Aligning in wxpython

Question

I am trying to align checkboxes and matplotlib canvas in wx frame.

• I need those check boxes to be aligned in left side and canvas on right side
• below code not aligning them properly

can anybody suggest changes need to be done in the code ?

• If I want to add one more canvas in the same frame how can i add it?

   import wx import matplotlib.pyplot as plt from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas class canvasFrame(wx.Frame): def __init__(self,parent,id): wx.Frame.__init__(self,parent,id,"MyCanvas",size =(1200,400)) self.fig = plt.Figure(figsize=(15,5)) self.ax1 = self.fig.add_subplot(1,1,1) self.canvas = FigureCanvas(self, -1, self.fig) b1 = wx.CheckBox(self,-1,"Apples",(10,20),(160,-1)) b2 = wx.CheckBox(self,-1,"Mango",(10,40),(160,-1)) b1sizer = wx.BoxSizer(wx.VERTICAL) b2sizer = wx.BoxSizer(wx.VERTICAL) canvSizer = wx.BoxSizer(wx.HORIZONTAL) b1sizer.Add(b1,0,wx.ALL,5) b2sizer.Add(b2,0,wx.ALL,5) canvSizer.Add(self.canvas,wx.TOP | wx.EXPAND,5) if __name__ == "__main__": app = wx.App() frame = canvasFrame(parent=None,id = -1) frame.Show() app.MainLoop() 

Answer 1

you are missing alot of parts of how sizers work ... I would really recommend revisiting the documentation and googling for tutorials

class canvasFrame(wx.Frame):
    def __init__(self,parent,id):
        wx.Frame.__init__(self,parent,id,"MyCanvas",size =(1200,400))

        self.fig = plt.Figure(figsize=(15,5))
        self.ax1 = self.fig.add_subplot(1,1,1)
        self.canvas = FigureCanvas(self, -1, self.fig)

        b1 = wx.CheckBox(self,-1,"Apples",(10,20),(160,-1))
        b2 = wx.CheckBox(self,-1,"Mango",(10,40),(160,-1))
        # first create your sizer for your checkboxes
        checkbox_sizer = wx.BoxSizer(wx.VERTICAL)
        checkbox_sizer.AddMany([b1,b2]) # add both buttons to the sizer
        #next create the main sizer
        main_sizer = wx.BoxSizer(wx.HORIZONTAL)
        #add the checkbox sizer to the main_sizer
        main_sizer.Add(checkbox_sizer)
        # add the canvas to the main sizer
        main_sizer.Add(self.canvas)
        #Set the sizer as the sizer for the frame
        self.SetSizer(main_sizer)
        #call layout for the sizers to layout their elements
        self.Layout()
        #call fit to make the frame fit its contents
        self.Fit()

Answer 2

You are using the sizers incorrectly, try the following:

import wx
import matplotlib.pyplot as plt
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas

class canvasFrame(wx.Frame):
    def __init__(self,parent,id):
        wx.Frame.__init__(self,parent,id,"MyCanvas",size =(1200,400))

        self.fig = plt.Figure(figsize=(15,5))
        self.ax1 = self.fig.add_subplot(1,1,1)
        self.canvas = FigureCanvas(self, -1, self.fig)

        b1 = wx.CheckBox(self,-1,"Apples", size=(160,-1))
        b2 = wx.CheckBox(self,-1,"Mango", size=(160,-1))

        mainsizer = wx.BoxSizer(wx.HORIZONTAL) # Main sizer
        cbsizer = wx.BoxSizer(wx.VERTICAL) # Checkbox sizer
        canvassizer = wx.BoxSizer(wx.VERTICAL) # Canvas sizer

        # Add checkbox 
        cbsizer.Add(b1, 0, wx.ALIGN_LEFT|wx.ALL, 5)
        cbsizer.Add(b2, 0, wx.ALIGN_LEFT|wx.ALL, 5)

        # Add canvas
        canvassizer.Add(self.canvas, 1, wx.EXPAND|wx.ALL, 1)

        # Add "secondary" sizers to main sizer
        mainsizer.Add(cbsizer, 1, wx.EXPAND|wx.ALL, 2)
        mainsizer.Add(canvassizer, 3, wx.EXPAND|wx.ALL, 2)

        self.SetSizer(mainsizer)


if __name__ == "__main__":
   app = wx.App()
   frame = canvasFrame(parent=None,id = -1)
   frame.Show()
   app.MainLoop()

Now, about the last question, i think that you would add a subplot (axes) instead other canvas, ie

self.fig = plt.Figure(figsize=(15,5))
self.ax1 = self.fig.add_subplot(1,2,1)
self.ax2 = self.fig.add_subplot(1,2,2)
self.canvas = FigureCanvas(self, -1, self.fig)