private static void OnParentDataGridChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
DataGridScrollViewer scrollViewer = sender as DataGridScrollViewer;
if (scrollViewer != null)
{
if (e.NewValue == null)
{
scrollViewer.ClearScrollViewerList();
}
}
}
private static void OnSynchronizedScrollViewerExtentPropertyChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
DataGridScrollViewer dataGridScrollViewer = o as DataGridScrollViewer;
if (dataGridScrollViewer != null)
{
FrameworkElement panel = dataGridScrollViewer.ScrollInfo as FrameworkElement;
if (panel != null)
{
panel.InvalidateMeasure();
}
}
}
public void CalculateColumnStretchWidths(double widthToDistribute, ColumnStretchMode columnStretchMode, double columnStretchMinWidth)
{
if (m_columnStretchingDisabled)
{
return;
}
int currentDataGridScrollViewerMeasureVersion = 0;
DataGridControl dataGridControl = m_dataGridContext.DataGridControl;
if (dataGridControl != null)
{
DataGridScrollViewer scrollViewer = dataGridControl.ScrollViewer as DataGridScrollViewer;
if (scrollViewer != null)
{
currentDataGridScrollViewerMeasureVersion = scrollViewer.MeasureVersion;
}
}
this.ColumnStretchingCalculated = true;
if (m_dataGridScrollViewerMeasureVersion != currentDataGridScrollViewerMeasureVersion)
{
// Reset the widthToDistribute since we are in a new pass of measure in the DataGridScrollViewer
m_widthToDistribute = widthToDistribute;
m_dataGridScrollViewerMeasureVersion = currentDataGridScrollViewerMeasureVersion;
}
else
{
if (widthToDistribute >= m_widthToDistribute)
{
widthToDistribute = m_widthToDistribute;
}
else
{
m_widthToDistribute = widthToDistribute;
}
}
List <WorkingColumnWidth> excludedColumns = null;
ColumnBase stretchedColumn = null;
ReadOnlyObservableCollection <ColumnBase> visibleColumns = m_dataGridContext.VisibleColumns;
if (visibleColumns.Count == 0)
{
return;
}
switch (columnStretchMode)
{
case ColumnStretchMode.First:
stretchedColumn = visibleColumns[0];
excludedColumns = new List <WorkingColumnWidth>(1);
break;
case ColumnStretchMode.Last:
stretchedColumn = visibleColumns[visibleColumns.Count - 1];
excludedColumns = new List <WorkingColumnWidth>(1);
break;
case ColumnStretchMode.All:
excludedColumns = new List <WorkingColumnWidth>(visibleColumns.Count);
foreach (ColumnBase column in visibleColumns)
{
excludedColumns.Add(new WorkingColumnWidth(column, 1d, columnStretchMinWidth));
}
break;
case ColumnStretchMode.None:
foreach (ColumnBase column in visibleColumns)
{
if (column.Width.UnitType == ColumnWidthUnitType.Star)
{
if (excludedColumns == null)
{
excludedColumns = new List <WorkingColumnWidth>();
}
excludedColumns.Add(new WorkingColumnWidth(column, column.Width.Value, columnStretchMinWidth));
}
else
{
column.ClearValue(Column.DesiredWidthProperty);
widthToDistribute -= column.ActualWidth;
}
}
break;
}
if (excludedColumns != null)
{
if (stretchedColumn != null)
{
foreach (ColumnBase column in visibleColumns)
{
if (column == stretchedColumn)
{
excludedColumns.Add(new WorkingColumnWidth(column, 1, columnStretchMinWidth));
}
else
{
column.ClearValue(Column.DesiredWidthProperty);
widthToDistribute -= column.ActualWidth;
}
}
}
this.CalculateColumnDesiredWidth(widthToDistribute, excludedColumns);
}
}
