python - 附加使用交互模式和用户输入的python类?
问题描述
我有一个类允许用户使用鼠标创建一个区域。现在我想通过将对象附加到列表来创建多个区域。
但是,当我尝试附加它时,它只运行一次,我得到了同一区域的 2 个副本。似乎两者同时并行运行。这个问题有简单的解决方法吗?
import numpy as np
import sys
import matplotlib.pyplot as plt
import matplotlib.path as mplPath
import matplotlib.image as mpimg
class create_region():
def __init__(self, img):
if isinstance(img, np.ndarray):
plt.imshow(img)
fig = plt.gcf()
fig.set_size_inches(12,9)
else:
print('Error: please include an image np.ndarray, create_region(img)')
return
self.img = img
self.img_size = np.shape(img)
self.line = None
self.roicolor = (.415,1,.302) # Use neon green to stand out
self.markersize = 4
self.x_pts = []
self.y_pts = []
self.previous_pt = []
self.start_point = []
self.end_point = []
self.fig = fig
self.ax = plt.gca()
self.__ID1 = self.fig.canvas.mpl_connect(
'motion_notify_event', self.__motion_notify_callback)
self.__ID2 = self.fig.canvas.mpl_connect(
'button_press_event', self.__button_press_callback)
if sys.flags.interactive:
plt.show(block=False)
else:
plt.show()
def __motion_notify_callback(self, event):
if event.inaxes:
#ax = event.inaxes
x, y = event.xdata, event.ydata
# Move line around
if (event.button == None or event.button == 1) and self.line != None:
self.line.set_data([self.previous_pt[0], x],
[self.previous_pt[1], y])
self.fig.canvas.draw()
def __button_press_callback(self, event):
if event.inaxes:
x, y = event.xdata, event.ydata
ax = event.inaxes
# If you press the left button, single click
if event.button == 1 and event.dblclick == False:
if self.line == None: # if there is no line, create a line
self.line = plt.Line2D([x, x],
[y, y],
marker='o',
color=self.roicolor,
markersize = self.markersize)
self.start_point = [x,y]
self.previous_pt = self.start_point
self.x_pts=[x]
self.y_pts=[y]
ax.add_line(self.line)
self.fig.canvas.draw()
# add a segment
else: # if there is a line, create a segment
self.line = plt.Line2D([self.previous_pt[0], x],
[self.previous_pt[1], y],
marker = 'o',color=self.roicolor,
markersize = self.markersize)
self.previous_pt = [x,y]
self.x_pts.append(x)
self.y_pts.append(y)
event.inaxes.add_line(self.line)
self.fig.canvas.draw()
# close the loop and disconnect
elif ((event.button == 1 and event.dblclick==True) or
(event.button == 3 and event.dblclick==False)) and self.line != None:
self.fig.canvas.mpl_disconnect(self.__ID1) #joerg
self.fig.canvas.mpl_disconnect(self.__ID2) #joerg
self.line.set_data([self.previous_pt[0],
self.start_point[0]],
[self.previous_pt[1],
self.start_point[1]])
ax.add_line(self.line)
self.fig.canvas.draw()
self.line = None
if sys.flags.interactive:
pass
else:
#figure has to be closed so that code can continue
plt.close(self.fig)
# create zeros image
img=np.zeros((768,1024),dtype='uint8')
# try to append 2 different user regions to list
# seems both run simultaneously, returns 2 copies of 1 region
M = []
for i in range(2):
M.append(create_region(img))
解决方案
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