Python 使用Matplotlib';s正确选择事件
我认为我没有正确使用Matplotlib的pick事件。在下面的代码中,我创建了三个不相交的橙色磁盘,它们的半径和位置由id号标识 我想单次-单击每个磁盘并向终端打印一条消息,标识磁盘、中心、半径和id。但是,每次单击磁盘时,所有磁盘的拾取事件都会触发。我哪里做错了 这里是情节 这是单击磁盘1时的输出 这是代码Python 使用Matplotlib';s正确选择事件,python,matplotlib,Python,Matplotlib,我认为我没有正确使用Matplotlib的pick事件。在下面的代码中,我创建了三个不相交的橙色磁盘,它们的半径和位置由id号标识 我想单次-单击每个磁盘并向终端打印一条消息,标识磁盘、中心、半径和id。但是,每次单击磁盘时,所有磁盘的拾取事件都会触发。我哪里做错了 这里是情节 这是单击磁盘1时的输出 这是代码 from global_config import GC import matplotlib as mpl import matplotlib.pyplot as plt impo
from global_config import GC
import matplotlib as mpl
import matplotlib.pyplot as plt
import numpy as np
class Disk:
def __init__(self, center, radius, myid = None, figure=None, axes_object=None):
"""
@ARGS
CENTER : Tuple of floats
RADIUS : Float
"""
self.center = center
self.radius = radius
self.fig = figure
self.ax = axes_object
self.myid = myid
def onpick(self,event):
print "You picked the disk ", self.myid, " with Center: ", self.center, " and Radius:", self.radius
def mpl_patch(self, diskcolor= 'orange' ):
""" Return a Matplotlib patch of the object
"""
mypatch = mpl.patches.Circle( self.center, self.radius, facecolor = diskcolor, picker=1 )
if self.fig != None:
self.fig.canvas.mpl_connect('pick_event', self.onpick) # Activate the object's method
return mypatch
def main():
fig = plt.figure()
ax = fig.add_subplot(111)
ax.set_title('click on disks to print out a message')
disk_list = []
disk_list.append( Disk( (0,0), 1.0, 1, fig, ax ) )
ax.add_patch(disk_list[-1].mpl_patch() )
disk_list.append( Disk( (3,3), 0.5, 2, fig, ax ) )
ax.add_patch(disk_list[-1].mpl_patch() )
disk_list.append( Disk( (4,9), 2.5, 3, fig, ax ) )
ax.add_patch(disk_list[-1].mpl_patch() )
ax.set_ylim(-2, 10);
ax.set_xlim(-2, 10);
plt.show()
if __name__ == "__main__":
main()
有很多方法可以解决这个问题。我修改了您的代码,试图显示两种可能的方式(因此它有无关的代码,尽管您希望以何种方式处理它很重要) 一般来说,我认为您只需要附加一个
pick_事件
处理程序,该处理程序将需要确定哪个对象被击中。下面的代码就是这样工作的:on_pick函数捕获您的磁盘和补丁,然后返回一个函数来告诉单击了哪个图形
如果您想继续附加多个pick\u事件
处理程序,您可以通过调整Disk.onpick
来实现这一点,如下所述,以确定pick事件是否与此磁盘相关(每个磁盘将获得每个pick事件)。您会注意到,Disk类将其补丁保存在self.mypatch
中,以使其正常工作。
如果您想这样做,请放弃我对main
所做的所有更改,并取消对Disk.mpl\u patch
中的两行的注释
import matplotlib as mpl
import matplotlib.pyplot as plt
import numpy as np
class Disk:
def __init__(self, center, radius, myid = None, figure=None, axes_object=None):
"""
@ARGS
CENTER : Tuple of floats
RADIUS : Float
"""
self.center = center
self.radius = radius
self.fig = figure
self.ax = axes_object
self.myid = myid
self.mypatch = None
def onpick(self,event):
if event.artist == self.mypatch:
print "You picked the disk ", self.myid, " with Center: ", self.center, " and Radius:", self.radius
def mpl_patch(self, diskcolor= 'orange' ):
""" Return a Matplotlib patch of the object
"""
self.mypatch = mpl.patches.Circle( self.center, self.radius, facecolor = diskcolor, picker=1 )
#if self.fig != None:
#self.fig.canvas.mpl_connect('pick_event', self.onpick) # Activate the object's method
return self.mypatch
def on_pick(disks, patches):
def pick_event(event):
for i, artist in enumerate(patches):
if event.artist == artist:
disk = disks[i]
print "You picked the disk ", disk.myid, " with Center: ", disk.center, " and Radius:", disk.radius
return pick_event
def main():
fig = plt.figure()
ax = fig.add_subplot(111)
ax.set_title('click on disks to print out a message')
disk_list = []
patches = []
disk_list.append( Disk( (0,0), 1.0, 1, fig, ax ) )
patches.append(disk_list[-1].mpl_patch())
ax.add_patch(patches[-1])
disk_list.append( Disk( (3,3), 0.5, 2, fig, ax ) )
patches.append(disk_list[-1].mpl_patch())
ax.add_patch(patches[-1])
disk_list.append( Disk( (4,9), 2.5, 3, fig, ax ) )
patches.append(disk_list[-1].mpl_patch())
ax.add_patch(patches[-1])
pick_handler = on_pick(disk_list, patches)
fig.canvas.mpl_connect('pick_event', pick_handler) # Activate the object's method
ax.set_ylim(-2, 10);
ax.set_xlim(-2, 10);
plt.show()
if __name__ == "__main__":
main()
非常感谢你!那很有效!在这个过程中,我学到了更多关于Python和Matplotlib的知识。非常感谢。