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- #import "Circle.h"
- #import "draw.h"
- #import <appkit/nextstd.h>
- #import <dpsclient/wraps.h>
- #import <math.h>
-
- @implementation Circle : Graphic
-
- - (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 (!NXEqualColor([self fillColor], NX_COLORCLEAR)) {
- if (!NXEqualColor([self lineColor], NX_COLORCLEAR)) PSgsave();
- [self setFillColor];
- PSFilledOval(bounds.origin.x, bounds.origin.y,
- bounds.size.width, bounds.size.height);
- if (!NXEqualColor([self lineColor], NX_COLORCLEAR)) PSgrestore();
- }
- if (!NXEqualColor([self lineColor], NX_COLORCLEAR)) {
- [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
-
-