From 54f53991a0e78059df609a41c18c70fd3986af47 Mon Sep 17 00:00:00 2001
From: PySimpleGUI <PySimpleGUI@PySimpleGUI.com>
Date: Sun, 15 Dec 2019 12:14:55 -0500
Subject: [PATCH] Draws Axis, moves the individual lines instead of the graph.

---
 DemoPrograms/Demo_Graph_Noise.py | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/DemoPrograms/Demo_Graph_Noise.py b/DemoPrograms/Demo_Graph_Noise.py
index 6161c2d6..be6f0d42 100644
--- a/DemoPrograms/Demo_Graph_Noise.py
+++ b/DemoPrograms/Demo_Graph_Noise.py
@@ -7,6 +7,8 @@ import sys
     Example of random line in Graph element.
 '''
 
+sg.change_look_and_feel('black')
+
 STEP_SIZE = 1
 SAMPLES = 300
 SAMPLE_MAX = 300
@@ -17,7 +19,7 @@ def main():
     global g_exit, g_response_time
 
     layout = [[sg.Text('Enter width, height of graph')],
-              [sg.Input(size=(6, 1), key='w'), sg.Input(size=(6, 1), key='h')],
+              [sg.Input(300, size=(6, 1), key='w'), sg.Input(300, size=(6, 1), key='h')],
               [sg.Ok(), sg.Cancel()]]
 
     window = sg.Window('Enter graph size', layout)
@@ -34,18 +36,22 @@ def main():
     sg.set_options(element_padding=(0, 0))
 
     layout = [[sg.Button('Quit', button_color=('white', 'black'))],
-              [sg.Graph(CANVAS_SIZE, (0, 0), (SAMPLES, SAMPLE_MAX)
+              [sg.Graph(CANVAS_SIZE, (0, 0), (SAMPLES, SAMPLE_MAX),
                         background_color='black', key='graph')], ]
 
     window = sg.Window('Canvas test', layout, grab_anywhere=True,
                        background_color='black', no_titlebar=False,
                        use_default_focus=False, finalize=True)
-    graph = window['graph']
+    graph = window['graph']     # type:sg.Graph
+
+    graph.draw_line((SAMPLES//2, 0), (SAMPLES//2,SAMPLE_MAX),color='white')
+    graph.draw_line((0,SAMPLE_MAX//2), (SAMPLES, SAMPLE_MAX//2),color='white')
 
     prev_response_time = None
     i = 0
     prev_x, prev_y = 0, 0
     graph_value = 250
+    figures = []
     while True:
         event, values = window.read(timeout=0)
         if event == 'Quit' or event is None:
@@ -63,10 +69,15 @@ def main():
         prev_value = graph_value
 
         if i >= SAMPLES:
-            graph.move(-STEP_SIZE, 0)
+            graph.delete_figure(figures[0])
+            figures = figures[1:]
+            for count, figure in enumerate(figures):
+                graph.move_figure(figure, -STEP_SIZE, 0)
             prev_x = prev_x - STEP_SIZE
 
-        graph.draw_line((prev_x, prev_y), (new_x, new_y), color='white')
+        # print(f'io={i} {prev_x,prev_y} to {new_x, new_y}')
+        last_figure = graph.draw_line((prev_x, prev_y), (new_x, new_y), color='white')
+        figures.append(last_figure)
         prev_x, prev_y = new_x, new_y
         i += STEP_SIZE if i < SAMPLES else 0