April 2016 - Xquartz-dev - lists.macosforge.org

Resend: Modifying the default keys for copy and paste
by from＠alumni.stanford.edu 22 Apr '16

22 Apr '16

Dear XQuartz developers, I have a class where the majority of students are using Macs and XQuartz to interact with an app running on Linux. They are developing code with the app, so are doing a lot of copying and pasting. The students are used to using Cmd-C and Cmd-V to copy and paste, but the app expects Ctrl-C and Ctrl-V. Googling how to map the keys led to your website, where I tried the solution offered at https://xquartz.macosforge.org/trac/ticket/398 which is to have the students use this .Xmodmap file clear mod2 clear control keycode 63 = Control_L keycode 67 = Control_L keycode 71 = Control_L add control = Control_L Unfortunately, this doesn't work. I'm sure this is a commonly desired functionality and there must be a solution. Could you please tell me how to accomplish this key mapping. These are our XQuartz Pasteboard settings: Enable syncing: y Update Pasteboard when CLIPBOARD changes: n Update CLIPBOARD when Pasteboard changes: y Update PRIMARY (middle-click) when Pasteboard changes: y Update Pasteboard immediately when new text is selected: n Many thanks, Bill

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Modifying the default keys for copy and paste
by from＠alumni.stanford.edu 14 Apr '16

14 Apr '16

Dear XQuartz developers, I have a class where the majority of students are using Macs and XQuartz to interact with an app running on Linux. They are developing code with the app, so are doing a lot of copying and pasting. The students are used to using Cmd-C and Cmd-V to copy and paste, but the app expects Ctrl-C and Ctrl-V. Googling how to map the keys led to your website, where I tried the solution offered at https://xquartz.macosforge.org/trac/ticket/398 which is to have the students use this .Xmodmap file clear mod2 clear control keycode 63 = Control_L keycode 67 = Control_L keycode 71 = Control_L add control = Control_L Unfortunately, this doesn't work. I'm sure this is a commonly desired functionality and there must be a solution. Could you please tell me how to accomplish this key mapping. These are our XQuartz Pasteboard settings: Enable syncing: y Update Pasteboard when CLIPBOARD changes: n Update CLIPBOARD when Pasteboard changes: y Update PRIMARY (middle-click) when Pasteboard changes: y Update Pasteboard immediately when new text is selected: n Many thanks, Bill

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Re: [Xquartz-dev] Class unable to view Qt5 Linux app using XQuartz
by from＠alumni.stanford.edu 13 Apr '16

13 Apr '16

Dear XQuartz Developers, I followed your advice and emailed the Qt mailing list. They looked at the source code and are quite confident the the problem is with XQuartz. My class is using XQuartz 2.7.8. We are logging into RHEL 6 using ssh -Y forwarding (problem also with -X). Our system has Qt5 version 5.4.0 and libX11 version 1.6.3. I can provide you with any other information you need. Our students with Linux and Windows laptops aren't having any problem, just those with Macs using XQuartz. I would greatly appreciate your help in fixing the problem. This is week 3 of our 10-week quarter. Many thanks, Bill On Apr 12, 2016, at 10:22 AM, Thiago Macieira <thiago.macieira(a)intel.com> wrote: Interesting. Well, looking at the source code, it seems that Qt is simply trying to set the selection owner for the given atom and failing. I see no reason *how* this can be Qt's fault. Have you reported this as a bug? If not, please do and explain that it happens when ssh'ing from a Mac machine using XQuartz to a Linux one. Please include the SSH X11 forwarding configuration you're using (-X or -Y option or whatever) and whether other, non-Qt5 applications can set the clipboard. A good test is to run the xsel tool to get and set the clipboards. -- Thiago Macieira - thiago.macieira (AT) intel.com Software Architect - Intel Open Source Technology Center On Apr 8, 2016, at 6:12 PM, Jeremy Huddleston Sequoia <jeremyhu(a)apple.com> wrote: Those look like errors coming out of Qt, so I'd certainly start with a Qt mailing list. On Apr 8, 2016, at 14:57, from(a)alumni.stanford.edu wrote: Dear XQuartz Developers, I'm teach a class this quarter at Stanford where the main software package we are using is running on Linux (RHEL 6). The application uses Qt5. The students with Windows and Linux laptops are able to view the GUI just fine, but the students with Macs using XQuartz (the majority) are having problems. In particular, when the students try to do a copy, they get the error message QXcbClipboard::setMimeData: Cannot set X11 selection owner and the copy doesn't work. When they quit the application, they get the additional message QApplication::qAppName: Please instantiate the QApplication object first Do any of you have any ideas on how we could fix this? Not being able to copy is a big disadvantage to code development. Many thanks! Bill _______________________________________________ Xquartz-dev mailing list Xquartz-dev(a)lists.macosforge.org https://lists.macosforge.org/mailman/listinfo/xquartz-dev _______________________________________________ Xquartz-dev mailing list Xquartz-dev(a)lists.macosforge.org https://lists.macosforge.org/mailman/listinfo/xquartz-dev

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(no subject)
by from＠alumni.stanford.edu 09 Apr '16

09 Apr '16

Jeremy, Good, thanks for helping to understand the source of the problem. I’ll send an email to the Qt mailing list. Many thanks, Bill On Apr 8, 2016, at 6:12 PM, Jeremy Huddleston Sequoia <jeremyhu(a)apple.com> wrote: Those look like errors coming out of Qt, so I'd certainly start with a Qt mailing list.

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Class unable to view Qt5 Linux app using XQuartz
by from＠alumni.stanford.edu 09 Apr '16

09 Apr '16

Dear XQuartz Developers, I'm teach a class this quarter at Stanford where the main software package we are using is running on Linux (RHEL 6). The application uses Qt5. The students with Windows and Linux laptops are able to view the GUI just fine, but the students with Macs using XQuartz (the majority) are having problems. In particular, when the students try to do a copy, they get the error message QXcbClipboard::setMimeData: Cannot set X11 selection owner and the copy doesn't work. When they quit the application, they get the additional message QApplication::qAppName: Please instantiate the QApplication object first Do any of you have any ideas on how we could fix this? Not being able to copy is a big disadvantage to code development. Many thanks! Bill

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Xcomposite extension in XQuartz
by John D. Duncan, III 01 Apr '16

01 Apr '16

Hello all. I was wondering if there is any word on the status of getting the COMPOSITE extension built into XQuartz? I personally use a bunch of UNIX-y GUI programs and dockapps (some of them quite old). I've found that, when doing graphically intensive actions (such as quickly scrolling in a unicode-rxvt term, forwarding my SSH session to XQuartz to write LaTeX/use eclipse from our campus workstation computers/submit moodle assignments in firefox), that there is quite a good deal of graphical sluggishness. CPU use does not spike much, so I am assuming that this is a flaw of the X server rendering itself (or perhaps the OS X drivers?). I have somewhat superficial knowledge of the COMPOSITE extension, but I was under the impression that X11 compositors (such as compton) get around this issue by using open-gl/randr rendering as their graphical back-end (among many other hacks). It seems that programs which do use open-gl rendering are unaffected by the sluggishness caused by my dockapss (glxgears, for example). I was also under the impression that most modern UNIX-y Desktop Environments (such as Gnome, KDE, etc.) come with compositors built in (for eye-candy such as v-synch, drop shadows, smooth scrolling, etc.). It seems like adding COMPOSITE extension support could potentially bring over users from other operating systems (especially with the wonderful pkg-src development from Jonathan Perkin at joyent) that could further help re-vitalize the OS X open-source community. I know that, normally, to enable the composite extension in X11 you would just add: Section "Extensions" Option "Composite" "Enable" EndSection to your xorg.conf file. As we know, XQuartz uses a different system where all of the X server extensions are always started on launch (xrandr, etc.) Am I missing something, or is XQuartz still being built without the COMPOSITE extension enabled? I remember reading archives from the past that explained how builds would fail while trying to compile with COMPOSITE support [1]. That was years ago, and I thought there was a modern XQuartz branch that supported the extension..[0] Here are some (bad examples) of the issue that I am talking about: http://cs.gettysburg.edu/~duncjo01/XQuartz.webm http://cs.gettysburg.edu/~duncjo01/XQuartz-glx.webm Notice how, especially in the second screencast, extreme scrolling in the urxvt buffer causes the dockapps to hang, while the glxgears program chugs along at a smooth 60fps. I was hoping that enabling the COMPOSITE extension and using a compositor such as compton could alleviate such issues in the future. Let me apologize in advanced if I have interpreted this issue completely incorrectly; I am no X11 expert. [0]: https://lists.macosforge.org/pipermail/xquartz-changes/2011-May/001054.html [1]: http://lists.apple.com/archives/x11-users/2011/Feb/msg00013.html - John D.

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