class ScrolledFrame(Frame):
def __init__(self,
parent,
xscroll=True,
yscroll=True,
width=500,
height=500,
doExtraConfig=True,
tipText=None,
*args,
**kw):
Frame.__init__(self, parent, *args, **kw)
self.grid_rowconfigure(0, weight=1)
self.grid_columnconfigure(0, weight=1)
self.doExtraConfig = doExtraConfig
self.xscroll = xscroll
self.yscroll = yscroll
self.canvas = Tkinter.Canvas(self,
borderwidth=0,
bg=self.cget('bg'),
highlightthickness=0,
width=25,
height=25)
self.canvas.grid(row=0, column=0, sticky=Tkinter.NSEW)
if (xscroll):
self.xscrollbar = Tkinter.Scrollbar(self,
orient=Tkinter.HORIZONTAL,
borderwidth=1)
self.xscrollbar.config(command=self.canvas.xview)
self.canvas.config(xscrollcommand=self.xscrollbar.set)
if (yscroll):
self.yscrollbar = Tkinter.Scrollbar(self,
orient=Tkinter.VERTICAL,
borderwidth=1)
self.yscrollbar.config(command=self.canvas.yview)
self.canvas.config(yscrollcommand=self.yscrollbar.set)
# reset the view (always do this if you don't use scrollbars)
self.canvas.xview('moveto', 0)
self.canvas.yview('moveto', 0)
# create the frame
self.frame = Frame(self.canvas, tipText=tipText)
self.frame.grid(row=0, column=0, sticky=Tkinter.NSEW)
self.frame.grid_rowconfigure(0, weight=1)
self.frame.grid_columnconfigure(0, weight=1)
self.waiting = 0
# track changes to its size
self.bind('<Configure>', self.configureCanvasAfter)
# track changes to its contents
self.frame.bind('<Configure>', self.configureFrame)
# place the frame inside the canvas (this also
# runs the __configure method)
self.canvas.create_window(0, 0, window=self.frame, anchor='nw')
#self.frameWidth = self.frame.winfo_reqwidth()
#self.frameHeight = self.frame.winfo_reqheight()
self.frameWidth = 0
self.frameHeight = 0
def configureFrame(self, event):
# frame contents have changed size, but make no change to displayed canvas size
if (event.width != self.frameWidth) or (event.height !=
self.frameHeight):
# the size of the frame with widgets in the 'background'
self.frameWidth = event.width
self.frameHeight = event.height
# the scrolled region is always the entire frame
self.canvas.config(scrollregion="0 0 %s %s" %
(self.frameWidth, self.frameHeight))
self.configureCanvasAfter()
def configureCanvasAfter(self, event=None):
if self.waiting:
return
else:
self.waiting = 1
self.after_idle(lambda: self.configureCanvas(event))
def configureCanvas(self, event=None):
d = 2 * int(self.cget('borderwidth'))
if (event):
# the canvas visible display size updates with the rezize event unless the axis is not scrolled
canvasWidth = event.width - d
canvasHeight = event.height - d
else:
# if no resize event the canvas size is unaltered
canvasWidth = int(self.winfo_width()) - d
canvasHeight = int(self.winfo_height()) - d
if self.xscroll:
if (self.frameWidth > 1):
if (self.frameWidth > canvasWidth):
self.xscrollbar.grid(row=1, column=0, sticky=Tkinter.EW)
else:
self.xscrollbar.grid_forget()
else:
self.xscrollbar.grid(row=1, column=0, sticky=Tkinter.EW)
else:
# display full width
canvasWidth = self.frameWidth
if self.yscroll:
if (self.frameHeight > 1):
if (self.frameHeight > canvasHeight):
self.yscrollbar.grid(row=0, column=1, sticky=Tkinter.NS)
else:
self.yscrollbar.grid_forget()
else:
self.yscrollbar.grid(row=0, column=1, sticky=Tkinter.NS)
else:
# display full height
canvasHeight = self.frameHeight
if (self.doExtraConfig):
# sometimes below seems to be needed and sometimes not
# seems to depend on what else is there in widget besides scrolled frame
# can sometimes wildly iterate if below is done
self.canvas.config(width=canvasWidth, height=canvasHeight)
self.waiting = 0
import Util
def config1(event):
print 'config1:', frame.winfo_width(), frame.winfo_height()
def config2(event):
print 'config2:', frame2.winfo_width(), frame2.winfo_height()
root = Tkinter.Tk()
frame = ScrolledFrame(root)
#frame = ScrolledFrame(root, xscroll=false)
# below must be pack not grid in order for expansion to work
frame.pack(side=Tkinter.TOP, expand=Tkinter.YES, fill=Tkinter.BOTH)
frame.bind('<Configure>', config1)
frame2 = Frame(frame.frame)
frame2.bind('<Configure>', config2)
for i in range(30):
t = 'a very long label %s' % i
label = Tkinter.Label(frame2, text=t)
label.grid(sticky=Tkinter.NSEW)
frame2.grid(sticky=Tkinter.NSEW)
button = Util.createQuitButton(root)
button.pack()
root.mainloop()
