Ajout du GUI

kivy/tools/kviewer.py

@@ -0,0 +1,80 @@
+#!/usr/bin/env python
+'''
+KViewer
+=======
+
+KViewer, for KV-Viewer, is a simple tool allowing you to dynamically display
+a KV file, taking its changes into account (thanks to watchdog). The
+idea is to facilitate design using the KV language. It's somewhat related to
+the KivyCatalog demo, except it uses an on-disc file, allowing the user to use
+any editor.
+
+You can use the script as follows::
+
+    python kviewer.py ./test.kv
+
+This will display the test.kv and automatically update the display when the
+file changes.
+
+.. note: This scripts uses watchdog to listen for file changes. To install
+   watchdog::
+
+   pip install watchdog
+
+'''
+
+from sys import argv
+from kivy.lang import Builder
+from kivy.app import App
+from kivy.core.window import Window
+from kivy.clock import Clock, mainthread
+from kivy.uix.label import Label
+
+from watchdog.observers import Observer
+from watchdog.events import FileSystemEventHandler
+from os.path import dirname, basename, join
+
+
+if len(argv) != 2:
+    print('usage: %s filename.kv' % argv[0])
+    exit(1)
+
+
+PATH = dirname(argv[1])
+TARGET = basename(argv[1])
+
+
+class KvHandler(FileSystemEventHandler):
+    def __init__(self, callback, target, **kwargs):
+        super(KvHandler, self).__init__(**kwargs)
+        self.callback = callback
+        self.target = target
+
+    def on_any_event(self, event):
+        if basename(event.src_path) == self.target:
+            self.callback()
+
+
+class KvViewerApp(App):
+    def build(self):
+        o = Observer()
+        o.schedule(KvHandler(self.update, TARGET), PATH)
+        o.start()
+        Clock.schedule_once(self.update, 1)
+        return super(KvViewerApp, self).build()
+
+    @mainthread
+    def update(self, *args):
+        Builder.unload_file(join(PATH, TARGET))
+        for w in Window.children[:]:
+            Window.remove_widget(w)
+        try:
+            Window.add_widget(Builder.load_file(join(PATH, TARGET)))
+        except Exception as e:
+            Window.add_widget(Label(text=(
+                e.message if getattr(e, r'message', None) else str(e)
+            )))
+
+
+if __name__ == '__main__':
+    KvViewerApp().run()