World: r3wp

I may add scaling, if it makes sense

So, will this work images etc?

image support depends on if postscript.r will get support for image!. 
currently it seems only to support direct loading of jpg, gif and 
bmp images.

image! support is necessary if we want to output the face/image and 
face/effect parts of a face

scaling now added. use to-postscript/scale my-layout 0.1 to increase 
precision by 10 times. this means you must create your layout 10 
times bigger.

so what elements can you support now?

text and ?

text and boxes

ok

DRAW is probably too hard to get in. I don't personally need it.

perhaps we should move this to the postscript group

Can you put bitmaps in a postscript file ?

(moved to Postscript group)

I've come across what seems to be an oddity with View on the Mac.Iit 
seems that the Rebol/View console is using UTF-8 encoding but that 
View is using MacRoman.

the "console" on Mac and Linux is just a terminal (OS provided), 
and they are usually UTF-8. That has nothing to do with View.

How can I return something when using DISPLAY/DIALOG when the dialog 
is closed? Something like:

result: display/dialog [...]

Or is this only possible via a wrapper function?

Sounds like Rebgui

display returns the layout ...

Or  maybe

catch [display/dialog "test" [button "button" [hide-popup]] throw 
"result"]
which is equivalent to a wrapper function I guess

btiffin, why would you need the catch and throw there?

I solved it now by writing a function that collects and returns the 
result. And this function contains the DIALOG stuff.

Sorry, this was an attempt to get round the none returned when the 
sysclose is used ... did I go overboard?  could be

what i meant was, why not just do [ display ... "result"] ?

Yep.  Pull head out; breathe.  ;)

Does anyone know how to adjust the saturation of a single RGB value?

Chris Ross-Gill might know. He's done a number of color adjustment 
bits.

It's interesting that I can find tens of places with getting the 
saturation of an RGB value, but not the other way around. I must 
be asking the wrong question.

Henrik - the only thing I do remember from View 1.3 dev times is 
addition of rgb-to-hsv and hasv-to-rgb functions.....

yes. They appear not to be present in R3.

(which is kind of fortunate, because I spent the whole day building 
them :-))

IIRC, there was first a source version from Chris, then it was added 
as a native ...

http://www.ross-gill.com/r/hsv-lab.r

It's not exactly equivalent, rgb-hsv returns a block.  It's also 
a little slower...


[hue [integer!] saturation [decimal!] brightness [decimal!] alpha 
[decimal!]]

Hmm, also in the library:

http://www.rebol.org/view-script.r?script=hsv-lab.r

Is there a way to get an index # from a text list selection?

text-list

face/text gives the string but can I get its position i the list?

actually its face/picked gives teh string..

index? find face/data face/picked

text-list in R2 has this problem cause it works on text value, not 
index. So it can't handle the same text value several times.
VID 3.4 actually return the index AFAIK.

Thaks Chris, I thought there might be an internal method but as DIdC 
suggests there is not/

Henrik, the hsv2rgb function, I made for Canvas RPaint. It takes 
H S V values as decimals in the area 0.0 - 1.0 as input:

hsv2rgb: func [
	H S V
	/local
		RGB
		var_h var_i
		var_1 var_2 var_3
		var_r var_g var_b
][
	RGB: 0.0.0
	either S = 0		;HSV values: 0 Ö 1
	[
		RGB/1: to-integer V * 255
		RGB/2: to-integer V * 255
		RGB/3: to-integer V * 255
	][
		var_h: H * 6
		if var_h >= 6 [var_h: 0]		;H must be < 1
		var_i: to-integer var_h
		var_1: V * (1 - S)
		var_2: V * (1 - (S * (var_h - var_i)))
		var_3: V * (1 - (S * (1 - (var_h - var_i))))
	
		switch var_i [
			0 [var_r: V			var_g: var_3	var_b: var_1]
			1 [var_r: var_2		var_g: V		var_b: var_1]
			2 [var_r: var_1		var_g: V		var_b: var_3]
			3 [var_r: var_1		var_g: var_2	var_b: V	]
			4 [var_r: var_3		var_g: var_1	var_b: V	]
			5 [var_r: V			var_g: var_1	var_b: var_2]
		]
	
		RGB/1: to-integer var_r * 255		;RGB results: 0 Ö 255
		RGB/2: to-integer var_g * 255
		RGB/3: to-integer var_b * 255
	]
	RGB
]

Geomol, thanks

Let me know, if you need the rgb2hsv as well.

I'll be ok, I think. Right now I'm trying to find a bug in an hsl-to-rgb 
function.

and now fixed :-)

Is there a way to have an area style that auto adjusts the height 
given a specific width so an entire paragraph will fit in the area. 
I know text style does this but I need to retain formatting.

I played with the sizing- 100x-1 etc. but it does not seem to work 
like 'btn style does.

Never Mind. I found the as-is statement added to style. Retains the 
formatting.

amacleod, you may want to study BTN's INIT block, to see how it uses 
the -1 size.