[BUG] Scaling of Krypton Forms with multiple monitors

[PontusLindberg]

Scaling of Krypton forms do not work when dragging them between monitors with different scaling.

When you use multiple monitors and they have different scaling (for example a full hd laptop with 100% and a 4K screen with 150%), Krypton forms are not scaled according to the monotor settings when dragging them from one monitior to the other. Regular windows forms are scaled depending on the settings for each monitor.

I use the 4.6 version.

Any feedback would be greatly appreciated.

[Smurf-IV]

Just Checking: @PontusLindberg Have you set the following in your app.config

 <System.Windows.Forms.ApplicationConfigurationSection>
     <add key="DpiAwareness" value="PerMonitorV2" />
 </System.Windows.Forms.ApplicationConfigurationSection>

And in the App.Manifest:

      <!-- Windows 10 -->
      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />
etc....

  <!-- Indicates that the application is DPI-aware and will not be automatically scaled by Windows at higher
       DPIs. Windows Presentation Foundation (WPF) applications are automatically DPI-aware and do not need 
       to opt in. Windows Forms applications targeting .NET Framework 4.6 that opt into this setting, should 
       also set the 'EnableWindowsFormsHighDpiAutoResizing' setting to 'true' in their app.config. -->
  <application xmlns="urn:schemas-microsoft-com:asm.v3">
    <windowsSettings>
      <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true</dpiAware>
    </windowsSettings>
  </application>

[Smurf-IV]

May be related to #73

[PontusLindberg]

Thanks @Smurf-IV, I will check and get back to you.

[PontusLindberg]

@Smurf-IV , the Krypton forms we use are in dlls which are 'add-ons' to an Autodesk application. As long as we stick to regular Windows forms, those are scaled correctly when dragged between monitors. When we change to Krypton, the scaling when dragging between monitors stops working. When we change back to Windows forms, it works fine again.

[PWagner1]

Have a look at this: https://docs.microsoft.com/en-us/dotnet/framework/winforms/high-dpi-support-in-windows-forms I thought that the app.config configuration was only supported in 4.7 and higher?

[PWagner1]

EDIT: Yes high DPI awareness support app.config only exists in .NET 4.7 or higher: Starting with the .NET Framework 4.7, Windows Forms includes enhancements for common high DPI and dynamic DPI scenarios.

[PontusLindberg]

Aha, so we need need newer Krypton dlls?

[PWagner1]

Yes, 5.470 has this configuration built into it, but you'll also may need to re-target your projects to .NET 4.7 or newer.

[PWagner1]

Removed bug label, as .NET Framework 4.7 or higher is required for high DPI scaling.