Navigation works!

ui/ui.py

@@ -0,0 +1,72 @@
+import urwid
+from threading import Thread
+
+from asana_service import AsanaService
+
+from ui.task_list import MyTasks, TaskList
+from ui.task_details import TaskDetails
+
+class Ui(object):
+    nav_stack = []
+    def __init__(self, asana_service, update):
+        self.asana_service = asana_service
+        self.update = update
+
+    def my_tasks(self):
+        self.nav_stack.append(('mytasks', None))
+
+        def runInThread():
+            tasks = self.asana_service.get_my_tasks()
+            self.update(MyTasks(tasks, self.task_details).component())
+
+        thread = Thread(target=runInThread())
+        thread.start()
+
+
+    def task_details(self, id):
+        self.nav_stack.append(('task', id))
+        def runInThread():
+            task = self.asana_service.get_task(id)
+            stories = self.asana_service.get_stories(id)
+            self.update(TaskDetails(task,
+                                    stories,
+                                    self.task_details,
+                                    self.task_list,
+                                    None).component())
+        thread = Thread(target=runInThread())
+        thread.start()
+
+    def task_list(self, id):
+        self.nav_stack.append(('project', id))
+        def runInThread():
+            tasks = self.asana_service.get_tasks(id)
+            self.update(TaskList(tasks,
+                                 'TODO: get project name',
+                                 self.task_details
+                                ).component())
+        thread = Thread(target=runInThread())
+        thread.run()
+
+    def go_back(self):
+        if len(self.nav_stack) < 2:
+            return
+
+        self.nav_stack.pop()
+        (location, id) = self.nav_stack.pop()
+        if location == 'mytasks':
+            self.my_tasks()
+        elif location == 'task':
+            self.task_details(id)
+        elif location == 'project':
+            self.task_list(id)
+
+
+def loading():
+    return urwid.Overlay(
+        urwid.BigText('Loading...', urwid.font.HalfBlock5x4Font()),
+        urwid.SolidFill('#'),
+        'center',
+        'pack',
+        'middle',
+        'pack'
+    )