private void SetResizeCursor(Point mousePosition)
{
if (_resizingColumn != null)
{
return;
}
// set mouse if we can resize column
double distanceFromLeft = mousePosition.X;
double distanceFromRight = this.Width - distanceFromLeft;
DataGridColumnBase currentColumn = this.OwningColumn;
DataGridColumnBase previousColumn = null;
if (!(this.OwningColumn is DataGridFillerColumn))
{
previousColumn = this.OwningGrid.ColumnsInternal.GetPreviousVisibleColumn(currentColumn);
}
if (distanceFromRight <= DATAGRIDCOLUMNHEADER_resizeRegionWidth && currentColumn != null && CanResizeColumn(currentColumn))
{
this.Cursor = new Cursor(StandardCursorType.SizeWestEast);
}
else if (distanceFromLeft <= DATAGRIDCOLUMNHEADER_resizeRegionWidth && previousColumn != null && CanResizeColumn(previousColumn))
{
this.Cursor = new Cursor(StandardCursorType.SizeWestEast);
}
else
{
this.Cursor = new Cursor(StandardCursorType.Arrow);
}
}
public DataGridCellEditingCancelEventArgs(DataGridColumnBase dataGridColumn,
DataGridRow dataGridRow,
Control element,
DataGridEditingTriggerInfo editingTriggerInfo) : base(dataGridColumn, dataGridRow, element)
{
this.EditingTriggerInfo = editingTriggerInfo;
}
private bool TrySetResizeColumn(DataGridColumnBase column)
{
// If datagrid.CanUserResizeColumns == false, then the column can still override it
if (CanResizeColumn(column))
{
_resizingColumn = column;
//
return(true);
}
return(false);
}
private void DataGridColumnHeader_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
_resizeStart = null;
ReleaseMouseCapture();
if (_resizingColumn != null)
{
_resizingColumn = null;
//
SetResizeCursor(e.GetPosition(this));
e.Handled = true;
}
}
public DataGridCellEventArgs(DataGridColumnBase dataGridColumn,
DataGridRow dataGridRow,
Control element)
{
if (dataGridColumn == null)
{
throw new ArgumentNullException("dataGridColumn");
}
if (dataGridRow == null)
{
throw new ArgumentNullException("dataGridRow");
}
if (element == null)
{
throw new ArgumentNullException("element");
}
this.Column = dataGridColumn;
this.Row = dataGridRow;
this.Element = element;
}
private void DataGridColumnHeader_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (!e.Handled && this.OwningGrid != null)
{
Point mousePosition = e.GetPosition(this);
double distanceFromLeft = mousePosition.X;
double distanceFromRight = this.Width - distanceFromLeft;
DataGridColumnBase currentColumn = this.OwningColumn;
DataGridColumnBase previousColumn = null;
if (!(this.OwningColumn is DataGridFillerColumn))
{
previousColumn = this.OwningGrid.ColumnsInternal.GetPreviousVisibleColumn(currentColumn);
}
if (_resizingColumn == null && (distanceFromRight <= DATAGRIDCOLUMNHEADER_resizeRegionWidth))
{
e.Handled = TrySetResizeColumn(currentColumn);
}
else if (_resizingColumn == null && distanceFromLeft <= DATAGRIDCOLUMNHEADER_resizeRegionWidth && previousColumn != null)
{
e.Handled = TrySetResizeColumn(previousColumn);
}
if (_resizingColumn != null)
{
this.CaptureMouse();
_resizeStart = e.GetPosition(this.OwningGrid);
_originalWidth = _resizingColumn.Width;
_originalHorizontalOffset = this.OwningGrid.HorizontalOffset;
_lastResizeWidth = _originalWidth;
e.Handled = true;
}
}
}
private bool CanResizeColumn(DataGridColumnBase column)
{
return(this.OwningGrid.CanUserResizeColumns &&
!(column is DataGridFillerColumn) &&
(column.CanUserResize.HasValue && column.CanUserResize.Value || !column.CanUserResize.HasValue));
}
public DataGridCellCancelEventArgs(DataGridColumnBase dataGridColumn,
DataGridRow dataGridRow,
Control element) : base(dataGridColumn, dataGridRow, element)
{
}
public DataGridValueConverter(DataGridColumnBase dataGridColumn)
{
this.Column = dataGridColumn;
}
