I am making a new wxcursor_demo.py example I attach it to this mail.
If anybody can help me iron those wrinkles I think we can make a great
wxcursor_demo example.
I am not proud of invoking the SetCursor method on the wx.EVT_PAINT
event but it works ...
The present wxcursor_demo example is broken because:
- Does not follow wx coding standards, not pythonic at all.
- Very complicated example to follow and long.
- Some nonsensical code such as the Time and Price part.
- The wx "hand draw", crosshair has lots of disadvantages (you get
the mouse pointer right next to it so it's useless for picking pixels in
images.)
- The users should have access to wx.StockCursor, with the current
example every cursor has to be " hand drawn"
This said, I thank a lot the person who started the example
since I used it as a starting point.
Any feedback would be appreciated.
Daniel.
#!/usr/bin/env python
"""
Example to draw a cursor and report the data coords in wx
"""
import matplotlib
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
from matplotlib.backends.backend_wx import NavigationToolbar2Wx
from matplotlib.figure import Figure
from matplotlib.numerix import arange, sin, pi
import wx
class CanvasFrame(wx.Frame):
def __init__(self, ):
wx.Frame.__init__(self,None,-1,
'CanvasFrame',size=(550,350))
self.SetBackgroundColour(wx.NamedColor("WHITE"))
self.figure = Figure()
self.axes = self.figure.add_subplot(111)
t = arange(0.0,3.0,0.01)
s = sin(2*pi*t)
self.axes.plot(t,s)
self.axes.set_xlabel('t')
self.axes.set_ylabel('sin(t)')
self.figure_canvas = FigureCanvas(self, -1, self.figure)
# Note that event is a MplEvent
self.figure_canvas.mpl_connect('motion_notify_event',
self.UpdateStatusBar)
self.figure_canvas.mpl_connect('motion_notify_event', self.UpdateCursor)
self.sizer = wx.BoxSizer(wx.VERTICAL)
self.sizer.Add(self.figure_canvas, 1, wx.LEFT | wx.TOP | wx.GROW)
self.SetSizer(self.sizer)
self.Fit()
self.statusBar = wx.StatusBar(self, -1)
self.statusBar.SetFieldsCount(1)
self.SetStatusBar(self.statusBar)
self.toolbar = NavigationToolbar2Wx(self.figure_canvas)
self.sizer.Add(self.toolbar, 0, wx.LEFT | wx.EXPAND)
self.toolbar.Show()
def UpdateCursor(self, event):
self.figure_canvas.SetCursor(wx.StockCursor(wx.CURSOR_BULLSEYE))
def UpdateStatusBar(self, event):
if event.inaxes:
x, y = event.xdata, event.ydata
self.statusBar.SetStatusText(( "x= " + str(x) +
" y=" +str(y) ),
0)
class App(wx.App):
def OnInit(self):
'Create the main window and insert the custom frame'
frame = CanvasFrame()
self.SetTopWindow(frame)
frame.Show(True)
return True
if __name__=='__main__':
matplotlib.use('WXAgg')
app = App(0)
app.MainLoop()
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