+// Sometimes CalcMin can result in some rows or cols having too much space in
+// them because as it traverses the items it makes some assumptions when
+// items span to other cells. But those assumptions can become invalid later
+// on when other items are fitted into the same rows or columns that the
+// spanning item occupies. This method tries to find those situations and
+// fixes them.
+void wxGridBagSizer::AdjustForOverflow()
+{
+ int row, col;
+
+ for (row=0; row<(int)m_rowHeights.GetCount(); row++)
+ {
+ int rowExtra=INT_MAX;
+ int rowHeight = m_rowHeights[row];
+ for (col=0; col<(int)m_colWidths.GetCount(); col++)
+ {
+ wxGBPosition pos(row,col);
+ wxGBSizerItem* item = FindItemAtPosition(pos);
+ if ( !item || !item->IsShown() )
+ continue;
+
+ int endrow, endcol;
+ item->GetEndPos(endrow, endcol);
+
+ // If the item starts in this position and doesn't span rows, then
+ // just look at the whole item height
+ if ( item->GetPos() == pos && endrow == row )
+ {
+ int itemHeight = item->CalcMin().GetHeight();
+ rowExtra = wxMin(rowExtra, rowHeight - itemHeight);
+ continue;
+ }
+
+ // Otherwise, only look at spanning items if they end on this row
+ if ( endrow == row )
+ {
+ // first deduct the portions of the item that are on prior rows
+ int itemHeight = item->CalcMin().GetHeight();
+ for (int r=item->GetPos().GetRow(); r<row; r++)
+ itemHeight -= (m_rowHeights[r] + GetHGap());
+
+ if ( itemHeight < 0 )
+ itemHeight = 0;
+
+ // and check how much is left
+ rowExtra = wxMin(rowExtra, rowHeight - itemHeight);
+ }
+ }
+ if ( rowExtra && rowExtra != INT_MAX )
+ m_rowHeights[row] -= rowExtra;
+ }
+
+ // Now do the same thing for columns
+ for (col=0; col<(int)m_colWidths.GetCount(); col++)
+ {
+ int colExtra=INT_MAX;
+ int colWidth = m_colWidths[col];
+ for (row=0; row<(int)m_rowHeights.GetCount(); row++)
+ {
+ wxGBPosition pos(row,col);
+ wxGBSizerItem* item = FindItemAtPosition(pos);
+ if ( !item || !item->IsShown() )
+ continue;
+
+ int endrow, endcol;
+ item->GetEndPos(endrow, endcol);
+
+ if ( item->GetPos() == pos && endcol == col )
+ {
+ int itemWidth = item->CalcMin().GetWidth();
+ colExtra = wxMin(colExtra, colWidth - itemWidth);
+ continue;
+ }
+
+ if ( endcol == col )
+ {
+ int itemWidth = item->CalcMin().GetWidth();
+ for (int c=item->GetPos().GetCol(); c<col; c++)
+ itemWidth -= (m_colWidths[c] + GetVGap());
+
+ if ( itemWidth < 0 )
+ itemWidth = 0;
+
+ colExtra = wxMin(colExtra, colWidth - itemWidth);
+ }
+ }
+ if ( colExtra && colExtra != INT_MAX )
+ m_colWidths[col] -= colExtra;
+ }
+
+
+}
projects / wxWidgets.git / blobdiff