Make common code KVC compliant, and implement NSCopying where relevant

git-svn-id: https://tikzit.svn.sourceforge.net/svnroot/tikzit/trunk@420 7c02a99a-9b00-45e3-bf44-6f3dd7fddb64

1 files changed, 10 insertions, 8 deletions

diff --git a/tikzit/src/common/Transformer.m b/tikzit/src/common/Transformer.m
index fe4d135..403ae87 100644
--- a/tikzit/src/common/Transformer.m
+++ b/tikzit/src/common/Transformer.m
@@ -107,6 +107,16 @@ float const PIXELS_PER_UNIT = 50;
 	return self;
 }
 
+- (id)copyWithZone:(NSZone *)zone {
+	Transformer *cp = [[[self class] allocWithZone:zone] init];
+	if (cp) {
+		cp->origin = origin;
+		cp->x_scale = x_scale;
+		cp->y_scale = y_scale;
+	}
+	return cp;
+}
+
 - (NSPoint)origin { return origin; }
 - (void)setOrigin:(NSPoint)o {
 	origin = o;
@@ -191,14 +201,6 @@ float const PIXELS_PER_UNIT = 50;
 	return r1;
 }
 
-- (id)copyWithZone:(NSZone *)zone {
-	Transformer *cp = [[[self class] allocWithZone:zone] init];
-	cp->origin = origin;
-	cp->x_scale = x_scale;
-	cp->y_scale = y_scale;
-	return cp;
-}
-
 - (BOOL)isEqual:(id)object {
     Transformer *t = (Transformer*)object;
     return ([t origin].x == [self origin].x &&