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How to set transparency level for static rectangle? [message #909] Wed, 08 February 2006 02:22 Go to next message
fudadmin is currently offline  fudadmin
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How to set transparency level for static rectangle or other controls?

I have this code(one rect semi-covers the other):

#include <CtrlLib/CtrlLib.h>


GUI_APP_MAIN
{
	TopWindow w;
	Array<StaticRect> fr;

	fr.Add();
	fr[0].SetRect(50,50,100,100);
	fr[0].Color(SRed);
	fr.Add();
	fr[1].SetRect(100,100,100,100);
	fr[1].Color(SBlue);
		
	
	w.Add(fr[0]);
	w.Add(fr[1]);
	
	
	w.Run();
}

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Re: How to set transparency level for static rectangle? [message #912 is a reply to message #909] Wed, 08 February 2006 08:06 Go to previous messageGo to next message
mirek is currently offline  mirek
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SetColor(Null);
Transparent();

Not that "Transparent" is in fact just painting hint - in theory, all would work with this flag ON for all Ctrls. However, to avoid flickering, only Ctrls that really are transparent should have this activated.

Also, if what you need is StaticRect that is always transparent, rather use ParentCtrl.

Mirek

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Re: How to set transparency level for static rectangle? [message #913 is a reply to message #912] Wed, 08 February 2006 09:01 Go to previous messageGo to next message
fudadmin is currently offline  fudadmin
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luzr wrote on Wed, 08 February 2006 02:06

SetColor(Null);
Transparent();

Not that "Transparent" is in fact just painting hint - in theory, all would work with this flag ON for all Ctrls. However, to avoid flickering, only Ctrls that really are transparent should have this activated.

Also, if what you need is StaticRect that is always transparent, rather use ParentCtrl.

Mirek


Where is THE LEVEL? I can't see any numbers.
I want:
SetColor(SRed, alpha=50%);

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Re: How to set transparency level for static rectangle? [message #914 is a reply to message #913] Wed, 08 February 2006 09:04 Go to previous messageGo to next message
mirek is currently offline  mirek
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I see... Well, alpha-blended drawing is not supported.

You can SetAlpha for top-level Ctrl - it it will work on WinXP, but that is all for the moment.

(The problem is that alpha-blending is not supported by base platforms).

Mirek

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Re: How to set transparency level for static rectangle? [message #915 is a reply to message #909] Wed, 08 February 2006 09:12 Go to previous messageGo to next message
fudadmin is currently offline  fudadmin
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do you suggest to use primitive DC and bitblt? Smile

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Re: How to set transparency level for static rectangle? [message #916 is a reply to message #915] Wed, 08 February 2006 09:42 Go to previous messageGo to next message
mirek is currently offline  mirek
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Actually, what I suggest is that DC/BitBlt (and its X11 equivalents) do not support alpha-blending (AFAIK).

However, it is possible that I misundestood what you really need...

What kind of operation do you want to do with BitBlt?

Mirek

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Re: How to set transparency level for static rectangle? [message #997 is a reply to message #916] Mon, 13 February 2006 12:05 Go to previous messageGo to next message
fudadmin is currently offline  fudadmin
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luzr wrote on Wed, 08 February 2006 03:42

Actually, what I suggest is that DC/BitBlt (and its X11 equivalents) do not support alpha-blending (AFAIK).

However, it is possible that I misundestood what you really need...

What kind of operation do you want to do with BitBlt?

Mirek


I'd like this kind
index.php?t=getfile&id=65&private=0

also you can check more at:
http://www.blitzbasic.com/bpdocs/command_list_gui_cat.php?sh ow=HTML%20Views

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Re: How to set transparency level for static rectangle? [message #998 is a reply to message #997] Mon, 13 February 2006 12:29 Go to previous messageGo to next message
mirek is currently offline  mirek
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Well, you can have this: it is window-level alpha blending, supported by Ctrl::SetAlpha.

The only problem you have to be aware of is that unlike all other things, you can use SetAlpha just for windows that are open at the moment (this is not U++ way, perhaps I should fix that..)

Try (untested):

GUI_APP_MAIN
{
TopWindow win;
win.Open();
win.SetAlpha(100);
win.Run();
}

Another thing to know is that it does not work before Win2000 or in Linux (is NOP).

BTW, what you cannot have is alpha blending of shapes in your view area (this requires GDI+ on Win32, which is not implicit on all platforms we want to support...)

Mirek

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Re: How to set transparency level for static rectangle? [message #1083 is a reply to message #998] Sun, 19 February 2006 23:59 Go to previous messageGo to next message
fudadmin is currently offline  fudadmin
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Yes, it is working. My mistake was that I had missed win.Open().
Then, experimenting with U++ Ctrl DC's, I realised that in U++ you get hwnd after you open the window.
But now I can't believe that the semi-transparent window is soooo slow comparing to what I get with "pure" win32 API's on my 1.5 Ghz. Could you give some hints about the reason?

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Re: How to set transparency level for static rectangle? [message #1084 is a reply to message #916] Mon, 20 February 2006 00:04 Go to previous messageGo to next message
fudadmin is currently offline  fudadmin
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luzr wrote on Wed, 08 February 2006 03:42

Actually, what I suggest is that DC/BitBlt (and its X11 equivalents) do not support alpha-blending (AFAIK).

However, it is possible that I misundestood what you really need...

What kind of operation do you want to do with BitBlt?

Mirek


Actually, I want to use not only bitblt but I need hDC's for win32 api's, like SetDIBitsToDevice, StretchDIBits, AlphaBlend etc.

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Re: How to set transparency level for static rectangle? [message #1086 is a reply to message #1083] Mon, 20 February 2006 01:17 Go to previous message
fudadmin is currently offline  fudadmin
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fudadmin wrote on Sun, 19 February 2006 17:59


But now I can't believe that the semi-transparent window is soooo slow comparing to what I get with "pure" win32 API's on my 1.5 Ghz. Could you give some hints about the reason?

There was something strange... It's ok now after I recompiled.

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