This is Circle.m in view mode; [Download] [Up]
#import "draw.h"
/*
* This line is just a stub to get genstrings to generate
* a .strings file entry for the name of this type of Graphic.
* The name is used in the Undo New <Whatever> menu item.
*
* NXLocalString("Circle", NULL, "Name of the tool that draws ovals, i.e., the %s of the New %s operation.")
*/
@implementation Circle : Graphic
+ initialize
/*
* This bumps the class version so that we can compatibly read
* old Graphic objects out of an archive.
*/
{
[Circle setVersion:1];
return self;
}
- (Graphic *)colorAcceptorAt:(const NXPoint *)point
/*
* An oval accepts a dropped color if the drop occurs
* within the bounds of the circle itself.
*/
{
if ([self hit:point]) return self;
return nil;
}
- (float)naturalAspectRatio
/*
* The natural aspect ratio of an oval is 1.0 (a circle).
*/
{
return 1.0;
}
- draw
{
if (bounds.size.width < 1.0 || bounds.size.height < 1.0) return self;
if ([self fill]) {
PSgsave();
[self setFillColor];
PSFilledOval(bounds.origin.x, bounds.origin.y, bounds.size.width, bounds.size.height);
PSgrestore();
}
if (!gFlags.nooutline) {
[self setLineColor];
PSFramedOval(bounds.origin.x, bounds.origin.y, bounds.size.width, bounds.size.height);
}
return self;
}
- (BOOL)hit:(const NXPoint *)p
/*
* Hit only if inside the interior of the oval.
*/
{
NXCoord x, y;
NXPoint center;
double angle, radius, diameter;
if ([super hit:p]) {
center.x = bounds.origin.x + bounds.size.width / 2.0;
center.y = bounds.origin.y + bounds.size.height / 2.0;
diameter = MIN(bounds.size.width, bounds.size.height);
x = fabs(center.x - p->x) / (bounds.size.width / diameter);
y = fabs(center.y - p->y) / (bounds.size.height / diameter);
angle = atan2(y, x);
radius = diameter / 2.0;
return(x < radius * cos(angle) && y < radius * sin(angle));
} else {
return NO;
}
}
@end
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.