[37] | 1 | # text.tcl -- |
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| 2 | # |
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| 3 | # This demonstration script creates a text widget that describes |
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| 4 | # the basic editing functions. |
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| 5 | # |
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| 6 | # RCS: @(#) $Id: text.tcl,v 1.2 1998/09/14 18:23:30 stanton Exp $ |
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| 7 | |
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| 8 | if {![info exists widgetDemo]} { |
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| 9 | error "This script should be run from the \"widget\" demo." |
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| 10 | } |
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| 11 | |
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| 12 | set w .text |
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| 13 | catch {destroy $w} |
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| 14 | toplevel $w |
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| 15 | wm title $w "Text Demonstration - Basic Facilities" |
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| 16 | wm iconname $w "text" |
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| 17 | positionWindow $w |
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| 18 | |
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| 19 | frame $w.buttons |
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| 20 | pack $w.buttons -side bottom -fill x -pady 2m |
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| 21 | button $w.buttons.dismiss -text Dismiss -command "destroy $w" |
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| 22 | button $w.buttons.code -text "See Code" -command "showCode $w" |
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| 23 | pack $w.buttons.dismiss $w.buttons.code -side left -expand 1 |
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| 24 | |
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| 25 | text $w.text -relief sunken -bd 2 -yscrollcommand "$w.scroll set" -setgrid 1 \ |
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| 26 | -height 30 |
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| 27 | scrollbar $w.scroll -command "$w.text yview" |
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| 28 | pack $w.scroll -side right -fill y |
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| 29 | pack $w.text -expand yes -fill both |
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| 30 | $w.text insert 0.0 \ |
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| 31 | {This window is a text widget. It displays one or more lines of text |
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| 32 | and allows you to edit the text. Here is a summary of the things you |
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| 33 | can do to a text widget: |
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| 34 | |
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| 35 | 1. Scrolling. Use the scrollbar to adjust the view in the text window. |
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| 36 | |
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| 37 | 2. Scanning. Press mouse button 2 in the text window and drag up or down. |
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| 38 | This will drag the text at high speed to allow you to scan its contents. |
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| 39 | |
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| 40 | 3. Insert text. Press mouse button 1 to set the insertion cursor, then |
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| 41 | type text. What you type will be added to the widget. |
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| 42 | |
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| 43 | 4. Select. Press mouse button 1 and drag to select a range of characters. |
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| 44 | Once you've released the button, you can adjust the selection by pressing |
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| 45 | button 1 with the shift key down. This will reset the end of the |
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| 46 | selection nearest the mouse cursor and you can drag that end of the |
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| 47 | selection by dragging the mouse before releasing the mouse button. |
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| 48 | You can double-click to select whole words or triple-click to select |
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| 49 | whole lines. |
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| 50 | |
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| 51 | 5. Delete and replace. To delete text, select the characters you'd like |
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| 52 | to delete and type Backspace or Delete. Alternatively, you can type new |
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| 53 | text, in which case it will replace the selected text. |
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| 54 | |
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| 55 | 6. Copy the selection. To copy the selection into this window, select |
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| 56 | what you want to copy (either here or in another application), then |
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| 57 | click button 2 to copy the selection to the point of the mouse cursor. |
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| 58 | |
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| 59 | 7. Edit. Text widgets support the standard Motif editing characters |
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| 60 | plus many Emacs editing characters. Backspace and Control-h erase the |
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| 61 | character to the left of the insertion cursor. Delete and Control-d |
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| 62 | erase the character to the right of the insertion cursor. Meta-backspace |
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| 63 | deletes the word to the left of the insertion cursor, and Meta-d deletes |
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| 64 | the word to the right of the insertion cursor. Control-k deletes from |
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| 65 | the insertion cursor to the end of the line, or it deletes the newline |
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| 66 | character if that is the only thing left on the line. Control-o opens |
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| 67 | a new line by inserting a newline character to the right of the insertion |
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| 68 | cursor. Control-t transposes the two characters on either side of the |
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| 69 | insertion cursor. |
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| 70 | |
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| 71 | 7. Resize the window. This widget has been configured with the "setGrid" |
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| 72 | option on, so that if you resize the window it will always resize to an |
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| 73 | even number of characters high and wide. Also, if you make the window |
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| 74 | narrow you can see that long lines automatically wrap around onto |
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| 75 | additional lines so that all the information is always visible.} |
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| 76 | $w.text mark set insert 0.0 |
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