Only define ShortcutsWindow if Gtk.ShortcutsWindow exists. Fixes #124

1 files changed, 58 insertions, 54 deletions

diff --git a/voctogui/lib/shortcuts.py b/voctogui/lib/shortcuts.py
index d591a03..d5fbc91 100644
--- a/voctogui/lib/shortcuts.py
+++ b/voctogui/lib/shortcuts.py
@@ -3,57 +3,61 @@ from gi.repository import Gtk
 from lib.config import Config
 
 
-class ShortcutsWindow(Gtk.ShortcutsWindow):
-    def __init__(self, win):
-        Gtk.ShortcutsWindow.__init__(self)
-        self.build()
-        self.set_position(Gtk.WindowPosition.CENTER_ALWAYS)
-        self.set_transient_for(win)
-        self.set_modal(True)
-
-    def build(self):
-        section = Gtk.ShortcutsSection()
-        section.show()
-
-        compose_group = Gtk.ShortcutsGroup(title="Composition modes")
-        compose_group.show()
-        for accel, desc in [("F1", "Select fullscreen mode"),
-                            ("F2", "Select Picture in Picture mode"),
-                            ("F3", "Select  Side-by-Side Equal mode"),
-                            ("F4", "Select  Side-by-Side Preview mode")]:
-            short = Gtk.ShortcutsShortcut(title=desc, accelerator=accel)
-            short.show()
-            compose_group.add(short)
-        section.add(compose_group)
-
-        source_group = Gtk.ShortcutsGroup(title="Source Selection")
-        source_group.show()
-        num = len(Config.getlist('mix', 'sources'))
-        source_items = [
-            ("1...{}".format(num), "Select Source as A-Source"),
-            ("<ctrl>1...<ctrl>{}".format(num), "Select Source as B-Source"),
-            ("<alt>1...<alt>{}".format(num), "Select Source as Fullscreen")
-        ]
-        for accel, desc in source_items:
-            short = Gtk.ShortcutsShortcut(title=desc, accelerator=accel)
-            short.show()
-            source_group.add(short)
-        section.add(source_group)
-
-        if Config.getboolean('misc', 'cut'):
-            other_group = Gtk.ShortcutsGroup(title="Other")
-            other_group.show()
-            short = Gtk.ShortcutsShortcut(title="Send Cut message",
-                                          accelerator="t")
-            short.show()
-            other_group.add(short)
-            section.add(other_group)
-
-        self.add(section)
-
-
-def show_shortcuts(win):
-    if not hasattr(Gtk, "ShortcutsWindow"):
-        return
-    shortcuts_window = ShortcutsWindow(win)
-    shortcuts_window.show()
+if hasattr(Gtk, "ShortcutsWindow"):
+    def show_shortcuts(win):
+        shortcuts_window = ShortcutsWindow(win)
+        shortcuts_window.show()
+
+    class ShortcutsWindow(Gtk.ShortcutsWindow):
+        def __init__(self, win):
+            Gtk.ShortcutsWindow.__init__(self)
+            self.build()
+            self.set_position(Gtk.WindowPosition.CENTER_ALWAYS)
+            self.set_transient_for(win)
+            self.set_modal(True)
+
+        def build(self):
+            section = Gtk.ShortcutsSection()
+            section.show()
+
+            compose_group = Gtk.ShortcutsGroup(title="Composition modes")
+            compose_group.show()
+            for accel, desc in [("F1", "Select fullscreen mode"),
+                                ("F2", "Select Picture in Picture mode"),
+                                ("F3", "Select  Side-by-Side Equal mode"),
+                                ("F4", "Select  Side-by-Side Preview mode")]:
+                short = Gtk.ShortcutsShortcut(title=desc, accelerator=accel)
+                short.show()
+                compose_group.add(short)
+            section.add(compose_group)
+
+            source_group = Gtk.ShortcutsGroup(title="Source Selection")
+            source_group.show()
+            num = len(Config.getlist('mix', 'sources'))
+            source_items = [
+                ("1...{}".format(num),
+                 "Select Source as A-Source"),
+                ("<ctrl>1...<ctrl>{}".format(num),
+                 "Select Source as B-Source"),
+                ("<alt>1...<alt>{}".format(num),
+                 "Select Source as Fullscreen")
+            ]
+            for accel, desc in source_items:
+                short = Gtk.ShortcutsShortcut(title=desc, accelerator=accel)
+                short.show()
+                source_group.add(short)
+            section.add(source_group)
+
+            if Config.getboolean('misc', 'cut'):
+                other_group = Gtk.ShortcutsGroup(title="Other")
+                other_group.show()
+                short = Gtk.ShortcutsShortcut(title="Send Cut message",
+                                              accelerator="t")
+                short.show()
+                other_group.add(short)
+                section.add(other_group)
+
+            self.add(section)
+else:
+    def show_shortcuts(win):
+        pass