matplotlib中的点和线工具提示? [英] Point and line tooltips in matplotlib?

问题描述

我有一个带有某些线段的图形( LineCollection )和一些要点.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?

I have a graph with some line segments (LineCollection) and some points. These lines and points have some values associated with them that are not graphed. I would like to be able to add a mouse-over tool-tip or other method of easily finding the associated value for the points and line. Is this possible for either points or lines segments?

推荐答案

对于积分，我找到了一种方法，但是您必须使用WX后端

For points, I have found a way, but you have to use the WX backend

"""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()

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