[DUG] Large Fonts/DPI

[John Bird]

In your code below the second PixelsPerInch - is that a form property? 

Eg   if Screen.PixelsPerInch <> form1.PixelsPerInch then

Because I tried to use this code above to detect when a user has a non 96PPI
screen, and it didn't work.  I am guessing the reason is that I let the
application create the forms on startup and when I test using this code the
form is already created and the test above then returns true (they are
equal) - but I am guessing....

John

-----Original Message-----
From: delphi-bounces at ns3.123.co.nz [mailto:delphi-bounces at ns3.123.co.nz] On
Behalf Of Laurence Bevan
Sent: Monday, 7 August 2006 9:44 a.m.
To: delphi at ns3.123.co.nz
Subject: Re: [DUG] Large Fonts/DPI


A quick way of dealing with large fonts is to change the Scaled property of
each form to False, and put this code in the FormCreate:

  Assert(not Scaled, 'You should set Scaled property of Form to False!');
  if Screen.PixelsPerInch <> PixelsPerInch then
    ScaleBy(Screen.PixelsPerInch, PixelsPerInch);

You still have the odd funny looking control but it does a pretty good job
overall. 

Cheers,
Laurence Bevan
Master Business Systems Ltd


----- Original Message -----
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Subject:        	[DUG] Large Fonts/DPI
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I have come across something I have not seen before - and I do not
understand the issues involved and what I need do do, so please help!

Background:
I have some forms I resize according to users screen resolution, and also
settable options which font sizes are to be used in grids, and also default
row height.  Both specified in points.  Behaves nicely on most screens

-Except-

Where screen has been set to use large fonts, eg 120DPI, eg Windows 98 with
a large resolution LCD screen.  The fonts I have set in the grid then become
enormous, nothing like 8 pt which is the default and unreadable.  So how do
I detect the DPI setting, what does it mean for my app, and how do I adjust
the font size.....I am able to do that, but unsure what to adjust.

Any advice or web sites?

John




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