使用python和matplotlib繪製圖形問題

Question

我正在製作應用程序，繪製一些圖形經過一些處理後。這是在用戶引入了一些值並按下一個按鈕之後完成的。但是我沒有得到這張圖。下面有一個簡化的代碼。如果我直接繪製t和s的值，但是如果在按下按鈕後完成的話，這種方法可以正常工作。我錯過了什麼？還有其他更好的方法嗎？

from numpy import arange, sin, pi 
import matplotlib 
matplotlib.use('WXAgg') 

from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas 
from matplotlib.backends.backend_wx import NavigationToolbar2Wx 
from matplotlib.figure import Figure 

import wx 

class Input_Panel(wx.Panel): 
    def __init__(self, parent): 
     wx.Panel.__init__(self, parent) 
     # Input variables 
     self.button = wx.Button(self, label="Go") 

     # Set sizer for the panel content 
     self.sizer = wx.GridBagSizer(1, 1) 
     self.sizer.Add(self.button, (1, 2), (3, 6), flag=wx.EXPAND) 
     self.SetSizer(self.sizer) 

class Output_Panel_Var(wx.Panel): 
    def __init__(self, parent): 
     wx.Panel.__init__(self, parent) 
     # Output variables 
     self.tittle = wx.StaticText(self, label="OUTPUTS:") 
     self.font = wx.Font(12, wx.DECORATIVE, wx.BOLD, wx.NORMAL) 
     self.tittle.SetFont(self.font) 
     self.lblt = wx.StaticText(self, label="t:") 
     self.resultt = wx.StaticText(self, label="", size=(100, -1)) 
     self.lbls = wx.StaticText(self, label="s:") 
     self.results = wx.StaticText(self, label="", size=(100, -1)) 

     # Set sizer for the panel content 
     self.sizer = wx.GridBagSizer(2, 2) 
     self.sizer.Add(self.tittle, (1, 3)) 
     self.sizer.Add(self.lblt, (3, 1)) 
     self.sizer.Add(self.resultt, (3, 2)) 
     self.sizer.Add(self.lbls, (4, 1)) 
     self.sizer.Add(self.results, (4, 2)) 
     self.SetSizer(self.sizer) 

class Output_Panel_Fig(wx.Panel): 
    def __init__(self, parent): 
     wx.Panel.__init__(self, parent) 
     self.figure = Figure() 
     self.axes = self.figure.add_subplot(111) 
     self.canvas = FigureCanvas(self, -1, self.figure) 
     self.sizer = wx.BoxSizer(wx.VERTICAL) 
     self.sizer.Add(self.canvas, 1, wx.LEFT | wx.TOP | wx.GROW) 
     self.SetSizer(self.sizer) 

    def draw(self,t,s): 
     self.axes.plot(t, s) 


class Main_Window(wx.Frame): 
    def __init__(self, parent, title): 
     wx.Frame.__init__(self, parent, title = title, pos = (0, 0), size = wx.DisplaySize()) 

     # Set variable panels 
     self.main_splitter = wx.SplitterWindow(self) 
     self.out_splitter = wx.SplitterWindow(self.main_splitter) 
     self.inputpanel = Input_Panel(self.main_splitter) 
     self.inputpanel.SetBackgroundColour('#c4c4ff') 
     self.outputpanelvar = Output_Panel_Var(self.out_splitter) 
     self.outputpanelvar.SetBackgroundColour('#c2f1f5') 
     self.outputpanelfig = Output_Panel_Fig(self.out_splitter) 
     self.main_splitter.SplitVertically(self.inputpanel, self.out_splitter) 
     self.out_splitter.SplitHorizontally(self.outputpanelvar, self.outputpanelfig) 

     # Set event handlers 
     self.inputpanel.button.Bind(wx.EVT_BUTTON, self.OnButton)  

    def OnButton(self, e): 
     t = arange(0.0, 1.0, 0.01) 
     s = sin(2 * pi * t) 
     #self.outputpanelvar.resultt.SetLabel('%.5f' % t) 
     #self.outputpanelvar.resultt.SetLabel('%.5f' % s) 
     self.outputpanelfig.draw(t,s) 

def main(): 
    app = wx.App(False) 
    frame = Main_Window(None, "T-Matrix Codes GUI") 
    frame.Show() 
    app.MainLoop() 
if __name__ == "__main__" : 
    main() 

Answer 1

我想你錯過了畫布的重繪。做一個新的繪圖是不夠的，但必須刷新繪圖窗格！在Output_Panel_Fig的draw方法中的plot命令之後添加一個self.canvas.draw（），這應該有所幫助。

import ... 

class Input_Panel(wx.Panel): 
    def __init__(self, parent): 
     ... 

class Output_Panel_Var(wx.Panel): 
    def __init__(self, parent): 
     ... 

class Output_Panel_Fig(wx.Panel): 
    def __init__(self, parent): 
     ... 

    def draw(self,t,s): 
     self.axes.plot(t, s) 

     self.canvas.draw() 


class Main_Window(wx.Frame): 
    def __init__(self, parent, title): 
     ... 

    def OnButton(self, e): 
     ... 

def main(): 
    ... 

if __name__ == "__main__" : 
    main()