Regarding Graphics.MeasureString

[OsirisGothra]

For some reason, I can never get an accurate measurement of a string... is this a problem for anyone else or is there something I am missing? Usually the string measurement is fine on smaller strings but once it gets more than a few characters long I find that it is reporting that it is much longer than it really is.. (esp. with say exclamation points and periods and such involved) Also, I am setting the string format to measure trailing spaces when needed... I also realize the .Width and .Height properties are single precision and I round them off or just use them as is, but it just seems that the measurements are WAY OFF sometimes!! :mad: Can anyone help me here!?

[a_jam_sandwich]

What code are you using cause ive never had problems :)

 

Andy

[OsirisGothra]

this is in VB.NET

 

Dim W As Single

Dim cFont as New Font("Times New Roman",12,FontStyle.Regular)

 

v.FormatFlags = v.FormatFlags Or StringFormatFlags.MeasureTrailingSpaces

W = owner.CreateGraphics.MeasureString(X(I), cFont, owner.Width, v).Width

 

I've tried

dest.X += Math.Round(W)

and

dest.X += W

 

and

dest.X += Convert.ToInt32(W)

 

The X coordinate seems to end up anywhere from 4 to 20 pixels away from the actual end of the string on screen.

[divil]

Are you actually using the same Font object to draw with as you are to measure with?

[OsirisGothra]

Yes it is the same font object

Might i add that the string in question is being drawn by

a directdraw surface ddsurface.DrawText

[Volte]

Try looking at this page:

 

http://www.codeproject.com/cs/media/measurestring.asp

[divil]

If you're not drawing the text using GDI+, I'm not at all surprised you get different results.

[Volte]

In theory, when you draw text at a particular size, it should be the same regardless of what you use to draw it. MeasureString does seem to be a bit inaccurate; perhaps it has something to do with variable-width fonts.

[divil]

GDI+ uses grid fitting to draw text at sub-pixel accuracy, I wouldn't want to compare results from GDI+ and non GDI+ functions.

[OsirisGothra]

well then, is there a function simmilar to this for DirectDraw?

[Volte]

I don't know about for DD, but you might try one of the two alternatives (I would say try the second one, it's more accurate) on the page I linked to above.

[Nerseus]

I would recommend using the API functions to measure text and draw text. You won't get the anti-aliasing features of GDI+, but you also won't encounter the known bugs that exist in .NET GDI+.

 

-Nerseus

[OsirisGothra]

Ok... yeah i fixed it using the GetTextExtentExPoint API function, works like a charm... :) YAY....

 

- Thanks Everyone For The Help!

 

If anyone ever has trouble with this type of thing ask me for details on getting that to work in .NET osirisgothra@hotmail.com

now i'm off to go make a new problem :)