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A set of Tkinter widgets to display readonly text and code.

Project description

A set of Tkinter widgets for displaying readonly text and code.

Getting Started

tkReadOnly can be installed from PyPI:

pip install tkreadonly

ReadOnlyText

An extension of the ttk.Text widget that disables all user editing.

The builtin ttk.Text widget doesn’t have a “readonly” mode. You can disable the widget, but this also disables selection and other mouse events, and it changes the color scheme of the text.

This widget captures and discards all insertion and deletion events on the Text widget. This allows the widget to look and behave like a normal ttk.Text widget in all other regards.

Arguments

ReadOnlyText takes the same arguments as the base ttk.Text widget.

Usage

Usage of ReadOnlyText is the same as usage for the base ttk.Text widget.

Example:

from Tkinter import *

from tkreadonly import ReadOnlyText

# Create the main Tk window
root = Tk()

# Create a main frame
main_frame = Frame(root)
main_frame.grid(column=0, row=0, sticky=(N, S, E, W))

# Put a ReadOnlyText widget in the main frame
read_only = ReadOnlyText(main_frame)
read_only.grid(column=0, row=0, sticky=(N, S, E, W))

# Add text to the end of the widget.
read_only.insert(END, 'Hello world')

# Run the main loop
root.mainloop()

ReadOnlyCode

A composite widget that lets you display line number-annotated code, with a vertical scrollbar. The syntax highlighting will be automatically guessed from the filename and/or file contents.

Arguments

style

The Pygments style sheet to use. Default is monokai.

Attributes

filename

The filename currently being displayed. If you set this attribute, the path you provide will be loaded into the code window.

line

The current line of the file. The current line will be highlighted. If you set this attribute, any existing current line will be cleared and the new line highlighted.

Methods

refresh()

Force a reload of the current file.

line_bind(sequence, func)

Bind the func event handler to the given event sequence on a line number. If an binding for the given sequence already exists, it will be overwritten.

Supports <Button-1>-<Button-5>, and <Double-1>-<Double-5> sequences, with the Shift, Alt, and Control modifiers.

When an event occurs, the handler will be invoked with a single argument - the event that occurred. This event object will have a line attribute that describes the line that generated the event.

name_bind(sequence, func)

Bind func event handler to the given event sequence on a token in the code. If an binding for the given sequence already exists, it will be overwritten.

Supports <Button-1>-<Button-5>, and <Double-1>-<Double-5> sequences, with the Shift, Alt, and Control modifiers.

When an event occurs, the handler will be invoked with a single argument - the event that occurred. This event object will have a name attribute that describes the token that generated the event.

Usage

Example:

from Tkinter import *
import tkMessageBox

from tkreadonly import ReadOnlyCode

# Create the main Tk window
root = Tk()

# Create the main frame
main_frame = Frame(root)
main_frame.grid(column=0, row=0, sticky=(N, S, E, W))

# Create a ReadOnlyCode widget in the main frame
read_only = ReadOnlyCode(main_frame)
read_only.grid(column=0, row=0, sticky=(N, S, E, W))

# Show a particular file
read_only.filename = '/path/to/file.py'

# Highlight a particular line in the file
read_only.line = 5

# Set up a handler for a double click on a line number
def line_handler(event):
    tkMessageBox.showinfo(message='Click on line %s' % event.line)

read_only.line_bind('<Double-1>', line_handler)

# Set up a handler for a single click on a code variable
def name_handler(event):
    tkMessageBox.showinfo(message='Click on token %s' % event.name)

read_only.name_bind('<Button-1>', name_handler)

# Run the main event loop
root.mainloop()

Known problems under Ubuntu

Ubuntu’s packaging of Python omits the idlelib library from it’s base packge. If you’re using Python 2.7 on Ubuntu 13.04, you can install idlelib by running:

$ sudo apt-get install idle-python2.7

For other versions of Python and Ubuntu, you’ll need to adjust this as appropriate.

Problems under Windows

If you’re running Cricket in a virtualenv, you’ll need to set an environment variable so that Cricket can find the TCL graphics library:

$ set TCL_LIBRARY=c:\Python27\tcl\tcl8.5

You’ll need to adjust the exact path to reflect your local Python install. You may find it helpful to put this line in the activate.bat script for your virtual environment so that it is automatically set whenever the virtualenv is activated.

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