World: r3wp

when I was doing an art project, I had to create a printout for a 
36 inch wide image... the file was an 508 mb, 300 dpi image.

normal printing, uses vectorial information, so the convertion from 
shapes to points (rasterization) is done directly at print time.

using anti-aliased images you can lower the resolution  without it 
looking too bad... cause the edge will gray out instead of being 
jagged blocks.  but they will look fuzzy instead.

for printing from REBOL, the best thing is to use one of the variations 
of the PDF dialects out there and printing that out.  there are a 
few guys around here who have some experience doing this.

I was using a print method calling MS image viewer transparently 
to print without opening up but I as adivised to keep my image at 
612x792 to keep it on one page...how do increase 5x  now?

you need to set the dpi of the printout to a higher value.  I don't 
know about that solution, but either it supports the dpi value of 
the input image, when it has one, or you should be able to set it 
directly.

612 / 72 = 8.5  ;-)  so your values are standard video dpis

photoshop allows you to change the meta information about dpi without 
resizing the image... I don't know if there are little tools which 
you can run command-line that will do it too.

I played around with it...
AGG looks great on screen but prints fuzzy like you said...
Increasing resolution looks sharp on printout...

I do not know if I should spend time playing with scaling or just 
biting the bullet and converting output to HTML or pdf ...I had planned 
on it anyway but as usual what I thought would be a quick one or 
two day project turns into a week to make it "right"...

But always an opportunity to learn new stuff!

Thanks for the help Maxim.

the pdf conversion should actually be pretty easy.  look it up. pdf 
maker supports images, vector art... and its a dialect IIRC so it 
should be a big thing to go from your view layout to this other dialect.

with R3, someone is bound to make a client for the windows printing 
engine  :-)

amacleod, it's VID to PS and it works fairly OK. I've used it for 
printing some statistics tables.

http://rebol.hmkdesign.dk/files/to-postscript.r

Oops, View, not VID. It only depends on faces, not the VID dialect.

also it doesn't output postscript directly, but dialect words for 
Geomol's postscript.r dialect.

doesn't support bitmaps yet (have only used it for printing text), 
but you use it like to-image.

http://rebol.hmkdesign.dk/files/vid-postscript2.png

Is this a VID bug??

>> view layout [ led 20x20 ]
>> view layout [ led 20x20 [] ]

In the first case the led can not be switched using the mouse, but 
by adding the action block it can !

Hard to say it's a bug because there never was any documentation 
on the LED face

RE: printing vid faces by converting them to images for document 
printing...


I found that a multiplier of 3 is sufficient for good quality text...maybe 
5x for super quality

I'd say it's a bug Graham.

That means we can now write the documentation :)

what's the current bug tracker for R2 ?

Still RAMBO AFAIK. Unless they've moved things to CureCode.

hard to find stuff on rebol.net  now ....

ok, submitted

graham, might as well add it to my tracker too.

should ask Carl for a copy of the VID related bug reports so that 
you can fix them in vidext :)

that would be cool

How do you force a window to the front?  setting the activate flag 
and show doesn't seem to work

Anyway to set the Z order of windows once they are already up?

by forcing it to front, do you mean modal or just moving any window 
to front? (The kit has a simple function for the last bit)

Any window ...

What I want to do is keep a separate menu window open so that no 
matter what other windows are open, the menu window stays on top.

top-most example: http://pastebin.ca/1718241

I use the Windows API to do it Graham, but I don't have a cross-platform 
solution.

Inside a view window, you can remove the face from the pane and append 
it again, so it's a the top of the z-order. I can't remember trying 
that with screen-face though.

Thanks I'll give it a go.

I want to make a program that zooms in on a picture while I hold 
down the left mouse button and that zooms out when I hold down the 
right mouse button. Any ideas?

detect on mouse down and stop zooming on mouse up

Thanks Henrik

hmm... well, I guess you need to keep that going, while the button 
is held down, otherwise no events are fired.

Yeah, that's the problem.

Could I flick over to event detection every tenth of a second somehow?

yes, you can ... well, but I am not much experienced in that. You 
need to test event/type for 'time value. But how to get time events 
there? Maybe setting face/rate: desired-value-per-second could help?

I'll try that

Here's a prototype

window: layout [i: image rate 5 load %gtfo.jpg key escape [halt]]

zoom-in: does [i/size: i/size * 5 / 4]
zoom-out: does [i/size: i/size * 4 / 5]
down: false
alt-down: false

insert-event-func [
	probe event/type
	switch/all event/type [
		down [down: true]
		up [down: false]
		time [if down [zoom-in]]		
		alt-down [alt-down: true]
		alt-up [alt-down: false]
		time [if down [zoom-in] if alt-down [zoom-out]]
	]
	center-face i
	show window
	event
]

view/options window [resize]

REBOL []


window: layout [i: image rate 5 load http://rebol.com/graphics/kits.jpg
key escape [halt]]

zoom-in: does [i/size: i/size * 5 / 4]
zoom-out: does [i/size: i/size * 4 / 5]
down: false
alt-down: false

insert-event-func [
	probe event/type
	switch/all event/type [
		down [down: true]
		up [down: false]
		time [if down [zoom-in]]		
		alt-down [alt-down: true]
		alt-up [alt-down: false]
		time [if down [zoom-in] if alt-down [zoom-out]]
	]
	center-face i
	show window
	event
]

view/options window [resize]