+ 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;
+ }
+ }
projects / wxWidgets.git / blobdiff