[DUG] Windows 10 issues

[Dennis Chuah]

> Also for Delphi programmers – Windows 10 ... it seems to stretch the 
> window/form sizes but does NOT change the DPI setting...

This is the standard behaviour since Windows 7 (Vista?). Essentially, any 
applications that are not DPI aware will be stretched. You can enable DPI 
awareness either by a WinApi call (SetProcessDPIAware) or through your 
application manifest but then you run into VCL issues with non 96-dpi 
setting - remember the large font issue in Windows XP?  Essentially to get 
DPI-aware working in Delphi, you will need to either call the WinApi 
function or change the application manifest AND you will need to scale your 
forms, scale controls on the forms and scale your font size appropriately. 
You will also need to scale your graphics (and have a set of different 
resolution graphics for different DPI's). From Win8.1 onwards, you will also 
need to respond to a message (WM_DPICHANGED) about dynamic DPI changes - 
different monitors can have different DPI settings. (Call 
SetProcessDPIAwareness instead). It is all not a trivial exercise.

Dennis.


From: John Bird
Sent: Thursday, July 30, 2015 9:37 AM
To: 'delphi at listserver.123.net.nz'
Subject: [DUG] Windows 10 issues


Upgraded to Windows 10 on my personal Delphi PC last night, had already 
played with it at work and all seemed OK.   Although the upgrade worked, it 
sort of turned to custard as email and Delphi and Browsing were not working 
afterwards:



·         A standard HP ended up with no working network or wireless driver, 
so googling and downloading updated drivers if available was not an option

·         Delphi 2007 does not run (it loads but cannot  display any 
projects and complains about .NET 2.5) – seems to require .Net 2.5 which is 
not on Windows 10 .  Does anyone know if this can be downloaded separately? 
Or if I have the Delphi 2007 installer will reinstalling fix this?

·         Also for Delphi programmers – Windows 10 seems does settings 
differently around increasing text size – under “Screen resolution” and 
“Make text and other items larger or smaller”   it seems to stretch the 
window/form sizes but does NOT change the DPI setting.   This means the 
fonts on Delphi forms becomes smudged.  I had some quite good workarounds 
for sizing grids/column widths/fonts when text size was set to 125% but 
these will have to be revisited for Windows 10



John Bird |HealthOne  Programmer |  Pegasus Health (Charitable)  Ltd



P:  (03) 379 1739  |  W:   www.pegasus.org.nz  |  E: 
john.bird at pegasus.org.nz

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