Michael Droettboom wrote:
so are you working on an example? Or should I?
I'm happy to do it, but may not get to it for a few days. My own test
was to run "simple_plot_fps.py" with "handle_clip_rectangle" (in
backend_wx.py) turned on and off. But obviously the wxPython folks will
want a more standalone example.
I've made a standalone example (enclosed). It simply makes a call to
GraphicsContext.DrawLines()
with and without clipping. In this case, it's actually a bit faster
clipped (on OS-X). Maybe it's different with Paths -- I haven't dug into
the MPL code to see how it's being used there.
Also, the whole thing almost hangs (134 seconds to draw) if I up the
number of points to 5000!
Could you alter this to use the drawing calls MPL is actually using,
then we can send it on the wxPython list.
-Chris
--
Christopher Barker, Ph.D.
Oceanographer
Emergency Response Division
NOAA/NOS/OR&R (206) 526-6959 voice
7600 Sand Point Way NE (206) 526-6329 fax
Seattle, WA 98115 (206) 526-6317 main reception
[EMAIL PROTECTED]
#!/usr/bin/env python
"""
A simple file for testing GraphicsContext speed -- at least for clipping a polyline
"""
import wx
import time
import numpy as np
class TestPanel(wx.Panel):
def __init__(self, *args, **kwargs):
wx.Panel.__init__(self, *args, **kwargs)
self.Bind(wx.EVT_PAINT, self.OnPaint)
N = 1000
self.Data = np.zeros((N,2))
self.Data[:,0] = np.linspace(0, 1.0, N)
self.Data[:,1] = np.random.uniform(0, 1.0, (N,))
self._buffer = None
self.Clip = False
self.Bind(wx.EVT_SIZE, self.OnSize)
self.Bind(wx.EVT_PAINT, self.OnPaint)
def OnSize(self, evt):
x,y = self.GetSize()
self._buffer = wx.EmptyBitmap(x,y)
self.Draw()
def OnPaint(self, evt):
dc = wx.PaintDC(self)
dc.DrawBitmap(self._buffer, 0, 0)
def Draw(self, evt=None):
dc = wx.MemoryDC()
dc.SelectObject(self._buffer)
X, Y = self._buffer.GetSize()
box = (0.1*X, 0.1*Y, 0.8*X, 0.8*Y)
# scale the data to fit the Window
data = self.Data * (X,Y)
ctx = wx.GraphicsContext_Create(dc)
# Note: is the only way to clear the bitmap??
ctx.SetBrush(wx.WHITE_BRUSH)
ctx.DrawRectangle(0, 0, X, Y)
ctx.SetBrush(wx.TRANSPARENT_BRUSH)
ctx.SetPen(wx.BLACK_PEN)
ctx.DrawRectangle(*box)
if self.Clip:# clip the drawing:
print "Clipping the Drawing: ",
ctx.Clip(*box)
else:
print "Not clipping the Drawing: ",
ctx.SetPen(wx.Pen("red", 2))
start = time.clock()
ctx.DrawLines(data)
end = time.clock()
self.DrawTime = end-start
print "Drawing Took: %s seconds"%self.DrawTime
self.Refresh()
class TestFrame(wx.Frame):
def __init__(self, *args, **kwargs):
wx.Frame.__init__(self, *args, **kwargs)
self.Panel = TestPanel(self)
self.button = wx.Button(self, label="Clip")
self.button.Bind(wx.EVT_BUTTON, self.OnClick)
S = wx.BoxSizer(wx.VERTICAL)
S.Add(self.Panel, 1, wx.EXPAND)
S.Add(self.button, 0, wx.ALIGN_CENTER_HORIZONTAL|wx.ALL, 5)
self.SetSizer(S)
def OnClick(self, event):
label = self.button.GetLabel()
if label == "Clip":
self.button.Label = "Don't Clip"
self.Panel.Clip = True
elif label == "Don't Clip":
self.button.Label = "Clip"
self.Panel.Clip = False
self.Panel.Draw()
self.Layout()
if __name__ == '__main__':
app = wx.App(False)
f = TestFrame(None)
f.Show()
app.MainLoop()
-------------------------------------------------------------------------
Check out the new SourceForge.net Marketplace.
It's the best place to buy or sell services for
just about anything Open Source.
http://sourceforge.net/services/buy/index.php
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
