[Qt-interest] monospaced fonts in qgraphicsscene

[Atlant Schmidt]

Peter:

  Perhaps on the Mac the characters are actually of a
  "fractional" width and not exactly 8.000 screen pixels
  wide?

  (I'd expect the Mac would try to compensate for the
  physical size of the screen/the dots-per-inch of the
  screen as it computes just how big it should render
  "12 point" type.)

                       Atlant

-----Original Message-----
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Peter Schmidtke
Sent: Thursday, July 29, 2010 10:23 AM
To: qt-interest at trolltech.com
Subject: [Qt-interest] monospaced fonts in qgraphicsscene

Hello,

I am drawing qgraphicscenes using pyqt and different elements in it. One of these elements is a qgrapchissimpletextitem, where I use a monospaced font (Courier, size 12) printing a long string with capital letters.
Below this string I'd like to show a histogram, building a qgraphicsrectitem for each letter of the string above. For doing this I need to well position my rectangles below each letter. This was possible in Linux systems, where I could set a exact width to each rectangle.

Now I open the whole thing in Mac OSX Snow Leopard and the monospaced font is not shown the same way, So I had a look into fontmetrics for this font, I used the charWidth function, which returns me 8 pixels for one char of Courier, 12. Still my rectangles below don't fit. I tried to use the width function, without success (returns 0).

Basically I cannot manage to fit the width of my rectangles to the width of my characters of my string....did somebody experienced the same issues. It worked fine on openSuse, but is a headache in Mac.

I know that instead of using a String for the sequence I could print every character as seperate object, however this would overload the scene and I don't see the point if monospaced fonts are available.

Thanks in advance.

Peter


On 31/05/2010, at 18:19, <sbremal at hotmail.com> <sbremal at hotmail.com> wrote:

>
> Hello,
>
> I wonder if any standard Qt widget exists for filtering and sorting data in a table view.
>
> There are hundreds of rows in a QSqlTableModel displayed in a QTableView which supposed to be interactively filtered. It would be great if there was some sophisticated component for this, similar to the ones in TOAD or Pgadmin.
>
> Thanks in advance for any suggestion.
>
>
> Cheers,
> Balazs
> _________________________________________________________________
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Peter Schmidtke

-----------------
PhD Student
Department of Physical Chemistry
School of Pharmacy
University of Barcelona
Barcelona, Spain



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