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cztomczak
Touch screen support
In CEF 3 we can enable touch events by setting the "touch-events" command line switch [2] to "auto" or "enabled", it can be done through CefApp::OnBeforeCommandLineProcessing() [3], we need to implement the CefApp API.
See Issue 786 "Touch support in CEF1 and CEF3 does not match Chromium browser" [4] in the CEF Issue Tracker for more details on touch screen support in CEF 1 and CEF 3.
See also RegisterTouchWindow() [5] on the MSDN, it might be required to call this function for the main window.
Apparently multitouch works in the cefclient sample application in CEF 3, reported in this topic "Windows touch scroll acting as mouse click event" [6] on the CEF forum. Can someone confirm that?
[1] https://code.google.com/p/chromiumembedded/source/browse/trunk/cef1/libcef/brows er_webkit_init.cc?r=1256#51 [2] https://code.google.com/p/chromium/codesearch#chromium/src/ui/base/ui_base_switc hes.cc&sq=package:chromium&type=cs&l=66&rcl=1369373180 [3] https://code.google.com/p/chromiumembedded/source/browse/trunk/cef3/include/cef_ app.h?r=1256#117 [4] https://code.google.com/p/chromiumembedded/issues/detail?id=786 [5] http://msdn.microsoft.com/en-us/library/windows/desktop/dd317326(v=vs.85).aspx [6] http://www.magpcss.org/ceforum/viewtopic.php?f=6&t=10321
Original issue reported on code.google.com by [email protected] on 24 May 2013 at 4:03
When clicking an edit field there is no virtual keyboard appearing, but this could be implemented on your own by injecting javascript on web pages through LoadHandler.OnLoadStart() or OnLoadEnd(), the same can be done for other touch related behavior, when --touch-events=enabled flag is passed then javascript touch events will be enabled (touchstart, touchend, touchmove), allowing you to override the default behavior or implement the missing one.
Original comment by [email protected] on 1 Jun 2013 at 9:33
When switches are set programatically they must be set in two places:
- CefApp::OnBeforeCommandLineProcessing()
- CefBrowserProcessHandler::OnBeforeChildProcessLaunch()
Original comment by [email protected] on 13 Jun 2013 at 7:15
There is no touch support on Linux yet? https://groups.google.com/a/chromium.org/d/topic/chromium-discuss/p_mI45gP7q8/discussion
Original comment by [email protected] on 15 Nov 2013 at 9:05
See Issue 101 (Linux and Aura).
Michael Goffioul has created a port of CEF with Aura support, that adds multitouch support on Linux. See the topic: https://groups.google.com/d/topic/cefpython/qMB6D8xWBC8/discussion
Original comment by [email protected] on 8 Jan 2014 at 4:01
See issue 1059 in CEF Issue Tracker:
"Cef3: Multi-touch support with offscreen rendering." https://code.google.com/p/chromiumembedded/issues/detail?id=1059
In comment #7 there is an initial patch for Windows.
Original comment by [email protected] on 8 Jan 2014 at 4:14
CEF Python supports setting command line switches programmatically, see Issue 65. This is in regards to the --touch-events=enabled flag.
Original comment by [email protected] on 8 Jan 2014 at 4:18
Touch screen long press will be killed, is it because of this? tips wrong libcef.dll APPCRASH on windows
What is the current state of work on this issue? I don't see any documentation related to --touch-events=enabled, or touch related events/methods in the Browser API (alongside SendMouse... events). Does --touch-events=enabled have any effect in OSR cefpython?
