private void Control_PreviewKeyDown(object sender, sw.Input.KeyEventArgs e)
{
if (e.Handled || swi.Keyboard.Modifiers != swi.ModifierKeys.None)
{
return;
}
// handle expanding/collapsing via the keyboard
if (e.Key == swi.Key.Right)
{
var currentCell = Control.CurrentCell;
if (currentCell.Column != null &&
Control.Columns.IndexOf(currentCell.Column) == 0 &&
currentCell.Item is ITreeGridItem item &&
item.Expandable &&
!item.Expanded)
{
var index = controller.IndexOf(item);
if (index >= 0)
{
controller.ExpandRow(index);
e.Handled = true;
}
}
}
else if (e.Key == swi.Key.Left)
{
var currentCell = Control.CurrentCell;
if (currentCell.Column != null &&
Control.Columns.IndexOf(currentCell.Column) == 0 &&
currentCell.Item is ITreeGridItem item)
{
if (!item.Expandable || !item.Expanded)
{
// select parent if not the top node
item = item.Parent;
if (item != null && !ReferenceEquals(item, DataStore))
{
Control.CurrentCell = new swc.DataGridCellInfo(item, currentCell.Column);
SelectedItem = item;
e.Handled = true;
}
}
else
{
var index = controller.IndexOf(item);
if (index >= 0)
{
controller.CollapseRow(index);
e.Handled = true;
}
}
}
}
}
public override bool CellMouseClick(GridColumnHandler column, swf.MouseEventArgs e, int rowIndex)
{
if (rowIndex >= 0 && object.ReferenceEquals(column.Widget, this.Widget.Columns[0]))
{
var offset = INDENT_WIDTH + controller.LevelAtRow(rowIndex) * INDENT_WIDTH;
if (e.X < offset && e.X >= offset - INDENT_WIDTH)
{
if (controller.IsExpanded(rowIndex))
{
controller.CollapseRow(rowIndex);
}
else
{
controller.ExpandRow(rowIndex);
}
return(true);
}
}
return(false);
}