public static GridBox GetComputedGridBoxContainingRect(Rect rect, GridElement grid)
{
int columnBeforePosition = grid.GetComputedColumnBeforePosition(rect.Left);
int columnAfterPosition = grid.GetComputedColumnAfterPosition(rect.Right);
int rowBeforePosition = grid.GetComputedRowBeforePosition(rect.Top);
int rowAfterPosition = grid.GetComputedRowAfterPosition(rect.Bottom);
if (columnAfterPosition > columnBeforePosition + 1 && rect.Right < grid.GetComputedPositionOfColumn(columnAfterPosition - 1) + grid.GetComputedColumnWidth(columnAfterPosition - 1) / 2.0)
{
--columnAfterPosition;
}
if (columnAfterPosition > columnBeforePosition + 1 && rect.Left > grid.GetComputedPositionOfColumn(columnBeforePosition) + grid.GetComputedColumnWidth(columnBeforePosition) / 2.0)
{
++columnBeforePosition;
}
if (columnAfterPosition == columnBeforePosition + 1 && columnAfterPosition < grid.ColumnDefinitions.Count && grid.GetComputedPositionOfColumn(columnAfterPosition) < (rect.Left + rect.Right) / 2.0)
{
++columnBeforePosition;
++columnAfterPosition;
}
if (rowAfterPosition > rowBeforePosition + 1 && rect.Bottom < grid.GetComputedPositionOfRow(rowAfterPosition - 1) + grid.GetComputedRowHeight(rowAfterPosition - 1) / 2.0)
{
--rowAfterPosition;
}
if (rowAfterPosition > rowBeforePosition + 1 && rect.Top > grid.GetComputedPositionOfRow(rowBeforePosition) + grid.GetComputedRowHeight(rowBeforePosition) / 2.0)
{
++rowBeforePosition;
}
if (rowAfterPosition == rowBeforePosition + 1 && rowAfterPosition < grid.RowDefinitions.Count && grid.GetComputedPositionOfRow(rowAfterPosition) < (rect.Top + rect.Bottom) / 2.0)
{
++rowBeforePosition;
++rowAfterPosition;
}
return(new GridBox(columnBeforePosition, columnAfterPosition, rowBeforePosition, rowAfterPosition));
}
public void AddHorizontalGridline(GridElement grid, double position)
{
using (SceneEditTransaction editTransaction = grid.ViewModel.CreateEditTransaction(StringTable.UndoUnitAddGridline))
{
using (grid.ViewModel.ForceBaseValue())
{
List <LayoutCacheRecord> currentRects = this.GetCurrentRects((BaseFrameworkElement)grid);
int rowBeforePosition = grid.GetComputedRowBeforePosition(position);
double computedPositionOfRow1 = grid.GetComputedPositionOfRow(rowBeforePosition);
double computedPositionOfRow2 = grid.GetComputedPositionOfRow(rowBeforePosition + 1);
bool flag = grid.RowDefinitions.Count == 0 || grid.RowDefinitions[rowBeforePosition].Height.IsStar;
grid.CacheComputedRowHeights();
this.EnsureOneRow(grid);
grid.RowDefinitions.Insert(rowBeforePosition + 1, RowDefinitionNode.Factory.Instantiate(grid.ViewModel));
position = Math.Max(position, computedPositionOfRow1);
if (position > computedPositionOfRow2)
{
grid.ComputedRowHeightCache[rowBeforePosition] = computedPositionOfRow2 - computedPositionOfRow1;
grid.ComputedRowHeightCache.Insert(rowBeforePosition + 1, position - computedPositionOfRow2);
}
else
{
grid.ComputedRowHeightCache[rowBeforePosition] = position - computedPositionOfRow1;
grid.ComputedRowHeightCache.Insert(rowBeforePosition + 1, computedPositionOfRow2 - position);
}
editTransaction.Update();
grid.ViewModel.DefaultView.UpdateLayout();
if (flag)
{
List <int> heightStarIndices = this.GetHeightStarIndices(grid);
this.NormalizeHeightStars(grid, heightStarIndices);
}
else
{
grid.RowDefinitions[rowBeforePosition].Height = new GridLength(grid.ComputedRowHeightCache[rowBeforePosition]);
grid.RowDefinitions[rowBeforePosition].ClearValue(RowDefinitionNode.MinHeightProperty);
grid.RowDefinitions[rowBeforePosition + 1].Height = new GridLength(grid.ComputedRowHeightCache[rowBeforePosition + 1]);
grid.RowDefinitions[rowBeforePosition + 1].ClearValue(RowDefinitionNode.MinHeightProperty);
}
editTransaction.Update();
grid.ViewModel.RefreshSelection();
this.SetCurrentRects((BaseFrameworkElement)grid, currentRects);
grid.UncacheComputedRowHeights();
editTransaction.Commit();
}
}
grid.ViewModel.DefaultView.AdornerLayer.InvalidateAdornersStructure((SceneElement)grid);
}