[KDE/Mac] Review Request 126198: [OS X] adaptations for the KdePlatformTheme

Martin Gräßlin mgraesslin at kde.org
Tue May 17 18:45:33 UTC 2016

> On May 17, 2016, 4:36 p.m., Martin Gräßlin wrote:
> > > I saw that one of the justifications for the move was a dependency on Plasma library/ies, but I don't see any such dependencies in the latest version before the move (commit 07548ac1fe7a7fb31a941473911e982fb623c07d).
> > 
> > of course there were, they just were not properly specified. See for example https://quickgit.kde.org/?p=plasma-integration.git&a=commit&h=70049ac737aad8a8a6e5025fdd326981959c70fd which fixes the not specified dependency to breeze.
> René J.V. Bertin wrote:
>     Does the code really depend on Breeze in a different way than it depends on Oxygen? And wouldn't you have achieved the same insurance of having Breeze installed with only the change in the CMake file, or is there an actual possibility that someone may install the theme under a different name?

> Does the code really depend on Breeze in a different way than it depends on Oxygen?

Yes it's different in the way that Breeze is set as the default style. Because of that it's defined as a hard build dependency. But you are right for Oxygen we also need to implement the support to find it as an (optional) build dependency.

> And wouldn't you have achieved the same insurance of having Breeze installed with only the change in the CMake file, or is there an actual possibility that someone may install the theme under a different name?

Yes the important part is the CMake file, so that we can depend on it. The change to using the defined name is a lesson learned from the switch from Oxygen to Breeze which is in many places still hard coded in an incorrect way. By making it a proper dependency the next switch will be easier in future. One removes the Breeze dep and you get nice compile errors.

- Martin

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On May 16, 2016, 9:49 p.m., René J.V. Bertin wrote:
> -----------------------------------------------------------
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> https://git.reviewboard.kde.org/r/126198/
> -----------------------------------------------------------
> (Updated May 16, 2016, 9:49 p.m.)
> Review request for KDE Software on Mac OS X, KDE Frameworks, Plasma, and Valorie Zimmerman.
> Repository: frameworkintegration
> Description
> -------
> The KdePlatformTheme plugin can be enabled on OS X with a minimal patch to Qt5; all that is required is to include the `qgenericunixservices` and `qgenericunixthemes` components in the build, and to append `"kde"` to the list returned by `QCocoaIntegration::themeNames()` for instance under the condition that `KDE_SESSION_VERSION` is set to a suitable value in the environment.
> This will allow KF5 and Qt5 applications to use the theme selected through KDE if FrameworkIntegration is installed and KDE_SESSION_VERSION is set, which seems like a sufficiently specific set of conditions that is easy to avoid by users who prefer to use the Mac native theme.
> While requestion the KDE theme is also possible through `-style kde` or `env QT_STYLE_OVERRIDE=kde` the use of the KdePlatformTheme plugin appears to be the only way to get the full theme, including the font and colour selection. In my opinion it is above all the font customisation which is a very welcome feature for Qt/Mac; by default Qt applications use the default system font (Lucida Grande 13pt or even 14pt) throughout. This is a good UI font, but not at that size (and most "native" OS X applications indeed use a range of smaller sizes, depending on role.
> It does have introduce a number of regressions, which the current patch aims to address. The most visible and problematic of these regressions is the loss of the Mac-style menu bar and thus of all menu items (actions).
> The fix is straightforward : on OS X (and similarly affected platforms?), an instance of the native Cocoa platform theme is created through the private API, and used as a fallback rather than immediately falling back to the default implementations from `QPlatformTheme`. In addition, methods missing from (not overridden by) `KdePlatformTheme` are provided on OS X and call the corresponding methods from the native theme. It is this change which restores the menubar and even the Dock menu functionality.
> One minor regression remains but should be easy to fix (elsewhere?): the Preferences menu loses its keyboard shortcut (Command-,).
> Given the fallback nature of the native platform instance I have preferred to print a warning rather than using something like `qFatal`, above all because the message printed by qFatal tends to get lost on OS X. I can replace my use of `qWarning` with a dialog giving the choice between continuing or exiting the application - code that would be called in the menu methods because only there is it certain that the application actually needs a menubar.
> In line with experience and feedback from the KDE(4)-Mac community I have decided to force the use of native dialogs rather than the ones from the KdePlatformPlugin.
> In addition I set the fallback value for `ShowIconsOnPushButtons` to false in line with platform guidelines, and ensure that the autotests are not built as app bundles.
> Diffs
> -----
>   CMakeLists.txt 6ea1cba 
>   src/CMakeLists.txt 1c54eb2 
>   src/platformtheme/CMakeLists.txt PRE-CREATION 
>   src/platformtheme/config-platformtheme.h.cmake PRE-CREATION 
>   src/platformtheme/frameworksintegration-5.16-font.sh PRE-CREATION 
>   src/platformtheme/frameworksintegration-5.16-font.upd PRE-CREATION 
>   src/platformtheme/kdemactheme.h PRE-CREATION 
>   src/platformtheme/kdemactheme.mm PRE-CREATION 
>   src/platformtheme/kdeplatformfiledialogbase.cpp PRE-CREATION 
>   src/platformtheme/kdeplatformfiledialogbase_p.h PRE-CREATION 
>   src/platformtheme/kdeplatformfiledialoghelper.h PRE-CREATION 
>   src/platformtheme/kdeplatformfiledialoghelper.cpp PRE-CREATION 
>   src/platformtheme/kdeplatformsystemtrayicon.h PRE-CREATION 
>   src/platformtheme/kdeplatformsystemtrayicon.cpp PRE-CREATION 
>   src/platformtheme/kdeplatformtheme.h PRE-CREATION 
>   src/platformtheme/kdeplatformtheme.cpp PRE-CREATION 
>   src/platformtheme/kdeplatformtheme.json PRE-CREATION 
>   src/platformtheme/kdirselectdialog.cpp PRE-CREATION 
>   src/platformtheme/kdirselectdialog_p.h PRE-CREATION 
>   src/platformtheme/kfiletreeview.cpp PRE-CREATION 
>   src/platformtheme/kfiletreeview_p.h PRE-CREATION 
>   src/platformtheme/kfontsettingsdata.h PRE-CREATION 
>   src/platformtheme/kfontsettingsdata.cpp PRE-CREATION 
>   src/platformtheme/kfontsettingsdatamac.h PRE-CREATION 
>   src/platformtheme/kfontsettingsdatamac.mm PRE-CREATION 
>   src/platformtheme/khintssettings.h PRE-CREATION 
>   src/platformtheme/khintssettings.cpp PRE-CREATION 
>   src/platformtheme/khintssettingsmac.h PRE-CREATION 
>   src/platformtheme/khintssettingsmac.mm PRE-CREATION 
>   src/platformtheme/main_mac.cpp PRE-CREATION 
> Diff: https://git.reviewboard.kde.org/r/126198/diff/
> Testing
> -------
> On Mac OS X with Qt 5.5.1, KF5 frameworks 5.16.0 and QtCurve git/head.
> I have not verified to what extent my use of a private `QGuiApplication` API links builds to a specific Qt version (I consider that nothing shocking and a minor price to pay).
> >>> Do I need to add some glue to the CMake file so that it will warn if the private headerfiles are not available? Apparently no changes were required to find them.
> File Attachments
> ----------------
> purely native OS X theme
>   https://git.reviewboard.kde.org/media/uploaded/files/2015/11/30/650d0da7-52b3-40d1-a1f9-cb610494cf77__Screen_Shot_2015-11-30_at_15.42.31.png
> native theme but with `-style kde`
>   https://git.reviewboard.kde.org/media/uploaded/files/2015/11/30/72e2a6aa-2a7c-465b-b404-fc1e52b6fc69__Screen_Shot_2015-11-30_at_15.43.02.png
> using the KDEPlatformTheme
>   https://git.reviewboard.kde.org/media/uploaded/files/2015/11/30/309e5995-74fa-42fb-a6f3-936cedbf5246__Screen_Shot_2015-11-30_at_15.43.31.png
> on Linux, using a purely "native" theme
>   https://git.reviewboard.kde.org/media/uploaded/files/2015/11/30/eaa1d907-bf05-4ca2-821b-83dc062aea04__QtCreatorNativeLNX.png
> KDEPlatformTheme with the "macintosh" native theme selected
>   https://git.reviewboard.kde.org/media/uploaded/files/2015/12/01/de55a91f-3500-4db8-8a3b-d252fd7ea169__Screen_Shot_2015-12-01_at_13.52.35.png
> kate built by Christoph Cullman as a completely standalone app bundle
>   https://git.reviewboard.kde.org/media/uploaded/files/2015/12/12/d5f9a983-a077-4a52-913e-5d980e62daca__kate-Cullmans-appbundle.png
> kate/MacPorts in fully native Mac mode (but using XDG-compliant QSPs).
>   https://git.reviewboard.kde.org/media/uploaded/files/2015/12/12/02dbfc58-445c-48f5-88ad-33b5ab55571a__kate-MP-fullnative.png
> kate/MacPorts using the QtCurve style (but the native platform plugin)
>   https://git.reviewboard.kde.org/media/uploaded/files/2015/12/12/c9d1e28e-6684-4ae3-b05d-1fbc6cde39f4__kate-MP-QtCurveStyle.png
> kate/MacPorts using the KdeMacTheme plugin and the macintosh style
>   https://git.reviewboard.kde.org/media/uploaded/files/2015/12/12/76b1305e-0bf2-4073-a61f-4df59435a198__Kate-MP-plplug-MacStyle.png
> kate/MacPorts using the KdeMacTheme plugin and the QtCurve style
>   https://git.reviewboard.kde.org/media/uploaded/files/2015/12/12/ad54fdf3-a450-4d0b-8a60-8962f537ed6f__kate-MP-plplug-QtCurve.png
> Thanks,
> René J.V. Bertin

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