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Edit File : tkFont.py \| Size : 6.02 KB
# Tkinter font wrapper # # written by Fredrik Lundh, February 1998 # # FIXME: should add 'displayof' option where relevant (actual, families, # measure, and metrics) # __version__ = "0.9" import Tkinter # weight/slant NORMAL = "normal" ROMAN = "roman" BOLD = "bold" ITALIC = "italic" def nametofont(name): """Given the name of a tk named font, returns a Font representation. """ return Font(name=name, exists=True) class Font: """Represents a named font. Constructor options are: font -- font specifier (name, system font, or (family, size, style)-tuple) name -- name to use for this font configuration (defaults to a unique name) exists -- does a named font by this name already exist? Creates a new named font if False, points to the existing font if True. Raises _Tkinter.TclError if the assertion is false. the following are ignored if font is specified: family -- font 'family', e.g. Courier, Times, Helvetica size -- font size in points weight -- font thickness: NORMAL, BOLD slant -- font slant: ROMAN, ITALIC underline -- font underlining: false (0), true (1) overstrike -- font strikeout: false (0), true (1) """ def _set(self, kw): options = [] for k, v in kw.items(): if not isinstance(v, basestring): v = str(v) options.append("-"+k) options.append(v) return tuple(options) def _get(self, args): options = [] for k in args: options.append("-"+k) return tuple(options) def _mkdict(self, args): options = {} for i in range(0, len(args), 2): options[args[i][1:]] = args[i+1] return options def __init__(self, root=None, font=None, name=None, exists=False, *options): if not root: root = Tkinter._default_root tk = getattr(root, 'tk', root) if font: # get actual settings corresponding to the given font font = tk.splitlist(tk.call("font", "actual", font)) else: font = self._set(options) if not name: name = "font" + str(id(self)) self.name = name if exists: self.delete_font = False # confirm font exists if self.name not in tk.splitlist(tk.call("font", "names")): raise Tkinter._tkinter.TclError, "named font %s does not already exist" % (self.name,) # if font config info supplied, apply it if font: tk.call("font", "configure", self.name, font) else: # create new font (raises TclError if the font exists) tk.call("font", "create", self.name, font) self.delete_font = True self._tk = tk self._split = tk.splitlist self._call = tk.call def __str__(self): return self.name def __eq__(self, other): return isinstance(other, Font) and self.name == other.name def __getitem__(self, key): return self.cget(key) def __setitem__(self, key, value): self.configure({key: value}) def __del__(self): try: if self.delete_font: self._call("font", "delete", self.name) except (KeyboardInterrupt, SystemExit): raise except Exception: pass def copy(self): "Return a distinct copy of the current font" return Font(self._tk, self.actual()) def actual(self, option=None): "Return actual font attributes" if option: return self._call("font", "actual", self.name, "-"+option) else: return self._mkdict( self._split(self._call("font", "actual", self.name)) ) def cget(self, option): "Get font attribute" return self._call("font", "config", self.name, "-"+option) def config(self, options): "Modify font attributes" if options: self._call("font", "config", self.name, self._set(options)) else: return self._mkdict( self._split(self._call("font", "config", self.name)) ) configure = config def measure(self, text): "Return text width" return int(self._call("font", "measure", self.name, text)) def metrics(self, *options): """Return font metrics. For best performance, create a dummy widget using this font before calling this method.""" if options: return int( self._call("font", "metrics", self.name, self._get(options)) ) else: res = self._split(self._call("font", "metrics", self.name)) options = {} for i in range(0, len(res), 2): options[res[i][1:]] = int(res[i+1]) return options def families(root=None): "Get font families (as a tuple)" if not root: root = Tkinter._default_root return root.tk.splitlist(root.tk.call("font", "families")) def names(root=None): "Get names of defined fonts (as a tuple)" if not root: root = Tkinter._default_root return root.tk.splitlist(root.tk.call("font", "names")) # -------------------------------------------------------------------- # test stuff if __name__ == "__main__": root = Tkinter.Tk() # create a font f = Font(family="times", size=30, weight=NORMAL) print f.actual() print f.actual("family") print f.actual("weight") print f.config() print f.cget("family") print f.cget("weight") print names() print f.measure("hello"), f.metrics("linespace") print f.metrics() f = Font(font=("Courier", 20, "bold")) print f.measure("hello"), f.metrics("linespace") w = Tkinter.Label(root, text="Hello, world", font=f) w.pack() w = Tkinter.Button(root, text="Quit!", command=root.destroy) w.pack() fb = Font(font=w["font"]).copy() fb.config(weight=BOLD) w.config(font=fb) Tkinter.mainloop() Back

Edit File : tkFont.py | Size : 6.02 KB

# Tkinter font wrapper
#
# written by Fredrik Lundh, February 1998
#
# FIXME: should add 'displayof' option where relevant (actual, families,
#        measure, and metrics)
#

__version__ = "0.9"

import Tkinter

# weight/slant
NORMAL = "normal"
ROMAN = "roman"
BOLD   = "bold"
ITALIC = "italic"

def nametofont(name):
    """Given the name of a tk named font, returns a Font representation.
    """
    return Font(name=name, exists=True)

class Font:

"""Represents a named font.

Constructor options are:

font -- font specifier (name, system font, or (family, size, style)-tuple)
    name -- name to use for this font configuration (defaults to a unique name)
    exists -- does a named font by this name already exist?
       Creates a new named font if False, points to the existing font if True.
       Raises _Tkinter.TclError if the assertion is false.

the following are ignored if font is specified:

family -- font 'family', e.g. Courier, Times, Helvetica
    size -- font size in points
    weight -- font thickness: NORMAL, BOLD
    slant -- font slant: ROMAN, ITALIC
    underline -- font underlining: false (0), true (1)
    overstrike -- font strikeout: false (0), true (1)

"""

def _set(self, kw):
        options = []
        for k, v in kw.items():
            if not isinstance(v, basestring):
                v = str(v)
            options.append("-"+k)
            options.append(v)
        return tuple(options)

def _get(self, args):
        options = []
        for k in args:
            options.append("-"+k)
        return tuple(options)

def _mkdict(self, args):
        options = {}
        for i in range(0, len(args), 2):
            options[args[i][1:]] = args[i+1]
        return options

def __init__(self, root=None, font=None, name=None, exists=False, **options):
        if not root:
            root = Tkinter._default_root
        tk = getattr(root, 'tk', root)
        if font:
            # get actual settings corresponding to the given font
            font = tk.splitlist(tk.call("font", "actual", font))
        else:
            font = self._set(options)
        if not name:
            name = "font" + str(id(self))
        self.name = name

if exists:
            self.delete_font = False
            # confirm font exists
            if self.name not in tk.splitlist(tk.call("font", "names")):
                raise Tkinter._tkinter.TclError, "named font %s does not already exist" % (self.name,)
            # if font config info supplied, apply it
            if font:
                tk.call("font", "configure", self.name, *font)
        else:
            # create new font (raises TclError if the font exists)
            tk.call("font", "create", self.name, *font)
            self.delete_font = True
        self._tk = tk
        self._split = tk.splitlist
        self._call  = tk.call

def __str__(self):
        return self.name

def __eq__(self, other):
        return isinstance(other, Font) and self.name == other.name

def __getitem__(self, key):
        return self.cget(key)

def __setitem__(self, key, value):
        self.configure(**{key: value})

def __del__(self):
        try:
            if self.delete_font:
                self._call("font", "delete", self.name)
        except (KeyboardInterrupt, SystemExit):
            raise
        except Exception:
            pass

def copy(self):
        "Return a distinct copy of the current font"
        return Font(self._tk, **self.actual())

def actual(self, option=None):
        "Return actual font attributes"
        if option:
            return self._call("font", "actual", self.name, "-"+option)
        else:
            return self._mkdict(
                self._split(self._call("font", "actual", self.name))
                )

def cget(self, option):
        "Get font attribute"
        return self._call("font", "config", self.name, "-"+option)

def config(self, **options):
        "Modify font attributes"
        if options:
            self._call("font", "config", self.name,
                  *self._set(options))
        else:
            return self._mkdict(
                self._split(self._call("font", "config", self.name))
                )

configure = config

def measure(self, text):
        "Return text width"
        return int(self._call("font", "measure", self.name, text))

def metrics(self, *options):
        """Return font metrics.

For best performance, create a dummy widget
        using this font before calling this method."""

if options:
            return int(
                self._call("font", "metrics", self.name, self._get(options))
                )
        else:
            res = self._split(self._call("font", "metrics", self.name))
            options = {}
            for i in range(0, len(res), 2):
                options[res[i][1:]] = int(res[i+1])
            return options

def families(root=None):
    "Get font families (as a tuple)"
    if not root:
        root = Tkinter._default_root
    return root.tk.splitlist(root.tk.call("font", "families"))

def names(root=None):
    "Get names of defined fonts (as a tuple)"
    if not root:
        root = Tkinter._default_root
    return root.tk.splitlist(root.tk.call("font", "names"))

# --------------------------------------------------------------------
# test stuff

if __name__ == "__main__":

root = Tkinter.Tk()

# create a font
    f = Font(family="times", size=30, weight=NORMAL)

print f.actual()
    print f.actual("family")
    print f.actual("weight")

print f.config()
    print f.cget("family")
    print f.cget("weight")

print names()

print f.measure("hello"), f.metrics("linespace")

print f.metrics()

f = Font(font=("Courier", 20, "bold"))
    print f.measure("hello"), f.metrics("linespace")

w = Tkinter.Label(root, text="Hello, world", font=f)
    w.pack()

w = Tkinter.Button(root, text="Quit!", command=root.destroy)
    w.pack()

fb = Font(font=w["font"]).copy()
    fb.config(weight=BOLD)

w.config(font=fb)

Tkinter.mainloop()

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