[hpsdr] powerSDR and High resolution

[Alan Hopper]

Microsoft recently updated windows forms (as used by powersdr) to better
support high dpi
https://docs.microsoft.com/en-us/dotnet/framework/winforms/high-dpi-support-in-windows-forms
73 Alan M0NNB

On Wed, Jun 28, 2017 at 4:14 PM, John Marvin <jm-hpsdr at themarvins.org>
wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
> This is a "bug" in PowerSDR, but it's root cause is due to the Windows
> design for dpi scaling (in particular, font scaling) being so bad. People
> writing software for Mac's don't even have to think much about this because
> MacOS got this right (and please don't accuse me of being a Mac fan, I'm
> just a developer who ran into this issue on Windows and found that I didn't
> have to do anything for the Mac port of the application).
>
> Evidence for the bad Windows design is indicated by how many times Windows
> has made changes in this area over the years. I haven't looked closely at
> the Windows 10 fixes, so I can't say whether they may have finally got it
> right.
>
> Anyway, for those who have 4K displays and don't see a problem you need to
> understand that 4K resolution doesn't necessarily mean "High DPI".  The
> scaling problem is when you have a High DPI display. If you have a 4K
> display, but your monitor size is > 30" then you really don't have a very
> high DPI display, although it is probably higher DPI than many non 4K
> displays. The problem is not high resolution, the problem is with high DPI.
>
> To make an application work correctly for High DPI displays on Windows you
> need to modify the application to make it "DPI Aware". Google for "WIndows
> DPI Aware" for details. To see some of the issues, Google for "Windows High
> DPI scaling".
>
> If you want to see the issues with PowerSDR for yourself, try changing
> your font scaling to 200-250%. For some versions of windows you may need to
> click on "Set custom text size" or something similar if you don't get the
> option to scale above 150% (and a lot of applications have problems even at
> 150%). Even then the dialog may only let you go to 200% with the drop down
> box, but if it has a ruler, try dragging on the ruler (in Windows 7 you can
> get to 500% that way).  I use this method periodically to make sure I
> haven't broken support for High DPI displays, even though I don't own a
> High DPI display.
>
> Higher and higher DPI displays are coming, although the really high dpi
> displays tend to be smaller displays. It's rumored that the Samsung Galaxy
> Note 8 will have a 4K display. If the screen size isn't much above 6" that
> is going to be a > 600 dpi display!
>
> 73,
>
> John
> AC0ZG
>
> On 6/27/2017 5:14 PM, Brian D. Comer wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> George
>
> My display is only 3200 X 1800. When I set the DPI to 1 as per the windows
> 10 note it locked out the scaling under settings. If I Turn off custom
> scaling and sign out, when it comes back powerSDR is messed  up. If "Change
> the size of text, and other apps" is set to 250% as recommended, powerSDR
> is
> totally messed up, if set to 100 or 125 the vertical is correct but the
> horizontal takes the full width. The GTX 970 M driver recommended by Razer
> or something does not seem to handle this well. Only setting DPI to 1 with
> regedit seems to get a good result. It is interesting to note that, a
> second
> monitor I have connected with only 1920 by 1080 follows the built in
> monitor
> on the lap top ever if it set as the primary monitor.
>
> I'm also using Windows 10 Creator's Edition.
>
> I understand this is a windows setting and the program is working as it was
> designed. However now with small hi resolution screens this makes the text
> very small. The GUI window comes up 5 by 2.8 inches. I can go to full
> screen
> buy that only results in the same size text sparsely spread over the
> screen.
>
>
> Brian KF6C
>
>
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