private void ItemDragDelta(object sender, DragablzDragDeltaEventArgs eventArgs)
{
var bounds = new Size(ItemsPresenterWidth, ItemsPresenterHeight);
var desiredLocation = new Point(
eventArgs.DragablzItem.X + eventArgs.DragDeltaEventArgs.HorizontalChange,
eventArgs.DragablzItem.Y + eventArgs.DragDeltaEventArgs.VerticalChange
);
if (ItemsOrganiser != null)
{
if (FixedItemCount > 0 &&
ItemsOrganiser.Sort(DragablzItems()).Take(FixedItemCount).Contains(eventArgs.DragablzItem))
{
eventArgs.Handled = true;
return;
}
desiredLocation = ItemsOrganiser.ConstrainLocation(this, bounds,
new Point(eventArgs.DragablzItem.X, eventArgs.DragablzItem.Y),
new Size(eventArgs.DragablzItem.ActualWidth, eventArgs.DragablzItem.ActualHeight),
desiredLocation, eventArgs.DragablzItem.DesiredSize);
}
foreach (var dragableItem in DragablzItems()
.Except(new[] { eventArgs.DragablzItem })) // how about Linq.Where() ?
{
dragableItem.IsSiblingDragging = true;
}
eventArgs.DragablzItem.IsDragging = true;
eventArgs.DragablzItem.X = desiredLocation.X;
eventArgs.DragablzItem.Y = desiredLocation.Y;
if (ItemsOrganiser != null)
{
ItemsOrganiser.OrganiseOnDrag(
this,
bounds,
DragablzItems().Except(new[] { eventArgs.DragablzItem }), eventArgs.DragablzItem);
}
eventArgs.DragablzItem.BringIntoView();
eventArgs.Handled = true;
}
private void ThumbOnDragDelta(object sender, DragDeltaEventArgs dragDeltaEventArgs)
{
var thumb = (Thumb)sender;
var previewEventArgs = new DragablzDragDeltaEventArgs(PreviewDragDelta, this, dragDeltaEventArgs);
OnPreviewDragDelta(previewEventArgs);
if (previewEventArgs.Cancel)
{
thumb.CancelDrag();
}
if (!previewEventArgs.Handled)
{
var eventArgs = new DragablzDragDeltaEventArgs(DragDelta, this, dragDeltaEventArgs);
OnDragDelta(eventArgs);
if (eventArgs.Cancel)
{
thumb.CancelDrag();
}
}
}
protected void OnPreviewDragDelta(DragablzDragDeltaEventArgs e)
{
RaiseEvent(e);
}