This is BounceView.m in view mode; [Download] [Up]
/* Generated by Interface Builder */
/* This is certainly a grody file. But it works. So there. I have a better one
* around, which is Interface Builder custom palette compatible. Give me time. */
#import "BounceView.h"
#import <appkit/Window.h>
#import <appkit/Application.h>
#import <dpsclient/wraps.h>
#import "Animator.h"
#import <appkit/publicWraps.h>
#import <strings.h>
#import <appkit/Bitmap.h>
@implementation BounceView
#define RANDINT( n) ((random() % (n+1))+1)
extern srandom(int);
extern long random();
extern long time( long *);
+ newFrame:(NXRect *)r
{
int i;
self = [super newFrame:r];
[[NXApp appIcon] setContentView:self];
for( i=0; i<4; i++) // get random velocities.
vel[ i]=(RANDINT( 1) ? 1 : -1)*(1+minVel+RANDINT( (maxVel-minVel)/2));
pos[ 0][ 0]=pos[ 0][ 2]=bounds.size.width/2;
pos[ 0][ 1]=pos[ 0][ 3]=bounds.size.height/2;
for( i=0; i<numEdges; i++)
[self moveLine];
srandom( time( 0));
return self;
}
- free
{
[animator stop:self];
[animator setTarget:nil];
return [super free];
}
- setAnimator:anObject
{
if( animator==anObject) // nip loops in the bud.
return self;
animator=anObject;
[animator setTarget:self];
[animator setTiming:0.3];
[animator setThreshold:NX_MODALRESPTHRESHOLD]; // this makes it run smoother. why?
return self;
}
- animate:sender
{
[self lockFocus];
PSsetgray( NX_DKGRAY);
PSnewpath();
PSmoveto( bounds.origin.x+pos[ numEdges-1][ 0], bounds.origin.y+pos[ numEdges-1][ 1]);
PSlineto( bounds.origin.x+pos[ numEdges-1][ 2], bounds.origin.y+pos[ numEdges-1][ 3]);
PSstroke();
[self moveLine];
PSsetgray( NX_BLACK);
PSnewpath();
PSmoveto( bounds.origin.x+pos[ 0][ 0], bounds.origin.y+pos[ 0][ 1]);
PSlineto( bounds.origin.x+pos[ 0][ 2], bounds.origin.y+pos[ 0][ 3]);
PSstroke();
[self unlockFocus];
[[self window] flushWindow];
NXPing(); // This makes it run smoother - else code is output
// in larger chunks.
return self;
}
- animator
{
return animator;
}
- drawSelf:(NXRect *)r :(int)count
{
int i;
PSsetgray( NX_DKGRAY);
NXRectFill( &bounds);
PSsetgray( NX_BLACK);
PSnewpath();
for( i=0; i<numEdges; i++) // Not bad. Could be a userpath, though.
{
PSmoveto( bounds.origin.x+pos[ i][ 0], bounds.origin.y+pos[ i][ 1]);
PSlineto( bounds.origin.x+pos[ i][ 2], bounds.origin.y+pos[ i][ 3]);
}
PSstroke();
[[self window] flushWindow];
NXPing(); // Do we need to be smooth here? Maybe not.
// but who cares, as we only redraw seldom.
return self;
}
- moveLine // This is stupid. Anyone have a better way? I once did,
// but it was non-intuitive. There must be some generic
// method. If so, please tell me.
{
int i;
bcopy( pos, &pos[ 1], sizeof( short)*4*(numEdges-1));
for( i=0; i<4; i++)
pos[ 0][ i]+=vel[ i];
if( pos[ 0][ 0]>bounds.size.width || pos[ 0][ 0]<0)
{
if( pos[ 0][ 0]<0)
pos[ 0][ 0]=0;
else
pos[ 0][ 0]=bounds.size.width-1;
vel[ 0]=(vel[ 0]<0 ? 1 : -1)*(minVel+RANDINT( maxVel-minVel));
}
if( pos[ 0][ 1]>bounds.size.height || pos[ 0][ 1]<0)
{
if( pos[ 0][ 1]<0)
pos[ 0][ 1]=0;
else
pos[ 0][ 1]=bounds.size.height-1;
vel[ 1]=(vel[ 1]<0 ? 1 : -1)*(minVel+RANDINT( maxVel-minVel));
}
if( pos[ 0][ 2]>bounds.size.width || pos[ 0][ 2]<0)
{
if( pos[ 0][ 2]<0)
pos[ 0][ 2]=0;
else
pos[ 0][ 2]=bounds.size.width-1;
vel[ 2]=(vel[ 2]<0 ? 1 : -1)*(minVel+RANDINT( maxVel-minVel));
}
if( pos[ 0][ 3]>bounds.size.height || pos[ 0][ 3]<0)
{
if( pos[ 0][ 3]<0)
pos[ 0][ 3]=0;
else
pos[ 0][ 3]=bounds.size.height-1;
vel[ 3]=(vel[ 3]<0 ? 1 : -1)*(minVel+RANDINT( maxVel-minVel));
}
return self;
}
@end
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.