private async Task DrawVisualsAsync(GridRange dataViewport, IGridData <string> data, GridUpdateType updateType, Rect visualViewport, bool suppressNotification, CancellationToken token)
{
await _services.MainThread().SwitchToAsync(token);
DataGrid.SelectedIndex = new GridIndex(Math.Min(DataGrid.SelectedIndex.Row, DataProvider.RowCount - 1), Math.Min(DataGrid.SelectedIndex.Column, DataProvider.ColumnCount - 1));
var columnsData = new RangeToGrid <string>(dataViewport.Columns, data.ColumnHeader, true);
var rowsData = new RangeToGrid <string>(dataViewport.Rows, data.RowHeader, false);
var cellsData = data.Grid;
using (Points.DeferChangeNotification(suppressNotification)) {
// measure points
ColumnHeader.MeasurePoints(
Points.GetAccessToPoints(ColumnHeader.ScrollDirection),
new GridRange(new Range(0, 1), dataViewport.Columns),
columnsData,
updateType);
RowHeader.MeasurePoints(
Points.GetAccessToPoints(RowHeader.ScrollDirection),
new GridRange(dataViewport.Rows, new Range(0, 1)),
rowsData,
updateType == Sort ? Refresh : updateType);
DataGrid.MeasurePoints(
Points.GetAccessToPoints(DataGrid.ScrollDirection),
dataViewport,
cellsData,
updateType == Sort ? Refresh : updateType);
// adjust Offset in case of overflow
if ((Points.HorizontalOffset + visualViewport.Width).GreaterOrCloseTo(Points.HorizontalExtent))
{
Points.HorizontalOffset = Points.HorizontalExtent - visualViewport.Width;
}
if ((Points.VerticalOffset + visualViewport.Height).GreaterOrCloseTo(Points.VerticalExtent))
{
Points.VerticalOffset = Points.VerticalExtent - visualViewport.Height;
}
if (updateType == ScrollIntoView)
{
AdjustFocusedCellOffset(visualViewport);
}
// arrange and draw gridline
ColumnHeader.ArrangeVisuals(Points.GetAccessToPoints(ColumnHeader.ScrollDirection));
RowHeader.ArrangeVisuals(Points.GetAccessToPoints(RowHeader.ScrollDirection));
DataGrid.ArrangeVisuals(Points.GetAccessToPoints(DataGrid.ScrollDirection));
Points.ViewportHeight = DataGrid.RenderSize.Height;
Points.ViewportWidth = DataGrid.RenderSize.Width;
}
DataViewport = dataViewport;
Data = data;
_owner.AutomationPeer?.Update();
}
private void DrawVisuals(
GridRange dataViewport,
IGridData <string> data,
bool refresh,
Rect visualViewport,
bool suppressNotification)
{
using (var deferal = Points.DeferChangeNotification(suppressNotification)) {
// measure points
ColumnHeader?.MeasurePoints(
Points.GetAccessToPoints(ColumnHeader.ScrollDirection),
new GridRange(new Range(0, 1), dataViewport.Columns),
new RangeToGrid <string>(dataViewport.Columns, data.ColumnHeader, true),
refresh);
RowHeader?.MeasurePoints(
Points.GetAccessToPoints(RowHeader.ScrollDirection),
new GridRange(dataViewport.Rows, new Range(0, 1)),
new RangeToGrid <string>(dataViewport.Rows, data.RowHeader, false),
refresh);
DataGrid?.MeasurePoints(
Points.GetAccessToPoints(DataGrid.ScrollDirection),
dataViewport,
data.Grid,
refresh);
// adjust Offset in case of overflow
if ((Points.HorizontalOffset + visualViewport.Width).GreaterThanOrClose(Points.HorizontalExtent))
{
Points.HorizontalOffset = Points.HorizontalExtent - visualViewport.Width;
}
if ((Points.VerticalOffset + visualViewport.Height).GreaterThanOrClose(Points.VerticalExtent))
{
Points.VerticalOffset = Points.VerticalExtent - visualViewport.Height;
}
// arrange and draw gridline
ColumnHeader?.ArrangeVisuals(Points.GetAccessToPoints(ColumnHeader.ScrollDirection));
RowHeader?.ArrangeVisuals(Points.GetAccessToPoints(RowHeader.ScrollDirection));
DataGrid?.ArrangeVisuals(Points.GetAccessToPoints(DataGrid.ScrollDirection));
Points.ViewportHeight = DataGrid.RenderSize.Height;
Points.ViewportWidth = DataGrid.RenderSize.Width;
}
}
