private void OnMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
WorkspaceViewModel wvm = (DataContext as WorkspaceViewModel);
if (this.snappedPort != null)
wvm.HandlePortClicked(this.snappedPort);
else
{
wvm.HandleLeftButtonDown(workBench, e);
}
// if selection is going to be dragged and ctrl is pressed
if (wvm.IsDragging && Keyboard.Modifiers == ModifierKeys.Control)
{
initialMousePosition = e.GetPosition(WorkspaceElements);
// disable clearing selection while dragged data is being generated
// new AnnotationViewModel unnecessarily clears selection
DynamoSelection.Instance.ClearSelectionDisabled = true;
var selection = DynamoSelection.Instance.Selection;
var nodes = selection.OfType<NodeModel>();
var notes = selection.OfType<NoteModel>();
var annotations = selection.OfType<AnnotationModel>();
var connectors = nodes.SelectMany(n =>
n.OutPorts.SelectMany(port => port.Connectors)
.Where(c => c.End != null && c.End.Owner.IsSelected)).Distinct();
// set list of selected viewmodels
draggedData = connectors.Select(c => (ViewModelBase)new ConnectorViewModel(ViewModel, c))
.Concat(notes.Select(n => new NoteViewModel(ViewModel, n)))
.Concat(annotations.Select(a => new AnnotationViewModel(ViewModel, a)))
.Concat(nodes.Select(n =>
{
var nodeRect = this.ChildrenOfType<NodeView>()
.First(view => view.ViewModel.NodeModel == n).nodeBorder;
var size = new Size(nodeRect.ActualWidth, nodeRect.ActualHeight);
// set fixed size for dragged nodes,
// so that they will correspond to origin nodes
return new NodeViewModel(ViewModel, n, size);
})).ToList();
var mouse = e.GetPosition(WorkspaceElements);
var locatableModels = nodes.Concat<ModelBase>(notes);
var minX = locatableModels.Any() ? locatableModels.Min(mb => mb.X) : 0;
var minY = locatableModels.Any() ? locatableModels.Min(mb => mb.Y) : 0;
// compute offset to correctly place selected items right under mouse cursor
var mouseOffset = new Point2D(mouse.X - minX, mouse.Y - minY);
DynamoSelection.Instance.ClearSelectionDisabled = false;
DragDrop.DoDragDrop(this, mouseOffset, DragDropEffects.Copy);
// end dragging operation by setting State from DragSetup to None
ViewModel.HandleMouseRelease(workBench, e);
// remove dragged selection view
if (draggedAdorner != null)
{
draggedData = null;
draggedAdorner.Detach();
draggedAdorner = null;
}
}
InCanvasSearchBar.IsOpen = false;
}
protected override void OnDragOver(DragEventArgs e)
{
var currentPosition = e.GetPosition(WorkspaceElements);
// create adorner if it is necessary
if (draggedAdorner == null)
{
var adornerLayer = AdornerLayer.GetAdornerLayer(WorkspaceElements);
draggedAdorner = new DraggedAdorner(draggedData,
draggedSelectionTemplate, WorkspaceElements, adornerLayer);
}
var zoom = ViewModel.Zoom;
var xOffset = currentPosition.X - initialMousePosition.X;
var yOffset = currentPosition.Y - initialMousePosition.Y;
// compute (x; y) so that dragged selection has mouse cursor
// in the same place as origin selection does
var x = xOffset * zoom;
var y = yOffset * zoom;
// compute bounds of dragged content so that it does not go outside dragged canvas
var x1 = -ViewModel.Model.X/zoom - xOffset;
var y1 = -ViewModel.Model.Y/zoom - yOffset;
var x2 = WorkspaceElements.RenderSize.Width / zoom;
var y2 = WorkspaceElements.RenderSize.Height / zoom;
var bounds = new Rect(x1, y1, x2, y2);
draggedAdorner.SetPosition(x, y, bounds);
}
/// <summary>
/// Drag and drop nodes, notes, annotations and connectors.
/// </summary>
/// <param name="mouse">Relative position to WorkspaceElements</param>
private void DragAndDrop(Point mouse)
{
// disable clearing selection while dragged data is being generated
// new AnnotationViewModel unnecessarily clears selection
DynamoSelection.Instance.ClearSelectionDisabled = true;
var selection = DynamoSelection.Instance.Selection;
var nodes = selection.OfType<NodeModel>();
var notes = selection.OfType<NoteModel>();
var annotations = selection.OfType<AnnotationModel>();
var connectors = nodes.SelectMany(n =>
n.OutPorts.SelectMany(port => port.Connectors)
.Where(c => c.End != null && c.End.Owner.IsSelected)).Distinct();
// set list of selected viewmodels
draggedData = connectors.Select(c => (ViewModelBase)new ConnectorViewModel(ViewModel, c))
.Concat(notes.Select(n => new NoteViewModel(ViewModel, n)))
.Concat(annotations.Select(a => new AnnotationViewModel(ViewModel, a)))
.Concat(nodes.Select(n =>
{
var node = this.ChildrenOfType<NodeView>()
.FirstOrDefault(view => view.ViewModel.NodeModel == n);
if (node == null) return new NodeViewModel(ViewModel, n);
var nodeRect = node.nodeBorder;
var size = new Size(nodeRect.ActualWidth, nodeRect.ActualHeight);
// set fixed size for dragged nodes,
// so that they will correspond to origin nodes
return new NodeViewModel(ViewModel, n, size);
})).ToList();
var locatableModels = nodes.Concat<ModelBase>(notes);
var minX = locatableModels.Any() ? locatableModels.Min(mb => mb.X) : 0;
var minY = locatableModels.Any() ? locatableModels.Min(mb => mb.Y) : 0;
// compute offset to correctly place selected items right under mouse cursor
var mouseOffset = new Point2D(mouse.X - minX, mouse.Y - minY);
DynamoSelection.Instance.ClearSelectionDisabled = false;
DragDrop.DoDragDrop(this, mouseOffset, DragDropEffects.Copy);
// remove dragged selection view
if (draggedAdorner != null)
{
draggedData = null;
draggedAdorner.Detach();
draggedAdorner = null;
}
}
