<br><br><div class="gmail_quote">On Fri, Sep 3, 2010 at 2:05 PM, Yihui Xie <span dir="ltr"><<a href="mailto:xie@yihui.name">xie@yihui.name</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Hi all,<br>
<br>
What is the 'frame of reference' when we calculating the width of a<br>
string using qstrWidth()?</blockquote><div><br>It only returns a width in item (data) coordinates. There is no concept of position. But if you did draw it at (1,1) with horizontal centering, then the right X boundary would be 2.<br>
<br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> For example, if the string "Hello World" is<br>
centered at (1,1) with width 2 while the limits of the corresponding<br>
layer are qrect(0, 0, 20, 10) (I mean the 'limits' argument in<br>
qlayer(); not geometry), what is the x-coordinate of the point which<br>
lies exactly on the right edge of that string? Thanks!<br>
<br>
Regards,<br>
Yihui<br>
--<br>
<font color="#888888">Yihui Xie <<a href="mailto:xieyihui@gmail.com">xieyihui@gmail.com</a>><br>
Phone: 515-294-2465 Web: <a href="http://yihui.name" target="_blank">http://yihui.name</a><br>
Department of Statistics, Iowa State University<br>
2215 Snedecor Hall, Ames, IA<br>
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