adafruit/Adafruit_CircuitPython_DisplayIO_Layout

TypeError with Cartesian

MBottinIUT opened this issue · 7 comments

MBottinIUT commented

image_2021-12-10_001406

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 commented

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.

  • ❤️1
s-light commented

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 commented
FoamyGuy commented

@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 commented

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

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 commented
s-light commented

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...)