XmText Action Routines

The following list describes the XmText action routines.

left-character(extend)

If the XmNeditPolicy is XmEDIT_LOGICAL and it is called without arguments, the insertion cursor moves back logically by a character. If the insertion cursor is at the beginning of the line, the insertion cursor moves to the logical last character of the previous line, if one exists. Otherwise, the insertion cursor position doesn't change.

If the XmNeditPolicy is XmEDIT_VISUAL, then the cursor moves to the left of the cursor position. If the insertion cursor is at the beginning of the line, then it moves to the end character of the previous line, if one exists.

If left-character() is called with an extend argument, the insertion cursor moves as in the case of no argument, and extends the current selection.

The left-character() action produces calls to the XmNmotionVerifyCallback procedures with the reason value XmCR_MOVING_INSERT_CURSOR. If called with an extend argument, this action can produce calls to the XmNgainPrimaryCallback procedures. See the callback description in the Motif Programmer's Reference for more information.

right-character(extend)

If the XmNeditPolicy is XmEDIT_LOGICAL and it is called without any arguments, the insertion cursor moves logically forward by a character. If the insertion cursor is at the logical end of the line, this action moves the insertion cursor to the logical start of the next line, if one exists.

If the XmNeditPolicy is XmEDIT_VISUAL, then the cursor moves to the right of the cursor position. If the insertion cursor is at the end of the line, it moves the insertion cursor to the starting of the next line, if one exists.

If called with an argument of extend, XmNeditPolicy moves the insertion cursor as in the case of no argument, and extends the current selection.

The right-character() action produces calls to the XmNmotionVerifyCallback procedures with the reason value XmCR_MOVING_INSERT_CURSOR. If called with extend argument, this action can produce calls to the XmNgainPrimaryCallback procedures. See the callback description in the Motif Programmer's Reference for more information.

right-word(extend)

If the XmNeditPolicy is XmEDIT_LOGICAL and it is called without any arguments, the insertion cursor moves to the logical starting character of the logical succeeding word, if one exists. Otherwise, the cursor moves to the logical end of the current word. If the insertion cursor is at the logical end of the line or in the logical last word of the line, the cursor moves to the logical first word in the next line, if one exists. Otherwise, the cursor moves to the logical end of the current word.

If the XmNeditPolicy is XmEDIT_VISUAL and it is called without arguments, the insertion cursor moves to the first non whitespace character after the first white space character to the right or after the end of the line.

If called with an argument of extend, the insertion cursor moves as in the case of no argument and extends the current selection.

The left-word() action produces calls to the XmNmotionVerifyCallback procedures with the reason value XmCR_MOVING_INSERT_CURSOR. If called with extend argument, this action can produce calls to the XmNgainPrimaryCallback procedures. See the callback description in the Motif Programmer's Reference for more information.

delete-left-character()

If the XmNeditPolicy is XmEDIT_LOGICAL, it is equivalent to delete-previous-char(). If the XmNeditPolicy is XmEDIT_VISUAL, then in normal mode, if the selection is non-null, it deletes the selection. Otherwise this action deletes the character to the left of the insertion cursor. In add mode, if the selection is non-null, the cursor is not disjointed from the selection, and XmNpendingDelete is set to True, this action deletes the selection. Otherwise, the action deletes the character to the left of the insertion cursor, which can affect the selection.

The delete-left-character() action produces calls to the XmNmodifyVerifyCallback procedures with the reason value XmCR_MODIFYING_TEXT_VALUE and the XmNvalueChangedCallback procedures with the reason value XmCR_VALUE_CHANGED.

delete-right-character()

If the XmNeditPolicy is XmEDIT_VISUAL, it is equivalent to delete-next-character(). If the XmNeditPolicy is XmEDIT_VISUAL, then in normal mode, if the selection is a non-null, it deletes the selection. Otherwise, it deletes the character to the right of the insertion cursor. In add mode, if there is a non-null selection and the cursor is not disjointed from the selection, the XmNpendingDelete is set to True and the selection is deleted. Otherwise, the character to the right of the insertion cursor is deleted. This action can affect the selection.

The delete-right-character() action produces calls to the XmNmodifyVerify-Callback procedures with reason value XmCR_MODIFYING_TEXT_VALUE, and the XmNvalue-ChangedCallback procedures with reason value XmCR_VALUE_CHANGED.

A few cell-based routines are implemented to support character composition, ligatures, and diacritics. In other words, two or more characters might be represented by a single glyph occupying one presentation cell.

The XmText cell action routines are as described in the following list.

backward-cell(extend)

Moves the insertion cursor back one cell. If the XmNeditPolicy is XmEDIT_LOGICAL, then the insertion cursor is moved to the start of the cell that precedes the current cell logically, if one exists. Otherwise, the cursor moves to the start of the current cell.

If the XmNeditPolicy is XmEDIT_VISUAL, then the cursor moves to the start of cell to the left of the cursor, if one exists. The prev-cell() action produces calls to the XmNmotionVerifyCallback procedures with the reason value XmCR_MOVING_INSERT_CURSOR. If called with an extend argument, this action can produce calls to the XmNgainPrimaryCallback procedures. See the callback description in the Motif Programmer's Reference for more information.

forward-cell(extend)

Moves the insertion cursor to the start of the logical next cell, if one exists. Otherwise this action moves the cursor to the end of the cell. If the XmNeditPolicy is XmEDIT_LOGICAL, then the cursor moves forward one cell.

If the XmNeditPolicy is XmEDIT_VISUAL, then the cursor moves to the start of the cell to the right of the cursor position, if one exists; otherwise, it moves to the end of the current cell. The forward-cell() action produces calls to the XmNmotionVerifyCallback procedures with the reason value XmCR_MOVING_INSERT_CURSOR. If called with an extend argument, this action can produce calls to the XmNgainPrimaryCallback procedures. See the callback description in the Motif Programmer's Reference for more information.