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 1.3 2001/11/15 11:55:26 dkf 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 -undo 1 -autosep 1 |
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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. Control-z undoes the last editing action performed, |
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70 | and } |
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71 | |
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72 | switch $tcl_platform(platform) { |
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73 | "unix" - "macintosh" { |
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74 | $w.text insert end "Control-Shift-z" |
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75 | } |
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76 | "windows" { |
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77 | $w.text insert end "Control-y" |
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78 | } |
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79 | } |
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80 | |
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81 | $w.text insert end { redoes undone edits. |
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82 | |
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83 | 7. Resize the window. This widget has been configured with the "setGrid" |
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84 | option on, so that if you resize the window it will always resize to an |
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85 | even number of characters high and wide. Also, if you make the window |
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86 | narrow you can see that long lines automatically wrap around onto |
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87 | additional lines so that all the information is always visible.} |
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88 | $w.text mark set insert 0.0 |
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