mirror of https://github.com/python/cpython.git
193 lines
4.9 KiB
Python
193 lines
4.9 KiB
Python
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#
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# Tkinter
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# $Id$
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#
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# font wrapper
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#
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# written by Fredrik Lundh <fredrik@pythonware.com>, February 1998
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#
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# FIXME: should add 'displayof' option where relevant (actual, families,
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# measure, and metrics)
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#
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# Copyright (c) Secret Labs AB 1998.
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#
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# info@pythonware.com
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# http://www.pythonware.com
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#
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__version__ = "0.9"
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import Tkinter
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import string
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# weight/slant
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NORMAL = "normal"
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BOLD = "bold"
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ITALIC = "italic"
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class Font:
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"""Represents a named font.
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Constructor options are:
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font -- font specifier (name, system font, or (family, size, style)-tuple)
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or any combination of
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family -- font 'family', e.g. Courier, Times, Helvetica
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size -- font size in points
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weight -- font thickness: NORMAL, BOLD
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slant -- font slant: NORMAL, ITALIC
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underline -- font underlining: false (0), true (1)
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overstrike -- font strikeout: false (0), true (1)
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name -- name to use for this font configuration (defaults to a unique name)
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"""
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def _set(self, kw):
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options = []
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for k, v in kw.items():
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options.append("-"+k)
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options.append(str(v))
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return tuple(options)
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def _get(self, args):
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options = []
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for k in args:
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options.append("-"+k)
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return tuple(options)
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def _mkdict(self, args):
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options = {}
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for i in range(0, len(args), 2):
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options[args[i][1:]] = args[i+1]
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return options
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def __init__(self, root=None, font=None, name=None, **options):
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if not root:
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root = Tkinter._default_root
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if font:
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# get actual settings corresponding to the given font
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font = root.tk.splitlist(root.tk.call("font", "actual", font))
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else:
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font = self._set(options)
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if not name:
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name = "font" + str(id(self))
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self.name = name
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apply(root.tk.call, ("font", "create", name) + font)
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# backlinks!
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self._root = root
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self._split = root.tk.splitlist
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self._call = root.tk.call
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def __str__(self):
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return self.name
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def __del__(self):
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try:
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self._call("font", "delete", self.name)
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except (AttributeError, Tkinter.TclError):
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pass
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def copy(self):
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"Return a distinct copy of the current font"
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return apply(Font, (self._root,), self.actual())
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def actual(self, option=None):
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"Return actual font attributes"
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if option:
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return self._call("font", "actual", self.name, "-"+option)
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else:
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return self._mkdict(
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self._split(self._call("font", "actual", self.name))
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)
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def cget(self, option):
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"Get font attribute"
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return self._call("font", "config", self.name, "-"+option)
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def config(self, **options):
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"Modify font attributes"
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if options:
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apply(self._call, ("font", "config", self.name) +
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self._set(options))
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else:
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return self._mkdict(
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self._split(self._call("font", "config", self.name))
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)
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configure = config
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def measure(self, text):
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"Return text width"
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return string.atoi(self._call("font", "measure", self.name, text))
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def metrics(self, *options):
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"""Return font metrics.
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For best performance, create a dummy widget
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using this font before calling this method."""
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if options:
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return string.atoi(
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self._call("font", "metrics", self.name, self._get(options))
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)
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else:
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res = self._split(self._call("font", "metrics", self.name))
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options = {}
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for i in range(0, len(res), 2):
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options[res[i][1:]] = string.atoi(res[i+1])
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return options
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def families(root=None):
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"Get font families (as a tuple)"
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if not root:
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root = Tkinter._default_root
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return root.tk.splitlist(root.tk.call("font", "families"))
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def names(root=None):
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"Get names of defined fonts (as a tuple)"
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if not root:
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root = Tkinter._default_root
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return root.tk.splitlist(root.tk.call("font", "names"))
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# --------------------------------------------------------------------
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# test stuff
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if __name__ == "__main__":
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root = Tkinter.Tk()
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# create a font
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f = Font(family="times", size=30, weight=NORMAL)
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print f.actual()
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print f.actual("family")
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print f.actual("weight")
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print f.config()
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print f.cget("family")
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print f.cget("weight")
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print names()
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print f.measure("hello"), f.metrics("linespace")
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print f.metrics()
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f = Font(font=("Courier", 20, "bold"))
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print f.measure("hello"), f.metrics("linespace")
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w = Tkinter.Label(root, text="Hello, world", font=f)
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w.pack()
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w = Tkinter.Button(root, text="Quit!", command=root.destroy)
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w.pack()
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fb = Font(font=w["font"]).copy()
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fb.config(weight=BOLD)
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w.config(font=fb)
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Tkinter.mainloop()
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