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Questions tagged [incr-tcl]

[incr Tcl] is an object system package for the Tcl programming language.

[incr Tcl] (often abbreviated to “itcl” for ease of typing) is an object system for Tcl. It is usually used as an extension package — loaded with package require Itcl — and was originally developed for Tcl 7.* but which has been updated subsequently for the faster Tcl 8 system model. It provides a model of objects that is a hybrid between the command-focussed model of Tcl and the class model of (pre-template) C++. It is probably the most commonly used object system for Tcl, though many others exist.

Itcl also has the distinction of having inspired a number of features in the core Tcl language. These notably include namespaces and ensembles, as well as the TclOO object system that is present from Tcl 8.6 onwards. Note that a version of [incr Tcl] (4.0) is also supplied with Tcl 8.6 so as to make it far easier for existing code that depends on itcl, and that is built on top of the TclOO core.

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Static function inheritance in [incr Tcl]

Inheritance in incr Tcl doesn't work as expected. Consider the code below. package require Itcl ::itcl::class Base \ { public { proc function { } { puts "==== Base::function" } } } ::itcl::class Derived { inherit Base…
Vahagn
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TCL: get the class name of an object?

How to get class name of itcl object or check if the object exists?
Ashot
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TCL How to have as a class member an array (Itcl)

I want to have an array as a private class member. I use Itcl package. For lists and other simple variables I was writing: itcl::class MyClass { private variable m_myVar "" private variable m_myListVar {} .......... Now what I can do for array…
Narek
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ITCL - How to access associative array member inside a class?

How to access associative array member of a class inside the class itself? Itcl is modeled after C++, and in C++ we would write: SomeObject.SomePublicMember = ... How to do the same in Itcl? Without providing accessor procedure for such an array.…
Aryaps
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Incr Tcl Objects in List/Array/Dict

I'm trying to create a number of objects using itcl and then store them in a data structure so that i can invoke their methods later. But it is giving an error: The following is the code i have written: itcl::class router { variable…
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How to generate unique names for Tk toplevel window paths?

I need a way to generate an unused name for Tk toplevel window paths, just like #auto does it for Itcl objects. How can I do that? Maybe Tk has a similar utility?
Vahagn
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Why I can't set the common variable a property to be private or public?

In TCL's Itcl package there is a way to define a class and static members for that class using common keyword. But I have never seen that common variable was declared as private or public? Can we do that? If no, then why?
Narek
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Difference between calling $this or not

Using Tcl8.5, is there a difference between calling $this inside a method and not calling it? e.g.: package require Itcl namespace import itcl::* class MyCls { method foo {} method bar {} } body MyCls::bar {} { return "hi" } body…
Dor
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Using incr-tcl with version 8.4.19

Is it possible to use incr-tcl when working with tcl version 8.4.19? Which include packages are required? Until now we used Active-Tcl version 8.6, which came with incr-tcl built-in. Now we need to support stations that only have version 8.4.19…
dzisner
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Tcl Can I assign an object to reg variable?

I want to assign an object to a reg variable, but I don't know if I could do it, and if yes, how can I do it, what is the syntax? For example, I have a class Var: class Var { constructor {Name values order} {} { set mName…
Tamara Bozz
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How to check if one class is a base of another in [incr Tcl]?

Givetn two class names, className1 and className2, how can I check if className1 has className2 anywhere in its heritage?
Vahagn
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How to call itcl::scope for an arbitrary object of the current class?

itcl::scope returns the full name of the specified member variable of $this. How can I call itcl::scope for another object of the same class (not for $this)? Here is a workaround. itcl::class dummy { variable m_data method function { other…
Vahagn
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How to make scrolledtext online?

Here is a demo sample of TCL code for iwidgets::scrolledtext. package require Iwidgets iwidgets::scrolledtext .st \ -labeltext "Scrolledtext Example" \ -visibleitems 70x20 \ -textfont {Courier 10} \ -textbackground…
Vahagn
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How to get a reference on the Itcl class member variable?

Say I have the following structure: package require Itcl itcl::class AAA { private variable m_list {} constructor {} { fill m_list list } } How to get a reference on the m_list in order to write foreach elem $reference {.......}…
Narek
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TCL Error: can't set "::streamID(1,10,1)": variable isn't array

I have read the thread, Cant read variable, isnt array, and I think may be related somehow, but I can't figure out how. In the following TCL snippet, a three dimensional array ::stream is tested and a value is read. The array contains a scalar ID…
Rich Maes
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