我已经用 ttk 完成了（工作）应用程序。它使用自行创建的模块来显示与 comport 相关的控件和在其上绘制一些图形的画布。当我创建我的对象的一个实例时，它会启动一个线程，在该线程中处理串行输入并将其附加到一个列表（每个图表一个列表）。当我有 3-6 个图表时，应用程序变得明显变慢。它也有一些错误，但当我完成一般概念时，我会解决它们。
可以帮助您帮助我的事情：
- comport 是一个自写对象的实例，它派生自 LabelFrame 和 Serial.Serial
- 图表的坐标存储在列表字典中： self.graphs = {} self.graphs['name1']=[] 存储的坐标数量最多为画布的宽度，因此每个图表大约 1000-2000 个。有六张图 - 请乘以 6
- 随着每个新坐标的到达，我从列表中弹出（0）并附加（）新坐标
- 我忘了，我还将每组新坐标的时间存储在一个单独的列表中
- 我使用 preiodic 调用函数来处理列表： self.after(100, func=self.periodicCall) 因此，每 100 毫秒我从画布中删除（全部），并用线条集绘制每个图形。所以如果我在 6 个 graps 中有 1000 个坐标，我会画 6000 条小线
- 当然还有一些服务信息，比如一些尺子
所以我想这个想法很清楚。我想弄清楚什么是更好的方法。我只是 python 和编程的初学者，所以我要为我将要发布的代码以及它会引起的眼痛寻求你的借口。我没有任何编程风格，我想修复它。至少一点。因此，欢迎对您将在代码中看到的任何内容发表任何其他评论。
#-------------------------------------------------------------------------------
# Name: dataVisualizer
# Purpose:
#
# Author: dccharacter
#
# Created: 23.03.2012
# Copyright: (c) dccharacter 2012
# Licence: <your licence>
#-------------------------------------------------------------------------------
#!/usr/bin/env python
from tkinter import *
from tkinter.ttk import *
from robowidgets.serialPortGui import *
import threading
import re
import atexit
import random
from datetime import datetime
import time
class dataVisualizer(LabelFrame):
def __init__(self, master, comport , cnf={}, **kw):
self.master = master
self.comport = comport
LabelFrame.__init__(self, *cnf, **kw)
self.messageVar = StringVar()
Label(self, text="Message format regexp:").pack()
self.messagePattern = Entry(self, width = 20, text = 234234, textvariable = self.messageVar);
self.messageVar.set(r'(-*\d+),(-*\d+),(-*\d+),(-*\d+),(-*\d+),(-*\d+)')
self.messagePattern.pack()
Button(self, text = "Pause", command = self.pause).pack()
self.pauseFlag = TRUE
self.canvWidth, self.canvHeight = 1000, 700
self.density = 1 ##width of pixel - the bigger, the wider graph
self.numOfDots = self.canvWidth//self.density
self.graphs = {}
self.graphs['name1']=[]
self.graphs['name2']=[]
self.graphs['name3']=[]
self.graphs['name4']=[]
self.graphs['name5']=[]
self.graphs['name6']=[]
self.timings = []
self.zeroTiming = datetime.now()
self.colors = ['red', 'blue', 'green', 'orange', 'violet', 'black', 'cyan']
self.canv = Canvas(self, width = self.canvWidth, height = self.canvHeight)
self.canv.pack()
self.thread = threading.Thread(target = self.workerThread)
self.thread.start()
self.serialData = []
self.periodicCall()
def pause(self):
self.pauseFlag = ~self.pauseFlag
def redraw(self):
self.canv.delete(ALL)
colorIndex = 0
for graphName in self.graphs:
runningAverage = sum(self.graphs[graphName][-10:])//10
text = str(runningAverage)
self.canv.create_text(self.canvWidth-60, 20*(colorIndex+1), text = text,
fill = self.colors[colorIndex], anchor = W)
prev_xxx, prev_yyy = 0, 0
for yyy in self.graphs[graphName]:
self.canv.create_line(prev_xxx, prev_yyy, prev_xxx+self.density, self.canvHeight//2 - yyy,
width = 1.4, fill = self.colors[colorIndex])
prev_xxx, prev_yyy = prev_xxx+self.density, self.canvHeight//2 - yyy
colorIndex = colorIndex + 1
self.drawMesh()
def drawMesh(self):
self.canv.create_rectangle(3, 3, self.canvWidth,
self.canvHeight, outline = 'black', width = 2)
self.canv.create_line(0, self.canvHeight/2, self.canvWidth,
self.canvHeight/2, fill="black", width = 1)
mouseX = self.canv.winfo_pointerx() - self.canv.winfo_rootx()
mouseY = self.canv.winfo_pointery() - self.canv.winfo_rooty()
if mouseY < 60: aaa = -1
else: aaa = 1
if mouseX > self.canvWidth - 200 : bbb = -12
else: bbb = 1
try:
self.canv.create_rectangle(mouseX + 10*bbb - 5, mouseY - 20*aaa +10,
mouseX + 10*bbb + 115, mouseY - 20*aaa - 30, outline = "black",
fill = "red")
self.canv.create_text(mouseX + 10*bbb, mouseY - 40*aaa,
text = "t="+str(self.timings[mouseX//self.density]),
anchor = W)
self.canv.create_text(mouseX + 10*bbb, mouseY - 20*aaa,
text = "value="+str(self.canvHeight//2 - mouseY),
anchor = W)
except IndexError:
pass
self.canv.create_line(mouseX, 0, mouseX,
self.canvHeight, fill="blue", dash = [4, 1, 2, 1], width = 1)
self.canv.create_line(0, mouseY, self.canvWidth,
mouseY, fill="blue", dash = [4, 1, 2, 1], width = 1)
def periodicCall(self):
self.redraw()
self.after(100, func=self.periodicCall)
def workerThread(self):
while (1):
try:
if self.comport.isOpen() and (self.pauseFlag == TRUE):
comLine = self.comport.readline()
if len(self.timings) == self.numOfDots:
self.timings.pop(0)
td = datetime.now() - self.zeroTiming
## b'271;-3:-50\r\n'
parsedLine = re.search(self.messagePattern.get(), str(comLine))
index = 1
if parsedLine:
self.timings.append(td)
for graphName in self.graphs:
if len(self.graphs[graphName]) == self.numOfDots:
self.graphs[graphName].pop(0)
try:
self.graphs[graphName].append(int(parsedLine.group(index)))
except IndexError:
self.graphs[graphName].append(0)
index = index + 1
else:
self.comport.flush();
time.sleep(1)
except TclError:
self.thread._stop()
def main():
root = Tk()
mainWindow = Frame(root)
mainWindow.pack()
port = comPortWidget(mainWindow)
port.pack()
dv = dataVisualizer(mainWindow, port)
dv.pack()
root.mainloop()
if __name__ == '__main__':
main()
并且串行部分 - 也可能滞后（当我曾经每隔一秒左右重新枚举端口时就会滞后......）
#-------------------------------------------------------------------------------
# Name: robowidgets
# Purpose:
#
# Author: dccharacter
#
# Created: 10.03.2012
# Copyright: (c) dccharacter 2012
# Licence: <your licence>
#-------------------------------------------------------------------------------
#!/usr/bin/env python
import serial
from serial.tools.list_ports_windows import comports
from tkinter import *
from tkinter.ttk import *
class comPortWidget(LabelFrame, serial.Serial):
commonComPortSpeeds = ["1200", "2400", "4800", "9600", "14400", "19200", "38400", "57600", "115200"]
def __init__(self, master=None, cnf={}, **kw):
"""Construct a comPortWidget widget with the parent MASTER.
STANDARD OPTIONS
borderwidth, cursor, font, foreground,
highlightbackground, highlightcolor,
highlightthickness, padx, pady, relief,
takefocus, text, background, class, colormap, container,
height, labelanchor, labelwidget,
visual, width
WIDGET-SPECIFIC OPTIONS
"""
self.master = master
LabelFrame.__init__(self, master, text="Serial settings", *cnf, **kw)
serial.Serial.__init__(self)
self.parent = master
self.draw()
def draw(self):
self.strVarComPort = StringVar()
self.comboComport = Combobox(self,
textvariable=self.strVarComPort)
self.comboComport.grid(row=0, column=1)
self.labelComportName = Label(self, text="Com port:")
self.labelComportName.grid(row=0, column=0)
self.strVarComSpeed = StringVar()
self.comboComSpeed = Combobox(self,
textvariable=self.strVarComSpeed, values=self.commonComPortSpeeds)
self.comboComSpeed.current(len(self.commonComPortSpeeds)-1)
self.comboComSpeed.grid(row=1, column=1)
self.labelComSpeed = Label(self, text="Com speed:")
self.labelComSpeed.grid(row=1, column=0)
self.buttonComOpen = Button(self, text="Open port", command=self.openPort)
self.buttonComOpen.grid(row=0, column=2)
self.buttonComClose = Button(self, text="Close port", command=self.closePort)
self.buttonComClose.grid(row=1, column=2)
self.buttonRefreshPorts = Button(self, text="Re", width=3, command=self.refreshComPortsCombo)
##self.buttonRefreshPorts.grid(row=0, column=2)
self.refreshComPortsCombo()
def refreshComPortsCombo(self):
listComs = self.enumerateComPorts()
if not listComs:
listComs.append("No com ports found")
self.disableControls(~self.isOpen())
self.buttonComClose.configure(state=DISABLED)
else:
self.disableControls(self.isOpen())
self.buttonRefreshPorts.configure(state=NORMAL)
self.comboComport.config(values=listComs)
self.comboComport.current(len(listComs)-1)
##self.after(500, func=self.refreshComPortsCombo)
def enumerateComPorts(self):
"""
Returns the list ofcom port names in the system or an empty list if
no ports found
"""
listComs = []
for port, desc, hwid in sorted(comports()):
listComs.append(port)
return listComs
def openPort(self):
if self.isOpen():
return
self.port = self.comboComport.get()
self.baudrate = int(self.comboComSpeed.get())
self.timeout = 1
try:
self.open()
self.disableControls(self.isOpen())
except IOError:
pass
def closePort(self):
if self.isOpen():
self.flush()
self.close()
self.disableControls(self.isOpen())
def disableControls(self, isConnected):
if isConnected:
self.labelComportName.configure(state=DISABLED)
self.labelComSpeed.configure(state=DISABLED)
self.comboComport.configure(state=DISABLED)
self.comboComSpeed.configure(state=DISABLED)
self.buttonComClose.configure(state=NORMAL)
self.buttonComOpen.configure(state=DISABLED)
self.buttonRefreshPorts.configure(state=DISABLED)
else:
self.labelComportName.configure(state=NORMAL)
self.labelComSpeed.configure(state=NORMAL)
self.comboComport.configure(state=NORMAL)
self.comboComSpeed.configure(state=NORMAL)
self.buttonComClose.configure(state=DISABLED)
self.buttonComOpen.configure(state=NORMAL)
self.buttonRefreshPorts.configure(state=NORMAL)
def main():
pass
if __name__ == '__main__':
main()
更新：我按照布赖恩的建议做了。现在我有两个屏幕重绘功能。它们之间的区别在于首先将所有行向左移动，在右侧添加新行并删除那些从画布上掉下来的行。第二个将线条向左移动并将从画布上掉下来的元素重新部署到右侧（不创建新元素）。就我的初始变体而言，其中任何一个都有很大的改进，但我没有看到两者之间的巨大差异 - 如果我有更多的元素，我可能会想要。后者虽然更适合我的应用程序，因为我不必跟踪那些掉下悬崖的人。
这里的功能：
def drawGraph(self): ###needed for self.updateGraph2() only as it is creates the lines
for graphNum in range(0, self.numOfGraphs):
self.graphLines.append([])
self.graphData.append([0,]*self.numOfDots)
for iii in range(0,self.numOfDots):
self.graphLines[graphNum].append(
self.canv.create_line(0,0,0,0,fill=self.colors[graphNum],
width=1.2, tags=('graphLines', 'graph'+str(graphNum)))
)
def updateGraph2(self):
while not self.queue.empty():
iTuple = self.queue.get()
self.canv.move('graphLines', -self.density,0)
for graphNum in range(0, self.numOfGraphs):
try: self.graphData[graphNum].append(iTuple[graphNum])
except IndexError:
self.graphData[graphNum].append(0)
self.graphData[graphNum].pop(0)
self.graphLines[graphNum].append(self.graphLines[graphNum].pop(0))
self.canv.coords(self.graphLines[graphNum][-1],
self.canv.winfo_width()-self.density,
int(int(self.graphData[graphNum][-2])+int(self.canv.winfo_height()//2)),
self.canv.winfo_width(),
int(int(self.graphData[graphNum][-1])+int(self.canv.winfo_height()//2))
)
def updateGraph(self):
while not self.queue.empty():
self.timingIndex = self.timingIndex + 1
self.canv.move('graphLines', -self.density, 0)
iTuple = self.queue.get()
for iii in range(0, len(iTuple)):
yyy = int(iTuple[iii])+self.canv.winfo_height()//2
if yyy < 0: yyy = 0
if yyy > self.canv.winfo_height(): yyy = self.canv.winfo_height()
prev_yyy = int(self.prevTuple[iii])+self.canv.winfo_height()//2
if prev_yyy < 0: prev_yyy = 0
if prev_yyy > self.canv.winfo_height(): prev_yyy = self.canv.winfo_height()
self.canv.create_line(
self.canv.winfo_width()-self.density, prev_yyy,
self.canv.winfo_width(), yyy,
width = 1.4, fill = self.colors[iii], tags=('graphLines','graph'+str(iii)))
self.prevTuple = iTuple
self.canv.addtag_overlapping('todelete',-1,-1,-3,self.canv.winfo_height()+1)
self.canv.dtag('preserve','todelete')
self.canv.delete('todelete')