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[rigo] implement UI view changes as a Finite State Machine

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This commit is contained in:
Fabio Erculiani
2012-02-18 14:22:45 +01:00
parent 064f18b719
commit d38cc2befd
1 changed files with 63 additions and 34 deletions
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97
rigo/rigo_app.py
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@@ -354,8 +354,16 @@ class Rigo(Gtk.Application):
Gdk.Screen.get_default(),
DATA_DIR)
self._state_mutex = Lock()
self._current_state = Rigo.STATIC_VIEW_STATE
self._state_transactions = {
Rigo.BROWSER_VIEW_STATE: (
self._enter_browser_state,
self._exit_browser_state),
Rigo.STATIC_VIEW_STATE: (
self._enter_static_state,
self._exit_static_state),
}
self._state_mutex = Lock()
self._avc = ApplicationViewController(
self._entropy, icons, self._entropy_ws,
self._search_entry, self._view)
@@ -372,53 +380,74 @@ class Rigo(Gtk.Application):
def _on_view_filled(self, *args):
self.change_view_state(Rigo.BROWSER_VIEW_STATE)
BROWSER_VIEW_STATE = 1
STATIC_VIEW_STATE = 2
# Possible Rigo Application UI States
BROWSER_VIEW_STATE, STATIC_VIEW_STATE = range(2)
def change_view_state(self, state, child_widget=None):
def _exit_browser_state(self):
"""
Action triggered when UI exits the Application Browser
state (or mode).
"""
self._app_view.hide()
def _enter_browser_state(self):
"""
Action triggered when UI exits the Application Browser
state (or mode).
"""
self._app_view.show()
self._current_state = Rigo.BROWSER_VIEW_STATE
def _exit_static_state(self):
"""
Action triggered when UI exits the Static Browser
state (or mode). AKA the Welcome Box.
"""
self._static_view.hide()
# release all the childrens of static_view
for child in self._static_view.get_children():
self._static_view.remove(child)
def _enter_static_state(self):
"""
Action triggered when UI exits the Static Browser
state (or mode). AKA the Welcome Box.
"""
# keep the current widget if any, or add the
# welcome widget
if not self._static_view.get_children():
self._welcome_box.show()
self._static_view.pack_start(self._welcome_box,
False, False, 0)
self._static_view.show()
self._current_state = Rigo.STATIC_VIEW_STATE
def change_view_state(self, state):
"""
Change Rigo Application UI state.
You can pass a custom widget that will be shown in case
of static view state.
"""
with self._state_mutex:
if state == Rigo.BROWSER_VIEW_STATE:
self._static_view.hide()
# release all the childrens of static_view
for child in self._static_view.get_children():
self._static_view.remove(child)
self._app_view.show()
elif state == Rigo.STATIC_VIEW_STATE:
self._app_view.hide()
if child_widget is not None:
for child in self._static_view.get_children():
self._static_view.remove(child)
self._static_view.pack_start(child_widget,
False, False, 0)
child_widget.show()
else:
# keep the current widget if any, or add the
# welcome widget
if not self._static_view.get_children():
self._welcome_box.show()
self._static_view.pack_start(self._welcome_box,
False, False, 0)
self._static_view.show()
else:
txc = self._state_transactions.get(
state)
if txc is None:
raise AttributeError("wrong view state")
enter_st, exit_st = txc
self._current_state = state
current_enter_st, current_exit_st = self._state_transactions.get(
self._current_state)
# exit from current state
current_exit_st()
# enter the new state
enter_st()
def change_view_state_safe(self, state, child_widget=None):
def change_view_state_safe(self, state):
"""
Thread-safe version of change_view_state().
"""
def _do_change():
return self.change_view_state(state, child_widget=child_widget)
return self.change_view_state(state)
GLib.idle_add(_do_change)
def _on_style_updated(self, widget, init_css_callback, *args):