1scopedobject  −  Create  and  manipulate  a scoped  class object.

scopedobject objName ?options? None

3Name:   enterscopecommand:
4Command‐Line Switch:    ‐enterscopecommand
5Specifies a Tcl command to invoke when  an  object  enters  scope
6(i.e. when it is created..). The default is {}.
7Name:   enterscopecommand:
8Command‐Line Switch:    ‐enterscopecommand
9Specifies  a  Tcl  command  to  invoke when an object exits scope
10(i.e. when it is deleted..). The default is {}.
11
12The scopedobject command creates a base class for  defining  Itcl
13classes which posses scoped behavior like Tcl variables.  The ob‐
14jects are only accessible within the procedure in which they  are
15instantiated  and  are  deleted when the procedure returns.  This
16class was designed to be a general purpose base  class  for  sup‐
17porting scoped incr Tcl classes.  The options include the execute
18a Tcl script command when an object enters and exits  its  scope.
19The  scopedobject command creates a new Tcl command whose name is

pathName. This command may be used to invoke various operations

21on  the  object.  It has the following general form: pathName op‐

tion ?arg arg ...? Option and the args determine the exact be‐

23havior  of  the command.  The following commands are possible for
24scopedobject objects: pathName cget option  Returns  the  current
25value  of  the  configuration option given by option.  Option may
26have any of the values  accepted  by  the  scopedobject  command.

pathName configure ?option? ?value option value ...? Query or

28modify the configuration options of the object.  If no option  is
29specified, returns a list describing all of the available options
30for pathName.  If option is specified with  no  value,  then  the
31command returns a list describing the one named option (this list
32will be identical to the corresponding sublist of the  value  re‐
33turned  if  no option is specified).  If one or more option−value
34pairs are specified, then the command modifies the given  objects
35option(s)  to  have the given value(s);  in this case the command
36returns an empty string.  Option may have any of the  values  ac‐
37cepted by the scopedobject command.
38
39The  scopedobject  was  primarily  meant to be a base class.  The
40following is an example of usage without inheritance:
41  proc scopedobject_demo {} {
42    iwidgets::scopedobject #auto         ‐exitscopecommand  {puts
43"enter  scopedobject_demo"}         ‐exitscopecommand {puts "exit
44scopedobject_demo"}
45  }
46
47  scopedobject_demo
48
49John A. Tucker scopedobject, object
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