forked from robertlugg/easygui
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text_box.py
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text_box.py
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"""
.. moduleauthor:: easygui developers and Stephen Raymond Ferg
.. default-domain:: py
.. highlight:: python
Version |release|
"""
import sys
try:
from . import global_state
except (SystemError, ValueError, ImportError):
import global_state
try:
import tkinter as tk # python 3
import tkinter.font as tk_Font
except:
import Tkinter as tk # python 2
import tkFont as tk_Font
def demo_textbox():
demo_1()
Demo2()
Demo3()
def demo_1():
title = "Demo of textbox: Classic box"
gnexp = ("This is a demo of the classic textbox call, "
"you can see it closes when ok is pressed.\n\n")
challenge = "INSERT A TEXT WITH MORE THAN TWO PARAGRAPHS"
text = "Insert your text here\n"
msg = gnexp + challenge
finished = False
while True:
text = textbox(msg, title, text)
escaped = not text
if escaped or finished:
break
if text.count("\n") >= 2:
msg = (u"You did it right! Press OK")
finished = True
else:
msg = u"You did it wrong! Try again!\n" + challenge
class Demo2(object):
""" Program that challenges the user to write 5 a's """
def __init__(self):
""" Set and run the program """
title = "Demo of textbox: Classic box with callback"
gnexp = ("This is a demo of the textbox with a callback, "
"it doesn't flicker!.\n\n")
msg = "INSERT A TEXT WITH FIVE OR MORE A\'s"
text_snippet = "Insert your text here"
self.finished = False
textbox(gnexp + msg, title, text_snippet, False,
callback=self.check_answer, run=True)
def check_answer(self, box):
""" Callback from TextBox
Parameters
-----------
box: object
object containing parameters and methods to communicate with the ui
Returns
-------
nothing:
its return is through the box object
"""
if self.finished:
box.stop()
if box.text.lower().count("a") >= 5:
box.msg = u"\n\nYou did it right! Press OK button to continue."
box.stop()
self.finished
else:
box.msg = u"\n\nMore a's are needed!"
class Demo3(object):
""" Program that challenges the user to find a typo """
def __init__(self):
""" Set and run the program """
self.finished = False
title = "Demo of textbox: Object with callback"
msg = ("This is a demo of the textbox set as "
"an object with a callback, "
"you can configure it and when you are finished, "
"you run it.\n\nThere is a typo in it. Find and correct it.")
text_snippet = "Hello" # This text wont show
box = textbox(
msg, title, text_snippet, False, callback=self.check_answer, run=False)
box.text = (
"It was the west of times, and it was the worst of times. "
"The rich ate cake, and the poor had cake recommended to them, "
"but wished only for enough cash to buy bread."
"The time was ripe for revolution! ")
box.run()
def check_answer(self, box):
""" Callback from TextBox
Parameters
----------
box: object
object containing parameters and methods to communicate with the ui
Returns
-------
nothing:
its return is through the box object
"""
if self.finished:
box.stop()
if "best" in box.text:
box.msg = u"\n\nYou did right! Press OK button to continue."
self.finished = True
else:
box.msg = u"\n\nLook to the west!"
def textbox(msg="", title=" ", text="",
codebox=False, callback=None, run=True):
""" Display a message and a text to edit
Parameters
----------
msg : string
text displayed in the message area (instructions...)
title : str
the window title
text: str, list or tuple
text displayed in textAreas (editable)
codebox: bool
if True, don't wrap and width is set to 80 chars
callback: function
if set, this function will be called when OK is pressed
run: bool
if True, a box object will be created and returned, but not run
Returns
-------
None
If cancel is pressed
str
If OK is pressed returns the contents of textArea
"""
tb = TextBox(msg=msg, title=title, text=text,
codebox=codebox, callback=callback)
if not run:
return tb
else:
reply = tb.run()
return reply
class TextBox(object):
""" Display a message and a text to edit
This object separates user from ui, defines which methods can
the user invoke and which properties can he change.
It also calls the ui in defined ways, so if other gui
library can be used (wx, qt) without breaking anything for the user.
"""
def __init__(self, msg, title, text, codebox, callback=lambda *args, **kwargs: True):
""" Create box object
Parameters
----------
msg : string
text displayed in the message area (instructions...)
title : str
the window title
text: str, list or tuple
text displayed in textAres (editable)
codebox: bool
if True, don't wrap and width is set to 80 chars
callback: function
if set, this function will be called when OK is pressed
Returns
-------
object
The box object
"""
self.callback = callback
self.ui = GUItk(msg, title, text, codebox, self.callback_ui)
self.text = text
def run(self):
""" Start the ui """
self.ui.run()
self.ui = None
return self._text
def stop(self):
""" Stop the ui """
self.ui.stop()
def callback_ui(self, ui, command, text):
""" This method is executed when ok, cancel, or x is pressed in the ui.
"""
if command == 'update': # OK was pressed
self._text = text
if self.callback:
# If a callback was set, call main process
self.callback(self)
else:
self.stop()
elif command == 'x':
self.stop()
self._text = None
elif command == 'cancel':
self.stop()
self._text = None
# methods to change properties --------------
@property
def text(self):
"""Text in text Area"""
return self._text
@text.setter
def text(self, text):
self._text = self.to_string(text)
self.ui.set_text(self._text)
@text.deleter
def text(self):
self._text = ""
self.ui.set_text(self._text)
@property
def msg(self):
"""Text in msg Area"""
return self._msg
@msg.setter
def msg(self, msg):
self._msg = self.to_string(msg)
self.ui.set_msg(self._msg)
@msg.deleter
def msg(self):
self._msg = ""
self.ui.set_msg(self._msg)
# Methods to validate what will be sent to ui ---------
def to_string(self, something):
try:
basestring # python 2
except NameError:
basestring = str # Python 3
if isinstance(something, basestring):
return something
try:
text = "".join(something) # convert a list or a tuple to a string
except:
textbox(
"Exception when trying to convert {} to text in self.textArea"
.format(type(something)))
sys.exit(16)
return text
class GUItk(object):
""" This is the object that contains the tk root object"""
def __init__(self, msg, title, text, codebox, callback):
""" Create ui object
Parameters
----------
msg : string
text displayed in the message area (instructions...)
title : str
the window title
text: str, list or tuple
text displayed in textAres (editable)
codebox: bool
if True, don't wrap, and width is set to 80 chars
callback: function
if set, this function will be called when OK is pressed
Returns
-------
object
The ui object
"""
self.callback = callback
self.boxRoot = tk.Tk()
# self.boxFont = tk_Font.Font(
# family=global_state.PROPORTIONAL_FONT_FAMILY,
# size=global_state.PROPORTIONAL_FONT_SIZE)
wrap_text = not codebox
if wrap_text:
self.boxFont = tk_Font.nametofont("TkTextFont")
self.width_in_chars = global_state.prop_font_line_length
else:
self.boxFont = tk_Font.nametofont("TkFixedFont")
self.width_in_chars = global_state.fixw_font_line_length
# default_font.configure(size=global_state.PROPORTIONAL_FONT_SIZE)
self.configure_root(title)
self.create_msg_widget(msg)
self.create_text_area(wrap_text)
self.create_buttons_frame()
self.create_cancel_button()
self.create_ok_button()
# Run and stop methods ---------------------------------------
def run(self):
self.boxRoot.mainloop()
self.boxRoot.destroy()
def stop(self):
# Get the current position before quitting
self.get_pos()
self.boxRoot.quit()
# Methods to change content ---------------------------------------
def set_msg(self, msg):
self.messageArea.config(state=tk.NORMAL)
self.messageArea.delete(1.0, tk.END)
self.messageArea.insert(tk.END, msg)
self.messageArea.config(state=tk.DISABLED)
# Adjust msg height
self.messageArea.update()
numlines = self.get_num_lines(self.messageArea)
self.set_msg_height(numlines)
self.messageArea.update()
def set_msg_height(self, numlines):
self.messageArea.configure(height=numlines)
def get_num_lines(self, widget):
end_position = widget.index(tk.END) # '4.0'
end_line = end_position.split('.')[0] # 4
return int(end_line) # 5
def set_text(self, text):
self.textArea.delete(1.0, tk.END)
self.textArea.insert(tk.END, text, "normal")
self.textArea.focus()
def set_pos(self, pos):
self.boxRoot.geometry(pos)
def get_pos(self):
# The geometry() method sets a size for the window and positions it on
# the screen. The first two parameters are width and height of
# the window. The last two parameters are x and y screen coordinates.
# geometry("250x150+300+300")
geom = self.boxRoot.geometry() # "628x672+300+200"
global_state.window_position = '+' + geom.split('+', 1)[1]
def get_text(self):
return self.textArea.get(0.0, 'end-1c')
# Methods executing when a key is pressed -------------------------------
def x_pressed(self):
self.callback(self, command='x', text=self.get_text())
def cancel_pressed(self, event):
self.callback(self, command='cancel', text=self.get_text())
def ok_button_pressed(self, event):
self.callback(self, command='update', text=self.get_text())
# Auxiliary methods -----------------------------------------------
def calc_character_width(self):
char_width = self.boxFont.measure('W')
return char_width
# Initial configuration methods ---------------------------------------
# These ones are just called once, at setting.
def configure_root(self, title):
self.boxRoot.title(title)
self.set_pos(global_state.window_position)
# Quit when x button pressed
self.boxRoot.protocol('WM_DELETE_WINDOW', self.x_pressed)
self.boxRoot.bind("<Escape>", self.cancel_pressed)
self.boxRoot.iconname('Dialog')
def create_msg_widget(self, msg):
if msg is None:
msg = ""
self.msgFrame = tk.Frame(
self.boxRoot,
padx=1.25 * self.calc_character_width(),
)
self.messageArea = tk.Text(
self.msgFrame,
width=self.width_in_chars,
state=tk.DISABLED,
padx=(global_state.default_hpad_in_chars) *
self.calc_character_width(),
pady=self.calc_character_width(),
wrap=tk.WORD,
)
self.set_msg(msg)
self.msgFrame.pack(fill='x')
self.messageArea.pack(fill='x')
def create_text_area(self, wrap_text):
"""
Put a textArea in the top frame
Put and configure scrollbars
"""
self.textFrame = tk.Frame(
self.boxRoot,
padx=1.25 * self.calc_character_width(),
)
self.textFrame.pack(side=tk.TOP)
# self.textFrame.grid(row=1, column=0, sticky=tk.EW)
self.textArea = tk.Text(
self.textFrame,
padx=global_state.default_hpad_in_chars *
self.calc_character_width(),
pady=global_state.default_hpad_in_chars *
self.calc_character_width(),
height=25, # lines. Note: a user-set arg would be preferable to hardcoded value
width=self.width_in_chars, # chars of the current font
)
if wrap_text:
self.textArea.configure(wrap=tk.WORD)
else:
self.textArea.configure(wrap=tk.NONE)
# some simple keybindings for scrolling
self.boxRoot.bind("<Next>", self.textArea.yview_scroll(1, tk.PAGES))
self.boxRoot.bind(
"<Prior>", self.textArea.yview_scroll(-1, tk.PAGES))
self.boxRoot.bind("<Right>", self.textArea.xview_scroll(1, tk.PAGES))
self.boxRoot.bind("<Left>", self.textArea.xview_scroll(-1, tk.PAGES))
self.boxRoot.bind("<Down>", self.textArea.yview_scroll(1, tk.UNITS))
self.boxRoot.bind("<Up>", self.textArea.yview_scroll(-1, tk.UNITS))
# add a vertical scrollbar to the frame
rightScrollbar = tk.Scrollbar(
self.textFrame, orient=tk.VERTICAL, command=self.textArea.yview)
self.textArea.configure(yscrollcommand=rightScrollbar.set)
# add a horizontal scrollbar to the frame
bottomScrollbar = tk.Scrollbar(
self.textFrame, orient=tk.HORIZONTAL, command=self.textArea.xview)
self.textArea.configure(xscrollcommand=bottomScrollbar.set)
# pack the textArea and the scrollbars. Note that although
# we must define the textArea first, we must pack it last,
# so that the bottomScrollbar will be located properly.
# Note that we need a bottom scrollbar only for code.
# Text will be displayed with wordwrap, so we don't need to have
# a horizontal scroll for it.
if not wrap_text:
bottomScrollbar.pack(side=tk.BOTTOM, fill=tk.X)
rightScrollbar.pack(side=tk.RIGHT, fill=tk.Y)
self.textArea.pack(side=tk.LEFT, fill=tk.BOTH, expand=tk.YES)
def create_buttons_frame(self):
self.buttonsFrame = tk.Frame(self.boxRoot,
# background="green",
)
self.buttonsFrame.pack(side=tk.TOP)
def create_cancel_button(self):
# put the buttons in the buttonsFrame
self.cancelButton = tk.Button(
self.buttonsFrame, takefocus=tk.YES, text="Cancel",
height=1, width=6)
self.cancelButton.pack(
expand=tk.NO, side=tk.LEFT, padx='2m', pady='1m', ipady="1m",
ipadx="2m")
# for the commandButton, bind activation events to the activation event
# handler
self.cancelButton.bind("<Return>", self.cancel_pressed)
self.cancelButton.bind("<Button-1>", self.cancel_pressed)
self.cancelButton.bind("<Escape>", self.cancel_pressed)
def create_ok_button(self):
# put the buttons in the buttonsFrame
self.okButton = tk.Button(
self.buttonsFrame, takefocus=tk.YES, text="OK", height=1, width=6)
self.okButton.pack(
expand=tk.NO, side=tk.LEFT, padx='2m', pady='1m', ipady="1m",
ipadx="2m")
# for the commandButton, bind activation events to the activation event
# handler
self.okButton.bind("<Return>", self.ok_button_pressed)
self.okButton.bind("<Button-1>", self.ok_button_pressed)
if __name__ == '__main__':
demo_textbox()