World: r3wp

Thanks a lot :) Before I do something completely wrong again... I 
also want to scroll to a certain line in the text area if possible. 
My approach now would be to see if I can somehow see how many lines 
of text are displayed in the text area, calculate the percentage 
of the line I want to scroll to based on this total number of lines, 
divide that by 100 and use it for a/pane/data. Right..?

Is that informatio available?

This seems to work:

display "test" [
	a: area (mold ctx-rebgui/colors)
	button [
		scroll-to-line: 5
		
		line-height: 30
		total-lines: (second size-text a) / line-height
		percent: ((scroll-to-line - 1) / (total-lines / 100)) / 100
		a/pane/data: percent
		show a
	]
]


The height of a line is hardcoded though which means it stops working 
if the font size is changed. Is there a way to get the current line 
height?

presumably you need to get the font information out

a/font/size gives me the font size, which is 12 by default. But does 
that help in getting the line height? Is there some kind of standard 
so that a font with the size 12 always has a height of font-size 
* something? Don't know anything about fonts...

Nor me ...

:) Thanks anyhow

but if you can get the font name, font size you should be able to 
create some text and then get the sizes from that

So, instead of using your whole area, just use one character in a 
face

Ah you mean like in an invisible text container? That should work, 
right. Thanks :)

Yep, something like that :)

ctx-rebgui/sizes/font-height

Thanks Ashley. That only shows the height for the default font though. 
I am displaying three text areas with different font sizes, so I 
set the font size in the areas directly. I had to use an invisible 
text area now anyway though because I forgot that to be able to scroll 
to a certain line in the text area I have to find out in which line 
a certain word, to which I want to scroll, actually is :) So now 
I made a test text area for this and positioned the "real" text area 
on top of it so that the test text area is completely covered by 
it. I copy the text up till the word I want to scroll to into the 
test text area and then look at the text size of the test text area 
and use that information to scroll the "real" text area to this word. 
It isn't working correctly yet but it should so I guess I just made 
a stupid mistake somewhere, have to look at it again tomorrow.

Good luck!  We need this for the spell checker

hi, how i can force a field to be disabled ?   i try myfield/options: 
[info]  but it don't work !!!!

You can toggle enabled/disabled with the set-state function.

Example app: display "test" [a: field do [set-state a]] do-events

great thank you very much ;-)

With build 216 I get this:-

>> display "" [f: field do [set-state f]] do-events
** Script Error: set-state expected state argument of type: logic
** Where: init
** Near: set-state f
But better result gives this:-

display "" [button disable] do-events ;- this simple (I can't change 
sending messages on my Mint, sorry for multi replays)

Just found out how to

... it doesn't

work (sorry again)

set-state f false

hi, i would like to change the image of a variable

my-image: image %./nophoto.jpg

i try this but i have a black image !!!!!

my-image/image:  make image! 60x80 load %./Photos/test.jpg show my-image

i wonder if set-values works ?

is missing a set-image ;-)

someone have a solution ?

rebgui 118

iam stupid ;-)    my-image/image: load-image %./Photos/test.jpg show 
my-image

Replace 'load-image with 'load unless you want to cache the image.

thanks Ashley,   do you find a way to correct Build 218 and drop-list, 
menu etc....    ?

Bit of a hiatis while R3 comes closer to fruition, so no.

Hi,

I want to give Rebgui a try for an app i need to do. So, i need a 
tree in there, which should be filled from database request  when 
the app starts. Not via button click.  Can anybody give me a small 
example how to achive this. Searched the docs, but couldn't find 
something like that.  And be kind with me as i am not too familiar 
with Rebgui till now. I downloaded build 218. What i tried so far 
is set-data via button, but that doesn't seem to work.  A sample 
would drastically shorten my way to get this working. Thanks in Advance!!

Tree is not a fully developed widget, so the easiest way of modifying 
it is to dynamically generate the spec. For example:

	blk: copy []
	append blk ["Pets" ["Cat" "Dog"] "Numbers" [1 2 3]]
	display "Test" compose/only [tree data (blk)]

Does this apply to regui 218?? I get an error, that display has no 
compose refinement!

OK , my fault. Should have studied the example more precisely. Now 
it is working perfectly. Thanks for your assistance.

You say that tree is not fully developed. Can tell me, what limitations 
it has?? Is tree able to react  on events, when i click on one of 
the branches of the tree??

Many widgets have accessor functions (e.g. add-row) that allow you 
to dynamically modify them. The tree widget lacks these but is fully 
functional in all other respects.

Are there any plans to update the widget in the near future or do 
you have other priorities?? Can you tell me which of the widgets 
already have these accessors, to have a look at??

Ashley - what is your status re RebGUI and its future? It seems to 
me, that R2 brach is not going to be further developed? And also 
- I noticed you mentioned some flawor of even more simplified RebGUI 
like engine for R3. Is this still a plan, or do you wait for how 
R3 VID emerges?

No immediate plans to update tree widget. For accessor functions, 
search for the word accessor in hhttp://www.dobeash.com/RebGUI/widgets.html

what is your status re RebGUI and its future?

 ... RebGUI does most of what *I* need it to do at present, but I'd 
 really prefer to be using R3 + SDK + Cool looking R3 GUI. I'm experimenting 
 with a minimalist GOB-based R3 GUI, but it's more an intellectual 
 pursuit to see how minamalist (and functional) I can get it ... so 
 don't hold your breath.

I have a menu as the top widget in my window. I think i tried every 
possible combination of the sizing attributes (#LOV, #HW, margin, 
tight and space). The menu sizes to nearly the full width of the 
window but keeps a distance (seems like 4x4)  from the rigth window 
border. Is there any explanation for this space on the right??

See margin, tight and pad ... http://www.dobeash.com/RebGUI/user-guide.html#section-3.4

Thorsten,  take a look at the point of sale application at http://re-bol.com/rebol_crash_course.html#section-5.14