World: r3wp

view layout [box effect [draw [pen red line-width 5 line 0x0 100x100]] 
"hello"]

That shows the red line drawn behind the face/text, "hello".

I got it working...

I do not know what i was doing before but its doing what I need...Thanks

Ok, no problem.

Maybe you were inserting in the draw block instead of appending (insert 
tail) !?

Actually I  don't like this behavior...its too complicated to remove 
it again.Back to my original plan of moving and resizing a box form 
face to face...

view layout [
	bx: box 100.100.255 0x0

 b: box effect [draw [pen red fill-pen red line-width 2 shape [line 
 0x0 40x0 40x40 0x40]]]
	at 40x40 text "Hello World"

  btn "append draw" [append b/effect/draw compose ['pen green 'fill-pen 
  green 'shape ['line 5x0 30x5 5x25 0x20]]show b]
	btn "Moving box" [bx/offset: 20x20 bx/size: 90x90 show bx]
	]
for example.


Now if I draw the box after the face it covers the textt which I 
want to avoid too.view layout [
	bx: box 100.100.255 0x0

 b: box effect [draw [pen red fill-pen red line-width 2 shape [line 
 0x0 40x0 40x40 0x40]]]
	at 40x40 text "Hello World"

  btn "append draw" [append b/effect/draw compose ['pen green 'fill-pen 
  green 'shape ['line 5x0 30x5 5x25 0x20]]show b]
	btn "Moving box" [bx/offset: 20x20 bx/size: 90x90 show bx]

Can you use alpha channel in vid or only in draw?

DidC, I thought about that but I was appending. I think I was not 
drawing the box properly.

Above code : ignore the second code example. I hit ctrl-v instead 
of cntrl-s

If you want to process face/text rendered text, then you're going 
to have to put a (semi-transparent) face on top of it (or in its 
pane).

; in its pane

view layout [h1 "hello" with [pane: make face [offset: 5x5 size: 
20x10 effect: [merge luma 90] edge: none]]]

This will affect how events are handled, unfortunately. As far as 
I know, there is no way to make a face "event transparent" at this 
time. I spent a lot of time looking at this already.

Got it!
I draw a box with 0 size at the end of the panel:
bx: box 0x0 edge [color: red size: 2x2]

Then I size it , move it to where I need it , and append an effect: 
		bx/offset: face/offset + khead - 0x3
		bx/size: as-pair (ktail/x - khead/x) 21
		bx/effect: append [merge][multiply 100.0.0]

Works great. I'm using it to highlight a search word as I step through 
all the text faces in a panel.

Thanks for the help...

Are you doing the APPEND more than once ? (the block will grow and 
grow...)

You only need to set the effect once.

bx: box edge [color: red size: 2x2] with [show?: false]

then you only need to set the offset and size. The above also shows 
how to make the face initially invisible. (An alternative to size: 
0x0).

SHow? false...good idea!

I've abandoned the append draw  idea as it would take some parsing 
code to remove it again when I move to the next face...
Moving a box around is alot easier.

Oh...You mean the effect append...Yeah I've been appending every 
time I do the search. But I probed bx/effect but it does not look 
like its growing unless i"m only seeing the tail in the probe

I got an out of memory crash before that I've been trying to track 
down. This might be it.

probe on head bx/effect but I only get a single occurance of the 
effect block. But teh code looks like it would do what you suggest.

got rid of the append function and just used teh effect on hte creationof 
the box...no reason to append it.
Good eye Anton, thanks

No problem.

Are there any demo's that show the manipulation of AGG graphics within 
a GUI?  For example, dragging points of a bezier curve to reshape 
the line etc?  I thought I saw some from either Cypher or the AGG 
demos done by others.  Can anyone point me to them?

I'd like to see if I can't create a very small, very simple example 
of a vector drawing program... but would need some place to start 
as at the moment, I don't have a clue.

I remember something too Brock, but can't find it now either.

Thanks for trying to find something.  Maybe it will show up in the 
next few days.

Brock:

do http://anton.wildit.net.au/rebol/gfx/demo-intersection-point-of-two-lines.r

Thanks Anton, that will be helpful.

Have looked over your code Anton.  There is alot of info I can use 
from it.  Thanks for bringing it to my attention.

do http://anton.wildit.net.au/rebol/gfx/demo-intersection-points-of-circle-and-line.r

The circle/line intersection function could be used to help connect 
lines to nodes in a graph (eg. text-boxes with rounded corners, or 
just circles), and collision detection, both things I'm thinking 
of using it for.

Excellent, as always. Anton - don't you want to "volunteer" to do 
text handling for VID3.4? As per Henrik's words, Carl's VID so far 
has only basic text handling. And so far, as for REBOL GUI in overall, 
you text area is the best ...

Thanks, Pekr. The time is not quite right for me to launch into another 
edit-panel. I want to make some improvements to the existing one 
first, to bring it to "workable/useful" status.

My non professional guess is, that your area code would need to be 
rewritten for R3 anyway ... we now have gobs, rich-text, etc. But 
your area style would be nice to have for R3 GUI. IIIRC your area 
can scroll, when you hilite text by mouse.

Pekr: not the area-scroll I see in Anton's rebsite (is this the last 
one ?)

Mine does http://www.rebol.org/view-script.r?script=area-scroll-style.r

DideC, no, not this one. See Editors group.

I don't see "editors" folder on your rebsite. But there is plenty 
of folders and scripts there !

DideC: what about Editors group here? :-)

Yes, I meant Editors group in this Altme world.

Oups ;-)

(A "Search group name" gadget is missing in this altme world :-)

my search is as follows - I change the sort order, then it is easy 
to find out, if such group exists, or not :-)

I do too. But it start being painfull :-p

Updated and renamed to intersection-points-of-line-and-circle:

load-thru/update http://anton.wildit.net.au/rebol/gfx/intersection-points-of-line-and-circle.r

do-thru/update http://anton.wildit.net.au/rebol/gfx/demo-intersection-points-of-line-and-circle.r

This should clean the old (inferior, and slightly different named) 
versions out of your cache:

site: http://anton.wildit.net.au/rebol/gfx/
old-file: %intersection-points-of-circle-and-line.r

if exists? cache-file: path-thru site/:old-file [delete cache-file]

if exists? cache-file: path-thru site/(join %demo- old-file) [delete 
cache-file]

Did we ever get a successful SVG -> DRAW shape converter?

I need a basic function to convert a monochrome SVG drawing to SHAPE.

Ask Cyphre, he has some converter.