EZ
Up Prev Next Contents


3.26.3 An Example

Here is a little example that displays your keyboard input on an LED.

/********************************* LED *****************************/
#include 
#include "EZ.h"

static void readStdin(EZ_Input *id, void *data, int fd, int mask)
{
  EZ_Widget *led = (EZ_Widget *)data;
  char buf[256];
  int n;
  if(mask & EZ_READABLE_MASK)
    {
      n = read(fd, buf, 255);
      if(n > 0)
        {
          buf[n] = 0;
          EZ_ClearLed(led);  /* clean up the current action queue */
          EZ_QueueLedAction(led, EZ_LED_SCROLL_LEFT, 20000, 1000,  buf,  
                                                  ((n&1)? "green": "red"));
        }
    }
}

main(int ac, char **av)
{
  EZ_Widget *led;

  EZ_Initialize(ac,av,0);
 
  led = EZ_CreateWidget(EZ_WIDGET_LED, NULL,
                        EZ_LED_WIDTH,          200,
                        EZ_LED_HEIGHT,         16,
                        EZ_LED_PIXEL_SIZE,     2,
                        EZ_LABEL_POSITION,     EZ_CENTER,
                        EZ_LABEL_STRING,       "Type in something:",
                        EZ_TRANSIENT,          True,
                        0);
  EZ_DisplayWidget(led);
  EZ_AddInput(0, EZ_READABLE_MASK, readStdin, led);
  EZ_EventMainLoop();  
}
/**********************************************************************/


HTML Documentation Maintainance:Arturo Espinosa <arturo@nuclecu.unam.mx>