Question

我无法在交互式程序中覆盖或清除画布。它绘制了一个新图（总共2个图），但是它只是通过左键在左框架中展开，它会被覆盖，但在框架中看不到。我只想要一帧，然后再按一下按钮即可。我尝试了有关画布更新或清除的建议，但没有用

谢谢！

import tkinter as tk
from tkinter import ttk
from tkinter import messagebox
from tkinter import filedialog
from tkinter import messagebox
from wrf import (to_np,interplevel, getvar, smooth2d, get_cartopy, cartopy_xlim,get_basemap,
                 cartopy_ylim, latlon_coords)
from netCDF4 import Dataset
import numpy as np
import matplotlib.pyplot as plt
from matplotlib.cm import get_cmap
import cartopy.crs as crs
from cartopy.feature import NaturalEarthFeature
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2Tk
from matplotlib.figure import Figure

window = tk.Tk()
window.geometry("1080x640")
window.title("Welcome to 1st App")

frame_left = tk.Frame(window,width=540,height=640)
frame_left.pack(side=tk.LEFT, fill=tk.BOTH, expand=1)  #,padx=10,pady=10)
frame_right = tk.Frame(window,width=100,height=640,bg="green")
frame_right.pack(side=tk.RIGHT, fill=tk.BOTH, expand=1) #padx=10,pady=10)

menubar = tk.Menu(window)
count = 0
timeidx = 0

def veriSec():
    global path
    path = filedialog.askopenfilename(title="select a file",
                                      initialdir="/home/onurhdogan/Downloads/wrf_veri/vdfcreatedeneme")
veriSec()

def openImage():
    global img_name
    global count
#    count += 1
    #    if count != 1:
    #   messagebox.showinfo(title="Uyari",message="Tek bir imaj secilebilir")
    #else :
        #Frame1()



def Frame1():
    fig = Figure(figsize=(6, 6))
    a = fig.add_subplot(111)
    file = Dataset(str(path))
    #fig = Figure(figsize=(6, 6))
    #fig.clf()
    #a = fig.add_subplot(111)
    # Get the sea level pressure
    slp = getvar(file, "slp", timeidx=0)
    # Smooth the sea level pressure since it tends to be noisy near the mountains
    smooth_slp = smooth2d(slp, 3, cenweight=4)
    # Get the latitude and longitude points
    lats, lons = latlon_coords(slp)
    # Get the basemap object
    bm = get_basemap(slp, ax=a, resolution='l', area_thresh=1000)
    # Add geographic outlines
    bm.drawcoastlines(linewidth=0.25)
    bm.drawstates(linewidth=0.25)
    bm.drawcountries(linewidth=0.25)
    # Convert the lats and lons to x and y.  Make sure you convert the lats and lons to numpy arrays via to_np, or basemap crashes with an undefined
    x, y = bm(to_np(lons), to_np(lats))
    # Draw the contours and filled contours
    bm.contour(x, y, to_np(smooth_slp), 10, colors="black")
    bm.contourf(x, y, to_np(smooth_slp), 10, cmap=get_cmap("jet"))
    # plt.colorbar(shrink=.62)
    a.set_title("Sea Level Pressure (hPa)")

    canvas = FigureCanvasTkAgg(fig, master=frame_left)
    canvas.draw()
    canvas.get_tk_widget().pack(anchor=tk.NW)  # side=tk.TOP) #, expand=1),fill=tk.BOTH
    toolbar = NavigationToolbar2Tk(canvas, frame_left)
    toolbar.update()
    canvas._tkcanvas.pack(anchor=tk.NW)  # side=tk.TOP) #, expand=1) fill=tk.BOTH

    def button1Function():
        global timeidx
        global canvas
        timeidx += 1
        Frame1()
        print(timeidx)

    def button2Function():
        global timeidx
        if timeidx != 0:
            timeidx -= 1
            #openImage()
            Frame1()
        else:
            print("First time step")

    button1 = tk.Button(frame_left, text=">", activebackground="red", bg="white", fg="black", height=35, width=5,
                        command=button1Function)
    button1.pack(side=tk.RIGHT, anchor=tk.NW)  # side=tk.BOTTOM

    button2 = tk.Button(frame_left, text="<", activebackground="red", bg="white", fg="black", height=35, width=5,
                        command=button2Function)
    button2.pack(side=tk.RIGHT, anchor=tk.NW)  # side=tk.BOTTOM,


menubar = tk.Menu(window)
window.config(menu = menubar)
file = tk.Menu(menubar)
menubar.add_cascade(label="File",menu=file)
file.add_command(label="Open",command=openImage)
openImage()
Frame1()
window.mainloop()

在Tkinter中覆盖或清除画布（matplotlib图）

0 个答案: