PepMiniiso/pylibraries/ttkbootstrap/scrolled.py

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"""
This module contains various custom scrolling widgets, including
`ScrolledText` and `ScrolledFrame`.
"""
import ttkbootstrap as ttk
from ttkbootstrap.constants import *
from tkinter import Pack, Place, Grid
class ScrolledText(ttk.Frame):
"""A text widget with optional vertical and horizontal scrollbars.
Setting `autohide=True` will cause the scrollbars to hide when the
mouse is not over the widget. The vertical scrollbar is on by
default, but can be turned off. The horizontal scrollbar can be
enabled by setting `vbar=True`.
This widget is identical in configuration to the `Text` widget other
than the scrolling frame. https://tcl.tk/man/tcl8.6/TkCmd/text.htm
![scrolled text](../../../assets/scrolled/scrolledtext.gif)
Examples:
```python
import ttkbootstrap as ttk
from ttkbootstrap.constants import *
from ttkbootstrap.scrolled import ScrolledText
app = ttk.Window()
# scrolled text with autohide vertical scrollbar
st = ScrolledText(app, padding=5, height=10, autohide=True)
st.pack(fill=BOTH, expand=YES)
# add text
st.insert(END, 'Insert your text here.')
app.mainloop()
```
"""
def __init__(
self,
master=None,
padding=2,
bootstyle=DEFAULT,
autohide=False,
vbar=True,
hbar=False,
**kwargs,
):
"""
Parameters:
master (Widget):
The parent widget.
padding (int):
The amount of empty space to create on the outside of
the widget.
bootstyle (str):
A style keyword used to set the color and style of the
vertical scrollbar. Available options include -> primary,
secondary, success, info, warning, danger, dark, light.
vbar (bool):
A vertical scrollbar is shown when **True** (default).
hbar (bool):
A horizontal scrollbar is shown when **True**. Turning
on this scrollbar will also set `wrap="none"`. This
scrollbar is _off_ by default.
autohide (bool):
When **True**, the scrollbars will hide when the mouse
is not within the frame bbox.
**kwargs (Dict[str, Any]):
Other keyword arguments passed to the `Text` widget.
"""
super().__init__(master, padding=padding)
# setup text widget
self._text = ttk.Text(self, padx=50, **kwargs)
self._hbar = None
self._vbar = None
# delegate text methods to frame
for method in vars(ttk.Text).keys():
if any(["pack" in method, "grid" in method, "place" in method]):
pass
else:
setattr(self, method, getattr(self._text, method))
# setup scrollbars
if vbar:
self._vbar = ttk.Scrollbar(
master=self,
bootstyle=bootstyle,
command=self._text.yview,
orient=VERTICAL,
)
self._vbar.place(relx=1.0, relheight=1.0, anchor=NE)
self._text.configure(yscrollcommand=self._vbar.set)
if hbar:
self._hbar = ttk.Scrollbar(
master=self,
bootstyle=bootstyle,
command=self._text.xview,
orient=HORIZONTAL,
)
self._hbar.place(rely=1.0, relwidth=1.0, anchor=SW)
self._text.configure(xscrollcommand=self._hbar.set, wrap="none")
self._text.pack(side=LEFT, fill=BOTH, expand=YES)
# position scrollbars
if self._hbar:
self.update_idletasks()
self._text_width = self.winfo_reqwidth()
self._scroll_width = self.winfo_reqwidth()
self.bind("<Configure>", self._on_configure)
if autohide:
self.autohide_scrollbar()
self.hide_scrollbars()
def _on_configure(self, *_):
"""Callback for when the configure method is used"""
if self._hbar:
self.update_idletasks()
text_width = self.winfo_width()
vbar_width = self._vbar.winfo_width()
relx = (text_width - vbar_width) / text_width
self._hbar.place(rely=1.0, relwidth=relx)
@property
def text(self):
"""Returns the internal text object"""
return self._text
@property
def hbar(self):
"""Returns the internal horizontal scrollbar"""
return self._hbar
@property
def vbar(self):
"""Returns the internal vertical scrollbar"""
return self._vbar
def hide_scrollbars(self, *_):
"""Hide the scrollbars."""
try:
self._vbar.lower(self._text)
except:
pass
try:
self._hbar.lower(self._text)
except:
pass
def show_scrollbars(self, *_):
"""Show the scrollbars."""
try:
self._vbar.lift(self._text)
except:
pass
try:
self._hbar.lift(self._text)
except:
pass
def autohide_scrollbar(self, *_):
"""Show the scrollbars when the mouse enters the widget frame,
and hide when it leaves the frame."""
self.bind("<Enter>", self.show_scrollbars)
self.bind("<Leave>", self.hide_scrollbars)
class ScrolledFrame(ttk.Frame):
"""A widget container with a vertical scrollbar.
The ScrolledFrame fills the width of its container. The height is
either set explicitly or is determined by the content frame's
contents.
This widget behaves mostly like a normal frame other than the
exceptions stated already. Another exception is when packing it
into a Notebook or Panedwindow. In this case, you'll need to add
the container instead of the content frame. For example,
`mynotebook.add(myscrolledframe.container)`.
The scrollbar has an autohide feature that can be turned on by
setting `autohide=True`.
Examples:
```python
import ttkbootstrap as ttk
from ttkbootstrap.constants import *
from ttkbootstrap.scrolled import ScrolledFrame
app = ttk.Window()
sf = ScrolledFrame(app, autohide=True)
sf.pack(fill=BOTH, expand=YES, padx=10, pady=10)
# add a large number of checkbuttons into the scrolled frame
for x in range(20):
ttk.Checkbutton(sf, text=f"Checkbutton {x}").pack(anchor=W)
app.mainloop()
```"""
def __init__(
self,
master=None,
padding=2,
bootstyle=DEFAULT,
autohide=False,
height=200,
width=300,
scrollheight=None,
**kwargs,
):
"""
Parameters:
master (Widget):
The parent widget.
padding (int):
The amount of empty space to create on the outside of
the widget.
bootstyle (str):
A style keyword used to set the color and style of the
vertical scrollbar. Available options include -> primary,
secondary, success, info, warning, danger, dark, light.
autohide (bool):
When **True**, the scrollbars will hide when the mouse
is not within the frame bbox.
height (int):
The height of the container frame in screen units.
width (int):
The width of the container frame in screen units.
scrollheight (int):
The height of the content frame in screen units. If None,
the height is determined by the frame contents.
**kwargs (Dict[str, Any]):
Other keyword arguments passed to the content frame.
"""
# content frame container
self.container = ttk.Frame(
master=master,
relief=FLAT,
borderwidth=0,
width=width,
height=height,
)
self.container.bind("<Configure>", lambda _: self.yview())
self.container.propagate(0)
# content frame
super().__init__(
master=self.container,
padding=padding,
bootstyle=bootstyle.replace('round', ''),
width=width,
height=height,
**kwargs,
)
self.place(rely=0.0, relwidth=1.0, height=scrollheight)
# vertical scrollbar
self.vscroll = ttk.Scrollbar(
master=self.container,
command=self.yview,
orient=VERTICAL,
bootstyle=bootstyle,
)
self.vscroll.pack(side=RIGHT, fill=Y)
self.winsys = self.tk.call("tk", "windowingsystem")
# setup autohide scrollbar
self.autohide = autohide
if self.autohide:
self.hide_scrollbars()
# widget event binding
self.container.bind("<Enter>", self._on_enter, "+")
self.container.bind("<Leave>", self._on_leave, "+")
self.container.bind("<Map>", self._on_map, "+")
self.bind("<<MapChild>>", self._on_map_child, "+")
# delegate content geometry methods to container frame
_methods = vars(Pack).keys() | vars(Grid).keys() | vars(Place).keys()
for method in _methods:
if any(["pack" in method, "grid" in method, "place" in method]):
# prefix content frame methods with 'content_'
setattr(self, f"content_{method}", getattr(self, method))
# overwrite content frame methods from container frame
setattr(self, method, getattr(self.container, method))
def yview(self, *args):
"""Update the vertical position of the content frame within the
container.
Parameters:
*args (List[Any, ...]):
Optional arguments passed to yview in order to move the
content frame within the container frame.
"""
if not args:
first, _ = self.vscroll.get()
self.yview_moveto(fraction=first)
elif args[0] == "moveto":
self.yview_moveto(fraction=float(args[1]))
elif args[0] == "scroll":
self.yview_scroll(number=int(args[1]), what=args[2])
else:
return
def yview_moveto(self, fraction: float):
"""Update the vertical position of the content frame within the
container.
Parameters:
fraction (float):
The relative position of the content frame within the
container.
"""
base, thumb = self._measures()
if fraction < 0:
first = 0.0
elif (fraction + thumb) > 1:
first = 1 - thumb
else:
first = fraction
self.vscroll.set(first, first + thumb)
self.content_place(rely=-first * base)
def yview_scroll(self, number: int, what: str):
"""Update the vertical position of the content frame within the
container.
Parameters:
number (int):
The amount by which the content frame will be moved
within the container frame by 'what' units.
what (str):
The type of units by which the number is to be interpeted.
This parameter is currently not used and is assumed to be
'units'.
"""
first, _ = self.vscroll.get()
fraction = (number / 100) + first
self.yview_moveto(fraction)
def _add_scroll_binding(self, parent):
"""Recursive adding of scroll binding to all descendants."""
children = parent.winfo_children()
for widget in [parent, *children]:
bindings = widget.bind()
if self.winsys.lower() == "x11":
if "<Button-4>" in bindings or "<Button-5>" in bindings:
continue
else:
widget.bind("<Button-4>", self._on_mousewheel, "+")
widget.bind("<Button-5>", self._on_mousewheel, "+")
else:
if "<MouseWheel>" not in bindings:
widget.bind("<MouseWheel>", self._on_mousewheel, "+")
if widget.winfo_children() and widget != parent:
self._add_scroll_binding(widget)
def _del_scroll_binding(self, parent):
"""Recursive removal of scrolling binding for all descendants"""
children = parent.winfo_children()
for widget in [parent, *children]:
if self.winsys.lower() == "x11":
widget.unbind("<Button-4>")
widget.unbind("<Button-5>")
else:
widget.unbind("<MouseWheel>")
if widget.winfo_children() and widget != parent:
self._del_scroll_binding(widget)
def enable_scrolling(self):
"""Enable mousewheel scrolling on the frame and all of its
children."""
self._add_scroll_binding(self)
def disable_scrolling(self):
"""Disable mousewheel scrolling on the frame and all of its
children."""
self._del_scroll_binding(self)
def hide_scrollbars(self):
"""Hide the scrollbars."""
self.vscroll.pack_forget()
def show_scrollbars(self):
"""Show the scrollbars."""
self.vscroll.pack(side=RIGHT, fill=Y)
def autohide_scrollbar(self):
"""Toggle the autohide funtionality. Show the scrollbars when
the mouse enters the widget frame, and hide when it leaves the
frame."""
self.autohide = not self.autohide
def _measures(self):
"""Measure the base size of the container and the thumb size
for use in the yview methods"""
outer = self.container.winfo_height()
inner = max([self.winfo_height(), outer])
base = inner / outer
if inner == outer:
thumb = 1.0
else:
thumb = outer / inner
return base, thumb
def _on_map_child(self, event):
"""Callback for when a widget is mapped to the content frame."""
if self.container.winfo_ismapped():
self.yview()
def _on_enter(self, event):
"""Callback for when the mouse enters the widget."""
self.enable_scrolling()
if self.autohide:
self.show_scrollbars()
def _on_leave(self, event):
"""Callback for when the mouse leaves the widget."""
self.disable_scrolling()
if self.autohide:
self.hide_scrollbars()
def _on_configure(self, event):
"""Callback for when the widget is configured"""
self.yview()
def _on_map(self, event):
self.yview()
def _on_mousewheel(self, event):
"""Callback for when the mouse wheel is scrolled."""
if self.winsys.lower() == "win32":
delta = -int(event.delta / 120)
elif self.winsys.lower() == "aqua":
delta = -event.delta
elif event.num == 4:
delta = -10
elif event.num == 5:
delta = 10
self.yview_scroll(delta, UNITS)