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/* This file contains callback routines that drive the display.
*
* If you add a function to this file, you should also add a function
* prototype for it to the callbacks.h file (unless it is an internal
* function, then you should just add it down below where it says
* "internal prototypes").
*
* -- This code is under the GNU copyleft --
*
* Dominic Giampaolo
* dbg@sgi.com
*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <math.h>
#include "libsx.h"
#include "main.h"
#include "callbacks.h"
void quit(Widget w, void *data)
{
/* Do any cleanup that is necessary for your program here */
exit(0);
}
void next_cmap(Widget w, void *data)
{
MyProgram *me = (MyProgram *)data;
me->cur_colormap++;
if (me->cur_colormap > 3)
me->cur_colormap = 0;
SetColorMap(me->cur_colormap);
}
void prev_cmap(Widget w, void *data)
{
MyProgram *me = (MyProgram *)data;
me->cur_colormap--;
if (me->cur_colormap < 0)
me->cur_colormap = 3;
SetColorMap(me->cur_colormap);
}
/* Here is where all redrawing will take place for your program.
* When the window needs to be redrawn, this function will be called.
* When your program starts up for the first time, this function will
* be called and you should draw anything you need to draw in here.
*/
void redisplay(Widget w, int width, int height, void *data)
{
MyProgram *me=data;
int i;
ClearDrawArea(); /* start with a clean slate */
for(i=0; i < width; i++) /* draw some pretty patterns */
{
SetColor(i); /* this will step through the gradient of colors */
DrawLine(0,i, i,height);
}
for(i=0; i < width; i++)
{
SetColor(i);
DrawLine(width,i, width-i,height);
}
SetColor(RED);
DrawText("My Cool Program", (width/2)-50, height/2);
}
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