Revision: 5853
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=5853&view=rev
Author: pkienzle
Date: 2008-07-24 22:29:57 +0000 (Thu, 24 Jul 2008)
Log Message:
-----------
support mouse wheel in wx
Modified Paths:
--------------
trunk/matplotlib/examples/pylab_examples/image_slices_viewer.py
trunk/matplotlib/lib/matplotlib/backend_bases.py
trunk/matplotlib/lib/matplotlib/backends/backend_gtk.py
trunk/matplotlib/lib/matplotlib/backends/backend_wx.py
Modified: trunk/matplotlib/examples/pylab_examples/image_slices_viewer.py
===================================================================
--- trunk/matplotlib/examples/pylab_examples/image_slices_viewer.py
2008-07-24 21:56:57 UTC (rev 5852)
+++ trunk/matplotlib/examples/pylab_examples/image_slices_viewer.py
2008-07-24 22:29:57 UTC (rev 5853)
@@ -17,7 +17,7 @@
self.update()
def onscroll(self, event):
- print event.button
+ print event.button, event.step
if event.button=='up':
self.ind = numpy.clip(self.ind+1, 0, self.slices-1)
else:
Modified: trunk/matplotlib/lib/matplotlib/backend_bases.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/backend_bases.py 2008-07-24 21:56:57 UTC
(rev 5852)
+++ trunk/matplotlib/lib/matplotlib/backend_bases.py 2008-07-24 22:29:57 UTC
(rev 5853)
@@ -768,7 +768,10 @@
*key*
the key pressed: None, chr(range(255), 'shift', 'win', or 'control'
+ *step*
+ number of scroll steps (positive for 'up', negative for 'down')
+
Example usage::
def on_press(event):
@@ -783,16 +786,18 @@
inaxes = None # the Axes instance if mouse us over axes
xdata = None # x coord of mouse in data coords
ydata = None # y coord of mouse in data coords
+ step = None # scroll steps for scroll events
def __init__(self, name, canvas, x, y, button=None, key=None,
- guiEvent=None):
+ step=0, guiEvent=None):
"""
x, y in figure coords, 0,0 = bottom, left
- button pressed None, 1, 2, 3
+ button pressed None, 1, 2, 3, 'up', 'down'
"""
LocationEvent.__init__(self, name, canvas, x, y, guiEvent=guiEvent)
self.button = button
self.key = key
+ self.step = step
class PickEvent(Event):
"""
@@ -1050,7 +1055,7 @@
event = PickEvent(s, self, mouseevent, artist, **kwargs)
self.callbacks.process(s, event)
- def scroll_event(self, x, y, button, guiEvent=None):
+ def scroll_event(self, x, y, step, guiEvent=None):
"""
Backend derived classes should call this function on any
scroll wheel event. x,y are the canvas coords: 0,0 is lower,
@@ -1059,9 +1064,13 @@
This method will be call all functions connected to the
'scroll_event' with a :class:`MouseEvent` instance.
"""
- self._button = button
+ if step >= 0:
+ self._button = 'up'
+ else:
+ self._button = 'down'
s = 'scroll_event'
- mouseevent = MouseEvent(s, self, x, y, button, self._key,
guiEvent=guiEvent)
+ mouseevent = MouseEvent(s, self, x, y, self._button, self._key,
+ step=step, guiEvent=guiEvent)
self.callbacks.process(s, mouseevent)
Modified: trunk/matplotlib/lib/matplotlib/backends/backend_gtk.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/backends/backend_gtk.py 2008-07-24
21:56:57 UTC (rev 5852)
+++ trunk/matplotlib/lib/matplotlib/backends/backend_gtk.py 2008-07-24
22:29:57 UTC (rev 5853)
@@ -181,10 +181,10 @@
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
if event.direction==gdk.SCROLL_UP:
- direction = 'up'
+ step = 1
else:
- direction = 'down'
- FigureCanvasBase.scroll_event(self, x, y, direction)
+ step = -1
+ FigureCanvasBase.scroll_event(self, x, y, step)
return False # finish event propagation?
def button_press_event(self, widget, event):
Modified: trunk/matplotlib/lib/matplotlib/backends/backend_wx.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/backends/backend_wx.py 2008-07-24
21:56:57 UTC (rev 5852)
+++ trunk/matplotlib/lib/matplotlib/backends/backend_wx.py 2008-07-24
22:29:57 UTC (rev 5853)
@@ -1160,9 +1160,36 @@
FigureCanvasBase.button_release_event(self, x, y, 1, guiEvent=evt)
def _onMouseWheel(self, evt):
- # TODO: implement mouse wheel handler
- pass
+ """Translate mouse wheel events into matplotlib events"""
+ # Determine mouse location
+ x = evt.GetX()
+ y = self.figure.bbox.height - evt.GetY()
+
+ # Convert delta/rotation/rate into a floating point step size
+ delta = evt.GetWheelDelta()
+ rotation = evt.GetWheelRotation()
+ rate = evt.GetLinesPerAction()
+ #print "delta,rotation,rate",delta,rotation,rate
+ step = rate*float(rotation)/delta
+
+ # Done handling event
+ evt.Skip()
+
+ # Mac is giving two events for every wheel event
+ # Need to skip every second one
+ if wx.Platform == '__WXMAC__':
+ if not hasattr(self,'_skipwheelevent'):
+ self._skipwheelevent = True
+ elif self._skipwheelevent:
+ self._skipwheelevent = False
+ return # Return without processing event
+ else:
+ self._skipwheelevent = True
+
+ # Convert to mpl event
+ FigureCanvasBase.scroll_event(self, x, y, step, guiEvent=evt)
+
def _onMotion(self, evt):
"""Start measuring on an axis."""
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