tkinter-canvas

问题 I'm trying to make a dice object, and I want to be able to control the pip colors. I created the pips with a black fill, and I tried to change one to red using self.canvas.itemconfigure(self.pip1, fill='red') but it seems to have no effect. There is no error so I'm wondering why the change doesn't show up. Minimum working example: from tkinter import * from tkinter import ttk class Dice: #the x and y instancing variables are for the x and y coordinates of the top left corner of the rectangle

问题 I am working on adding drag-able labels on top of a background image, where the labels are images with a transparent background. The images used for the label themselves are transparent, but the Label itself is not transparent in relation to its parent canvas. Since the labels are drag-able, I can't easily use the parent image for label, and paste the transparent image on top. The dragon is a drag-able label, with a transparent background, but you see that the label itself is not transparent,

问题 Trying to delete a random shape on canvas by clicking the "remove rect" button created. but my method doesn't seem to work. I keep getting this error, must be small but I can't seem to find it. TypeError: removeRects() missing 1 required positional argument: 'canvas' from tkinter import * import random root = Tk() class Recta: def __init__(self, height=60, width=80): self.height = height self.width = width self.create_buttons() self.canvas = Canvas(root) self.canvas.pack() def removeRects

问题 I have a tkinter application that can plot a large number of data, where I have noticed poor pan and zoom performance when there is a large number of data on the canvas. Looking into the tkagg_backend (as suggested by this and several other questions), the function and documentation suggests that the canvas should only be redrawn once the user is idle. However, from current and previous experience the canvas has always been updating(redrawing) mid zoom/pan. Therefore, I was looking at the

问题 I have a canvas in a frame photoFrame = Frame(centerFrame, width=250, height=190, bg="#EBEBEB") photoFrame.grid(row=0, column=1, sticky="nsew") photoCanvas = Canvas(photoFrame, bg="#EBEBEB") photoCanvas.grid(row=0, column=0, sticky="nsew") and I try to put a scrollbar to my canvas with this photoScroll = Scrollbar(photoFrame, orient=VERTICAL) photoScroll.config(command=photoCanvas.yview) photoCanvas.config(yscrollcommand=photoScroll.set) photoScroll.grid(row=0, column=1, sticky="ns") The

问题 I'm using a Windows10 system. I have a Tkinter canvas which has an image drawn on it. Is there any way to slow down mouse pointer speed when it is hovering over the canvas? I've checked out this link and this link but the answer seems unstable.. To be more specific, is it possible to slow down mouse pointer speed in plain Python/Tkinter? 回答1: On windows system you can use native SystemParametersInfo to change speed of the mouse pointer. It's possible to implement via ctype, which is part of

问题 Using Python 3.6/tkinter on MacOS, I created a frame within a canvas and bound a scrollbar to it. This all works fine. The problem is when I try to snag MouseWheel events when the cursor is in the scrollable frame. I set up a binding: main_window.bind("<MouseWheel>",on_mousewheel) and created a short dummy event handler: def on_mousewheel(event): print(event.delta) Every time I use the scroll wheel, Python responds with: Traceback (most recent call last): File "/Users/Gary/IPPS/opendb.py",

问题 Background I am trying - and succeeding - in creating a simple plot using using the Canvas object within tkinter . I am trying to use as many tools that are installed with Python3 as possible. Matplotlib and others are great, but they are pretty large installs for something that I'm trying to keep a bit smaller. The plots are updated every 0.5s based on input from a hardware device. The previous 128 points are deleted and the current 128 points are drawn. See my most recent blog post for a

问题 Entirety of my code is here. Using tkinter's canvas, I am trying to create a small game that allows people to practice learning the notes on the treble clef. A random note is initially displayed and the user must select the correct note. I am unable to edit the canvas to display a new note's image if the student got the correct answer. Can somebody please explain what the problem is with my code? while True: randomNote = randint(0, 11) path = noteFiles[randomNote] correctNote = notes

问题 I want to rotate an oval around it's center. Currently I can display the static object witohut rotation, and I can't seem to find what to do wit it. EDIT: I made a rotation function based on complex number multiplication, which seemed to work on lower polygons but the ellipse kinda looks the same. A potato-level noob C.S. student. also, the code: from tkinter import* import cmath, math import time def poly_rot(tup, deg): rad=deg*0.0174533 crot=cmath.exp(rad*1j) rotpol=[] i=0 while i < len(tup