Treeview OverlayImage

[Thomas Noelker]

Hi there,
I'm lost here with this and hope I can get help from the experts.
I try to change treeview images with the overlay image feature but
it don't work for me.

Here's a code snippet.
'## some initializiations
hImage = ImageList_Create(16, 16, %ILC_COLOR4, 4, 0)
ImageList_Add hImage, LoadImage(hInst, "cfldr", %IMAGE_BITMAP, 0, 0, %LR_DEFAULTSIZE), 0 'index 0
ImageList_Add hImage, LoadImage(hInst, "ofldr", %IMAGE_BITMAP, 0, 0, %LR_DEFAULTSIZE), 0 'index 1
ImageList_Add hImage, LoadImage(hInst, "file", %IMAGE_BITMAP, 0, 0, %LR_DEFAULTSIZE), 0 'index 2
ImageList_Add hImage, LoadImage(hInst, "sfull", %IMAGE_BITMAP, 0, 0, %LR_DEFAULTSIZE), 0 'index 3

ImageList_SetOverlayImage hImage, 3, 1
SendMessage hTree, %TVM_SETIMAGELIST, %TVSIL_NORMAL, hImage

'## try to set the overlay image here
pItem.hItem = TreeView_GetSelection(hTree)
pItem.mask = %TVIF_HANDLE OR %TVIF_STATE
pItem.statemask = %TVIS_OVERLAYMASK
pItem.state = INDEXTOOVERLAYMASK(1)
TreeView_SetItem hTree, pItem

Images are all in the resource as well so thats not the problem. As you
can see I select the 4(3) Image from the Image list as an overlay
image and set it to overlaymask 1.
Oh, this is PBDLL 6.0 I'm working with.

Any comments will help
Many thanks ahead.
Thomas Noelker


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[Paul Noble]

Thomas,

Until one of the experts swings by, the problem may be due to the imagelist creation call

  hImage = ImageList_Create(16, 16, %ILC_COLOR4, 4, 0)

- your final parameter specifies that the imagelist isn't allowed to grow, which it will
need to do, to accommodate the overlay image. Try -

  hImage = ImageList_Create(16, 16, %ILC_COLOR4, 4, %TRUE)

See if that does it. I've not used overlay images, and can't stop to test this at the
moment. Good luck !

Paul


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[Thomas Noelker]

Paul,
thanks for your help but thats not it. I figured out that when
ever overlay images are needed that the image list needs to be
initialized with the %ILC_MASK flag too and in addition each image
should have a mask to be drawn correctly. But not just that. The
images that are needed as overlay images need to be added via
ImageList_AddMasked hImage, <img>, RGB(255, 255, 255)
Only then it works setting overlay images with INDEXTOOVERLAYMASK bla bla.
This took me now almost a week - hell.
Your comment gave me an idea to look in the right spot.

Thank you anyways
Thomas


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