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+--- Thread: Canvas not placing inside Grid (/thread-6420.html)
Canvas not placing inside Grid - leonv - Nov-21-2017
I am trying to build a fairly simple GUI that will allow me to use GPIO pins on a Raspberry PI 3. I am using grid to place the labels, buttons and indicators on the gui. I want the indicators to look like LEDs. I'm trying to use canvas (and Oval) to create the indicators. I can't get the Canvas items to appear inside the grid. It places them outside (as if creating a new grid).
Here's the code snippet:
from tkinter import *
import time
import RPi.GPIO as GPIO
LedPin1 = 11 # pin11
LedPin2 = 12 # pin12
Switch1 = 15
Switch2 = 16
class Application(Frame):
"""MyeVault BU Box Controller"""
def __init__(self, master):
super(Application, self).__init__(master)
self.grid()
self.create_widgets()
def create_widgets(self):
"""Create widgets"""
Label(self, text="Actions").grid(row = 0, column = 0)
self.canvasPwr=Canvas(root, width=20, height=20, background='yellow')
self.canvasPwr.grid(row=2,column=1)
canvasLED=Canvas(root, width=20, height=20, background='green')
canvasLED.grid(row=4,column=1)
Label(self, text="Status").grid(row=0, column = 1)
PowerLED = Label(self, text="Power LED", bg ="yellow")
PowerLED.grid(row=1, column = 1)
Label(self, text="HDD Activity").grid(row=3, column = 1)
self.button_reset = Button(self)
self.button_reset["text"] = "Reset"
#self.button_reset (bg ="white")
self.button_reset["command"] = self.Reset
self.button_reset.grid(row = 1, column = 0)
self.button_tapPower = Button(self)
self.button_tapPower["text"]= "Tap Power Button"
self.button_tapPower["command"]= self.tapPower
self.button_tapPower.grid(row = 2, column = 0)
self.button_holdPower = Button(self)
self.button_holdPower["text"]= "Hold Power Button"
self.button_holdPower["command"]= self.holdPower
self.button_holdPower.grid(row = 3, column = 0)
and here's the result:[Image: gui.JPG]
Much Appreciation for assistance!
Leon
RE: Canvas not placing inside Grid - Larz60+ - Nov-21-2017
The first thing you do when you instantiate your class is create a frame.
When you create your canvas, you use root as the parent. Change that to self
which is the frame. The root window is underneath the frame, and not visible.
RE: Canvas not placing inside Grid - leonv - Nov-21-2017
That's it. Thank you so much!