Hi

Getting some strange behaviour when the diagram resizes, in 2 scenarios, both where a diagram is contained within a scrollviewer.

1. Diagram.ResizeToFitItems() - causes the diagram to "snap-scroll" to the top left, effectively re-setting scrol bar values to 1

2. When resizing a control on the diagram, with the diagram set to automatically expand if its bounds are breached, the diagram will "snap-scroll" again to top left (but with the added inconvienience that this happens while the left mouse button is still depressed, causing the control being resized to be turned inside-out becuse the snap-scroll action has caused the pointer to be at a position that gives the control a negative height & width). The negative values are fine, the "snap-scroll" is the problem

I'm tying to replicate this in a stand alone project, but so far without success. Has anyone else experienced such behaviour?


Thanks

Paul Eden

Hi

XAML:
<ScrollViewer Margin="0,0,5,7" Grid.Row="1" Height="Auto" Width="Auto" Focusable="False" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" d:LayoutOverrides="Width, Height">
<MF:Diagram x:Name="oHypothesisDiagram" ZoomFactor="100" Width="Auto" Height="Auto" MeasureUnit="WpfPoint" Bounds="0,0,640,480" NodesExpandable="False" Background="{DynamicResource FlowBGBrush}" HorizontalAlignment="Left" VerticalAlignment="Top" AllowSelfLoops="False">
<MF:Diagram.LinkPen>
<Pen Brush="#FFFF7A08" Thickness="2"/>
</MF:Diagram.LinkPen>
</MF:Diagram>
</ScrollViewer>


Code Behind:
oHypothesisDiagram.Behavior = Behavior.Custom;
oHypothesisDiagram.CustomBehavior = new BehaviorEx(oHypothesisDiagram);

oHypothesisDiagram.AllowDrop = true;

oHypothesisDiagram.NodeCreating += new NodeValidationEventHandler(oHypothesisDiagram_NodeCreating);
oHypothesisDiagram.LinkCreated += new LinkEventHandler(oHypothesisDiagram_LinkCreated);
oHypothesisDiagram.TreeCollapsed += new NodeEventHandler(oHypothesisDiagram_TreeCollapsed);
oHypothesisDiagram.TreeExpanded += new NodeEventHandler(oHypothesisDiagram_TreeExpanded);
oHypothesisDiagram.NodeModified += new NodeEventHandler(oHypothesisDiagram_NodeModified);
oHypothesisDiagram.LinkDeleted += new LinkEventHandler(oHypothesisDiagram_LinkDeleted);
oHypothesisDiagram.LinkDeleting += new LinkValidationEventHandler(oHypothesisDiagram_LinkDeleting);
oHypothesisDiagram.Background = new SolidColorBrush(Colors.Transparent);
oHypothesisDiagram.RecursiveExpand = true;
oHypothesisDiagram.Clicked += new DiagramEventHandler(oHypothesisDiagram_Clicked);
oHypothesisDiagram.NodeDeleted += new NodeEventHandler(oHypothesisDiagram_NodeDeleted);
oHypothesisDiagram.NodeModifying += new NodeValidationEventHandler(oHypothesisDiagram_NodeModifying);
oHypothesisDiagram.DragEnter += new DragEventHandler(oHypothesisDiagram_DragEnter);
oHypothesisDiagram.Drop += new DragEventHandler(oHypothesisDiagram_Drop);
oHypothesisDiagram.NodeDeleting += new NodeValidationEventHandler(oHypothesisDiagram_NodeDeleting);
oHypothesisDiagram.SizeChanged += new SizeChangedEventHandler(oHypothesisDiagram_SizeChanged);
oHypothesisDiagram.ExpandButtonClicked += new NodeEventHandler(oHypothesisDiagram_ExpandButtonClicked);
oHypothesisDiagram.ExpandButtonAction = ExpandButtonAction.RaiseEvents;
oHypothesisDiagram.CommandBindings.Add(new CommandBinding(ApplicationCommands.Copy, (sender, args) => { DiagramCopy(sender, args); }));
oHypothesisDiagram.CommandBindings.Add(new CommandBinding(ApplicationCommands.Cut, (sender, args) => { DiagramCut(sender, args); }));