Next mystery :
a picture drawn in the canvas c1 is scrollable.
a picture-containing canvas "grided" in the canvas c1 is not.
so why ???
Marion
---------------------------------------------------------------
from tkinter import *
from PIL import *
class Main:
def __init__(self):
## Main window
self.root = Tk()
self.root.grid_rowconfigure(0, weight=1)
self.root.grid_rowconfigure(1, weight=1)
self.root.grid_columnconfigure(0, weight=1)
## datas :
self.PIC=[]
self.ANN=[]
## First canvas (picture)
self.c1 = Canvas(
self.root,
width=500,
height=100,
bd=2,
relief=SUNKEN,
scrollregion=(0, 0, 100, 100))
self.c1.grid(
row=0,rowspan=2,
column=1,
sticky='nswe')
#-------------------------------#
# this is scrollable :
#-------------------------------#
image =Image.new("RGB",(100,100))
dessin = ImageDraw.Draw(image)
dessin.rectangle([(10,10),(50,50)],fill="rgb(255,0,0)")
photo=ImageTk.PhotoImage(image)
item = self.c1.create_image(0,0,anchor=NW,image=photo)
#-------------------------------#
# this is not ! :
#-------------------------------#
canvas=Canvas(self.c1,background="WHITE")
image =Image.new("RGB",(100,100))
dessin = ImageDraw.Draw(image)
dessin.rectangle([(10,10),(50,50)],fill="rgb(255,0,0)")
photo=ImageTk.PhotoImage(image)
item = canvas.create_image(0,0,anchor=NW,image=photo)
canvas.grid()
## Second canvas (annot)
c2 = Canvas(
self.root,
width=500,
height=100,
bd=2,
relief=SUNKEN,
scrollregion=(0, 0, 1000, 1000))
c2.grid(
row=2,rowspan=2,
column=1,
sticky='nswe')
## Special function scroll both canvases horizontally
def xscrollboth(a,*args):
self.c1.xview(a,*args)
c2.xview(a,*args)
## Horizontal scrollbar for both canvases
hScroll = Scrollbar(self.root, orient=HORIZONTAL, command=xscrollboth)
hScroll.grid(
row=4,rowspan=1,
column=1,
sticky='we')
## Vertical scrollbars
vScroll1 = Scrollbar(orient=VERTICAL, command=self.c1.yview)
vScroll1.grid(
row=0,rowspan=2,
column=2,
sticky='ns')
self.c1.config(yscrollcommand=vScroll1.set,xscrollcommand=hScroll.set)
vScroll2 = Scrollbar(orient=VERTICAL, command=c2.yview)
vScroll2.grid(
row=2,rowspan=2,
column=2,
sticky='ns')
c2.config(yscrollcommand=vScroll2.set,xscrollcommand=hScroll.set)
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