Using a fake semi-transparency - what's really possible?

Hi,
I'm just now moving into DW CS4 (from cs3) and I'm on an intel iMac. I'm trying to make a table background that is semi-transparent while KEEPING text and photos 100% opaque. I'm already familiar with this kind of code: (just improvising here):
.tableMain {
background: transparent;
filter=alpha(opacity=50);
opacity=.5
But this makes EVERYTHING semi-transparent - content and all. I'd love to know if it is possible to keep the content fully in view.
I've tried making a semi-transparent GIF or PNG background in Photoshop CS4 and using it for the table background, but that doesn't seem to work.
I did discover this (perhaps unique to my site) solution for a fake semi-transparency: Since I've got a gradient background on my site (see www.frankbright.com/History.htm ), I took a 'Screen Snapshot' of the background, from the bottom of the navigation to as far down as I could go. Then I used PS CS4 to expand the canvas and color down to cover my long pages. (See Jazz Links)
Then I used PS levels to darken the snapshot very slightly, so as to intimate a gray semi-transparent effect. Then I simply used that snapshot as the table background.
This looks better on the long, clearer pages that have only text content. With the index3 home page, however, you don't sense the semi-transparent effect I'm going for as much.
I've also noticed the 'Extensions' area of the CSS interface in DW - does this have anything to do with what I'm trying to do?
Anyways, I'm open to ideas, if anyone could suggest any.
Many Thanks, Frank B.

Hi
You did not say what the problem was.
others viewing this thread. please read -
As for the colors of the background gradient using IEFilters, (for those who did not know on the forum, the IEFilter for background gradient was available since IE4.5, circa 1996, and all filters since IE5, circa 1998) you will need to adjust these as required. Luckily enough most background gradients go from one color to white or a lighter color of the starting color.
For FF and Safari see - http://hacks.mozilla.org/2009/11/css-gradients-firefox-36/, http://webkit.org/blog/175/introducing-css-gradients/.
Google Chrome uses the webkit declaration, but unfortunately Opera does not support the feature, (use a standard background color at the beginning of the declaration) and FF only from version 3.6. But with the upgrading for FF users normally being 70+% within 6 months, this does mean that 85% of users will support the background gradient.
PZ
Edit: If you are using a css reset then it may be worth placing the position: relative; statement in this, as these normally include all the elements from H1 to pre.
Message was edited by: pziecina

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- Looking for Drop Down menu script w/ semi-transparent backgrounds...

Looking for a dropdown menu script that will allow
semi-transparent
backgrounds (so we can partly see what the list is displaying
over).
I've Googled this to death using all the obvious keywords,
but have yet to
find what I'm looking for.
Thanks.

Yes. I understand and agree. Good point.
Thanks.
Al Sparber - PVII
http://www.projectseven.com
Extending Dreamweaver - Nav Systems | Galleries | Widgets
Authors: "42nd Street: Mastering the Art of CSS Design"
"T.Pastrana - 4Level" <[email protected]> wrote in message
news:[email protected]...
>I posted mainly for the benefit of Reese, I know you know
this.
>
>
> --
> Best Regards,
> ..Trent Pastrana
> www.fourlevel.com
>
>
>
>
>
>
> "Al Sparber- PVII" <[email protected]>
wrote in message
> news:[email protected]...
>> Actually, it's not an error. But we do happen to
have it in a CC on
>> that page because the last time I posted that page
on this forum it
>> was criticized for "failing" the W3C CSS validator.
>>
>>
http://www.projectseven.com/foxy.gif
>>
>> The Firefox console simply would report it as a
warning - not an
>> error. It would have no affect on the page. But
thanks for pointing
>> that out.
>>
>> --
>> Al Sparber - PVII
>>
http://www.projectseven.com
>> Extending Dreamweaver - Nav Systems | Galleries |
Widgets
>> Authors: "42nd Street: Mastering the Art of CSS
Design"
>>
>>
>>
>>
>> "T.Pastrana - 4Level" <[email protected]> wrote in
message
>> news:[email protected]...
>>> If you want your page to validate you might want
to separate the
>>> properties. Some modern browsers like Firefox
will throw an error
>>> with the filter property.
>>>
>>> #menu li {
>>> opacity: 0.85;
>>> }
>>>
>>> 
>>>
>>>
>>> --
>>> Best Regards,
>>> ..Trent Pastrana
>>> www.fourlevel.com
>>>
>>>
>>>
>>>
>>> "Al Sparber- PVII"
<[email protected]> wrote in message
>>> news:[email protected]...
>>>> If, for example, you are using an unordered
list for your menu, set
>>>> opacity on the LI, like so:
>>>>
>>>> #menu li {
>>>> opacity: 0.85;
>>>> filter: alpha(opacity=85);
>>>> }
>>>>
>>>> As far as I know, there are no
"off-the-shelf" menu tools of worth
>>>> that offer this as an automatic option. You
should pick yourself a
>>>> good menu system then set opacity on the
relevant element. The
>>>> menu "script" or "system" really has nothing
to do with it.
>>>>
>>>> If you need a good base menu system, you can
find free ones and
>>>> commercial ones on our site. Here is an
example of one with
>>>> transparency:
>>>>
>>>>
http://www.projectseven.com/products/menusystems/pmm/css_tweaks/opacity/
>>>>
>>>>
>>>>
>>>> --
>>>> Al Sparber - PVII
>>>>
http://www.projectseven.com
>>>> Extending Dreamweaver - Nav Systems |
Galleries | Widgets
>>>> Authors: "42nd Street: Mastering the Art of
CSS Design"
>>>>
>>>>
>>>>
>>>>
>>>> "Reese" <[email protected]> wrote in message
>>>> news:[email protected]...
>>>>> Looking for a dropdown menu script that
will allow
>>>>> semi-transparent backgrounds (so we can
partly see what the list
>>>>> is displaying over).
>>>>>
>>>>> I've Googled this to death using all the
obvious keywords, but
>>>>> have yet to find what I'm looking for.
>>>>>
>>>>> Thanks.
>>>>>
>>>>
>>>
>>>
>>
>
>

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          colorData[1] = getBaseColor().getGreen();
          colorData[2] = getBaseColor().getBlue();
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          colorData[4] = colorData[1] - 45;          // outerBorder green
          colorData[5] = colorData[2] - 35;          // outerBorder blue
          colorData[6] = colorData[0] + 30;          // innerBorder red
          colorData[7] = colorData[1] + 30;          // innerBorder green
          colorData[8] = colorData[2] + 20;          // innerBorder blue
          /* Make sure the new color data is not out of bounds: */
          for (int i = 3; i < colorData.length; i++)
               if (colorData[i] > 255)
                    colorData[i] = 255;
               else if (colorData[i] < 0)
                    colorData[i] = 0;
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          g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
          g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
          g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION,
                                        RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
          g2d.setColor(getBaseColor());
          /* Draw the main body of the component */
          if (getFullTransEnabled())
               alphaComp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.6f);
               g2d.setComposite(alphaComp);
          else
               alphaComp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1.0f);
               g2d.setComposite(alphaComp);
          g2d.fillRect(cbw, cbw, super.getWidth() - 2 * cbw, super.getHeight() - 2 * cbw);
          alphaComp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.6f);
          g2d.setComposite(alphaComp);
          /* Draw the inner border: */
          g2d.setColor(getInnerColor());
          g2d.fillRect(obw, obw, ibw, super.getHeight() - obw * 2); // left border
          g2d.fillRect(obw, obw, super.getWidth() - obw, ibw); // top border
          g2d.fillRect(super.getWidth() - cbw, obw, ibw, super.getHeight() - obw * 2); // right border
          g2d.fillRect(obw, super.getHeight() - cbw, super.getWidth() - obw * 2, ibw); // bottom border
          /* Draw the outer border: */
          g2d.setColor(getOuterColor());
          g2d.fillRect(0, 0, obw, super.getHeight()); // left border
          g2d.fillRect(0, 0, super.getWidth() + obw, obw); // top border
          g2d.fillRect(super.getWidth() - obw, 0, obw, super.getHeight()); // right border
          g2d.fillRect(0, super.getHeight() - obw, super.getWidth(), obw); // bottom border
          alphaComp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1.0f);
          g2d.setComposite(alphaComp);
          g2d.dispose();
}

I added the main method to your TransparentContainer class ...
     public static void main(String[] args) {
          JFrame f = new JFrame("test transparent container");
          f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          TransparentContainer tc = new TransparentContainer(Color.RED, true);
          JLabel label = new JLabel("Hello, World!");
          tc.add(label);
          f.getContentPane().add(tc);
          f.setSize(800, 600);
          f.setVisible(true);
     }...using the code you posted the label was not shown. I modified your paintComponent(Graphics g) method and I did this (see the areas in bold):
     /* protected void paintComponent(Graphics g)
      *   Paints the component with the borders and colors
      *   that were set up in above methods.
     protected void paintComponent(Graphics g)
          // Call super so components added to this panel are visible
          super.paintComponent(g);
          Graphics2D g2d = (Graphics2D) g;
          AlphaComposite alphaComp;
          g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
          g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
          g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION,
                                        RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
          g2d.setColor(getBaseColor());
          /* Draw the main body of the component */
          if (getFullTransEnabled())
               alphaComp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.6f);
               g2d.setComposite(alphaComp);
          else
               alphaComp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1.0f);
               g2d.setComposite(alphaComp);
          g2d.fillRect(cbw, cbw, super.getWidth() - 2 * cbw, super.getHeight() - 2 * cbw);
          alphaComp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.6f);
          g2d.setComposite(alphaComp);
          /* Draw the inner border: */
          g2d.setColor(getInnerColor());
          g2d.fillRect(obw, obw, ibw, super.getHeight() - obw * 2); // left border
          g2d.fillRect(obw, obw, super.getWidth() - obw, ibw); // top border
          g2d.fillRect(super.getWidth() - cbw, obw, ibw, super.getHeight() - obw * 2); // right border
          g2d.fillRect(obw, super.getHeight() - cbw, super.getWidth() - obw * 2, ibw); // bottom border
          /* Draw the outer border: */
          g2d.setColor(getOuterColor());
          g2d.fillRect(0, 0, obw, super.getHeight()); // left border
          g2d.fillRect(0, 0, super.getWidth() + obw, obw); // top border
          g2d.fillRect(super.getWidth() - obw, 0, obw, super.getHeight()); // right border
          g2d.fillRect(0, super.getHeight() - obw, super.getWidth(), obw); // bottom border
          alphaComp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1.0f);
          g2d.setComposite(alphaComp);
          // Do not dispose the graphics
          // g2d.dispose();
     }...seems to work fine now. Perhaps you should also add methods or additional constructors so the user can easily change the transparency level...and add some javadoc comments to your constructors ...at a first glance I did not know what fullTrans was
public TransparentContainer(Color color, boolean fullTrans)good luck!!

Problem with opaque object/text showing as semi-transparent?

I didn't start seeing this problem till today, but the past couple of times I've gone to create a new shape layer or text layer, it appears like it's at 50% opacity. I've checked my layer settings, and they're all at 100% fill and opacity. I can't see any reason why they'd be semi-transparent, and none of the settings I've tried have changed anything. I've even tried deleting the shapes/text, saving my document, and starting over. That worked one time, but this time it's not working.
Even applying a color overlay still results in a semi-transparent shape.
Anyone else have a similar issue and know how to fix it? I am in the middle of doing a design for a client, for print, and I really can't be dealing with this right now.

I ended up just deleting the group that was affected, saving it as a new file, and then rebuilding the new group from the new file. For some reason that worked. I am not currently have the problem, so I can't show you what was happening, but I'll definitely look at these steps if it happens again.
Thanks!
Brooke

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