private static void OnRecognizing(LongPressGestureRecognizer recognizer, UITableView tableView, ViewCell cell)
{
NSIndexPath indexPath = tableView.IndexPathForRowAtPoint(recognizer.LocationInView(tableView));
switch (recognizer.State)
{
case UIGestureRecognizerState.Began:
if (indexPath != null)
{
// Remember the source row
recognizer.sourceIndexPath = indexPath;
recognizer.destinationIndexPath = indexPath;
cell.View.BackgroundColor = Color.Gray;
}
break;
case UIGestureRecognizerState.Changed:
if ((recognizer.destinationIndexPath != null) && (indexPath != null) && (recognizer.destinationIndexPath != indexPath))
{
// Dragged to a new row location, so show it to the user with animation
tableView.MoveRow(recognizer.destinationIndexPath, indexPath);
recognizer.destinationIndexPath = indexPath;
}
break;
case UIGestureRecognizerState.Cancelled:
case UIGestureRecognizerState.Failed:
recognizer.sourceIndexPath = null;
cell.View.BackgroundColor = Color.Transparent;
break;
case UIGestureRecognizerState.Recognized:
// Move the data source finally
if ((recognizer.sourceIndexPath != null) && (recognizer.destinationIndexPath != null) && (recognizer.sourceIndexPath != recognizer.destinationIndexPath))
{
// Reset the move because otherwise the underneath control will get out of sync with
// the Xamarin.Forms element. The next line will drive the real change from ItemsSource
tableView.MoveRow(recognizer.destinationIndexPath, recognizer.sourceIndexPath);
tableView.Source.MoveRow(tableView, recognizer.sourceIndexPath, recognizer.destinationIndexPath);
}
recognizer.sourceIndexPath = null;
recognizer.destinationIndexPath = null;
cell.View.BackgroundColor = Color.Transparent;
break;
}
}
private static void OnRecognizing(LongPressGestureRecognizer recognizer, UITableView tableView, ViewCell cell)
{
NSIndexPath indexPath = tableView.IndexPathForRowAtPoint(recognizer.LocationInView(tableView));
switch (recognizer.State)
{
case UIGestureRecognizerState.Began:
tableView.ScrollEnabled = false;
if (indexPath != null)
{
// Remember the source row
sourceIndexPath = indexPath;
destinationIndexPath = indexPath;
var selectedCell = tableView.CellAt(indexPath);
UIGraphics.BeginImageContext(selectedCell.ContentView.Bounds.Size);
selectedCell.ContentView.Layer.RenderInContext(UIGraphics.GetCurrentContext());
UIImage img = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
UIImageView iv = new UIImageView(img);
dragAndDropView = new UIView();
dragAndDropView.Frame = iv.Frame;
dragAndDropView.Add(iv);
//dragAndDropView.BackgroundColor = UIColor.Blue;
sourceTableView = tableView;
UIApplication.SharedApplication.KeyWindow.Add(dragAndDropView);
dragAndDropView.Center = recognizer.LocationInView(UIApplication.SharedApplication.KeyWindow);
dragAndDropView.AddGestureRecognizer(selectedCell.GestureRecognizers [0]);
}
break;
case UIGestureRecognizerState.Changed:
dragAndDropView.Center = recognizer.LocationInView(UIApplication.SharedApplication.KeyWindow);
destinationIndexPath = indexPath;
break;
case UIGestureRecognizerState.Cancelled:
case UIGestureRecognizerState.Failed:
sourceIndexPath = null;
cell.View.BackgroundColor = Color.Transparent;
break;
case UIGestureRecognizerState.Ended:
if (dragAndDropView == null)
{
return;
}
dragAndDropView.RemoveFromSuperview();
dragAndDropView = null;
UIView view = UIApplication.SharedApplication.KeyWindow;
UIView viewHit = view.HitTest(recognizer.LocationInView(view), null);
int removeLocation = (int)sourceIndexPath.Item;
int insertLocation = destinationIndexPath != null ? (int)destinationIndexPath.Item : -1;
UITableView destinationTableView = viewHit as UITableView;
if (viewHit is UITableView)
{
destinationTableView = viewHit as UITableView;
}
else
{
while (!(viewHit is UITableViewCell) && viewHit != null)
{
viewHit = viewHit.Superview;
}
UIView tempView = viewHit?.Superview;
while (!(tempView is UITableView) && tempView != null)
{
tempView = tempView.Superview;
}
if (tempView != null)
{
destinationTableView = tempView as UITableView;
insertLocation = (int)destinationTableView.IndexPathForCell((UITableViewCell)viewHit).Item;
}
}
if (destinationTableView != null)
{
if (DragAndDropListViewRenderer.ListMap.ContainsKey(tableView.Tag.ToString()) && DragAndDropListViewRenderer.ListMap.ContainsKey(destinationTableView.Tag.ToString()))
{
var sourceList = (IList)DragAndDropListViewRenderer.ListMap [tableView.Tag.ToString()].Item2;
var destinationList = (IList)DragAndDropListViewRenderer.ListMap [destinationTableView.Tag.ToString()].Item2;
if (!tableView.Tag.Equals(destinationTableView.Tag) || removeLocation != insertLocation)
{
if (sourceList.Contains(cell.BindingContext))
{
sourceList.Remove(cell.BindingContext);
if (insertLocation != -1)
{
destinationList.Insert(insertLocation, cell.BindingContext);
}
else
{
destinationList.Add(cell.BindingContext);
}
}
tableView.ReloadData();
destinationTableView.ReloadData();
}
}
}
tableView.ScrollEnabled = true;
break;
}
}
protected override void HandleLongPressGesture()
{
switch (LongPressGestureRecognizer.State)
{
case UIGestureRecognizerState.Began:
{
// we try to grab the current seelected item and draw a floating copy of it on the Drag Surface
// the copy is just an image of it using RasterizedImage
var currentIndexPath = CollectionView.IndexPathForItemAtPoint(LongPressGestureRecognizer.LocationInView(CollectionView));
SelectedItemIndexPath = currentIndexPath;
if (SelectedItemIndexPath == null)
{
return;
}
if (!DataSource.CanMoveItemAtIndexPath(SelectedItemIndexPath))
{
return;
}
var collectionViewCell = CollectionView.CellForItem(SelectedItemIndexPath);
var tpoint = DragSurface.ConvertPointFromView(collectionViewCell.Frame.Location, CollectionView);
RectangleF frame = new RectangleF(tpoint.X, tpoint.Y, collectionViewCell.Frame.Size.Width, collectionViewCell.Frame.Size.Height);
CurrentView = new UIView(frame);
collectionViewCell.Highlighted = true;
var highlightedImageView = new UIImageView(RastertizedImage(collectionViewCell));
highlightedImageView.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
highlightedImageView.Alpha = 1.0f;
collectionViewCell.Highlighted = false;
var imageView = new UIImageView(RastertizedImage(collectionViewCell));
imageView.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
imageView.Alpha = 0.0f;
CurrentView.AddSubview(imageView);
CurrentView.AddSubview(highlightedImageView);
DragSurface.AddSubview(CurrentView); // add this to the top level view so that we can drag outside
CurrentViewCenter = CurrentView.Center;
OnWillBeginDraggingItem(SelectedItemIndexPath);
// we animate the drawing out of the floating copy
UIView.Animate(0.3, 0.0, UIViewAnimationOptions.BeginFromCurrentState,
() =>
{
CurrentView.Transform = CGAffineTransform.MakeScale(1.1f, 1.1f);
highlightedImageView.Alpha = 0.0f;
imageView.Alpha = 1.0f;
},
() =>
{
highlightedImageView.RemoveFromSuperview();
OnDidBegingDraggingItem(SelectedItemIndexPath);
});
InvalidateLayout();
}
break;
case UIGestureRecognizerState.Cancelled:
case UIGestureRecognizerState.Ended:
{
var currentIndexPath = SelectedItemIndexPath;
if (currentIndexPath == null || CurrentView == null)
{
return;
}
SelectedItemIndexPath = null;
CurrentViewCenter = PointF.Empty;
OnWillEndDraggingItem(currentIndexPath);
UIView.Animate(0.3, 0.0, UIViewAnimationOptions.BeginFromCurrentState,
() =>
{
var layoutAttributes = this.LayoutAttributesForItem(currentIndexPath);
CurrentView.Transform = CGAffineTransform.MakeScale(1.0f, 1.0f);
CurrentView.Center = CollectionView.ConvertPointToView(layoutAttributes.Center, DragSurface);
},
() =>
{
CurrentView.RemoveFromSuperview();
CurrentView = null;
InvalidateLayout();
OnDidEndDraggingItem(currentIndexPath);
});
}
break;
}
}
protected override void HandleLongPressGesture()
{
switch (LongPressGestureRecognizer.State)
{
case UIGestureRecognizerState.Began:
{
// we get the current item and draw a floating copy on it on the Collection View, so that it cannot be taken outside the bounds of the collection view
// we get the copy usign RasterizedImage
var currentIndexPath = CollectionView.IndexPathForItemAtPoint(LongPressGestureRecognizer.LocationInView(CollectionView));
SelectedItemIndexPath = currentIndexPath;
if (SelectedItemIndexPath == null)
{
return;
}
if (!DataSource.CanMoveItemAtIndexPath(SelectedItemIndexPath))
{
return;
}
var collectionViewCell = CollectionView.CellForItem(SelectedItemIndexPath);
CurrentView = new UIView(collectionViewCell.Frame);
collectionViewCell.Highlighted = true;
var highlightedImageView = new UIImageView(RastertizedImage(collectionViewCell));
highlightedImageView.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
highlightedImageView.Alpha = 1.0f;
collectionViewCell.Highlighted = false;
var imageView = new UIImageView(RastertizedImage(collectionViewCell));
imageView.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
imageView.Alpha = 0.0f;
CurrentView.AddSubview(imageView);
CurrentView.AddSubview(highlightedImageView);
CollectionView.AddSubview(CurrentView);
CurrentViewCenter = CurrentView.Center;
OnWillBeginDraggingItem(SelectedItemIndexPath);
// animate the floating copy into existence
UIView.Animate(0.3, 0.0, UIViewAnimationOptions.BeginFromCurrentState,
() =>
{
CurrentView.Transform = CGAffineTransform.MakeScale(1.1f, 1.1f);
highlightedImageView.Alpha = 0.0f;
imageView.Alpha = 1.0f;
},
() =>
{
highlightedImageView.RemoveFromSuperview();
OnDidBegingDraggingItem(SelectedItemIndexPath);
});
InvalidateLayout();
}
break;
case UIGestureRecognizerState.Cancelled:
case UIGestureRecognizerState.Ended:
{
var currentIndexPath = SelectedItemIndexPath;
if (currentIndexPath == null)
{
return;
}
SelectedItemIndexPath = null;
CurrentViewCenter = PointF.Empty;
OnWillEndDraggingItem(currentIndexPath);
UIView.Animate(0.3, 0.0, UIViewAnimationOptions.BeginFromCurrentState,
() =>
{
var layoutAttributes = LayoutAttributesForItem(currentIndexPath);
CurrentView.Transform = CGAffineTransform.MakeScale(1.0f, 1.0f);
CurrentView.Center = layoutAttributes.Center;
},
() =>
{
CurrentView.RemoveFromSuperview();
CurrentView = null;
InvalidateLayout();
OnDidEndDraggingItem(currentIndexPath);
});
}
break;
}
}
private static void OnRecognizing(LongPressGestureRecognizer recognizer, UITableView tableView, ViewCell cell)
{
NSIndexPath indexPath = tableView.IndexPathForRowAtPoint(recognizer.LocationInView(tableView));
switch (recognizer.State)
{
case UIGestureRecognizerState.Began:
if (indexPath != null)
{
// Remember the source row
recognizer.sourceIndexPath = indexPath;
recognizer.destinationIndexPath = indexPath;
cell.View.BackgroundColor = Color.Gray;
}
break;
case UIGestureRecognizerState.Changed:
if (recognizer.destinationIndexPath != null && indexPath != null && recognizer.destinationIndexPath != indexPath)
{
// Dragged to a new row location, so show it to the user with animation
tableView.MoveRow(recognizer.destinationIndexPath, indexPath);
recognizer.destinationIndexPath = indexPath;
}
break;
case UIGestureRecognizerState.Cancelled:
case UIGestureRecognizerState.Failed:
recognizer.sourceIndexPath = null;
cell.View.BackgroundColor = Color.Transparent;
break;
case UIGestureRecognizerState.Recognized:
// Move the data source finally
if (recognizer.sourceIndexPath != null && recognizer.destinationIndexPath != null && recognizer.sourceIndexPath != recognizer.destinationIndexPath)
{
// Reset the move because otherwise the underneath control will get out of sync with
// the Xamarin.Forms element. The next line will drive the real change from ItemsSource
tableView.MoveRow(recognizer.destinationIndexPath, recognizer.sourceIndexPath);
tableView.Source.MoveRow(tableView, recognizer.sourceIndexPath, recognizer.destinationIndexPath);
}
recognizer.sourceIndexPath = null;
recognizer.destinationIndexPath = null;
cell.View.BackgroundColor = Color.Transparent;
break;
}
}
private static void OnRecognizing(LongPressGestureRecognizer recognizer, UITableView tableView, ViewCell cell)
{
try
{
NSIndexPath indexPath = tableView.IndexPathForRowAtPoint(recognizer.LocationInView(tableView));
Items = AppData.PropertyModel.SelectedAction.Action.Paragraphs;
if (indexPath != null)
{
if (VisitActionDetailsPage.CurrentInstance.IsEditable)
{
if (!VisitActionDetailsPage.CurrentInstance.SingleTypeCode.Contains(Items[(int)indexPath.LongRow].ParagraphType))
{
switch (recognizer.State)
{
case UIGestureRecognizerState.Began:
tableView.ScrollEnabled = false;
if (indexPath != null)
{
// Remember the source row
sourceIndexPath = indexPath;
destinationIndexPath = indexPath;
var selectedCell = tableView.CellAt(indexPath);
UIGraphics.BeginImageContext(selectedCell.ContentView.Bounds.Size);
selectedCell.ContentView.Layer.RenderInContext(UIGraphics.GetCurrentContext());
UIImage img = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
UIImageView iv = new UIImageView(img);
dragAndDropView = new UIView();
dragAndDropView.Frame = iv.Frame;
dragAndDropView.Add(iv);
//dragAndDropView.BackgroundColor = UIColor.Blue;
sourceTableView = tableView;
UIApplication.SharedApplication.KeyWindow.Add(dragAndDropView);
dragAndDropView.Center = recognizer.LocationInView(UIApplication.SharedApplication.KeyWindow);
dragAndDropView.AddGestureRecognizer(selectedCell.GestureRecognizers[0]);
}
break;
case UIGestureRecognizerState.Changed:
dragAndDropView.Center = recognizer.LocationInView(UIApplication.SharedApplication.KeyWindow);
destinationIndexPath = indexPath;
break;
case UIGestureRecognizerState.Cancelled:
case UIGestureRecognizerState.Failed:
sourceIndexPath = null;
cell.View.BackgroundColor = Color.Transparent;
break;
case UIGestureRecognizerState.Ended:
if (dragAndDropView == null)
{
return;
}
dragAndDropView.RemoveFromSuperview();
dragAndDropView = null;
UIView view = UIApplication.SharedApplication.KeyWindow;
UIView viewHit = view.HitTest(recognizer.LocationInView(view), null);
int removeLocation = (int)sourceIndexPath.Item;
int insertLocation = destinationIndexPath != null ? (int)destinationIndexPath.Item : -1;
while (!(viewHit is UITableViewCell) && viewHit != null)
{
viewHit = viewHit.Superview;
}
UIView tempView = viewHit?.Superview;
while (!(tempView is UITableView) && tempView != null)
{
tempView = tempView.Superview;
}
insertLocation = (int)tableView.IndexPathForCell((UITableViewCell)viewHit).Item;
if (CustomTableViewRenderer.ListMap.ContainsKey(tableView.Tag.ToString()))
{
var sourceList = (IList)CustomTableViewRenderer.ListMap[tableView.Tag.ToString()].Item2;
if (!tableView.Tag.Equals(tableView.Tag) || removeLocation != insertLocation)
{
if (Items[removeLocation].ParagraphType == Items[insertLocation].ParagraphType)
{
if (sourceList.Contains(cell.BindingContext))
{
sourceList.Remove(cell.BindingContext);
if (insertLocation != -1)
{
sourceList.Insert(insertLocation, cell.BindingContext);
}
else
{
sourceList.Add(cell.BindingContext);
}
}
tableView.ReloadData();
}
}
}
VisitActionDetailsPage.CurrentInstance.RefreshList();
tableView.ScrollEnabled = true;
break;
}
}
else
{
dragAndDropView.RemoveFromSuperview();
VisitActionDetailsPage.CurrentInstance.RefreshList();
}
}
}
else
{
dragAndDropView.RemoveFromSuperview();
VisitActionDetailsPage.CurrentInstance.RefreshList();
}
}
catch (Exception ex)
{
Debug.WriteLine("==={0}===", ex.Message);
}
}
