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PolyPlot.py
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PolyPlot.py
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import re
from tkinter import *
import argparse
import tkinter as ttk
import matplotlib.pyplot as plt
from matplotlib.backends.backend_tkagg import (
FigureCanvasTkAgg,
NavigationToolbar2Tk
)
import numpy as np
import enum
import tkinter.messagebox
class Errors(enum.Enum):
VALID = 0 # VALID STATE
MIN_MAX = 1 # X-MAX IS LESS THAN X-MIN
INV_FUNC = 2 # NON-VALID FUNCTION
RNG_CAST = 3 # NOT NUMERIC VALUES OF X-RANGE
RNG_LIMIT = 4 # RANGE IS OVER THE LIMIT
class App(ttk.Tk):
def __init__(self,enableTests):
super().__init__()
self.TEST_MODE = enableTests
self.instructions_message = \
"""
Welcome To PolyPlot:
You can now plot polynomial functions in one variable (x) using PolyPlot
Operations Allowed:
1- Addition +
2- Subtraction -
3- Multiplication *
4- Division /
5- Power ^
Minimum value of x is -10000
Maximum value of x is 10000
"""
self.title("PolyPlot")
self.WIN_WIDTH = 900
self.WIN_HEIGHT = 700
self.X_MAX_RANGE = 10000
self.geometry(f"{self.WIN_WIDTH}x{self.WIN_HEIGHT}")
self.resizable(0,0)
self.buildUI()
if self.TEST_MODE:
self.runTests()
def processInput(self):
"""Reads all the inputs and process them and check their validity"""
#Check Min-Max Numeric Values:
try:
xmin = float(self.range_start.get())
xmax = float(self.range_end.get())
except:
self.showError("Range Error","Range Values must be numeric")
return Errors.RNG_CAST,"",""
#Check Min-Max If They Exceeded The Limit
if xmin<-1*self.X_MAX_RANGE or xmax>self.X_MAX_RANGE:
self.showError("Range Error","Check The Range permitted in the instructions")
return Errors.RNG_LIMIT,"",""
#Check that Min-val is less than Max-val:
if xmin>=xmax:
self.showError("Range Error","Minimum value must be less than Maximum value of X")
return Errors.MIN_MAX,"",""
# Check Function Validity:
expr = str(self.exp_field.get()).lower().replace('^', '**')
try:
if expr=="" or not bool(re.match(r"(?:[0-9-+*/^()x])+", expr)) or expr.count('x')==0:
raise Exception()
x = np.arange(xmin,xmax,step=0.01)
y = eval(expr)
except:
self.showError("Invalid Function","Please enter a valid function. Check Instructions")
return Errors.INV_FUNC,"",""
return Errors.VALID,x,y
def showError(self,title,mess):
if not self.TEST_MODE:
tkinter.messagebox.showerror(title,mess)
def Plot(self):
self.deleteFigureAndNavBar()
"""Plots the function within the range in spinboxes - called by plot button"""
status,x,y = self.processInput()
if status!=Errors.VALID:
return
fig = plt.Figure(figsize=(6,4), dpi=100)
fig.patch.set_facecolor('gray')
fig.patch.set_alpha(0.1)
ax = fig.add_subplot()
ax.set_facecolor('lightblue')
ax.set_ylabel('F(x)')
ax.set_xlabel('x')
ax.grid(color='black',linewidth=0.1)
ax.plot(x,y)
self.CreateCanv(fig)
def deleteFigureAndNavBar(self):
"""Delete the plotting widget - called by press clear button"""
if hasattr(self,'nav_frame'):
self.nav_frame.destroy()
for slave in self.place_slaves():
if(str(type(slave))=="<class 'tkinter.Canvas'>"):
slave.destroy()
def CreateCanv(self,fig):
"""" Create a widget for plotting on it """
self.nav_frame = ttk.Frame(self)
canvas = FigureCanvasTkAgg(fig,self)
nav_bar = NavigationToolbar2Tk(canvas,self.nav_frame)
canv = canvas.get_tk_widget()
nav_bar.grid(row=0,column=2,pady=5)
canv.place(height=500,width=900,x=0,y=200)
self.nav_frame.pack()
def buildUI(self):
"""Builds User Interface"""
input_frame = Frame(self)
input_frame.configure(height=500)
exp_label = Label(input_frame,font=('arial',15,'bold'),text='F(x): ',bd=0,padx= 10,pady=10,fg='blue')
exp_label.grid_configure(row=0,column=0,sticky='w')
self.exp_field = Entry(input_frame, font=('arial',10),bd=5,width=self.WIN_WIDTH//8)
self.exp_field.grid_configure(row=0,column=1,columnspan=10)
#from label
fromx_label = Label(input_frame,font=('arial',15,'bold'),text='From x: ',bd=0,padx=10,fg='blue')
fromx_label.grid_configure(row=1,column=0,sticky='w')
#start of the range of x
start = StringVar()
start.set('-100')
self.range_start = Spinbox(input_frame, from_ = -self.X_MAX_RANGE, to = self.X_MAX_RANGE,bd=5,textvariable=start)
self.range_start.grid_configure(row=1,column=1,sticky='w')
#to label
tox_label = Label(input_frame,font=('arial',15,'bold'),text='To x: ',bd=0,padx=10,fg='blue')
tox_label.grid_configure(row=1,column=2,sticky='w')
#end of the range of x
end = StringVar()
end.set('100')
self.range_end = Spinbox(input_frame, from_ = -self.X_MAX_RANGE, to = self.X_MAX_RANGE,bd=5,textvariable=end)
self.range_end.grid_configure(row=1,column=3,sticky='w')
# plot button
plot_button = Button(input_frame,text='Plot',width=10,bg='lightblue',command=self.Plot)
plot_button.grid(row=1, column=4, padx=10, pady=15,sticky='e')
plot_button = Button(input_frame, text='Clear',width=10,bg='red',command=self.deleteFigureAndNavBar)
plot_button.grid(row=1, column=5, padx=10, pady=15,sticky='e')
plot_button = Button(input_frame, text='Show Instructions',width=20,bg='lightgreen',command=self.showInstructions)
plot_button.grid(row=2, column=0, padx=10, pady=15,sticky='w',columnspan=3)
input_frame.pack()
def showInstructions(self):
tkinter.messagebox.showinfo('Instructions',self.instructions_message)
def runTests(self):
self.exp_field.insert(0,"")
status,x,y = self.processInput()
if status==Errors.INV_FUNC:
print("TEST 1 EMPTY_FUNCTION: PASSED")
else:
print("TEST 1 EMPTY_FUNCTION: FAILED")
self.exp_field.insert(0,"mess")
status,x,y = self.processInput()
if status==Errors.INV_FUNC:
print("TEST 2 INVALID_FUNC: PASSED")
else:
print("TEST 2 INVALID_FUNC: FAILED")
self.exp_field.delete(0,10)
self.exp_field.insert(0,"x")
status,x,y = self.processInput()
if status==Errors.VALID:
print("TEST 3 VALID_FUNC: PASSED")
else:
print("TEST 3 VALID_FUNC: FAILED")
self.range_start.delete(0,10)
self.range_start.insert(0,"A")
status,x,y = self.processInput()
if status==Errors.RNG_CAST:
print("TEST 4 INVALID_RANGE: PASSED")
else:
print("TEST 4 INVALID_RANGE: FAILED")
self.range_start.delete(0,10)
self.range_start.insert(0,"10")
self.range_end.insert(0,"10000000")
status,x,y = self.processInput()
if status==Errors.RNG_LIMIT:
print("TEST 5 RANGE_LIMIT: PASSED")
else:
print("TEST 5 RANGE_LIMIT: FAILED")
self.range_start.delete(0,20)
self.range_start.insert(0,"5")
self.range_end.delete(0,20)
self.range_end.insert(0,"-5")
status,x,y = self.processInput()
if status==Errors.MIN_MAX:
print("TEST 6 MIN_MAX : PASSED")
else:
print("TEST 6 MIN_MAX : FAILED")
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument('--test')
args = parser.parse_args()
if args.test == "true":
app = App(enableTests=True)
else:
app = App(enableTests=False)
app.mainloop()