Issue #230 - Remove window shadow if --no-window-shadow arg is supplied

data/styles/preferences.css

@@ -3,3 +3,6 @@
 .app-box {
     box-shadow: 0 0 7px rgba(0, 0, 0, 0.4);
 }
+.no-window-shadow {
+    box-shadow: none;
+}

data/themes/adwaita/theme.css

@@ -78,8 +78,4 @@
 }
 .prefs-btn:hover {
     background-color: @prefs_backgroud;
-}
-
-.no-window-shadow {
-    margin: -20px;
-}
+}

data/themes/dark/theme.css

@@ -78,8 +78,4 @@
 }
 .prefs-btn:hover {
     background-color: @prefs_backgroud;
-}
-
-.no-window-shadow {
-    margin: -20px;
-}
+}

data/themes/light/theme.css

@@ -36,6 +36,9 @@
     border: 1px solid @window_border_color;
     border-radius: 4px;
 }
+.no-window-shadow {
+    box-shadow: none;
+}
 
 .input {
     color: @input_color;
@@ -100,8 +103,4 @@
 }
 .prefs-btn:hover {
     background-color: @prefs_backgroud;
-}
-
-.no-window-shadow {
-    margin: -20px;
-}
+}

data/themes/ubuntu/theme.css

@@ -78,8 +78,4 @@
 }
 .prefs-btn:hover {
     background-color: @prefs_backgroud;
-}
-
-.no-window-shadow {
-    margin: -20px;
-}
+}

ulauncher/ui/windows/PreferencesUlauncherDialog.py

@@ -109,13 +109,19 @@ def finish_initializing(self, builder):
 
         self.settings = Settings.get_instance()
         self._init_webview()
+        self._handle_no_window_shadow_option(self.ui['window_wrapper'])
         self.init_styles(get_data_file('styles', 'preferences.css'))
         self.autostart_pref = AutostartPreference()
         self.hotkey_dialog = HotkeyDialog()
         self.hotkey_dialog.connect('hotkey-set', self.on_hotkey_set)
 
         self.show_all()
 
+    def _handle_no_window_shadow_option(self, window_wrapper):
+        # removing window shadow solves issue with DEs without a compositor (#230)
+        if get_options().no_window_shadow:
+            window_wrapper.get_style_context().add_class('no-window-shadow')
+
     def _init_webview(self):
         """
         Initialize preferences WebView