Revision: 8254
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=8254&view=rev
Author: ryanmay
Date: 2010-04-20 19:43:01 +0000 (Tue, 20 Apr 2010)
Log Message:
-----------
Add TimerTk and new_timer() method.
Modified Paths:
--------------
trunk/matplotlib/lib/matplotlib/backends/backend_tkagg.py
Modified: trunk/matplotlib/lib/matplotlib/backends/backend_tkagg.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/backends/backend_tkagg.py 2010-04-20
19:42:29 UTC (rev 8253)
+++ trunk/matplotlib/lib/matplotlib/backends/backend_tkagg.py 2010-04-20
19:43:01 UTC (rev 8254)
@@ -13,7 +13,7 @@
import matplotlib
from matplotlib.cbook import is_string_like
from matplotlib.backend_bases import RendererBase, GraphicsContextBase, \
- FigureManagerBase, FigureCanvasBase, NavigationToolbar2, cursors
+ FigureManagerBase, FigureCanvasBase, NavigationToolbar2, cursors,
TimerBase
from matplotlib.figure import Figure
from matplotlib._pylab_helpers import Gcf
@@ -95,6 +95,42 @@
return figManager
+class TimerTk(TimerBase):
+ '''
+ Subclass of :class:`backend_bases.TimerBase` that uses Tk's timer events.
+
+ Attributes:
+ * interval: The time between timer events in milliseconds. Default
+ is 1000 ms.
+ * single_shot: Boolean flag indicating whether this timer should
+ operate as single shot (run once and then stop). Defaults to False.
+ * callbacks: Stores list of (func, args) tuples that will be called
+ upon timer events. This list can be manipulated directly, or the
+ functions add_callback and remove_callback can be used.
+ '''
+ def __init__(self, parent):
+ TimerBase.__init__(self)
+ self.parent = parent
+
+ def _timer_start(self):
+ self._timer = self.parent.after(self._interval, self._on_timer)
+
+ def _timer_stop(self):
+ if self._timer is not None:
+ self.parent.after_cancel(self._timer)
+ self._timer = None
+
+ def _on_timer(self):
+ TimerBase._on_timer(self)
+
+ # Tk after() is only a single shot, so we need to add code here to
+ # reset the timer if we're not operating in single shot mode.
+ if not self._single and len(self.callbacks) > 0:
+ self._timer = self.parent.after(self._interval, _self._on_timer)
+ else:
+ self._timer = None
+
+
class FigureCanvasTkAgg(FigureCanvasAgg):
keyvald = {65507 : 'control',
65505 : 'shift',
@@ -322,6 +358,14 @@
key = self._get_key(event)
FigureCanvasBase.key_release_event(self, key, guiEvent=event)
+ def new_timer(self):
+ """
+ Creates a new backend-specific subclass of
+ :class:`backend_bases.TimerBase`. This is useful for getting periodic
+ events through the backend's native event loop.
+ """
+ return TimerTk()
+
def flush_events(self):
self._master.update()
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