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Transparent non-rectangularness?

Ok experts, this has been driving me mad. I want to create a jazzy little app has a non-rectangular shape. The shape needs to come from a bitmap. Now while using CoolForm will no doubt be everybody's immediate response, there doesn't seem to be a D6 version so I can't.

The effect I'm after is exactly the same as setting the form's brush style to bsClear (and the border to none) and then having a tyransparent TImage on top. Although this works, it all goes nasty when the form gets moved.

Any ideas?

The Neil =:)
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TheNeil
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TheNeil
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1 Solution
 
TOndrejCommented:
You can use SetWindowRgn, example on http://www.gnomehome.demon.nl/uddf/pages/forms.htm#forms14
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TheNeilAuthor Commented:
TOndrej,

That's fine for eliptical windows but I want my form to use the shape of the image (with the transparency) )or a rectangle with the image inside it. It also falls over when you try to move the form - the transparency doesn't get updated

The Neil =:(
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JaymolCommented:
Hi TheNiel - I'd recommend downloading the JEDI libraries.  One of the units (I think it's jclGraphics) has a function in it something like SetWindowRGNToBitmap.  (Not too sure on the function name.)

I've used that before for similar reasons and found it to be really good.  Most of the stuff in JEDI has been fully coded so it's simple to use and covers most of the possible problems with the use of such functions.

Good luck,

John.
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TOndrejCommented:
> That's fine for eliptical windows

A region may be of any shape, e.g. polygon
As Jaymol suggested, have a look at JclGraphics.CreateRegionFromBitmap
www.delphi-jedi.org

> It also falls over when you try to move the form - the transparency doesn't get updated

That's not true. When you set a window region then anything outside of that region is simply no longer a part of the window, updating is automatic by Windows, as well as handling mouse clicks.
E.g. if you have a donut-shaped window region then your window will never see a mouse click into the hole in the middle.
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JaymolCommented:
The function name is CreateRegionFromBitmap and it's in the unit JclGraphics.

John.
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JaymolCommented:
heh
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Mohammed NasmanSoftware DeveloperCommented:
Hello

  Look at article, to how to make cool forms looking
http://delphi.about.com/library/weekly/aa120898.htm


 try TSkinForm, it's free and call, but you have to register if you want the source code
http://www.friendsoft.net/english/index.htm

also look at the forms effects in torry site
http://www.torry.net/effects.htm
http://www.torry.net/nonrect.htm

Best regards
Mohammed Nasman
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DragonSlayerCommented:
TheNeil, check this out:

http://www.informatics.no/progvareOF.htm

I've been using it to create my irregularly-shaped forms for quite some time...



DragonSlayer.
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TheNeilAuthor Commented:
Thanks everyone but Jaymol's solution works just fine so he gets the points

The Neil =:)
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JaymolCommented:
Thanks.

Glad to help.

John.
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