# Tk_wave_controls.py

# Tk_wave_controls.py

from Tkinter import *
import math

root = Tk()
root.title("Tk Wave Controls")

ww=800
hh=600
fram = Frame(root)
Label(fram,text='f(x):').pack(side=LEFT)
func = Entry(fram, width=50)
func.pack(side=LEFT, fill=BOTH, expand=1)
fram.pack(side=TOP)

fram = Frame(root)

bbxy = 'minX', 'maxX', 'minY', 'maxY'

bounds = []
for label in bbxy:
    Label(fram,text=label+':').pack(side=LEFT)
    edit = Entry(fram, width=6)
    edit.pack(side=LEFT)
    bounds.append(edit)
fram.pack(side=TOP)

c = Canvas(root, width=ww, height=hh, bg='green')
c.pack(side=TOP, fill=BOTH, expand=1)

def minimax(values=[0.0, 10.0, -2.0, 2.0]):
    for i in range(4):
        edit = bounds[i]
        try: values[i] = float(edit.get())
        except: pass
        edit.delete(0, END)
        edit.insert(END, '%.2f'%(values[i]*0.1))
    return values

def plot(nil=0):
    minx, maxx, miny, maxy = [z*0.1 for z in minimax(values)]

    f = func.get()
    f = compile(f, f, 'eval')

    CX = c.winfo_width()
    if CX/5 > 4:
        CY = c.winfo_height()
        c.delete(ALL)
        for i in range(0,CX):
            x = minx + ((maxx-minx)*i)/CX
            y = eval(f, vars(math), {'x':x})
            j = CY*(y-miny)/max(0.01,(maxy-miny))
            c.create_line(i,j,i,CY,fill='purple')


f = 'sin(x) + cos(x) + (x**2*0.01)'
func.insert(END, f)
values = minimax()

SlideTest = 1

if SlideTest:
    root2 = Tk()
    root2.title("Tk Qwikfix Sliders")
    vars_init = bbxy

    def refresh():
        try:
            canvas.update()
        except:
            pass

    def getSliderValues(nil=0):
        global SlideTest
        if SlideTest > len(bbxy):
            sliderVector = []
            for z in range(len(cvars)):
                t = w[z].get()
                edit = bounds[z]
                edit.delete(0, END)
                edit.insert(END, '%.2f'%t)
                sliderVector.append('%.2f'%(float(t)/10))
            plot()
            print '\t\t'.join(sliderVector)
        else:
            SlideTest += 1

    sliderframes = Frame(root2)
    sliderframes.pack(side=TOP)

    slider = {}
    cvars = {}

    iframe = Frame(root2)
    iframe.pack(side=BOTTOM)

    w = {}
    for z in range(len(vars_init)):
        VAR = vars_init[z].replace(' ','')
        slider[z] = Frame(sliderframes)
        slider[z].pack(side=TOP)
        cvars[z] = DoubleVar()
        FROM, TO, L = -500, 500, 1000
        if ',' in VAR:
            t = VAR.split(',')[0]
            VAR = "'"+t+"'"+VAR[len(t):]
            VAR, FROM, TO = eval(VAR)
        w[z] = Scale(slider[z], from_=FROM, to=TO, variable=cvars[z], length=L, orient=HORIZONTAL, command=getSliderValues)
        w[z].set(values[z]*10)
        w[z].pack(side=TOP)
        L = Label(slider[z], text=VAR)
        L.pack(side=TOP)

    getSliderValues()


root.mainloop()