You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
194 lines
6.7 KiB
194 lines
6.7 KiB
2 years ago
|
"""Simple text browser for IDLE
|
||
|
|
|
||
|
|
"""
|
||
|
|
from tkinter import Toplevel, Text, TclError,\
|
||
|
|
HORIZONTAL, VERTICAL, NS, EW, NSEW, NONE, WORD, SUNKEN
|
||
|
|
from tkinter.ttk import Frame, Scrollbar, Button
|
||
|
|
from tkinter.messagebox import showerror
|
||
|
|
|
||
|
|
from idlelib.colorizer import color_config
|
||
|
|
|
||
|
|
|
||
|
|
class AutoHideScrollbar(Scrollbar):
|
||
|
|
"""A scrollbar that is automatically hidden when not needed.
|
||
|
|
|
||
|
|
Only the grid geometry manager is supported.
|
||
|
|
"""
|
||
|
|
def set(self, lo, hi):
|
||
|
|
if float(lo) > 0.0 or float(hi) < 1.0:
|
||
|
|
self.grid()
|
||
|
|
else:
|
||
|
|
self.grid_remove()
|
||
|
|
super().set(lo, hi)
|
||
|
|
|
||
|
|
def pack(self, **kwargs):
|
||
|
|
raise TclError(f'{self.__class__.__name__} does not support "pack"')
|
||
|
|
|
||
|
|
def place(self, **kwargs):
|
||
|
|
raise TclError(f'{self.__class__.__name__} does not support "place"')
|
||
|
|
|
||
|
|
|
||
|
|
class ScrollableTextFrame(Frame):
|
||
|
|
"""Display text with scrollbar(s)."""
|
||
|
|
|
||
|
|
def __init__(self, master, wrap=NONE, **kwargs):
|
||
|
|
"""Create a frame for Textview.
|
||
|
|
|
||
|
|
master - master widget for this frame
|
||
|
|
wrap - type of text wrapping to use ('word', 'char' or 'none')
|
||
|
|
|
||
|
|
All parameters except for 'wrap' are passed to Frame.__init__().
|
||
|
|
|
||
|
|
The Text widget is accessible via the 'text' attribute.
|
||
|
|
|
||
|
|
Note: Changing the wrapping mode of the text widget after
|
||
|
|
instantiation is not supported.
|
||
|
|
"""
|
||
|
|
super().__init__(master, **kwargs)
|
||
|
|
|
||
|
|
text = self.text = Text(self, wrap=wrap)
|
||
|
|
text.grid(row=0, column=0, sticky=NSEW)
|
||
|
|
self.grid_rowconfigure(0, weight=1)
|
||
|
|
self.grid_columnconfigure(0, weight=1)
|
||
|
|
|
||
|
|
# vertical scrollbar
|
||
|
|
self.yscroll = AutoHideScrollbar(self, orient=VERTICAL,
|
||
|
|
takefocus=False,
|
||
|
|
command=text.yview)
|
||
|
|
self.yscroll.grid(row=0, column=1, sticky=NS)
|
||
|
|
text['yscrollcommand'] = self.yscroll.set
|
||
|
|
|
||
|
|
# horizontal scrollbar - only when wrap is set to NONE
|
||
|
|
if wrap == NONE:
|
||
|
|
self.xscroll = AutoHideScrollbar(self, orient=HORIZONTAL,
|
||
|
|
takefocus=False,
|
||
|
|
command=text.xview)
|
||
|
|
self.xscroll.grid(row=1, column=0, sticky=EW)
|
||
|
|
text['xscrollcommand'] = self.xscroll.set
|
||
|
|
else:
|
||
|
|
self.xscroll = None
|
||
|
|
|
||
|
|
|
||
|
|
class ViewFrame(Frame):
|
||
|
|
"Display TextFrame and Close button."
|
||
|
|
def __init__(self, parent, contents, wrap='word'):
|
||
|
|
"""Create a frame for viewing text with a "Close" button.
|
||
|
|
|
||
|
|
parent - parent widget for this frame
|
||
|
|
contents - text to display
|
||
|
|
wrap - type of text wrapping to use ('word', 'char' or 'none')
|
||
|
|
|
||
|
|
The Text widget is accessible via the 'text' attribute.
|
||
|
|
"""
|
||
|
|
super().__init__(parent)
|
||
|
|
self.parent = parent
|
||
|
|
self.bind('<Return>', self.ok)
|
||
|
|
self.bind('<Escape>', self.ok)
|
||
|
|
self.textframe = ScrollableTextFrame(self, relief=SUNKEN, height=700)
|
||
|
|
|
||
|
|
text = self.text = self.textframe.text
|
||
|
|
text.insert('1.0', contents)
|
||
|
|
text.configure(wrap=wrap, highlightthickness=0, state='disabled')
|
||
|
|
color_config(text)
|
||
|
|
text.focus_set()
|
||
|
|
|
||
|
|
self.button_ok = button_ok = Button(
|
||
|
|
self, text='Close', command=self.ok, takefocus=False)
|
||
|
|
self.textframe.pack(side='top', expand=True, fill='both')
|
||
|
|
button_ok.pack(side='bottom')
|
||
|
|
|
||
|
|
def ok(self, event=None):
|
||
|
|
"""Dismiss text viewer dialog."""
|
||
|
|
self.parent.destroy()
|
||
|
|
|
||
|
|
|
||
|
|
class ViewWindow(Toplevel):
|
||
|
|
"A simple text viewer dialog for IDLE."
|
||
|
|
|
||
|
|
def __init__(self, parent, title, contents, modal=True, wrap=WORD,
|
||
|
|
*, _htest=False, _utest=False):
|
||
|
|
"""Show the given text in a scrollable window with a 'close' button.
|
||
|
|
|
||
|
|
If modal is left True, users cannot interact with other windows
|
||
|
|
until the textview window is closed.
|
||
|
|
|
||
|
|
parent - parent of this dialog
|
||
|
|
title - string which is title of popup dialog
|
||
|
|
contents - text to display in dialog
|
||
|
|
wrap - type of text wrapping to use ('word', 'char' or 'none')
|
||
|
|
_htest - bool; change box location when running htest.
|
||
|
|
_utest - bool; don't wait_window when running unittest.
|
||
|
|
"""
|
||
|
|
super().__init__(parent)
|
||
|
|
self['borderwidth'] = 5
|
||
|
|
# Place dialog below parent if running htest.
|
||
|
|
x = parent.winfo_rootx() + 10
|
||
|
|
y = parent.winfo_rooty() + (10 if not _htest else 100)
|
||
|
|
self.geometry(f'=750x500+{x}+{y}')
|
||
|
|
|
||
|
|
self.title(title)
|
||
|
|
self.viewframe = ViewFrame(self, contents, wrap=wrap)
|
||
|
|
self.protocol("WM_DELETE_WINDOW", self.ok)
|
||
|
|
self.button_ok = button_ok = Button(self, text='Close',
|
||
|
|
command=self.ok, takefocus=False)
|
||
|
|
self.viewframe.pack(side='top', expand=True, fill='both')
|
||
|
|
|
||
|
|
self.is_modal = modal
|
||
|
|
if self.is_modal:
|
||
|
|
self.transient(parent)
|
||
|
|
self.grab_set()
|
||
|
|
if not _utest:
|
||
|
|
self.wait_window()
|
||
|
|
|
||
|
|
def ok(self, event=None):
|
||
|
|
"""Dismiss text viewer dialog."""
|
||
|
|
if self.is_modal:
|
||
|
|
self.grab_release()
|
||
|
|
self.destroy()
|
||
|
|
|
||
|
|
|
||
|
|
def view_text(parent, title, contents, modal=True, wrap='word', _utest=False):
|
||
|
|
"""Create text viewer for given text.
|
||
|
|
|
||
|
|
parent - parent of this dialog
|
||
|
|
title - string which is the title of popup dialog
|
||
|
|
contents - text to display in this dialog
|
||
|
|
wrap - type of text wrapping to use ('word', 'char' or 'none')
|
||
|
|
modal - controls if users can interact with other windows while this
|
||
|
|
dialog is displayed
|
||
|
|
_utest - bool; controls wait_window on unittest
|
||
|
|
"""
|
||
|
|
return ViewWindow(parent, title, contents, modal, wrap=wrap, _utest=_utest)
|
||
|
|
|
||
|
|
|
||
|
|
def view_file(parent, title, filename, encoding, modal=True, wrap='word',
|
||
|
|
_utest=False):
|
||
|
|
"""Create text viewer for text in filename.
|
||
|
|
|
||
|
|
Return error message if file cannot be read. Otherwise calls view_text
|
||
|
|
with contents of the file.
|
||
|
|
"""
|
||
|
|
try:
|
||
|
|
with open(filename, 'r', encoding=encoding) as file:
|
||
|
|
contents = file.read()
|
||
|
|
except OSError:
|
||
|
|
showerror(title='File Load Error',
|
||
|
|
message=f'Unable to load file {filename!r} .',
|
||
|
|
parent=parent)
|
||
|
|
except UnicodeDecodeError as err:
|
||
|
|
showerror(title='Unicode Decode Error',
|
||
|
|
message=str(err),
|
||
|
|
parent=parent)
|
||
|
|
else:
|
||
|
|
return view_text(parent, title, contents, modal, wrap=wrap,
|
||
|
|
_utest=_utest)
|
||
|
|
return None
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
from unittest import main
|
||
|
|
main('idlelib.idle_test.test_textview', verbosity=2, exit=False)
|
||
|
|
|
||
|
|
from idlelib.idle_test.htest import run
|
||
|
|
run(ViewWindow)
|