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WPF/OffScreen Mouse wheel becomes unresponsive #2408

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amaitland opened this issue Jun 4, 2018 · 8 comments
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WPF/OffScreen Mouse wheel becomes unresponsive #2408

amaitland opened this issue Jun 4, 2018 · 8 comments
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known-issue offscreen wpf WPF Implementation
Milestone
67.0.0

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@amaitland
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  • What version of the product are you using?
    65-pre01 and 66 based CEF builds

  • What architecture x86 or x64?

Both

  • On what operating system?
    • Win7, Win 8, Win10, etc?

Win 10, likely Win 7 as well

  • Are you using WinForms, WPF or OffScreen?

WPF and OffScreen

  • What steps will reproduce the problem?
    After reloading a page 3-4 times scrolling no longer works. SendMouseWheelEvent method

  • What is the expected output? What do you see instead?

Scrolling with mouse should function normally

https://bitbucket.org/chromiumembedded/cef/issues/2400/scroll-wheel-becomes-non-functional-with#comment-44369181

https://bitbucket.org/chromiumembedded/cef/issues/2214/osr-scroll-is-erratic-after-using-mouse

https://bitbucket.org/chromiumembedded/cef/issues/2438/osr-mouse-wheel-scrolling-sometimes-stop
@amaitland
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--disable-features is already set and as such won't be overridden with the current implementation see https://github.com/cefsharp/CefSharp/blob/master/CefSharp.Core/Internals/CefSharpApp.h#L115

@amaitland amaitland added this to the 65.0.0 milestone Jun 12, 2018
@amaitland amaitland mentioned this issue Jun 12, 2018
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@amaitland
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Looks like disabling TouchpadAndWheelScrollLatching resolves the problem.

Upstream PR to resolve the problem was submitted a few days ago https://bitbucket.org/chromiumembedded/cef/pull-requests/167/add-mousewheelphasehandler-for-osr-issue/diff

amaitland added a commit that referenced this issue Jun 20, 2018
@amaitland
WPF - Mouse Scroll becomes unresponsive
3b6ff2f 
Add Hack to CefSharpApp to allow for setting of disable-features command line arg
Add the example command line args
#2408
amaitland added a commit that referenced this issue Jun 20, 2018
@amaitland
WPF - Mouse Scroll becomes unresponsive
4be4ebd 
Add Hack to CefSharpApp to allow for setting of disable-features command line arg
Add the example command line args
#2408
amaitland added a commit that referenced this issue Jun 25, 2018
@amaitland
WPF - DisableTouchpadAndWheelScrollLatching
fda291b 
In ChromiumWebBrowser disable by default when default call to Cef.Initialize

Issue #2408
@amaitland
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Helper method added in 65.0.0-pre02

var settings = new CefSettings();
settings.DisableTouchpadAndWheelScrollLatching();

See fda291b#diff-8504643e16a7bcd2d9428f463a767ff9R111 for an example. This only been added to the cefsharp/65 branch as I'm hoping the issue will be resolved upstream shortly.

@amaitland amaitland removed the blocking label Jul 6, 2018
@amaitland
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disable-threaded-scrolling might be worth a try if using SendMouseWheelEvent in WinForms.

@amaitland
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--disable-threaded-scrolling=1 --disable-features=TouchpadAndWheelScrollLatching,AsyncWheelEvents together might also be required for WPF/OffScreen as per https://bitbucket.org/chromiumembedded/cef/issues/2214/osr-scroll-is-erratic-after-using-mouse#comment-45970697

@amaitland amaitland mentioned this issue Jul 11, 2018
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@amaitland
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Changes have been merged into CEF master, they will only appear in version 69. Relevant commit https://bitbucket.org/chromiumembedded/cef/commits/fad6aec5d0f02853ff6b8af403c5b75d4764e3cb

@amaitland amaitland modified the milestones: 65.0.0, 69.0.0 Jul 18, 2018
@amaitland amaitland added wpf WPF Implementation offscreen labels Jul 27, 2018
@amaitland amaitland mentioned this issue Jul 27, 2018
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@mskmar mskmar mentioned this issue Jul 27, 2018
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@amaitland amaitland modified the milestones: 69.0.0, 67.0.0 Aug 2, 2018
@amaitland
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With #2477 the values to workaround this issue will be set by default. Will be officially fixed in 69, with the workaround enabled in 67.

amaitland added a commit that referenced this issue Sep 10, 2018
@amaitland
Wpf CefSettings - Remove TouchpadAndWheelScrollLatching disabled feature
55d31a2 
Should officially resolve #2408
@amaitland
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The AsyncWheelEvents and TouchpadAndWheelScrollLatching feature flags have been removed from Chromium in https://crrev.com/e6d81f47c87.

https://bitbucket.org/chromiumembedded/cef/issues/2214/osr-scroll-is-erratic-after-using-mouse#comment-46738015

@mjkkirschner mjkkirschner mentioned this issue Mar 27, 2020
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