public override void OnMouseMove(MouseActionEventArgs e)
{
base.OnMouseMove(e);
Resolved = Resolved && Source != null;
if (Resolved && (e.Button != MouseActionButtons.Left))
{
EndAction();
}
if (Resolved && !Dragging)
{
Dragging = true;
InprocDragDrop.Dragging = true;
InprocDragDrop.Data = new GraphCursor <IVisual, IVisualEdge>(Scene.Graph, Source);
try {
var startData =
new DragStartData(
DragDropViz.TransferDataOfVisual(Scene.Graph, Source),
DragDropAction.All,
GetDragImageBackend(Scene.Graph, Source),
e.Location.X, e.Location.Y);
DragDropHandler.DragStart(startData);
} catch {} finally {
EndAction();
}
}
}
public virtual void Paste()
{
var scene = this.Scene;
IVisual item = null;
#if TRACE
Trace.WriteLine($"{this.GetType ().Name}.{nameof(Paste)}:\t" + string.Join(" | ", Clipboard.GetTypesAvailable().Select(f => f.Id)));
#endif
if (InprocDragDrop.ClipboardData != null)
{
// TODO: refactor to use same code as above
var source = InprocDragDrop.ClipboardData as GraphCursor <IVisual, IVisualEdge>;
if (source != null && source.Cursor != item)
{
item = Mesh.LookUp(source.Graph, scene.Graph, source.Cursor);
if (item == null)
{
//TODO: error here
//return;
}
}
}
if (item == null)
{
item = DragDropViz.VisualOfTransferData(scene.Graph, Clipboard.GetTransferData(Clipboard.GetTypesAvailable())); //DragDropViz.DataManager.DataTypes));
}
if (item != null)
{
SceneExtensions.PlaceVisual(scene, scene.Focused, item, Layout);
}
}
public virtual void Copy()
{
if (false)
{
// TODO: it has to be cleared, if the next stuff is copied into clipboard
// a clipboard Pasted-Event is needed
InprocDragDrop.ClipboardData = new GraphCursor <IVisual, IVisualEdge>(Scene.Graph, Scene.Focused);
}
if (Scene.Focused == null)
{
Registry.Pooled <IMessageBoxShow> ().Show("Warning", "Select something to copy", MessageBoxButtons.Ok);
return;
}
Clipboard.SetTransferData(DragDropViz.TransferDataOfVisual(Scene.Graph, Scene.Focused));
}
public override void Dropped(DragEventArgs e)
{
var pt = Camera.ToSource(e.Position);
var scene = this.Scene;
var target = scene.Hovered ?? HitTestFocused(e.Position);
IVisual item = null;
if (Dragging && Dropping)
{
// the current Drop has started in this instance
// so we make a link
if (target != null && Source != target)
{
SceneExtensions.CreateEdge(scene, Source, target);
}
e.Success = true;
return;
}
if (InprocDragDrop.Dragging)
{
var source = InprocDragDrop.Data as GraphCursor <IVisual, IVisualEdge>;
if (source != null && source.Cursor != target)
{
item = Mesh.LookUp(source.Graph, scene.Graph, source.Cursor);
if (item == null)
{
//TODO: error here
//return;
}
}
}
if (item == null)
{
item = DragDropViz.VisualOfTransferData(scene.Graph, e.Data);
if (item != null)
{
item.Location = pt;
}
}
if (item != null)
{
SceneExtensions.AddItem(scene, item, Layout, pt);
if (target != null && !scene.Graph.Edges(target).Any(edge => edge.Leaf == item || edge.Root == item))
{
SceneExtensions.CreateEdge(scene, target, item);
}
}
else
{
// no known type found to import
string dt = "not found:\t";
}
InprocDragDrop.Data = null;
InprocDragDrop.Dragging = false;
Dragging = false;
}
public override TransferDataSource GetTransferData()
{
return(DragDropViz.TransferDataOfVisual(this.Scene.Graph, this.Scene.Focused));
}