Hi,
In project we have noticed that sometimes for RadDiagram.ConnectionManipulationCompleted we receive unexpected values in event.
This problem is not systematic but it occurs often at the drag of new connection.
To make it reproducible for you I used CustomConnectors sample project from Diagram.
For easier analysis I recorded a video with bug and changes to CustomConnectors project.
Best regards,
Bartosz
NullReferenceException is thrown when trying to save RadDiagram instance that contains a RadDiagramShape with its Geometry assigned to a GeometryGroup value.
To work this around, you can flatten the GeometryGroup before setting the shape's Geometry property. This is done by calling the GetFlattenedPathGeometry() method of the GeometryGroup.
shape.Geometry = group.GetFlattenedPathGeometry();
Most problematic issue when container can contains a container inside of it.
In mvvm demo project i modified load/save button to Clear diagram and display different content.
It works but after few click there is a recurrence call to update Z indices.
The reason to create such combination is to have hierarchy in diagram to display diagram from general view to detailed view.
Hundreds of Connections with ConnectionsBridges turned on in diagram. One on top of the others.
StackOverflowException between updating the Connections' Start/End points.
In a NetCore project, when dragging the diagram from the toolbox into the designer, an exception is thrown inside the designer.
With Visual Studio 2019 Preview v. 16.10.0. Preview 2.0, Net 5 project => when dragging from the ToolBox - the VS goes into a non-responsive state (Vs is busy is shown or the VS crashed and closed automatically).
StackOverflowException is thrown when the Layout() method of RadDiagram is called and the diagram's router is OrgTreeRouter. To reproduce this use TreeLayoutSettings.
To work this around, add bigger HorizontalSeparation and VerticalSeparation for the TreeLayoutSettings. Or disable the connections routing using the RouteConnections property of RadDiagram.
The exception throws when you use RadDiagram in a data binding scenario by populating its GraphSource and you want to draw a shape using the RadDiagramRibbon's ShapeTool.
InvalidOperationException: 'Cannot modify the Items collection when the GraphSource is set.'
To work this around, use the PreviewMouseDown, PreviewMouseMove and PreviewMouseUp events of RadDiagram in order to prevent the default logic executed by the ShapeTool. Then, in the event handlers, implement a custom logic that works with the diagram GraphSource.
private void RadDiagramRibbon_Loaded(object sender, RoutedEventArgs e)
{
var toolService = diagram.ServiceLocator.GetService<IToolService>() as ToolService;
this.shapeTool = (ShapeTool)toolService.ToolList.FirstOrDefault(x => x is ShapeTool);
}
private Point startPoint;
private bool isShapeCreationInProgress;
private MyNode currentShapeModel; // where MyNode derives from NodeViewModelBase and expose an additional Geometry property
private ShapeTool shapeTool;
private void RadDiagram_PreviewMouseDown(object sender, MouseButtonEventArgs e)
{
if (this.shapeTool.IsActive && !this.isShapeCreationInProgress)
{
this.isShapeCreationInProgress = true;
this.startPoint = this.diagram.GetTransformedPoint(e.GetPosition(this.diagram));
this.currentShapeModel = new MyNode()
{
Geometry = this.shapeTool.Geometry,
Position = this.startPoint,
Width = 0,
Height = 0
};
var source = (MyGraphSource)this.diagram.GraphSource;
source.AddNode(this.currentShapeModel);
e.Handled = true;
}
}
private void RadDiagram_PreviewMouseMove(object sender, MouseEventArgs e)
{
if (this.shapeTool.IsActive && this.currentShapeModel != null && this.isShapeCreationInProgress)
{
var transformedPoint = this.diagram.GetTransformedPoint(e.GetPosition(this.diagram));
var width = Math.Abs(this.startPoint.X - transformedPoint.X);
var height = Math.Abs(this.startPoint.Y - transformedPoint.Y);
var x = Math.Min(this.startPoint.X, transformedPoint.X);
var y = Math.Min(this.startPoint.Y, transformedPoint.Y);
this.currentShapeModel.Width = width;
this.currentShapeModel.Height = height;
this.currentShapeModel.Position = new Point(x, y);
e.Handled = true;
}
}
private void RadDiagram_PreviewMouseUp(object sender, MouseButtonEventArgs e)
{
this.isShapeCreationInProgress = false;
e.Handled = true;
}