private void Table_DragStarted(object source, TableDragStartedEventArgs e)
{
e.Handled = true;
IsDragging = true;
IsNotDragging = false;
IsDraggingTable = true;
IsNotDraggingTable = false;
var eventArgs = new TableDragStartedEventArgs(TableDragStartedEvent, this, SelectedTables);
RaiseEvent(eventArgs);
e.Cancel = eventArgs.Cancel;
}
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (isDragging)
{
Point curMousePoint = e.GetPosition(ParentTemplateView);
object item = this;
if (DataContext != null)
{
item = DataContext;
}
Vector offset = curMousePoint - lastMousePoint;
if (offset.X != 0.0 ||
offset.Y != 0.0)
{
lastMousePoint = curMousePoint;
RaiseEvent(new TableDraggingEventArgs(TableDraggingEvent, this, new object[] { item }, offset.X, offset.Y));
}
}
else if (isLeftMouseDown && ParentTemplateView.EnableTableDragging)
{
Point curMousePoint = e.GetPosition(ParentTemplateView);
var dragDelta = curMousePoint - lastMousePoint;
double dragDistance = Math.Abs(dragDelta.Length);
if (dragDistance > DragThreshold)
{
TableDragStartedEventArgs eventArgs = new TableDragStartedEventArgs(TableDragStartedEvent, this, new ItemTable[] { this });
RaiseEvent(eventArgs);
if (eventArgs.Cancel)
{
isLeftMouseDown = false;
isLeftMouseAndControlDown = false;
return;
}
isDragging = true;
CaptureMouse();
e.Handled = true;
}
}
}