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;
}
}
