How to draw strings around a circle

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Flubbber - 27 Dec 2003 16:17 GMT

Hi,

I'm a Java newbie , and we got an assignment in school to program an
economic graph. The result is a circle devided in a variable number of
segments (standard : 12).

Everything is finished, the only problem is that I need to draw strings
around the circle. On the right hand side , no problem off course, but on
the left side, I would need to draw the string so that the end of the string
touches the circle.

Any suggestions on how to do this ?.

Regards ,

Oliver

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Karsten Lentzsch - 27 Dec 2003 17:21 GMT

> [...] but on the left side, I would need to draw the string
> so that the end of the string touches the circle.

You can measure the string's width for the
graphics context you render it on. This way
you can right-align it.

You can observe how I position strings in
my JDiskReport tool that you can find at:
http://www.jgoodies.com/freeware/jdiskreport/

Actually, the string positions in JDiskReport
are only the initial good guess. I could never
find the time to adjust them to better avoid
overlapping labels.

A true alternative is to render labels on both
sides and draw lines to the associated pies.

Hope this helps,
Karsten

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Flubbber - 29 Dec 2003 17:47 GMT

> > [...] but on the left side, I would need to draw the string
> > so that the end of the string touches the circle.
[quoted text clipped - 17 lines]
> Hope this helps,
> Karsten

Hi Karsten ,

How do you measure the width of the string ?
I know you can count the number of letters ,
but how do you know how much to draw ?

Oliver

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Flubbber - 29 Dec 2003 18:27 GMT

> > > [...] but on the left side, I would need to draw the string
> > > so that the end of the string touches the circle.
[quoted text clipped - 25 lines]
>
> Oliver

String s = xyList[i].getNaam();

FontMetrics fm = getFontMetrics( g.getFont( ) );

if ( xyList[i].getX() < 1 ){

margex= fm.stringWidth( s );

}

the margex is the amount of pixels I move to te left, however , this
doesn't reallt work that good.

Oliver

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Karsten Lentzsch - 29 Dec 2003 19:31 GMT

> How do you measure the width of the string ?

I use FontMetrics#stringWidth(String).

Karsten

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ak - 27 Dec 2003 21:22 GMT

> Everything is finished, the only problem is that I need to draw strings
> around the circle. On the right hand side , no problem off course, but on
> the left side, I would need to draw the string so that the end of the string
> touches the circle.

you need to know width of your String.
Use FontMetrics.stringWidth(String);

____________

http://reader.imagero.com the best java image reader.

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Andrew Thompson - 27 Dec 2003 23:21 GMT

> ...I need to draw strings
> around the circle. On the right hand side , no problem off course, but on
> the left side, I would need to draw the string so that the end of the string
> touches the circle.

FontMetrics(Font f).stringWidth(String s);

--
Andrew Thompson
* http://www.PhySci.org/ PhySci software suite
* http://www.1point1C.org/ 1.1C - Superluminal!
* http://www.AThompson.info/andrew/ personal site

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Flubbber - 29 Dec 2003 18:31 GMT

> ..
> > ...I need to draw strings
[quoted text clipped - 10 lines]
> * http://www.1point1C.org/ 1.1C - Superluminal!
> * http://www.AThompson.info/andrew/ personal site

Hi Andrew ,

this is my code so far :

String s = xyList[i].getNaam();

FontMetrics fm = getFontMetrics( g.getFont( ) );

if ( xyList[i].getX() < 1 ){

margex= fm.stringWidth( s );

}

the margex is the amount of pixels I move to the left before drawing the
string, however this has a different result everytime I change the string.

the IF is used to see if the string is on the left of the circle.

Regards

Oliver

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How to draw strings around a circle

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