Comments on: HICON to QPixmap

By: Posupulezakaj

Posupulezakaj — Tue, 12 Jan 2010 17:24:44 +0000

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By: Retrieving a file's icon - Qt Centre Forum

Retrieving a file's icon - Qt Centre Forum — Tue, 30 Oct 2007 08:19:50 +0000

[...] Re: Retrieving a file’s icon yep forgot that. i prefer this solution: http://www.methylblue.com/blog/hicon-to-qpixmap/ [...]

By: Daniel

Daniel — Thu, 15 Feb 2007 23:40:39 +0000

Yeah, I tried both alpha settings, plus messed around a bit without much success. Luckily, it seems Qt is now doing the hard work for us in Qt 4.3. Check out the new convertHIconToPixmap() function in src\gui\image\qpixmap_win.cpp from the latest Qt snapshot. It includes all the necessary craziness to detect alpha and whatnot. Not sure when Qt 4.3 will be out, but you can just copy+paste that function and use it in an older Qt 4 program.

By: Max Howell

Max Howell — Wed, 14 Feb 2007 11:02:49 +0000

Diid you try both pixmap( foo, true ) and pixmap( foo, false ), as one handles transparency and the other doesn’t. I can’t remember exactly all the details as I wrote this a while ago. I recall I had to add the bool as there was no way to detect this I could determine.

By: Daniel

Daniel — Tue, 13 Feb 2007 23:47:52 +0000

Hi,

Thanks for the post! This method works great except for one thing: for old-style icons with 1-bpp transparency, the black color goes completely transparent, giving the icons a weird “cropped” look.

For example, in Windows XP, the icon for .BAT files has a black border on the bottom and right. This border goes completely transparent at some point during the conversion to QPixmap. This is more noticeable for me, because I am using SHGFI_SMALLICON, so a sizeable chunk of some icons just goes “missing”!

Any idea how to fix it? Thanks!