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89 lines
3.6 KiB
Tcl
89 lines
3.6 KiB
Tcl
15 years ago
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# text.tcl --
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#
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# This demonstration script creates a text widget that describes
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# the basic editing functions.
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#
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# RCS: @(#) $Id: text.tcl,v 1.3 2001/11/15 11:55:26 dkf Exp $
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if {![info exists widgetDemo]} {
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error "This script should be run from the \"widget\" demo."
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}
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set w .text
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catch {destroy $w}
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toplevel $w
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wm title $w "Text Demonstration - Basic Facilities"
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wm iconname $w "text"
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positionWindow $w
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frame $w.buttons
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pack $w.buttons -side bottom -fill x -pady 2m
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button $w.buttons.dismiss -text Dismiss -command "destroy $w"
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button $w.buttons.code -text "See Code" -command "showCode $w"
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pack $w.buttons.dismiss $w.buttons.code -side left -expand 1
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text $w.text -relief sunken -bd 2 -yscrollcommand "$w.scroll set" -setgrid 1 \
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-height 30 -undo 1 -autosep 1
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scrollbar $w.scroll -command "$w.text yview"
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pack $w.scroll -side right -fill y
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pack $w.text -expand yes -fill both
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$w.text insert 0.0 \
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{This window is a text widget. It displays one or more lines of text
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and allows you to edit the text. Here is a summary of the things you
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can do to a text widget:
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1. Scrolling. Use the scrollbar to adjust the view in the text window.
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2. Scanning. Press mouse button 2 in the text window and drag up or down.
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This will drag the text at high speed to allow you to scan its contents.
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3. Insert text. Press mouse button 1 to set the insertion cursor, then
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type text. What you type will be added to the widget.
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4. Select. Press mouse button 1 and drag to select a range of characters.
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Once you've released the button, you can adjust the selection by pressing
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button 1 with the shift key down. This will reset the end of the
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selection nearest the mouse cursor and you can drag that end of the
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selection by dragging the mouse before releasing the mouse button.
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You can double-click to select whole words or triple-click to select
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whole lines.
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5. Delete and replace. To delete text, select the characters you'd like
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to delete and type Backspace or Delete. Alternatively, you can type new
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text, in which case it will replace the selected text.
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6. Copy the selection. To copy the selection into this window, select
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what you want to copy (either here or in another application), then
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click button 2 to copy the selection to the point of the mouse cursor.
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7. Edit. Text widgets support the standard Motif editing characters
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plus many Emacs editing characters. Backspace and Control-h erase the
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character to the left of the insertion cursor. Delete and Control-d
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erase the character to the right of the insertion cursor. Meta-backspace
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deletes the word to the left of the insertion cursor, and Meta-d deletes
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the word to the right of the insertion cursor. Control-k deletes from
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the insertion cursor to the end of the line, or it deletes the newline
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character if that is the only thing left on the line. Control-o opens
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a new line by inserting a newline character to the right of the insertion
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cursor. Control-t transposes the two characters on either side of the
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insertion cursor. Control-z undoes the last editing action performed,
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and }
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switch $tcl_platform(platform) {
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"unix" - "macintosh" {
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$w.text insert end "Control-Shift-z"
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}
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"windows" {
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$w.text insert end "Control-y"
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}
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}
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$w.text insert end { redoes undone edits.
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7. Resize the window. This widget has been configured with the "setGrid"
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option on, so that if you resize the window it will always resize to an
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even number of characters high and wide. Also, if you make the window
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narrow you can see that long lines automatically wrap around onto
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additional lines so that all the information is always visible.}
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$w.text mark set insert 0.0
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