Introduction
Allows the user to choose a single value from a list of pre-defined values (see the spec). The list of pre-defined items can be specified by either item
(see the spec) or itemset
(see the spec) elements. You can visually group these pre-defined items by using the choices
(see the spec) element to contain them. Note, some representations of the select1
element do not support visual grouping.
Attributes
- UI Common
- appearance - the value of this attribute gives a hint to the XForms processor as to which type of widget(s) to use to represent this control.
- accesskey - used to specify the keyboard shortcut for focusing this control.
- Single-Node Binding
- Special
- selection - this attribute, when set to 'open', allows the user to provide free entry to the list. Possible values are
open
andclosed
, default isclosed
(see #Representations section to refer if the attribute is supported for every representation). - incremental - supported, default value is
true
- selection - this attribute, when set to 'open', allows the user to provide free entry to the list. Possible values are
Properties
- selection - see corresponding attribute
- incremental - see corresponding attribute
Type restrictions
The select1
element can be bound to a node containing simple content. The data binding restriction to simple content may be relaxed when an itemset
element is used, which allows the available choices to be obtained from an XForms Model. The relaxation happens when the itemset
element specifies the item value using a copy
(see spec) element. This is because a copy
element can be used to add a subtree of nodes underneath the element that the select1
control is bound to.
Representations
The XForms select1
element can be represented by the following widgets for the specified appearance
attribute values:
- combobox - default representation (xhtml/xul)
- listbox - used when appearance = 'compact' (xhtml/xul)
- radio group - used when appearance = 'full' (xhtml/xul)
combobox
Displaying a combobox is the default representation (xhtml/xul).
XHTML widget characteristics
- analogous widgets is <html:select/>
- visual grouping by
choices
element is supported - selection="open" is supported
- if
incremental
attribute value isfalse
, the bound node is updated when theselect1
control is blurred (i.e. loses focus), otherwise it is updated upon item selection
XUL widget characteristics
- analogous widgets are <html:select/> and <xul:menulist/>
- visual grouping by
choices
element isn't implemented - selection="open" attribute isn't supported
- if
incremental
attribute value isfalse
, the bound node is updated when theselect
control is blurred (i.e. loses focus), otherwise it is updated upon item selection
listbox
The select1
is represented as listbox (xhtml/xul).
Characteristics
- analogous widgets are <html:select size="5"/> and <xul:listbox/>
- visual grouping by
choices
element isn't implemented - selection="open" attribute isn't supported
- if
incremental
attribute value isfalse
, the bound node is updated when theselect
control is blurred (i.e. loses focus), otherwise it is updated upon item selection
radio group
The select
is represented as group of radios (xhtml/xul).
Characteristics
-
appearance
attribute contains the valuefull
- there are no analogue widgets in XHTML or in XUL
- visual grouping by
choices
element is supported - selection="open" attribute isn't supported
- if
incremental
attribute value isfalse
then bound node is updated whenitem
is blurred
Examples
<xf:model> <xf:instance> <data xmlns=""> <values>g</values> </data> </xf:instance> </xf:model> <xf:select1 ref="/data/values"> <xf:choices> <xf:label>Green colors</xf:label> <xf:item> <xf:label>Pale green</xf:label> <xf:value>pg</xf:value> </xf:item> <xf:item> <xf:label>Green</xf:label> <xf:value>g</xf:value> </xf:item> </xf:choices> <xf:choices> <xf:label>Red colors</xf:label> <xf:item> <xf:label>Red</xf:label> <xf:value>r</xf:value> </xf:item> <xf:item> <xf:label>Magenta</xf:label> <xf:value>m</xf:value> </xf:item> </xf:choices> </xf:select>