class App:
def __init__(self, master):
from Tkinter import Label, Entry, Canvas, Button
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
from matplotlib.figure import Figure
Label(master, text="Initial conditions:").grid(row=0, column=0, columnspan=2)
Label(master, text="x").grid(row=1, column=0)
Label(master, text="y").grid(row=2, column=0)
Label(master, text="p_x").grid(row=3, column=0)
Label(master, text="p_y").grid(row=4, column=0)
Label(master, text="steps").grid(row=5, column=0)
Button(master, text="Plot", command=self.replot).grid(row=6, column=0, columnspan=2)
self.x = Entry(master)
self.y = Entry(master)
self.px = Entry(master)
self.py = Entry(master)
self.steps = Entry(master)
self.x.grid(row=1, column=1)
self.y.grid(row=2, column=1)
self.px.grid(row=3, column=1)
self.py.grid(row=4, column=1)
self.steps.grid(row=5, column=1)
self.x.insert(0, 25.)
self.y.insert(0, 0.)
self.px.insert(0, 0.)
self.py.insert(0, 0.2)
self.steps.insert(0, 1000)
self.blackhole = Blackhole()
self.resetInitialConditions()
self.figure = Figure(figsize=(6,5), dpi=100)
self.a = self.figure.add_subplot(111)
self.canvas = FigureCanvasTkAgg(self.figure, master=master)
self.canvas.show()
self.canvas.get_tk_widget().grid(row=0, column=2, rowspan=7)
def resetInitialConditions(self):
self.blackhole.setInitialConditions(
float(self.x.get()),
float(self.y.get()),
float(self.px.get()),
float(self.py.get()))
def replot(self):
self.resetInitialConditions()
xs = []
ys = []
for i in xrange(int(self.steps.get())):
x,y = self.blackhole.getPosition()
xs.append(x)
ys.append(y)
self.blackhole.evolve(0.005)
self.a.clear()
self.a.plot(xs, ys)
self.canvas.draw()
