protected override Size MeasureOverride(Size availableSize)
{
if (Row == -1 || availableSize.Width == 0.0 || availableSize.Height == 0.0)
{
foreach (UIElement elem in Children)
{
elem.Measure(_szEmpty);
}
return(_szEmpty);
}
ColumnLayoutModel colLayoutModel = GetColumnLayoutModel();
RowLayout layout = OwnPanel.GetRowLayoutModel().FindRow(Row);
CellOverflowLayoutModel cellOverflowLayoutModel = OwnPanel.GetCellOverflowLayoutModel(Row);
RowWidth = 0.0;
double height = 0.0;
foreach (ColumnLayout colLayout in colLayoutModel)
{
RowWidth += colLayout.Width;
CellItem cell = GetCell(colLayout.Column);
if (cell == null)
{
continue;
}
double w = colLayout.Width;
double h = layout.Height;
if (cell.CellLayout != null)
{
w = cell.CellLayout.Width;
h = cell.CellLayout.Height;
}
cell.CellOverflowLayout = null;
if (cell.CellLayout == null && cellOverflowLayoutModel != null)
{
var cellOverflowLayout = cellOverflowLayoutModel.GetCellOverflowLayout(colLayout.Column);
if ((cellOverflowLayout != null) && (cellOverflowLayout.Column == colLayout.Column))
{
cell.CellOverflowLayout = cellOverflowLayout;
}
}
cell.Measure(new Size(w, h));
if (h > height)
{
height = h;
}
}
if (_recycledCells.Count > 0)
{
foreach (var cell in _recycledCells)
{
cell.Measure(_szEmpty);
}
}
double width = Math.Min(RowWidth, OwnPanel.GetViewportSize().Width);
if (cellOverflowLayoutModel != null)
{
Worksheet worksheet = OwnPanel.Excel.ActiveSheet;
float zoomFactor = OwnPanel.Excel.ZoomFactor;
if (cellOverflowLayoutModel.HeadingOverflowlayout != null)
{
HeadingOverflowCell.CellOverflowLayout = cellOverflowLayoutModel.HeadingOverflowlayout;
double num8 = worksheet.GetActualColumnWidth(cellOverflowLayoutModel.HeadingOverflowlayout.Column, SheetArea.Cells) * zoomFactor;
Size size = new Size(num8, layout.Height);
HeadingOverflowCell.Measure(size);
}
if (cellOverflowLayoutModel.TrailingOverflowlayout != null)
{
TrailingOverflowCell.CellOverflowLayout = cellOverflowLayoutModel.TrailingOverflowlayout;
double num9 = worksheet.GetActualColumnWidth(cellOverflowLayoutModel.TrailingOverflowlayout.Column, SheetArea.Cells) * zoomFactor;
Size size2 = new Size(num9, layout.Height);
TrailingOverflowCell.Measure(size2);
}
}
return(new Size(width, height));
}
protected override Size ArrangeOverride(Size finalSize)
{
if (Row == -1 || finalSize.Width == 0 || finalSize.Height == 0)
{
foreach (UIElement elem in Children)
{
elem.Arrange(_rcEmpty);
}
return(finalSize);
}
ColumnLayoutModel colLayoutModel = GetColumnLayoutModel();
RowLayout layout = OwnPanel.GetRowLayoutModel().FindRow(Row);
foreach (ColumnLayout colLayout in colLayoutModel)
{
CellItem cell;
if (colLayout.Width <= 0.0 || (cell = GetCell(colLayout.Column)) == null)
{
continue;
}
double left = colLayout.X;
double top = layout.Y;
double w = colLayout.Width;
double h = layout.Height;
int zIndex = _normalCellZIndexBase + colLayout.Column;
CellLayout cellLayout = cell.CellLayout;
if (cellLayout != null)
{
left = cellLayout.X;
top = cellLayout.Y;
w = cellLayout.Width;
h = cellLayout.Height;
zIndex = _spanCellZIndexBase + colLayout.Column;
}
// Canvas.SetZIndex 对所有继承自 Panel 的面板都有效，z值大的在上层，z值相同时按 Children 的索引，索引大的在上层
// 但uno中 Canvas.SetZIndex 无效，只按 Children 的索引确定层次！
if (cell.CellOverflowLayout != null)
{
zIndex = _flowCellZIndexBase + colLayout.Column;
}
zIndex = zIndex % 0x7ffe;
Canvas.SetZIndex(cell, zIndex);
cell.Arrange(new Rect(left - Location.X, top - Location.Y, w, h));
}
if (_recycledCells.Count > 0)
{
foreach (var cell in _recycledCells)
{
cell.Arrange(_rcEmpty);
}
}
CellOverflowLayoutModel cellOverflowLayoutModel = OwnPanel.GetCellOverflowLayoutModel(Row);
if (cellOverflowLayoutModel == null)
{
return(finalSize);
}
Worksheet worksheet = OwnPanel.Excel.ActiveSheet;
float zoomFactor = OwnPanel.Excel.ZoomFactor;
if (cellOverflowLayoutModel.HeadingOverflowlayout != null)
{
double num7 = Location.X;
double num8 = layout.Y;
for (int j = cellOverflowLayoutModel.HeadingOverflowlayout.Column; j < colLayoutModel[0].Column; j++)
{
double actualColumnWidth = worksheet.GetActualColumnWidth(j, SheetArea.Cells);
num7 -= actualColumnWidth * zoomFactor;
}
double num12 = worksheet.GetActualColumnWidth(cellOverflowLayoutModel.HeadingOverflowlayout.Column, SheetArea.Cells) * zoomFactor;
Size size = new Size(num12, layout.Height);
Rect rect = new Rect(PointToClient(new Point(num7, num8)), size);
int num13 = _flowCellZIndexBase + cellOverflowLayoutModel.HeadingOverflowlayout.Column;
num13 = num13 % 0x7ffe;
Canvas.SetZIndex(HeadingOverflowCell, num13);
HeadingOverflowCell.Arrange(rect);
}
if (cellOverflowLayoutModel.TrailingOverflowlayout == null)
{
return(finalSize);
}
ColumnLayout layout4 = colLayoutModel[colLayoutModel.Count - 1];
if (layout4 == null)
{
return(finalSize);
}
double x = layout4.X;
double y = layout.Y;
for (int i = layout4.Column; i < cellOverflowLayoutModel.TrailingOverflowlayout.Column; i++)
{
x += worksheet.GetActualColumnWidth(i, SheetArea.Cells) * zoomFactor;
}
double width = worksheet.GetActualColumnWidth(cellOverflowLayoutModel.TrailingOverflowlayout.Column, SheetArea.Cells) * zoomFactor;
Size size2 = new Size(width, layout.Height);
Rect rect2 = new Rect(PointToClient(new Point(x, y)), size2);
int num18 = _flowCellZIndexBase + cellOverflowLayoutModel.TrailingOverflowlayout.Column;
num18 = num18 % 0x7ffe;
Canvas.SetZIndex(TrailingOverflowCell, num18);
TrailingOverflowCell.Arrange(rect2);
return(finalSize);
}
//*** CellsPanel.Measure -> RowsLayer.Measure -> RowItem.UpdateChildren -> 行列改变时 CellItem.UpdateChildren -> RowItem.Measure -> CellItem.Measure ***//
public void UpdateChildren(bool p_updateAllCell)
{
// 频繁增删Children子元素会出现卡顿现象！
// Children = Cells + _recycledCells
ColumnLayoutModel colLayoutModel = GetColumnLayoutModel();
int less = colLayoutModel.Count - Children.Count + (_headingOverflowCell == null ? 0 : 1) + (_trailingOverflowCell == null ? 0 : 1);
if (less > 0)
{
for (int i = 0; i < less; i++)
{
var cell = new CellItem(this);
Children.Add(cell);
_recycledCells.Add(cell);
}
}
// 先回收不可见格
var cols = Cells.Values.ToList();
foreach (var cell in cols)
{
ColumnLayout layout = colLayoutModel.FindColumn(cell.Column);
if (layout == null || layout.Width <= 0.0)
{
PushRecycledCell(cell);
}
}
int updateCells = 0;
ContainsSpanCell = false;
SpanGraph cachedSpanGraph = OwnPanel.CachedSpanGraph;
for (int i = 0; i < colLayoutModel.Count; i++)
{
ColumnLayout colLayout = colLayoutModel[i];
if (colLayout.Width <= 0.0)
{
continue;
}
byte state = cachedSpanGraph.GetState(Row, colLayout.Column);
CellLayout layout = null;
if (state > 0)
{
CellLayoutModel cellLayoutModel = OwnPanel.GetCellLayoutModel();
if (cellLayoutModel != null)
{
layout = cellLayoutModel.FindCell(Row, colLayout.Column);
if (layout != null)
{
ContainsSpanCell = true;
}
}
}
CellItem cell = GetCell(colLayout.Column);
bool rangeChanged = false;
if (layout != null && layout.Width > 0.0 && layout.Height > 0.0)
{
CellRange range = ClipCellRange(layout.GetCellRange());
rangeChanged = (Row != range.Row) || (range.Column != colLayout.Column);
// 跨多列
if (layout.ColumnCount > 1)
{
// 移除跨度区域内的所有格
int maxCol = (layout.Column + layout.ColumnCount) - 1;
for (int j = i + 1; j < colLayoutModel.Count; j++)
{
int curCol = colLayoutModel[j].Column;
if (curCol > maxCol)
{
break;
}
i = j;
CellItem ci = GetCell(curCol);
if (ci != null)
{
PushRecycledCell(ci);
}
}
}
}
// 跨度不同不显示
if (rangeChanged)
{
if (cell != null)
{
PushRecycledCell(cell);
}
continue;
}
bool updated = false;
if (cell == null)
{
// 重新利用回收的格
cell = _recycledCells[0];
_recycledCells.RemoveAt(0);
cell.Column = colLayout.Column;
Cells.Add(colLayout.Column, cell);
updated = true;
}
cell.CellLayout = layout;
if (p_updateAllCell || updated)
{
cell.UpdateChildren();
updateCells++;
}
}
CellOverflowLayoutModel cellOverflowLayoutModel = OwnPanel.GetCellOverflowLayoutModel(Row);
if ((cellOverflowLayoutModel != null) && !cellOverflowLayoutModel.IsEmpty)
{
if (cellOverflowLayoutModel.HeadingOverflowlayout != null)
{
if (HeadingOverflowCell == null)
{
HeadingOverflowCell = new CellItem(this);
}
if (HeadingOverflowCell.Column != cellOverflowLayoutModel.HeadingOverflowlayout.Column)
{
HeadingOverflowCell.Column = cellOverflowLayoutModel.HeadingOverflowlayout.Column;
HeadingOverflowCell.UpdateChildren();
updateCells++;
}
}
else
{
HeadingOverflowCell = null;
}
if (cellOverflowLayoutModel.TrailingOverflowlayout != null)
{
if (TrailingOverflowCell == null)
{
TrailingOverflowCell = new CellItem(this);
}
if (TrailingOverflowCell.Column != cellOverflowLayoutModel.TrailingOverflowlayout.Column)
{
TrailingOverflowCell.Column = cellOverflowLayoutModel.TrailingOverflowlayout.Column;
TrailingOverflowCell.UpdateChildren();
updateCells++;
}
}
else
{
TrailingOverflowCell = null;
}
}
else
{
HeadingOverflowCell = null;
TrailingOverflowCell = null;
}
#if !IOS
// iOS在 MeasureOverride 内部调用子元素的 InvalidateMeasure 会造成死循环！
// 不重新测量会造成如：迷你图忽大忽小的情况
if (updateCells > 0)
{
InvalidateMeasure();
}
#endif
}
