66 lines
2.9 KiB
Plaintext
66 lines
2.9 KiB
Plaintext
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;;;;
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;;;; STk adaptation of the Tk widget demo.
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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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(require "Tk-classes")
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(define (demo-text)
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(let ((w (make-demo-toplevel "text"
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"Text Demonstration - Basic Facilities"
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"")))
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(pack (make <Text> :relief "sunken"
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:parent w
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:border-width 2
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:set-grid #t
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:height 30
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:value
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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.
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7. Resize the window. This widget has been configured with the \"set-grid\"
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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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:side "top"
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:padx 5
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:fill "both")))
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