diff --git a/docs/build/html/_modules/index.html b/docs/build/html/_modules/index.html index d872c66..5faf05f 100644 --- a/docs/build/html/_modules/index.html +++ b/docs/build/html/_modules/index.html @@ -50,6 +50,7 @@
  • pylib.numerical.ode
  • pylib.numerical.ode_model
  • pylib.time_of_day
    • +
  • pylib.tui
    • diff --git a/docs/build/html/_modules/pylib/geometry_plot_pylab.html b/docs/build/html/_modules/pylib/geometry_plot_pylab.html index db0fd80..7b8928a 100644 --- a/docs/build/html/_modules/pylib/geometry_plot_pylab.html +++ b/docs/build/html/_modules/pylib/geometry_plot_pylab.html @@ -180,7 +180,37 @@ plot_post(ax) - def press(event, world, lps): + # 'rotate: ←left, right, up, down, ctrl+left, ctrl+right\n' + + # 'pan: shift+left, shift+right, shift+up, shift+down\n' + + # 'zoom: ctrl+up, ctrl+down\n' + + # 'view: f (front), l (left), r (right), t (top), b (bottom)\n' + + # ' i (isometric), d (dimetric)', + h_open = pylab.text( + 0+.01, 1-.015, + 'rotate: [←], [→], [↑], [↓], [Ctrl][←], [Ctrl][→]\n' + + 'pan: [Shift][←], [Shift][→], [Shift][↑], [Shift][↓]\n' + + 'zoom: [Ctrl][↑], [Ctrl][↓]\n' + + 'view: [f]ront, [l]eft, [r]ight, [t]op, [b]ottom\n' + + ' [i]sometric, [d]imetric', + color='#2280c0', + horizontalalignment='left', + verticalalignment='top', + transform=fig.transFigure, + bbox=dict(facecolor='black', edgecolor='#196090', alpha=0.5), + family='monospace' + ) + h_close = pylab.text( + 0+.01, 1-.015, '[h]elp', + color='#2280c0', + horizontalalignment='left', + verticalalignment='top', + transform=fig.transFigure, + bbox=dict(facecolor='black', edgecolor='#196090', alpha=0.5), + family='monospace', + visible=False + ) + + def press(event, world, lps, h_open, h_close): #print('key pressed:', event.key) #sys.stdout.flush() if event.key in [ @@ -250,6 +280,10 @@ world.scale(0.9) for i, j in zip(lps, world.wireframes_xy()): i.set_data(j) + if event.key == 'h': + visible = h_open.get_visible() + h_open.set_visible(not visible) + h_close.set_visible(visible) fig.canvas.draw() def onresize(event, w): @@ -258,28 +292,10 @@ pylab.ylim((-r, r)) fig.canvas.mpl_connect('key_press_event', - lambda event: press(event, world, lps)) + lambda event: press(event, world, lps, + h_open, h_close)) fig.canvas.mpl_connect('resize_event', lambda event: onresize(event, world)) - - # 'rotate: ←left, right, up, down, ctrl+left, ctrl+right\n' + - # 'pan: shift+left, shift+right, shift+up, shift+down\n' + - # 'zoom: ctrl+up, ctrl+down\n' + - # 'view: f (front), l (left), r (right), t (top), b (bottom)\n' + - # ' i (isometric), d (dimetric)', - pylab.text( - 0+.01, 1-.015, - 'rotate: [←], [→], [↑], [↓], [Ctrl][←], [Ctrl][→]\n' + - 'pan: [Shift][←], [Shift][→], [Shift][↑], [Shift][↓]\n' + - 'zoom: [Ctrl][↑], [Ctrl][↓]\n' + - 'view: [f]ront, [l]eft, [r]ight, [t]op, [b]ottom\n' + - ' [i]sometric, [d]imetric', - horizontalalignment='left', - verticalalignment='top', - transform=fig.transFigure, - bbox=dict(facecolor='black', alpha=0.5), - family='monospace' - ) pylab.show() diff --git a/docs/build/html/_modules/pylib/helper.html b/docs/build/html/_modules/pylib/helper.html index 3f9bc32..cf376b3 100644 --- a/docs/build/html/_modules/pylib/helper.html +++ b/docs/build/html/_modules/pylib/helper.html @@ -45,6 +45,7 @@ .. moduleauthor:: Daniel Weschke <daniel.weschke@directbox.de> """ +import os import time from contextlib import ContextDecorator @@ -81,6 +82,46 @@ elapsed_time_ms = (time.time() - self.start_time) * 1000 print('{:s} took {:.3f} ms'.format(self.description, elapsed_time_ms)) return False + +
    [docs]class cd: + """Context manager for changing the current working directory + + :param new_path: the directory to change into + :type new_path: string + + :Example: + + :: + + # enter the directory and run some code: + with cd("~/tmp"): + # we are now in ~/tmp + # code + # outside the context manager we are back where we started. + """ + def __init__(self, new_path): + self.new_path = os.path.expanduser(new_path) + + def __enter__(self): + self.saved_path = os.getcwd() + os.chdir(self.new_path) + + def __exit__(self, etype, value, traceback): + os.chdir(self.saved_path)
    + +
    [docs]def run_file(file_name): + """Run a file. + + Inside a pythin interpreter it changes to the directory of the + file and after excuting the file it changes back to the working + directory before. + + :param file_name: the file to execute + :type file_name: string + """ + workdir = os.path.dirname(os.path.abspath(file_name)) + with cd(workdir): + exec(open(file_name).read())
    diff --git a/docs/build/html/_modules/pylib/mathematics.html b/docs/build/html/_modules/pylib/mathematics.html index 8e78a6a..3b10655 100644 --- a/docs/build/html/_modules/pylib/mathematics.html +++ b/docs/build/html/_modules/pylib/mathematics.html @@ -668,7 +668,7 @@ """
    [docs] def __getitem__(self, index): - """ + r""" For index return value, for range return new vector object. :Example: @@ -825,7 +825,7 @@ :Example: >>> m = matrix.zeros(3, 3) - >>> print(m)\ + >>> print(m) [[0.0, 0.0, 0.0], [0.0, 0.0, 0.0], [0.0, 0.0, 0.0]] """ return matrix([[0. for i in range(n)] for j in range(m)])
    diff --git a/docs/build/html/_modules/pylib/tui.html b/docs/build/html/_modules/pylib/tui.html new file mode 100644 index 0000000..2c64980 --- /dev/null +++ b/docs/build/html/_modules/pylib/tui.html @@ -0,0 +1,463 @@ + + + + + + + pylib.tui — pylib 2019.12.21 documentation + + + + + + + + + + + + + + + + + + + + +
    +
    +
    + + +
    + +

    Source code for pylib.tui

    +#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""TUI module.
+
+:Date: 2020-01-10
+
+.. module:: tui
+  :platform: *nix, Windows
+  :synopsis: TUI module.
+
+.. moduleauthor:: Daniel Weschke <daniel.weschke@directbox.de>
+"""
+# TODO: two classes to distinguish between curses (main tui) and
+#       window (to handle sub windows)?
+# TODO: width resizing, min width now 6 because of text and border
+# TODO: height resizing, min height
+import sys
+import curses
+
+
+
    [docs]def newwin(height, width, y, x):
+  win = Window()
+  win.window = curses.newwin(height, width, y, x)
+  return win
    
+
+
+
    [docs]class StdOutWrapper:
+  """Send print to stdout (print to the standard console).
+
+  usage:
+
+  ::
+
+    # catch all prints into StdOutWrapper
+    mystdout = StdOutWrapper()
+    sys.stdout = mystdout
+    sys.stderr = mystdout
+
+    # begin curses (curses.initscr())
+
+    # do your stuff here
+    # print("foo")
+    # you can also output mystdout.get_text() in a ncurses widget in
+    # runtime
+
+    # end curses (curses.endwin())
+
+    # go back to normal state and print all catched prints to stdout
+    sys.stdout = sys.__stdout__
+    sys.stderr = sys.__stderr__
+    sys.stdout.write(mystdout.get_text())
+
+  source:
+    https://stackoverflow.com/a/14010948
+  """
+  text = ""
+
    [docs]  def write(self, txt):
+    self.text += txt
+    self.text = '\n'.join(self.text.split('\n')[-30:])
    
+
    [docs]  def get_text(self):
+    return '\n'.join(self.text.split('\n'))
    
+  #def get_text(self,beg,end):
+  #    return '\n'.join(self.text.split('\n')[beg:end])
+
+
+
    [docs]class TUI:
+  """TUI text-based user interface
+
+  initscr is the encapsulation window object of the stdscr
+  stdsc is the curses.initscr
+  """
+
+  def __init__(self, delay=5):
+    """
+    :param delay: sets the curses.halfdelay, value between 1 and 255.
+    :param type: int
+    """
+    if not isinstance(delay, int):
+      try:
+        delay = int(delay)
+      except ValueError:
+        print("TUI(delay)")
+        print("Could not convert the argument to an integer.")
+
+    # catch all prints into StdOutWrapper
+    self.stdout = StdOutWrapper()
+    sys.stdout = self.stdout
+    sys.stderr = self.stdout
+
+    # Define the appearance of some interface elements
+    hotkey_attr = curses.A_BOLD | curses.A_UNDERLINE
+    menu_attr = curses.A_NORMAL
+
+    self.initscr = Window()
+    self.initscr.initscr()
+    self.stdscr = self.initscr.window
+    #print(type(self.stdscr))
+    #print(type(self.initscr))
+
+    try:
+      curses.cbreak()
+      curses.halfdelay(delay)              # How many tenths of a second are waited, from 1 to 255
+      #stdscr.nodelay(1)
+      curses.noecho()
+      self.cursor_visibility = 0           # Set the cursor state. visibility can be set to 0, 1, or 2, for invisible, normal, or very visible.
+      curses.curs_set(self.cursor_visibility)
+      self.stdscr.keypad(1)
+      curses.mousemask(1)                  # activate mouse events
+
+      # init colors
+      if curses.has_colors():
+        curses.start_color()  # initializes 8 basic colors. 0:black, 1:red, 2:green, 3:yellow, 4:blue, 5:magenta, 6:cyan, and 7:white.
+        curses.use_default_colors()
+        for i in range(0, curses.COLORS):
+          curses.init_pair(i + 1, i, -1)  # Color pair 0 is hard-wired to white on black, and cannot be changed.
+    except: pass
+
+    self.last_pressed_ch = 0                                                        # getch() Note that the integer returned does not have to be in ASCII range: function keys, keypad keys and so on return numbers higher than 256.
+    self.last_pressed_mouse_ch = 0
+
+
    [docs]  def refresh(self):
+    self.initscr.refresh()  # update the screen
    
+
+
    [docs]  def getch(self):
+    # keep last key value
+    last_pressed_ch_current = self.initscr.getch()
+    if last_pressed_ch_current != curses.ERR:
+      # keep last key while window resizing
+      if last_pressed_ch_current == curses.KEY_MOUSE:
+        self.last_pressed_mouse_ch = last_pressed_ch_current
+      if last_pressed_ch_current in [curses.KEY_MOUSE, curses.KEY_RESIZE]:
+        pass
+      else:
+        self.last_pressed_ch = last_pressed_ch_current
    
+
+
    [docs]  def color_table(self, window=None):
+    """Print all available colors with default background.
+    Check if curses.has_colors() is True.
+    """
+    # TODO: position
+    # FIXME: use own text method?
+    # FIXME: build full str first and then print?
+    if not curses.has_colors():
+      return
+    if window is None:
+      window = self.stdscr
+
+    window.addstr(2, 1, '{0} colors available'.format(curses.COLORS))
+    if curses.can_change_color():
+      window.addstr(' (can change color: {0})'.format(curses.can_change_color()))
+    _, maxx = window.getmaxyx()
+    step_size = 4
+    maxx = maxx - maxx % step_size
+    x = 0
+    y = 3
+    try:
+      for i in range(0, curses.COLORS):
+        window.addstr(y, x, '{0:{1}}'.format(i, step_size), curses.color_pair(i))
+        x = (x + step_size) % maxx
+        if x == 0:
+          y += 1
+    except:
+      # End of screen reached
+      pass
    
+
+
    [docs]  def color_def(self):
+    if curses.can_change_color():  # if True curses.init_color(color_number, r, g, b) can be used
+      pass
    
+      # changes colors for the terminal also after closing the program.
+      #curses.color_content(0)
+      #tmp = curses.color_content(1)
+      #print(curses.color_content(1))
+      #curses.init_color(0, 1000, 0, 0)  # color_number = init_pair number - 1 (maybe because init_pair number 0 is hard-wired and not changeable)
+      #curses.init_color(1, 1000, 500, 1000)
+      #print(curses.color_content(1))
+      #curses.init_color(1, *tmp)
+      #print(curses.color_content(1))
+
+
    [docs]  def clear(self):
+    self.stdscr.clear()
    
+
+
    [docs]  def end(self):
+    """clean up"""
+    self.stdscr.clear()
+    curses.nocbreak()
+    self.stdscr.keypad(0)
+    curses.echo()
+    curses.endwin()
+
+    # go back to normal state and print all catched prints to stdout
+    sys.stdout = sys.__stdout__
+    sys.stderr = sys.__stderr__
+    sys.stdout.write(self.stdout.get_text())
    
+
+
+
    [docs]class Window:
+  """Window
+  """
+  def __init__(self):
+    self.window = None
+
+
    [docs]  def initscr(self):
+    self.window = curses.initscr()
    
+
+
    [docs]  def derwin(self, height, width, y, x):
+    win = Window()
+    win.window = self.window.derwin(height, width, y, x)
+    return win
    
+
+
    [docs]  def clear(self):
+    return self.window.clear()
    
+
+
    [docs]  def getmaxyx(self):
+    return self.window.getmaxyx()
    
+
+
    [docs]  def getch(self):
+    return self.window.getch()
    
+
+
    [docs]  def instr(self, y, x, n):
+    return self.window.instr(y, x, n).decode()
    
+
+
    [docs]  def text(self, string, padding_left=0, padding_top=0, attribute=0, color_pair=0):
+    r"""Test to screen. If multiline than keep the x position for
+    each new line.
+
+    :Example:
+
+    ::
+
+      text(stdscr, 2, 1, "1 - Show test page")
+      text(stdscr, 3, 1, "h - Show help page")
+      text(stdscr, 4, 1, "q - Exit")
+
+      text(stdscr, 2, 1,
+           "1 - Show test page\\n" +
+           "h - Show help page\\n" +
+           "q - Exit")
+
+    .. note::
+      Writing in the last char of the window (last row bottom and
+      last column right) is suppressed
+    """
+    win_height, win_width = self.window.getmaxyx()
+    if win_width-padding_left < 2:  # unicode can have 2 char width
+      return
+    yi = padding_top
+    #for row in string.split("\n"):
+    #  window.addnstr(yi, x, row, win_width-x-1, curses.color_pair(9))  # 5
+    #  yi += 1
+    for row in string.split("\n"):  # TODO: os.linesep?
+      xi = padding_left
+      for char in row:
+        # write only inside the window
+        if not yi >= win_height and not xi >= win_width:
+          # do not write in the last char of window (last row bottom and last column right)
+          # unicodes may use multiple chars, this will raise an error for the last char in the window
+          if yi == win_height-1 and xi >= win_width-1:
+            break
+          #if yi == win_height-1 and xi >= win_width-1:
+          #  try:
+          #    char.encode("ascii")
+          #  except UnicodeEncodeError:
+          #    break
+
+          # dont add str if empty braille char or simple space character
+          if char != chr(0x2800) and char != " " and xi < win_width and yi < win_height:
+            self.window.addstr(yi, xi, char, attribute|curses.color_pair(color_pair))
+        xi += 1
+      yi += 1
    
+
+
    [docs]  def border(self, title="", footer_left="", footer_right="", style="horizontal"):
+    """Set border around the window with optional title and footer
+    labels.
+
+    :param window: the window to draw a border
+    :type window: curses.window
+    :param title: the title for the window (default = "")
+    :type title: str
+    :param footer_left: the footer label (default = ""). If footer_left
+      is a list than every element of the list will be printed sperated
+      by one column. This is useful to not overwright the border with a
+      space character.
+    :type footer_left: str or list
+    """
+    win_height, win_width = self.window.getmaxyx()
+    if win_width < 3:
+      return
+
+    if isinstance(style, str):
+      if style == "horizontal":
+        self.window.border(
+          ' ',
+          ' ',
+          curses.ACS_HLINE,
+          curses.ACS_HLINE,
+          curses.ACS_HLINE,
+          curses.ACS_HLINE,
+          curses.ACS_HLINE,
+          curses.ACS_HLINE,
+        )
+      elif style == "full":
+        self.window.border(0, 0, 0, 0, 0, 0, 0, 0, )
+    else:  # list
+      self.window.border(*style)
+
+    if title:
+      self.text(title, 1)
+
+    if footer_left:
+      last_win_row = win_height - 1
+      if isinstance(footer_left, str):
+        self.text(footer_left, 1, last_win_row)
+      else:  # list
+        pos = 1
+        for footer_left_i in footer_left:
+          self.text(footer_left_i, pos, win_height-1)
+          pos += len(footer_left_i)+1
+
+    if footer_right:
+      self.text(footer_right, win_width - 1 - len(footer_right), last_win_row)
    
+
+
    [docs]  def textbox(self, height, width, y, x, borders=False):
+    """Add sub window.
+
+    :param parent_window: the parent window
+    :type parent_window: curses.window
+    :param height: the height of the sub window. The reference point of
+      the sub window is the top left corner.
+    :type height: int
+    :param width: the width of the sub window. The reference point of
+      the sub window is the top left corner.
+    :type width: int
+    :param y: the y coordinate (position) of the sub window. Start from
+      the top.
+    :type y: int
+    :param x: the x coordinate (position) of the sub window. Start from
+      the left.
+    :returns: the sub window content and decoration
+    :rtype: (curses.window, curses.window)
+    """
+    # TODO: not to work with two window object but one with the
+    #       possibility to access the derwin(s). Either self.derwins
+    #       or another DoubleWindow class for border and text or do it
+    #       in this class?
+    screen_height, screen_width = self.window.getmaxyx()
+    newwin_width = screen_width-x if x+width > screen_width else width
+    newwin_height = screen_height-y if y+height > screen_height else height
+    if newwin_width > 0 and newwin_height > 0:
+      win = self.derwin(newwin_height, newwin_width, y, x)
+      if borders:
+        win.border(style="full")
+        if newwin_width-2 > 0 and newwin_height-1 > 0:
+          subwin = win.derwin(newwin_height-1, newwin_width-2, 1, 1)
+          return subwin, win  # text and border
+        return newwin(1, 1, 0, 0), win  # only border, no text (top left 1 char)
+      return win, newwin(1, 1, 0, 0)  # only text, no border (top left 1 char)
+    return newwin(1, 1, 0, 0), newwin(1, 1, 0, 0)  # no border and no text (top left 1 char)
    
+
+
    [docs]  def refresh(self):
+    self.window.refresh()
    
+
    + +
    + +
    +
    + +
    +
    +
    + ©2019, Daniel Weschke. + + | + Powered by Sphinx 2.2.1 + & Alabaster 0.7.12 + +
    + + + + + + \ No newline at end of file diff --git a/docs/build/html/_sources/index.rst.txt b/docs/build/html/_sources/index.rst.txt index e0ae45b..08341a4 100644 --- a/docs/build/html/_sources/index.rst.txt +++ b/docs/build/html/_sources/index.rst.txt @@ -15,8 +15,39 @@ Welcome to pylib's documentation! Indices and tables -================== +------------------ * :ref:`genindex` * :ref:`modindex` * :ref:`search` + + + +tui +--- + +pylib/tui.py is the main module for tui 'terminal user interface' programs. + +* curses package (for Windows install windows-curses) is the underlying main + package to build terminal programs. The curses package can also be used + directly. + + * Windows (Anaconda): + + * ``C:\PathToAnaconda3\condabin\conda.bat activate base`` + * ``python -m pip install windows-curses`` + * https://github.com/zephyrproject-rtos/windows-curses + +* drawille package is used to draw with braille characters (dottet and quasi- + line charts). Make sure you use a font with Unicode Braille characters. For + Windows e. g.: NSimSun, MS Gothic. + + * Install: ``python -m pip install drawille`` + * Windows (Anaconda): + + * ``C:\PathToAnaconda3\condabin\conda.bat activate base`` + * ``python -m pip install drawille`` + +* drawblock.py is used to draw with block characters (histogram). + +example/tui.py is an example script to build a terminal program. diff --git a/docs/build/html/_sources/pylib.rst.txt b/docs/build/html/_sources/pylib.rst.txt index 524f6f0..4275b18 100644 --- a/docs/build/html/_sources/pylib.rst.txt +++ b/docs/build/html/_sources/pylib.rst.txt @@ -32,3 +32,4 @@ Submodules pylib.helper pylib.mathematics pylib.time_of_day + pylib.tui diff --git a/docs/build/html/_sources/pylib.tui.rst.txt b/docs/build/html/_sources/pylib.tui.rst.txt new file mode 100644 index 0000000..b61f490 --- /dev/null +++ b/docs/build/html/_sources/pylib.tui.rst.txt @@ -0,0 +1,7 @@ +pylib.tui module +================ + +.. automodule:: pylib.tui + :members: + :undoc-members: + :show-inheritance: diff --git a/docs/build/html/genindex.html b/docs/build/html/genindex.html index 127b7ed..16355b1 100644 --- a/docs/build/html/genindex.html +++ b/docs/build/html/genindex.html @@ -186,15 +186,17 @@
  • b_spline_curve_with_knots() (in module pylib.function)
    • - - + - + - + - + @@ -417,9 +445,13 @@
  • in_seconds() (in module pylib.time_of_day)
  • init_xyz() (CS class method) +
    • +
  • initscr() (Window method)
    • @@ -602,6 +638,12 @@
  • rectangle() (in module pylib.geometry2d)
    • +
  • refresh() (TUI method) + +
  • REPRESENTATION_ITEM (class in pylib.data_step_std)
  • rotate() (in module pylib.geometry2d) @@ -642,6 +684,8 @@
  • (World method)
    • +
  • run_file() (in module pylib.helper) +
  • rx() (matrix static method)
  • ry() (matrix static method) @@ -695,6 +739,8 @@
  • space_diagonal() (World method)
  • square() (in module pylib.geometry2d) +
    • +
  • StdOutWrapper (class in pylib.tui)
  • step (class in pylib.data_step)
    • @@ -715,6 +761,12 @@
    @@ -788,6 +844,8 @@

    W

    diff --git a/docs/build/html/index.html b/docs/build/html/index.html index 3654d3c..1bbe66b 100644 --- a/docs/build/html/index.html +++ b/docs/build/html/index.html @@ -44,14 +44,48 @@ -
    -

    Indices and tables

    +

    Indices and tables

    +
    +
    +

    tui

    +

    pylib/tui.py is the main module for tui ‘terminal user interface’ programs.

    + +

    example/tui.py is an example script to build a terminal program.

    +
    diff --git a/docs/build/html/modules.html b/docs/build/html/modules.html index 62be430..bcb2010 100644 --- a/docs/build/html/modules.html +++ b/docs/build/html/modules.html @@ -61,6 +61,7 @@
  • pylib.helper module
  • pylib.mathematics module
  • pylib.time_of_day module
    • +
  • pylib.tui module
    • diff --git a/docs/build/html/objects.inv b/docs/build/html/objects.inv index 4bb359d..05cf008 100644 Binary files a/docs/build/html/objects.inv and b/docs/build/html/objects.inv differ diff --git a/docs/build/html/py-modindex.html b/docs/build/html/py-modindex.html index 7ac03f1..3123d41 100644 --- a/docs/build/html/py-modindex.html +++ b/docs/build/html/py-modindex.html @@ -261,6 +261,11 @@     pylib.time_of_day + + +     + pylib.tui +   t @@ -269,6 +274,11 @@ time_of_day (*nix, Windows) Calculate time. + + + + tui (*nix, Windows) + TUI module. diff --git a/docs/build/html/pylib.helper.html b/docs/build/html/pylib.helper.html index d8288b7..27d29ea 100644 --- a/docs/build/html/pylib.helper.html +++ b/docs/build/html/pylib.helper.html @@ -43,6 +43,41 @@
    +
    +class cd(new_path)[source]
    +

    Bases: object

    +

    Context manager for changing the current working directory

    +
    +
    Parameters
    +

    new_path (string) – the directory to change into

    +
    +
    Example
    +

    +
    +
    # enter the directory and run some code:
+with cd("~/tmp"):
+  # we are now in ~/tmp
+  # code
+# outside the context manager we are back where we started.
+
    +
    +
    + +
    +
    +run_file(file_name)[source]
    +

    Run a file.

    +

    Inside a pythin interpreter it changes to the directory of the +file and after excuting the file it changes back to the working +directory before.

    +
    +
    Parameters
    +

    file_name (string) – the file to execute

    +
    +
    +
    + +
    class timeit(description=None)[source]

    Bases: contextlib.ContextDecorator

    diff --git a/docs/build/html/pylib.html b/docs/build/html/pylib.html index 173e730..58e32d3 100644 --- a/docs/build/html/pylib.html +++ b/docs/build/html/pylib.html @@ -71,6 +71,7 @@
  • pylib.helper module
  • pylib.mathematics module
  • pylib.time_of_day module
    • +
  • pylib.tui module
    • diff --git a/docs/build/html/pylib.mathematics.html b/docs/build/html/pylib.mathematics.html index fc837ab..a2097a9 100644 --- a/docs/build/html/pylib.mathematics.html +++ b/docs/build/html/pylib.mathematics.html @@ -61,7 +61,8 @@
    Example

    -
    >>> m = matrix([[1, 2, 3, 0], [4, 5, 6, 0], [7, 8, 9, 0],                     [0, 0, 0, 0]])
+
    >>> m = matrix([[1, 2, 3, 0], [4, 5, 6, 0], [7, 8, 9, 0], \
+                [0, 0, 0, 0]])
 >>> print(m[:])
 [[1, 2, 3, 0], [4, 5, 6, 0], [7, 8, 9, 0], [0, 0, 0, 0]]
 >>> print(m[2])
@@ -442,7 +443,8 @@ filled with zeros.
    
 
    
 
 
    >>> m = matrix.zeros(3, 3)
->>> print(m)    [[0.0, 0.0, 0.0], [0.0, 0.0, 0.0], [0.0, 0.0, 0.0]]
+>>> print(m)
+[[0.0, 0.0, 0.0], [0.0, 0.0, 0.0], [0.0, 0.0, 0.0]]
 
    
 
    
 
diff --git a/docs/build/html/pylib.tui.html b/docs/build/html/pylib.tui.html
new file mode 100644
index 0000000..69461be
--- /dev/null
+++ b/docs/build/html/pylib.tui.html
@@ -0,0 +1,328 @@
+
+
+
+
+  
+    
+    pylib.tui module — pylib 2019.12.21 documentation
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+   
+  
+  
+  
+  
+
+  
+  
+
+    
    
+      
    
+        
    
+          
+
+          
    
+            
+  
    
+
    pylib.tui module
    
+
    TUI module.
    
+
    
+
    Date
    
+
    2020-01-10
    
+
    
+
    
+
    
+
    
+class StdOutWrapper[source]
    
+
    Bases: object
    
+
    Send print to stdout (print to the standard console).
    
+
    usage:
    
+
    # catch all prints into StdOutWrapper
+mystdout = StdOutWrapper()
+sys.stdout = mystdout
+sys.stderr = mystdout
+
+# begin curses (curses.initscr())
+
+# do your stuff here
+# print("foo")
+# you can also output mystdout.get_text() in a ncurses widget in
+# runtime
+
+# end curses (curses.endwin())
+
+# go back to normal state and print all catched prints to stdout
+sys.stdout = sys.__stdout__
+sys.stderr = sys.__stderr__
+sys.stdout.write(mystdout.get_text())
+
    
+
    
+
    
+
    source:
    https://stackoverflow.com/a/14010948
    
+
    
+
    
+
    
+
    
+get_text()[source]
    
+
    
+
+
    
+
    
+text = ''
    
+
    
+
+
    
+
    
+write(txt)[source]
    
+
    
+
+
    
+
+
    
+
    
+class TUI(delay=5)[source]
    
+
    Bases: object
    
+
    TUI text-based user interface
    
+
    initscr is the encapsulation window object of the stdscr
+stdsc is the curses.initscr
    
+
    
+
    
+clear()[source]
    
+
    
+
+
    
+
    
+color_def()[source]
    
+
    
+
+
    
+
    
+color_table(window=None)[source]
    
+
    Print all available colors with default background.
+Check if curses.has_colors() is True.
    
+
    
+
+
    
+
    
+end()[source]
    
+
    clean up
    
+
    
+
+
    
+
    
+getch()[source]
    
+
    
+
+
    
+
    
+refresh()[source]
    
+
    
+
+
    
+
+
    
+
    
+class Window[source]
    
+
    Bases: object
    
+
    
+
    
+border(title='', footer_left='', footer_right='', style='horizontal')[source]
    
+
    Set border around the window with optional title and footer
+labels.
    
+
    
+
    Parameters
    
+
      
+
    • window (curses.window) – the window to draw a border
      • 
+
    • title (str) – the title for the window (default = “”)
      • 
+
    • footer_left (str or list) – the footer label (default = “”). If footer_left
+is a list than every element of the list will be printed sperated
+by one column. This is useful to not overwright the border with a
+space character.
      • 
+
    
+
    
+
    
+
    
+
+
    
+
    
+clear()[source]
    
+
    
+
+
    
+
    
+derwin(height, width, y, x)[source]
    
+
    
+
+
    
+
    
+getch()[source]
    
+
    
+
+
    
+
    
+getmaxyx()[source]
    
+
    
+
+
    
+
    
+initscr()[source]
    
+
    
+
+
    
+
    
+instr(y, x, n)[source]
    
+
    
+
+
    
+
    
+refresh()[source]
    
+
    
+
+
    
+
    
+text(string, padding_left=0, padding_top=0, attribute=0, color_pair=0)[source]
    
+
    Test to screen. If multiline than keep the x position for
+each new line.
    
+
    
+
    Example
    
+
    
+
    
+
    text(stdscr, 2, 1, "1 - Show test page")
+text(stdscr, 3, 1, "h - Show help page")
+text(stdscr, 4, 1, "q - Exit")
+
+text(stdscr, 2, 1,
+     "1 - Show test page\\n" +
+     "h - Show help page\\n" +
+     "q - Exit")
+
    
+
    
+
    
+
    Note
    
+
    Writing in the last char of the window (last row bottom and
+last column right) is suppressed
    
+
    
+
    
+
+
    
+
    
+textbox(height, width, y, x, borders=False)[source]
    
+
    Add sub window.
    
+
    
+
    Parameters
    
+
      
+
    • parent_window (curses.window) – the parent window
      • 
+
    • height (int) – the height of the sub window. The reference point of
+the sub window is the top left corner.
      • 
+
    • width (int) – the width of the sub window. The reference point of
+the sub window is the top left corner.
      • 
+
    • y (int) – the y coordinate (position) of the sub window. Start from
+the top.
      • 
+
    • x – the x coordinate (position) of the sub window. Start from
+the left.
      • 
+
    
+
    
+
    Returns
    
+
    the sub window content and decoration
    
+
    
+
    Return type
    
+
    (curses.window, curses.window)
    
+
    
+
    
+
    
+
+
    
+
+
    
+
    
+newwin(height, width, y, x)[source]
    
+
    
+
+
    
+
+
+          
    
+          
+        
    
+      
    
+      
+      
    
+    
    
+    
    
+      ©2019, Daniel Weschke.
+      
+      |
+      Powered by Sphinx 2.2.1
+      & Alabaster 0.7.12
+      
+      |
+      Page source
+    
    
+
+    
+
+    
+  
+
\ No newline at end of file
diff --git a/docs/build/html/searchindex.js b/docs/build/html/searchindex.js
index 91eb401..70c380c 100644
--- a/docs/build/html/searchindex.js
+++ b/docs/build/html/searchindex.js
@@ -1 +1 @@
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to pylib\u2019s documentation!","pylib","pylib package","pylib.data module","pylib.data_step module","pylib.data_step_std module","pylib.date module","pylib.drawblock module","pylib.function module","pylib.geometry module","pylib.geometry2d module","pylib.geometry2d_plot module","pylib.geometry_plot module","pylib.geometry_plot_pylab module","pylib.helper module","pylib.mathematics module","pylib.numerical package","pylib.numerical.fit module","pylib.numerical.integration module","pylib.numerical.ode module","pylib.numerical.ode_model module","pylib.time_of_day module","pylib.tui module"],titleterms:{"function":8,data:3,data_step:4,data_step_std:5,date:6,document:0,drawblock:7,fit:17,geometri:9,geometry2d:10,geometry2d_plot:11,geometry_plot:12,geometry_plot_pylab:13,helper:14,indic:0,integr:18,mathemat:15,modul:[3,4,5,6,7,8,9,10,11,12,13,14,15,17,18,19,20,21,22],numer:[16,17,18,19,20],ode:19,ode_model:20,packag:[2,16],pylib:[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22],submodul:[2,16],subpackag:2,tabl:0,time_of_dai:21,tui:[0,22],welcom:0}})
\ No newline at end of file
diff --git a/docs/source/index.rst b/docs/source/index.rst
index e0ae45b..08341a4 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -15,8 +15,39 @@ Welcome to pylib's documentation!
 
 
 Indices and tables
-==================
+------------------
 
 * :ref:`genindex`
 * :ref:`modindex`
 * :ref:`search`
+
+
+
+tui
+---
+
+pylib/tui.py is the main module for tui 'terminal user interface' programs.
+
+* curses package (for Windows install windows-curses) is the underlying main
+  package to build terminal programs. The curses package can also be used
+  directly.
+
+  * Windows (Anaconda):
+
+    * ``C:\PathToAnaconda3\condabin\conda.bat activate base``
+    * ``python -m pip install windows-curses``
+    * https://github.com/zephyrproject-rtos/windows-curses
+
+* drawille package is used to draw with braille characters (dottet and quasi-
+  line charts). Make sure you use a font with Unicode Braille characters. For
+  Windows e. g.: NSimSun, MS Gothic.
+
+  * Install: ``python -m pip install drawille``
+  * Windows (Anaconda):
+
+    * ``C:\PathToAnaconda3\condabin\conda.bat activate base``
+    * ``python -m pip install drawille``
+
+* drawblock.py is used to draw with block characters (histogram).
+
+example/tui.py is an example script to build a terminal program.
diff --git a/docs/source/pylib.rst b/docs/source/pylib.rst
index 524f6f0..4275b18 100644
--- a/docs/source/pylib.rst
+++ b/docs/source/pylib.rst
@@ -32,3 +32,4 @@ Submodules
    pylib.helper
    pylib.mathematics
    pylib.time_of_day
+   pylib.tui
diff --git a/docs/source/pylib.tui.rst b/docs/source/pylib.tui.rst
new file mode 100644
index 0000000..b61f490
--- /dev/null
+++ b/docs/source/pylib.tui.rst
@@ -0,0 +1,7 @@
+pylib.tui module
+================
+
+.. automodule:: pylib.tui
+   :members:
+   :undoc-members:
+   :show-inheritance:
diff --git a/examples/function_b_spline.py b/examples/function_b_spline.py
index 212ab21..65ce8a2 100755
--- a/examples/function_b_spline.py
+++ b/examples/function_b_spline.py
@@ -10,16 +10,15 @@
 
 .. moduleauthor:: Daniel Weschke 
 """
+from mpl_toolkits.mplot3d import Axes3D
+assert Axes3D
+import pylab
 from pylib.data import seq, unique_list
 from pylib.function import (
   sample_half_open, sample_half_open_seq,
   b_spline_basis, b_spline_knots, b_spline_curve_with_knots)
 from pylib.helper import timeit
 
-from mpl_toolkits.mplot3d import Axes3D
-assert Axes3D
-import pylab
-
 
 def b_spline_basis_functions(knots, pmax=None):
   m = len(knots) - 1  # m = 3
@@ -27,7 +26,7 @@ def b_spline_basis_functions(knots, pmax=None):
     pmax = m
   u = seq(knots[0], knots[-1], (knots[-1]-knots[0])/50)
   Nij = [[[b_spline_basis(knots, i, j)(uj) for uj in u] for
-           i in range(m-j)] for j in range(pmax+1)]
+          i in range(m-j)] for j in range(pmax+1)]
   Nj = [[sum(i) for i in zip(*Nij[:][j])] for j in range(pmax+1)]
   return u, Nij, Nj
 
@@ -180,14 +179,14 @@ def example5():
        (52.5444045251438, 42.8799268641912, -0.372905635604393),
        (52.7547311828766, 42.9295775362814, -0.373148784408123)]
   Uu = (0.0228378692889125,
-       0.0649893839528174,
-       0.130414237399236,
-       0.195679174703882,
-       0.260898113556269,
-       0.326065686455556,
-       0.391167888702703,
-       0.456323551413636,
-       0.521155975846261)
+        0.0649893839528174,
+        0.130414237399236,
+        0.195679174703882,
+        0.260898113556269,
+        0.326065686455556,
+        0.391167888702703,
+        0.456323551413636,
+        0.521155975846261)
   mult = (4, 2, 2, 2, 2, 2, 2, 2, 4)
   U = [Uu[i] for i in range(len(Uu)) for j in range(mult[i])]
 
@@ -205,9 +204,9 @@ def example5():
       C = b_spline_curve_with_knots(p, P, U)
       Cu = sample_half_open(C, U[0], U[-1])
     plot_b_spline_curve_with_knots(
-      Cu = Cu,
-      CU = sample_half_open_seq(C, Uu) if knots_cp else None,
-      P = P if knots_cp else None,
+      Cu=Cu,
+      CU=sample_half_open_seq(C, Uu) if knots_cp else None,
+      P=P if knots_cp else None,
       figure_id='N5 C')
 
     pylab.gca().set_zlim3d([-1, 0])
@@ -239,14 +238,14 @@ def example6():
        (52.5444045251438, 42.8799268641912, -0.372905635604393),
        (52.7547311828766, 42.9295775362814, -0.373148784408123)]
   Uu = (0.0228378692889125,
-       0.0649893839528174,
-       0.130414237399236,
-       0.195679174703882,
-       0.260898113556269,
-       0.326065686455556,
-       0.391167888702703,
-       0.456323551413636,
-       0.521155975846261)
+        0.0649893839528174,
+        0.130414237399236,
+        0.195679174703882,
+        0.260898113556269,
+        0.326065686455556,
+        0.391167888702703,
+        0.456323551413636,
+        0.521155975846261)
   mult = (4, 2, 2, 2, 2, 2, 2, 2, 4)
   U = [Uu[i] for i in range(len(Uu)) for j in range(mult[i])]
 
@@ -275,86 +274,86 @@ def example6():
 
 def example7():
   P = [(-69.99999999999, 6.23746531921, 119.99999999999),
- (-69.99999999999, 5.72567326271, 120.0),
- (-70.0, 5.2192123782, 120.0),
- (-70.0, 4.718082665681, 120.0),
- (-70.0, 4.222284125153, 120.0),
- (-70.0, 3.731816756617, 120.0),
- (-70.0, 3.246680560071, 120.0),
- (-70.0, 2.766875535516, 120.0),
- (-70.0, 2.292401682953, 120.0),
- (-70.0, 1.82325900238, 120.0),
- (-70.0, 1.359447493799, 120.0),
- (-70.0, 0.900967157208, 120.0),
- (-70.0, 0.447817992609, 120.0),
- (-69.99999999999, -1.642767914458, 119.99999999999),
- (-69.95823302652, -3.284128624962, 119.96005936915),
- (-69.87482030195, -4.920567121601, 119.88028704462),
- (-69.7502001661, -6.548567099244, 119.76113869291),
- (-69.58513326705, -8.164660004507, 119.60341679526),
- (-69.38069590753, -9.765475979336, 119.40825949383),
- (-69.13826152984, -11.34779669959, 119.17711816806),
- (-68.85947036564, -12.90861011093, 118.91172378914),
- (-68.54618721656, -14.44516705927, 118.61404198996),
- (-68.20044740283, -15.95503981856, 118.28621691953),
- (-67.82439084537, -17.43618251348, 117.93050381741),
- (-67.42018430873, -18.88699343893, 117.54919035943),
- (-66.38758251206, -22.29350540161, 116.57795367665),
- (-65.73413448053, -24.21919416036, 115.96554908806),
- (-65.03556391343, -26.07956263873, 115.31370192302),
- (-64.29648522575, -27.87744521951, 114.62724902124),
- (-63.52042791056, -29.61397650413, 113.91024118834),
- (-62.71277001846, -31.2871331673, 113.16847249966),
- (-61.87901674025, -32.89613508726, 112.4077395496),
- (-61.02226890253, -34.44424317029, 111.63151855295),
- (-60.14386048877, -35.93622309031, 110.841629897),
- (-59.24623340527, -37.37387103089, 110.04091803203),
- (-58.33313678246, -38.756819007, 109.23340236149),
- (-57.40516397009, -40.08965381341, 108.42014822445),
- (-55.01642244455, -43.34968716212, 106.34685334397),
- (-53.53813210335, -45.21002358427, 105.08230356996),
- (-52.03458081272, -46.96355473328, 103.81650090025),
- (-50.50977333246, -48.61777575741, 102.55504546095),
- (-48.96692322622, -50.17949288551, 101.30260097008),
- (-47.40801072014, -51.65517742458, 100.06277532323),
- (-45.83395649691, -53.05076391735, 98.838417665337),
- (-44.24537288755, -54.37123987567, 97.632189028576),
- (-42.64319994423, -55.62048722024, 96.446976549361),
- (-41.02853017217, -56.80167054344, 95.285780596074),
- (-39.40157208613, -57.91802439479, 94.15110945761),
- (-37.76099941739, -58.97317114245, 93.044667943398),
- (-33.51657488475, -61.52870256173, 90.285109332808),
- (-30.89322834847, -62.94313830978, 88.677041723595),
- (-28.23238814008, -64.22251443102, 87.15321189152),
- (-25.55002271787, -65.36600940426, 85.732620462342),
- (-22.80465037824, -66.39367032451, 84.407541386373),
- (-20.07652968241, -67.27260606721, 83.231827543651),
- (-17.27816204332, -68.0519427367, 82.167075623263),
- (-14.44812618974, -68.69718956814, 81.25538726298),
- (-11.58521735637, -69.2186257426, 80.51004437835),
- (-8.697808521544, -69.60868640648, 79.943540692506),
- (-5.807821595725, -69.86923851767, 79.563401742733),
- (-2.906442029202, -70.00000000001, 79.372539331945),
- (0.372271370757, -69.99999999999, 79.372539331937),
- (0.762465017147, -69.99999999999, 79.372539331936),
- (1.17058093917, -69.99999999999, 79.372539331935),
- (1.596619136825, -69.99999999999, 79.372539331934),
- (2.040579610114, -69.99999999999, 79.372539331932),
- (2.502462359036, -69.99999999999, 79.372539331931),
- (2.982267383591, -69.99999999998, 79.37253933193),
- (3.479994683778, -69.99999999998, 79.372539331929),
- (3.995644259599, -69.99999999998, 79.372539331927),
- (4.529216111052, -69.99999999998, 79.372539331926),
- (5.080710238139, -69.99999999998, 79.372539331925),
- (5.650126640858, -69.99999999997, 79.372539331923),
- (6.23746531921, -69.99999999997, 79.372539331922)]
+       (-69.99999999999, 5.72567326271, 120.0),
+       (-70.0, 5.2192123782, 120.0),
+       (-70.0, 4.718082665681, 120.0),
+       (-70.0, 4.222284125153, 120.0),
+       (-70.0, 3.731816756617, 120.0),
+       (-70.0, 3.246680560071, 120.0),
+       (-70.0, 2.766875535516, 120.0),
+       (-70.0, 2.292401682953, 120.0),
+       (-70.0, 1.82325900238, 120.0),
+       (-70.0, 1.359447493799, 120.0),
+       (-70.0, 0.900967157208, 120.0),
+       (-70.0, 0.447817992609, 120.0),
+       (-69.99999999999, -1.642767914458, 119.99999999999),
+       (-69.95823302652, -3.284128624962, 119.96005936915),
+       (-69.87482030195, -4.920567121601, 119.88028704462),
+       (-69.7502001661, -6.548567099244, 119.76113869291),
+       (-69.58513326705, -8.164660004507, 119.60341679526),
+       (-69.38069590753, -9.765475979336, 119.40825949383),
+       (-69.13826152984, -11.34779669959, 119.17711816806),
+       (-68.85947036564, -12.90861011093, 118.91172378914),
+       (-68.54618721656, -14.44516705927, 118.61404198996),
+       (-68.20044740283, -15.95503981856, 118.28621691953),
+       (-67.82439084537, -17.43618251348, 117.93050381741),
+       (-67.42018430873, -18.88699343893, 117.54919035943),
+       (-66.38758251206, -22.29350540161, 116.57795367665),
+       (-65.73413448053, -24.21919416036, 115.96554908806),
+       (-65.03556391343, -26.07956263873, 115.31370192302),
+       (-64.29648522575, -27.87744521951, 114.62724902124),
+       (-63.52042791056, -29.61397650413, 113.91024118834),
+       (-62.71277001846, -31.2871331673, 113.16847249966),
+       (-61.87901674025, -32.89613508726, 112.4077395496),
+       (-61.02226890253, -34.44424317029, 111.63151855295),
+       (-60.14386048877, -35.93622309031, 110.841629897),
+       (-59.24623340527, -37.37387103089, 110.04091803203),
+       (-58.33313678246, -38.756819007, 109.23340236149),
+       (-57.40516397009, -40.08965381341, 108.42014822445),
+       (-55.01642244455, -43.34968716212, 106.34685334397),
+       (-53.53813210335, -45.21002358427, 105.08230356996),
+       (-52.03458081272, -46.96355473328, 103.81650090025),
+       (-50.50977333246, -48.61777575741, 102.55504546095),
+       (-48.96692322622, -50.17949288551, 101.30260097008),
+       (-47.40801072014, -51.65517742458, 100.06277532323),
+       (-45.83395649691, -53.05076391735, 98.838417665337),
+       (-44.24537288755, -54.37123987567, 97.632189028576),
+       (-42.64319994423, -55.62048722024, 96.446976549361),
+       (-41.02853017217, -56.80167054344, 95.285780596074),
+       (-39.40157208613, -57.91802439479, 94.15110945761),
+       (-37.76099941739, -58.97317114245, 93.044667943398),
+       (-33.51657488475, -61.52870256173, 90.285109332808),
+       (-30.89322834847, -62.94313830978, 88.677041723595),
+       (-28.23238814008, -64.22251443102, 87.15321189152),
+       (-25.55002271787, -65.36600940426, 85.732620462342),
+       (-22.80465037824, -66.39367032451, 84.407541386373),
+       (-20.07652968241, -67.27260606721, 83.231827543651),
+       (-17.27816204332, -68.0519427367, 82.167075623263),
+       (-14.44812618974, -68.69718956814, 81.25538726298),
+       (-11.58521735637, -69.2186257426, 80.51004437835),
+       (-8.697808521544, -69.60868640648, 79.943540692506),
+       (-5.807821595725, -69.86923851767, 79.563401742733),
+       (-2.906442029202, -70.00000000001, 79.372539331945),
+       (0.372271370757, -69.99999999999, 79.372539331937),
+       (0.762465017147, -69.99999999999, 79.372539331936),
+       (1.17058093917, -69.99999999999, 79.372539331935),
+       (1.596619136825, -69.99999999999, 79.372539331934),
+       (2.040579610114, -69.99999999999, 79.372539331932),
+       (2.502462359036, -69.99999999999, 79.372539331931),
+       (2.982267383591, -69.99999999998, 79.37253933193),
+       (3.479994683778, -69.99999999998, 79.372539331929),
+       (3.995644259599, -69.99999999998, 79.372539331927),
+       (4.529216111052, -69.99999999998, 79.372539331926),
+       (5.080710238139, -69.99999999998, 79.372539331925),
+       (5.650126640858, -69.99999999997, 79.372539331923),
+       (6.23746531921, -69.99999999997, 79.372539331922)]
   Uu = (-3.932977778518,
- 1.445001333941e-14,
- 14.427668850884,
- 34.626262491172,
- 65.717581403178,
- 114.40570375563,
- 120.64191760942)
+        1.445001333941e-14,
+        14.427668850884,
+        34.626262491172,
+        65.717581403178,
+        114.40570375563,
+        120.64191760942)
   mult = (14, 12, 12, 12, 12, 12, 14)
   U = [Uu[i] for i in range(len(Uu)) for j in range(mult[i])]
 
@@ -376,3 +375,4 @@ def example7():
 
 if __name__ == "__main__":
   example7()
+  pylab.show()
diff --git a/examples/tui.py b/examples/tui.py
new file mode 100755
index 0000000..973cecb
--- /dev/null
+++ b/examples/tui.py
@@ -0,0 +1,193 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""Example tui.
+
+:Date: 2020-01-12
+
+.. module:: tui
+  :platform: *nix, Windows
+  :synopsis: Example tui.
+
+.. moduleauthor:: Daniel Weschke 
+"""
+
+import curses
+import locale
+from pylib.data import seq
+from pylib.function import sine_wave, cosine_wave, hypotrochoid, to_str
+from pylib.tui import TUI
+
+locale.setlocale(locale.LC_ALL, '')
+CODE = locale.getpreferredencoding()
+
+def standard_text(window):
+  window.text(
+    "1 - Show test page\n" +
+    "2 - Show Hypotrochoid example\n" +
+    "h - Show help page\n" +
+    "q - Exit", 1, 2)
+
+def help_text(window, tui, str_width_height):
+  screen_height, screen_width = window.getmaxyx()
+  last_screen_row = screen_height - 1
+
+  tui.color_table()  # print colors
+
+  window.text("screen width and height", 1, last_screen_row-3)
+  window.text("\u2502", 3, last_screen_row-2)  # \u2502
+  window.text("\u2502", 3, last_screen_row-1)  # \u2193 v
+
+  window.text("last pressed key as Unicode code point", len(str_width_height)+2, last_screen_row-2)
+  window.text("\u2502", 1+len(str_width_height)+1, last_screen_row-1)
+
+  num_reloads = "number of screen reloads\u256e"
+  # screen_width-1-len(num_reloads.encode('utf-16'))//2
+  window.text(num_reloads, screen_width-1-len(num_reloads), last_screen_row-1)
+
+def test_text(window):
+  window.text("Test page", 1, 2)
+
+def full_text(window, t):
+  #window.clear()
+  screen_height, screen_width = window.getmaxyx()
+
+  # Sine
+  f = sine_wave(A=0.5, k=0.1, D=0.5)
+  frame = to_str(f, x_0=0, x_1=1, h=screen_height-2, w=screen_width, t=t)
+
+  # Turtle
+  import drawille
+  turtle = drawille.Turtle()
+  for _ in range(36):
+    turtle.right(10 + t)
+    for _ in range(0, 36):
+      turtle.right(10)
+      turtle.forward(8)
+  frame = turtle.frame()
+  # size for forward 1: width 11+1, height 6
+  # size for forward 2: width 23+1, height 12
+  # size for forward 5: width 57+1, height 30
+  # size for forward 6: width 69+1, height 36
+  # size for forward 10: width 114+1, height 58
+  #                  n        12*n         6*n
+
+  # Hypotrochoid
+  demo = 2
+  c = drawille.Canvas()
+  R = 20
+  r = 6
+  d = 30
+  if demo == 1:
+    r = int(t/50)%19+1
+    x, y, theta = hypotrochoid(R, r, d)
+    for i in seq(0, theta[1]*0.98, theta[1]/10000):
+      c.set(x(i+t), y(i+t))
+    a = R+d+1 # R-r+d+1
+    frame = c.frame(min_x=-a, max_x=a, min_y=-a, max_y=a)
+  if demo == 2:
+    d = int(t)%21
+    x, y, theta = hypotrochoid(R, r, d)
+    for i in seq(0, theta[1]*0.98, theta[1]/5000):
+      c.set(x(i+t), y(i+t))
+    a = 2*R # R-r+d+1
+    frame = c.frame(min_x=-a, max_x=a, min_y=-a, max_y=a)
+
+  window.text(frame, padding_top=1, color_pair=10)
+  window.text("R=%2s r=%2s d=%2s" % (R, r, d), 1, int(a/2)+2)
+
+def win_charts_line(window, f_list, x_0, x_1, w, t, color_pairs, densities):
+  win_chart_line, _ = window.textbox(height=8, width=52, y=9, x=5, borders=True)
+  # width 100 pixel / 2 pixels/column = 50 columns
+  for f, color_pair, density in zip(f_list, color_pairs, densities):
+    frame = to_str(f, x_0=x_0, x_1=x_1, h=6, w=w, t=t, density=density)
+    win_chart_line.text(frame, color_pair=color_pair)
+
+def win_chart_histogram(window, f, x_0, x_1, w, t):
+  newwin2, _ = window.textbox(height=4, width=52, y=9+8, x=5, borders=True)
+
+  #frame2 = function_frame(f, x_0=x_0, x_1=x_1, h=2, w=w, t=t, char_set="histogram")
+  frame2 = to_str(f, x_0=x_0, x_1=x_1, h=2, w=w, t=t, char_set="histogram")
+  newwin2.text(frame2, color_pair=3)
+  frame3 = to_str(f, x_0=x_0, x_1=x_1, h=2, w=w, t=t, density=0.5, char_set="histogram")
+  newwin2.text(frame3, color_pair=4)
+
+def main(delay=1):
+  """
+  no window change for mouse events and resize events.
+  """
+  tui = TUI(delay)
+  initscr = tui.initscr
+  try:
+    tui.last_pressed_ch = 0                                                        # getch() Note that the integer returned does not have to be in ASCII range: function keys, keypad keys and so on return numbers higher than 256.
+    tui.last_pressed_mouse_ch = 0
+    i = 1
+    while True:
+      tui.clear()
+
+      screen_height, screen_width = initscr.getmaxyx()
+      str_width_height = str(screen_width) + 'x' + str(screen_height)          # width and height of the screen
+      footer_left = [str_width_height, str(tui.last_pressed_ch)]                   # and last pressed key as char integer ( Unicode code point)
+      i += 1                                                                   # number of screen reloads
+      initscr.border("Python curses in action!", footer_left, str(i))
+
+      if tui.last_pressed_ch == ord('1'):
+        test_text(initscr)
+
+      elif tui.last_pressed_ch == ord('2'):
+        full_text(initscr, i)
+
+      elif tui.last_pressed_ch == ord('h'):
+        help_text(initscr, tui, str_width_height)
+
+      elif tui.last_pressed_ch == ord('q'):
+        break
+
+      else:
+        standard_text(initscr)
+
+        x_0 = 0
+        x_1 = 1  # TODO
+        w = 50
+        t = i/100
+
+        # define function normed to the range of [0, 1]
+        y_1 = sine_wave(A=.5, k=.1, D=.5)
+        y_1_2 = sine_wave(A=.5, k=.1, f=1+1/3, phi=30, D=.5, degree=True)
+        y_1_3 = sine_wave(A=.5, k=.1, f=1+2/3, phi=60, D=.5, degree=True)
+        y_2 = cosine_wave(A=.5, k=.1, f=2, D=.5)
+        win_charts_line(initscr, [y_1, y_1_2, y_1_3, y_2], x_0, x_1, w, t, [209, 215, 221, 227], [5, 5, 5, 5])
+        #win_charts_line(initscr, [y_1, y_1_2, y_1_3, y_2], x_0, x_1, w, t, [10, 7, 7, 7], [5, 1, 1, 1])
+        #y_2 = cosine_wave(A=0.5, k=0.2, f=2, D=0.5)
+        #win_charts_line(initscr, [y_1, y_2], x_0, x_1, w, t, [10, 7], [5, 1])
+        win_chart_histogram(initscr, y_1, x_0, x_1, w, t)
+
+        # mouse event has occurred
+        if tui.last_pressed_mouse_ch == curses.KEY_MOUSE:
+          try:
+            _, mx, my, _, _ = curses.getmouse()
+            initscr.text("Mouse pos " + str(mx) + " " + str(my), 1, 6)
+            initscr.text(initscr.instr(my, mx, 5), mx, my, color_pair=5)
+          except curses.error:
+            pass
+
+      # std content
+      # cursor position (last addstr is cursor position)
+      if tui.cursor_visibility > 0:
+        initscr.text("", 1, 6)
+
+      tui.refresh()  # update the screen
+      tui.getch()
+
+  except Exception as e:
+    import traceback
+    print('\n'.join(traceback.format_exception(*sys.exc_info())))
+
+  finally:
+    tui.end()
+
+if __name__ == '__main__':
+  import sys
+  if len(sys.argv) > 1:
+    main(sys.argv[1])
+  else:
+    main()
diff --git a/pylib/__init__.py b/pylib/__init__.py
index 84f9702..e946c39 100644
--- a/pylib/__init__.py
+++ b/pylib/__init__.py
@@ -6,7 +6,8 @@ project_dir = os.path.abspath(os.path.dirname(__file__))
 parent_dir = os.path.dirname(project_dir)
 vendor_dir = os.path.join(parent_dir, 'vendor')
 
-sys.path.append(vendor_dir)
+if vendor_dir not in sys.path:
+  sys.path.append(vendor_dir)
 
 # Now you can import any library located in the "vendor" folder!
 # import drawille
diff --git a/pylib/geometry_plot_pylab.py b/pylib/geometry_plot_pylab.py
index e4bb2b6..6258bcb 100644
--- a/pylib/geometry_plot_pylab.py
+++ b/pylib/geometry_plot_pylab.py
@@ -145,7 +145,37 @@ def cad_wireframe(world, centering=True):
 
   plot_post(ax)
 
-  def press(event, world, lps):
+  #  'rotate: ←left, right, up, down, ctrl+left, ctrl+right\n' +
+  #  'pan:    shift+left, shift+right, shift+up, shift+down\n' +
+  #  'zoom:   ctrl+up, ctrl+down\n' +
+  #  'view:   f (front), l (left), r (right), t (top), b (bottom)\n' +
+  #  '        i (isometric), d (dimetric)',
+  h_open = pylab.text(
+    0+.01, 1-.015,
+    'rotate: [←], [→], [↑], [↓], [Ctrl][←], [Ctrl][→]\n' +
+    'pan:    [Shift][←], [Shift][→], [Shift][↑], [Shift][↓]\n' +
+    'zoom:   [Ctrl][↑], [Ctrl][↓]\n' +
+    'view:   [f]ront, [l]eft, [r]ight, [t]op, [b]ottom\n' +
+    '        [i]sometric, [d]imetric',
+    color='#2280c0',
+    horizontalalignment='left',
+    verticalalignment='top',
+    transform=fig.transFigure,
+    bbox=dict(facecolor='black', edgecolor='#196090', alpha=0.5),
+    family='monospace'
+    )
+  h_close = pylab.text(
+    0+.01, 1-.015, '[h]elp',
+    color='#2280c0',
+    horizontalalignment='left',
+    verticalalignment='top',
+    transform=fig.transFigure,
+    bbox=dict(facecolor='black', edgecolor='#196090', alpha=0.5),
+    family='monospace',
+    visible=False
+    )
+
+  def press(event, world, lps, h_open, h_close):
     #print('key pressed:', event.key)
     #sys.stdout.flush()
     if event.key in [
@@ -215,6 +245,10 @@ def cad_wireframe(world, centering=True):
         world.scale(0.9)
       for i, j in zip(lps, world.wireframes_xy()):
         i.set_data(j)
+    if event.key == 'h':
+      visible = h_open.get_visible()
+      h_open.set_visible(not visible)
+      h_close.set_visible(visible)
     fig.canvas.draw()
 
   def onresize(event, w):
@@ -223,26 +257,8 @@ def cad_wireframe(world, centering=True):
     pylab.ylim((-r, r))
 
   fig.canvas.mpl_connect('key_press_event',
-                         lambda event: press(event, world, lps))
+                         lambda event: press(event, world, lps,
+                                             h_open, h_close))
   fig.canvas.mpl_connect('resize_event',
                          lambda event: onresize(event, world))
-
-  #  'rotate: ←left, right, up, down, ctrl+left, ctrl+right\n' +
-  #  'pan:    shift+left, shift+right, shift+up, shift+down\n' +
-  #  'zoom:   ctrl+up, ctrl+down\n' +
-  #  'view:   f (front), l (left), r (right), t (top), b (bottom)\n' +
-  #  '        i (isometric), d (dimetric)',
-  pylab.text(
-    0+.01, 1-.015,
-    'rotate: [←], [→], [↑], [↓], [Ctrl][←], [Ctrl][→]\n' +
-    'pan:    [Shift][←], [Shift][→], [Shift][↑], [Shift][↓]\n' +
-    'zoom:   [Ctrl][↑], [Ctrl][↓]\n' +
-    'view:   [f]ront, [l]eft, [r]ight, [t]op, [b]ottom\n' +
-    '        [i]sometric, [d]imetric',
-    horizontalalignment='left',
-    verticalalignment='top',
-    transform=fig.transFigure,
-    bbox=dict(facecolor='black', alpha=0.5),
-    family='monospace'
-    )
   pylab.show()
diff --git a/pylib/helper.py b/pylib/helper.py
index 4c4fce1..b346219 100755
--- a/pylib/helper.py
+++ b/pylib/helper.py
@@ -10,6 +10,7 @@
 
 .. moduleauthor:: Daniel Weschke 
 """
+import os
 import time
 from contextlib import ContextDecorator
 
@@ -46,3 +47,43 @@ class timeit(ContextDecorator):
     elapsed_time_ms = (time.time() - self.start_time) * 1000
     print('{:s} took {:.3f} ms'.format(self.description, elapsed_time_ms))
     return False
+
+class cd:
+  """Context manager for changing the current working directory
+
+  :param new_path: the directory to change into
+  :type new_path: string
+
+  :Example:
+
+  ::
+
+    # enter the directory and run some code:
+    with cd("~/tmp"):
+      # we are now in ~/tmp
+      # code
+    # outside the context manager we are back where we started.
+  """
+  def __init__(self, new_path):
+    self.new_path = os.path.expanduser(new_path)
+
+  def __enter__(self):
+    self.saved_path = os.getcwd()
+    os.chdir(self.new_path)
+
+  def __exit__(self, etype, value, traceback):
+    os.chdir(self.saved_path)
+
+def run_file(file_name):
+  """Run a file.
+
+  Inside a pythin interpreter it changes to the directory of the
+  file and after excuting the file it changes back to the working
+  directory before.
+
+  :param file_name: the file to execute
+  :type file_name: string
+  """
+  workdir = os.path.dirname(os.path.abspath(file_name))
+  with cd(workdir):
+    exec(open(file_name).read())
diff --git a/pylib/mathematics.py b/pylib/mathematics.py
index a820b7c..3a6f360 100644
--- a/pylib/mathematics.py
+++ b/pylib/mathematics.py
@@ -633,7 +633,7 @@ class matrix(list):
   """
 
   def __getitem__(self, index):
-    """
+    r"""
     For index return value, for range return new vector object.
 
     :Example:
@@ -790,7 +790,7 @@ class matrix(list):
     :Example:
 
     >>> m = matrix.zeros(3, 3)
-    >>> print(m)\
+    >>> print(m)
     [[0.0, 0.0, 0.0], [0.0, 0.0, 0.0], [0.0, 0.0, 0.0]]
     """
     return matrix([[0. for i in range(n)] for j in range(m)])
diff --git a/pylib/tui.py b/pylib/tui.py
new file mode 100644
index 0000000..43cb122
--- /dev/null
+++ b/pylib/tui.py
@@ -0,0 +1,360 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""TUI module.
+
+:Date: 2020-01-10
+
+.. module:: tui
+  :platform: *nix, Windows
+  :synopsis: TUI module.
+
+.. moduleauthor:: Daniel Weschke 
+"""
+# TODO: two classes to distinguish between curses (main tui) and
+#       window (to handle sub windows)?
+# TODO: width resizing, min width now 6 because of text and border
+# TODO: height resizing, min height
+import sys
+import curses
+
+
+def newwin(height, width, y, x):
+  win = Window()
+  win.window = curses.newwin(height, width, y, x)
+  return win
+
+
+class StdOutWrapper:
+  """Send print to stdout (print to the standard console).
+
+  usage:
+
+  ::
+
+    # catch all prints into StdOutWrapper
+    mystdout = StdOutWrapper()
+    sys.stdout = mystdout
+    sys.stderr = mystdout
+
+    # begin curses (curses.initscr())
+
+    # do your stuff here
+    # print("foo")
+    # you can also output mystdout.get_text() in a ncurses widget in
+    # runtime
+
+    # end curses (curses.endwin())
+
+    # go back to normal state and print all catched prints to stdout
+    sys.stdout = sys.__stdout__
+    sys.stderr = sys.__stderr__
+    sys.stdout.write(mystdout.get_text())
+
+  source:
+    https://stackoverflow.com/a/14010948
+  """
+  text = ""
+  def write(self, txt):
+    self.text += txt
+    self.text = '\n'.join(self.text.split('\n')[-30:])
+  def get_text(self):
+    return '\n'.join(self.text.split('\n'))
+  #def get_text(self,beg,end):
+  #    return '\n'.join(self.text.split('\n')[beg:end])
+
+
+class TUI:
+  """TUI text-based user interface
+
+  initscr is the encapsulation window object of the stdscr
+  stdsc is the curses.initscr
+  """
+
+  def __init__(self, delay=5):
+    """
+    :param delay: sets the curses.halfdelay, value between 1 and 255.
+    :param type: int
+    """
+    if not isinstance(delay, int):
+      try:
+        delay = int(delay)
+      except ValueError:
+        print("TUI(delay)")
+        print("Could not convert the argument to an integer.")
+
+    # catch all prints into StdOutWrapper
+    self.stdout = StdOutWrapper()
+    sys.stdout = self.stdout
+    sys.stderr = self.stdout
+
+    # Define the appearance of some interface elements
+    hotkey_attr = curses.A_BOLD | curses.A_UNDERLINE
+    menu_attr = curses.A_NORMAL
+
+    self.initscr = Window()
+    self.initscr.initscr()
+    self.stdscr = self.initscr.window
+    #print(type(self.stdscr))
+    #print(type(self.initscr))
+
+    try:
+      curses.cbreak()
+      curses.halfdelay(delay)              # How many tenths of a second are waited, from 1 to 255
+      #stdscr.nodelay(1)
+      curses.noecho()
+      self.cursor_visibility = 0           # Set the cursor state. visibility can be set to 0, 1, or 2, for invisible, normal, or very visible.
+      curses.curs_set(self.cursor_visibility)
+      self.stdscr.keypad(1)
+      curses.mousemask(1)                  # activate mouse events
+
+      # init colors
+      if curses.has_colors():
+        curses.start_color()  # initializes 8 basic colors. 0:black, 1:red, 2:green, 3:yellow, 4:blue, 5:magenta, 6:cyan, and 7:white.
+        curses.use_default_colors()
+        for i in range(0, curses.COLORS):
+          curses.init_pair(i + 1, i, -1)  # Color pair 0 is hard-wired to white on black, and cannot be changed.
+    except: pass
+
+    self.last_pressed_ch = 0                                                        # getch() Note that the integer returned does not have to be in ASCII range: function keys, keypad keys and so on return numbers higher than 256.
+    self.last_pressed_mouse_ch = 0
+
+  def refresh(self):
+    self.initscr.refresh()  # update the screen
+
+  def getch(self):
+    # keep last key value
+    last_pressed_ch_current = self.initscr.getch()
+    if last_pressed_ch_current != curses.ERR:
+      # keep last key while window resizing
+      if last_pressed_ch_current == curses.KEY_MOUSE:
+        self.last_pressed_mouse_ch = last_pressed_ch_current
+      if last_pressed_ch_current in [curses.KEY_MOUSE, curses.KEY_RESIZE]:
+        pass
+      else:
+        self.last_pressed_ch = last_pressed_ch_current
+
+  def color_table(self, window=None):
+    """Print all available colors with default background.
+    Check if curses.has_colors() is True.
+    """
+    # TODO: position
+    # FIXME: use own text method?
+    # FIXME: build full str first and then print?
+    if not curses.has_colors():
+      return
+    if window is None:
+      window = self.stdscr
+
+    window.addstr(2, 1, '{0} colors available'.format(curses.COLORS))
+    if curses.can_change_color():
+      window.addstr(' (can change color: {0})'.format(curses.can_change_color()))
+    _, maxx = window.getmaxyx()
+    step_size = 4
+    maxx = maxx - maxx % step_size
+    x = 0
+    y = 3
+    try:
+      for i in range(0, curses.COLORS):
+        window.addstr(y, x, '{0:{1}}'.format(i, step_size), curses.color_pair(i))
+        x = (x + step_size) % maxx
+        if x == 0:
+          y += 1
+    except:
+      # End of screen reached
+      pass
+
+  def color_def(self):
+    if curses.can_change_color():  # if True curses.init_color(color_number, r, g, b) can be used
+      pass
+      # changes colors for the terminal also after closing the program.
+      #curses.color_content(0)
+      #tmp = curses.color_content(1)
+      #print(curses.color_content(1))
+      #curses.init_color(0, 1000, 0, 0)  # color_number = init_pair number - 1 (maybe because init_pair number 0 is hard-wired and not changeable)
+      #curses.init_color(1, 1000, 500, 1000)
+      #print(curses.color_content(1))
+      #curses.init_color(1, *tmp)
+      #print(curses.color_content(1))
+
+  def clear(self):
+    self.stdscr.clear()
+
+  def end(self):
+    """clean up"""
+    self.stdscr.clear()
+    curses.nocbreak()
+    self.stdscr.keypad(0)
+    curses.echo()
+    curses.endwin()
+
+    # go back to normal state and print all catched prints to stdout
+    sys.stdout = sys.__stdout__
+    sys.stderr = sys.__stderr__
+    sys.stdout.write(self.stdout.get_text())
+
+
+class Window:
+  """Window
+  """
+  def __init__(self):
+    self.window = None
+
+  def initscr(self):
+    self.window = curses.initscr()
+
+  def derwin(self, height, width, y, x):
+    win = Window()
+    win.window = self.window.derwin(height, width, y, x)
+    return win
+
+  def clear(self):
+    return self.window.clear()
+
+  def getmaxyx(self):
+    return self.window.getmaxyx()
+
+  def getch(self):
+    return self.window.getch()
+
+  def instr(self, y, x, n):
+    return self.window.instr(y, x, n).decode()
+
+  def text(self, string, padding_left=0, padding_top=0, attribute=0, color_pair=0):
+    r"""Test to screen. If multiline than keep the x position for
+    each new line.
+
+    :Example:
+
+    ::
+
+      text(stdscr, 2, 1, "1 - Show test page")
+      text(stdscr, 3, 1, "h - Show help page")
+      text(stdscr, 4, 1, "q - Exit")
+
+      text(stdscr, 2, 1,
+           "1 - Show test page\\n" +
+           "h - Show help page\\n" +
+           "q - Exit")
+
+    .. note::
+      Writing in the last char of the window (last row bottom and
+      last column right) is suppressed
+    """
+    win_height, win_width = self.window.getmaxyx()
+    if win_width-padding_left < 2:  # unicode can have 2 char width
+      return
+    yi = padding_top
+    #for row in string.split("\n"):
+    #  window.addnstr(yi, x, row, win_width-x-1, curses.color_pair(9))  # 5
+    #  yi += 1
+    for row in string.split("\n"):  # TODO: os.linesep?
+      xi = padding_left
+      for char in row:
+        # write only inside the window
+        if not yi >= win_height and not xi >= win_width:
+          # do not write in the last char of window (last row bottom and last column right)
+          # unicodes may use multiple chars, this will raise an error for the last char in the window
+          if yi == win_height-1 and xi >= win_width-1:
+            break
+          #if yi == win_height-1 and xi >= win_width-1:
+          #  try:
+          #    char.encode("ascii")
+          #  except UnicodeEncodeError:
+          #    break
+
+          # dont add str if empty braille char or simple space character
+          if char != chr(0x2800) and char != " " and xi < win_width and yi < win_height:
+            self.window.addstr(yi, xi, char, attribute|curses.color_pair(color_pair))
+        xi += 1
+      yi += 1
+
+  def border(self, title="", footer_left="", footer_right="", style="horizontal"):
+    """Set border around the window with optional title and footer
+    labels.
+
+    :param window: the window to draw a border
+    :type window: curses.window
+    :param title: the title for the window (default = "")
+    :type title: str
+    :param footer_left: the footer label (default = ""). If footer_left
+      is a list than every element of the list will be printed sperated
+      by one column. This is useful to not overwright the border with a
+      space character.
+    :type footer_left: str or list
+    """
+    win_height, win_width = self.window.getmaxyx()
+    if win_width < 3:
+      return
+
+    if isinstance(style, str):
+      if style == "horizontal":
+        self.window.border(
+          ' ',
+          ' ',
+          curses.ACS_HLINE,
+          curses.ACS_HLINE,
+          curses.ACS_HLINE,
+          curses.ACS_HLINE,
+          curses.ACS_HLINE,
+          curses.ACS_HLINE,
+        )
+      elif style == "full":
+        self.window.border(0, 0, 0, 0, 0, 0, 0, 0, )
+    else:  # list
+      self.window.border(*style)
+
+    if title:
+      self.text(title, 1)
+
+    if footer_left:
+      last_win_row = win_height - 1
+      if isinstance(footer_left, str):
+        self.text(footer_left, 1, last_win_row)
+      else:  # list
+        pos = 1
+        for footer_left_i in footer_left:
+          self.text(footer_left_i, pos, win_height-1)
+          pos += len(footer_left_i)+1
+
+    if footer_right:
+      self.text(footer_right, win_width - 1 - len(footer_right), last_win_row)
+
+  def textbox(self, height, width, y, x, borders=False):
+    """Add sub window.
+
+    :param parent_window: the parent window
+    :type parent_window: curses.window
+    :param height: the height of the sub window. The reference point of
+      the sub window is the top left corner.
+    :type height: int
+    :param width: the width of the sub window. The reference point of
+      the sub window is the top left corner.
+    :type width: int
+    :param y: the y coordinate (position) of the sub window. Start from
+      the top.
+    :type y: int
+    :param x: the x coordinate (position) of the sub window. Start from
+      the left.
+    :returns: the sub window content and decoration
+    :rtype: (curses.window, curses.window)
+    """
+    # TODO: not to work with two window object but one with the
+    #       possibility to access the derwin(s). Either self.derwins
+    #       or another DoubleWindow class for border and text or do it
+    #       in this class?
+    screen_height, screen_width = self.window.getmaxyx()
+    newwin_width = screen_width-x if x+width > screen_width else width
+    newwin_height = screen_height-y if y+height > screen_height else height
+    if newwin_width > 0 and newwin_height > 0:
+      win = self.derwin(newwin_height, newwin_width, y, x)
+      if borders:
+        win.border(style="full")
+        if newwin_width-2 > 0 and newwin_height-1 > 0:
+          subwin = win.derwin(newwin_height-1, newwin_width-2, 1, 1)
+          return subwin, win  # text and border
+        return newwin(1, 1, 0, 0), win  # only border, no text (top left 1 char)
+      return win, newwin(1, 1, 0, 0)  # only text, no border (top left 1 char)
+    return newwin(1, 1, 0, 0), newwin(1, 1, 0, 0)  # no border and no text (top left 1 char)
+
+  def refresh(self):
+    self.window.refresh()