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author | Martin v. Löwis <martin@v.loewis.de> | 2006-06-17 09:15:14 (GMT) |
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committer | Martin v. Löwis <martin@v.loewis.de> | 2006-06-17 09:15:14 (GMT) |
commit | 337487e3b87f887abdb3b47781508c6437cd7e94 (patch) | |
tree | 8d88d4b06b79efbcee2801726cb8ba7554424bcb | |
parent | 541660553d646db451655c0f79640f0b8f64baad (diff) | |
download | cpython-337487e3b87f887abdb3b47781508c6437cd7e94.zip cpython-337487e3b87f887abdb3b47781508c6437cd7e94.tar.gz cpython-337487e3b87f887abdb3b47781508c6437cd7e94.tar.bz2 |
Patch #763580: Add name and value arguments to
Tkinter variable classes.
-rw-r--r-- | Lib/lib-tk/Tkinter.py | 82 | ||||
-rw-r--r-- | Misc/NEWS | 3 |
2 files changed, 66 insertions, 19 deletions
diff --git a/Lib/lib-tk/Tkinter.py b/Lib/lib-tk/Tkinter.py index b3d58a2..7cbcb50 100644 --- a/Lib/lib-tk/Tkinter.py +++ b/Lib/lib-tk/Tkinter.py @@ -168,18 +168,30 @@ class Variable: Subclasses StringVar, IntVar, DoubleVar, BooleanVar are specializations that constrain the type of the value returned from get().""" _default = "" - def __init__(self, master=None): - """Construct a variable with an optional MASTER as master widget. - The variable is named PY_VAR_number in Tcl. + def __init__(self, master=None, value=None, name=None): + """Construct a variable + + MASTER can be given as master widget. + VALUE is an optional value (defaults to "") + NAME is an optional Tcl name (defaults to PY_VARnum). + + If NAME matches an existing variable and VALUE is omitted + then the existing value is retained. """ global _varnum if not master: master = _default_root self._master = master self._tk = master.tk - self._name = 'PY_VAR' + repr(_varnum) - _varnum = _varnum + 1 - self.set(self._default) + if name: + self._name = name + else: + self._name = 'PY_VAR' + `_varnum` + _varnum += 1 + if value != None: + self.set(value) + elif not self._tk.call("info", "exists", self._name): + self.set(self._default) def __del__(self): """Unset the variable in Tcl.""" self._tk.globalunsetvar(self._name) @@ -217,15 +229,29 @@ class Variable: """Return all trace callback information.""" return map(self._tk.split, self._tk.splitlist( self._tk.call("trace", "vinfo", self._name))) + def __eq__(self, other): + """Comparison for equality (==). + + Note: if the Variable's master matters to behavior + also compare self._master == other._master + """ + return self.__class__.__name__ == other.__class__.__name__ \ + and self._name == other._name class StringVar(Variable): """Value holder for strings variables.""" _default = "" - def __init__(self, master=None): + def __init__(self, master=None, value=None, name=None): """Construct a string variable. - MASTER can be given as master widget.""" - Variable.__init__(self, master) + MASTER can be given as master widget. + VALUE is an optional value (defaults to "") + NAME is an optional Tcl name (defaults to PY_VARnum). + + If NAME matches an existing variable and VALUE is omitted + then the existing value is retained. + """ + Variable.__init__(self, master, value, name) def get(self): """Return value of variable as string.""" @@ -237,11 +263,17 @@ class StringVar(Variable): class IntVar(Variable): """Value holder for integer variables.""" _default = 0 - def __init__(self, master=None): + def __init__(self, master=None, value=None, name=None): """Construct an integer variable. - MASTER can be given as master widget.""" - Variable.__init__(self, master) + MASTER can be given as master widget. + VALUE is an optional value (defaults to 0) + NAME is an optional Tcl name (defaults to PY_VARnum). + + If NAME matches an existing variable and VALUE is omitted + then the existing value is retained. + """ + Variable.__init__(self, master, value, name) def set(self, value): """Set the variable to value, converting booleans to integers.""" @@ -256,11 +288,17 @@ class IntVar(Variable): class DoubleVar(Variable): """Value holder for float variables.""" _default = 0.0 - def __init__(self, master=None): + def __init__(self, master=None, value=None, name=None): """Construct a float variable. - MASTER can be given as a master widget.""" - Variable.__init__(self, master) + MASTER can be given as master widget. + VALUE is an optional value (defaults to 0.0) + NAME is an optional Tcl name (defaults to PY_VARnum). + + If NAME matches an existing variable and VALUE is omitted + then the existing value is retained. + """ + Variable.__init__(self, master, value, name) def get(self): """Return the value of the variable as a float.""" @@ -268,12 +306,18 @@ class DoubleVar(Variable): class BooleanVar(Variable): """Value holder for boolean variables.""" - _default = "false" - def __init__(self, master=None): + _default = False + def __init__(self, master=None, value=None, name=None): """Construct a boolean variable. - MASTER can be given as a master widget.""" - Variable.__init__(self, master) + MASTER can be given as master widget. + VALUE is an optional value (defaults to False) + NAME is an optional Tcl name (defaults to PY_VARnum). + + If NAME matches an existing variable and VALUE is omitted + then the existing value is retained. + """ + Variable.__init__(self, master, value, name) def get(self): """Return the value of the variable as a bool.""" @@ -163,6 +163,9 @@ Extension Modules Library ------- +- Patch #763580: Add name and value arguments to Tkinter variable + classes. + - Bug #1117556: SimpleHTTPServer now tries to find and use the system's mime.types file for determining MIME types. |