text.tcl
上传用户:rrhhcc
上传日期:2015-12-11
资源大小:54129k
文件大小:4k
- # 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