WinForms - Control is not Docking properly on 1st load.

[melegant]

Bug Report

Version 89.0.170.0
Nuget
architecture x86
Windows 10
WinForms

• What steps will reproduce the problem?
  The dock property of the control is not docking the control Full inside the Tab Container until the second time we open the form.

• What is the expected output? What do you see instead?
  1st time we open the form:
  
  2nd time we open the form
  
  For the rest of the session the browser control displays properly.

• Please provide any additional information below.
  We create the instance of the control in the constructor of the form that ends up being the shown inside the tab.
  ` InitializeComponent();

        _systemSettings = ServiceLocator.Resolve<ISystemSettings>();
        _tokenService = ServiceLocator.Resolve<ITokenService>();
        _userService = ServiceLocator.Resolve<IUserService>();
  
        WindowState = FormWindowState.Maximized;
        browser = new ChromiumWebBrowser("www.google.com") { Dock = DockStyle.Fill };
        Controls.Add(browser);
  
        browser.IsBrowserInitializedChanged += OnIsBrowserInitializedChanged;`
  

  `private void OnIsBrowserInitializedChanged(object sender, EventArgs e)
  {
  var b = ((ChromiumWebBrowser)sender);

        this.InvokeOnUiThreadIfRequired(() => b.Focus());
        this.InvokeOnUiThreadIfRequired(() => b.Refresh());
    }`
  

In the load of the application we are initializing settings :

 if (!Cef.IsInitialized)
                {
                    Cef.EnableHighDPISupport();
                    var settings = new CefSettings();

                    Cef.Initialize(settings, performDependencyCheck: false, browserProcessHandler: null);
                }

NOTE - We discovered that be putting this in app manifest it fixes this issue but breaks the rest of the application :)

<asmv3:windowsSettings xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings"> <ms_windowsSettings:dpiAware xmlns:ms_windowsSettings="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true</ms_windowsSettings:dpiAware> </asmv3:windowsSettings>

Thanks for the help.

[melegant]

Untitled_.Apr.13.2021.3_39.PM.mp4

Attached a movie of what is happening.

[amaitland]

This is a limitation of chromium,
https://github.com/cefsharp/CefSharp/wiki/General-Usage#high-dpi-additional-info has details about a workaround.

Issue #2927 already tracks adding additional options.

[melegant]

@amaitland Hi that did that trick.
We put this in the settings and now it works.
settings.CefCommandLineArgs.Add("disable-gpu", "1");

[amaitland]

Disabling only GPU compositing is preferable.