Re: Help
Re: Help
- Subject: Re: Help
- From: Fritz Anderson <email@hidden>
- Date: Mon, 27 Feb 2006 10:16:50 -0600
On Feb 27, 2006, at 8:59 AM, Anoop Thomas varghese wrote:
I have made some changes in sketch example. I am a beginner in
cocoa. Our
desired out put is to display the width of text at the mid
point of a
line.
Yes... and? You leave us to guess what your difficulty is, or what
question you mean to ask.
You do not say what behavior you expect of your code, and what it
does instead. Your bezierPath handler has two nearly-identical blocks
of code in the middle, with no explanation of why you do this. You
end the function with a close-comment marker, but you never open the
comment. Assuming you mean to comment-out the second block of code,
you do not explain why you include it in your question. You never use
the auto variable locationText; what is it? You never use the
bezierPath handler in your drawRect: handler; consequently, you never
draw the line. The lower-left corner of a rectangle is at the
minimum Y, not the maximum. You use the variable name "width" when
you mean "length;" this is a potential source of confusion. If a
Bézier path is needed elsewhere by Sketch, you don't say so, and many
of your potential respondents will not take the trouble to pore
through the Sketch source in order to find that out. Your bezierPath
handler both returns the Bézier path and, as a side effect, attempts
to draw the path; side effects are best avoided in value-returning
functions. Passing the drawRect: message in your own code is usually
a bad idea, and can never be done without lockFocus or
lockFocusIfCanDraw. Better is to use setNeedsDisplay and let Cocoa
handle the scheduling and setup. Your bounds-rectangle calculation
(which you won't need once you remove the direct call to drawRect:)
does not take account of the possibility that the width of the string
you mean to draw will be greater than the width of the bounding
rectangle of the line itself.
-- F
--
Fritz Anderson -- http://www.manoverboard.org/
Consulting Programmer -- http://resume.manoverboard.org/
Step into Xcode, Now Available -- http://six.manoverboard.org/
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| | >Help (From: "Anoop Thomas varghese" <email@hidden>) |