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-->  <!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"><concept id="GUID-A5756C5F-9C93-4949-8B60-03DCA1BAF683" xml:lang="en"><title>Form

items</title><prolog><metadata><keywords></keywords></metadata></prolog><conbody>

<p>Empty items (that contain no data) can be hidden in a form's View state.

However, this is not a requirement; forms can be designed either way, whichever

is better for the given application.</p>

<p>Unlike ordinary list items, the form items may have different sizes in

the layout but only in the Edit state. A long data field may occupy more than

one line in the Edit state, but in the View state it is truncated to the first

line.</p>

<p>The user may be able to add and remove form items. This is done with commands

in the Options menu.</p>

<p>Form items always have a label. The label has a text part, or a text and

a graphical part; however, all items in one form must have the same column

layout (see <xref href="GUID-CB548959-A1D6-4585-B8E3-B09E37E0CB43.dita">List layouts</xref> for

detailed information about layouts).</p>

<p>The following item types can be used in a form:</p>

<ul>

<li><p>Text field (alphanumeric or numeric content) </p></li>

<li><p>Pop-up field </p></li>

<li><p>Slider</p></li>

</ul>

<p>Any combination of these types is possible within one form.</p>

<p>When a form is in the Edit state, the user can move the focus up and down

like in a list. The highlight in the Edit state is different from the highlight

in the View state, acting as a visual cue. The cursor blinks in the text field

that is in focus. There is no need to save each field separately; the user

can browse and modify the fields in any order and then accept all modifications.

During the browsing of a form in the Edit state, the keypad functions are

as follows:</p>

<table id="GUID-437191CE-D3E0-4CFB-875C-9C308B18F7E9"><title>Default key events

in editing state of a form</title>

<tgroup cols="2"><colspec colname="col1"></colspec><colspec colname="col2"></colspec>

<thead>

<row>

<entry>Key</entry>

<entry>Action</entry>

</row>

</thead>

<tbody>

<row>

<entry><p>Arrow up / down</p></entry>

<entry><p>Move the focus between form items (when in a text field, move the

cursor within an item line by line).</p></entry>

</row>

<row>

<entry><p>Arrow left / right</p></entry>

<entry><ul>

<li><p>In a pop-up field: change the value without opening the list. </p></li>

<li><p>In a text field: move the cursor character by character. </p></li>

<li><p>In a slider: adjust the slider value.</p></li>

</ul></entry>

</row>

<row>

<entry><p>Selection key</p></entry>

<entry><ul>

<li><p>In a pop-up field: opens the list. </p></li>

<li><p>In a text field: opens the context sensitive <b>Options</b> menu or

no action.</p></li>

</ul></entry>

</row>

<row>

<entry><p>Left softkey (Options)</p></entry>

<entry><p>Opens the <b>Options</b> menu (in a form without the <b>Options</b> menu,

the left softkey is <b>Done</b>).</p></entry>

</row>

<row>

<entry><p>Right softkey (Done)</p></entry>

<entry><p>Accepts the contents and returns to the previous state (in a form

without the Options menu, the right softkey is Cancel.)</p></entry>

</row>

<row>

<entry><p>Clear</p></entry>

<entry><ul>

<li><p>Pop-up: ignored. </p></li>

<li><p>Text: deletes characters. </p></li>

<li><p>Slider: ignored.</p></li>

</ul></entry>

</row>

<row>

<entry><p>Edit</p></entry>

<entry><ul>

<li><p>Pop-up: ignored. </p></li>

<li><p>Text: opens the editing menu; selects text. </p></li>

<li><p>Slider: ignored.</p></li>

</ul></entry>

</row>

<row>

<entry><p>Numeric keypad</p></entry>

<entry><ul>

<li><p>Pop-up: ignored. </p></li>

<li><p>Text: input. </p></li>

<li><p>Slider: ignored.</p></li>

</ul></entry>

</row>

<row>

<entry><p>Other keys</p></entry>

<entry><p>The default action of the key.</p></entry>

</row>

</tbody>

</tgroup>

</table>

<p>The field types are described in the following table:</p>

<table id="GUID-A22394D3-9C39-4DC2-8A65-255F985F97E9"><title> Form field types</title>

<tgroup cols="2"><colspec colname="col1"></colspec><colspec colname="col2"></colspec>

<thead>

<row>

<entry>Field</entry>

<entry>Description</entry>

</row>

</thead>

<tbody>

<row>

<entry><p>Text field</p></entry>

<entry><p>A text field contains some type of numeric or alphanumeric data.

It can be edited directly using the usual editing functions when the form

is in the Edit state. The text field can expand to more than one lines if

necessary.</p><p>In the View state, a text field looks identical to a corresponding

list item.</p></entry>

</row>

<row>

<entry><p>Pop-up field</p></entry>

<entry><p>A pop-up field offers the possibility to choose one value from a

pre-defined list. In the View state, a pop-up field looks identical to a list

item; the text is the current value of the field. In the Edit state, it has

a distinct look that identifies the field as a pop-up list.</p><p>To edit

an item in the Edit state, the user can press the Selection key, which opens

a menu list that contains the available values. The highlight is on the current

value. When the list is open, the softkeys are <b>OK</b> and <b>Cancel</b>,

as usual with a menu list. Both the softkeys return to the Edit state in the

form.</p><p>A pop-up field may also allow the user to enter a textual value

in addition to the pre-defined values. In this case, the last option is named

for example <b>Other</b>, and selecting it opens a Data query.</p><p>See figure

below.</p></entry>

</row>

<row>

<entry><p>Slider</p></entry>

<entry><p>With a slider, the user can adjust a numeric value (although it

is not necessary to present the actual value to the user as a number). In

the View state, the item is presented as a textual item. In the Edit state,

the value of the slider is immediately adjustable using the Arrow left and

Arrow right keys.</p></entry>

</row>

</tbody>

</tgroup>

</table>

<fig id="GUID-AA0170E3-BBB2-478A-A9A1-24C48BCF917F">

<title>Pop-up field</title>

<image href="GUID-DC4E42CA-2A65-44D7-8DBE-386F60F998A0_d0e81272_href.png" scale="40" placement="inline"></image>

</fig>

<section><title>Using forms in C++ applications</title><p>The

API to use for creating forms is the Form

API. For implementation information, see Using

the Form API.</p></section>

</conbody></concept>