I am working on a program that 1) Opens images in a folder 2) Complies all those images into a figure 3) inserts the figure into the canvas. My original issue was that in the complied figure, all the pictures were too small to see. So, I wanted to display one picture/section of the figure at a time and scroll down to the next one.
My current issue is that I am unable to insert a scrollbar into the figure/canvas. The error I get is:
scrollbar = Scrollbar(canvas)
AttributeError: 'FigureCanvasTkAgg' object has no attribute 'tk'
I read that scrollbars can only be added to frames, but when I try to add a frame to the canvas I get the same error. My code is as follows:
try:
import Tkinter as tk
except ImportError:
import tkinter as tk
try:
from Tkinter import *
import ttk
except:
from tkinter import ttk
from tkinter import *
from tkinter.ttk import *
import tkMessageBox
import os
import matplotlib
matplotlib.use("TkAgg")
import matplotlib.pyplot as plt
import matplotlib.image as mpimg
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2Tk
from matplotlib.figure import Figure
import numpy as np
LARGE_FONT = ("Verdana", 12)
class Project(tk.Tk):
#Base line code to initialize everything
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
tk.Tk.wm_title(self, "Project")
container = tk.Frame(self) #Define frame/edge of window
container.pack(side="top", fill="both", expand=True) #fill will fill space you have allotted pack. Expand will take up all white space.
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1) #0 sets minimum size weight sets priority
self.frames = {}
for F in [StartPage]:
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(StartPage)
def show_frame(self, cont):
frame = self.frames[cont]
frame.tkraise() #raise to front
class StartPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label = tk.Label(self, text = "Figure Page!", font=LARGE_FONT)
label.pack(pady=10, padx=10)
#add subplot with all images in folder 'PictureFolder'
f = Figure(figsize = (8,8), dpi=100)#define figure
i=1
for picture in os.listdir("/home/pi/Desktop/PictureFolder/"):
a = f.add_subplot(6,1,i) #add subplot RCP. Pth pos on grid with R rows and C columns
img = mpimg.imread("/home/pi/Desktop/PictureFolder/" + picture) #read in image
a.imshow(img) #Renders image
i+=1
#add canvas which is what we intend to render graph to and fill it with figure
canvas = FigureCanvasTkAgg(f, self)
#frame2 = tk.Frame(canvas)
canvas.draw() #raise canvas
canvas.get_tk_widget().pack(side=tk.BOTTOM, fill=tk.X, expand=True) #Fill options: BOTH, X, Y Expand options:
#Add figure toolbar
toolbar = NavigationToolbar2Tk(canvas, self) #add traditionalmatplotlib toolbar
toolbar.update()
canvas._tkcanvas.pack(side=tk.TOP, fill=tk.BOTH, expand=True)
#Add scrollbar
scrollbar = Scrollbar(canvas)
scrollbar.config(command=canvas.yview)
scrollbar.pack(side=RIGHT, fill = Y)
canvas.pack(side=LEFT, expand = YES, fill=BOTH)
canvas.config(yscrollcommand=scrollbar.set)
app = Project()
app.geometry("640x480")
app.mainloop()
mainloop()
