DPIAwareness
Just some ideas (not tried):
Are you running on XP? That option might not work on that platform.
- http://social.msdn.microsoft.com/Forums/en-US/vcgeneral/thread/5e60a54d-baf5-46e3-9eac-a959f2a0fba1/
What follows are probably just different ways to set the same DpiAwareness option:
-
look at the “compatibility mode” settings on your EXE…right click it’s properties…and turn on “Disable display scaling”
-
create a manifest, and say you aren’t aware
<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0" xmlns:asmv3="urn:schemas-microsoft-com:asm.v3" > ... <asmv3:application> <asmv3:windowsSettings xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings"> <dpiAware>false</dpiAware> </asmv3:windowsSettings> </asmv3:application> ... </assembly>
-
call
SetProcessDPIAware
(think you have to call this early i.e. before Window is created)http://msdn.microsoft.com/en-gb/library/windows/desktop/ms633543(v=vs.85).aspx
You can call IsProcessDPIAware
to check if your apps process has had the setting applied to it or not.
Finding out the DPI
Here’s how you find out what DPI you are currently using:
Access CompositionTarget
via the PresentationSource
of your Window
to find out what DPI scaling it’s using…..you can then use the values to do some scaling adjustments i.e. scale down your “stuff” (whose sizes/length/etc are specified in Device Independent Units), so that when its scaled up due to a higher DPI being in effect it doesn’t explode the physical pixel usage (…this can be done in various ways e.g. ViewBox
, or calculations on widths, etc on elements ).
double dpiX, double dpiY;
PresentationSource presentationsource = PresentationSource.FromVisual(mywindow);
if (presentationsource != null) // make sure it's connected
{
dpiX = 96.0 * presentationsource.CompositionTarget.TransformToDevice.M11;
dpiY = 96.0 * presentationsource.CompositionTarget.TransformToDevice.M22;
}
- How do I convert a WPF size to physical pixels?
- http://wpftutorial.net/DrawOnPhysicalDevicePixels.html
Do Scaling Adjustments
-
use the
ViewBox
trickSee this answer I made before that allowed a
Canvas
to use positions that were interpreted as “native” pixel no matter what the DPI scaling. -
access the
TransFormToDevice
scaling matrix on theCompositionTarget
, and from that calculate a new matrix that just undoes that scaling and use that inLayoutTransform
orRenderTransform
. -
use a method (maybe even put it in a Converter) that modifies a DIP (Device Independent Position) position/length on an explicit basis….you might do that if you want your Window Size to match a particular pixel size.