DELPHI AREA Forum

Hi, I have little problem with SysImageList, concretly with drawning icons. The problem is that icon is placed on non-transparent white square and no settings about drawning style, or bk color can change it. maybe screen will show it:

Probably you set the DrawingStyle property of TSysImageList to dsNormal. It should be dsTransparent.

it is dsTransparent by Default.. i tried to change blend and bk color to cl none but that doesn't help...

It could not be because of TSysImageList, because the component just set the image list handle, and doesn't override the base class methods.

Are you using a third party XP Theme Manager?

Well i do use ThemeManager from Delphi Germs, but when i removed it (completly, so there are no even single call or unit left knowing 'bout existence of it) and problem still exist...

Is the drawing okay when you use TImageList instead of TSysImageList?

Icons & bitmaps works fine, but i didn't tried 32 bits icons. i try later, more sets but it seems that this problem is hard to solve...

Hi,

Suddenly today I encountered to the same problem in my own application.

The controls use either ImageList_Draw or ImageList_DrawEx API function to draw an imagelist image on their device context. The controls that using the second API, have problem with image transparency.

ImageList_DrawEx API as one of its parameters needs the background color, and imagelist provides a value for this parameter by BkColor property. To have a transparent image, the BkColor property must be clNone.

To resolve the problem in SysImageList, I changed the default value of BkColor property to clNone.

The update is available to download.

Cheers,
Kambiz

heh... i didn't thinked that it was it... i've got same problem with api functions when i tried to make nice gray out effect and hotlight efect on images... damn.. if i had just hard line connection to internet on my home computer... it would be great. thanks a lot Kambiz