我有一个带有一些线段(LineCollection)和一些点的图形。这些线和点具有与之关联的一些未绘制的值。我希望能够添加鼠标悬停的工具提示或其他方法来轻松找到点和线的关联值。点或线段是否可能?
最佳答案
对于积分,我找到了一种方法,但是您必须使用WX后端
"""Example of how to use wx tooltips on a matplotlib figure window.
Adapted from http://osdir.com/ml/python.matplotlib.devel/2006-09/msg00048.html"""
import matplotlib as mpl
mpl.use('WXAgg')
mpl.interactive(False)
import pylab as pl
from pylab import get_current_fig_manager as gcfm
import wx
import numpy as np
import random
class wxToolTipExample(object):
def __init__(self):
self.figure = pl.figure()
self.axis = self.figure.add_subplot(111)
# create a long tooltip with newline to get around wx bug (in v2.6.3.3)
# where newlines aren't recognized on subsequent self.tooltip.SetTip() calls
self.tooltip = wx.ToolTip(tip='tip with a long %s line and a newline\n' % (' '*100))
gcfm().canvas.SetToolTip(self.tooltip)
self.tooltip.Enable(False)
self.tooltip.SetDelay(0)
self.figure.canvas.mpl_connect('motion_notify_event', self._onMotion)
self.dataX = np.arange(0, 100)
self.dataY = [random.random()*100.0 for x in xrange(len(self.dataX))]
self.axis.plot(self.dataX, self.dataY, linestyle='-', marker='o', markersize=10, label='myplot')
def _onMotion(self, event):
collisionFound = False
if event.xdata != None and event.ydata != None: # mouse is inside the axes
for i in xrange(len(self.dataX)):
radius = 1
if abs(event.xdata - self.dataX[i]) < radius and abs(event.ydata - self.dataY[i]) < radius:
top = tip='x=%f\ny=%f' % (event.xdata, event.ydata)
self.tooltip.SetTip(tip)
self.tooltip.Enable(True)
collisionFound = True
break
if not collisionFound:
self.tooltip.Enable(False)
example = wxToolTipExample()
pl.show()