internal override void OnMouseUp(MouseButtonEventArgs e)
{
if (selectPosition.HasValue && e.ChangedButton == dragButton)
{
if (beginSelect)
{
border.Visibility = Visibility.Collapsed;
border.Dispose();
border = null;
beginSelect = false;
}
selectPosition = null;
}
}
internal override void OnMouseUp(MouseButtonEventArgs e)
{
if (isFirstMove)
{
return;
}
if (startPoint == GetMousePositionRelativeToContent())
{
bool overItem = false;
foreach (var item in items)
{
if (item.IsEditing)
{
continue;
}
Rect itemRect = GetPositionOf(item);
if (itemRect.Contains(startPoint))
{
overItem = true;
break;
}
}
if (!overItem)
{
List <object> itemsToUnselect = new List <object>();
foreach (var item in TreeView.SelectedItems)
{
itemsToUnselect.Add(item);
}
((SelectionMultiple)TreeView.Selection).SelectByRectangle(new List <object>(), itemsToUnselect);
}
}
mouseDown = false;
if (border != null)
{
border.Visibility = Visibility.Collapsed;
border.Dispose();
border = null;
e.Handled = true;
}
}
internal override void OnMouseMove(MouseEventArgs e)
{
if (selectPosition.HasValue)
{
if (!beginSelect)
{
// detect select
var dragDiff = selectPosition.Value - e.GetPosition(TreeView);
if ((Math.Abs(dragDiff.X) > SystemParameters.MinimumHorizontalDragDistance || Math.Abs(dragDiff.Y) > SystemParameters.MinimumVerticalDragDistance))
{
// begin select
border = new BorderSelectionAdorner(TreeView);
beginSelect = true;
}
}
if (beginSelect)
{
HandleInput(e);
}
}
}
private void OnMouseMove(object sender, MouseEventArgs e)
{
if (mouseDown)
{
if (isFirstMove)
{
isFirstMove = false;
border = new BorderSelectionAdorner(content);
if (!SelectionMultiple.IsControlKeyDown)
{
content.ClearSelectionByRectangle();
}
}
Point currentPoint = Mouse.GetPosition(content);
double width = currentPoint.X - startPoint.X;
double height = currentPoint.Y - startPoint.Y;
double left = startPoint.X;
double top = startPoint.Y;
double x = startPoint.X < currentPoint.X ? startPoint.X : currentPoint.X;
double y = startPoint.Y < currentPoint.Y ? startPoint.Y : currentPoint.Y;
// System.Diagnostics.Debug.WriteLine(string.Format("Drawing: {0};{1};{2};{3}",startPoint.X,startPoint.Y,width,height));
if (width < 0)
{
width = Math.Abs(width);
left = startPoint.X - width;
}
if (height < 0)
{
height = Math.Abs(height);
top = startPoint.Y - height;
}
border.Width = width;
border.Height = height;
border.UpdatePosition(new Point(x, y));
double right = left + width;
double bottom = top + height;
// System.Diagnostics.Debug.WriteLine(string.Format("left:{1};right:{2};top:{3};bottom:{4}", null, left, right, top, bottom));
foreach (var item in items)
{
if (!item.IsVisible)
{
continue;
}
FrameworkElement itemContent = (FrameworkElement)item.Template.FindName("headerBorder", item);
Point p = itemContent.TransformToAncestor(content).Transform(new Point());
double itemLeft = p.X;
double itemRight = p.X + itemContent.ActualWidth;
double itemTop = p.Y;
double itemBottom = p.Y + itemContent.ActualHeight;
// System.Diagnostics.Debug.WriteLine(string.Format("element:{0};itemleft:{1};itemright:{2};itemtop:{3};itembottom:{4}",item.DataContext,itemLeft,itemRight,itemTop,itemBottom));
if (!(itemLeft > right || itemRight < left || itemTop > bottom || itemBottom < top))
{
if (!content.SelectedItems.Contains(item.DataContext))
{
((SelectionMultiple)content.Selection).SelectByRectangle(item);
}
// System.Diagnostics.Debug.WriteLine("Is selected: " + item);
}
else
{
if (!SelectionMultiple.IsControlKeyDown)
{
((SelectionMultiple)content.Selection).UnSelectByRectangle(item);
}
}
}
e.Handled = true;
}
}
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;
}
}
internal override void OnMouseUp(MouseButtonEventArgs e)
{
if (isFirstMove) return;
if (startPoint == GetMousePositionRelativeToContent())
{
bool overItem = false;
foreach (var item in items)
{
if (item.IsEditing) continue;
Rect itemRect = GetPositionOf(item);
if (itemRect.Contains(startPoint))
{
overItem = true;
break;
}
}
if (!overItem)
{
List<object> itemsToUnselect = new List<object>();
foreach (var item in TreeView.SelectedItems)
{
itemsToUnselect.Add(item);
}
((SelectionMultiple)TreeView.Selection).SelectByRectangle(new List<object>(), itemsToUnselect);
}
}
mouseDown = false;
if (border != null)
{
border.Visibility = Visibility.Collapsed;
border.Dispose();
border = null;
e.Handled = true;
}
}
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;
}
}
