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Exception protection if something happens in the drawing of a figure. Added to code to ensure previously packed canvas is not packed again.

This commit is contained in:
PySimpleGUI 2022-08-05 13:48:11 -04:00
parent 8ef45d6643
commit 244cff57a4
2 changed files with 33 additions and 10 deletions
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20
DemoPrograms/Demo_Matplotlib_Browser.py
View File

@ -824,15 +824,26 @@ def AxesGrid():
# The magic function that makes it possible.... glues together tkinter and pyplot using Canvas Widget # The magic function that makes it possible.... glues together tkinter and pyplot using Canvas Widget
def draw_figure(canvas, figure): def draw_figure(canvas, figure):
if not hasattr(draw_figure, 'canvas_packed'):
draw_figure.canvas_packed = {}
figure_canvas_agg = FigureCanvasTkAgg(figure, canvas) figure_canvas_agg = FigureCanvasTkAgg(figure, canvas)
figure_canvas_agg.draw() figure_canvas_agg.draw()
figure_canvas_agg.get_tk_widget().pack(side='top', fill='both', expand=1) widget = figure_canvas_agg.get_tk_widget()
if widget not in draw_figure.canvas_packed:
draw_figure.canvas_packed[widget] = figure
widget.pack(side='top', fill='both', expand=1)
return figure_canvas_agg return figure_canvas_agg
def delete_figure_agg(figure_agg): def delete_figure_agg(figure_agg):
figure_agg.get_tk_widget().forget() figure_agg.get_tk_widget().forget()
try:
draw_figure.canvas_packed.pop(figure_agg.get_tk_widget())
except Exception as e:
print(f'Error removing {figure_agg} from list', e)
plt.close('all') plt.close('all')
# -------------------------------- GUI Starts Here -------------------------------# # -------------------------------- GUI Starts Here -------------------------------#
# fig = your figure you want to display. Assumption is that 'fig' holds the # # fig = your figure you want to display. Assumption is that 'fig' holds the #
# information to display. # # information to display. #
@ -873,6 +884,9 @@ while True:
choice = values['-LISTBOX-'][0] # get first listbox item chosen (returned as a list) choice = values['-LISTBOX-'][0] # get first listbox item chosen (returned as a list)
func = fig_dict[choice] # get function to call from the dictionary func = fig_dict[choice] # get function to call from the dictionary
window['-MULTILINE-'].update(inspect.getsource(func)) # show source code to function in multiline window['-MULTILINE-'].update(inspect.getsource(func)) # show source code to function in multiline
fig = func() # call function to get the figure try:
figure_agg = draw_figure(window['-CANVAS-'].TKCanvas, fig) # draw the figure fig = func() # call function to get the figure
figure_agg = draw_figure(window['-CANVAS-'].TKCanvas, fig) # draw the figure
except Exception as e:
print('Exception in fucntion', e)
window.close() window.close()

23
DemoPrograms/Demo_Matplotlib_Browser_Paned.py
View File

@ -837,14 +837,23 @@ def AxesGrid():
def draw_figure(canvas, figure): def draw_figure(canvas, figure):
if not hasattr(draw_figure, 'canvas_packed'):
draw_figure.canvas_packed = {}
figure_canvas_agg = FigureCanvasTkAgg(figure, canvas) figure_canvas_agg = FigureCanvasTkAgg(figure, canvas)
figure_canvas_agg.draw() figure_canvas_agg.draw()
figure_canvas_agg.get_tk_widget().pack(side='top', fill='both', expand=1) widget = figure_canvas_agg.get_tk_widget()
if widget not in draw_figure.canvas_packed:
draw_figure.canvas_packed[widget] = figure
widget.pack(side='top', fill='both', expand=1)
return figure_canvas_agg return figure_canvas_agg
def delete_figure_agg(figure_agg): def delete_figure_agg(figure_agg):
figure_agg.get_tk_widget().forget() figure_agg.get_tk_widget().forget()
try:
draw_figure.canvas_packed.pop(figure_agg.get_tk_widget())
except Exception as e:
print(f'Error removing {figure_agg} from list', e)
plt.close('all') plt.close('all')
@ -881,13 +890,11 @@ layout = [[sg.Text('Matplotlib Plot Test', font=('ANY 18'))],
[sg.Col(col_listbox), col_instructions], ] [sg.Col(col_listbox), col_instructions], ]
# create the form and show it without the plot # create the form and show it without the plot
window = sg.Window('Demo Application - Embedding Matplotlib In PySimpleGUI', window = sg.Window('Demo Application - Embedding Matplotlib In PySimpleGUI', layout, resizable=True, finalize=True)
layout, resizable=True, finalize=True)
canvas_elem = window['-CANVAS-'] canvas_elem = window['-CANVAS-']
multiline_elem = window['-MULTILINE-'] multiline_elem = window['-MULTILINE-']
figure_agg = None figure_agg = None
while True: while True:
event, values = window.read() event, values = window.read()
if event in (sg.WIN_CLOSED, 'Exit'): if event in (sg.WIN_CLOSED, 'Exit'):
@ -902,6 +909,8 @@ while True:
func = fig_dict[choice] func = fig_dict[choice]
# show source code to function in multiline # show source code to function in multiline
window['-MULTILINE-'].update(inspect.getsource(func)) window['-MULTILINE-'].update(inspect.getsource(func))
fig = func() # call function to get the figure try:
figure_agg = draw_figure( fig = func() # call function to get the figure
window['-CANVAS-'].TKCanvas, fig) # draw the figure figure_agg = draw_figure(window['-CANVAS-'].TKCanvas, fig) # draw the figure
except Exception as e:
print('Error in plotting', e)