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Fixed typo in formula. Added normal Demo Program header. Changed axis drawing to adapt to size of coordinate, Changed font sizes, Made title and sliders expand in X direction. Draw empty axis upon startup

This commit is contained in:
PySimpleGUI 2022-06-05 08:08:22 -04:00
parent c82747e8d4
commit ae1fd61041
1 changed files with 43 additions and 23 deletions
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64
DemoPrograms/Demo_Graph_Element_Sine_Wave.py
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@ -1,11 +1,30 @@
import PySimpleGUI as sg import PySimpleGUI as sg
import math import math
# Yet another usage of Graph element. """
Demo - Graph Element used to plot a mathematical formula
The Graph element has a flexible coordinate system that you define.
Thie makes is possible for you to work in your coordinates instead of an
arbitrary system.
For example, in a typical mathematics graph, (0,0) is located at the center
of the graph / page / diagram.
This Demo Program shows a graph with (0,0) being at the center of the Graph
area rather than at one of the corners.
It graphs the formula:
y = sine(x/x2) * x1
The values of x1 and x2 can be changed using 2 sliders
Copyright 2018, 2019, 2020, 2021, 2022 PySimpleGUI
"""
SIZE_X = 200 SIZE_X = 200
SIZE_Y = 100 SIZE_Y = 200
NUMBER_MARKER_FREQUENCY = 25 NUMBER_MARKER_FREQUENCY = SIZE_X//8 # How often to put tick marks on the axis
def draw_axis(): def draw_axis():
@ -13,42 +32,43 @@ def draw_axis():
graph.draw_line((0, -SIZE_Y), (0, SIZE_Y)) graph.draw_line((0, -SIZE_Y), (0, SIZE_Y))
for x in range(-SIZE_X, SIZE_X+1, NUMBER_MARKER_FREQUENCY): for x in range(-SIZE_X, SIZE_X+1, NUMBER_MARKER_FREQUENCY):
graph.draw_line((x, -3), (x, 3)) # tick marks graph.draw_line((x, -SIZE_Y/66), (x, SIZE_Y/66)) # tick marks
if x != 0: if x != 0:
# numeric labels # numeric labels
graph.draw_text(str(x), (x, -10), color='green') graph.draw_text(str(x), (x, -SIZE_Y/15), color='green', font='courier 10')
for y in range(-SIZE_Y, SIZE_Y+1, NUMBER_MARKER_FREQUENCY): for y in range(-SIZE_Y, SIZE_Y+1, NUMBER_MARKER_FREQUENCY):
graph.draw_line((-3, y), (3, y)) graph.draw_line((-SIZE_X/66, y), (SIZE_X/66, y))
if y != 0: if y != 0:
graph.draw_text(str(y), (-10, y), color='blue') graph.draw_text(str(y), (-SIZE_X/11, y), color='blue', font='courier 10')
sg.theme('DarkAmber') # Create the graph that will be put into the window. Making outside of layout so have element in a variable
graph = sg.Graph(canvas_size=(500, 500),
# Create the graph that will be put into the window
graph = sg.Graph(canvas_size=(400, 400),
graph_bottom_left=(-(SIZE_X+5), -(SIZE_Y+5)), graph_bottom_left=(-(SIZE_X+5), -(SIZE_Y+5)),
graph_top_right=(SIZE_X+5, SIZE_Y+5), graph_top_right=(SIZE_X+5, SIZE_Y+5),
background_color='white', background_color='white', expand_x=True, expand_y=True,
key='graph') key='-GRAPH-')
# Window layout # Window layout
layout = [[sg.Text('Example of Using Math with a Graph', justification='center', size=(50, 1), relief=sg.RELIEF_SUNKEN)], layout = [[sg.Text('Graph Element Combined with Math!', justification='center', relief=sg.RELIEF_SUNKEN, expand_x=True, font='Courier 18')],
[graph], [graph],
[sg.Text('y = sin(x / x2 * x1)', font='COURIER 18')], [sg.Text('y = sin(x / x2) * x1', font='COURIER 18')],
[sg.Text('x1'), sg.Slider((0, 200), orientation='h', [sg.Text('x1', font='Courier 14'), sg.Slider((0, SIZE_Y), orientation='h', enable_events=True, key='-SLIDER-', expand_x=True)],
enable_events=True, key='-SLIDER-')], [sg.Text('x2', font='Courier 14'), sg.Slider((1, SIZE_Y), orientation='h', enable_events=True, key='-SLIDER2-', expand_x=True)]]
[sg.Text('x2'), sg.Slider((1, 200), orientation='h', enable_events=True, key='-SLIDER2-')]]
window = sg.Window('Graph of Sine Function', layout) window = sg.Window('Graph of Sine Function', layout, finalize=True)
draw_axis() # draw the axis (an empty graph)
while True: while True:
event, values = window.read() event, values = window.read()
if event == sg.WIN_CLOSED: if event == sg.WIN_CLOSED:
break break
graph.erase()
draw_axis()
prev_x = prev_y = None
graph.erase() # erase entire graph every time there's a change to a slider
draw_axis() # redraw the axis
# plot the function by drawing short line segments
prev_x = prev_y = None
for x in range(-SIZE_X, SIZE_X): for x in range(-SIZE_X, SIZE_X):
y = math.sin(x/int(values['-SLIDER2-'])) * int(values['-SLIDER-']) y = math.sin(x/int(values['-SLIDER2-'])) * int(values['-SLIDER-'])
if prev_x is not None: if prev_x is not None: