Marco -
I hope you won't take a little code analysis the wrong way:
> FontMetrics fm = gc.getFontMetrics(); // gc = Graphics2D instance
> Rectangle2D box = fm.getStringBounds(theText.trim(), gc);
> float incrX = (float)(box.getWidth()/2.0);
> float incrY = (float)(box.getHeight()/2.0);
> gc.setPaint(Color.black);
>
> // apply transform first
> AffineTransform aft =
>(gc.getDeviceConfiguration()).getDefaultTransform();
## This is useless. You might as well say:
##
## AffineTransform aft = new AffineTransform();
##
## The next line (setToTranslation()) will obliterate ANY transform
## setting that was in aft.
>
> // apply translation then rotate
> aft.setToTranslation(currX, currY); // position of centre of text box
> gc.transform(aft);
> aft.setToRotation(Math.toRadians(-currAngle)); // rotation for this
>string
> gc.transform(aft);
## There is a much more convenient way to do this:
##
## gc.translate(currX, currY);
## gc.rotate(Math.toRadians(-currAngle));
##
>
> gc.drawString(theText.trim(), -incrX, incrY);
>
> // undo the transform
> aft.setToRotation(Math.toRadians(currAngle));
> gc.transform(aft);
> aft.setToTranslation(-currX, -currY);
> gc.transform(aft);
## A better way to undo the transform is to do one of the following:
## 1) Put this at the start of the drawing code:
##
## AffineTransform originalAT = gc.getTransform();
##
## and put this after the drawing code:
##
## gc.setTransform(originalAT);
##
## 2) If you will be setting and resetting other gc state, consider
## putting this at the start of the code:
##
## gc = (Graphics2D)gc.create();
##
## and closing your code with:
##
## gc.dispose();
##
For more info on using Affine Transforms in Java2D, see my tutorial:
http://www.glyphic.com/transform/
Specifically, sections 5 & 6 deal with these kinds of code issues. (But
don't miss the animated applets in sections 1, 2, 3, 4 and 7.)
>Although the first character of the text string is postioned & rotated
>correctly, each subsequent character seems to be slightly offset from the
>previous character below the (rotated) string baseline giving a stepped
>appearance.
>
>Has anyone any thoughts on how to cure this.
I believe that turning on anti-aliasing will cure it:
gc.setRenderingHint(
RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
- Mark
-------------------
Mark Lentczner
President
Glyphic Technology
444 Castro Street, Suite 811
Mtn. View, CA 94041
[EMAIL PROTECTED]
http://www.glyphic.com/
650/964-5311 voice
650/967-4379 fax
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