>>> Benjamin Root 12/07/11 4:16 AM >>>
>
> Use draw_idle() if performance is an issue. Also, you don't have to
redraw
> everything. You can save the object returned by avline()
> and in subsequent draws, just modify the data. Usually, there is a
set_data()
> or a set_xy() method you can use for this.
I didn't find those methods for the axvline. I thought it would have
them like
other Line2D objects.
This now works, though it sometimes creates ghost double lines, and
isn't the
most performant solution:
def update_marker(self, event):
print "plotMarker() pos = ", event.xdata # DEBUG
self.marker=self.ax1
#print 'button=%d, x=%d, y=%d, xdata=%f, ydata=%f'%(
# event.button, event.x, event.y, event.xdata, event.ydata)
# DEBUG
# Create markers (vertical lines) in both plots
self.marker=self.ax1.axvline(x=event.xdata, linewidth=1.5,
color='r')
self.marker=self.ax2.axvline(x=event.xdata, linewidth=1.5,
color='r')
# We need to remove all unnecessary marker in plot 1 and plot 2
# TODO: find better method, keeps double marker sometimes
for i in range(1, len(self.ax1.lines)-1):
self.ax1.lines[i].remove()
for i in range(1, len(self.ax2.lines)-1):
self.ax2.lines[i].remove()
self.marker=self.ax1.axvline(x=event.xdata, linewidth=1.5,
color='r')
self.marker=self.ax1.axvline(x=event.xdata, linewidth=1.5,
color='r')
self.canvas.draw_idle()
Thanks for the help.
Cheers,
Sven
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