private void HandleInput(RoutedEventArgs e)
{
if (beginSelect)
{
List <object> itemsToSelect = new List <object>();
List <object> itemsToUnSelect = new List <object>();
// if the mouse position or the start point is outside the window, we trim it inside
Point currentPoint = TrimPointToVisibleArea(GetMousePositionRelativeToContent());
Point trimmedStartPoint = TrimPointToVisibleArea(selectPosition.Value);
Rect selectionRect = new Rect(currentPoint, trimmedStartPoint);
border.UpdatePosition(selectionRect);
if (!SelectionMultiple.IsControlKeyDown)
{
foreach (var item in TreeView.SelectedItems)
{
var treeViewItem = TreeView.GetTreeViewItemFor(item);
Rect itemRect = GetPositionOf(treeViewItem);
if (!selectionRect.IntersectsWith(itemRect))
{
itemsToUnSelect.Add(item);
}
}
}
foreach (var item in items)
{
if (!item.IsVisible || item.IsEditing)
{
continue;
}
Rect itemRect = GetPositionOf(item);
if (selectionRect.IntersectsWith(itemRect))
{
if (!TreeView.SelectedItems.Contains(item.DataContext))
{
itemsToSelect.Add(item.DataContext);
}
}
else
{
if (!SelectionMultiple.IsControlKeyDown && TreeView.SelectedItems.Contains(item.DataContext))
{
itemsToUnSelect.Add(item.DataContext);
}
}
}
((SelectionMultiple)TreeView.Selection).SelectByRectangle(itemsToSelect, itemsToUnSelect);
}
}
private void HandleInput(RoutedEventArgs e)
{
if (mouseDown)
{
if (Mouse.LeftButton == MouseButtonState.Released)
{
mouseDown = false;
if (border != null)
{
border.Visibility = Visibility.Collapsed;
border.Dispose();
}
return;
}
if (startPoint == GetMousePositionRelativeToContent())
{
return;
}
List <object> itemsToSelect = new List <object>();
List <object> itemsToUnSelect = new List <object>();
// if the mouse position or the start point is outside the window, we trim it inside
Point currentPoint = TrimPointToVisibleArea(GetMousePositionRelativeToContent());
Point trimmedStartPoint = TrimPointToVisibleArea(startPoint);
if (isFirstMove)
{
isFirstMove = false;
border = new BorderSelectionAdorner(TreeView);
}
Rect selectionRect = new Rect(currentPoint, trimmedStartPoint);
border.UpdatePosition(selectionRect);
if (isFirstMove)
{
if (!SelectionMultiple.IsControlKeyDown)
{
foreach (var item in TreeView.SelectedItems)
{
var treeViewItem = TreeView.GetTreeViewItemFor(item);
Rect itemRect = GetPositionOf(treeViewItem);
if (!selectionRect.IntersectsWith(itemRect))
{
itemsToUnSelect.Add(item);
}
}
}
}
foreach (var item in items)
{
if (!item.IsVisible || item.IsEditing)
{
continue;
}
Rect itemRect = GetPositionOf(item);
if (selectionRect.IntersectsWith(itemRect))
{
if (isFirstMove)
{
itemsToSelect.Add(item.DataContext);
}
else
{
if (!TreeView.SelectedItems.Contains(item.DataContext))
{
itemsToSelect.Add(item.DataContext);
}
}
}
else
{
if (!SelectionMultiple.IsControlKeyDown && TreeView.SelectedItems.Contains(item.DataContext))
{
itemsToUnSelect.Add(item.DataContext);
}
}
}
((SelectionMultiple)TreeView.Selection).SelectByRectangle(itemsToSelect, itemsToUnSelect);
e.Handled = true;
}
}