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<TITLE>tixComboBox - Create and manipulate tixComboBox widgets</TITLE>

<Center><H2>tixComboBox - Create and manipulate tixComboBox widgets</H2></Center><hr>

<P>

</pre><H3>SYNOPSIS</H3>

<B>tixComboBox<I> <I>pathName ?<I>options</I></B>?

<P>

</pre><H3>SUPER-CLASS</H3>

The <B>TixComboBox</B></I> class is derived from the <B>TixLabelWidget</B></I>

class and inherits all the commands, options and subwidgets

of its super-class.

</pre><H3>STANDARD OPTIONS</H3>

<B>TixComboBox</B></I> supports all the standard options of a frame widget.

See the options(n) manual entry for details on the standard options.

<P>

</pre><H3>WIDGET-SPECIFIC OPTIONS</H3>

<P>

<pre><code><code><code>

Name:           <B>anchor</B></I>

Class:          <B>Anchor</B></I>

Switch:         <B>-anchor</B></I>

</code></code></code></pre>

<UL>

Specifies how the string inside the entry subwidget should be aligned.

Only the values "w" or "e" are allowed. When set the "w", the entry is

aligned to its beginning. When set to "e", it is aligned to its end.

</UL>

<P>

<pre><code><code><code>

Name:           <B>arrowBitmap</B></I>

Class:          <B>ArrowBitmap</B></I>

Switch:         <B>-arrowbitmap</B></I>

</code></code></code></pre>

<UL>

Specifies the bitmap to be used in the arrow button beside the entry

widget. The default is an downward arrow bitmap in the file

$tix_library/bitmaps/cbxarrow

</UL>

<P>

<pre><code><code><code>

Name:           <B>browseCmd</B></I>

Class:          <B>BrowseCmd</B></I>

Switch:         <B>-browsecmd</B></I>

</code></code></code></pre>

<UL>

Specifies the command to be called when the user browses through the

listbox. This command can be used to provide instant feedback when the

user examines items in the listbox before committing a choice.

</UL>

<P>

<pre><code><code><code>

Name:           <B>command</B></I>

Class:          <B>Command</B></I>

Switch:         <B>-command</B></I>

</code></code></code></pre>

<UL>

Specifies the command to be called when the ComboBox is invoked

or when the <B>-value</B></I> of the ComboBox is changed.

</UL>

<P>

<pre><code><code><code>

Name:           <B>crossBitmap</B></I>

Class:          <B>CrossBitmap</B></I>

Switch:         <B>-crossbitmap</B></I>

</code></code></code></pre>

<UL>

Specifies the bitmap to be used in the "cross" button to the left of

the entry widget. The default is a bitmap in the file

$tix_library/bitmaps/cross

</UL>

<P>

<pre><code><code><code>

Name:           <B>disableCallback</B></I>

Class:          <B>DisableCallback</B></I>

Switch:         <B>-disablecallback</B></I>

</code></code></code></pre>

<UL>

A boolean value indicating whether callbacks should be disabled. When

set to true, the TCL command specified by the <B>-command</B></I> option

is not executed when the <B>-value</B></I> of the ComboBox.

changes.

</UL>

<P>

<pre><code><code><code>

Name:           <B>disabledforeground</B></I>

Class:          <B>DisabledForeground</B></I>

Switch:         <B>-disabledforeground</B></I>

</code></code></code></pre>

<UL>

Specifies the foreground color to be used when the ComboBox is disabled.

</UL>

<P>

<pre><code><code><code>

Name:           <B>dropdown</B></I>

Class:          <B>Dropdown</B></I>

Switch:         <B>-dropdown</B></I>

</code></code></code></pre>

<UL>

A Boolean value specifying the style of the ComboBox. When set to

"true", the listbox is only displayed temporarily when the arrow

button is pressed. When set to "false", the listbox is always

displayed.

</UL>

<P>

<pre><code><code><code>

Name:           <B>editable</B></I>

Class:          <B>Editable</B></I>

Switch:         <B>-editable</B></I>

</code></code></code></pre>

<UL>

Specifies whether the user is allowed to type into the entry subwidget of

the ComboBox.

</UL>

<P>

<pre><code><code><code>

Name:           <B>fancy</B></I>

Class:          <B>Fancy</B></I>

Switch:         <B>-fancy</B></I>

</code></code></code></pre>

<UL>

A Boolean value specifying whether the cross and tick button

subwidgets should be shown.

</UL>

<P>

<pre><code><code><code>

Name:           <B>grab</B></I>

Class:          <B>Grab</B></I>

Switch:         <B>-grab</B></I>

</code></code></code></pre>

<UL>

Specifies the pointer grabbing policy when the listbox is popped up.

Only values "global", "local" or "none" are allowed. By default global

grab is used. However, when you are developing your application, you

may want to use only local grabbing so that in the event of errors,

</UL>

<P>

<pre><code><code><code>

Name:           <B>historyLimit</B></I>

Class:          <B>historyLimit</B></I>

Switch:         <B>-historylimit</B></I>

Alias:          <B>-histlimit</B></I>

</code></code></code></pre>

<UL>

Specifies how many previous user inputs can be stored in the history

list.

</UL>

<P>

<pre><code><code><code>

Name:           <B>history</B></I>

Class:          <B>History</B></I>

Switch:         <B>-history</B></I>

</code></code></code></pre>

<UL>

A Boolean value specifying whether previous user inputs should be

stored in the history list.

</UL>

<P>

<pre><code><code><code>

Name:           <B>label</B></I>

Class:          <B>Label</B></I>

Switch:         <B>-label</B></I>

</code></code></code></pre>

<UL>

Specifies the string to display as the label of this ComboBox widget.

</UL>

<P>

<pre><code><code><code>

Name:           <B>labelSide</B></I>

Class:          <B>LabelSide</B></I>

Switch:         <B>-labelside</B></I>

</code></code></code></pre>

<UL>

Specifies where the label should be displayed relative to the entry

subwidget. Valid options are: <B>top</B></I>, <B>left</B></I>, <B>right</B></I>,

<B>bottom</B></I>, <B>none</B></I> or <B>acrosstop</B></I>.

</UL>

<P>

<pre><code><code><code>

Name:           <B>listCmd</B></I>

Class:          <B>listCmd</B></I>

Switch:         <B>-listcmd</B></I>

</code></code></code></pre>

<UL>

Specifies a TCL command to be called every time when the listbox pops

up. This option allows you to fill up the listbox on-demand. This

option is ignored when the listbox is not in the <B>dropdown</B></I> style.

</UL>

<P>

<pre><code><code><code>

Name:           <B>listWidth</B></I>

Class:          <B>listWidth</B></I>

Switch:         <B>-listwidth</B></I>

</code></code></code></pre>

<UL>

If set, this option controls the width of the listbox subwidget when

it is popped up. The option is ignored when the listbox is not in the

<B>dropdown</B></I> style.

</UL>

<P>

<pre><code><code><code>

Name:           <B>prunehistory</B></I>

Class:          <B>PruneHistory</B></I>

Switch:         <B>-prunehistory</B></I>

</code></code></code></pre>

<UL>

Specifies whether duplicated previous user inputs should be pruned

from the the history list. Only Boolean values are allowed.

</UL>

<P>

<pre><code><code><code>

Name:           <B>selection</B></I>

Class:          <B>Selection</B></I>

Switch:         <B>-selection</B></I>

</code></code></code></pre>

<UL>

Contains the selection in the ComboBox (the string displayed in the

entry subwidget). Depending on the <B>-selectmode</B></I>, the selection

of a ComboBox may be different than its <B>-value</B></I>.

</UL>

<P>

<pre><code><code><code>

Name:           <B>selection</B></I>

Class:          <B>Selection</B></I>

Switch:         <B>-selection</B></I>

</code></code></code></pre>

<UL>

This option stores the temporary selection. When the user types in a

text string inside the entry widget, that string is considered as a

temporary input and is stored inside the <B>-selection</B></I> option. The

<B>-value</B></I> option is updated only when the user presses the return

key.

</UL>

<P>

<pre><code><code><code>

Name:           <B>selectMode</B></I>

Class:          <B>SelectMode</B></I>

Switch:         <B>-selectmode</B></I>

</code></code></code></pre>

<UL>

Specifies the how the combobox responds to the mouse button events in

the listbox subwidget; can eithet be <B>"browse"</B></I> or

<B>"immediate"</B></I>. The default <B>-selectmode</B></I> is "browse". See the

<B>BINDINGS</B></I> section below.

</UL>

<P>

<pre><code><code><code>

Name:           <B>state</B></I>

Class:          <B>State</B></I>

Switch:         <B>-state</B></I>

</code></code></code></pre>

<UL>

Specifies the whether the ComboBox is normal or disabled.

Only the values "normal" and "disabled" are recognized.

</UL>

<P>

<pre><code><code><code>

Name:           <B>tickBitmap</B></I>

Class:          <B>tickBitmap</B></I>

Switch:         <B>-tickbitmap</B></I>

</code></code></code></pre>

<UL>

Specifies the bitmap to be used in the "tick" button to the left of

the entry widget. The default is a bitmap in the file

$tix_library/bitmaps/tick

</UL>

<P>

<pre><code><code><code>

Name:           <B>validateCmd</B></I>

Class:          <B>ValidateCmd</B></I>

Switch:         <B>-validatecmd</B></I>

</code></code></code></pre>

<UL>

Specifies a TCL command to be called when the <B>-value</B></I> of the

ComboBox is about to change. This command is called with one parameter

-- the new <B>-value</B></I> entered by the user. This command is to

validate this new value by returning a value it deems valid.

</UL>

<P>

<pre><code><code><code>

Name:           <B>value</B></I>

Class:          <B>Value</B></I>

Switch:         <B>-value</B></I>

</code></code></code></pre>

<UL>

Specifies the string to be displayed in the entry subwidget of the

ComboBox. When queried, the returned value is the last value

selected by the user. When the <B>-value</B></I> option is changed as a

result of the <B>config -value</B></I> widget command, the TCL command

specified by the <B>-command</B></I> option is called.

</UL>

<P>

<pre><code><code><code>

Name:           <B>variable</B></I>

Class:          <B>Variable</B></I>

Switch:         <B>-variable</B></I>

</code></code></code></pre>

<UL>

Specifies the global variable in which the value of the

ComboBox should be stored. The value of the ComboBox

will be automatically updated when this variable is changed.

</UL>

</pre><H3>SUBWIDGETS</H3>

<P>

<pre><code><code><code>

Name:           <B>arrow</B></I>

Class:          <B>Button</B></I>

</code></code></code></pre>

<UL>

The down arrow button.

</UL>

<P>

<pre><code><code><code>

Name:           <B>cross</B></I>

Class:          <B>Button</B></I>

</code></code></code></pre>

<UL>

The cross button. Available only when <B>-fancy</B></I> is set.

</UL>

<P>

<pre><code><code><code>

Name:           <B>entry</B></I>

Class:          <B>Entry</B></I>

</code></code></code></pre>

<UL>

The entry that shows the value of this <B>tixControl</B></I>.

</UL>

<P>

<pre><code><code><code>

Name:           <B>label</B></I>

Class:          <B>Label</B></I>

</code></code></code></pre>

<UL>

The label subwidget.

</UL>

<P>

<pre><code><code><code>

Name:           <B>listbox</B></I>

Class:          <B>Listbox</B></I>

</code></code></code></pre>

<UL>

The listbox that holds all the list entries.

</UL>

<P>

<pre><code><code><code>

Name:           <B>slistbox</B></I>

Class:          <B>TixScrolledListBox</B></I>

</code></code></code></pre>

<UL>

The scrolled-listbox that provides the scrollbars.

</UL>

<P>

<pre><code><code><code>

Name:           <B>tick</B></I>

Class:          <B>Button</B></I>

</code></code></code></pre>

<UL>

The tick button. Available only when <B>-fancy</B></I> is set.

</UL>

</pre><HR>

</pre><H3>DESCRIPTION</H3>

<P>

The <B>tixComboBox</B></I> command creates a new window (given by the

<I>pathName</I></B> argument) and makes it into a <B>tixComboBox</B></I> widget.

Additional options, described above, may be specified on the command

line or in the option database to configure aspects of the

ComboBox such as its cursor and relief.

The Tix ComboBox widget is similar to the combo box control in

MS Windows. The user can select a choice by either typing in the entry

subwdget or selecting from the listbox subwidget.

</pre><H3>WIDGET COMMANDS</H3>

<P>

The <B>tixComboBox</B></I> command creates a new Tcl command whose name is the

may be used to invoke various operations on the widget. It has the

following general form:

<pre>

<I>pathName option </I></B>?<I>arg arg ...</I></B>?

<P>

</pre>

<I>PathName</I></B> is the name of the command, which is the same as the

determine the exact behavior of the command.  The following commands

are possible for ComboBox widgets:

<DL>

<DT> <I>pathName <B>addhistory<I> string </I></B>

</I></B>

<DD> Add the string to the beinning of the listbox.

</DL>

<DL>

<DT> <I>pathName <B>appendhistory<I> string </I></B>

</I></B>

<DD> Append the string to the end of the listbox.

</DL>

<DL>

<DT> <I>pathName <B>cget</B></I> <I>option</I></B>

</I></B>

<DD> Returns the current value of the configuration option given by

<I>option</I></B>.  <I>Option</I></B> may have any of the values accepted by the

<B>tixComboBox</B></I> command.

</DL>

<DL>

<DT> <I>pathName <B>configure</B></I> ?<I>option</I></B>? <I>?value option value ...</I></B>?

</I></B>

<DD> Query or modify the configuration options of the widget.  If no

<I>option</I></B> is specified, returns a list describing all of the

available options for <I>pathName</I></B> (see <B>Tk_ConfigureInfo</B></I> for

information on the format of this list).  If <I>option</I></B> is specified

with no <I>value</I></B>, 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></B> is specified).  If

one or more <I>option-value</I></B> 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></B> may have

any of the values accepted by the <B>tixComboBox</B></I> command.

</DL>

<DL>

<DT> <I>pathName <B>flash <I>index string</I></B>

</I></B>

<DD> Flashes the ComboBox. <B>flash</B></I> is usually called by a

<I>-command</I></B> procedure to acknowledge to the user that he has

selected a value for the ComboBox.

</DL>

<DL>

<DT> <I>pathName <B>insert <I>index string</I></B>

</I></B>

<DD> Insert the <I> string</I></B> into the listbox at the specified index.

<I>index</I></B> must be a valid listbox index.

</DL>

<DL>

<DT> <I>pathName <B>pick <I>index</I></B>

</I></B>

<DD> Set the (<I>index</I></B>)th item in the listbox to be the current value of

the ComboBox. As a result, the <I>value</I></B> of the ComboBox is changed

and the TCL command sepcified by the <I>-command</I></B> option will be

called.

</DL>

<DL>

<DT> <I>pathName <B>subwidget <I> name ?args?</I></B>

</I></B>

<DD> When no options are given, returns the pathname of the subwidget of

the specified name.

When options are given, the widget command of the specified subwidget will

be called with these options.

</DL>

<P>

</pre><H3>BINDINGS</H3>

<P>

<UL>

[1] <BR>

If the <B>-selectmode</B></I> is "immediate", when the user enters a

keystroke, clicks on an item or drags the mouse pointer in the

listbox, the <B>-value</B></I> of the ComboBox will be immediately set to

this item and the <B>-command</B></I> procedure will be called.

</UL>

<UL>

[2] <BR>

If the <B>-selectmode</B></I> is "browse", when the user enters a

keystroke, clicks on an item or drags the mouse pointer in the

listbox, the <B>-selection</B></I> of the ComboBox will be immediately set

to the new content of the entry subwidget; also the <B>-browsecmd</B></I>

procedure will be called. The <B>-value</B></I> option will be changed

only when the user invokes the ComboBox (see [3] below). If the user

presses the &lt;Escape&gt; key at any time, any new <B>-selection</B></I> will

be ignored and the text inside the entry subwidget will be restored to

the current <B>-value</B></I> of the ComboBox.

</UL>

<UL>

[3] <BR>

If the <B>-dropdown</B></I> option is true, the user can invoke the

ComboBox by releasing the left mouse button over the desired item in

the listbox. If the <B>-dropdown</B></I> option is false, the user can

invoke the ComboBox by double-clicking over the desired item in the

listbox. In both cases, the user can also invoke the listbox by

pressing the <Return> or <Tab> key inside the entry subwidget, or

switching the input focus to another widget inside the same toplevel

widget

</UL>

<P>

</pre><H3>BUGS</H3>

<P>

Starting from Tix vetsion 4.0, the default <B>-value</B></I> of the

ComboBox is the empty string. If you want the ComboBox to show a

string by default, you must configure its <B>-value</B></I> option

explicitly.

<P>

</pre><H3>KEYWORDS</H3>

Tix(n), ComboBox(n), listbox(n)

<hr><i>Last modified Sun Jan 19 22:34:20 EST 1997 </i> ---

<i>Serial 853731296</i>