moved cli and zenity frontend to their own files

[lilass.git] / zenity_frontend.py

diff --git a/zenity_frontend.py b/zenity_frontend.py
new file mode 100644 (file)
index 0000000..7dd4d82
--- /dev/null
+++ b/zenity_frontend.py
@@ -0,0 +1,50 @@
+# DSL - easy Display Setup for Laptops
+# Copyright (C) 2012-2015 Ralf Jung <post@ralfj.de>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+# interactive zenity interface, question based
+
+from question_frontend import QuestionFrontend
+from screen import processOutputIt
+
+import subprocess
+
+class ZenityFrontend(QuestionFrontend):
+    def error(self, message):
+        '''Displays a fatal error to the user'''
+        subprocess.check_call(["zenity", "--error", "--text="+message])
+
+    def userChoose (self, title, choices, returns, fallback):
+        assert len(choices) == len(returns)
+        args = ["zenity", "--list", "--text="+title, "--column="]+choices
+        switch = dict (list(zip (choices,returns)))
+        try:
+            for line in processOutputIt(*args):
+                return switch.get(line.strip(), fallback)
+        except Exception:
+            # on user cancel, the return code of zenity is nonzero
+            return fallback
+        # if the output was empty
+        return fallback
+
+    def isAvailable():
+        try:
+            processOutputIt("zenity", "--version")
+            return True
+        except FileNotFoundError:
+            return False
+        except PermissionError:
+            return False