Since this example is about using nonstandard colors, using the
standard colors
"yellow" and "aqua" does not make much sense.
Should we just drop the entire section "Non-Standard Colors", or
confine it to mentioning hex
values only? From my (perhaps naive) view, hex is the best way to
specify color, standard or
otherwise. "iceblue" looks blue to me, but nothing like ice.
On Nov 18, 2008, at 3:43 PM, P T Withington wrote:
See my comment on the bug you just filed.
Lets stop using the non-standard names from base/colors.lzx
altogether. They are bogus. For this example, how about just using
`yellow` and `aqua`.
Sorry this is such a mess.
On 2008-11-18, at 14:31EST, J Crowley wrote:
Hrmm, including base/colors.lzx doesn't get this to work in DHTML.
I filed a bug on this, but Andre said (in http://www.openlaszlo.org/pipermail/laszlo-dev/2008-November/018145.html
) it could be fixed by including base/colors.lzx, but that doesn't
seem to work... Any ideas?
P T Withington wrote:
I appended our email as a comment.
On 2008-11-18, at 12:33EST, Lou Iorio wrote:
I see there is a JIRA for this and Josh owns it.
http://www.openlaszlo.org/jira/browse/LPP-7194
On Nov 18, 2008, at 7:42 AM, Lou Iorio wrote:
So in this broken example in the dguide (I think Josh is working
on it, but
I want to make sure I understand):
<canvas debug="true">
<simplelayout axis="x" spacing="10"/>
<class name="box1" width="100" height="100" bgcolor="$
{global['gold4']}"/>
<class name="box2" width="100" height="100" bgcolor="$
{iceblue1}"/>
<box1 id="sun">
<text text="Sun"/>
</box1>
<box2 id="mystic">
<text fgcolor="0xFFFFFF" text="Mystic"/>
</box2>
</canvas>
You need to change the class tags:
<class name="box1" width="100" height="100" bgcolor="gold4"/>
<class name="box2" width="100" height="100" bgcolor="iceblue1"/>
But this only works because the debugger is on, and that
includes the extra colors.
If you turn the debugger off, the example displays the wrong
colors. You then need
to add this:
<include href="base/colors.lzx"/>
for the example to work.
I don't see a JIRA for this. If I'm correct, I'll file a JIRA
and fix the example and
the paragraph that introduces it.
On Nov 16, 2008, at 10:11 AM, P T Withington wrote:
Probably so.
Amusingly, for your little example that we worked on, since it
includes a slider, you get all those colors. I think if you
include _any_ component, you get all the extra colors, but if
you just try to use one of those extra colors on a plain view,
you will lose (unless you happen to be in debug mode, in which
case the debugger will have included them for you). Messy.
On 2008-11-16, at 07:05EST, Lou Iorio wrote:
On Nov 15, 2008, at 6:52 PM, P T Withington wrote:
If you load base/colors.lzx, it defines a whole bunch of
colors (adds them to lz.colors). Once that is loaded, you
can, in fact, specify colors using those names.
Ah, thanks, I didn't know that. Perhaps I should add that to
the dguide?
André has pointed out that when you turn debugging on in swf8
or 9, the debugger gets loaded into your app, and it happens
to load these extra colors. So, by accident, you can use
these colors in debug mode in swf8/9 (this is one of the many
problems with running the debugger in the app, which is why I
did not do it that way for dhtml, and why we have the
'console remote debug' option for swf8/9. If you run the
demo app in either dhtml or with the console debugger, you
will see only the standard CSS color names.
The upshot is, if you want a demo that uses these extended
color names, you need to make your demo include the base/
colors.lzx file.
As to the names of the colors in that file, I believe they
are psuedo-standard, they might be from emacs, who knows. I
did not create that file.
On 2008-11-15, at 04:48EST, Lou Iorio wrote:
I concede to your technical prowess. But I still contend
that what I was looking for here is the hex value.
I can't use "gray20" to specify a color in lzx, right? I'm a
bit leery of "psuedo-standards".
In addition, why is there no red20, green20 or blue20?
I'm not suggesting that you change anything, and I'm not
trying to be difficult, I'm just curious.
On Nov 14, 2008, at 7:33 PM, P T Withington wrote:
Uh, because 20% gray has a technical meaning:
rgb(256*(1-20/100),256*(1-20/100),256*(1-20/100)) or
lab(1-20/100,0,0), or hsb(0,0,20), or #333333, etc., but it
much shorter to think/say when you want a gray with a
certain brightness.
On 2008-11-14, at 18:06EST, Lou Iorio wrote:
Sure, but what do I care what someone chose to define as
20% gray? What does that even mean?
20% gray, and 80% what else? Any color where the r, g, and
b values are the same is gray. Why pick
an integer percent and name it?
As I said, I'm old; I still think in hex. (And, I still
call it 'grey'.)
On Nov 14, 2008, at 6:49 PM, P T Withington wrote:
Well, as I said in my TODO, there needs to be a way, for
a type like color, for you to say what your preferred
presentation is. Like maybe you should be allowed to say
something like 'color(rgb)' or 'color(#)' or
'color(token,#)' or something... We could get really
carried away!
I'm pretty sure gray20 is '20% gray' and a psuedo-
standard color name.
On 2008-11-14, at 17:38EST, Lou Iorio wrote:
I also noticed several "gray" colors showing up. Cute,
but I'm not sure I like it.
gray 20, for example, seems completely arbitrary. For
me, I really want to see
the hex values. But then, I'm old.
On Nov 14, 2008, at 6:31 PM, P T Withington wrote:
'data' is historical, because that was the original
application for setting/getting string versions of a
value, but now we see there are more general reasons to
do that.
Isn't it cute how 0 becomes 'black' and 0xffffff
becomes 'white'? If you are very careful, you can set
the slider to some other named colors...
Gee, it would be fun to have a 'digital' slider that
only let you pick named colors. Hm...
On 2008-11-14, at 17:10EST, Lou Iorio wrote:
I like it mucho. The example works just as I intended.
From a purely subjective point of view, I like
'present' and 'accept'.
The "Data" part seems extraneous.
Lou
On Nov 14, 2008, at 5:43 PM, P T Withington wrote:
My fixes are in. Update, rebuild and try this and
see if you like it:
<canvas>
<simplelayout spacing="5"/>
<view id="swatch" width="300" height="100" bgcolor="$
{color.value}" />
<view id="sliders">
<simplelayout />
<slider id="color" width="300" value="0" minvalue="0"
maxvalue="0xffffff" type="color" />
<text text="${color.updateData()}" />
</view>
</canvas>
`updateData` is probably not the most mnemonic name
for how to get a string representation of the
slider's value according to the type (in this case
'color'). The inverse is called `applyData`, it
takes a string representation and tries to parse it
according to the type. `presentValueAsString` /
`acceptValueFromString` seem too ponderous. Perhaps
simply `present` and `accept`? I'd appreciate your
input.
On 2008-11-14, at 09:42EST, Lou Iorio wrote:
On Nov 13, 2008, at 1:17 PM, P T Withington wrote:
Basically, using '0x000000' in CSS was a kludge,
non-standard, and probably should have been
documented as such. It will cause a deprecation
warning.
Any of the other 3 methods are standard,
acceptable, and work.
It would be fine with me if we just said that you
specified colors the same as the CSS standard.
You can specify your color as a numeric value also,
the result of a computation, it doesn't need to be
expressed as a hex constant.
I'll add this to the chapter. I'd like to include a
simple example:
<?xml version="1.0" encoding="UTF-8"?>
<canvas>
<simplelayout spacing="5"/>
<view id="swatch" width="300" height="100" bgcolor="$
{color.value}" />
<view id="sliders">
<simplelayout />
<slider id="color" width="300" value="0"
minvalue="0" maxvalue="16777215"/>
<text text="${color.value}" />
</view>
</canvas>
Is this worth including? My intent for the last
<text> tag was to print the hex equivalent
of the slider value, but I can't figure out how to
do that. I tried:
<text text="${color.value.toString(16)}" />
but that doesn't work. Any ideas? Better example?
Thanks,
Lou
On 2008-11-13, at 08:49EST, Lou Iorio wrote:
The text preceding Example 20.3. Coloring text
using CSS seems to completely contradict what the
example shows.
The text says:
OpenLaszlo enables coloring in four ways:
0x000000, #000000, rgb(0,0,0), and "black". For
now, the best reason to prefer to use the hex
style 0x000000 is that it always works, whether
the color is assigned explicitly within the view,
or by stylesheet. Color assignment by stylesheet
fails by name, #hex, or rgb(). Explicit color
assignment by rgb() fails unless the RGB values
are all numerals -- that is, rgb(0,0,0) produces
black, but rgb(FF,FF,FF), which should produce
white, comes back at compile time as an invalid
color.
Coloring of text with fgcolor="foo" is enabled in
the same fashions, but with the same limitations.
CSS spits out an error if you use 0x000000. How
about:
OpenLaszlo enables coloring in four ways:
0x000000, #000000, rgb(0,0,0), and "black". Using
the format 0x000000 only works for explicit
assignment; it does not work in CSS. Color
assignment using rgb() must be specified with
decimal values from 0 - 255.
Coloring of text with fgcolor="foo" is enabled in
the same fashions, but with the same limitations.
In addition, the title of the example, "Coloring
text using CSS", might be better if changed to
"Applying color explictly and with CSS" since it
shows coloring views as well as text.
If you agree (or have a better idea), I'll make
the changes.
Lou
