How to right justify fixed decimal point fields
Using drawString() how does one justify a column of fields with fixed decimal point, like a money amount, so that every item in the column is neatly aligned under the item above it. Currently I subtract the length of the string representing the decimal value from an offset like this:
g2.drawString(amountField, XOFFSET - (fontMetrics.stringWidth(amountField)), YOFFSET)
which achieves a degree of right justification, but its not perfect. Is there a better way like the swing
setHorizontalAlignment(mytextField.RIGHT)
?
Thanks.
[574 byte] By [
1bloggs] at [2007-9-26 6:10:41]
That should be easy: cut the string in half.public void drawDecimalPointAlignedText(java.awt.Graphics g, String str, int x, int y) {
int i = str.indexOf(".");
String rightPart = str.substring(0, i);
g.drawString(str, x - getFontMetrics(getFont()).stringWidth(rightPart), y);
}
The coordinates of the decimal point will be approximately (x, y).
This method can be used from for instance the paint method:String str = "5.95";
drawDecimalPointAlignedText(g, str, 50, 20);
str = "99.99";
drawDecimalPointAlignedText(g, str, 50, 30);
jsalonenThat was a nice quick fix, it works pretty well. The only small problem is that "0.00" gets pushed slightly further to the right than the other fileds. Anyway, thanks for the code.
> The only small problem is that "0.00" gets pushed slightly
> furtherto the right than the other fileds.
Does it? By how many pixels?
I tested it and the decimal points were aligned perfectly with strings like "0.00", "11.00", "11.111", "111.11", and "Hello.world!"
Are you using a different font or is there any other explanation to this?
Im using Arial 10pt plain. What are you using? Also I am working with my laptop and printing to a pdf file. I havn't seen the result on my printer yet, there may be a difference. I'll print a hardcopy tomorrow when I get home. Thanks again.
Oh, you are printing...
That can introduce errors in quite a few places; I've mainly worked with display graphics so I don't know.
> Im using Arial 10pt plain. What are you using?
The default font; 10 pixel dialog plain (which is mapped to arial).
You are still using the FontMetrics of the font you are using, right?
