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Partial transparency help

 
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Trow
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PostPosted: Sun Sep 16, 2007 5:38 am    Post subject: Partial transparency help Reply with quote
Does anyone have the code in any language which makes a control (or a form, same thing) have different transparency values on different places of the control with a single hwnd?

the screenshot is edited to demonstrate the effect

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transparent.png

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HomerSexual
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PostPosted: Sun Sep 16, 2007 6:51 am    Post subject: Reply with quote
its looks to me like you could make a hdc for that section and then it would be on the same hwnd?

If your familiar with BitBlt you should know about dcs
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zart
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PostPosted: Sun Sep 16, 2007 8:10 am    Post subject: Reply with quote
http://www.geekpedia.com/tutorial105_Transparent-forms-(form-opacity).html

damn google owns
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Trow
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PostPosted: Sun Sep 16, 2007 8:27 am    Post subject: Reply with quote
Re blankrider: reasonable suggestion Very Happy I've never thought of GDI before. will look into it

Re zart: SetLayeredWindowAttributes, .Opacity and .TransparencyKey in .NET either:

    - cannot make only some portions of the form transparent, or
    - cannot make the selected portion transparent to some values, e.g. 50% or 127.


but the TransparencyKey is really tempting ><
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zart
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PostPosted: Sun Sep 16, 2007 9:05 am    Post subject: Reply with quote
blland wrote:


Re zart: SetLayeredWindowAttributes, .Opacity and .TransparencyKey in .NET either:

    - cannot make only some portions of the form transparent, or
    - cannot make the selected portion transparent to some values, e.g. 50% or 127.



You asked for it in any language, not for .NET - if you need something for a specific language - you should say that.
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atom0s
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PostPosted: Sun Sep 16, 2007 10:32 am    Post subject: Reply with quote
You can use:
- SetWindowLong
- GetWindowLong
- SetLayeredWindowAttributes

Which should work in any language.
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Programmer
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PostPosted: Sun Sep 16, 2007 11:35 am    Post subject: Reply with quote
http://noz3001.wordpress.com/2007/03/05/getting-alphablend-working/
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Trow
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PostPosted: Sun Sep 16, 2007 3:58 pm    Post subject: Reply with quote
zart wrote:
blland wrote:


Re zart: SetLayeredWindowAttributes, .Opacity and .TransparencyKey in .NET either:

    - cannot make only some portions of the form transparent, or
    - cannot make the selected portion transparent to some values, e.g. 50% or 127.



You asked for it in any language, not for .NET - if you need something for a specific language - you should say that.


but none of those options work for any of the languages even in any language (lol this sounds funny, but it should make sense) thanks anyway. Cool
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assaf84
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PostPosted: Mon Sep 17, 2007 8:39 am    Post subject: Reply with quote
There is a part in Noz3001's blog that gives an example.
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zart
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PostPosted: Mon Sep 17, 2007 8:47 am    Post subject: Reply with quote
blland wrote:
zart wrote:
blland wrote:


Re zart: SetLayeredWindowAttributes, .Opacity and .TransparencyKey in .NET either:

    - cannot make only some portions of the form transparent, or
    - cannot make the selected portion transparent to some values, e.g. 50% or 127.



You asked for it in any language, not for .NET - if you need something for a specific language - you should say that.


but none of those options work for any of the languages even in any language (lol this sounds funny, but it should make sense) thanks anyway. Cool


Works fine in C# - which is what the example was made for Wink
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Trow
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PostPosted: Mon Sep 17, 2007 8:48 am    Post subject: Reply with quote
http://noz3001.wordpress.com/2007/03/05/getting-alphablend-working/

this?
if you mean this, then it uses SetLayeredWindowAttributes as well, just in capital letters (unless i'm wrong about this one)
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