• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re: Positioning a string
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Positioning a string


  • Subject: Re: Positioning a string
  • From: Andrew Thompson <email@hidden>
  • Date: Mon, 30 Jan 2006 15:20:44 -0800

On Jan 30, 2006, at 2:00 PM, Julio Cesar Silva dos Santos wrote:

I am experiencing a little trouble with a string I want to draw in an NSRect and as the coordinates in Cocoa are upside-down I am totally confused. This string has a variable height but I want to put it always on the same point from the top of outerSize:

NSSize outerSize = [self bounds].size;
NSSize stringSize = [theString sizeWithAttributes:stringAttrib];
NSPoint stringPoint = NSMakePoint(fixedWidth, fixedHeight);
[theString drawAtPoint:stringPoint withAttributes:stringAttrib];

What is the calculation that I must do to get fixedHeight say, 32 pixels from top? I know, this is basic but I do not get it.

Thanks for any help,


To reverse the coordinate system, just subtract the point from the highest value, so
point.y = topOfView-point.y
where topOfView is the height of the view minus one. (Minus one because the view coordinate system starts at zero).


The string is drawn from the bottom left corner, so, the point is 32 pixels from the top plus the hight of the string.
then you have to reverse it for the coordinate system, so:
point.y = 32 + stringSize.height;
point.y =topOfView - point.y;


Or to put it into your program:


NSSize outerSize = [self bounds].size; NSSize stringSize = [theString sizeWithAttributes:stringAttrib]; NSPoint stringPoint; stringPoint.x = fixedWidth; stringPoint.y = fixedWidth+stringSize.height; stringPoint.y = (outSize-1) - stringPoint.y ; [theString drawAtPoint:stringPoint withAttributes:stringAttrib];

Hope that helps. A lot of times for strange geometric problems it helps me to draw a picture on paper to figure it out.

_______________________________________________
Do not post admin requests to the list. They will be ignored.
Cocoa-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden


References: 
 >Positioning a string (From: Julio Cesar Silva dos Santos <email@hidden>)

  • Prev by Date: Re: Adding a button to a toolbar
  • Next by Date: xcodes deployment
  • Previous by thread: Positioning a string
  • Next by thread: Re: Positioning a string
  • Index(es):
    • Date
    • Thread