fill_rect etc.
• Change drawing colour, e.g. set_colour(g, GREEN);
• You need a Graphics object to draw

Windows:

• Create windows with new_window
• You need an App object, e.g. App *app = new_app(argc, argv);
• E.g. new_window(app, rect(0,0,400,300), "Name", STANDARD_WINDOW);
• Add a redraw call-back using on_window_redraw(w, fn);
• Redraw call-backs for windows are defined void fn(Window *w, Graphics *g);
• Show the window on screen with show_window(w);
• Handle events by calling main_loop(app);