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Full Discussion: I need a reply
Top Forums UNIX for Dummies Questions & Answers I need a reply Post 302451120 by fpmurphy on Sunday 5th of September 2010 09:32:20 PM
Old 09-05-2010
The pg utility meets your requirements. It may or may not be available on your unspecified platform.
 

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TextEditor(3I)						    InterViews Reference Manual 					    TextEditor(3I)

NAME
TextEditor - basic unstructured text editing SYNOPSIS
#include <InterViews/texteditor.h> DESCRIPTION
A TextEditor is an interactor that provides an interactive interface for simple text editing of a TextBuffer. TextEditor uses an editing model based on a single current selection. Editing operations operate on the text in the selection, alter the position or size of the selection, or scroll the display to view other parts of the text. TextEditor interprets a perspective for interactive scrolling using a scroller. TextEditor does not provide a default set of keyboard bindings. You can implement the key bindings you desire by subclassing and redefin- ing the Handle operation or by handling keyboard events in an entirely separate class. PUBLIC OPERATIONS
TextEditor(int rows, int cols, int tabsize, int highlight) ~TextEditor() Create or destroy an instance of TextEditor. The natural size of a TextEditor is specified by rows and columns. The TextEditor will be tall enough to display rows lines of text in the current font, and it will be wide enough to display columns characters. For proportionally-spaced fonts, the width of the character 'n' is taken to be representative. Tab characters in the text are expanded to multiples of tabsize character widths. The current selection highlighted with the text style highlight. void Edit(TextBuffer*, int index = 0) Specify the text buffer to edit. A text buffer must be specified before the TextEditor is displayed. The optional index parameter specifies the initial selection point. If necessary, the TextEditor is scrolled so that the selection point is visible. int Dot() int Mark() The current selection is bounded by two indices into the text buffer. By convention these indices are called dot and mark. Dot is the position at which text will be inserted and deleted. Mark locates the end of the selection that moves as the selection is modi- fied. When the selection is empty (an insertion point), dot and mark are equal. void InsertText(const char* string, int count) void DeleteText(int count) void DeleteSelection() Edit the text buffer at the current selection. InsertText inserts count characters from string after dot. The selection becomes an insertion point following the newly inserted text. DeleteText deletes count characters at dot. If count is positive, the charac- ters following dot are deleted; if count is negative the characters before dot are deleted. The selection becomes an insertion point in the place of the deleted text. DeleteSelection deletes the text between dot and mark, changing the selection to an inser- tion point. void BackwardCharacter(int count) void ForwardCharacter(int count) void BackwardLine(int count) void ForwardLine(int count) void BackwardWord(int count) void ForwardWord(int count) void BackwardPage(int count) void ForwardPage(int count) Move the current selection forward or backward by the specified number of the specified units. The default movement is one unit. The selection is not moved before the beginning of after the end of the text. void BeginningOfLine() void EndOfLine() void BeginningOfWord() void EndOfWord() void BeginningOfSelection() void EndOfSelection() void BeginningOfText() void EndOfText() Move the current selection forwards or backwards to the specified feature of the text. void ScrollToSelection(boolean always = false) void SetScrollAlignment(Alignment) Alignment GetScrollAlignment() ScrollToSelction scrolls the display so that dot will be visible. If dot is currently visible and always is false, no scrolling takes place; if dot is not visible or always is true, the display is scrolled so that dot will be positioned as close as possible to the position specified by SetScrollAlignment. GetScrollAlignment returns the current scroll alignment. The default alignment is Center. void ScrollToView(Coord x, Coord y) void ScrollBy(Coord dx, Coord dy) ScrollToView scrolls the display so that the text currently at the position (x, y) will be visible. If the specified point is cur- rently visible, no scrolling takes place. ScrollBy specifies an amount by which to scroll the display. Positive values scroll the display upwards and to the right. In each case, the final position of the display is limited so that some text will be visible. void GrabScroll(Event&) void RateScroll(Event&) Initiate grab scrolling or rate scrolling. Once called, GrabScroll (RateScroll) polls the current mouse position as long as the middle (right) button is pressed. As GrabScroll polls, it scrolls the text to follow the mouse position, making it appear as though the user is dragging the text itself. Each time RateScroll polls the mouse, it scrolls the text by an amount corresponding to the differential between the current and initial mouse positions. This creates the illusion of a joystick interface: the further away the mouse is from its initial position, the greater the scrolling increment and the faster the text appears to scroll; scrolling slows down, stops, and reverses direction as the user drags the mouse back towards and past the initial position. void Select(int dot) void Select(int dot, int mark) void SelectMore(int mark) void SelectAll() Modify the current selection in terms of text indices. With a single parameter, Select moves both dot and mark to the specified index. With two parameters, dot and mark can be controlled independently. SelectMore leaves dot unchanged and moves mark. Selec- tAll sets dot to the end of the text and mark to the beginning. int Locate(Coord x, Coord y) Return the text index most closely matching the point (x, y). SEE ALSO
Interactor(2I), TextBuffer(3I) InterViews 24 May 1989 TextEditor(3I)
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