private void MeasureCell(GridLayoutInfo layoutInfo, GridLayoutStateInfo stateInfo,
ColumnAutoSizeMode autoSizeMode, GridRow row, GridCell cell)
{
if (cell.NeedsMeasured || NeedsMeasured || row.NeedsMeasured)
{
int rowHeight = row.GetRowHeight();
if (rowHeight > 0)
{
Size size = new Size(Width, rowHeight);
if (autoSizeMode != ColumnAutoSizeMode.None)
{
cell.Measure(layoutInfo, stateInfo, Size.Empty);
size.Width = cell.Size.Width;
size.Width += GetColumnIndent(stateInfo.IndentLevel);
}
else
{
cell.Measure(layoutInfo, stateInfo, size);
}
cell.Size = size;
}
else
{
Size size = Size.Empty;
if (autoSizeMode == ColumnAutoSizeMode.None)
{
size.Width = Width;
size.Width -= GetColumnIndent(stateInfo.IndentLevel);
size.Width = Math.Max(1, size.Width);
}
cell.Measure(layoutInfo, stateInfo, new Size(size.Width, 0));
if (autoSizeMode != ColumnAutoSizeMode.None)
{
size = cell.Size;
size.Width += GetColumnIndent(stateInfo.IndentLevel);
cell.Size = size;
}
else
{
size = cell.Size;
size.Width = Width;
cell.Size = size;
}
}
cell.CellSize = cell.Size;
}
}
private int GetVirtualColumnWidthEx(GridLayoutInfo layoutInfo,
GridLayoutStateInfo stateInfo, ColumnAutoSizeMode autoSizeMode, ref int height)
{
GridPanel panel = GridPanel;
int start = panel.FirstOnScreenRowIndex;
int end = panel.LastOnScreenRowIndex;
int width = 0;
for (int i = start; i <= end; i++)
{
GridRow row = panel.VirtualRows[i];
if (ColumnIndex < row.GridPanel.Columns.Count)
{
if (ColumnIndex < row.Cells.Count)
{
GridCell cell = row.Cells[ColumnIndex];
MeasureCell(layoutInfo, stateInfo, autoSizeMode, row, cell);
width = Math.Max(width, cell.CellSize.Width);
height += cell.Size.Height;
}
else
{
width = Math.Max(width, Width);
}
}
}
return (width);
}
private int GetColumnWidthEx(GridLayoutInfo layoutInfo,
GridLayoutStateInfo stateInfo, ColumnAutoSizeMode autoSizeMode,
IEnumerable<GridElement> items, int maxHeight, ref int height)
{
int width = 0;
foreach (GridElement item in items)
{
GridRow row = item as GridRow;
if (row != null && row.Visible == true)
{
if (ColumnIndex < row.GridPanel.Columns.Count)
{
if (ColumnIndex < row.Cells.Count)
{
GridCell cell = row.Cells[ColumnIndex];
if (maxHeight <= 0 || height < maxHeight)
{
MeasureCell(layoutInfo, stateInfo, autoSizeMode, row, cell);
width = Math.Max(width, cell.CellSize.Width);
height += cell.Size.Height;
}
else
{
cell.NeedsMeasured = true;
}
}
else
{
width = Math.Max(width, Width);
}
}
if (row.Rows != null && row.Expanded == true)
{
GridLayoutStateInfo itemStateInfo = new
GridLayoutStateInfo(stateInfo.GridPanel, stateInfo.IndentLevel + 1);
width = GetColumnWidth(layoutInfo, itemStateInfo,
autoSizeMode, row.Rows, width, maxHeight, ref height);
}
}
else
{
if (item is GridGroup)
{
int n = GetColumnWidthEx(layoutInfo, stateInfo,
autoSizeMode, ((GridGroup) item).Rows, maxHeight, ref height);
width = Math.Max(width, n);
}
}
}
return (width);
}
private int GetColumnWidth(GridLayoutInfo layoutInfo,
GridLayoutStateInfo stateInfo, ColumnAutoSizeMode autoSizeMode,
IEnumerable<GridElement> items, int width, int maxHeight, ref int height)
{
GridPanel panel = GridPanel;
if (panel != null)
{
if (panel.VirtualMode == true)
{
if (panel.VirtualRowCount > 0)
{
int n = GetVirtualColumnWidthEx(layoutInfo,
stateInfo, autoSizeMode, ref height);
width = Math.Max(width, n);
}
}
else
{
int n = GetColumnWidthEx(layoutInfo,
stateInfo, autoSizeMode, items, maxHeight, ref height);
width = Math.Max(width, n);
}
}
return (width);
}
