# text.tcl --

#

# This demonstration script creates a text widget that describes

# the basic editing functions.

#

# RCS: @(#) $Id: text.tcl,v 1.3 2001/11/15 11:55:26 dkf Exp $

if {![info exists widgetDemo]} {

    error "This script should be run from the \"widget\" demo."

}

set w .text

catch {destroy $w}

toplevel $w

wm title $w "Text Demonstration - Basic Facilities"

wm iconname $w "text"

positionWindow $w

frame $w.buttons

pack $w.buttons -side bottom -fill x -pady 2m

button $w.buttons.dismiss -text Dismiss -command "destroy $w"

button $w.buttons.code -text "See Code" -command "showCode $w"

pack $w.buttons.dismiss $w.buttons.code -side left -expand 1

text $w.text -relief sunken -bd 2 -yscrollcommand "$w.scroll set" -setgrid 1 \

	-height 30 -undo 1 -autosep 1

scrollbar $w.scroll -command "$w.text yview"

pack $w.scroll -side right -fill y

pack $w.text -expand yes -fill both

$w.text insert 0.0 \

{This window is a text widget.  It displays one or more lines of text

and allows you to edit the text.  Here is a summary of the things you

can do to a text widget:

1. Scrolling. Use the scrollbar to adjust the view in the text window.

2. Scanning. Press mouse button 2 in the text window and drag up or down.

This will drag the text at high speed to allow you to scan its contents.

3. Insert text. Press mouse button 1 to set the insertion cursor, then

type text.  What you type will be added to the widget.

4. Select. Press mouse button 1 and drag to select a range of characters.

Once you've released the button, you can adjust the selection by pressing

button 1 with the shift key down.  This will reset the end of the

selection nearest the mouse cursor and you can drag that end of the

selection by dragging the mouse before releasing the mouse button.

You can double-click to select whole words or triple-click to select

whole lines.

5. Delete and replace. To delete text, select the characters you'd like

to delete and type Backspace or Delete.  Alternatively, you can type new

text, in which case it will replace the selected text.

6. Copy the selection. To copy the selection into this window, select

what you want to copy (either here or in another application), then

click button 2 to copy the selection to the point of the mouse cursor.

7. Edit.  Text widgets support the standard Motif editing characters

plus many Emacs editing characters.  Backspace and Control-h erase the

character to the left of the insertion cursor.  Delete and Control-d

erase the character to the right of the insertion cursor.  Meta-backspace

deletes the word to the left of the insertion cursor, and Meta-d deletes

the word to the right of the insertion cursor.  Control-k deletes from

the insertion cursor to the end of the line, or it deletes the newline

character if that is the only thing left on the line.  Control-o opens

a new line by inserting a newline character to the right of the insertion

cursor.  Control-t transposes the two characters on either side of the

insertion cursor.  Control-z undoes the last editing action performed,

and }

switch $tcl_platform(platform) {

    "unix" - "macintosh" {

	$w.text insert end "Control-Shift-z"

    }

    "windows" {

	$w.text insert end "Control-y"

    }

}

$w.text insert end { redoes undone edits.

7. Resize the window.  This widget has been configured with the "setGrid"

option on, so that if you resize the window it will always resize to an

even number of characters high and wide.  Also, if you make the window

narrow you can see that long lines automatically wrap around onto

additional lines so that all the information is always visible.}

$w.text mark set insert 0.0