GUI Tests before Integration

GUI_tests.py

import PySimpleGUI as sg

_VARS = {'Networks': ['Network 01', 'Network 02', 'Network 03', 'Network 04'],
         'NetworkStrength': ['-84', '-91', '-53', '-100']}

EDGE_OFFSET = 8     # offset from the left edge for first bar
GRAPH_SIZE = DATA_SIZE = (600, 600)       # size in pixels
GLOBAL_FONT = ('Helvetica', 14)

sg.theme('DarkAmber')

layout = [[sg.Text('WIFI SCANNER', font=GLOBAL_FONT)],
          [sg.Graph(GRAPH_SIZE, (0, 0), DATA_SIZE, k='-GRAPH-')],
          [sg.Button('SCAN FOR WIFI NETWORKS', font=GLOBAL_FONT),
           sg.Exit(font=GLOBAL_FONT)]]

window = sg.Window('Bar Graph', layout, finalize=True)
graph = window['-GRAPH-']       # type: sg.Graph


while True:
    graph.erase()

    print('Getting Networks')

    numNetworks = len(_VARS['Networks'])
    bar_width = (GRAPH_SIZE[0]/numNetworks)-EDGE_OFFSET
    bar_spacing = (GRAPH_SIZE[0]/numNetworks)
    for i in range(numNetworks):
        graph_value = -int(_VARS['NetworkStrength'][i])
        networkName = _VARS['Networks'][i]
        graph.draw_rectangle(top_left=(i * bar_spacing + EDGE_OFFSET,
                                       graph_value),
                             bottom_right=(i * bar_spacing +
                                           EDGE_OFFSET + bar_width, 0),
                             fill_color='lightgreen')

        graph.draw_text(text=networkName, location=(
            i*bar_spacing+EDGE_OFFSET+100, graph_value+10),
            font=GLOBAL_FONT, color='white')

    # Normally at the top of the loop,
    # but because we're drawing the graph first, making it at the bottom
    event, values = window.read()

    if event in (sg.WIN_CLOSED, 'Exit'):
        break


window.close()