Python curses.has_colors() Examples

def __init__(self):
        #curses.use_default_colors()
        self.define_colour_numbers()
        self._defined_pairs = {}
        self._names         = {}
        try:
            self._max_pairs = curses.COLOR_PAIRS - 1
            do_color = True
        except AttributeError:
            # curses.start_color has failed or has not been called
            do_color = False
            # Disable all color use across the application
            disableColor()
        if do_color and curses.has_colors():
            self.initialize_pairs()
            self.initialize_names() 

def findPair(self, caller, request='DEFAULT'):
        if not curses.has_colors() or npysGlobalOptions.DISABLE_ALL_COLORS:
            return False

        if request=='DEFAULT':
            request = caller.color
        # Locate the requested colour pair.  Default to default if not found.
        try:
            pair = self._defined_pairs[self._names[request]]
        except:
            pair = self._defined_pairs[self._names['DEFAULT']]

        # now make the actual attribute
        color_attribute = curses.color_pair(pair[0])
        
        return color_attribute 

def __init__(self):
        #curses.use_default_colors()
        self.define_colour_numbers()
        self._defined_pairs = {}
        self._names         = {}
        try:
            self._max_pairs = curses.COLOR_PAIRS - 1
            do_color = True
        except AttributeError:
            # curses.start_color has failed or has not been called
            do_color = False
            # Disable all color use across the application
            disableColor()
        if do_color and curses.has_colors():
            self.initialize_pairs()
            self.initialize_names() 

def __init__(self):
        #curses.use_default_colors()
        self.define_colour_numbers()
        self._defined_pairs = {}
        self._names         = {}
        try:
            self._max_pairs = curses.COLOR_PAIRS - 1
            do_color = True
        except AttributeError:
            # curses.start_color has failed or has not been called
            do_color = False
            # Disable all color use across the application
            disableColor()
        if do_color and curses.has_colors():
            self.initialize_pairs()
            self.initialize_names() 

def findPair(self, caller, request='DEFAULT'):
        if not curses.has_colors() or npysGlobalOptions.DISABLE_ALL_COLORS:
            return False

        if request=='DEFAULT':
            request = caller.color
        # Locate the requested colour pair.  Default to default if not found.
        try:
            pair = self._defined_pairs[self._names[request]]
        except:
            pair = self._defined_pairs[self._names['DEFAULT']]

        # now make the actual attribute
        color_attribute = curses.color_pair(pair[0])
        
        return color_attribute 

def findPair(self, caller, request='DEFAULT'):
        if not curses.has_colors() or npysGlobalOptions.DISABLE_ALL_COLORS:
            return False

        if request=='DEFAULT':
            request = caller.color
        # Locate the requested colour pair.  Default to default if not found.
        try:
            pair = self._defined_pairs[self._names[request]]
        except:
            pair = self._defined_pairs[self._names['DEFAULT']]

        # now make the actual attribute
        color_attribute = curses.color_pair(pair[0])
        
        return color_attribute 

def findPair(self, caller, request='DEFAULT'):
        if not curses.has_colors() or npysGlobalOptions.DISABLE_ALL_COLORS:
            return False

        if request=='DEFAULT':
            request = caller.color
        # Locate the requested colour pair.  Default to default if not found.
        try:
            pair = self._defined_pairs[self._names[request]]
        except:
            pair = self._defined_pairs[self._names['DEFAULT']]

        # now make the actual attribute
        color_attribute = curses.color_pair(pair[0])
        
        return color_attribute 

def __init__(self):
        #curses.use_default_colors()
        self.define_colour_numbers()
        self._defined_pairs = {}
        self._names         = {}
        try:
            self._max_pairs = curses.COLOR_PAIRS - 1
            do_color = True
        except AttributeError:
            # curses.start_color has failed or has not been called
            do_color = False
            # Disable all color use across the application
            disableColor()
        if do_color and curses.has_colors():
            self.initialize_pairs()
            self.initialize_names() 

def do_colors(self):
        "Returns True if the widget should try to paint in coloour."
        if curses.has_colors() and not GlobalOptions.DISABLE_ALL_COLORS:
            return True
        else:
            return False 

def display(self, clear=False):
        #APPLICATION_THEME_MANAGER.setTheme(self)
        if curses.has_colors() and not npysGlobalOptions.DISABLE_ALL_COLORS:
            self.curses_pad.attrset(0)
            color_attribute = self.theme_manager.findPair(self, self.color)
            self.curses_pad.bkgdset(' ', color_attribute)
            self.curses_pad.attron(color_attribute)
        self.curses_pad.erase()
        self.draw_form()
        for w in [wg for wg in self._widgets__ if wg.hidden]:
            w.clear()
        for w in [wg for wg in self._widgets__ if not wg.hidden]:
            w.update(clear=clear)

        self.refresh() 

def draw_form(self):
        if self.framed:
            if curses.has_colors() and not GlobalOptions.DISABLE_ALL_COLORS:
                self.curses_pad.attrset(0)
                self.curses_pad.bkgdset(' ', curses.A_NORMAL | self.theme_manager.findPair(self, self.color))
            self.curses_pad.border()
            self.draw_title_and_help() 

def __init__(self, map_name='world', map_conf=None, window=None, encoding=None):
        if map_conf is None:
            map_conf = MAPS[map_name]
        self.map = map_conf['data']
        self.coords = map_conf['coords']
        self.corners = map_conf['corners']
        if window is None:
            window = curses.newwin(0, 0)
        self.window = window

        self.data = []
        self.data_timestamp = None

        # JSON contents _should_ be UTF8 (so, python internal unicode here...)
        if encoding is None:
            encoding = locale.getpreferredencoding()
        self.encoding = encoding

        # check if we can use transparent background or not
        if curses.can_change_color():
            curses.use_default_colors()
            background = -1
        else:
            background = curses.COLOR_BLACK

        tmp_colors = [
            ('red', curses.COLOR_RED, background),
            ('blue', curses.COLOR_BLUE, background),
            ('pink', curses.COLOR_MAGENTA, background)
        ]

        self.colors = {}
        if curses.has_colors():
            for i, (name, fgcolor, bgcolor) in enumerate(tmp_colors, 1):
                curses.init_pair(i, fgcolor, bgcolor)
                self.colors[name] = i 

def toggle(self, y, x):
        """Toggle a cell's state between live and dead"""
        if x < 0 or self.X <= x or y < 0 or self.Y <= y:
            raise ValueError("Coordinates out of range %i,%i" % (y, x))
        if (x, y) in self.state:
            del self.state[x, y]
            self.scr.addch(y + 1, x + 1, ' ')
        else:
            self.state[x, y] = 1
            if curses.has_colors():
                # Let's pick a random color!
                self.scr.attrset(curses.color_pair(random.randrange(1, 7)))
            self.scr.addch(y + 1, x + 1, self.char)
            self.scr.attrset(0)
        self.scr.refresh() 

def display_menu(stdscr, menu_y):
    "Display the menu of possible keystroke commands"
    erase_menu(stdscr, menu_y)

    # If color, then light the menu up :-)
    if curses.has_colors():
        stdscr.attrset(curses.color_pair(1))
    stdscr.addstr(menu_y, 4,
        'Use the cursor keys to move, and space or Enter to toggle a cell.')
    stdscr.addstr(menu_y + 1, 4,
        'E)rase the board, R)andom fill, S)tep once or C)ontinuously, Q)uit')
    stdscr.attrset(0) 

def display_menu(stdscr, menu_y):
    "Display the menu of possible keystroke commands"
    erase_menu(stdscr, menu_y)

    # If color, then light the menu up :-)
    if curses.has_colors():
        stdscr.attrset(curses.color_pair(1))
    stdscr.addstr(menu_y, 4,
        'Use the cursor keys to move, and space or Enter to toggle a cell.')
    stdscr.addstr(menu_y + 1, 4,
        'E)rase the board, R)andom fill, S)tep once or C)ontinuously, Q)uit')
    stdscr.attrset(0) 

def display(self, clear=False):
        #APPLICATION_THEME_MANAGER.setTheme(self)
        if curses.has_colors() and not npysGlobalOptions.DISABLE_ALL_COLORS:
            self.curses_pad.attrset(0)
            color_attribute = self.theme_manager.findPair(self, self.color)
            self.curses_pad.bkgdset(' ', color_attribute)
            self.curses_pad.attron(color_attribute)
        self.curses_pad.erase()
        self.draw_form()
        for w in [wg for wg in self._widgets__ if wg.hidden]:
            w.clear()
        for w in [wg for wg in self._widgets__ if not wg.hidden]:
            w.update(clear=clear)

        self.refresh() 

def draw_form(self):
        if self.framed:
            if curses.has_colors() and not GlobalOptions.DISABLE_ALL_COLORS:
                self.curses_pad.attrset(0)
                self.curses_pad.bkgdset(' ', curses.A_NORMAL | self.theme_manager.findPair(self, self.color))
            self.curses_pad.border()
            self.draw_title_and_help() 

def check_theme(theme):
        """
        Check if the given theme is compatible with the terminal
        """
        terminal_colors = curses.COLORS if curses.has_colors() else 0

        if theme.required_colors > terminal_colors:
            return False
        elif theme.required_color_pairs > curses.COLOR_PAIRS:
            return False
        else:
            return True 

def set_theme(self, theme=None):
        """
        Check that the terminal supports the provided theme, and applies
        the theme to the terminal if possible.

        If the terminal doesn't support the theme, this falls back to the
        default theme. The default theme only requires 8 colors so it
        should be compatible with any terminal that supports basic colors.
        """

        terminal_colors = curses.COLORS if curses.has_colors() else 0
        default_theme = Theme(use_color=bool(terminal_colors))

        if theme is None:
            theme = default_theme

        elif theme.required_color_pairs > curses.COLOR_PAIRS:
            _logger.warning(
                'Theme `%s` requires %s color pairs, but $TERM=%s only '
                'supports %s color pairs, switching to default theme',
                theme.name, theme.required_color_pairs, self._term,
                curses.COLOR_PAIRS)
            theme = default_theme

        elif theme.required_colors > terminal_colors:
            _logger.warning(
                'Theme `%s` requires %s colors, but $TERM=%s only '
                'supports %s colors, switching to default theme',
                theme.name, theme.required_colors, self._term,
                curses.COLORS)
            theme = default_theme

        theme.bind_curses()
        self.theme = theme

        # Apply the default color to the whole screen
        self.stdscr.bkgd(str(' '), self.attr('Normal')) 

def __init__(self, this_plant, this_data):
        '''Initialization'''
        self.initialized = False
        self.screen = curses.initscr()
        curses.noecho()
        curses.raw()
        if curses.has_colors():
            curses.start_color()
        try:
            curses.curs_set(0)
        except curses.error:
            # Not all terminals support this functionality.
            # When the error is ignored the screen will look a little uglier, but that's not terrible
            # So in order to keep botany as accesible as possible to everyone, it should be safe to ignore the error.
            pass
        self.screen.keypad(1)
        self.plant = this_plant
        self.visited_plant = None
        self.user_data = this_data
        self.plant_string = self.plant.parse_plant()
        self.plant_ticks = str(int(self.plant.ticks))
        self.exit = False
        self.infotoggle = 0
        self.maxy, self.maxx = self.screen.getmaxyx()
        # Highlighted and Normal line definitions
        if curses.has_colors():
            self.define_colors()
            self.highlighted = curses.color_pair(1)
        else:
            self.highlighted = curses.A_REVERSE
        self.normal = curses.A_NORMAL
        # Threaded screen update for live changes
        screen_thread = threading.Thread(target=self.update_plant_live, args=())
        screen_thread.daemon = True
        screen_thread.start()
        # Recusive lock to prevent both threads from drawing at the same time
        self.screen_lock = threading.RLock()
        self.screen.clear()
        self.show(["water","look","garden","visit", "instructions"], title=' botany ', subtitle='options') 

def do_colors(self):
        "Returns True if the widget should try to paint in coloour."
        if curses.has_colors() and not GlobalOptions.DISABLE_ALL_COLORS:
            return True
        else:
            return False 

def init_colors(self):

        if curses.has_colors() and curses.can_change_color():
            curses.init_color(self.COLOR_BLACK, 0, 0, 0)
            curses.init_color(self.COLOR_WHITE, 1000, 1000, 1000)
            curses.init_color(self.COLOR_BLUE, 0, 0, 1000)
            curses.init_color(self.COLOR_RED, 1000, 0, 0)
            curses.init_color(self.COLOR_GREEN, 0, 1000, 0)

            for i in xrange(0, self.GRAYS):
                curses.init_color(
                        self.GRAY_BASE + i,
                        i * 1000 / (self.GRAYS - 1),
                        i * 1000 / (self.GRAYS - 1),
                        i * 1000 / (self.GRAYS - 1)
                        )
                curses.init_pair(
                        self.GRAY_BASE + i,
                        self.GRAY_BASE + i,
                        self.COLOR_BLACK
                        )

        else:
            self.COLOR_BLACK = curses.COLOR_BLACK
            self.COLOR_WHITE = curses.COLOR_WHITE
            self.COLOR_BLUE = curses.COLOR_BLUE
            self.COLOR_RED = curses.COLOR_RED
            self.COLOR_GREEN = curses.COLOR_GREEN

            for i in xrange(0, self.GRAYS):
                curses.init_pair(
                        self.GRAY_BASE + i,
                        self.COLOR_WHITE,
                        self.COLOR_BLACK
                        )

        curses.init_pair(self.BLACK, self.COLOR_BLACK, self.COLOR_BLACK)
        curses.init_pair(self.WHITE, self.COLOR_WHITE, self.COLOR_BLACK)
        curses.init_pair(self.BLUE, self.COLOR_BLUE, self.COLOR_BLACK)
        curses.init_pair(self.RED, self.COLOR_RED, self.COLOR_BLACK)
        curses.init_pair(self.GREEN, self.COLOR_GREEN, self.COLOR_BLACK) 

def __init__(self, stdscr):
    self._stdscr = stdscr

    # Mappings of names to the curses color attribute. Initially these all
    # reference black text, but if the terminal can handle color then
    # they're set with that foreground color.

    self._colors = dict([(color, 0) for color in COLOR_LIST])

    # allows for background transparency

    try:
      curses.use_default_colors()
    except curses.error:
      pass

    # makes the cursor invisible

    try:
      curses.curs_set(0)
    except curses.error:
      pass

    # initializes colors if the terminal can handle them

    try:
      if curses.has_colors():
        color_pair = 1

        for name, foreground in COLOR_LIST.items():
          background = -1  # allows for default (possibly transparent) background
          curses.init_pair(color_pair, foreground, background)
          self._colors[name] = curses.color_pair(color_pair)
          color_pair += 1
    except curses.error:
      pass 

def do_colors(self):
        "Returns True if the widget should try to paint in coloour."
        if curses.has_colors() and not GlobalOptions.DISABLE_ALL_COLORS:
            return True
        else:
            return False 

def display(self, clear=False):
        #APPLICATION_THEME_MANAGER.setTheme(self)
        if curses.has_colors() and not npysGlobalOptions.DISABLE_ALL_COLORS:
            self.curses_pad.attrset(0)
            color_attribute = self.theme_manager.findPair(self, self.color)
            self.curses_pad.bkgdset(' ', color_attribute)
            self.curses_pad.attron(color_attribute)
        self.curses_pad.erase()
        self.draw_form()
        for w in [wg for wg in self._widgets__ if wg.hidden]:
            w.clear()
        for w in [wg for wg in self._widgets__ if not wg.hidden]:
            w.update(clear=clear)

        self.refresh() 

def draw_form(self):
        if self.framed:
            if curses.has_colors() and not GlobalOptions.DISABLE_ALL_COLORS:
                self.curses_pad.attrset(0)
                self.curses_pad.bkgdset(' ', curses.A_NORMAL | self.theme_manager.findPair(self, self.color))
            self.curses_pad.border()
            self.draw_title_and_help() 

def init_colors():
    """initialize curses color pairs and give them names. The color pair
    can then later quickly be retrieved from the COLOR_PAIR[] dict"""
    index = 1
    for (name, back, fore) in COLORS:
        if curses.has_colors():
            curses.init_pair(index, fore, back)
            COLOR_PAIR[name] = curses.color_pair(index)
        else:
            COLOR_PAIR[name] = 0
        index += 1 

def check_theme(theme):
        """
        Check if the given theme is compatible with the terminal
        """
        terminal_colors = curses.COLORS if curses.has_colors() else 0

        if theme.required_colors > terminal_colors:
            return False
        elif theme.required_color_pairs > curses.COLOR_PAIRS:
            return False
        else:
            return True 

def set_theme(self, theme=None):
        """
        Check that the terminal supports the provided theme, and applies
        the theme to the terminal if possible.

        If the terminal doesn't support the theme, this falls back to the
        default theme. The default theme only requires 8 colors so it
        should be compatible with any terminal that supports basic colors.
        """

        terminal_colors = curses.COLORS if curses.has_colors() else 0
        default_theme = Theme(use_color=bool(terminal_colors))

        if theme is None:
            theme = default_theme

        elif theme.required_color_pairs > curses.COLOR_PAIRS:
            _logger.warning(
                'Theme `%s` requires %s color pairs, but $TERM=%s only '
                'supports %s color pairs, switching to default theme',
                theme.name, theme.required_color_pairs, self._term,
                curses.COLOR_PAIRS)
            theme = default_theme

        elif theme.required_colors > terminal_colors:
            _logger.warning(
                'Theme `%s` requires %s colors, but $TERM=%s only '
                'supports %s colors, switching to default theme',
                theme.name, theme.required_colors, self._term,
                curses.COLORS)
            theme = default_theme

        theme.bind_curses()
        self.theme = theme

        # Apply the default color to the whole screen
        self.stdscr.bkgd(str(' '), self.attr('Normal')) 

def do_colors(self):
        "Returns True if the widget should try to paint in coloour."
        if curses.has_colors() and not GlobalOptions.DISABLE_ALL_COLORS:
            return True
        else:
            return False