[Qemu-devel] [PATCH v2 2/3] ui: fix icon display for GTK frontend under GNOME Shell with Wayland

["Daniel P. Berrangé" <berrange@redhat.com>]

The icon associated with a GtkWindow is just a hint to window managers
and not all of them will honour it. Some will instead want to show the
icon listed by the .desktop file. The desktop file is located based on
the application ID, which is set using g_set_prgname. QEMU has not
historically provided a desktop file or set its app ID, so it got a
broken icon in GNOME shell, which is now fixed.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 Makefile        | 3 +++
 configure       | 2 ++
 ui/gtk.c        | 1 +
 ui/qemu.desktop | 8 ++++++++
 4 files changed, 14 insertions(+)
 create mode 100644 ui/qemu.desktop

diff --git a/Makefile b/Makefile
index 6dd82f2eb8..f12e935c46 100644
--- a/Makefile
+++ b/Makefile
@@ -751,6 +751,9 @@ endif
 	mkdir -p "$(DESTDIR)/$(qemu_icondir)/hicolor/scalable/apps"; \
 	$(INSTALL_DATA) $(SRC_PATH)/ui/icons/qemu.svg \
 		"$(DESTDIR)/$(qemu_icondir)/hicolor/scalable/apps/qemu.svg"
+	mkdir -p "$(DESTDIR)/$(qemu_desktopdir)"
+	$(INSTALL_DATA) $(SRC_PATH)/ui/qemu.desktop \
+		"$(DESTDIR)/$(qemu_desktopdir)/qemu.desktop"
 ifdef CONFIG_GTK
 	$(MAKE) -C po $@
 endif
diff --git a/configure b/configure
index c1e1e05b5a..97918ba09c 100755
--- a/configure
+++ b/configure
@@ -5762,6 +5762,7 @@ qemu_moddir=$libdir$confsuffix
 qemu_datadir=$datadir$confsuffix
 qemu_localedir="$datadir/locale"
 qemu_icondir="$datadir/icons"
+qemu_desktopdir="$datadir/applications"
 
 # We can only support ivshmem if we have eventfd
 if [ "$eventfd" = "yes" ]; then
@@ -6229,6 +6230,7 @@ fi
 echo "qemu_helperdir=$libexecdir" >> $config_host_mak
 echo "qemu_localedir=$qemu_localedir" >> $config_host_mak
 echo "qemu_icondir=$qemu_icondir" >> $config_host_mak
+echo "qemu_desktopdir=$qemu_desktopdir" >> $config_host_mak
 echo "libs_softmmu=$libs_softmmu" >> $config_host_mak
 echo "GIT=$git" >> $config_host_mak
 echo "GIT_SUBMODULES=$git_submodules" >> $config_host_mak
diff --git a/ui/gtk.c b/ui/gtk.c
index ec63befa16..87c0e33d2a 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -2226,6 +2226,7 @@ static void gtk_display_init(DisplayState *ds, DisplayOptions *opts)
 
     theme = gtk_icon_theme_get_default();
     gtk_icon_theme_prepend_search_path(theme, CONFIG_QEMU_ICONDIR);
+    g_set_prgname("qemu");
 
     s->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
     s->vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
diff --git a/ui/qemu.desktop b/ui/qemu.desktop
new file mode 100644
index 0000000000..20f09f56be
--- /dev/null
+++ b/ui/qemu.desktop
@@ -0,0 +1,8 @@
+[Desktop Entry]
+Version=1.0
+Name=QEMU
+Icon=qemu
+Type=Application
+Terminal=false
+Keywords=Emulators;Virtualization;KVM;
+NoDisplay=true
-- 
2.19.2