%matplotlib inline
from matplotlib import pyplot as plt
import numpy as np

from IPython.html.widgets import interact, interactive, fixed
from IPython.html import widgets
from IPython.display import display

from IPython.display import (
    display_pretty, display_html, display_jpeg,
    display_png, display_json, display_latex, display_svg
)
from IPython.display import SVG

"""
Explanation: Interact Exercise 5
Imports
Put the standard imports for Matplotlib, Numpy and the IPython widgets in the following cell.
End of explanation
"""


s = """
<svg width="100" height="100">
  <circle cx="50" cy="50" r="20" fill="aquamarine" />
</svg>
"""

S = SVG(s)
display(S)

"""
Explanation: Interact with SVG display
SVG is a simple way of drawing vector graphics in the browser. Here is a simple example of how SVG can be used to draw a circle in the Notebook:
End of explanation
"""


def draw_circle(width=100, height=100, cx=25, cy=25, r=5, fill='red'):
    """Draw an SVG circle.
    
    Parameters
    ----------
    width : int
        The width of the svg drawing area in px.
    height : int
        The height of the svg drawing area in px.
    cx : int
        The x position of the center of the circle in px.
    cy : int
        The y position of the center of the circle in px.
    r : int
        The radius of the circle in px.
    fill : str
        The fill color of the circle.
    """
    
    listed = ['<svg width=','"',str(width),'"',' height=','"', str(height),'"', '> <circle cx=','"', str(cx),'"',' cy=','"',
           str(cy),'"',' r=','"', str(r),'"', ' fill=','"',fill,'"',' /> </svg>']
    s = "".join(listed)
    S = SVG(s)
    display(S)
    print(s)
    

draw_circle(cx=30, cy=30, r=30, fill='plum')


assert True # leave this to grade the draw_circle function

"""
Explanation: Write a function named draw_circle that draws a circle using SVG. Your function should take the parameters of the circle  as function arguments and have defaults as shown. You will have to write the raw SVG code as a Python string and then use the IPython.display.SVG object and IPython.display.display function.
End of explanation
"""


w = interactive(draw_circle, width=fixed(300), height=fixed(300), cx=(0,300,1), cy=(0,300,1), r=(0,50,1), fill='red')

c = w.children
assert c[0].min==0 and c[0].max==300
assert c[1].min==0 and c[1].max==300
assert c[2].min==0 and c[2].max==50
assert c[3].value=='red'

"""
Explanation: Use interactive to build a user interface for exploing the draw_circle function:

width: a fixed value of 300px
height: a fixed value of 300px
cx/cy: a slider in the range [0,300]
r: a slider in the range [0,50]
fill: a text area in which you can type a color's name

Save the return value of interactive to a variable named w.
End of explanation
"""


display(w)

assert True # leave this to grade the display of the widget

"""
Explanation: Use the display function to show the widgets created by interactive:
End of explanation
"""


