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| Subject | ： Re: Bind Text Variable with an element in a list |
| Date | ： 2007/05/12(Sat) 01:47:35 |
| Contributor | ： Akio Morita |
> Hi, All. There's a problem while I bind TextVaiable with an element in a list. Look at the script below:
>
> At Last section, I would like to bind the Variable in KBFText to strlist[1] and strlist[2]. While I click the Button to refresh, the "str" and "strlist" both change. But only the Text which bind to "str" changes, the other two which bind to "strlist" do not change.
>
>
> Can you give some help?
>
In the case that symbol `foo' is binded to List object,
foo[_Real] is translated to Part operator foo[[_Real]].
Thus, your code fragment KBFText[Variable:>strlist[1]]
means KBFText[Variable:>strlist[[1]]].
In the Tkinter & KBFrame framework library,
both bare symbol (foo) and hashed symbol (foo[___])
can be used to Variable option. But, Parted symbol (foo[[__Real]])
can't be used to Variable option, because we can't override
Part[] intrinsic function by UpSetDelayed[]. (See Packages/Tkinter.n in detail)
Collected code is shown in below.
---------------------------------------
FFS;
w=KBMainFrame["Date",f,Title->"SAD"];
b=Button[f,Text->"Refresh",Command:>refresh];
strlist[1]="000";
strlist[2]="000";
str = "000";
refresh:=(
str = DateString[];
strlist[1]=DateString[];
strlist[2]="It's "//DateString[];
Print[str];
Print[strlist[1]];
Print[strlist[2]];
);
cf=KBFComponentFrame[f,
Add->{
KBFGroup[Text->"Group1"],
KBFText[Text->"Time";],
KBFText[Variable:>str],
KBFText[Variable:>strlist[1]],
KBFText[Variable:>strlist[2]]
}
];
TkWait[];
----------------------------------------
> Further more, can "For" loop be used while bind Variables to KBFText?
> like:
>
>
> For[i=1,i<=10,i++,
> KBFText[Variable:>strlist[i]]];
Shown code fragment is not collect, KBFText[] does not generate Text widget by itself.
Widgets are generated by KBFComponentFrame[] function, and KBFText[] is a configuration
information for KBFComponentFrame[] function.
Thus, I recommend to use Table/Map function insted of For loop.
Ex)
cf = KBFComponentFrame[f, Add->{
KBFGroup[Text->"Group2"],
Null@@Map[With[{i = #}, KBFText[Variable:>strlist[i]]]&, Range[10]]}];