protected virtual void OnSelectionChanged()
{
SelectionRegion selectedRegion = this.SelectedRegion;
this.boundingRegion = !this.HasSelection ? SelectionRegion.Empty : (!(this.boundingRegion != SelectionRegion.Empty) ? this.SelectedRegion : new SelectionRegion(Math.Min(this.boundingRegion.Top, selectedRegion.Top), Math.Min(this.boundingRegion.Left, selectedRegion.Left), Math.Max(this.boundingRegion.Bottom, selectedRegion.Bottom), Math.Max(this.boundingRegion.Right, selectedRegion.Right), selectedRegion.ViewInfo));
if (this.SelectionChanged == null)
{
return;
}
this.SelectionChanged((object)this, EventArgs.Empty);
}
public void ClearSelection()
{
VirtualGridSelectionChangingEventArgs args = new VirtualGridSelectionChangingEventArgs(VirtualGridSelectionAction.ClearSelection, 0, 0, this.CurrentViewInfo);
this.OnSelectionChanging(args);
if (args.Cancel)
{
return;
}
this.ClearSelectedRegions();
this.startRow = this.endRow = this.startColumn = this.endColumn = -1;
this.boundingRegion = SelectionRegion.Empty;
this.OnSelectionChanged();
}
public void BeginSelection(
int rowIndex,
int columnIndex,
VirtualGridViewInfo viewInfo,
bool keepSelection)
{
keepSelection &= this.currentViewInfo == viewInfo;
VirtualGridSelectionChangingEventArgs args = new VirtualGridSelectionChangingEventArgs(keepSelection ? VirtualGridSelectionAction.BeginSelection : VirtualGridSelectionAction.ClearAndBeginSelection, rowIndex, columnIndex, viewInfo);
this.OnSelectionChanging(args);
if (args.Cancel)
{
return;
}
if (!keepSelection)
{
this.ClearSelectedRegions();
this.boundingRegion = SelectionRegion.Empty;
}
else
{
this.AddSelectedRegions(this.SelectedRegion);
}
this.currentViewInfo = viewInfo;
this.startRow = this.endRow = rowIndex;
if (this.SelectionMode == VirtualGridSelectionMode.CellSelect)
{
this.startColumn = this.endColumn = columnIndex;
}
else if (this.SelectionMode == VirtualGridSelectionMode.FullRowSelect)
{
this.startColumn = 0;
this.endColumn = this.CurrentViewInfo.ColumnCount - 1;
}
this.OnSelectionChanged();
}
public void AddSelectedRegions(SelectionRegion selectionRegion)
{
this.regions.Add(selectionRegion);
}
