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Gtk3Theme: set XCURSOR_SIZE and XCURSOR_THEME for wayland sessions 

GNOME doesn't set these for Wayland session and without those env
variables set users might experience broken cursor with Qt apps
as QWayland reads them to setup QWaylandInputDevice.

There is no cursor protocol available on Wayland yet, see also
https://gitlab.freedesktop.org/wayland/wayland-protocols/-/issues/58

Qt Wayland QPA plugin still tries to load from those two envs.

Fixes: QTBUG-67579
Fixes: QTBUG-87778
Pick-to: 6.4 6.2 5.15
Change-Id: I4e7f6871b56599170b12e796858238b1df6d47d1
Reviewed-by: Liang Qi <liang.qi@qt.io>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
bb10
Jan Grulich 2022-01-11 15:38:08 +01:00 committed by Liang Qi
parent 02b9033d50
commit c0b0c7bebb
1 changed files with 14 additions and 0 deletions
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14
src/plugins/platformthemes/gtk3/qgtk3theme.cpp
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@ -102,6 +102,20 @@ QGtk3Theme::QGtk3Theme()
SETTING_CONNECT("gtk-application-prefer-dark-theme");
SETTING_CONNECT("gtk-theme-name");
#undef SETTING_CONNECT
/* Set XCURSOR_SIZE and XCURSOR_THEME for Wayland sessions */
if (QGuiApplication::platformName().startsWith("wayland"_L1)) {
if (qEnvironmentVariableIsEmpty("XCURSOR_SIZE")) {
const int cursorSize = gtkSetting<gint>("gtk-cursor-theme-size");
if (cursorSize > 0)
qputenv("XCURSOR_SIZE", QString::number(cursorSize).toUtf8());
}
if (qEnvironmentVariableIsEmpty("XCURSOR_THEME")) {
const QString cursorTheme = gtkSetting("gtk-cursor-theme-name");
if (!cursorTheme.isEmpty())
qputenv("XCURSOR_THEME", cursorTheme.toUtf8());
}
}
}
static inline QVariant gtkGetLongPressTime()