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refresh the item being collapsed when using comctl32.dll v6 as otherwise parts of its selection rectangle may be left on screen

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@49478 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2007-10-26 23:24:06 +00:00
parent 9534d0dfdc
commit 5188000b1d
1 changed files with 30 additions and 7 deletions
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37
src/msw/treectrl.cpp
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@ -2859,17 +2859,40 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
break;
case TVN_ITEMEXPANDED:
// the item is not refreshed properly after expansion when it has
// an image depending on the expanded/collapsed state - bug in
// comctl32.dll or our code?
{
NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
wxTreeItemId id(tv->itemNew.hItem);
const wxTreeItemId id(tv->itemNew.hItem);
int image = GetItemImage(id, wxTreeItemIcon_Expanded);
if ( image != -1 )
if ( tv->action == TVE_COLLAPSE )
{
RefreshItem(id);
if ( wxApp::GetComCtl32Version() >= 600 )
{
// for some reason the item selection rectangle depends
// on whether it is expanded or collapsed (at least
// with comctl32.dll v6): it is wider (by 3 pixels) in
// the expanded state, so when the item collapses and
// then is deselected the rightmost 3 pixels of the
// previously drawn selection are left on the screen
//
// it's not clear if it's a bug in comctl32.dll or in
// our code (because it does not happen in Explorer but
// OTOH we don't do anything which could result in this
// AFAICS) but we do need to work around it to avoid
// ugly artifacts
RefreshItem(id);
}
}
else // expand
{
// the item is also not refreshed properly after expansion when
// it has an image depending on the expanded/collapsed state:
// again, it's not clear if the bug is in comctl32.dll or our
// code...
int image = GetItemImage(id, wxTreeItemIcon_Expanded);
if ( image != -1 )
{
RefreshItem(id);
}
}
}
break;