Use TDESKTOP_USE_GTK_FILE_DIALOG in snap

snap/snapcraft.yaml

@@ -18,9 +18,6 @@ apps:
     command: telegram-launch
     common-id: org.telegram.desktop
     desktop: share/applications/telegramdesktop.desktop
-    environment:
-      # Use GTK3 cursor theme, icon theme and open/save file dialogs.
-      QT_QPA_PLATFORMTHEME: gtk3
     extensions:
       - kde-neon
     plugs:
@@ -87,6 +84,7 @@ parts:
       - libssl-dev
       - zlib1g-dev
     stage-packages:
+      - libgtk-3-0
       - liblzma5
     configflags:
       - -DCMAKE_C_COMPILER=gcc-8
@@ -98,6 +96,7 @@ parts:
       - -DDESKTOP_APP_USE_PACKAGED_LAZY=ON
       - -DDESKTOP_APP_USE_PACKAGED_FONTS=OFF
       - -DTDESKTOP_USE_FONTCONFIG_FALLBACK=ON
+      - -DTDESKTOP_USE_GTK_FILE_DIALOG=ON
     override-pull: |
       snapcraftctl pull
 
@@ -366,33 +365,6 @@ parts:
       - -./lib/cmake
       - -./lib/pkgconfig
 
-  qgnomeplatform:
-    source: https://github.com/FedoraQt/QGnomePlatform.git
-    source-depth: 1
-    source-tag: 0.6.0
-    plugin: dump
-    build-snaps:
-      - kde-frameworks-5-core18-sdk
-      - kde-frameworks-5-core18
-    build-packages:
-      - libglvnd-dev
-      - libgtk-3-dev
-    stage-packages:
-      - libgtk-3-0
-      - cinnamon-desktop-data
-    override-build: |
-      KF5_DIR=/snap/kde-frameworks-5-core18-sdk/current
-
-      $KF5_DIR/usr/lib/qt5/bin/qmake -qtconf "$SNAPCRAFT_STAGE/qt.conf"
-      make -j$(nproc)
-      make INSTALL_ROOT="$SNAPCRAFT_PART_INSTALL/tmp" install
-
-      cp -a "$SNAPCRAFT_PART_INSTALL/tmp/$KF5_DIR/." "$SNAPCRAFT_PART_INSTALL"
-      rm -r "$SNAPCRAFT_PART_INSTALL/tmp"
-    after:
-      - qtconf
-      - qtwayland
-
   qtimageformats:
     source: https://github.com/qt/qtimageformats.git
     source-depth: 1