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/* This file contains routines that are called when a button is pressed
* in your window or when things happen in a drawing area.
*
* 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 pattern1(Widget w, void *data) /* fill in a different pattern */
{
int i,j;
char *ptr;
MyProgram *me = (MyProgram *)data;
ptr = me->bitmap;
for(i=0; i < me->bitmap_height; i++)
for(j=0; j < me->bitmap_width; j++, ptr++)
{
if ((j%3) == 0)
*ptr = YELLOW;
else if ((j%4) == 0)
*ptr = BLUE;
else if ((j%4) == 0)
*ptr = GREEN;
}
/* since we changed things, we want them to be redisplayed, so.... */
redisplay(NULL, me->win_width, me->win_height, me);
}
void pattern2(Widget w, void *data)
{
int i,j;
char *ptr;
MyProgram *me = (MyProgram *)data;
ptr = me->bitmap;
for(i=0; i < me->bitmap_height; i++)
for(j=0; j < me->bitmap_width; j++, ptr++)
{
if ((j%2) == 0)
*ptr = RED;
if ((j%3) == 0)
*ptr = GREEN;
if ((j%4) == 0)
*ptr = BLUE;
}
/* since we changed things, we want them to be redisplayed, so.... */
redisplay(NULL, me->win_width, me->win_height, me);
}
/*
* 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 new_width, int new_height, void *data)
{
MyProgram *me = data;
int x, y;
me->win_width = new_width;
me->win_height = new_height;
ClearDrawArea(); /* start with a clean slate */
SetColor(RED);
DrawText("My Cool Program", (me->win_width/2)-50, 30);
/* x and y are the offsets into the drawing area of where we want the
* bitmap to be drawn. If you had a bitmap the same size as the
* drawing area, they'd be zero. We want it to be centered, so we
* calculate them appropriately.
*/
x = (me->win_width - me->bitmap_width) / 2;
y = (me->win_height - me->bitmap_height) / 2;
DrawImage(me->bitmap, x,y, me->bitmap_width, me->bitmap_height);
}
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