HP OpenVMS Systems Documentation

DECwindows Extensions to Motif

You can use SVN to display hierarchical information in three different formats, or modes:

Outline format.
Tree format, which can be oriented from the top, the left, in outline form, and in a user-defined style.
Column format, which differs from outline format in that a window pane separates a set of components from the rest of the display. You can scroll horizontally on each side, independently of the other side. However, you have only one vertical scroll bar.

Each SVN line, or entry, in your hierarchy can display as many as thirty pieces of information (called components) depending on the amount of information users need. The components can be of three data types: text, pixmaps, and widgets.

The SVN widget includes additional support routines (also described in this document) that allow your application to insert and remove components, set the text associated with a component, set a component to be hidden, set and determine a component's width, and determine a component's number.

When you create an SVN widget, note that applications must be able to communicate with the widget through Toolkit routine calls that request information about and manipulate selections. As such, when you use the DXmCreateSvn routine to create the SVN widget, you must include the following SVN callbacks:

DXmSvnNattachToSourceCallback
DXmSvnNgetEntryCallback
DXmSvnNselectAndConfirmCallback

See the DECwindows Motif Guide to Application Programming for a complete description of the SVN widget. See also the following SVN routines for related information.

Routine	Description
DXmSvnAddEntries	Opens new entries in the structure.
DXmSvnAutoScrollCheck	Determines whether the DXmSvnAutoScrollDisplay routine should be called.
DXmSvnAutoScrollDisplay	Automatically scrolls the screen one unit based on the cursor position.
DXmSvnClearHighlight	Removes (clears) highlighting from a specified entry.
DXmSvnClearHighlighting	Removes (clears) all highlighting from the entries.
DXmSvnClearSelection	Clears (cancels) the selection of a specified entry.
DXmSvnClearSelections	Clears (cancels) all selections.
DXmSvnDeleteEntries	Deletes entries from the structure.
DXmSvnDisableDisplay	Temporarily disables the SVN widget from generating a display.
DXmSvnEnableDisplay	Reenables the SVN widget.
DXmSvnFlushEntry	Displays the specified entry on the screen if it is the next logically displayed entry.
DXmSvnGetComponentNumber	Retrieves (returns) the component number containing a supplied tag value.
DXmSvnGetComponentTag	Retrieves (returns) a component tag for a specified component number.
DXmSvnGetComponentText	Retrieves (returns) the address of a compound string.
DXmSvnGetComponentWidth	Retrieves (returns) the width of a specified component.
DXmSvnGetDisplayed	Retrieves (returns) displayed entry numbers and related information necessary to draw a corresponding display.
DXmSvnGetEntryLevel	Retrieves (returns) the level of an entry in the display.
DXmSvnGetEntryNumber	Retrieves (returns) the entry number for a specified entry tag value.
DXmSvnGetEntryPosition	Retrieves (returns) the position of an entry in the display.
DXmSvnGetEntrySensitivity	Retrieves (returns) the sensitivity of an entry in the display.
DXmSvnGetEntryTag	Retrieves (returns) an entry's tag for a specified entry number.
DXmSvnGetHighlighted	Retrieves (returns) a list of entries currently highlighted by the user.
DXmSvnGetNumDisplayed	Retrieves (returns) the number of entries currently being displayed in the window.
DXmSvnGetNumHighlighted	Retrieves (returns) the number of highlighted entries.
DXmSvnGetNumSelections	Retrieves (returns) the number of selected entries.
DXmSvnGetPrimaryWorkWidget	Retrieves (returns) the widget ID of the primary SVN work widget (window).
DXmSvnGetSecondaryWorkWidget	Retrieves (returns) the widget ID of the secondary SVN work widget (window).
DXmSvnGetSelections	Retrieves (returns) a list of selected entry numbers.
DXmSvnGetTreePosition	Retrieves (returns) the position of the display window for future use.
DXmSvnHideHighlighting	Specifies that the SVN widget show highlighted entries in the default format, without using highlighting graphics.
DXmSvnHideSelections	Specifies that the SVN widget show selected entries in the default format, without using selection graphics.
DXmSvnHighlightAll	Highlights all entries.
DXmSvnHighlightEntry	Highlights a specified entry.
DXmSvnInsertComponent	Inserts a new component into each SVN entry.
DXmSvnInvalidateEntry	Specifies that the SVN widget redisplay (update) an entry.
DXmSvnMapPosition	Associates the x and y position with an entry number.
DXmSvnPositionDisplay	Displays a specified entry.
DXmSvnRemoveComponent	Removes a component from each SVN entry.
DXmSvnSelectAll	Selects all entries.
DXmSvnSelectComponent	Selects a specified entry using a particular component.
DXmSvnSelectEntry	Selects a specified entry.
DXmSvnSetApplDragging	Turns application dragging mode on or off in the SVN widget.
DXmSvnSetComponentHidden	Controls which modes the SVN widget uses to display a particular component.
DXmSvnSetComponentPixmap	Adds a pixmap component to an entry.
DXmSvnSetComponentTag	Sets the tag of a component.
DXmSvnSetComponentText	Adds a read-only component string to an entry.
DXmSvnSetComponentWidget	Adds an SVN subwidget component to an entry.
DXmSvnSetComponentWidth	Sets the width of a component.
DXmSvnSetEntry	Provides the SVN widget with new entry level information.
DXmSvnSetEntryIndexWindow	Controls whether the SVN widget displays the entry in the index window.
DXmSvnSetEntryNumComponents	Provides the SVN widget with the number of components for an entry.
DXmSvnSetEntryPosition	Sets the position of an entry in user-defined tree mode.
DXmSvnSetEntrySensitivity	Controls whether the user can select a particular entry.
DXmSvnSetEntryTag	Sets an entry tag with a specified entry.
DXmSvnSetTreePosition	Sets the position of the tree in tree display mode.
DXmSvnShowHighlighting	Specifies that the SVN widget use highlight graphics when showing highlighted entries.
DXmSvnShowSelections	Specifies that the SVN widget use selection graphics on the entries when showing selections.
DXmSvnValidateAll	Ensures that all entries are valid.

DXmCSContainsStringCharSet

Examines XmString segments for ISO_LATIN_1 characters.

Format

Boolean DXmCSContainsStringCharSet(str)
         XmString  str;

Return Value

A Boolean value that, when True, indicates that all XmString segments contain characters from the ISO_LATIN_1 character set.

Arguments

str
A compound string.

Description

The DXmCSContainsStringCharSet routine examines all XmString segments in the application for characters belonging to the ISO_LATIN_1 character set. If non-ISO_LATIN_1 characters are detected, this routine will return False.

DXmCSTextClearSelection

Clears (cancels) the global selection highlighted in the compound string text widget.

Format

void DXmCSTextClearSelection(widget, time)
      Widget  widget;
      Time    time;

Arguments

widget
The identifier (widget ID) of the compound string text widget.
time
The time of the event that generated the call to DXmCSTextClearSelection.

Description

The DXmCSTextClearSelection routine clears (cancels) the global selection highlighted in the compound string text widget. See the DXmCreateCSText, DXmCSTextGetSelection, and DXmCSTextSetSelection routines for related information.

DXmCSTextCopy

Copies the currently selected (highlighted) text to the clipboard.

Format

Boolean DXmCSTextCopy (widget, time)
         Widget  widget;
         Time    time;

Return Value

A Boolean value that, when True, indicates that the text has been successfully copied to the clipboard.

Arguments

widget
The identifier (widget ID) of the compound string text widget.
time
The time of the event that generated the call to DXmCSTextCopy.

Description

The DXmCSTextCopy routine copies the selected (highlighted) text in the compound string text widget to the clipboard, returning the success or failure of that operation. (See the OSF/Motif Programmer's Reference and the OSF/Motif Programmer's Guide for more information about the clipboard.) See the DXmCreateCSText, DXmCSTextCut, DXmCSTextPaste, and DXmCSTextRemove routines for related information.

DXmCSTextCut

Deletes the currently selected (highlighted) text after copying it to the clipboard.

Format

Boolean DXmCSTextCut(widget, time)
         Widget  widget;
         Time    time;

Return Value

A Boolean value that, when True, indicates that the text has been successfully copied to the clipboard and then deleted.

Arguments

widget
The identifier (widget ID) of the compound string text widget.
time
The time of the event that generated the call to DXmCSTextCut.

Description

The DXmCSTextCut routine deletes (cuts) the selected (highlighted) text in the compound string text widget after copying the text to the clipboard, returning the success or failure of that operation. (See the OSF/Motif Programmer's Reference and the OSF/Motif Programmer's Guide for more information about the clipboard.) See the DXmCreateCSText, DXmCSTextCopy, DXmCSTextPaste, and DXmCSTextRemove routines for related information.

DXmCSTextDisableRedisplay

Temporarily prevents the visual update of the DXmCSText widget

Format

void DXmCSTextDisableRedisplay(widget)
        Widget  widget;

Arguments

widget
The identifier (widget ID) of the compound string text widget.

Description

The DXmCSTextDisableRedisplay routine prevents redisplay of the specified DXmCSText widget even though its visual attributes have been modified. The visual appearance of the widget remains unchanged until DXmCSTextEnableRedisplay is called. This allows an application to make multiple changes to the widget without causing intermediate visual updates.

DXmCSTextEnableRedisplay

Forces the visual update of the DXmCSText widget.

Format

void DXmCSTextEnableRedisplay(widget)
        Widget  widget;

Arguments

widget
The identifier (widget ID) of the compound string text widget.

Description

The DXmCSTextEnableRedisplay is used in conjunction with DXmCSTextDisableRedisplay, which suppresses visual update of DXmCSText. When DXmCSTextEnableRedisplay is called, it determines if any visual attributes have been set or modified for the specified widget since DXmCSTextDisableRedisplay was called. If so, it forces the widget to update its visual display for all of the intervening changes. Any subsequent changes that affect visual appearance cause the widget to update its visual display.

DXmCSTextGetEditable

Indicates whether the text in the compound string text widget can be edited by the user.

Format

Boolean DXmCSTextGetEditable(widget)
         Widget  widget;

Return Value

A Boolean value that, when True, indicates that the user can edit the text in the compound string text widget. When False, the user cannot edit the text.

Arguments

widget
The identifier (widget ID) of the compound string text widget.

Description

The DXmCSTextGetEditable routine indicates, by returning True or False, whether the text in the compound string text widget can be edited by the user. See the DXmCreateCSText and DXmCSTextSetEditable routines for related information.

DXmCSTextGetInsertionPosition

Retrieves (returns) the logical position of the insertion cursor.

Format

DXmCSTextPosition DXmCSTextGetInsertionPosition(widget)
                   Widget  widget;

Return Value

An integer that represents the logical position of the cursor, by number of characters from the beginning of the text buffer.

Arguments

widget
The identifier (widget ID) of the compound string text widget.

Description

The DXmCSTextGetInsertionPosition routine retrieves the logical position of the insertion cursor by returning an integer that indicates the distance (in number of characters) between the cursor and the beginning of the text buffer. See the DXmCSTextSetInsertionPosition for related information.

DXmCSTextGetLastPosition

Retrieves (returns) the logical position of the last character in the text.

Format

DXmCSTextPosition DXmCSTextGetLastPosition(widget)
                   Widget  widget;

Return Value

An integer that represents the logical position of the last character in the text buffer.

Arguments

widget
The identifier (widget ID) of the compound string text widget.

Description

The DXmCSTextGetLastPosition routine retrieves the logical position of the last character in the text by returning an integer. The position may correspond to a line feed.

DXmCSTextGetMaxLength

Retrieves (returns) current maximum allowable length of the text in the compound string text widget.

Format

int DXmCSTextGetMaxLength(widget)
     Widget  widget;

Return Value

An integer that represents the maximum allowable length, in characters, of the text in the compound string text widget.

Argument

widget
The identifier (widget ID) of the compound string text widget.

Description

The DXmCSTextGetMaxLength routine retrieves the current maximum allowable length of the text in the compound string text widget by returning an integer. See the DXmCreateCSText and DXmCSTextSetMaxLength routines for related information.

DXmCSTextGetSelection

Retrieves the text selected in the compound string text widget.

Format

XmString DXmCSTextGetSelection(widget)
          Widget  widget;

Return Value

A pointer to the selected text compound string.

Argument

widget
The identifier (widget ID) of the compound string text widget.

Description

The DXmCSTextGetSelection routine retrieves the text selected (highlighted) in the compound string text widget. It returns a Null pointer if no text is selected in the widget. The application is responsible for freeing the storage associated with the text by calling the Intrinsic routine XtStringFree.
See the DXmCreateCSText, DXmCSTextSetSelection, DXmCSTextClearSelection, DXmCSTextCut, DXmCSTextCopy, and DXmCSTextPaste routines for related information. See also the X Window System Toolkit manual for more information about using the Intrinsic routines.

DXmCSTextGetSelectionInfo

Retrieves (returns) the left and right positions of the currently selected text.

Format

Boolean DXmCSTextGetSelectionInfo (widget, left, right)
         Widget             widget;
         DXmCSTextPosition  *left;
         DXmCSTextPosition  *right;

Return Value

A Boolean value that, when False, indicates that there is no currently selected text; otherwise, the value is True.

Arguments

widget
The identifier (widget ID) of the compound string text widget.
left
The left logical position corresponding to the selected text.
right
The right logical position corresponding to the selected text.

Description

The DXmCSTextGetSelectionInfo routine, when True, returns the left and right logical positions corresponding to the currently selected (highlighted) text. If no text is selected, this routine returns False.

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