public CatrobatListViewWorker()
{
_verticalItemMargin = 0;
_reorderEnabled = false;
GroupingEnabled = true;
_dragging = CatrobatListViewDragStaus.NotDragging;
_draggingItem = null;
SmartSelectedItems = new ObservableCollection<object>();
SmartSelectedItems.CollectionChanged += SmartSelectedItems_CollectionChanged;
_autoScrollOldYValue = 0;
_rearrangeOldYValue = 0;
SelectionEnabled = false;
}
public CatrobatListViewWorker()
{
_verticalItemMargin = 0;
_reorderEnabled = false;
GroupingEnabled = true;
_dragging = CatrobatListViewDragStaus.NotDragging;
_draggingItem = null;
SmartSelectedItems = new ObservableCollection <object>();
SmartSelectedItems.CollectionChanged += SmartSelectedItems_CollectionChanged;
_autoScrollOldYValue = 0;
_rearrangeOldYValue = 0;
SelectionEnabled = false;
}
private void AddSnapshotToManipulationCanvas(double yPos)
{
_manipulationCanvas.Children.Clear();
CatrobatListViewItem tmpItemClone = GenerateDraggingItemClone();
if (_dragging == CatrobatListViewDragStaus.PrepareDraggin)
{
Items[Items.IndexOf(_originalDragContent.Content)] = _tmpDragContentControl;
SetTmpDragContentHeight();
_manipulationCanvas.Children.Add(tmpItemClone);
Canvas.SetLeft(tmpItemClone, ActualWidth - tmpItemClone.Width);
SetYPositionTo(yPos);
_manipulationCanvas.Visibility = Visibility.Visible;
_dragging = CatrobatListViewDragStaus.Dragging;
}
}
private void EndDrag()
{
if (_dragging == CatrobatListViewDragStaus.NotDragging)
{
return;
}
_dragging = CatrobatListViewDragStaus.NotDragging;
_manipulationCanvas.Visibility = Visibility.Collapsed;
if (Items.IndexOf(_tmpDragContentControl) != -1)
{
ItemDragCompletedEvent(this, new CatrobatListViewEventArgs(_tmpDragContentControl, _originalDragContent, null, null, _draggingGroupList));
if (_draggingGroupList != null && _draggingGroupList.Count > 0)
{
_draggingGroupList.Clear();
_draggingItem = null;
var tmpItem = ContainerFromItem(_originalDragContent.Content) as CatrobatListViewItem;
GroupItem(tmpItem);
}
}
}
private void StartDrag(int index, double yPos)
{
var tmpItem = this.ContainerFromIndex(index) as CatrobatListViewItem;
if (tmpItem == null || tmpItem.ReorderEnabled == false)
{
return;
}
_dragging = CatrobatListViewDragStaus.PrepareDraggin;
_draggingItem = tmpItem;
InitDragContentObject();
if (_draggingItem.IsGrouped)
{
InitDragGroupList();
}
MoveValidationCalculation(index);
AddSnapshotToManipulationCanvas(yPos);
}
private void AddSnapshotToManipulationCanvas(double yPos)
{
_manipulationCanvas.Children.Clear();
CatrobatListViewItem tmpItemClone = GenerateDraggingItemClone();
if (_dragging == CatrobatListViewDragStaus.PrepareDraggin)
{
Items[Items.IndexOf(_originalDragContent.Content)] = _tmpDragContentControl;
SetTmpDragContentHeight();
_manipulationCanvas.Children.Add(tmpItemClone);
Canvas.SetLeft(tmpItemClone, ActualWidth - tmpItemClone.Width);
SetYPositionTo(yPos);
_manipulationCanvas.Visibility = Visibility.Visible;
_dragging = CatrobatListViewDragStaus.Dragging;
}
}
private void StartDrag(int index, double yPos)
{
var tmpItem = this.ContainerFromIndex(index) as CatrobatListViewItem;
if (tmpItem == null || tmpItem.ReorderEnabled == false)
{
return;
}
_dragging = CatrobatListViewDragStaus.PrepareDraggin;
_draggingItem = tmpItem;
InitDragContentObject();
if (_draggingItem.IsGrouped)
{
InitDragGroupList();
}
MoveValidationCalculation(index);
AddSnapshotToManipulationCanvas(yPos);
}
private void EndDrag()
{
if (_dragging == CatrobatListViewDragStaus.NotDragging)
{
return;
}
_dragging = CatrobatListViewDragStaus.NotDragging;
_manipulationCanvas.Visibility = Visibility.Collapsed;
if (Items.IndexOf(_tmpDragContentControl) != -1)
{
ItemDragCompletedEvent(this, new CatrobatListViewEventArgs(_tmpDragContentControl, _originalDragContent, null, null, _draggingGroupList));
if (_draggingGroupList != null && _draggingGroupList.Count > 0)
{
_draggingGroupList.Clear();
_draggingItem = null;
var tmpItem = ContainerFromItem(_originalDragContent.Content) as CatrobatListViewItem;
GroupItem(tmpItem);
}
}
}
