---
name: "itclcomponent"
section: "3itcl"
platform: "linux"
package: "tcl-itcl4-doc"
version: "4.3.2-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/itclcomponent"
---

# itclcomponent(3itcl)

define components for extendedclass, widget or widgetadaptor Parts of this description are "borrowed" from Tcl extension \[snit\], as the functionality is mostly identical.

```

```

## NAME

itcl::component - define components for extendedclass, widget or widgetadaptor

Parts of this description are "borrowed" from Tcl extension \[snit\], as the functionality is mostly identical.

## WARNING!

This is new functionality in \[incr Tcl\] where the API can still change!!

## SYNOPSIS

```
public component comp ?-inherit?
protected component comp ?-inherit?
private component comp ?-inherit?
```

```

```

## DESCRIPTION

The **component** command is used inside an **\[incr Tcl\]** extendedclass/widget/widgetadaptor definition to define components.

Explicitly declares a component called comp, and automatically defines the component's instance variable.

If the *-inherit* option is specified then all unknown methods and options will be delegated to this component. The name -inherit implies that instances of this new type inherit, in a sense, the methods and options of the component. That is, -inherit yes is equivalent to:

```
component mycomp
delegate option * to mycomp
delegate method * to mycomp
```

## KEYWORDS

component, widget, widgetadaptor, extendedclass