B_TRIM_ICON_BITMAP_KEEP_ASPECT
if ((flags & (B_TRIM_ICON_BITMAP | B_TRIM_ICON_BITMAP_KEEP_ASPECT)) != 0
(flags & B_TRIM_ICON_BITMAP_KEEP_ASPECT) != 0, trimmedBitmap);
(flags & B_TRIM_ICON_BITMAP_KEEP_ASPECT) != 0,
button->SetIcon(onBM, B_TRIM_ICON_BITMAP_KEEP_ASPECT);