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Title: Programming/Languages/REBOL/REBOL-View - REBOL/View FAQ Frequently asked questions from the listserv at ally@rebol.com .
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REBOL Forces - View FAQ
May 2002 : REBOL FORCES
Main Menu
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View FAQ
Author: Allen Kamp
Date: June, 2001
Purpose: A collection of hints, tips and wisdom from
the Rebol Ally list
Contents
1. General
1.1. Q. How do I access the clipboard ?
1.2. Q. How do I launch my web browser in Kiosk mode?
2. VID
2.1. Q. How do I set the check value?
2.2. Q. How can I find out the value of a checkbox?
2.3. Q. How do I change the title bar text?
2.4. Q. How can I highlight text in a face?
2.5. Q. Where can I find the source for VID?
2.6. Q. How can I modify LIST faces dynamically?
3. Face
3.1. Q. Where can I find the screen size?
3.2. Q. Where can I find my main window face?
3.3. Q. How can I trap the 'close window event?
3.4. Q. How can I see what key events are generated?
4. Tips
4.1. Be specific with show
4.2. Take Care with shortcut keys
1. General
1.1. Q. How do I access the clipboard ?
A. The Field and Area elements of VID respond to the keyboard shortcuts of
Ctrl X - CutCtrl C - CopyCtrl V - Paste
But you can also manually read or write from/to the clipboard.
To paste text to the clipboard
write clipboard:// "Hello World"
To copy from the clipboard
read clipboard://== "Hello World"
1.2. Q. How do I launch my web browser in Kiosk mode?
A. Use -k. This is known to work for IE, other browers may have similar flags
browse "-k http://www.rebol.com"
use Alt-F4 to close.
2. VID
2.1. Q. How do I set the check value?
A. VID is extremely flexible, here are some different ways.
Using 'with
view layout [chk1: check with [data: true]
Using a boolean value to set it during creation
view layout [ check on check off check true check false check yes check no]
Using a style
checkers: stylize [ true-check: check with [data: true]] view layout [styles checkers chk1: true-check chk2: check]]
Using 'do inside a layout to set the value
view layout [chk1: check do [chk1/data: true]]
Create the layout and set the value of the checkbox before showing it
checks: layout [chk1: check chk2: check]chk1/data: trueview checks
Change from a button action
view layout [chk1: check on button "Change" [chk1/data: not chk1/data show chk1]]
2.2. Q. How can I find out the value of a checkbox?
A. The current value of the checkbox is stored in face/data
view layout [ txt: text "" 60x26 chk1: check button "State?" [txt/text: form chk1/data show txt] do [txt/text: form chk1/data show txt] ; set txt to chk1 starting state]
2.3. Q. How do I change the title bar text?
A. Currently the window face has to be unviewed and reviewed to make a change.
view/title me: layout [size 300x100 button "change title" [unview/all view/title me "after" ]] "before"
or
view/title me: layout [size 300x100 button "change title" [unview/all me/text: "after" view me]] "before"
2.4. Q. How can I highlight text in a face?
A. The field can now does this automatically. But if you want to do it manually, this function sets focus to the face and highlights the text, so it will be cleared with users first keystroke.
highlight-text: func [face][ focus face system/view/highlight-start: head face/text system/view/highlight-end: tail face/text system/view/caret: head face/text] view layout [name: field "<enter your name>" do [highlight-text name]]
2.5. Q. Where can I find the source for VID?
A. You can probe system/view/vid to see the VID source code to get a good idea for how it works. This is helpful if you are thinking about creating your own interface dialect for specific purposes, or have found some problem with VID that you need to patch. For a current print out, type the following in the console
>> save %view.txt system/view
(For VID history buffs only: a very old version can be found here |
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