TypeError with Cartesian

[MBottinIUT]

Hi,
I tried to add a Cartesian to a ST7735 display.
All the elements (axis, tick, labels...) appear, but when I tried to add some points, I've got a 'TypeError' message.

I post this on Adafruit forum but someone told me to post an issue here.

This is my code

import time
import board
import displayio
import pwmio
import analogio
import busio
import adafruit_st7735r
import terminalio
from adafruit_display_text import label
from adafruit_progressbar.verticalprogressbar import (VerticalProgressBar,VerticalFillDirection,)
import adafruit_simplemath
from adafruit_displayio_layout.widgets.cartesian import Cartesian

luminosite_led = pwmio.PWMOut(board.LED)

potentiometre = analogio.AnalogIn(board.A0)

displayio.release_displays()

# Création des objets nécessaires au pilotage de l'écran
bus_spi = busio.SPI(clock=board.GP10, MOSI=board.GP11, MISO=board.GP12)
bus_affichage = displayio.FourWire(bus_spi, command=board.GP15, chip_select=board.GP13, reset=board.GP14)
ecran = adafruit_st7735r.ST7735R(bus_affichage, width=160, height=128, colstart=2, rowstart=1, rotation=90, bgr=True)

# Création du groupe pour les éléments graphiques sur l'écran
groupe_elements = displayio.Group()

# Création d'un label de texte
Valeur_volt = label.Label(terminalio.FONT, text="V = +x.xx V", color=0xFFFFFF, x=55, y=5)
groupe_elements.append(Valeur_volt)

# Création d'une barre de progression verticale
niveau_tension = VerticalProgressBar((10, 18), (15, 100), direction=VerticalFillDirection.BOTTOM_TO_TOP)
groupe_elements.append(niveau_tension)

# Création d'un graphique cartésien
graphique = Cartesian(
    x=50,  # coordonnée x du coin supérieur gauche du graphique
    y=18,  # coordonnée y du coin supérieur gauche du graphique
    width=100,  # largeur du graphique
    height=100,  # hauteur du graphique
    axes_color=0xFFFFFF,  # couleur des axes
    axes_stroke=2,  # épaisseur des axes en pixels
    tick_color=0xFFFFFF,  # couleur des graduations
    major_tick_stroke=1,  # largeur des graduations en pixels
    major_tick_length=5,  # longueur des graduations en pixels
    tick_label_font=terminalio.FONT,  # police pour les graduations
    font_color=0xFFFFFF,  # couleur de la police
    pointer_radius = 1,
)
groupe_elements.append(graphique)

# Affichage du groupe sur l'écran
ecran.show(groupe_elements)

point_x = 0
point_y = 0

while True :
    # variation de la luminosité de la LED avec le potentiomètre
    luminosite_led.duty_cycle = potentiometre.value
    # Affichage de la tension sur l'écran
    tension = round(((potentiometre.value*3.3)/65535),2)
    Valeur_volt.text = f"V = +{tension} V"
    # Affichage du niveau de tension
    valeur_pourcentage = int(adafruit_simplemath.map_range(potentiometre.value, 0, 65535, 0, 100))
    niveau_tension.value = valeur_pourcentage
    # Affichage d'un point sur le graphique
    point_y = valeur_pourcentage
    graphique.update_pointer(10, 10)
    #graphique._draw_pointers(point_x, point_y)
    point_x = point_x + 1
    if point_x == 100 :
        pointx = 0
    # Pause entre deux points de mesure
    time.sleep(0.05)

Hope you can find what's wrong.
Mike

[FoamyGuy]

Thanks for opening an issue. This is due to an incompatibility with the current API for vectorio module. I've created #60 to update this library to resolve it.

[s-light]

i tested this on a PyBadge and with the fix the simple example is working.
(i modified the position of the plan so it fits on the small pybadge 160x128 screen..)

[MBottinIUT]

Hi, Thank you, now it works with different boards and different displays. It's a really handy widget! However, at the moment I can't draw lines (update_line). I only have a pointer (update_pointer) that moves. Could you add an example of  use in the Circuitpython libraries bundle? Best regards, Mike ********************************************      Michaël BOTTIN - Enseignant   IUT RENNES - Département GEII ******************************************** Le 16/12/2021 03:56:32, foamyguy ***@***.***> a écrit : Closed #59 [#59] via #60 [#60]. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub [#59 (comment)], or unsubscribe [https://github.com/notifications/unsubscribe-auth/AJMNCXOKBG7CEWR5BMGAAGTURFIN5ANCNFSM5JXXJVZA]. Triage notifications on the go with GitHub Mobile for iOS [https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675] or Android [https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub].

[FoamyGuy]

@MBottinIUT There is work underway to draw lines in the cartesian widget. See PR #62 for the current status. I'll be looking into it more over the upcoming weekend so I will probably get merged into the library soon. But you can grab it now from the branch of that PR if you want to give it a try sooner.

[s-light]

Hi Mike,
i had exactly this issue:
issue #61
and created a fix and an example:

• pullrequest Widget cartesian update line bugfix #62
• fixed cartesian.py
• example: examples/displayio_layout_cartesian_lineplot.py

you can copy the cartesian.py and delete the cartesian.mpy file in your library folder to test it...

FoamyGuy was faster with typing ;-)

[MBottinIUT]

Hi Stefan, the module cartesian.py and the method 'update_line' work perfectly well. Thank you. When will this file change be reflected in the Adafruit package? One last question: is it possible to draw a graph with refreshing values? I have tried but I can't see how to clear the data lines from the previous display. As a result, the lines overlap on each pass and after a while I get a memory allocation problem. Thanks in advance and happy Christmas and New Year. Mike ********************************************      Michaël BOTTIN - Enseignant   IUT RENNES - Département GEII ******************************************** Le 17/12/2021 15:29:03, Stefan Krüger ***@***.***> a écrit : Hi Mike, i had exactly this issue: issue #61 [#61] and created a fix and an example: * pullrequest #62 [#62] * fixed cartesian.py [https://github.com/adafruit/Adafruit_CircuitPython_DisplayIO_Layout/blob/c356d2aff5cc153588f65bd1d879a0d8a9a09c9f/adafruit_displayio_layout/widgets/cartesian.py] * example: examples/displayio_layout_cartesian_lineplot.py [https://github.com/adafruit/Adafruit_CircuitPython_DisplayIO_Layout/blob/c356d2aff5cc153588f65bd1d879a0d8a9a09c9f/examples/displayio_layout_cartesian_lineplot.py] you can copy the cartesian.py and delete the cartesian.mpy file in your library folder to test it... — Reply to this email directly, view it on GitHub [#59 (comment)], or unsubscribe [https://github.com/notifications/unsubscribe-auth/AJMNCXL5WLYDKRBGOPTPMFTURNCK3ANCNFSM5JXXJVZA]. Triage notifications on the go with GitHub Mobile for iOS [https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675] or Android [https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub]. You are receiving this because you were mentioned.Message ID: ***@***.***>

[s-light]

Hi Mike,

all your wishes are already on there way 🤣

i just added a clear_lines() function to just do this...
clear all the drawn lines..

currently not possible is to update a already drawn line..
that is something for the future: #63
(much more work to implement...)