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 <TITLE>combobox - Create and manipulate combination box widgets</TITLE>
 <H1>combobox - Create and manipulate combination box widgets</H1>

 </pre><H2>SYNOPSIS</H2>
 <B>combobox<I> <I>pathName </I>?<I>options</I>?
 </pre><H2>INHERITANCE</H2>
 itk::Widget &lt;- LabeledWidget &lt;- Entryfield &lt;- Combobox
 </pre><H2>STANDARD OPTIONS</H2>
 <P>
 <table cellpadding=5>
 <td valign=top>
 <B></B><br>
 cursor<br>
 highlightColor<br>
 insertWidth<br>
 insertWidth<br>
 selectBorderWidth<br>
 </td>
 <td valign=top>
 <B><br>
 justify<br>
 highlightThickness<br>
 insertBackground<br>
 insertBorderWidth<br>
 textVariable<br>
 </td>
 <td valign=top>
 background<br>
 exportSelection<br>
 relief<br>
 insertOffTime<br>
 selectForeground<br>
 </B></I><br>
 </td>
 <td valign=top>
 borderWidth<br>
 foreground<br>
 width<br>
 insertOnTime<br>
 selectBackground<br>
 </td>
 </table>
 <P>
 See the <A HREF="http://www.sco.com/Technology/tcl/man/tk_man/options.n.html"> "options" </A> manual entry for details on the standard options.
 </pre><H2>ASSOCIATED OPTIONS</H2>
 <P>
 <table cellpadding=5>
 <td valign=top>
 <B>hscrollmode</B><br>
 </td>
 <td valign=top>
 <B>textBackground</B><br>
 </td>
 <td valign=top>
 <B>textFont</B><br>
 </td>
 <td valign=top>
 <B>vscrollmode</B><br>
 </td>
 </table>
 <P>
 See the <A HREF="scrolledlistbox.n.html"> "scrolledlistbox" </A> manual entry for details on the above inherited
 options.
 <P>
 <table cellpadding=5>
 <td valign=top>
 <B>show</B><br>
 </td>
 <td valign=top>
 </td>
 <td valign=top>
 </td>
 <td valign=top>
 </td>
 </table>
 <P>
 See the <A HREF="http://www.sco.com/Technology/tcl/man/tk_man/entry.n.html"> "entry" </A> manual entry for details on the above inherited option.
 </pre><H2>INHERITED OPTIONS</H2>
 <P>
 <table cellpadding=5>
 <td valign=top>
 <B>childSitePos</B><br>
 <B>invalid</B><br>
 </td>
 <td valign=top>
 <B>command</B><br>
 <B>textBackground</B><br>
 </td>
 <td valign=top>
 <B>fixed</B><br>
 <B>textFont</B><br>
 </td>
 <td valign=top>
 <B>focusCommand</B><br>
 <B>validate</B><br>
 </td>
 </table>
 <P>
 See the <A HREF="entryfield.n.html"> "entryfield" </A> class manual entry for details on the inherited options.
 <P>
 <table cellpadding=5>
 <td valign=top>
 <B>labelBitmap</B><br>
 <B>labelPos</B><br>
 </td>
 <td valign=top>
 <B>labelFont</B><br>
 <B>labelText</B><br>
 </td>
 <td valign=top>
 <B>labelImage</B><br>
 <B>labelVariable</B><br>
 </td>
 <td valign=top>
 <B>labelMargin</B><br>
 </td>
 </table>
 <P>
 See the <A HREF="labeledwidget.n.html"> "labeledwidget" </A> class manual entry for details on the
 inherited options.
 </pre><H2>WIDGET-SPECIFIC OPTIONS</H2>
 <P>
 <pre>
 Name:                   <B>arrowRelief</B>
 Class:                  <B>Relief</B>
 Command-Line Switch:	<B>-arrowrelief</B>
 </pre>
 <UL>
 Specifies the relief style to use for a dropdown Combobox's arrow
 button in a normal (not depressed) state. Acceptable values
 are <B>raised</B>, <B>sunken</B>, <B>flat</B>, <B>ridge</B>, and <B>groove</B>.
 Sunken is discouraged as this is the relief used to indicate a depressed
 state. This option has no effect on simple Comboboxes. The default is raised.
 </UL>
 <P>
 <pre>
 Name:                   <B>completion</B>
 Class:                  <B>Completion</B>
 Command-Line Switch:	<B>-completion</B>
 </pre>
 <UL>
 Boolean given in any of the forms acceptable to <B>Tcl_GetBoolean</B> which
 determines whether insertions into the entry field, whether from the
 keyboard or programmatically via the <B>insert</B> method, are
 automatically completed with the first matching item from the listbox.  The
 default is true.
 </UL>
 <P>
 <pre>
 Name:                   <B>dropdown</B>
 Class:                  <B>Dropdown</B>
 Command-Line Switch:	<B>-dropdown</B>
 </pre>
 <UL>
 Boolean describing the Combobox layout style given in any of the forms
 acceptable to <B>Tcl_GetBoolean</B>. If true, the Combobox
 will be a dropdown style
 widget which displays an entry field and an arrow button which when activated
 will pop up a scrollable list of items. If false, a simple Combobox style
 will be used which has an entry field and a scrollable list beneath it
 which is always visible. Both styles allow an optional label for the entry
 field area. The default is true.
 </UL>
 <P>
 <pre>
 Name:                   <B>editable</B>
 Class:                  <B>Editable</B>
 Command-Line Switch:	<B>-editable</B>
 </pre>
 <UL>
 Boolean describing whether or not the text entry area is editable
 by the user. If true the user can add items to the combobox by entering text
 into the entry area and then pressing Return. If false, the list of items is
 non-editable and can only be changed by calling the insert or delete
 methods. (The value in the entry field can still be modified by selecting
 from the list.)  Given in any of the forms acceptable to <B>Tcl_GetBoolean</B>.
 The default is true.
 </UL>
 <P>
 <pre>
 Name:                   <B>grab</B>
 Class:                  <B>Grab</B>
 Command-Line Switch:	<B>-grab</B>
 </pre>
 <UL>
 This option sets the grab scope for the appearance of the listbox in
 drop-down comboboxes.  It can be either global or local.  The default is
 local.
 </UL>
 <P>
 <pre>
 Name:                   <B>listHeight</B>
 Class:                  <B>Height</B>
 Command-Line Switch:	<B>-listheight</B>
 </pre>
 <UL>
 Height of the listbox specified in any of the forms acceptable to
 <B>Tk_GetPixels</B>.  The default is 150 pixels.
 </UL>
 <P>
 <pre>
 Name:                   <B>margin</B>
 Class:                  <B>Margin</B>
 Command-Line Switch:	<B>-margin</B>
 </pre>
 <UL>
 Specifies the width in pixels between the entry component and the arrow button
 for a dropdown Combobox given in any of the forms acceptable to
 <B>Tk_GetPixels</B>. This option has no effect on a simple Combobox. The
 default is 1.
 </UL>
 <P>
 <pre>
 Name:                   <B>popupCursor</B>
 Class:                  <B>Cursor</B>
 Command-Line Switch:	<B>-popupcursor</B>
 </pre>
 <UL>
 Specifies the cursor to be used for dropdown style listboxes. The value
 may have any of the forms acceptable to <B>Tk_GetCursor</B>. The default is
 arrow.
 </UL>
 <P>
 <pre>
 Name:                   <B>selectionCommand</B>
 Class:                  <B>SelectionCommand</B>
 Command-Line Switch:	<B>-selectioncommand</B>
 </pre>
 <UL>
 Specifies a Tcl command procedure which is called when an item in the
 listbox area is selected. The item will be selected in the list, the listbox
 will be removed if it is a dropdown Combobox, and the selected item's
 text will be inserted into the entry field before the -selectioncommand proc is
 called. The default is {}.
 </UL>
 <P>
 <pre>
 Name:                   <B>state</B>
 Class:                  <B>State</B>
 Command-Line Switch:	<B>-state</B>
 </pre>
 <UL>
 Specifies the overall state of the Combobox megawidget.  Can be either
 normal or disabled.  If the Combobox is disabled, no text can be entered
 into the entry field, no selection can be made in the listbox, and the
 arrowBtn component is disabled.  The default is normal.
 </UL>
 <P>
 <pre>
 Name:                   <B>unique</B>
 Class:                  <B>Unique</B>
 Command-Line Switch:	<B>-unique</B>
 </pre>
 <UL>
 Boolean describing whether or not duplicate items are allowed in the combobox
 list. If true, then duplicates are not allowed to be inserted. If false, a
 duplicate entry causes selection of the item. Given in any of the forms
 acceptable to <B>Tcl_GetBoolean</B>. The default is true.
 </UL>
 </pre><HR>

 </pre><H2>DESCRIPTION</H2>
 <P>
 The <B>combobox</B> command creates an enhanced entry field widget with an
 optional associated label and a scrollable list. When an item is selected in
 the list area of a Combobox, its value is then displayed in the entry field
 text area. Functionally similar to an Optionmenu, the Combobox adds (optional)
 list scrolling and (optional) item editing and inserting capabilities.
 <P>
 There are two basic styles of Comboboxes (determined by the -dropdown option):
 dropdown and simple. The dropdown style adds an arrow button to the right of
 the entry field which when activated will pop up (and down) the scrolled
 listbox beneath the entry field. The simple (non-dropdown) Combobox
 permanently displays the listbox beneath the entry field and has no
 arrow button. Either style allows an optional entry field label.
 </pre><H2>METHODS</H2>
 <P>
 The <B>combobox</B> command creates a new Tcl command whose
 name is <I>pathName</I>. This
 command may be used to invoke various
 operations on the widget. It has the following general form:
 <pre>
 <I>pathName option </I>?<I>arg arg ...</I>?
 </pre>
 <I>Option</I> and the <I>arg</I>s
 determine the exact behavior of the command. The following
 commands are possible for Combobox widgets:
 </pre><H2>ASSOCIATED METHODS</H2>
 <P>
 <table cellpadding=5>
 <td valign=top>
 <B>icursor</B><br>
 </td>
 <td valign=top>
 <B>scan</B><br>
 </td>
 <td valign=top>
 </td>
 <td valign=top>
 </td>
 </table>
 <P>
 See the <A HREF="http://www.sco.com/Technology/tcl/man/tk_man/entry.n.html"> "entry" </A> manual entries for details on the above associated methods.
 <P>
 <table cellpadding=5>
 <td valign=top>
 <B>curselection</B><br>
 <B>xview</B><br>
 </td>
 <td valign=top>
 <B>index</B><br>
 <B>yview</B><br>
 </td>
 <td valign=top>
 <B>see</B><br>
 </td>
 <td valign=top>
 <B>size</B><br>
 </td>
 </table>
 <P>
 See the <A HREF="http://www.sco.com/Technology/tcl/man/tk_man/listbox.n.html"> "listbox" </A> manual entries for details on the above associated methods.
 <P>
 <table cellpadding=5>
 <td valign=top>
 <B>getcurselection</B><br>
 </td>
 <td valign=top>
 <B>justify</B><br>
 </td>
 <td valign=top>
 <B>sort</B><br>
 </td>
 <td valign=top>
 </td>
 </table>
 <P>
 See the <A HREF="scrolledlistbox.n.html"> "scrolledlistbox" </A> manual entries for details on the above associated
 methods.
 <P>
 </pre><H2>WIDGET-SPECIFIC METHODS</H2>
 <DL>
 <DT> <I>pathName <B>cget</B> <I>option</I>
 </I></B>
 <DD> Returns the current value of the configuration option given
 by <I>option</I>.
 <I>Option</I> may have any of the values accepted by the <B>combobox</B>
 command.
 </DL>
 <DL>
 <DT> <I>pathName <B>clear</B> ?<B>component</B>?
 </I></B>
 <DD> Clears the contents from one or both components. Valid component values
 are <B>list</B>, or <B>entry</B>.  With no component specified, both are cleared.
 </DL>
 <DL>
 <DT> <I>pathName</I> <B>configure</B> ?<I>option</I>? ?<I>value option value ...</I>?
 </I></B>
 <DD> Query or modify the configuration options of the widget.
 If no <I>option</I> is specified, returns a list describing all of
 the available options for <I>pathName</I> (see <B>Tk_ConfigureInfo</B> for
 information on the format of this list).  If <I>option</I> is specified
 with no <I>value</I>, then the command returns a list describing the
 one named option (this list will be identical to the corresponding
 sublist of the value returned if no <I>option</I> is specified).  If
 one or more <I>option-value</I> pairs are specified, then the command
 modifies the given widget option(s) to have the given value(s);  in
 this case the command returns an empty string.
 <I>Option</I> may have any of the values accepted by the <B>combobox</B>
 command.
 </DL>
 <DL>
 <DT> <I>pathName <B>delete <I>component</I> <I>first</I> ?<I>last</I>?
 </I></B>
 <DD> Delete one or more elements from a given component, <B>list</B> or <B>entry</B>.
 If a list item to be removed is currently selected (displayed in the entry
 field area), the entry field will be cleared.
 </DL>
 <DL>
 <DT> <I>pathName <B>get ?<I>index</I>? </B></I>
 </I></B>
 <DD> With no arguments, returns the contents currently in the entry
 field area. With a single argument, returns the contents of the
 listbox item at the indicated index.
 </DL>
 <DL>
 <DT> <I>pathName <B>insert</B> <I>component</I> <I>index</I> <I>element</I> ?<I>element element ...</I>?
 </I></B>
 <DD> Insert one or more new elements into the given component, <B>list</B> or
 <B>entry</B>, just before the element given by <I>index</I>.
 </DL>
 <DL>
 <DT> <I>pathName <B>selection</B> <I>option</I> <I>first</I> ?<I>last</I>?
 </I></B>
 <DD> Adjust the selection within the listbox component and updates the contents
 of the entry field component to the value of the selected item. See the
 "listbox" manual entry for more details on parameter options.
 </DL>
 </pre><H2>COMPONENTS</H2>
 <P>
 <pre>
 Name:                   <B>entry</B>
 Class:                  <B>Entry</B>
 </pre>
 <UL>
 Text entry area where the current selection is displayed. If the
 Combobox is editable and its state is normal, the user can edit the
 contents of this item.
 </UL>
 <P>
 <pre>
 Name:                   <B>list</B>
 Class:                  <B>Scrolledlistbox</B>
 </pre>
 <UL>
 Scrollable list which stores all the items which the user can select
 from. For dropdown Comboboxes, this component is hidden until the user pops it
 up by pressing on the arrow button to the right of the entry component. For
 simple Comboboxes this component is always visible just beneath the entry
 component.
 </UL>
 </pre><H2>DEFAULT BINDINGS</H2>
 <P>
 The Combobox generally has the same bindings as its primary component items -
 the Scrolledlistbox and Entryfield. However it also adds these:
 <P>
 [1] Button-1 mouse press on the arrow key of a dropdown Combobox causes the
 list to be popped up. If the combobox is non-editable, a Button-1 press on the
 entry field area will also pop up the list.
 <P>
 [2] Button-1 mouse press anywhere on the display removes a dropdown listbox
 which has been popped up, unless the keypress is upon one of the Combobox
 scrollbars which scrolls the list. If it is pressed upon an item in the list
 area, that item will be selected before the list is removed.
 <P>
 [3] Button-3 mouse press on the arrow key of a dropdown Combobox causes the
 next item to be selected. Shift-Button-3 causes the previous item to be
 selected.
 <P>
 [4] Escape keypress removes a dropdown list which has been popped up.
 <P>
 [5] The &lt;space&gt; and &lt;Return&gt; keystrokes select the current item. They also
 remove the popped up list for dropdown comboboxes.
 <P>
 [6] Up and Down arrow keypresses from the entry field and arrow button
 component cause the previous and next items in the listbox to be selected
 respectively. Ctl-P and Ctl-N are similarly mapped for emacs emulation.
 <P>
 [7] Entry field and arrow button component Shift-Up and Shift-Down arrow keys
 pop up and down the listbox of a dropdown Combobox. The arrow button component
 also maps &lt;Return&gt; and &lt;space&gt; similarly.

 </pre><H2>EXAMPLE</H2>
 <pre>
  proc selectCmd {} {
     puts stdout "[.cb2 getcurselection]"
  }

  #
  # Non-editable Dropdown Combobox
  #
  combobox .cb1 -labeltext Month: \\
      -selectioncommand {puts "selected: [.cb1 getcurselection]"} \\
      -editable false -listheight 185 -popupcursor hand1
  .cb1 insert list end Jan Feb Mar Apr May June Jul Aug Sept Oct Nov Dec

  #
  # Editable Dropdown Combobox
  #
  combobox .cb2 -labeltext "Operating System:" -selectioncommand selectCmd
  .cb2 insert list end Linux HP-UX SunOS Solaris Irix
  .cb2 insert entry end L

  pack .cb1 -padx 10 -pady 10 -fill x
  pack .cb2 -padx 10 -pady 10 -fill x

 </pre>
 </pre><H2>ORIGINAL AUTHOR</H2>
 John S. Sigler
 </pre><H2>CURRENT MAINTAINER</H2>
 Mitch Gorman (logain@erols.com)
 </pre><H2>KEYWORDS</H2>
 combobox, entryfield, scrolledlistbox, itk::Widget, entry, listbox, widget,
 iwidgets
	<TITLE>combobox - Create and manipulate combination box widgets</TITLE>
	<H1>combobox - Create and manipulate combination box widgets</H1>

	</pre><H2>SYNOPSIS</H2>
	<B>combobox<I> <I>pathName </I>?<I>options</I>?
	</pre><H2>INHERITANCE</H2>
	itk::Widget <- LabeledWidget <- Entryfield <- Combobox
	</pre><H2>STANDARD OPTIONS</H2>
	<P>
	<table cellpadding=5>
	<td valign=top>
	<B></B><br>
	cursor<br>
	highlightColor<br>
	insertWidth<br>
	insertWidth<br>
	selectBorderWidth<br>
	</td>
	<td valign=top>
	<B><br>
	justify<br>
	highlightThickness<br>
	insertBackground<br>
	insertBorderWidth<br>
	textVariable<br>
	</td>
	<td valign=top>
	background<br>
	exportSelection<br>
	relief<br>
	insertOffTime<br>
	selectForeground<br>
	</B></I><br>
	</td>
	<td valign=top>
	borderWidth<br>
	foreground<br>
	width<br>
	insertOnTime<br>
	selectBackground<br>
	</td>
	</table>
	<P>
	See the <A HREF="http://www.sco.com/Technology/tcl/man/tk_man/options.n.html"> "options" </A> manual entry for details on the standard options.
	</pre><H2>ASSOCIATED OPTIONS</H2>
	<P>
	<table cellpadding=5>
	<td valign=top>
	<B>hscrollmode</B><br>
	</td>
	<td valign=top>
	<B>textBackground</B><br>
	</td>
	<td valign=top>
	<B>textFont</B><br>
	</td>
	<td valign=top>
	<B>vscrollmode</B><br>
	</td>
	</table>
	<P>
	See the <A HREF="scrolledlistbox.n.html"> "scrolledlistbox" </A> manual entry for details on the above inherited
	options.
	<P>
	<table cellpadding=5>
	<td valign=top>
	<B>show</B><br>
	</td>
	<td valign=top>
	</td>
	<td valign=top>
	</td>
	<td valign=top>
	</td>
	</table>
	<P>
	See the <A HREF="http://www.sco.com/Technology/tcl/man/tk_man/entry.n.html"> "entry" </A> manual entry for details on the above inherited option.
	</pre><H2>INHERITED OPTIONS</H2>
	<P>
	<table cellpadding=5>
	<td valign=top>
	<B>childSitePos</B><br>
	<B>invalid</B><br>
	</td>
	<td valign=top>
	<B>command</B><br>
	<B>textBackground</B><br>
	</td>
	<td valign=top>
	<B>fixed</B><br>
	<B>textFont</B><br>
	</td>
	<td valign=top>
	<B>focusCommand</B><br>
	<B>validate</B><br>
	</td>
	</table>
	<P>
	See the <A HREF="entryfield.n.html"> "entryfield" </A> class manual entry for details on the inherited options.
	<P>
	<table cellpadding=5>
	<td valign=top>
	<B>labelBitmap</B><br>
	<B>labelPos</B><br>
	</td>
	<td valign=top>
	<B>labelFont</B><br>
	<B>labelText</B><br>
	</td>
	<td valign=top>
	<B>labelImage</B><br>
	<B>labelVariable</B><br>
	</td>
	<td valign=top>
	<B>labelMargin</B><br>
	</td>
	</table>
	<P>
	See the <A HREF="labeledwidget.n.html"> "labeledwidget" </A> class manual entry for details on the
	inherited options.
	</pre><H2>WIDGET-SPECIFIC OPTIONS</H2>
	<P>
	<pre>
	Name: <B>arrowRelief</B>
	Class: <B>Relief</B>
	Command-Line Switch: <B>-arrowrelief</B>
	</pre>
	<UL>
	Specifies the relief style to use for a dropdown Combobox's arrow
	button in a normal (not depressed) state. Acceptable values
	are <B>raised</B>, <B>sunken</B>, <B>flat</B>, <B>ridge</B>, and <B>groove</B>.
	Sunken is discouraged as this is the relief used to indicate a depressed
	state. This option has no effect on simple Comboboxes. The default is raised.
	</UL>
	<P>
	<pre>
	Name: <B>completion</B>
	Class: <B>Completion</B>
	Command-Line Switch: <B>-completion</B>
	</pre>
	<UL>
	Boolean given in any of the forms acceptable to <B>Tcl_GetBoolean</B> which
	determines whether insertions into the entry field, whether from the
	keyboard or programmatically via the <B>insert</B> method, are
	automatically completed with the first matching item from the listbox. The
	default is true.
	</UL>
	<P>
	<pre>
	Name: <B>dropdown</B>
	Class: <B>Dropdown</B>
	Command-Line Switch: <B>-dropdown</B>
	</pre>
	<UL>
	Boolean describing the Combobox layout style given in any of the forms
	acceptable to <B>Tcl_GetBoolean</B>. If true, the Combobox
	will be a dropdown style
	widget which displays an entry field and an arrow button which when activated
	will pop up a scrollable list of items. If false, a simple Combobox style
	will be used which has an entry field and a scrollable list beneath it
	which is always visible. Both styles allow an optional label for the entry
	field area. The default is true.
	</UL>
	<P>
	<pre>
	Name: <B>editable</B>
	Class: <B>Editable</B>
	Command-Line Switch: <B>-editable</B>
	</pre>
	<UL>
	Boolean describing whether or not the text entry area is editable
	by the user. If true the user can add items to the combobox by entering text
	into the entry area and then pressing Return. If false, the list of items is
	non-editable and can only be changed by calling the insert or delete
	methods. (The value in the entry field can still be modified by selecting
	from the list.) Given in any of the forms acceptable to <B>Tcl_GetBoolean</B>.
	The default is true.
	</UL>
	<P>
	<pre>
	Name: <B>grab</B>
	Class: <B>Grab</B>
	Command-Line Switch: <B>-grab</B>
	</pre>
	<UL>
	This option sets the grab scope for the appearance of the listbox in
	drop-down comboboxes. It can be either global or local. The default is
	local.
	</UL>
	<P>
	<pre>
	Name: <B>listHeight</B>
	Class: <B>Height</B>
	Command-Line Switch: <B>-listheight</B>
	</pre>
	<UL>
	Height of the listbox specified in any of the forms acceptable to
	<B>Tk_GetPixels</B>. The default is 150 pixels.
	</UL>
	<P>
	<pre>
	Name: <B>margin</B>
	Class: <B>Margin</B>
	Command-Line Switch: <B>-margin</B>
	</pre>
	<UL>
	Specifies the width in pixels between the entry component and the arrow button
	for a dropdown Combobox given in any of the forms acceptable to
	<B>Tk_GetPixels</B>. This option has no effect on a simple Combobox. The
	default is 1.
	</UL>
	<P>
	<pre>
	Name: <B>popupCursor</B>
	Class: <B>Cursor</B>
	Command-Line Switch: <B>-popupcursor</B>
	</pre>
	<UL>
	Specifies the cursor to be used for dropdown style listboxes. The value
	may have any of the forms acceptable to <B>Tk_GetCursor</B>. The default is
	arrow.
	</UL>
	<P>
	<pre>
	Name: <B>selectionCommand</B>
	Class: <B>SelectionCommand</B>
	Command-Line Switch: <B>-selectioncommand</B>
	</pre>
	<UL>
	Specifies a Tcl command procedure which is called when an item in the
	listbox area is selected. The item will be selected in the list, the listbox
	will be removed if it is a dropdown Combobox, and the selected item's
	text will be inserted into the entry field before the -selectioncommand proc is
	called. The default is {}.
	</UL>
	<P>
	<pre>
	Name: <B>state</B>
	Class: <B>State</B>
	Command-Line Switch: <B>-state</B>
	</pre>
	<UL>
	Specifies the overall state of the Combobox megawidget. Can be either
	normal or disabled. If the Combobox is disabled, no text can be entered
	into the entry field, no selection can be made in the listbox, and the
	arrowBtn component is disabled. The default is normal.
	</UL>
	<P>
	<pre>
	Name: <B>unique</B>
	Class: <B>Unique</B>
	Command-Line Switch: <B>-unique</B>
	</pre>
	<UL>
	Boolean describing whether or not duplicate items are allowed in the combobox
	list. If true, then duplicates are not allowed to be inserted. If false, a
	duplicate entry causes selection of the item. Given in any of the forms
	acceptable to <B>Tcl_GetBoolean</B>. The default is true.
	</UL>
	</pre><HR>

	</pre><H2>DESCRIPTION</H2>
	<P>
	The <B>combobox</B> command creates an enhanced entry field widget with an
	optional associated label and a scrollable list. When an item is selected in
	the list area of a Combobox, its value is then displayed in the entry field
	text area. Functionally similar to an Optionmenu, the Combobox adds (optional)
	list scrolling and (optional) item editing and inserting capabilities.
	<P>
	There are two basic styles of Comboboxes (determined by the -dropdown option):
	dropdown and simple. The dropdown style adds an arrow button to the right of
	the entry field which when activated will pop up (and down) the scrolled
	listbox beneath the entry field. The simple (non-dropdown) Combobox
	permanently displays the listbox beneath the entry field and has no
	arrow button. Either style allows an optional entry field label.
	</pre><H2>METHODS</H2>
	<P>
	The <B>combobox</B> command creates a new Tcl command whose
	name is <I>pathName</I>. This
	command may be used to invoke various
	operations on the widget. It has the following general form:
	<pre>
	<I>pathName option </I>?<I>arg arg ...</I>?
	</pre>
	<I>Option</I> and the <I>arg</I>s
	determine the exact behavior of the command. The following
	commands are possible for Combobox widgets:
	</pre><H2>ASSOCIATED METHODS</H2>
	<P>
	<table cellpadding=5>
	<td valign=top>
	<B>icursor</B><br>
	</td>
	<td valign=top>
	<B>scan</B><br>
	</td>
	<td valign=top>
	</td>
	<td valign=top>
	</td>
	</table>
	<P>
	See the <A HREF="http://www.sco.com/Technology/tcl/man/tk_man/entry.n.html"> "entry" </A> manual entries for details on the above associated methods.
	<P>
	<table cellpadding=5>
	<td valign=top>
	<B>curselection</B><br>
	<B>xview</B><br>
	</td>
	<td valign=top>
	<B>index</B><br>
	<B>yview</B><br>
	</td>
	<td valign=top>
	<B>see</B><br>
	</td>
	<td valign=top>
	<B>size</B><br>
	</td>
	</table>
	<P>
	See the <A HREF="http://www.sco.com/Technology/tcl/man/tk_man/listbox.n.html"> "listbox" </A> manual entries for details on the above associated methods.
	<P>
	<table cellpadding=5>
	<td valign=top>
	<B>getcurselection</B><br>
	</td>
	<td valign=top>
	<B>justify</B><br>
	</td>
	<td valign=top>
	<B>sort</B><br>
	</td>
	<td valign=top>
	</td>
	</table>
	<P>
	See the <A HREF="scrolledlistbox.n.html"> "scrolledlistbox" </A> manual entries for details on the above associated
	methods.
	<P>
	</pre><H2>WIDGET-SPECIFIC METHODS</H2>
	<DL>
	<DT> <I>pathName <B>cget</B> <I>option</I>
	</I></B>
	<DD> Returns the current value of the configuration option given
	by <I>option</I>.
	<I>Option</I> may have any of the values accepted by the <B>combobox</B>
	command.
	</DL>
	<DL>
	<DT> <I>pathName <B>clear</B> ?<B>component</B>?
	</I></B>
	<DD> Clears the contents from one or both components. Valid component values
	are <B>list</B>, or <B>entry</B>. With no component specified, both are cleared.
	</DL>
	<DL>
	<DT> <I>pathName</I> <B>configure</B> ?<I>option</I>? ?<I>value option value ...</I>?
	</I></B>
	<DD> Query or modify the configuration options of the widget.
	If no <I>option</I> is specified, returns a list describing all of
	the available options for <I>pathName</I> (see <B>Tk_ConfigureInfo</B> for
	information on the format of this list). If <I>option</I> is specified
	with no <I>value</I>, then the command returns a list describing the
	one named option (this list will be identical to the corresponding
	sublist of the value returned if no <I>option</I> is specified). If
	one or more <I>option-value</I> pairs are specified, then the command
	modifies the given widget option(s) to have the given value(s); in
	this case the command returns an empty string.
	<I>Option</I> may have any of the values accepted by the <B>combobox</B>
	command.
	</DL>
	<DL>
	<DT> <I>pathName <B>delete <I>component</I> <I>first</I> ?<I>last</I>?
	</I></B>
	<DD> Delete one or more elements from a given component, <B>list</B> or <B>entry</B>.
	If a list item to be removed is currently selected (displayed in the entry
	field area), the entry field will be cleared.
	</DL>
	<DL>
	<DT> <I>pathName <B>get ?<I>index</I>? </B></I>
	</I></B>
	<DD> With no arguments, returns the contents currently in the entry
	field area. With a single argument, returns the contents of the
	listbox item at the indicated index.
	</DL>
	<DL>
	<DT> <I>pathName <B>insert</B> <I>component</I> <I>index</I> <I>element</I> ?<I>element element ...</I>?
	</I></B>
	<DD> Insert one or more new elements into the given component, <B>list</B> or
	<B>entry</B>, just before the element given by <I>index</I>.
	</DL>
	<DL>
	<DT> <I>pathName <B>selection</B> <I>option</I> <I>first</I> ?<I>last</I>?
	</I></B>
	<DD> Adjust the selection within the listbox component and updates the contents
	of the entry field component to the value of the selected item. See the
	"listbox" manual entry for more details on parameter options.
	</DL>
	</pre><H2>COMPONENTS</H2>
	<P>
	<pre>
	Name: <B>entry</B>
	Class: <B>Entry</B>
	</pre>
	<UL>
	Text entry area where the current selection is displayed. If the
	Combobox is editable and its state is normal, the user can edit the
	contents of this item.
	</UL>
	<P>
	<pre>
	Name: <B>list</B>
	Class: <B>Scrolledlistbox</B>
	</pre>
	<UL>
	Scrollable list which stores all the items which the user can select
	from. For dropdown Comboboxes, this component is hidden until the user pops it
	up by pressing on the arrow button to the right of the entry component. For
	simple Comboboxes this component is always visible just beneath the entry
	component.
	</UL>
	</pre><H2>DEFAULT BINDINGS</H2>
	<P>
	The Combobox generally has the same bindings as its primary component items -
	the Scrolledlistbox and Entryfield. However it also adds these:
	<P>
	[1] Button-1 mouse press on the arrow key of a dropdown Combobox causes the
	list to be popped up. If the combobox is non-editable, a Button-1 press on the
	entry field area will also pop up the list.
	<P>
	[2] Button-1 mouse press anywhere on the display removes a dropdown listbox
	which has been popped up, unless the keypress is upon one of the Combobox
	scrollbars which scrolls the list. If it is pressed upon an item in the list
	area, that item will be selected before the list is removed.
	<P>
	[3] Button-3 mouse press on the arrow key of a dropdown Combobox causes the
	next item to be selected. Shift-Button-3 causes the previous item to be
	selected.
	<P>
	[4] Escape keypress removes a dropdown list which has been popped up.
	<P>
	[5] The <space> and <Return> keystrokes select the current item. They also
	remove the popped up list for dropdown comboboxes.
	<P>
	[6] Up and Down arrow keypresses from the entry field and arrow button
	component cause the previous and next items in the listbox to be selected
	respectively. Ctl-P and Ctl-N are similarly mapped for emacs emulation.
	<P>
	[7] Entry field and arrow button component Shift-Up and Shift-Down arrow keys
	pop up and down the listbox of a dropdown Combobox. The arrow button component
	also maps <Return> and <space> similarly.

	</pre><H2>EXAMPLE</H2>
	<pre>
	proc selectCmd {} {
	puts stdout "[.cb2 getcurselection]"
	}

	#
	# Non-editable Dropdown Combobox
	#
	combobox .cb1 -labeltext Month: \\
	-selectioncommand {puts "selected: [.cb1 getcurselection]"} \\
	-editable false -listheight 185 -popupcursor hand1
	.cb1 insert list end Jan Feb Mar Apr May June Jul Aug Sept Oct Nov Dec

	#
	# Editable Dropdown Combobox
	#
	combobox .cb2 -labeltext "Operating System:" -selectioncommand selectCmd
	.cb2 insert list end Linux HP-UX SunOS Solaris Irix
	.cb2 insert entry end L

	pack .cb1 -padx 10 -pady 10 -fill x
	pack .cb2 -padx 10 -pady 10 -fill x

	</pre>
	</pre><H2>ORIGINAL AUTHOR</H2>
	John S. Sigler
	</pre><H2>CURRENT MAINTAINER</H2>
	Mitch Gorman (logain@erols.com)
	</pre><H2>KEYWORDS</H2>
	combobox, entryfield, scrolledlistbox, itk::Widget, entry, listbox, widget,
	iwidgets