Cocoa programming question

mr beardsley

I'm working on the challenge for Chapter 5 of "Cocoa Programming for Mac OS X". They want you to make a window in IB and set the behavior on resizing to always have the window be twice as high as it is wide. You are supposed to create a delegate object for the window and use the

Code:

- (NSSize)windowWillResizeNSWindow *)sender

tosizeNSSize)frameSize;







method. So far so good. I have the following code in my .m file

Code:

@implementation AppController



- (NSSize)windowWillResizeNSWindow *)sender toSizeNSSize)frameSize

{

NSSize theSize;

int width;

theSize = NSMakeSize(width, width * 2);

return theSize;

}











It works if I set a constant value for width, but then the window just resizes to that one size when you resize it.



I guess what I need is a method that returns the window's current width. Then I could set the width to that, and the window would maintain the proper ratio while resizing.



Any suggestions on how to do this?



(I realize setting the aspect ratio is a better way of doing this, but the point of the exercise was to use helper objects and delegates.)

spotcatbug

Erm... I'm no Cocoa guru, but doesn't that toSize parameter have the width you're looking for?

mr beardsley

You are a genius with a capital J! I changed the code to look like this.

Code:

@implementation AppController



- (NSSize)windowWillResizeNSWindow *)sender toSizeNSSize)frameSize

{

NSSize theSize;

theSize = NSMakeSize(frameSize.width, frameSize.width * 2);

return theSize;

}











The answer was right under my nose along. Thanks for the help.