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NAME
DtEditor - the DtEditor widget class
SYNOPSIS
#include <Dt/Editor.h>
DESCRIPTION
The DtEditor widget supports creating and editing text
files. It gives applications running in the desktop
environment a consistent method for editing text data. The
widget consists of:
o A scrolled edit window for text
o Dialogs for finding and changing text
o Optional status line
o Spell checking option
o Formatting options
o Convenience functions for programmatically controlling
the widget
The DtEditor widget supports the following set of basic
editing operations:
o Finding and changing text
o Simple formatting
o Spell checking
o Undoing the previous edit operation
All operations, except for spell checking, support locales
with single- and multi-byte characters.
The DtEditor widget also supports input and output of ASCII
text, multi-byte text and buffers of data. Data can be
passed between the application and the DtEditor widget, or a
file and the widget.
The DtEditor widget provides separate callback lists to
track when text is selected or deselected. In addition, it
extends the standard help callback to report help requests
from any of its components.
Widget subclassing is not supported for the DtEditor widget
class.
Edit Window
The edit window supports basic editing operations such as
cut and paste, find and change, simple formatting and spell
checking.
Mouse and Keyboard
The user can use the mouse to move the edit cursor and to
select portions of a document for editing operations.
Selection is based on the model specified in the Inter-
Client Communication Conventions Manual (ICCCM). The DtEdi-
tor widget supports primary and secondary selection.
The user can cut, copy and paste text using the clipboard,
primary transfer or secondary transfer. The DtEditor widget
accepts drops of text, text files or buffers of data. Text
drops are inserted where the mouse button is released to
complete the drop. Dropped files and buffers of data are
placed at the insertion cursor. The DtEditor widget sup-
ports dragging of text within the edit window or to a dif-
ferent widget.
The DtEditor widget provides a set of translations for the
edit window. The default translations provide key bindings
for moving the insertion cursor, and deleting, inserting and
selecting text. The insertion cursor, displayed as an I-
beam, shows where input is inserted. Input is inserted just
before the insertion cursor.
Status Line
The status line, which can be shown or hidden, displays the
current line number, total line count and whether the DtEdi-
tor widget is in overstrike mode. The current line-number
display shows the line number of the line containing the
insertion cursor. The user can go directly to any line in
the document by entering the number into the current line
number display. The status line also provides a text field
for displaying application-supplied messages. For informa-
tion on localizing the status line, see the Localization
Resources section.
Dialogs
The DtEditor widget includes dialogs to provide a graphical
user interface to its functionality:
o Find/Change dialog
o Spell dialog.
o Format Settings dialog
The titles of all dialogs are controlled with the DtNdi-
alogTitle resource. All dialogs are posted using
corresponding convenience functions and remain posted until
dismissed by the user. Each dialog includes Close and Help
buttons in addition to buttons described in the following
lists. For information on localizing these dialogs, see the
Localization Resources section.
The Find/Change dialog for the DtEditor widget enables users
to search for, and optionally replace, a string in the edit
window. The dialog includes fields for specifying the find
string and the replacement string. Buttons initiate the
find or change either the next occurrence or all occurrences
of the find string to the replacement string. When the user
selects the Find button, the next occurrence of the speci-
fied string (regular expressions are not supported) is
highlighted in the DtEditor widget, if found; otherwise, the
DtEditor widget displays a message dialog stating the string
was not found. If the string was found, the user has the
option to change the highlighted occurrence or all
occurrences.
The DtEditorFind(3) and DtEditorChange(3) functions provide
a programmatic interface to the find and change functional-
ity of the DtEditor widget.
The Spell dialog is used to check the contents of the edit
window for spelling errors. It consists of a list of
misspelled words, replacement string field and the same set
of buttons as the Find dialog. Choosing a word from the
list automatically selects it as the find string. Double-
clicking on a word searches for the next occurrence of that
word. The list of misspelled words is automatically gen-
erated using the filter specified by DtNspellFilter when the
dialog is displayed. The actions for find, change to and
change all are the same as the Find dialog.
The Format Settings dialog for the DtEditor widget enables
users to format the contents of the edit window, format just
the paragraph containing the insertion cursor, or specify
the arguments used when formatting text. The arguments
include margin settings and text alignment. The user has
the choice of aligning the text flush with the left or right
margin, centering each line of text between the margins, or
aligning it flush with both margins. The user enter the
left and right margin values into text fields and choose an
alignment option from a set of toggle buttons. Two push
buttons allow them to format the current paragraph or format
the complete document.
The margin values used for formatting do not have to be the
same as the width of the edit window. It is possible to
format the text with margin values that are narrower or
wider than the displayed edit window. By default, values
for the format margins are the current size of the edit win-
dow. If text is formatted wider than the edit window and
the DtNwordWrap resource is True, text wraps at the right
edge of the edit window (see the description for
DtNwordWrap), regardless of the right margin setting. To
format text wider than the edit window, DtNwordWrap should
be False.
The DtEditorFormat(3) function provides a programmatic
interface to the format functionality of the DtEditor
widget.
Word Wrap and Formatting
Word wrap and text formatting are essentially independent
operations. Word wrap pertains to the dynamic display of
lines, as delimited by <newline> characters, which exceed
the width of the Text Editor window and is based on the left
and right window boundaries. When word wrap mode is off
(the default), each line of text is displayed on a single
line on the display and text entered at the right window
boundary causes the window to scroll automatically to the
right to accommodate the new text until an actual <newline>
character is entered (normally, by pressing the Return key).
When word wrap mode is on, lines longer than the window
width are automatically wrapped at the right window margin
to one or more display lines, and text entered at the right
window boundary is automatically broken on a word boundary
to the first column of the next display line. Word wrap is
dynamic in that word-wrapped lines are automatically
adjusted when text is inserted or deleted or when the window
is resized. Word wrap only affects the display of lines; it
does not actually insert <newline> characters in the text.
Text formatting is a static operation that inserts actual
<newline> (and/or <space>) characters directly in the text
to match it to the left and right margins (and justification
mode) specified in the Format Settings dialog. Format set-
tings affect text only when explicitly applied and have no
affect on word wrap or previously formatted text. Ini-
tially, and whenever the window is resized, the right format
margin is automatically set to the window width to match the
word wrap boundary.
Classes
The DtEditor widget inherits behavior and resources from
Core, Composite, Constraint, XmManager, XmBulletinBoard and
XmForm classes.
The class pointer is dtEditorWidgetClass.
The class name is DtEditorWidget.
New Resources
The following table defines a set of widget resources the
application uses 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 appli-
cable (N/A).
DtEditor Resource Set
Name Class Type Default Access
DtNautoShowCursorPosition DtCAutoShowCursorPosition Boolean True CSG
DtNblinkRate DtCBlinkRate int 500 CSG
DtNbuttonFontList DtCFontList XmFontList dynamic CSG
DtNcolumns DtCColumns XmNcolumns dynamic CSG
DtNcursorPosition DtCCursorPosition XmTextPosition 0 CSG
DtNcursorPositionVisible DtCCursorPositionVisible Boolean True CSG
DtNdialogTitle DtCDialogTitle XmString NULL CSG
DtNeditable DtCEditable Boolean True CSG
DtNlabelFontList DtCFontList XmFontList dynamic CSG
DtNmaxLength DtCMaxLength int largest integer CSG
DtNoverstrike DtCOverstrike Boolean False CSG
DtNrows DtCRows XmNrows dynamic CSG
DtNscrollHorizontal DtCScroll Boolean True CG
DtNscrollLeftSide DtCScrollSide Boolean dynamic CG
DtNscrollTopSide DtCScrollSide Boolean False CG
DtNscrollVertical DtCScroll Boolean True CG
DtNshowStatusLine DtCShowStatusLine Boolean False CSG
DtNspellFilter DtCspellFilter char * spell CSG
DtNtextBackground DtCBackground Pixel dynamic CSG
DtNtextDeselectCallback DtCCallback XtCallbackList NULL C
DtNtextFontList DtCFontList XmFontList dynamic CSG
DtNtextForeground DtCForeground Pixel dynamic CSG
DtNtextSelectCallback DtCCallback XtCallbackList NULL C
DtNtextTranslations DtCTranslations XtTranslations NULL CS
DtNtopCharacter DtCTextPosition XmTextPosition 0 CSG
DtNwordWrap DtCWordWrap Boolean False CSG
SDtNenableUrlAwareness SDtCenableUrlAwareness Boolean True CG
DtNautoShowCursorPosition
Ensures that the text visible in the scrolled edit
window contains the insert cursor when set to True.
If the insert cursor changes, the contents of the
DtEditor widget may scroll in order to bring the
insertion point into the window.
DtNblinkRate
Specifies the blink rate of the text cursor in mil-
liseconds. The time indicated in the blink rate
relates to the time the cursor is visible and the
time the cursor is invisible (that is, the time it
takes to blink the insertion cursor on and off is
twice the blink rate). The cursor does not blink
when the blink rate is set to zero. The value can-
not be negative.
DtNbuttonFontList
Specifies the font list used for the DtEditor but-
tons (the buttons appearing in the DtEditor dia-
logs). If this value is NULL at initialization, it
is initialized by looking up the parent hierarchy
of the widget for an ancestor that is a subclass of
the XmBulletinBoard, VendorShell or XmMenuShell
widget class. If such an ancestor is found, the
font list is initialized to the appropriate default
font list of the ancestor widget (XmNdefault-
FontList for VendorShell and XmMenuShell, and
XmNbuttonFontList for XmBulletinBoard). If no such
ancestor is found, the default is implementation
dependent. Refer to XmFontList(3X) for more infor-
mation on the creation and structure of a font
list.
DtNcolumns
Specifies the initial width of the edit window of
the DtEditor widget as an integral number of char-
acters. The width equals the number of characters
this resource specifies multiplied by the maximum
character width of the associated font. For pro-
portionate fonts, the actual number of characters
that fit on a given line may be greater than the
value specified. The value must be greater than
zero. The default value depends on the value of
the DtNwidth resource.
DtNcursorPosition
Indicates the position in the DtEditor widget where
the current insert cursor is located. This posi-
tion is determined by the number of characters from
the beginning of the text. The first character
position is zero.
DtNcursorPositionVisible
When set to True, this resource specifies that the
insert cursor position is marked by a blinking text
cursor.
DtNdialogTitle
Specifies an XmString that appears as part of the
titles for the dialogs displayed by the DtEditor
widget. If this resource is non-NULL, it is used
as the prefix of the titles for the Find/Change,
Spell and Format Settings dialogs.
DtNeditable
When set to True, this resource indicates that the
user can edit the text; otherwise, it prohibits the
user from editing the text.
DtNlabelFontList
Specifies the font list used for the labels for
DtEditor (the labels appear in the status line and
the DtEditor dialogs). If this value is NULL at
initialization, it is initialized by looking up the
parent hierarchy of the widget for an ancestor that
is a subclass of the XmBulletinBoard, VendorShell
or XmMenuShell widget class. If such an ancestor
is found, the font list is initialized to the
XmNlabelFontList of the ancestor widget. If no
such ancestor is found, the default is implementa-
tion dependent. Refer to XmFontList(3X) for more
information on the creation and structure of a font
list.
DtNmaxLength
Specifies the maximum length of the text string
that can be entered into the DtEditor widget from
the keyboard. This value must be non-negative.
Strings entered using the DtEditorSetContents(3) or
DtEditorSetContentsFromFile(3) functions ignore
this resource.
DtNoverstrike
When set to False, characters typed into the DtEdi-
tor widget are inserted at the position of the
insertion cursor. This is the default behavior.
If set to True, characters typed into the DtEditor
widget replace the characters that directly follow
the insertion cursor. When the end of the line is
reached, characters are appended to the end of the
line. If the status line is visible, DtNover-
strikeIndicatorLabel appears in the status line
whenever DtNoverstrike is True.
DtNrows
Specifies the initial height of the edit window of
the DtEditor widget measured in character heights.
The value must be greater than zero.
DtNscrollHorizontal
When set to True, this resource adds a ScrollBar
that allows the user to scroll horizontally through
text.
DtNscrollLeftSide
When set to True, this resource indicates that the
vertical ScrollBar should be placed on the left
side of the scrolled edit window. This attribute
is ignored if DtNscrollVertical is False. The
default value may depend on the value of the
XmNstringDirection resource.
DtNscrollTopSide
When set to True, this resource indicates that the
horizontal ScrollBar should be placed on the top
side of the scrolled edit window. This attribute
is ignored if DtNscrollHorizontal is False.
DtNscrollVertical
When set to True, this resource adds a ScrollBar
that allows the user to scroll vertically through
text.
DtNshowStatusLine
When set to True, the DtEditor widget displays a
status line below the edit window. The status line
contains a field that displays the current line
number of the insert cursor, total number of lines
in the document, and whether the DtEditor widget is
in overstrike mode. The user can enter a line
number in the line number display to go directly to
that line.
The status line also includes a Motif Text Field
widget (XmTextField) for displaying application
supplied messages. This field is a convenient way
for an application to display status and feedback
about the document being edited. The Text Field ID
is retrieved using DtEditorGetMessageTextFiel-
dID(3). A message is displayed by setting the
XmNvalue or XmNvalueWcs resource of this widget.
If the Text field is not needed, it can be
unmanaged by calling XtUnmanageWidget(3X) with its
ID.
DtNspellFilter
Specifies the filter used to identify spelling
errors. The DtEditorInvokeSpellDialog(3) function
filters the contents of a DtEditor widget through
the filter specified by DtNspellFilter. The filter
specified should accept a file name and produce a
list of misspelled and unrecognized words in this
file on standard out. The default filter is
spell(1).
DtNtextBackground
Specifies the background of the edit window and the
text fields for DtEditor (the text fields appear in
the status line and DtEditor dialogs).
DtNtextDeselectCallback
Specifies a function called whenever the selection
becomes NULL (that is, no text is selected within
the edit area). The reason sent by the callback is
DtEDITOR_TEXT_DESELECT.
DtNtextFontList
Specifies the font list used for the edit window
and the text fields for DtEditor (the text fields
appear in the status line and DtEditor dialogs).
If this value is NULL at initialization, it is ini-
tialized by looking up the parent hierarchy of the
widget for an ancestor that is a subclass of the
XmBulletinBoard or VendorShell widget class. If
such an ancestor is found, the font list is ini-
tialized to the XmNtextFontList of the ancestor
widget. If no such ancestor is found, the default
is implementation dependent. Refer to
XmFontList(3X) for more information on the creation
and structure of a font list.
DtNtextForeground
Specifies the foreground of the edit window and the
text fields for DtEditor (the text fields appear in
the status line and DtEditor dialogs).
DtNtextSelectCallback
Specifies a function called whenever the selection
becomes non-NULL (that is, some text is selected
within the edit area). The reason sent by the
callback is DtEDITOR_TEXT_SELECT.
DtNtextTranslations
Adds translations to the edit window. Translations
specified with DtNtextTranslations override any
duplicate translations defined for the edit window.
DtNtopCharacter
Displays the line that contains the position of
text at the top of the scrolled edit window. The
line is displayed at the top of the DtEditor widget
without shifting the text left or right. The posi-
tion is determined by the number of characters from
the beginning of the text. The first character
position is zero.
XtGetValues(3X) for DtNtopCharacter returns the
position of the first character in the line that is
displayed at the top of the DtEditor widget.
DtNwordWrap
Indicates that text not go off the right edge of
the window, but that lines are broken at word
breaks with soft line feeds when they reach the
right edge of the window.
Word wrap affects only the visual appearance of the
contents of a DtEditor widget. The line breaks
(soft line feeds) are not physically inserted into
the text. The DtEditor widget supports substitut-
ing <newline>s when the contents of the widget are
retrieved or saved to a file (see DtEditorGetCon-
tents(3) and DtEditorSaveContentsToFile(3)).
SDtNenableUrlAwareness
Specifies whether read-only DtEditor widgets will highlight
URLs, thereby allowing users to click on the URL and view
the web page.
Localization Resources
The following table defines a set of widget resources
designed for localization of the DtEditor widget and its
dialogs. Default values for these resources depends on the
locale.
DtEditor Localization Resource Set
_________________________________________________________________________________
Name Class Type Default Access
_________________________________________________________________________________
DtNcenterToggleLabel DtCCenterToggleLabel XmString Dynamic CSG
DtNchangeAllButtonLabel DtCChangeAllButtonLabel XmString Dynamic CSG
DtNchangeButtonLabel DtCChangeButtonLabel XmString Dynamic CSG
DtNchangeFieldLabel DtCChangeFieldLabel XmString Dynamic CSG
DtNcurrentLineLabel DtCCurrentLineLabel XmString Dynamic CSG
DtNfindButtonLabel DtCFindButtonLabel XmString Dynamic CSG
DtNfindChangeDialogTitle DtCFindChangeDialogTitle XmString Dynamic CSG
DtNfindFieldLabel DtCFindFieldLabel XmString Dynamic CSG
DtNformatAllButtonLabel DtCFormatAllButtonLabel XmString Dynamic CSG
DtNformatParagraphButton- DtCFormatParagraphButton- XmString Dynamic CSG
Label Label
DtNformatSettingsDialogTitle DtCFormatSettingsDialogTitle XmString Dynamic CSG
DtNinformationDialogTitle DtCInformationDialogTitle XmString Dynamic CSG
DtNjustifyToggleLabel DtCJustifyToggleLabel XmString Dynamic CSG
DtNleftAlignToggleLabel DtCLeftAlignToggleLabel XmString Dynamic CSG
DtNleftMarginFieldLabel DtCLeftMarginFieldLabel XmString Dynamic CSG
DtNmisspelledListLabel DtCMisspelledListLabel XmString Dynamic CSG
DtNoverstrikeLabel DtCOverstrikeLabel XmString Dynamic CSG
DtNrightAlignToggleLabel DtCRightAlignToggleLabel XmString Dynamic CSG
DtNrightMarginFieldLabel DtCRightMarginFieldLabel XmString Dynamic CSG
DtNspellDialogTitle DtCSpellDialogTitle XmString Dynamic CSG
DtNtotalLineCountLabel DtCTotalLineCountLabel XmString Dynamic CSG
DtNcenterToggleLabel
Specifies the label for the center alignment toggle
button in the Format Settings dialog. The default
value in the C locale is Center.
DtNchangeAllButtonLabel
Specifies the label for the button in the
Find/Change and Spell dialogs that change all
occurrences of the Find string in the document.
The default value in the C locale is Change All.
DtNchangeButtonLabel
Specifies the label for the button in the
Find/Change and Spell dialogs that change the next
occurrence of the Find string in the document. The
default value in the C locale is Change.
DtNchangeFieldLabel
Specifies the label for the field in the
Find/Change dialog where the user specifies the
replacement string. The default value in the C
locale is Change To:.
DtNcurrentLineLabel
Specifies the label for the current line number
field in the status line. The default value in the
C locale is Line:.
DtNfindButtonLabel
Specifies the label for the button in the
Find/Change dialog that finds the next occurrence
of the Find string in the document. The default
value in the C locale is Find.
DtNfindChangeDialogTitle
Specifies the title for the Find/Change dialog. If
DtNdialogTitle is non-NULL, it is added as a prefix
to this resource to form the title. The default
value in the C locale is Find/Change.
DtNfindFieldLabel
Specifies the label for the field in the
Find/Change dialog where the user specifies the
search string. The default value in the C locale
is Find:.
DtNformatAllButtonLabel
Specifies the label for the button in the Format
Settings dialog that formats the complete document.
The default value in the C locale is All.
DtNformatParagraphButtonLabel
Specifies the label for the button in the Format
Settings dialog that formats the paragraph contain-
ing the insertion cursor. The default value in the
C locale is Paragraph.
DtNformatSettingsDialogTitle
Specifies the title for the Format Settings dialog.
If DtNdialogTitle is non-NULL, it is added as a
prefix to this resource to form the title. The
default value in the C locale is Format Settings.
DtNinformationDialogTitle
Specifies the title for the Information dialog used
to present feedback and general information to the
user. If DtNdialogTitle is non-NULL, it is added
as a prefix to this resource to form the title.
The default value in the C locale is Information.
DtNjustifyToggleLabel
Specifies the label for the justify alignment tog-
gle button in the Format Settings dialog. The
default value in the C locale is Justify.
DtNleftAlignToggleLabel
Specifies the label for the left alignment toggle
button in the Format Settings dialog. The default
value in the C locale is Left Align.
DtNleftMarginFieldLabel
Specifies the label for the left margin value field
in the Format Settings dialog. The default value
in the C locale is Left Margin:.
DtNmisspelledListLabel
Specifies the label for the list of unrecognized
and misspelled words in the Spell dialog. The
default value in the C locale is Misspelled Words:.
DtNoverstrikeLabel
Specifies the label in the status line that indi-
cates that the DtEditor widget is in overstrike
mode. The default value in the C locale is Over-
strike.
DtNrightAlignToggleLabel
Specifies the label for the right alignment toggle
button in the Format Settings dialog. The default
value in the C locale is Right Align.
DtNrightMarginFieldLabel
Specifies the label for the right margin value
field in the Format Settings dialog. The default
value in the C locale is Right Margin:.
DtNspellDialogTitle
Specifies the title for the Spell dialog. If
DtNdialogTitle is non-NULL, it is added as a prefix
to this resource to form the title. The default
value in the C locale is Spell.
DtNtotalLineCountLabel
Specifies the label for the display showing the
total number of lines in the document. The total
number of lines displayed is part of the status
line. The default value in the C locale is Total:.
Inherited Resources
The DtEditor widget inherits behavior and resources from the
following named superclasses. For a complete description of
each resource, see the man page for that superclass.
XmForm Resource Set
Name Class Type Default Access
XmNfractionBase XmCMaxValue int 100 CSG
XmNhorizontalSpacing XmCSpacing Dimension 0 CSG
XmNrubberPositioning XmCRubberPositioning Boolean False CSG
XmNverticalSpacing XmCSpacing Dimension 0 CSG
XmForm Resource Set
Name Class Type Default Access
XmNallowOverlap XmCAllowOverlap Boolean True CSG
XmNautoUnmanage XmCAutoUnmanage Boolean True CG
XmNbuttonFontList XmCButtonFontList XmFontList dynamic CSG
XmNcancelButton XmCWidget Window NULL SG
XmNdefaultButton XmCWidget Window SG
XmNdefaultPosition XmCDefaultPosition Boolean True CSG
XmNdialogStyle XmCDialogStyle unsigned char dynamic CSG
XmNdialogTitle XmCDialogTitle XmString NULL CSG
XmNfocusCallback XmCCallback XtCallbackList NULL C
XmNlabelFontList XmCLabelFontListk XmFontList dynamic CSG
XmNmapCallback XmCCallback XtCallbackList NULL C
XmNmarginHeight XmCMarginHeight Dimension 10 CSG
XmNmarginWidth XmCMarginWidth Dimension 10 CSG
XmNnoResize XmCNoResize Boolean False CSG
XmNresizePolicy XmCResizePolicy unsigned char XmRESIZE_ANY CSG
XmNshadowType XmCShadowType unsigned char XmSHADOW_OUT CSG
XmNtextFontList XmCTextFontList XmFontList dynamic CSG
XmNtextTranslations XmCTranslations XtTranslations NULL C
XmNunmapCallback XmCCallback XtCallbackList NULL C
XmManager Resource Set
______________________________________________________________________________
Name Class Type Default Access
______________________________________________________________________________
XmNbottomShadowColor XmCBottomShadowColor Pixel dynamic CSG
XmNbottomShadow- XmCBottomShadow- Pixmap XmUNSPECIFIED- CSG
Pixmap Pixmap _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 XmNavigation- dynamic CSG
Type
XmNshadowThickness XmCShadowThickness Dimension dynamic CSG
XmNstringDirection XmCStringDirection XmString- dynamic CG
Dynamic
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
Composite Resource Set
________________________________________________________________________
Name Class Type Default Access
________________________________________________________________________
XmNchildren XmCReadOnly WidgetList NULL G
XmNinsertPosition XmCInsertPosition XtOrderProc default procedure CSG
XmNnumChildren XmCReadOnly Cardinal 0 G
Core Resource Set
_______________________________________________________________________________________
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
The DtEditor widget has three callback functions of
interest:
DtNtextSelectCallback and DtNtextDeselectCallback
The DtNtextSelectCallback and DtNtextDeselectCall-
back resources allow an application to enable and
disable certain commands or menu items based on
whether there is a selection. DtNtextSelectCall-
back specifies a function called whenever the
selection becomes non-NULL (that is, some text is
selected within the edit window), while
DtNtextDeselectCallback specifies a function called
whenever the selection becomes NULL (that is, no
text is selected within the edit window). The rea-
sons sent by the callbacks are DtEDITOR_TEXT_SELECT
and DtEDITOR_TEXT_DESELECT.
XmNhelpCallback
An application that wishes to present help informa-
tion to the user on the DtEditor widget and its
dialogs should set the XmNhelpCallback resource and
use the Reason field passed as part of DtEdi-
torHelpCallbackStruct to set the contents of its
Help dialog. A pointer to the following structure
is passed to the XmNHelpCallback callback.
typedef struct {
int reason,
XEvent *event
} XmAnyCallbackStruct;
reason
Indicates why the callback was invoked. The possi-
ble reasons are:
DtEDITOR_HELP_EDIT_WINDOW
The help request originated in the edit
window.
DtEDITOR_HELP_STATUS_LINE
The help request originated in the status
line.
DtEDITOR_HELP_STATUS_CURRENT_LINE
The help request originated in the Current
Line number display in the status line.
DtEDITOR_HELP_STATUS_TOTAL_LINES
The help request originated in the Total
Lines display in the status line.
DtEDITOR_HELP_STATUS_MESSAGE
The help request originated in the Message
field in the status line.
DtEDITOR_HELP_STATUS_OVERSTRIKE
The help request originated in the Over-
strike Indicator in the status line.
DtEDITOR_HELP_FORMAT_DIALOG
The help request originated in the Help
button in the Format dialog.
DtEDITOR_HELP_FORMAT_LEFT_MARGIN
The help request originated in the Left
Margin field in the Format dialog.
DtEDITOR_HELP_FORMAT_RIGHT_MARGIN
The help request originated in the Right
Margin field in the Format dialog.
DtEDITOR_HELP_FORMAT_ALIGNMENT
The help request originated in the Align-
ment buttons in the Format dialog.
DtEDITOR_HELP_CHANGE_DIALOG
The help request originated in the Help
button in the Find/Change dialog.
DtEDITOR_HELP_CHANGE_FIND
The help request originated in the Find
field in the Find/Change dialog.
DtEDITOR_HELP_CHANGE_CHANGE
The help request originated in the Change
To field in the Find/Change dialog.
DtEDITOR_HELP_SPELL_DIALOG
The help request originated in the help
button in the Spell dialog.
DtEDITOR_HELP_SPELL_MISSPELLED_WORDS
The help request originated in the List of
Misspelled Words in the Spell dialog.
DtEDITOR_HELP_SPELL_CHANGE
The help request originated in the Change
To field in the Spell dialog.
event
A pointer to the XEvent that caused this callback
to be invoked. It may be NULL.
Translations
The DtEditor widget translations for the edit window are
described in the following list. The DtNtextTranslations
resource can be used to modify these translations.
KLeft
backward-character()
MShift KLeft
key-select (left)
MCtrl KLeft
backward-word()
MShift MCtrl KLeft
backward-word (extend)
KRight
forward-character()
MShift KRight
key-select (right)
MCtrl KRight
forward-word()
MShift MCtrl KRight
forward-word (extend)
KUp
process-up()
MShift KUp
process-shift-up()
MCtrl KUp
backward-paragraph()
MShift MCtrl KUp
backward-paragraph (extend)
KDown
process-down()
MShift KDown
process-shift-down()
MCtrl KDown
forward-paragraph()
MShift MCtrl KDown
forward-paragraph (extend)
KBeginLine
beginning-of-line()
MShift KBeginLine
beginning-of-line (extend)
KEndLine
end-of-line()
MShift KEndLine
end-of-line (extend)
KPageUp
previous-page()
MShift KPageUp
previous-page (extend)
KPageLeft
page-left()
KPageDown
next-page()
MShift KPageDown
next-page (extend)
KPageRight
page-right()
KBeginData
beginning-of-file()
MShift KBeginData
beginning-of-file (extend)
KEndData
end-of-file()
MShift KEndData
end-of-file (extend)
KDelete
delete-next-character()
MCtrl KDelete
delete-to-end-of-line()
KBackSpace
delete-previous-character()
MCtrl KBackSpace
delete-previous-word()
MShift KBackSpace
delete-to-start-of-line()
MAlt KBackSpace
undo-edit()
MCtrl Kz
undo-edit()
MCtrl K/
select-all()
MCtrl K\
deselect-all()
MCtrl Kg
go-to-line()
MCtrl Kq
quote-next-character()
MCtrl Kx
cut-clipboard()
MCtrl Kc
copy-clipboard()
MCtrl Kv
paste-clipboard()
KHelp
Help()
KInsert
toggle-insert-mode()
KEnter
new-line-and-indent()
MAnyKCancel
process-cancel()
Action Routines
The DtEditor widget action routines are described here:
backward-character()
This action moves the insertion cursor one charac-
ter to the left. This action may have different
behavior in a right-to-left language environment.
backward-field()
This action searches backward in the text and
selects text between the delimeters |> and <|.
backward-paragraph(extend)
If this action is called with no argument, it moves
the insertion cursor to the first non-whitespace
character following the first previous blank line
or beginning of the text. If the insertion cursor
is already at the beginning of a paragraph, the
action moves the insertion cursor to the beginning
of the previous paragraph.
If this action is called with an argument of
extend, it moves the insertion cursor, as in the
case of no argument, and extends the current selec-
tion.
backward-word(extend)
If this action is called with no argument, it moves
the insertion cursor to the first non-whitespace
character after the first whitespace character to
the left or after the beginning of the line. If
the insertion cursor is already at the beginning of
a word, this action moves the insertion cursor to
the beginning of the previous word. This action
may have different behavior in a locale other than
the C locale.
If this action is called with an argument of
extend, it moves the insertion cursor, as in the
case of no argument, and extends the current selec-
tion.
beginning-of-file(extend)
If this action is called with no argument, it moves
the insertion cursor to the beginning of the text.
If this action is called with an argument of
extend, it moves the insertion cursor, as in the
case of no argument, and extends the current selec-
tion.
beginning-of-line(extend)
If this action is called with no argument, it moves
the insertion cursor to the beginning of the line.
If this action is called with an argument of
extend, it moves the insertion cursor, as in the
case of no argument, and extends the current selec-
tion.
clear-selection()
This action clears the current selection by replac-
ing each character except <carriage-return> with a
<space> character.
copy-clipboard()
This action copies the current selection to the
clipboard.
cut-clipboard()
This action cuts the current selection to the clip-
board.
delete-next-character()
If there is a non-NULL selection, this action
deletes the selection; otherwise, it deletes the
character following the insertion cursor.
delete-next-word()
If there is a non-NULL selection, this action
deletes the selection; otherwise, it deletes the
characters following the insertion cursor to the
next space, tab or end of line character.
delete-previous-character()
If there is a non-NULL selection, this action
deletes the selection; otherwise, it deletes the
character of text immediately preceding the inser-
tion cursor.
delete-previous-word()
If there is a non-NULL selection, this action
deletes the selection; otherwise, it deletes the
characters preceding the insertion cursor to the
next space, tab or beginning of the line character.
This action may have different behavior in a locale
other than the C locale.
delete-to-end-of-line()
If there is a non-NULL selection, this action
deletes the selection; otherwise, it deletes the
characters following the insertion cursor to the
next end-of-line character.
delete-to-start-of-line()
If there is a non-NULL selection, this action
deletes the selection; otherwise, it deletes the
characters preceding the insertion cursor to the
previous beginning-of-line character.
deselect-all()
This action deselects the current selection.
end-of-file(extend)
If this action is called with no argument, it moves
the insertion cursor to the end of the text.
If this action is called with an argument of
extend, it moves the insertion cursor, as in the
case of no argument, and extends the current selec-
tion.
end-of-line(extend)
If this action is called with no argument, it moves
the insertion cursor to the end of the line.
If this action is called with an argument of
extend, it moves the insertion cursor, as in the
case of no argument, and extends the current selec-
tion.
filter()
An argument must be passed. This argument is the
name of the program through which you wish to
filter the text. This action puts the selected text
into a temporary file, runs the specified filter
program on the temporary file, and, when the pro-
gram has completed, replaces the selected text with
the contents of the temporary file.
find-selection()
This action searches for the next occurrence of a
selected string. If the argument "forward" is
passed or if no argment is passed, the direction of
the search will be forward. If the argument "back-
ward" is passed, the direction of the search is
backwards.
find-string()
This action invokes a Find/Change dialog box.
forward-character()
This action moves the insertion cursor one charac-
ter to the right. This action may have different
behavior in a right-to-left language environment.
forward-field()
This action has the effect of searching forward in
the text and selecting text between the delimeters
|> and <|.
forward-paragraph(extend)
If this action is called with no argument, it moves
the insertion cursor to the first non-whitespace
character following the next blank line. If the
insertion cursor is already at the beginning of a
paragraph, this action moves the insertion cursor
to the beginning of the next paragraph.
If this action is called with an argument of
extend, it moves the insertion cursor, as in the
case of no argument, and extends the current selec-
tion.
forward-word(extend)
If this action is called with no argument, it moves
the insertion cursor to the first whitespace char-
acter or end-of-line following the next non-
whitespace character. If the insertion cursor is
already at the end of a word, this action moves the
insertion cursor to the end of the next word. This
action may have different behavior in a locale
other than the C locale.
If called with an argument of extend, this action
moves the insertion cursor, as in the case of no
argument, and extends the current selection.
go-to-line()
This action moves the keyboard focus to the Current
Line text field to allow the user to move the
insertion cursor to a new line. This action is
only valid if DtNshowStatusLine has a value of
True. For a description of the status line, see
the Editor Status Line heading in this manual page.
Help()
This action calls the callbacks for XmNhelpCallback
if any exist. If there are no help callbacks for
this widget, this action calls the help callbacks
for the nearest ancestor that has them.
insert-file()
This action insers a file at the current cursor
position. If an argument is passed, this argument
is used as the name for the new file. If no argu-
ment is passed then the current line is used as the
name of the new file.
insert-string(string)
This action deletes the entire selection if there
is a non-NULL selection and the cursor is not dis-
joint from it. It inserts string before the inser-
tion cursor.
key-select(direction)
If this action is called with an argument of right,
it moves the insertion cursor one character to the
right and extends the current selection. If this
action is called with an argument of left, it moves
the insertion cursor one character to the left and
extends the current selection. If this action is
called with no argument, it extends the current
selection.
newline-and-backup()
If there is a non-NULL selection and the cursor is
not disjoint from it, this action deletes the
entire selection, inserts a newline just before the
insertion cursor and repositions the insertion cur-
sor to the end of the line before the newline.
newline-and-indent()
If there is a non-NULL selection and the cursor is
not disjoint from it, this action deletes the
entire selection, inserts a newline and then the
same number of whitespace characters as at the
beginning of the previous line.
next-page(extend)
If this action is called with no argument, it moves
the insertion cursor forward one page.
If this action is called with an argument of
extend, it moves the insertion cursor, as in the
case of no argument, and extends the current selec-
tion.
page-left()
This action scrolls the viewing window left one
page of text.
page-right()
This action scrolls the viewing window right one
page of text.
paste-clipboard()
This action pastes the contents of the clipboard
before the insertion cursor.
popup-menu()
This action is invoked by pressing mouse button M3.
A pop-up menu is displayed containing the menu
options File, Edit, Format, Options, and Extras.
(The contents of these menus are not listed here.
To examine the contents of these menus, click mouse
button M3 on the desktop.)
previous-page(extend)
If this action is called with no argument, it moves
the insertion cursor back one page.
If this action is called with an argument of
extend, it moves the insertion cursor, as in the
case of no argument, and extends the current selec-
tion.
process-cancel()
This action cancels the current extend-adjust() or
secondary-adjust() operation and leaves the selec-
tion state as it was before the operation; other-
wise, (and if the parent is a manager) it passes
the event to the parent.
process-down()
This action moves the insertion cursor down one
line.
process-shift-down()
This action moves the insertion cursor down one
line, extending the current selection.
process-shift-up()
This action moves the insertion cursor up one line,
extending the current selection.
process-up()
This action moves the insertion cursor up one line.
select-all()
Selects all text.
toggle-insert-mode()
This action toggles the state of the text insertion
mode. By default, characters typed into the DtEdi-
tor widget are inserted at the position of the
insertion cursor. In overstrike mode, characters
entered into the DtEditor widget replace the char-
acters that directly follow the insertion cursor.
In overstrike mode, characters are appended to the
end of the line when the end of a line is reached.
quote-next-character()
This action treats the next typed character as a
special character and inserts it into the text
without interpreting it. Enables the insertion of
special instructional characters or special
language characters, such as the character marking
a form feed or the umlaut used in German text.
undo-edit()
This action undoes the last change (deletion or
insertion) made to the text. A change consists of
either a set of consecutive insertions, or a set of
consecutive deletions followed by up to one set of
consecutive insertions. An insertion is consecu-
tive if there have been no intervening deletions,
and it is continuing forward from the same point.
A deletion is consecutive if there have been no
intervening insertions, and its start or end posi-
tion is coincidental with the last deletion (that
is, the deletion is continuing from the same point,
either forward or backward). Undoing an edit once
restores the original text. Undoing an edit twice
restores the last change.
Convenience Functions
The Widget Library contains a number of functions that apply
to the DtEditor widget. The following lists summarize these
functions.
DtEditor Life Cycle Functions
DtCreateEditor()
Creates a new instance of a DtEditor widget.
DtEditorReset()
Restores a DtEditor widget to its initial state.
DtEditor Input/Output Functions
DtEditorAppend()
Appends content data to the end of a DtEditor
widget.
DtEditorAppendFromFile()
Appends the contents of a file to the end of a
DtEditor widget.
DtEditorGetContents()
Retrieves the entire contents of a DtEditor widget.
DtEditorInsert()
Inserts content data at the current insert
position.
DtEditorInsertFromFile()
Inserts the contents of a file at the current
insert position.
DtEditorReplace()
Replaces a portion of text with the supplied data.
DtEditorReplaceFromFile()
Replaces a portion of text with the contents of a
file.
DtEditorSaveContentsToFile()
Saves the entire contents to a file.
DtEditorSetContents()
Loads content data into a DtEditor widget, replac-
ing the entire contents of the widget.
DtEditorSetContentsFromFile()
Loads the contents of a file into a DtEditor
widget, replacing the entire contents of the
widget.
DtEditor Selection Functions
DtEditorClearSelection()
Replaces the currently selected contents with
blanks.
DtEditorCopyToClipboard()
Copies the currently selected contents to the clip-
board.
DtEditorCutToClipboard()
Removes the currently selected contents, placing it
on the clipboard.
DtEditorDeleteSelection()
Removes the currently selected contents.
DtEditorDeselect()
Deselects any selected contents.
DtEditorPasteFromClipboard()
Pastes the contents of the clipboard into a DtEdi-
tor widget, replacing any currently selected con-
tents.
DtEditorSelectAll()
Selects the entire contents of a DtEditor widget.
DtEditor Format Functions
DtEditorFormat()
Formats the contents of all or part of a DtEditor
widget.
DtEditorInvokeFormatDialog()
Displays the format dialog that enables the user to
specify format settings for margins and justifica-
tion style and to perform formatting operations.
DtEditor Find and Change Text Functions
DtEditorChange()
Changes one or all occurrences of a string.
DtEditorFind()
Finds the next occurrence of a string.
DtEditorInvokeFindChangeDialog()
Displays the dialog that enables the user to search
for, and optionally change, a string.
DtEditorInvokeSpellDialog()
Displays a dialog with a list of misspelled words
in the current contents.
DtEditor Auxiliary Functions
DtEditorDisableRedisplay()
Temporarily prevents visual update of a DtEditor
widget.
DtEditorEnableRedisplay()
Forces the visual update of a DtEditor widget.
DtEditorCheckForUnsavedChanges()
Reports whether the contents of a DtEditor widget
have been altered since they were last retrieved or
saved.
DtEditorGetInsertionPosition()
Returns the insertion cursor position of a DtEditor
widget.
DtEditorGetLastPosition()
Returns the position of the last character in the
edit window.
DtEditorGetMessageTextFieldID()
Retrieves the widget ID of the Text Field widget
used to display application messages.
DtEditorGetSizeHints()
Retrieves sizing information from a DtEditor
widget.
DtEditorGoToLine()
Moves the insert cursor to the specified line.
DtEditorSetInsertionPosition()
Sets the position of the insertion cursor.
DtEditorTraverseToEditor()
Sets keyboard traversal to the edit window of a
DtEditor widget.
DtEditorUndoEdit()
Undoes the last edit made by a user.
FILES
/usr/dt/lib/nls/msg/$LANG/DtWidget.cat()
Message catalog for DtWidget library.
SEE ALSO
DtEditor(5), DtCreateEditor(3), DtEditorAppend(3), DtEdi-
torAppendFromFile(3), DtEditorChange(3), DtEditorCheckForUn-
savedChanges(3), DtEditorClearSelection(3), DtEditorCopyTo-
Clipboard(3), DtEditorCutToClipboard(3), DtEditor-
DeleteSelection(3), DtEditorDeselect(3), DtEditorDisa-
bleRedisplay(3), DtEditorEnableRedisplay(3), DtEditor-
Find(3), DtEditorFormat(3), DtEditorGetContents(3), DtEdi-
torGetInsertionPosition(3), DtEditorGetLastPosition(3),
DtEditorGetMessageTextFieldID(3), DtEditorGetSizeHints(3),
DtEditorGoToLine(3), DtEditorInsert(3), DtEditorInsertFrom-
File(3), DtEditorInvokeFindChangeDialog(3), DtEditorIn-
vokeFormatDialog(3), DtEditorInvokeSpellDialog(3), DtEditor-
PasteFromClipboard(3), DtEditorReplace(3), DtEditorRepla-
ceFromFile(3), DtEditorReset(3), DtEditorSaveContentsTo-
File(3), DtEditorSelectAll(3), DtEditorSetContents(3),
DtEditorSetContentsFromFile(3), DtEditorSetInsertionPosi-
tion(3), DtEditorTraverseToEditor(3), DtEditorUndoEdit(3);
Composite(3X), Constraint(3X), Core(3X),
XmBulletinBoard(3X), XmFontList(3X), XmForm(3X),
XmManager(3X), XmTextField(3X).
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