更新 tkinter 中嵌入的 matplotlib 图的颜色答案

【问题标题】：Updating the color of embeded matplotlib plot in tkinter更新 tkinter 中嵌入的 matplotlib 图的颜色
【发布时间】：2019-10-18 05:56:40
【问题描述】：

我尝试在 tkinter 中为嵌入式 matplotlib 绘图添加一些选项。绘图样式（即实线或虚线）正确更改，但颜色没有。但是，通过调整 tkinter 窗口的大小，颜色得到了更新。我的代码的相关部分如下所示：

import tkinter as tk
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
from matplotlib.figure import Figure
from tkinter.colorchooser import askcolor
import numpy as np



class Ploter:
    DEFAULT_PEN_SIZE = 5.0
    DEFAULT_COLOR = 'black'
    DEFAULT_STYLE = '-'
    def __init__(self, master, size = (5,4), dpi = 100):
        self.master = master
        self.size = size
        self.dpi = dpi
        self.color = self.DEFAULT_COLOR
        self.style = self.DEFAULT_STYLE
        self.fig = Figure(figsize = self.size, dpi=self.dpi)
        self.canvas = FigureCanvasTkAgg(self.fig , master=self.master)
        self.ax = self.fig.add_subplot(111)
        self.t = np.arange(0, 3, 0.01)
        self.tf = 2 * np.sin(2 * np.pi * self.t)

    def PlotWidgets(self):

        toolbar = NavigationToolbar2TkAgg(self.canvas, self.master)
        toolbar.update()
        self.canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=1)



        list1 = ["Solid", "Dashed", "Dash-dot", 'Dotted'] 
        self.line_style = tk.StringVar()
        self.line_style.set('Line Style')
        self.line_style.trace("w", self.choose_style)
        droplist = tk.OptionMenu(self.master, self.line_style, *list1)
        droplist.config(width=10)
        droplist.pack(side = tk.LEFT , padx = 10 , pady = 10)

        color_button = tk.Button(master = self.master, text='color',
                                 command = self.choose_color)
        color_button.pack(side = tk.LEFT , padx = 10 , pady = 10)

        self.ploter()

    def ploter(self):
        self.ax.clear()
        style = self.style
        self.ax.plot(self.t, self.tf, style , color = self.color)
        self.canvas.draw()


    def choose_color(self):
        style = self.style
        self.color = askcolor(color=self.color)[1]
        self.ax.plot(self.t, self.tf, style , color = self.color)
        #self.canvas.draw()
    def choose_style(self, * args):
        if self.line_style.get() == "Solid":
            self.style = '-'
            self.ploter()
        if self.line_style.get() == "Dashed":
            self.style = '--'
            self.ploter()
        if self.line_style.get() == "Dash-dot":
            self.style = '-.'
            self.ploter()
        if self.line_style.get() == "Dotted":
            self.style = ':'
            self.ploter()




root = tk.Tk()
root.wm_title("Embedding in tkinter")
pp = Ploter(root)
pp.PlotWidgets()
root.mainloop()

我尝试过重启电脑、不同的 IDE 或从终端运行脚本，但都没有解决问题。

值得一提的是，我使用的是 Linux mint 19.2（MATE 桌面，x11 显示服务器），python 3.6.8，matplotlib 2.1.1，tkinter 8.6。

【问题讨论】：

标签： python matplotlib tkinter

【解决方案1】：

将canvas.draw_idle() 添加到您的ploter 和choose_color 函数中：

def ploter(self):
    self.ax.clear()
    style = self.style
    self.ax.plot(self.t, self.tf, style , color = self.color)
    self.canvas.draw_idle()

def choose_color(self):
    style = self.style
    self.color = askcolor(color=self.color)[1]
    self.ax.plot(self.t, self.tf, style , color = self.color)
    self.canvas.draw_idle()

【讨论】：