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[英]Embedding Matplotlib live plot data from Arduino in tkinter canvas
[英]Embedding matplotlib canvas into tkinter GUI - plot is not showing up, but no error is thrown
运行以下python python脚本不会显示嵌入式matplotlib图。 但是,它也不会引发任何错误消息。 运行脚本后,应该显示一个GUI,该GUI在左侧显示4个按钮,在右侧显示一个实时图形。 该图从文本文件'sample_graph_data.txt'
接收其输入,该文件与脚本位于同一目录中。 脚本中有什么问题以及如何使它起作用?
#Script begins here
from tkinter import *
from tkinter import messagebox
import matplotlib
matplotlib.use("TkAgg")
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
from matplotlib import animation
from matplotlib import style
from matplotlib.figure import Figure
PROGRAM_NAME = 'Smart Farm Controller'
style.use('ggplot')
fig = Figure(figsize=(5, 30), dpi=100)
a = fig.add_subplot(111)
class Controller:
def __init__(self, root):
self.root = root
self.root.title(PROGRAM_NAME)
self.root.protocol('WM_DELETE_WINDOW', self.exit_app)
self.init_gui()
def create_right_graphs(self):
right_frame = Frame(self.root)
right_frame.grid(row=2, column=6, sticky=N+E+W+S,
padx=2, pady=2)
anim = animation.FuncAnimation(fig, self.animate_graph(right_frame),
interval=1000)
def create_left_switches(self):
left_frame = Frame(self.root)
left_frame.grid(row=2, column=1, columnspan=6, sticky=N+E+W+S,
padx=2, pady=2)
led_button = Button(left_frame, text='LED') #command=self.on_led_button_clicked)
led_button.config(height=2, width=30)
led_button.grid(row=2, column=0, padx=4, pady=8)
apump_button = Button(left_frame, text='Air Pump') #command=self.on_apump_button_clicked)
apump_button.config(height=2, width=30)
apump_button.grid(row=3, column=0, padx=4, pady=8)
wpump_res_button = Button(left_frame, text='Reservoir Water Pump')
#command=self.on_wpump_res_button_clicked)
wpump_res_button.config(height=2, width=30)
wpump_res_button.grid(row=4, column=0, padx=4, pady=8)
wpump_grow_button = Button(left_frame, text='Grow Bucket Water Pump')
#command=self.on_wpump_grow_button_clicked)
wpump_grow_button.config(height=2, width=30)
wpump_grow_button.grid(row=5, column=0, padx=4, pady=8)
def animate_graph(self, right_frame):
pullData = open("sample_graph_data.txt","r").read()
dataList = pullData.split('\n')
xList = []
yList = []
for eachLine in dataList:
if len(eachLine)>1:
x, y = eachLine.split(',')
xList.append(int(x))
yList.append(int(x))
a.clear()
a.plot(xList, yList)
canvas = FigureCanvasTkAgg(fig, right_frame)
canvas.show()
canvas.get_tk_widget().pack(side=RIGHT, fill=BOTH, expand=True)
def init_gui(self):
self.create_right_graphs()
self.create_left_switches()
def exit_app(self):
if messagebox.askokcancel("Quit", "Really quit?"):
self.root.destroy()
if __name__ == '__main__':
root = Tk()
Controller(root)
root.mainloop()
在运行时,问题的代码中确实没有触发任何错误,但是它也没有按预期运行。 根本不会触发某些错误,因为从未调用过代码的各个部分。
有几个问题:
FigureCanvas
添加到动画外部的Frame
。 self
将其设为类属性来完成此操作。 pack
完成。 FuncAnimation(fig, self.animate_graph, frames=12)
代替
FuncAnimation(fig, self.animate_graph(someargument))
frames
参数给定的列表中的列表条目)。 如果需要,您可以提供其他参数(在这种情况下,请参考文档)。 我确定我也忘记提及其他一些事情。 但是,这是一个正在运行的代码。
from tkinter import *
import matplotlib
matplotlib.use("TkAgg")
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
from matplotlib import animation
from matplotlib import style
from matplotlib.figure import Figure
style.use('ggplot')
fig = Figure(figsize=(5, 4), dpi=100)
a = fig.add_subplot(111)
class Controller:
def __init__(self, root):
self.root = root
self.create_left_switches()
self.create_right_graphs()
def create_right_graphs(self):
right_frame = Frame(self.root)
right_frame.grid(row=2, column=6, sticky=N+E+W+S,
padx=2, pady=2)
right_frame.pack(fill=X, padx=5, pady=5)
self.canvas = FigureCanvasTkAgg(fig,right_frame )
self.canvas.get_tk_widget().pack(side=RIGHT, fill=BOTH, expand=True)
self.anim = animation.FuncAnimation(fig, self.animate_graph, frames=12,
interval=500, repeat=True)
self.canvas.show()
def create_left_switches(self):
left_frame = Frame(self.root)
left_frame.grid(row=2, column=1, columnspan=6, sticky=N+E+W+S,
padx=2, pady=2)
left_frame.pack(fill=X, padx=5, pady=5)
led_button = Button(left_frame, text='LED') #command=self.on_led_button_clicked)
led_button.config(height=2, width=30)
led_button.grid(row=2, column=0, padx=4, pady=8)
def animate_graph(self, i):
pullData = open("sample_graph_data.txt","r").read()
dataList = pullData.split('\n')
xList = []
yList = []
for eachLine in dataList:
if len(eachLine)>1:
x, y = eachLine.split(',')
xList.append(int(x))
yList.append(int(y)**(1+i/12.))
a.clear()
a.plot(xList, yList)
if __name__ == '__main__':
root = Tk()
Controller(root)
root.mainloop()
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