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POHow to pass self declared variables between different classes in python
 

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  1. POHow to pass self declared variables between different classes in python
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    <p>I am trying to create a program that tracks bike intervals and creates a map of a course to use while biking. I want to be able to havbe a red line track the line while the stopwatch is counting. However, I am not able to pass the canvas between the class for the main App and the Stopwatch. </p> <pre><code>from Tkinter import * import random import time from itertools import product class App(): def __init__(self,master): menubar = Menu(master) filemenu = Menu(menubar,tearoff=0) filemenu.add_command(label="Quit",command=root.destroy) filemenu.add_command(label="Interval",command=self.Interval) coursemenu = Menu(menubar,tearoff=0) coursemenu.add_command(label="New Random Course",command=self.regenerateTerrain) menubar.add_cascade(label="File",menu=filemenu) menubar.add_cascade(label="Course",menu=coursemenu) master.config(menu=menubar) self.statusbar = Frame(master) self.statusbar.pack(side=BOTTOM, fill=X) self.infobar = Frame(master) self.infobar.pack(side=TOP,fill=X) self.course = Label(self.infobar, text="Welcome!") self.course.pack(side=LEFT) self.action = Label(self.infobar, text="") self.action.pack(side=RIGHT,fill=X) #Stopwatch stop = StopWatch(self.infobar) stop.pack(side=LEFT) #Stopwatch buttons self.button = Button(self.infobar, text="Start", command=stop.Start) self.button2 = Button(self.infobar, text="Stop", command=stop.Stop) self.button3 = Button(self.infobar, text="Reset", command=stop.Reset) self.button4 = Button(self.infobar, text="Quit", command=root.quit) self.button.pack(side=LEFT) self.button2.pack(side=LEFT) self.button3.pack(side=LEFT) self.button4.pack(side=LEFT) #Constants for program #distance is in miles #height is in feet self.totalDistance = 25 self.heightInterval = 10 self.canvasHeight = 300 self.canvasWidth = 500 self.c=Canvas(root,width=self.canvasWidth,height=self.canvasHeight,background="white") self.c.pack(side=TOP,fill=BOTH,expand=YES) #Call regenerate an initial time, so that terrain gets generated on #initial creation self.regenerateTerrain() def buildTerrain(self,distance=25,topBound=0, bottomBound=300,width=500): options=['up','down','flat','flat'] y = (bottomBound-topBound)/2 map = [y] changer =0 for i in xrange(distance*10): direction = random.choice(options) options.pop() if direction=='up' and y&gt;10: options.append('up') map.append(map[len(map)-1]-self.heightInterval) changer=-self.heightInterval elif direction=='down' and y&lt;bottomBound-10: options.append('down') map.append(map[len(map)-1]+self.heightInterval) changer=self.heightInterval else: options.append('flat') map.append(map[len(map)-1]) changer=0 y+=changer return map def regenerateTerrain(self,distance=25,topBound=0,bottomBound=300,width=500): self.c.delete(ALL) x = 0 y = (bottomBound+topBound)/2 self.build = self.buildTerrain() for i in xrange(1,len(self.build)-1): self.c.create_line(x,y,x+(self.canvasWidth/(self.totalDistance*10)),self.build[i],fill="black") x+=(self.canvasWidth/(self.totalDistance*10)) y=self.build[i] self.c.create_oval(0,self.build[0]-1,4,self.build[0]-5,fill="red") def Interval(self): self.clock = StopWatch() top = Toplevel() top.title("Interval Mode") entLabelLow = Label(top) entLabelLow["text"] = "# of minutes at low interval: " entLabelHigh = Label(top) entLabelHigh["text"] = "# of minutes at high interval: " entLabelTotal = Label(top) entLabelTotal["text"] = "Total # of minutes" entWidgeTotal = Entry(top) entWidgeTotal["width"] = 5 entWidgeLow = Entry(top) entWidgeLow["width"] = 5 entWidgeHigh = Entry(top) entWidgeHigh["width"] = 5 entLabelTotal.pack(side=LEFT) entWidgeTotal.pack(side=LEFT) entLabelLow.pack(side=LEFT) entWidgeLow.pack(side=LEFT) entLabelHigh.pack(side=LEFT) entWidgeHigh.pack(side=LEFT) self.linesDist = 0 self.minutes = 0.0 self.timeatHL = 0 self.timeatLL = 0 self.currentPos = 0 def drawGraph(): if entWidgeLow.get().strip() == "" or entWidgeHigh.get().strip() == "": print"Enter a value please" pass top.destroy() elif int(entWidgeLow.get().strip()) not in range(1,11) or int(entWidgeHigh.get().strip()) not in range(1,11): print"Please enter a number between 1 and 10" pass top.destroy() else: #Get the values self.LLength = int(entWidgeLow.get().strip()) self.HLength = int(entWidgeHigh.get().strip()) self.TLength = int(entWidgeTotal.get().strip()) top.destroy() while self.linesDist &lt; self.canvasWidth - 50: #Create the vertical lines self.c.create_line(10,195,10,205,fill="red") self.linesDist += 50 self.intervalLength = self.TLength / 10.0 self.minutes += float(self.intervalLength) self.c.create_line((self.linesDist, 0, self.linesDist, 300), fill="gray") self.c.create_text(self.linesDist, 290, text=str(self.minutes)) #Now to draw the graph while self.currentPos &lt; 500: self.c.create_line(self.currentPos, 200, (((500/self.TLength)*self.LLength)+self.currentPos), 200) self.currentPos += (float(self.LLength)/self.TLength) * 500 self.c.create_line(self.currentPos, 200, self.currentPos, 100) self.c.create_line(self.currentPos, 100, (((500/self.TLength)*self.HLength)+self.currentPos), 100) self.currentPos += (float(self.HLength)/self.TLength) * 500 self.c.create_line(self.currentPos, 100, self.currentPos, 200) self.submit = Button(top, text="Submit", command = drawGraph) self.submit.pack(side=BOTTOM) self.c.delete(ALL) class StopWatch(Frame): def __init__(self, parent=None, **kw): """Creates the watch widget""" Frame.__init__(self, parent, kw) self._start = 0.0 self._elapsed = 0.0 self._running = 0 self.timestr = StringVar() self.makeWidgets() def makeWidgets(self): """Make the label""" l = Label(self, textvariable=self.timestr) self._setTime(self._elapsed) l.pack(fill=X, expand=NO, padx=2, pady=2) def _update(self): """Update the label with the correct time""" self._elapsed=time.time() - self._start self._setTime(self._elapsed) self._timer = self.after(50, self._update) App.self.c.create_line(95,1,105,1) def _setTime(self, elap): """Set time string""" minutes = int(elap/60) seconds = int(elap - minutes*60.0) hundreths = int(((elap - minutes*60.0 - seconds)*100)) self.timestr.set("%02d:%02d:%02d" % (minutes, seconds, hundreths)) def Start(self): if not self._running: self._start = time.time() - self._elapsed self._update() self._running = 1 def Stop(self): """To stop it, DUH""" if self._running: self.after_cancel(self._timer) self._elapsed = time.time() - self._start self._setTime(self._elapsed) self._running = 0 def Reset(self): """Think about it""" if self._running: self.Stop() self._start = time.time() self._elapsed = 0.0 self._setTime(self._elapsed) root=Tk() root.title("Bike Computer") myapp=App(root) root.mainloop() </code></pre>
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