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DtComboBox(3)
CDE
NAME
DtComboBox - the ComboBox widget class
SYNOPSIS
#include <Dt/ComboBox.h>
DESCRIPTION
The DtComboBox widget is a combination of a TextField and a List widget
that provides a list of valid choices for the TextField. Selecting an item
from this list automatically fills in the TextField with that list item.
Widget subclassing is not supported for the DtComboBox widget class.
The resources for the XmList and XmTextField widgets that are created by
the DtComboBox are accessible by using the XtNameToWidget(3Xt) function.
The names of these widgets are *List and Text, respectively. (The *List
notation is required because the List widget is not an immediate descendant
of the DtComboBox. See XtNameToWidget(3Xt).) in the X/Open CAE
Specification, X/Open Window Management: X Toolkit Intrinsics.)
Classes
The DtComboBox widget inherits behavior and resources from the Core,
Composite and XmManager classes.
The class pointer is dtComboBoxWidgetClass.
The class name is DtComboBoxWidget.
New Resources
The following table defines a set of widget resources used by the
application to specify data. The application can also set the resource
values for the inherited classes to set attributes for this widget. To
reference a resource by name or by class in a .Xdefaults file, the
application must remove the DtN or DtC prefix and use the remaining
letters. To specify one of the defined values for a resource in a
.Xdefaults file, the application must remove the Dt prefix and use the
remaining letters (in either lower case or upper case, but including any
underscores between words). The codes in the access column indicate if the
given resource can be set at creation time (C), set by using XtSetValues
(S), retrieved by using XtGetValues (G), or is not applicable (N/A).
_______________________________________________________________________________________
Name Class Type Default Access
_______________________________________________________________________________________
DtNmarginHeight DtCMarginHeight Dimension 2 CSG
DtNmarginWidth DtCMarginWidth Dimension 2 CSG
DtNselectedItem DtCSelectedItem XmString dynamic CSG
DtNselectedPosition DtCSelectedPosition int dynamic CSG
DtNselectionCallback DtCCallback XtCallbackList NULL C
DtNcomboBoxType DtCComboBoxType unsigned int DtDROP_DOWN_LIST C
DtNmarginHeight
Specifies the number of pixels added between the top and bottom of
the text widget and the start of the shadow.
DtNmarginWidth
Specifies the number of pixels added between the right and left sides
of the text widget and the start of the shadow.
DtNselectedItem
This resource is passed through to the XmList to set the
XmNselectedItemCount and XmNselectedItems as the single item in the
XmNitems that matches this specified XmString in the List. Setting
both DtNselectedItem and DtNselectedPosition in the same argument
list produces undefined behavior.
DtNselectedPosition
This resource is passed through to the XmList to set the
XmNselectedItemCount and XmNselectedItems as the single item at this
specified position in the List. Setting both DtNselectedItem and
DtNselectedPosition in the same argument list produces undefined
behavior.
DtNselectionCallback
This callback list is issued when an item is selected from the
DtComboBox widget's List. The call_data structure contains a
DtComboBoxCallbackStruct with the reason DtCR_SELECT.
DtNcomboBoxType
This resource determines the style of the DtComboBox. There are two
choices:
DtDROP_DOWN_COMBO_BOX
Provides an editable text area.
DtDROP_DOWN_LIST
Provides a static text area.
Inherited Resources
The DtComboBox widget inherits behavior and resources from the following
named superclasses. For a complete description of each resource, see the
man page for that superclass.
_____________________________________________________________________________________
Name Class Type Default Access
_____________________________________________________________________________________
XmNbottom- XmCBottom- Pixel dynamic CSG
ShadowColor ShadowColor
XmNbottom- XmCBottom- Pixmap XmUNSPECIFIED- CSG
ShadowPixmap ShadowPixmap _PIXMAP
XmNforeground XmCForeground Pixel dynamic CSG
XmNhelpCallback XmCCallback XtCallbackList NULL C
XmNhighlightColor XmCHighlightColor Pixel dynamic CSG
XmNhighlightPixmap XmCHighlightPixmap Pixmap dynamic CSG
XmNinitialFocus XmCInitialFocus Widget NULL CSG
XmNnavigationType XmCNavigationType XmNavigationType dynamic CSG
XmNshadowThickness XmCShadowThickness Dimension dynamic CSG
XmNstringDirection XmCStringDirection XmStringDirection dynamic CG
XmNtopShadowColor XmCTopShadowColor Pixel dynamic CSG
XmNtopShadowPixmap XmCTopShadowPixmap Pixmap dynamic CSG
XmNtraversalOn XmCTraversalOn Boolean dynamic CSG
XmNunitType XmCUnitType unsigned char dynamic CSG
XmNuserData XmCUserData XtPointer NULL CSG
________________________________________________________________________________
Name Class Type Default Access
________________________________________________________________________________
XmNchildren XmCReadOnly WidgetList NULL G
XmNinsertPosition XmCInsertPosition XtOrderProc default procedure CSG
XmNnumChildren XmCReadOnly Cardinal 0 G
_______________________________________________________________________________________________
Name Class Type Default Access
_______________________________________________________________________________________________
XmNaccelerators XmCAccelerators XtAccelerators dynamic CSG
XmNancestorSensitive XmCSensitive Boolean dynamic G
XmNbackground XmCBackground Pixel dynamic CSG
XmNbackgroundPixmap XmCPixmap Pixmap XmUNSPECIFIED- CSG
_PIXMAP
XmNborderColor XmCBorderColor Pixel XtDefaultForeground CSG
XmNborderPixmap XmCPixmap Pixmap XmUNSPECIFIED- CSG
_PIXMAP
XmNborderWidth XmCBorderWidth Dimension 0 CSG
XmNcolormap XmCColormap Colormap dynamic CG
XmNdepth XmCDepth int dynamic CG
XmNdestroyCallback XmCCallback XtCallbackList NULL C
XmNheight XmCHeight Dimension dynamic CSG
XmNinitial- XmCInitial- Boolean True C
ResourcesPersistent ResourcesPersistent
XmNmappedWhen- XmCMappedWhen- Boolean True CSG
Managed Managed
XmNscreen XmCScreen Screen * dynamic CG
XmNsensitive XmCSensitive Boolean True CSG
XmNtranslations XmCTranslations XtTranslations dynamic CSG
XmNwidth XmCWidth Dimension dynamic CSG
XmNx XmCPosition Position 0 CSG
XmNy XmCPosition Position 0 CSG
Callback Information
A pointer to the following structure is passed to each DtComboBox callback:
typedef struct {
int reason;
XEvent *event;
XmString item_or_text;
int item_position;
} DtComboBoxCallbackStruct;
The reason argument indicates why the callback was invoked; it is always
DtCR_SELECT.
The event argument points to the XEvent that triggered the callback, or
NULL if the callback was not triggered by an XEvent.
The item_or_text argument is the contents of the Text widget at the time
the event caused the callback to be invoked. This data is only valid
within the scope of the call_data structure, so the application must copy
it when it is used outside of this scope.
The item_position argument is the new value of the DtNselectedPosition
resource in the DtComboBox's List. If this is zero, it means the user
entered a value in the XmTextField widget.
SEE ALSO
DtComboBoxAddItem(3), DtComboBoxDeletePos(3), DtComboBoxSelectItem(3),
DtComboBoxSetItem(3), DtCreateComboBox(3), Composite(3X), Constraint(3X),
Core(3X), XmList(3X), XmManager(3X), XmText(3X), XmTextField(3X),
XtGetValues(3Xt), XtSetValues(3Xt).
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