protected override void OnPreviewKeyDown(KeyEventArgs e)
{
base.OnPreviewKeyDown(e);
//在编辑控件按 Tab 切换到下一列
if (e.Key == Key.Tab)
{
bool moveNext = !TreeGridHelper.IsShiftPressed();
this.Column.EditNextColumnOnTabKey(this, moveNext, e, this.Column);
}
}
/// <summary>
/// 选择核心逻辑。
///
/// 处理多选及单选状态下的 SelectionModel 中数据状态。
/// </summary>
/// <param name="oldItem"></param>
/// <param name="newItem"></param>
private void SelectionCore(object oldItem, object newItem)
{
var ctrlPressed = TreeGridHelper.IsCtrlPressed();
var shiftPressed = TreeGridHelper.IsShiftPressed();
//当前是否正处于多选模式下。
var inMultiSelectionMode = this._forceMultiSelect || ctrlPressed || shiftPressed;
this.ShiftSelectStart(shiftPressed, oldItem, newItem);
//如果不是多选状态，则先清空选中行状态。
var sm = this.SelectionModel;
if (!inMultiSelectionMode)
{
sm.ClearSelectedItems();
}
if (newItem != null)
{
if (ctrlPressed || this._forceMultiSelect)
{
//反选该行
var selected = sm.InnerItems.Contains(newItem);
sm.MarkItemSelected(newItem, !selected);
}
else if (shiftPressed)
{
sm.ClearSelectedItems();
if (this._shiftStartItem != null)
{
this.ShiftSelectEnd(newItem);
}
}
else
{
sm.MarkItemSelected(newItem, true);
}
}
else
{
if (!this._forceMultiSelect)
{
sm.ClearSelectedItems();
}
}
}