153 lines
6.7 KiB
Python
153 lines
6.7 KiB
Python
from tkinter import E, N, NSEW, S, Canvas, Event, ttk
|
|
|
|
from classes.custom.themed_frame import ThemedFrame
|
|
|
|
FIT_WIDTH = "fit_width"
|
|
FIT_HEIGHT = "fit_height"
|
|
|
|
|
|
class ScrollableFrame(ThemedFrame):
|
|
"""
|
|
There is no way to scroll <tkinter.Frame> so we are
|
|
going to create a canvas and place the frame there.
|
|
Scrolling the canvas will give the illusion of scrolling
|
|
the frame
|
|
Partly taken from:
|
|
https://blog.tecladocode.com/tkinter-scrollable-frames/
|
|
https://stackoverflow.com/a/17457843/11106801
|
|
master_frame---------------------------------------------------------
|
|
| dummy_canvas----------------------------------------- y_scroll-- |
|
|
| | self--------------------------------------------- | | | |
|
|
| | | | | | | |
|
|
| | | | | | | |
|
|
| | | | | | | |
|
|
| | ------------------------------------------------ | | | |
|
|
| ---------------------------------------------------- --------- |
|
|
| x_scroll--------------------------------------------- |
|
|
| | | |
|
|
| ---------------------------------------------------- |
|
|
--------------------------------------------------------------------
|
|
"""
|
|
def __init__(self, master=None, scroll_speed:int=2, hscroll:bool=False, vscroll:bool=True, scrollbar_kwargs={}, **kwargs):
|
|
assert isinstance(scroll_speed, int), "`scroll_speed` must be an int"
|
|
self.scroll_speed = scroll_speed
|
|
|
|
self.master_frame = ThemedFrame(master)
|
|
# self.master_frame["borderwidth"] = 1
|
|
# self.master_frame["relief"] = "solid"
|
|
self.master_frame.grid_rowconfigure(0, weight=1)
|
|
self.master_frame.grid_columnconfigure(0, weight=1)
|
|
self.dummy_canvas = Canvas(self.master_frame, highlightthickness=0, **kwargs)
|
|
super().__init__(self.dummy_canvas)
|
|
|
|
# Create the 2 scrollbars
|
|
if vscroll:
|
|
self.v_scrollbar = ttk.Scrollbar(self.master_frame, orient="vertical", command=self.dummy_canvas.yview, **scrollbar_kwargs)
|
|
self.v_scrollbar.grid(row=0, column=1, sticky=N+S+E)
|
|
self.dummy_canvas.configure(yscrollcommand=self.v_scrollbar.set)
|
|
if hscroll:
|
|
self.h_scrollbar = ttk.Scrollbar(self.master_frame, orient="horizontal", command=self.dummy_canvas.xview, **scrollbar_kwargs)
|
|
self.h_scrollbar.grid(row=1, column=0, sticky=NSEW)
|
|
self.dummy_canvas.configure(xscrollcommand=self.h_scrollbar.set)
|
|
|
|
# Bind to the mousewheel scrolling
|
|
self.dummy_canvas.bind_all("<MouseWheel>", self.scrolling_windows, add=True)
|
|
self.dummy_canvas.bind_all("<Button-4>", self.scrolling_linux, add=True)
|
|
self.dummy_canvas.bind_all("<Button-5>", self.scrolling_linux, add=True)
|
|
self.bind("<Configure>", self.scrollbar_scrolling, add=True)
|
|
|
|
# Place `self` inside `dummy_canvas`
|
|
self.dummy_canvas.create_window((0, 0), window=self, anchor="nw")
|
|
# Place `dummy_canvas` inside `master_frame`
|
|
self.dummy_canvas.grid(row=0, column=0, sticky=NSEW)
|
|
|
|
self.pack = self.master_frame.pack
|
|
self.grid = self.master_frame.grid
|
|
self.place = self.master_frame.place
|
|
self.pack_forget = self.master_frame.pack_forget
|
|
self.grid_forget = self.master_frame.grid_forget
|
|
self.place_forget = self.master_frame.place_forget
|
|
|
|
def scrolling_windows(self, event:Event) -> None:
|
|
assert event.delta != 0, "On Windows, `event.delta` should never be 0"
|
|
y_steps = int(-event.delta/abs(event.delta)*self.scroll_speed)
|
|
self.dummy_canvas.yview_scroll(y_steps, "units")
|
|
|
|
def scrolling_linux(self, event:Event) -> None:
|
|
y_steps = self.scroll_speed
|
|
if event.num == 4:
|
|
y_steps *= -1
|
|
self.dummy_canvas.yview_scroll(y_steps, "units")
|
|
|
|
def scrollbar_scrolling(self, event:Event) -> None:
|
|
region = list(self.dummy_canvas.bbox("all"))
|
|
region[2] = max(self.dummy_canvas.winfo_width(), region[2])
|
|
region[3] = max(self.dummy_canvas.winfo_height(), region[3])
|
|
self.dummy_canvas.configure(scrollregion=region)
|
|
|
|
def resize(self, fit:str=None, height:int=None, width:int=None) -> None:
|
|
"""
|
|
Resizes the frame to fit the widgets inside. You must either
|
|
specify (the `fit`) or (the `height` or/and the `width`) parameter.
|
|
Parameters:
|
|
fit:str `fit` can be either `FIT_WIDTH` or `FIT_HEIGHT`.
|
|
`FIT_WIDTH` makes sure that the frame's width can
|
|
fit all of the widgets. `FIT_HEIGHT` is simmilar
|
|
height:int specifies the height of the frame in pixels
|
|
width:int specifies the width of the frame in pixels
|
|
To do:
|
|
ALWAYS_FIT_WIDTH
|
|
ALWAYS_FIT_HEIGHT
|
|
"""
|
|
if height is not None:
|
|
self.dummy_canvas.config(height=height)
|
|
if width is not None:
|
|
self.dummy_canvas.config(width=width)
|
|
if fit == FIT_WIDTH:
|
|
super().update()
|
|
self.dummy_canvas.config(width=super().winfo_width())
|
|
elif fit == FIT_HEIGHT:
|
|
super().update()
|
|
self.dummy_canvas.config(height=super().winfo_height())
|
|
else:
|
|
raise ValueError("Unknow value for the `fit` parameter.")
|
|
fit = resize
|
|
|
|
# import tkinter as tk
|
|
# from tkinter import ttk
|
|
# from classes.custom.themed_frame import ThemedFrame
|
|
|
|
# class ScrollableFrame(ThemedFrame):
|
|
|
|
# def __init__(self, container, *args, **kwargs):
|
|
|
|
# super().__init__(container, *args, **kwargs)
|
|
|
|
# self.canvas = tk.Canvas(self)
|
|
# scrollbar = ttk.Scrollbar(self, orient="vertical", command=self.canvas.yview)
|
|
|
|
# self.canvas.bind_all("<MouseWheel>", self._on_mousewheel)
|
|
|
|
# self.scrollable_frame = ThemedFrame(self.canvas)
|
|
|
|
# self.scrollable_frame.bind(
|
|
# "<Configure>",
|
|
# lambda e: self.canvas.configure(
|
|
# scrollregion=self.canvas.bbox("all")
|
|
# )
|
|
# )
|
|
|
|
# self.canvas.create_window((0, 0), window=self.scrollable_frame, anchor="nw")
|
|
|
|
# self.canvas.configure(yscrollcommand=scrollbar.set)
|
|
|
|
# self.canvas.pack(side="left", fill="both", expand=True)
|
|
# scrollbar.pack(side="right", fill="y")
|
|
|
|
# def _on_mousewheel(self, event):
|
|
# shift = (event.state & 0x1) != 0
|
|
# scroll = -1 if event.delta > 0 else 1
|
|
# if shift:
|
|
# self.canvas.xview_scroll(scroll, "units")
|
|
# else:
|
|
# self.canvas.yview_scroll(scroll, "units") |