/// <summary>
/// Calculates grid width and individual column widths.
/// </summary>
public Tuple <nfloat, nfloat[]> CalculateAbsoluteColumnWidth(Grid grid)
{
var absoluteColumnWidth = new nfloat[this.ColumnDefinitions.Count()];
var visibleCols = Cells.Where(c => c.IncludeInAutoWidthSizeCalcs).Select(c => c.Position.Column).Distinct();
int numVisibleCols = visibleCols.Count();
// Calculate full height of grid
nfloat totalWidth;
var minColWidth = new nfloat[this.ColumnDefinitions.Count()];
if (grid.AutoWidth)
{
LogLine($"CalculateAbsoluteColumnWidth AutoWidth");
var maxColWidth = new nfloat[this.ColumnDefinitions.Count()];
int maxColSpan = grid.CurrentLayout.cells.Max(c => c.Position.ColumnSpan);
for (int colSpan = 1; colSpan <= maxColSpan; colSpan++)
{
for (int row = 0; row < this.RowDefinitions.Count(); row++)
{
for (int col = 0; col < this.ColumnDefinitions.Count(); col++)
{
var colDef = this.ColumnDefinitions[col];
var cell = FindCell(col, row);
if (cell == null)
{
continue;
}
if (cell.IncludeInAutoWidthSizeCalcs && cell.Position.ColumnSpan == colSpan)
{
nfloat cellWidth = colDef.SizeType == SizeType.Auto && cell.Position.Horizontal == Alignment.Stretched
? 0f
: colDef.SizeType == SizeType.Fixed
? colDef.Size
: cell.AutoSizeSize.Width;
cellWidth += cell.Position.Margin.Width();
LogLine($" {cell.Position} cellWidth={cellWidth}");
if (colSpan == 1)
{
maxColWidth[col] = NMath.Max(maxColWidth[col], cellWidth);
}
else
{
// Need to ensure the other columns we span have enough
// width to account for this spanned column.
nfloat spanWidth = 0;
for (int col2 = cell.Position.Column; col2 < cell.Position.Column + colSpan; col2++)
{
spanWidth += maxColWidth[col2];
}
if (cellWidth > spanWidth)
{
bool hasZeroColWidth = false;
for (int col2 = cell.Position.Column; col2 < cell.Position.Column + colSpan; col2++)
{
if (maxColWidth[col2] == 0)
{
hasZeroColWidth = true;
}
}
if (hasZeroColWidth)
{
// Cop out: just size equally
for (int col2 = cell.Position.Column; col2 < cell.Position.Column + colSpan; col2++)
{
minColWidth[col2] = maxColWidth[col2] = cellWidth / colSpan;
}
}
else
{
// Increase size of columns proportionatly
nfloat colWidthUpsizeRation = cellWidth / spanWidth;
for (int col2 = cell.Position.Column; col2 < cell.Position.Column + colSpan; col2++)
{
maxColWidth[col2] *= colWidthUpsizeRation;
minColWidth[col2] = maxColWidth[col2];
}
}
}
}
}
}
}
}
#if ENABLE_DEBUG_LOG
LogLine("minColWidth:");
for (int col = 0; col < this.ColumnDefinitions.Count(); col++)
{
LogLine($" col {col}: {minColWidth[col]}");
}
#endif
totalWidth = maxColWidth.Sum(w => (float)w);
int numCols = maxColWidth.Count(w => w > 0);
totalWidth += numVisibleCols * Spacing + Padding.Left + Padding.Right;
}
else
{
totalWidth = grid.Frame.Width;
}
// Track available col width available for percent-based sized roiws
// Add width of fixed size cols
nfloat fixedWidth = this.ColumnDefinitions.Where((d) => d.Size > 1).Select(d => d.Size).Sum();
nfloat remaining = totalWidth - fixedWidth;
// Add width of auto sized columns
for (int column = 0; column < this.ColumnDefinitions.Count(); column++)
{
var definition = this.ColumnDefinitions.ElementAt(column);
if (definition.Size == -1)
{
var autoSizedCells = Cells.Where(c => c.Position.Column == column &&
c.Position.ColumnSpan == 1 && c.IncludeInAutoWidthSizeCalcs &&
c.Position.Horizontal != Alignment.Stretched);
if (autoSizedCells.Any())
{
nfloat colWidth = autoSizedCells.Max(c => c.AutoSizeSize.Width + c.Position.Margin.Width());
colWidth = NMath.Max(minColWidth[column], colWidth);
absoluteColumnWidth[column] = colWidth;
remaining -= colWidth;
}
}
}
// Add size of padding and spacing
remaining -= this.Padding.Left + this.Padding.Right;
remaining -= (numVisibleCols - 1) * this.Spacing;
remaining = (nfloat)Math.Max(0, remaining);
for (int column = 0; column < this.ColumnDefinitions.Count(); column++)
{
var definition = this.ColumnDefinitions.ElementAt(column);
if (definition.Size != -1)
{
bool includeCol = Cells.Where(c => c.Position.Column == column).Any(c => c.IncludeInAutoHeightSizeCalcs);
nfloat colWidth = !includeCol ? 0 : definition.Size > 1 ? definition.Size : definition.Size * remaining;
absoluteColumnWidth[column] = NMath.Max(minColWidth[column], colWidth);
}
}
// In auto width mode, can now take into account absolute and auto sized
// columns
if (grid.AutoWidth)
{
totalWidth = (nfloat)(
absoluteColumnWidth.Sum(w => w) +
Padding.Left + this.Padding.Right +
(numVisibleCols - 1) * this.Spacing
);
}
LogLine($"totalWidth={totalWidth}");
return(new Tuple <nfloat, nfloat[]>(totalWidth, absoluteColumnWidth));
}
/// <summary>
/// Calculates grid height and individual row heights.
/// </summary>
public Tuple <nfloat, nfloat[]> CalculateAbsoluteRowHeight(Grid grid)
{
var absoluteRowHeight = new nfloat[this.RowDefinitions.Count()];
var visibleRows = Cells.Where(c => c.IncludeInAutoHeightSizeCalcs).Select(c => c.Position.Row).Distinct();
int numVisibleRows = visibleRows.Count();
// Calculate full height of grid
nfloat totalHeight;
var minRowHeight = new nfloat[this.RowDefinitions.Count()];
if (grid.AutoHeight)
{
LogLine($"CalculateAbsoluteRowHeight AutoHeight");
var maxRowHeight = new nfloat[this.RowDefinitions.Count()];
int maxRowSpan = grid.CurrentLayout.cells.Max(c => c.Position.RowSpan);
for (int rowSpan = 1; rowSpan <= maxRowSpan; rowSpan++)
{
for (int col = 0; col < this.ColumnDefinitions.Count(); col++)
{
for (int row = 0; row < this.RowDefinitions.Count(); row++)
{
var rowDef = this.RowDefinitions[row];
var cell = FindCell(col, row);
if (cell == null)
{
continue;
}
if (cell.IncludeInAutoHeightSizeCalcs && cell.Position.RowSpan == rowSpan)
{
nfloat cellHeight = rowDef.SizeType == SizeType.Auto && cell.Position.Vertical == Alignment.Stretched
? 0f
: rowDef.SizeType == SizeType.Fixed
? rowDef.Size
: cell.AutoSizeSize.Height;
cellHeight += cell.Position.Margin.Height();
LogLine($" {cell.Position} cellHeight={cellHeight}");
if (rowSpan == 1)
{
maxRowHeight[row] = NMath.Max(maxRowHeight[row], cellHeight);
}
else
{
// Need to ensure the other rows we span have enough
// Height to account for this spanned column.
nfloat spanHeight = 0;
for (int row2 = cell.Position.Row; row2 < cell.Position.Row + rowSpan; row2++)
{
spanHeight += maxRowHeight[row2];
}
if (cellHeight > spanHeight)
{
bool hasZeroRowHeight = false;
for (int row2 = cell.Position.Row; row2 < cell.Position.Row + rowSpan; row2++)
{
if (maxRowHeight[row2] == 0)
{
hasZeroRowHeight = true;
}
}
if (hasZeroRowHeight)
{
// Cop out: just size equally
for (int row2 = cell.Position.Row; row2 < cell.Position.Row + rowSpan; row2++)
{
minRowHeight[row2] = maxRowHeight[row2] = cellHeight / rowSpan;
}
}
else
{
// Increase size of columns proportionatly
nfloat colHeightUpsizeRation = cellHeight / spanHeight;
for (int row2 = cell.Position.Row; row2 < cell.Position.Row + rowSpan; row2++)
{
maxRowHeight[row2] *= colHeightUpsizeRation;
minRowHeight[row2] = maxRowHeight[row2];
}
}
}
}
}
}
}
}
#if ENABLE_DEBUG_LOG
LogLine("minRowHeight:");
for (int row = 0; row < this.RowDefinitions.Count(); row++)
{
LogLine($" row {row}: {minRowHeight[row]}");
}
#endif
totalHeight = maxRowHeight.Sum(h => (float)h);
int numRows = maxRowHeight.Count(h => h > 0);
totalHeight += (numVisibleRows - 1) * Spacing + Padding.Top + Padding.Bottom;
}
else
{
totalHeight = grid.Frame.Height;
}
// Track available row Height available for percent-based sized roiws
// Add Height of fixed size cols
nfloat fixedHeight = this.RowDefinitions.Where((d) => d.Size > 1).Select(d => d.Size).Sum();
nfloat remaining = totalHeight - fixedHeight;
// Add Height of auto sized rows
for (int row = 0; row < this.RowDefinitions.Count(); row++)
{
var definition = this.RowDefinitions.ElementAt(row);
if (definition.Size == -1)
{
var autoSizedCells = Cells.Where(c => c.Position.Row == row &&
c.Position.RowSpan == 1 && c.IncludeInAutoHeightSizeCalcs &&
c.Position.Vertical != Alignment.Stretched);
if (autoSizedCells.Any())
{
nfloat rowHeight = autoSizedCells.Max(c => c.AutoSizeSize.Height + c.Position.Margin.Height());
rowHeight = NMath.Max(minRowHeight[row], rowHeight);
absoluteRowHeight[row] = rowHeight;
remaining -= rowHeight;
}
}
}
// Add size of padding and spacing
remaining -= this.Padding.Top + this.Padding.Bottom;
remaining -= (numVisibleRows - 1) * this.Spacing;
remaining = (nfloat)Math.Max(0, remaining);
for (int row = 0; row < this.RowDefinitions.Count(); row++)
{
var definition = this.RowDefinitions.ElementAt(row);
if (definition.Size != -1)
{
bool includeRow = Cells.Where(c => c.Position.Row == row).Any(c => c.IncludeInAutoHeightSizeCalcs);
nfloat rowHeight = !includeRow ? 0 : definition.Size > 1 ? definition.Size : definition.Size * remaining;
absoluteRowHeight[row] = NMath.Max(minRowHeight[row], rowHeight);
}
}
// In auto height mode, can now take into account absolute and auto sized
// rows
if (grid.AutoHeight)
{
totalHeight = (nfloat)(
absoluteRowHeight.Sum(h => h) +
Padding.Top + this.Padding.Bottom +
(numVisibleRows - 1) * this.Spacing
);
}
LogLine($"totalHeight={totalHeight}");
return(new Tuple <nfloat, nfloat[]>(totalHeight, absoluteRowHeight));
}
private nfloat[] CalculateColumnWidths(CGSize availableSpace)
{
var widthsByRow = new List<nfloat[]>();
foreach (var row in rows)
{
for (var i = 0; i < widths.Length; i++)
{
var width = widths[i];
var sizeRow = new nfloat[widths.Length];
switch (width.Style)
{
case TableWidthStyle.SizeToFit:
sizeRow[i] = (nfloat)row[i].SizeThatFits(new CGSize(nfloat.MaxValue, nfloat.MaxValue)).Width;
break;
case TableWidthStyle.Fixed:
sizeRow[i] = width.Value;
break;
case TableWidthStyle.Percentage:
case TableWidthStyle.Weight:
sizeRow[i] = 0;
break;
}
widthsByRow.Add(sizeRow);
}
}
var calculatedWidths = new nfloat[widths.Length];
for (var i = 0; i < widths.Length; i++)
{
calculatedWidths[i] = (nfloat)widthsByRow.Max(x => x[i]);
}
var bespokeWidth = calculatedWidths.Sum(x => x) + GetPaddingAndSpacingWidth();
var remainingWidth = availableSpace.Width - bespokeWidth;
var weightWidth = (nfloat)(remainingWidth - (nfloat)((nfloat)remainingWidth * widths.Where(x => x.Style == TableWidthStyle.Percentage).Sum(x => x.Value) / 100));
var totalWeight = widths.Where(x => x.Style == TableWidthStyle.Weight).Sum(x => x.Value);
var individualWeightWidth = weightWidth / totalWeight;
var oddManOutWeightWidth = weightWidth - individualWeightWidth * totalWeight;
var result = new nfloat[widths.Length];
for (var i = 0; i < result.Length; i++)
{
var width = widths[i];
switch (width.Style)
{
case TableWidthStyle.Fixed:
case TableWidthStyle.SizeToFit:
result[i] = calculatedWidths[i];
break;
case TableWidthStyle.Percentage:
result[i] = (nfloat)((nfloat)width.Value / 100 * remainingWidth);
break;
case TableWidthStyle.Weight:
result[i] = individualWeightWidth * width.Value + oddManOutWeightWidth;
oddManOutWeightWidth = 0;
break;
}
}
return result;
}