-int wxListBox::DoListHitTest(const wxPoint& inpoint) const
-{
-#if wxOSX_USE_CARBON
- OSStatus err;
-
- // There are few reasons why this is complicated:
- // 1) There is no native HitTest function for Mac
- // 2) GetDataBrowserItemPartBounds only works on visible items
- // 3) We can't do it through GetDataBrowserTableView[Item]RowHeight
- // because what it returns is basically inaccurate in the context
- // of the coordinates we want here, but we use this as a guess
- // for where the first visible item lies
-
- wxPoint point = inpoint;
-
- // get column property ID (req. for call to itempartbounds)
- DataBrowserTableViewColumnID colId = 0;
- err = GetDataBrowserTableViewColumnProperty(m_peer->GetControlRef(), 0, &colId);
- wxCHECK_MSG(err == noErr, wxNOT_FOUND, wxT("Unexpected error from GetDataBrowserTableViewColumnProperty"));
-
- // OK, first we need to find the first visible item we have -
- // this will be the "low" for our binary search. There is no real
- // easy way around this, as we will need to do a SLOW linear search
- // until we find a visible item, but we can do a cheap calculation
- // via the row height to speed things up a bit
- UInt32 scrollx, scrolly;
- err = GetDataBrowserScrollPosition(m_peer->GetControlRef(), &scrollx, &scrolly);
- wxCHECK_MSG(err == noErr, wxNOT_FOUND, wxT("Unexpected error from GetDataBrowserScrollPosition"));
-
- UInt16 height;
- err = GetDataBrowserTableViewRowHeight(m_peer->GetControlRef(), &height);
- wxCHECK_MSG(err == noErr, wxNOT_FOUND, wxT("Unexpected error from GetDataBrowserTableViewRowHeight"));
-
- // these indices are 0-based, as usual, so we need to add 1 to them when
- // passing them to data browser functions which use 1-based indices
- int low = scrolly / height,
- high = GetCount() - 1;
-
- // search for the first visible item (note that the scroll guess above
- // is the low bounds of where the item might lie so we only use that as a
- // starting point - we should reach it within 1 or 2 iterations of the loop)
- while ( low <= high )
- {
- Rect bounds;
- err = GetDataBrowserItemPartBounds(
- m_peer->GetControlRef(), low + 1, colId,
- kDataBrowserPropertyEnclosingPart,
- &bounds); // note +1 to translate to Mac ID
- if ( err == noErr )
- break;
-
- // errDataBrowserItemNotFound is expected as it simply means that the
- // item is not currently visible -- but other errors are not
- wxCHECK_MSG( err == errDataBrowserItemNotFound, wxNOT_FOUND,
- wxT("Unexpected error from GetDataBrowserItemPartBounds") );
-
- low++;
- }
-
- // NOW do a binary search for where the item lies, searching low again if
- // we hit an item that isn't visible
- while ( low <= high )
- {
- int mid = (low + high) / 2;
-
- Rect bounds;
- err = GetDataBrowserItemPartBounds(
- m_peer->GetControlRef(), mid + 1, colId,
- kDataBrowserPropertyEnclosingPart,
- &bounds); //note +1 to trans to mac id
- wxCHECK_MSG( err == noErr || err == errDataBrowserItemNotFound,
- wxNOT_FOUND,
- wxT("Unexpected error from GetDataBrowserItemPartBounds") );
-
- if ( err == errDataBrowserItemNotFound )
- {
- // item not visible, attempt to find a visible one
- // search lower
- high = mid - 1;
- }
- else // visible item, do actual hitttest
- {
- // if point is within the bounds, return this item (since we assume
- // all x coords of items are equal we only test the x coord in
- // equality)
- if ((point.x >= bounds.left && point.x <= bounds.right) &&
- (point.y >= bounds.top && point.y <= bounds.bottom) )
- {
- // found!
- return mid;
- }
-
- if ( point.y < bounds.top )
- // index(bounds) greater then key(point)
- high = mid - 1;
- else
- // index(bounds) less then key(point)
- low = mid + 1;
- }
- }
-#endif
- return wxNOT_FOUND;
projects / wxWidgets.git / blobdiff