No, Jean-Daniel's method looks right. The first -translateXBy:yBy:
moves (0, 0) to the center of your text rectangle. -rotateByDegrees:
rotates the coordinate system by 90 degrees around that center point,
then the second call to -translateXBy:yBy: restores the coordinate
system's (0, 0) point to what it was so that when you draw the text
in rcWhereToDraw, it will be correctly rotated.
On Aug 6, 2008, at 1:46 AM, Vitaly Ovchinnikov wrote:
Will test this too, but I don't think it will work.
In my case I moved rectangle from it's real position to zero, then
rotate around zero and then moved back.
In your case I will move it far from zero and then rotate...
But I will give it a try.
On Wed, Aug 6, 2008 at 11:20 AM, Jean-Daniel Dupas
<[EMAIL PROTECTED]> wrote:
Shouldn't be this instead (check the translations' signs) ?
[tr translateXBy:dx yBy:dy]; // center or rect will be the center of
rotation
[tr rotateByDegrees:90]; // rotate it
[tr translateXBy:-dx yBy:-dy]; // move it back
Le 6 août 08 à 08:46, Vitaly Ovchinnikov a écrit :
Hello,
I need to draw NSString rotated to 90 degrees. Now I have the code:
NSRect rcWhereToDraw = NSMakeRect(........); // <- rect is already
"rotated" here
[str drawInRect:rcWhereToDraw withAttributes:attributes]; // string
will be drawn non-rotated
as far as I know, I need something like this:
[[NSGraphicsContext currentContext] saveGraphicsState];
NSRect rcWhereToDraw = NSMakeRect(........);
float dx = NSMidX(rcWhereToDraw), dy = NSMidY(rcWhereToDraw);
NSAffineTransform *tr = [NSAffineTransform transform];
[tr translateXBy:-dx yBy:-dy]; // center or rect will be the
center of
rotation
[tr rotateByDegrees:90]; // rotate it
[tr translateXBy:dx yBy:dy]; // move it back
[tr concat];
[str drawInRect:rcWhereToDraw withAttributes:attributes];
[[NSGraphicsContext currentContext] restoreGraphicsState];
This doesn't work, where am I wrong?
Thank you.
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