diff options
Diffstat (limited to 'Lib/tkinter/font.py')
| -rw-r--r-- | Lib/tkinter/font.py | 63 |
1 files changed, 40 insertions, 23 deletions
diff --git a/Lib/tkinter/font.py b/Lib/tkinter/font.py index 5425b06013..49292412f0 100644 --- a/Lib/tkinter/font.py +++ b/Lib/tkinter/font.py @@ -2,27 +2,27 @@ # # written by Fredrik Lundh, February 1998 # -# FIXME: should add 'displayof' option where relevant (actual, families, -# measure, and metrics) -# __version__ = "0.9" +import itertools 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: +class Font: """Represents a named font. Constructor options are: @@ -44,6 +44,8 @@ class Font: """ + counter = itertools.count(1) + def _set(self, kw): options = [] for k, v in kw.items(): @@ -63,7 +65,8 @@ class Font: options[args[i][1:]] = args[i+1] return options - def __init__(self, root=None, font=None, name=None, exists=False, **options): + def __init__(self, root=None, font=None, name=None, exists=False, + **options): if not root: root = tkinter._default_root if font: @@ -72,7 +75,7 @@ class Font: else: font = self._set(options) if not name: - name = "font" + str(id(self)) + name = "font" + str(next(self.counter)) self.name = name if exists: @@ -118,14 +121,17 @@ class Font: "Return a distinct copy of the current font" return Font(self._root, **self.actual()) - def actual(self, option=None): + def actual(self, option=None, displayof=None): "Return actual font attributes" + args = () + if displayof: + args = ('-displayof', displayof) if option: - return self._call("font", "actual", self.name, "-"+option) + args = args + ('-' + option, ) + return self._call("font", "actual", self.name, *args) else: return self._mkdict( - self._split(self._call("font", "actual", self.name)) - ) + self._split(self._call("font", "actual", self.name, *args))) def cget(self, option): "Get font attribute" @@ -138,37 +144,47 @@ class Font: *self._set(options)) else: return self._mkdict( - self._split(self._call("font", "config", self.name)) - ) + self._split(self._call("font", "config", self.name))) configure = config - def measure(self, text): + def measure(self, text, displayof=None): "Return text width" - return int(self._call("font", "measure", self.name, text)) + args = (text,) + if displayof: + args = ('-displayof', displayof, text) + return int(self._call("font", "measure", self.name, *args)) - def metrics(self, *options): + def metrics(self, *options, **kw): """Return font metrics. For best performance, create a dummy widget using this font before calling this method.""" - + args = () + displayof = kw.pop('displayof', None) + if displayof: + args = ('-displayof', displayof) if options: + args = args + self._get(options) return int( - self._call("font", "metrics", self.name, self._get(options)) - ) + self._call("font", "metrics", self.name, *args)) else: - res = self._split(self._call("font", "metrics", self.name)) + res = self._split(self._call("font", "metrics", self.name, *args)) options = {} for i in range(0, len(res), 2): options[res[i][1:]] = int(res[i+1]) return options -def families(root=None): + +def families(root=None, displayof=None): "Get font families (as a tuple)" if not root: root = tkinter._default_root - return root.tk.splitlist(root.tk.call("font", "families")) + args = () + if displayof: + args = ('-displayof', displayof) + return root.tk.splitlist(root.tk.call("font", "families", *args)) + def names(root=None): "Get names of defined fonts (as a tuple)" @@ -176,6 +192,7 @@ def names(root=None): root = tkinter._default_root return root.tk.splitlist(root.tk.call("font", "names")) + # -------------------------------------------------------------------- # test stuff @@ -198,10 +215,10 @@ if __name__ == "__main__": print(f.measure("hello"), f.metrics("linespace")) - print(f.metrics()) + print(f.metrics(displayof=root)) f = Font(font=("Courier", 20, "bold")) - print(f.measure("hello"), f.metrics("linespace")) + print(f.measure("hello"), f.metrics("linespace", displayof=root)) w = tkinter.Label(root, text="Hello, world", font=f) w.pack() |