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NodeGraphManager.cs
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NodeGraphManager.cs
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using NodeGraph.Model;
using NodeGraph.View;
using NodeGraph.ViewModel;
using PropertyTools.Wpf;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Media;
using System.Xml;
namespace NodeGraph
{
public enum SelectionMode
{
Overlap,
Include,
}
public class NodeGraphManager
{
#region Fields
public static readonly Dictionary<Guid, FlowChart> FlowCharts = new Dictionary<Guid, FlowChart>();
public static readonly Dictionary<Guid, Node> Nodes = new Dictionary<Guid, Node>();
public static readonly Dictionary<Guid, Connector> Connectors = new Dictionary<Guid, Connector>();
public static readonly Dictionary<Guid, NodeFlowPort> NodeFlowPorts = new Dictionary<Guid, NodeFlowPort>();
public static readonly Dictionary<Guid, NodePropertyPort> NodePropertyPorts = new Dictionary<Guid, NodePropertyPort>();
public static readonly Dictionary<Guid, ObservableCollection<Guid>> SelectedNodes = new Dictionary<Guid, ObservableCollection<Guid>>();
public static bool OutputDebugInfo = false;
public static SelectionMode SelectionMode = SelectionMode.Overlap;
#endregion // Fields
#region FlowChart
/// <summary>
/// Create FlowChart with FlowChartViewModel.
/// </summary>
/// <param name="isDeserializing">Is in deserializing routine?
/// If it is true, OnCreate() callback will not be called, otherwise OnDeserialize will be called.</param>
/// <param name="guid">Guid of this FlowChart.</param>
/// <param name="flowChartModelType">Type of FlowChart to be created.</param>
/// <returns>Created FlowChart instance</returns>
public static FlowChart CreateFlowChart( bool isDeserializing, Guid guid, Type flowChartModelType )
{
//------ create FlowChart.
var flowChartAttrs = flowChartModelType.GetCustomAttributes( typeof( FlowChartAttribute ), false ) as FlowChartAttribute[];
if( 1 != flowChartAttrs.Length )
throw new ArgumentException( string.Format( "{0} must have ONE FlowChartAttribute", flowChartModelType.Name ) );
var flowChartAttr = flowChartAttrs[ 0 ];
FlowChart flowChart = Activator.CreateInstance( flowChartModelType, new object[] { guid } ) as FlowChart;
FlowCharts.Add( flowChart.Guid, flowChart );
//----- create viewmodel
flowChart.ViewModel = Activator.CreateInstance( flowChartAttr.ViewModelType, new object[] { flowChart } ) as FlowChartViewModel;
//----- create selection list.
ObservableCollection<Guid> selectionList = new ObservableCollection<Guid>();
selectionList.CollectionChanged += Node_SelectionList_CollectionChanged;
SelectedNodes.Add( flowChart.Guid, selectionList );
//----- invocke create callback.
if( !isDeserializing )
{
flowChart.OnCreate();
}
//----- return.
return flowChart;
}
public static void DestroyFlowChart( Guid guid )
{
FlowChart flowChart;
if( !FlowCharts.TryGetValue( guid, out flowChart ) )
{
return;
}
flowChart.OnPreDestroy();
ObservableCollection<Guid> guids = new ObservableCollection<Guid>();
foreach( var node in flowChart.Nodes )
{
guids.Add( node.Guid );
}
foreach( var nodeGuid in guids )
{
DestroyNode( nodeGuid );
}
if( 0 < flowChart.Connectors.Count )
{
throw new InvalidOperationException( "Connectors are not removed." );
}
flowChart.OnPostDestroy();
SelectedNodes.Remove( guid );
FlowCharts.Remove( guid );
}
public static FlowChart FindFlowChart( Guid guid )
{
FlowChart flowChart;
FlowCharts.TryGetValue( guid, out flowChart );
return flowChart;
}
#endregion // FlowChart
#region Node
/// <summary>
/// Create Node with NodeViewModel.
/// </summary>
/// <param name="isDeserializing">Is in deserializing routine?
/// If it is true, OnCreate() callback will not be called, otherwise OnDeserialize will be called.
/// If it is true, Node's attribute will not be evaluated. That means flows and properties will not be created automatically by attributes.
/// All flows and properties will be created during deserialization process.</param>
/// <param name="guid">Guid for this Node.</param>
/// <param name="flowChart">Owner FlowChart.</param>
/// <param name="nodeType">Type of this node.</param>
/// <param name="x">Location along X axis( Canvas.Left ).</param>
/// <param name="y">Location along Y axis( Canvas.Top )</param>
/// <param name="ZIndex">Z index( Canvas.ZIndex ).</param>
/// <param name="headerOverride">User defined header.</param>
/// <param name="nodeViewModelTypeOverride">NodeViewModel to override.</param>
/// <param name="flowPortViewModelTypeOverride">FlowPortViewModel to override.</param>
/// <param name="propertyPortViewModelTypeOverride">PropertyPortViewmodel to override.</param>
/// <returns>Created node instance.</returns>
public static Node CreateNode( bool isDeserializing, Guid guid, FlowChart flowChart, Type nodeType, double x, double y, int ZIndex,
Type nodeViewModelTypeOverride = null, Type flowPortViewModelTypeOverride = null, Type propertyPortViewModelTypeOverride = null )
{
//----- exceptions.
if( null == flowChart )
throw new ArgumentNullException( "flowChart of CreateNode() can not be null" );
if( null == nodeType )
throw new ArgumentNullException( "nodeType of CreateNode() can not be null" );
//----- create node from NodeAttribute.
var nodeAttrs = nodeType.GetCustomAttributes( typeof( NodeAttribute ), false ) as NodeAttribute[];
if( 1 != nodeAttrs.Length )
throw new ArgumentException( string.Format( "{0} must have ONE NodeAttribute", nodeType.Name ) );
var nodeAttr = nodeAttrs[ 0 ];
// create node model.
Node node = Activator.CreateInstance( nodeType, new object[] { guid, flowChart } ) as Node;
node.X = x;
node.Y = y;
node.ZIndex = ZIndex;
Nodes.Add( guid, node );
// create node viewmodel.
node.ViewModel = Activator.CreateInstance(
( null != nodeViewModelTypeOverride ) ? nodeViewModelTypeOverride : nodeAttr.ViewModelType,
new object[] { node } ) as NodeViewModel;
flowChart.ViewModel.NodeViewModels.Add( node.ViewModel );
flowChart.Nodes.Add( node );
//---- history.
flowChart.History.AddCommand( new NodeGraph.History.CreateNodeCommand(
"Creating node", node.Guid, NodeGraphManager.SerializeNode( node ) ) );
//----- create ports.
if( !isDeserializing )
{
//----- create flowPorts from NodeFlowPortAttribute.
var flowPortAttrs = nodeType.GetCustomAttributes( typeof( NodeFlowPortAttribute ), false ) as NodeFlowPortAttribute[];
foreach( var attr in flowPortAttrs )
{
NodeFlowPort port = CreateNodeFlowPort( false,
Guid.NewGuid(), node, attr.IsInput,
( null != flowPortViewModelTypeOverride ) ? flowPortViewModelTypeOverride : attr.ViewModelType,
attr.Name, attr.DisplayName, attr.AllowMultipleInput, attr.AllowMultipleOutput, attr.IsPortEnabled, attr.IsEnabled );
}
//----- create nodePropertyPorts( property ) from NodePropertyAttribute.
var propertyInfos = nodeType.GetProperties( BindingFlags.Public | BindingFlags.Instance );
foreach( var propertyInfo in propertyInfos )
{
var nodePropertyAttrs = propertyInfo.GetCustomAttributes( typeof( NodePropertyPortAttribute ), false ) as NodePropertyPortAttribute[];
if( null != nodePropertyAttrs )
{
foreach( var attr in nodePropertyAttrs )
{
NodePropertyPort port = CreateNodePropertyPort( false, Guid.NewGuid(), node, attr.IsInput,
attr.ValueType, attr.DefaultValue, propertyInfo.Name, attr.HasEditor,
( null != propertyPortViewModelTypeOverride ) ? propertyPortViewModelTypeOverride : attr.ViewModelType,
attr.DisplayName, attr.AllowMultipleInput, attr.AllowMultipleOutput, attr.IsPortEnabled, attr.IsEnabled );
}
}
}
//----- create nodePropertyPorts( field ) from NodePropertyAttribute.
var fieldInfos = nodeType.GetFields( BindingFlags.Public | BindingFlags.Instance );
foreach( var fieldInfo in fieldInfos )
{
var nodePropertyAttrs = fieldInfo.GetCustomAttributes( typeof( NodePropertyPortAttribute ), false ) as NodePropertyPortAttribute[];
if( null != nodePropertyAttrs )
{
foreach( var attr in nodePropertyAttrs )
{
NodePropertyPort port = CreateNodePropertyPort( false, Guid.NewGuid(), node, attr.IsInput,
attr.ValueType, attr.DefaultValue, fieldInfo.Name, attr.HasEditor,
( null != propertyPortViewModelTypeOverride ) ? propertyPortViewModelTypeOverride : attr.ViewModelType,
attr.DisplayName, attr.AllowMultipleInput, attr.AllowMultipleOutput, attr.IsPortEnabled, attr.IsEnabled );
}
}
}
//----- invoke Create callback.
node.OnCreate();
}
//----- return.
return node;
}
public static void DestroyNode( Guid guid )
{
Node node;
if( Nodes.TryGetValue( guid, out node ) )
{
//----- destroy.
node.OnPreDestroy();
List<Guid> connectorGuids = new List<Guid>();
List<Guid> portGuids = new List<Guid>();
foreach( var port in node.InputFlowPorts )
{
foreach( var connector in port.Connectors )
{
if( !connectorGuids.Contains( connector.Guid ) )
connectorGuids.Add( connector.Guid );
}
portGuids.Add( port.Guid );
}
foreach( var port in node.OutputFlowPorts )
{
foreach( var connector in port.Connectors )
{
if( !connectorGuids.Contains( connector.Guid ) )
connectorGuids.Add( connector.Guid );
}
portGuids.Add( port.Guid );
}
foreach( var port in node.InputPropertyPorts )
{
foreach( var connector in port.Connectors )
{
if( !connectorGuids.Contains( connector.Guid ) )
connectorGuids.Add( connector.Guid );
}
portGuids.Add( port.Guid );
}
foreach( var port in node.OutputPropertyPorts )
{
foreach( var connector in port.Connectors )
{
if( !connectorGuids.Contains( connector.Guid ) )
connectorGuids.Add( connector.Guid );
}
portGuids.Add( port.Guid );
}
foreach( var connectorGuid in connectorGuids )
{
DestroyConnector( connectorGuid );
}
foreach( var portGuid in portGuids )
{
DestroyNodePort( portGuid );
}
FlowChart flowChart = node.Owner;
flowChart.ViewModel.NodeViewModels.Remove( node.ViewModel );
flowChart.Nodes.Remove( node );
ObservableCollection<Guid> selectionList = GetSelectionList( node.Owner );
selectionList.Remove( guid );
node.OnPostDestroy();
node.Owner.History.AddCommand( new NodeGraph.History.DestroyNodeCommand(
"Destroying node", SerializeNode( node ), node.Guid ) );
Nodes.Remove( guid );
}
}
public static Node FindNode( Guid guid )
{
Node node;
Nodes.TryGetValue( guid, out node );
return node;
}
public static List<Node> FindNode( FlowChart flowChart, string header )
{
List<Node> nodes = new List<Node>();
foreach( var pair in Nodes )
{
Node node = pair.Value;
if( ( flowChart == node.Owner ) && ( header == node.Header ) )
{
nodes.Add( node );
}
}
return nodes;
}
#endregion // Node
#region RouterNode
public static Node CreateRouterNode( Guid guid, FlowChart flowChart, NodePort referencePort, double X, double Y, int ZIndex,
Type nodeViewModelTypeOverride = null, Type flowPortViewModelTypeOverride = null, Type propertyPortViewModelTypeOverride = null )
{
if( null == flowChart )
throw new ArgumentNullException( "flowChart of CreateNode() can not be null" );
if( null == referencePort )
throw new ArgumentNullException( "referencePort of CreateNode() can not be null" );
Type portType = referencePort.GetType();
bool isFlowPort = typeof( NodeFlowPort ).IsAssignableFrom( portType );
bool isPropertyPort = typeof( NodePropertyPort ).IsAssignableFrom( portType );
if( !isFlowPort && !isPropertyPort )
throw new ArgumentException( "CreateRouterNode() is only supported for NodeFlowPort or NodePropertyPort" );
Node node = CreateNode( false, guid, flowChart, typeof( Node ), X, Y, ZIndex,
( null == nodeViewModelTypeOverride ) ? typeof( RouterNodeViewModel ) : nodeViewModelTypeOverride,
flowPortViewModelTypeOverride, propertyPortViewModelTypeOverride );
if( isFlowPort )
{
CreateNodeFlowPort( false, Guid.NewGuid(), node, true, flowPortViewModelTypeOverride, "Input", "", false, false, true, true );
CreateNodeFlowPort( false, Guid.NewGuid(), node, false, flowPortViewModelTypeOverride, "Output", "", false, false, true, true );
}
else if( isPropertyPort )
{
NodePropertyPort propertyPort = referencePort as NodePropertyPort;
CreateNodePropertyPort( false, Guid.NewGuid(), node, true, propertyPort.ValueType, propertyPort.Value, "Input", false,
propertyPortViewModelTypeOverride,
"", false, false, true, true );
CreateNodePropertyPort( false, Guid.NewGuid(), node, false, propertyPort.ValueType, propertyPort.Value, "Output", false,
propertyPortViewModelTypeOverride,
"", false, false, true, true );
}
return node;
}
public static Node CreateRouterNodeForConnector( Guid guid, FlowChart flowChart, Connector connector, double X, double Y, int ZIndex )
{
NodePort startPort = connector.StartPort;
NodePort endPort = connector.EndPort;
DestroyConnector( connector.Guid );
Node node = CreateRouterNode( guid, flowChart, startPort, X, Y, ZIndex );
BeginConnection( startPort );
if( startPort is NodeFlowPort )
{
EndConnection( node.InputFlowPorts[ 0 ] );
BeginConnection( node.OutputFlowPorts[ 0 ] );
}
else
{
EndConnection( node.InputPropertyPorts[ 0 ] );
BeginConnection( node.OutputPropertyPorts[ 0 ] );
}
EndConnection( endPort );
return node;
}
#endregion // RouterNode
#region Connector
public static Connector CreateConnector( bool isDeserializing, Guid guid, FlowChart flowChart, Type connectorType = null )
{
//----- exceptions.
if( null == flowChart )
throw new ArgumentNullException( "flowChart of CreateNode() can not be null" );
//------ create connector.
if( null == connectorType )
connectorType = typeof( Connector );
var connectorAttrs = connectorType.GetCustomAttributes( typeof( ConnectorAttribute ), false ) as ConnectorAttribute[];
if( 1 != connectorAttrs.Length )
throw new ArgumentException( string.Format( "{0} must have ONE ConnectorAttribute", connectorType.Name ) );
var connectorAttr = connectorAttrs[ 0 ];
Connector connector = Activator.CreateInstance( connectorType, new object[] { guid, flowChart } ) as Connector;
Connectors.Add( connector.Guid, connector );
//----- create viewmodel
connector.ViewModel = Activator.CreateInstance( connectorAttr.ViewModelType, new object[] { connector } ) as ConnectorViewModel;
flowChart.ViewModel.ConnectorViewModels.Add( connector.ViewModel );
flowChart.Connectors.Add( connector );
//----- invoke Create callback.
if( !isDeserializing )
{
connector.OnCreate();
}
//----- return.
return connector;
}
public static void DestroyConnector( Guid guid )
{
Connector connector;
if( Connectors.TryGetValue( guid, out connector ) )
{
//----- history.
connector.FlowChart.History.AddCommand( new NodeGraph.History.DestroyConnectorCommand(
"Destroying connector", SerializeConnector( connector ), connector.Guid ) );
//----- destroy.
connector.OnPreDestroy();
if( null != connector.StartPort )
{
DisconnectFrom( connector.StartPort, connector );
}
if( null != connector.EndPort )
{
DisconnectFrom( connector.EndPort, connector );
}
FlowChart flowChart = connector.FlowChart;
flowChart.ViewModel.ConnectorViewModels.Remove( connector.ViewModel );
flowChart.Connectors.Remove( connector );
connector.OnPostDestroy();
Connectors.Remove( guid );
}
}
public static Connector FindConnector( Guid guid )
{
Connector connector;
Connectors.TryGetValue( guid, out connector );
return connector;
}
#endregion // Connector
#region Port
public static NodePort FindNodePort( Guid guid )
{
NodePort port = FindNodeFlowPort( guid );
if( null == port )
port = FindNodePropertyPort( guid );
return port;
}
public static void DestroyNodePort( Guid guid )
{
// ---- exception.
NodePort port = FindNodePort( guid );
if( null == port )
{
return;
}
//----- history.
Node node = port.Owner;
node.Owner.History.AddCommand( new History.DestroyNodePortCommand(
"Destroying port", SerializeNodePort( port ), port.Guid ) );
//----- destroy.
bool isFlowPort = ( port is NodeFlowPort );
port.OnPreDestroy();
List<Guid> guids = new List<Guid>();
foreach( var connector in port.Connectors )
{
guids.Add( connector.Guid );
}
foreach( var connectorGuid in guids )
{
DestroyConnector( connectorGuid );
}
if( port.IsInput )
{
node.ViewModel.InputFlowPortViewModels.Remove( port.ViewModel as NodeFlowPortViewModel );
if( isFlowPort )
node.InputFlowPorts.Remove( port as NodeFlowPort );
else
node.InputPropertyPorts.Remove( port as NodePropertyPort );
}
else
{
node.ViewModel.OutputFlowPortViewModels.Remove( port.ViewModel as NodeFlowPortViewModel );
if( isFlowPort )
node.OutputFlowPorts.Remove( port as NodeFlowPort );
else
node.OutputPropertyPorts.Remove( port as NodePropertyPort );
}
port.OnPostDestroy();
if( isFlowPort )
NodeFlowPorts.Remove( guid );
else
NodePropertyPorts.Remove( guid );
}
private static void FindConnectedPortsInternal( NodePort port, List<NodePort> outConnectedPorts )
{
if( null == port )
{
return;
}
if( 0 < port.Connectors.Count )
{
if( port.IsInput )
{
foreach( var connector in port.Connectors )
{
NodePort nextPort = connector.StartPort;
Node nextNode = nextPort.Owner;
if( nextNode.ViewModel is RouterNodeViewModel )
{
if( nextPort is NodePropertyPort )
{
FindConnectedPortsInternal( nextNode.InputPropertyPorts[ 0 ], outConnectedPorts );
}
else if( nextPort is NodeFlowPort )
{
FindConnectedPortsInternal( nextNode.InputFlowPorts[ 0 ], outConnectedPorts );
}
}
else
{
outConnectedPorts.Add( nextPort );
}
}
}
else
{
foreach( var connector in port.Connectors )
{
NodePort nextPort = connector.EndPort;
Node nextNode = nextPort.Owner;
if( nextNode.ViewModel is RouterNodeViewModel )
{
if( nextPort is NodePropertyPort )
{
FindConnectedPortsInternal( nextNode.OutputPropertyPorts[ 0 ], outConnectedPorts );
}
else if( nextPort is NodeFlowPort )
{
FindConnectedPortsInternal( nextNode.OutputFlowPorts[ 0 ], outConnectedPorts );
}
}
else
{
outConnectedPorts.Add( nextPort );
}
}
}
}
}
public static void FindConnectedPorts( NodePort port, out List<NodePort> outConnectedPorts )
{
outConnectedPorts = new List<NodePort>();
FindConnectedPortsInternal( port, outConnectedPorts );
}
#endregion Port
#region FlowPort
/// <summary>
/// Create NodeFlowPort with NodeFlwoPortViewModel.
/// </summary>
/// <param name="isDeserializing">Is in deserializing routine?
/// If it is true, OnCreate() callback will not be called, otherwise OnDeserialize will be called.</param>
/// <param name="guid">Guid for this port.</param>
/// <param name="node">Owner of this port.</param>
/// <param name="name">Name of port.</param>
/// <param name="displayName">Display name of port.</param>
/// <param name="isInput">Is input port?</param>
/// <param name="allowMultipleInput">Multiple inputs are allowed for this port?</param>
/// <param name="allowMultipleOutput">Multiple outputs are allowed for this port?</param>
/// <param name="portViewModelTypeOverride">ViewModelType to override.</param>
/// <returns>Created NodeFlwoPort instance.</returns>
public static NodeFlowPort CreateNodeFlowPort( bool isDeserializing, Guid guid, Node node, bool isInput, Type portViewModelTypeOverride = null,
string name = "None", string displayName = "None", bool allowMultipleInput = true, bool allowMultipleOutput = false, bool isPortEnabled = true, bool isEnabled = true )
{
//----- exceptions.
if( null == node )
throw new ArgumentNullException( "node of CreateNodeFlowPort() can not be null" );
//----- create port.
// create flowPort model.
NodeFlowPort port = Activator.CreateInstance( typeof( NodeFlowPort ),
new object[] { guid, node, isInput } ) as NodeFlowPort;
port.Name = name;
port.DisplayName = displayName;
port.AllowMultipleInput = allowMultipleInput;
port.AllowMultipleOutput = allowMultipleOutput;
port.IsPortEnabled = isPortEnabled;
port.IsEnabled = isEnabled;
NodeFlowPorts.Add( port.Guid, port );
// create flowPort viewmodel.
var portVM = Activator.CreateInstance( ( null != portViewModelTypeOverride ) ? portViewModelTypeOverride : typeof( NodeFlowPortViewModel ),
new object[] { port } ) as NodeFlowPortViewModel;
// add port to node.
port.ViewModel = portVM;
if( isInput )
{
node.InputFlowPorts.Add( port );
node.ViewModel.InputFlowPortViewModels.Add( portVM );
}
else
{
node.OutputFlowPorts.Add( port );
node.ViewModel.OutputFlowPortViewModels.Add( portVM );
}
//----- invoke Create callback.
if( !isDeserializing )
{
port.OnCreate();
}
//----- history.
node.Owner.History.AddCommand( new History.CreateNodePortCommand(
"Creating port", port.Guid, SerializeNodePort( port ) ) );
//----- return.
return port;
}
public static NodeFlowPort FindNodeFlowPort( Guid guid )
{
NodeFlowPort port;
NodeFlowPorts.TryGetValue( guid, out port );
return port;
}
public static NodeFlowPort FindNodeFlowPort( Node node, string propertyName )
{
foreach( var pair in NodeFlowPorts )
{
NodeFlowPort port = pair.Value;
if( ( node == port.Owner ) && ( propertyName == port.Name ) )
{
return port;
}
}
return null;
}
#endregion // FlowPort
#region PropertyPort
/// <summary>
/// Create PropertyPort with PropertyPortViewModel.
/// </summary>
/// <param name="isDeserializing">Is in deserializing routine?
/// If it is true, OnCreate() callback will not be called, otherwise OnDeserialize will be called.</param>
/// <param name="guid">Guid for this port.</param>
/// <param name="node">Owner of this port.</param>
/// <param name="name">Name of port.</param>
/// <param name="displayName">Display name of port.</param>
/// <param name="isInput">Is input port?</param>
/// <param name="allowMultipleInput">Multiple inputs are allowed for this port?</param>
/// <param name="allowMultipleOutput">Multiple outputs are allowed for this port?</param>
/// <param name="valueType">Type of property value.</param>
/// <param name="defaultValue">Default property value.</param>
// <param name="portViewModelTypeOverride">ViewModelType to override.</param>
/// <returns>Created NodePropertyPort instance.</returns>
public static NodePropertyPort CreateNodePropertyPort( bool isDeserializing, Guid guid, Node node, bool isInput, Type valueType, object defaultValue, string name, bool hasEditor,
Type portViewModelTypeOverride = null, string displayName = "", bool allowMultipleInput = false, bool allowMultipleOutput = true, bool isPortEnabled = true, bool isEnabled = true )
{
//----- exceptions.
if( null == node )
throw new ArgumentNullException( "node of CreateNodePropertyPort() can not be null" );
//----- create port.
// create propertyPort model.
NodePropertyPort port = Activator.CreateInstance( typeof( NodePropertyPort ),
new object[] { guid, node, isInput, valueType, defaultValue, name, hasEditor } ) as NodePropertyPort;
port.DisplayName = displayName;
port.AllowMultipleInput = allowMultipleInput;
port.AllowMultipleOutput = allowMultipleOutput;
port.IsPortEnabled = isPortEnabled;
port.IsEnabled = isEnabled;
NodePropertyPorts.Add( port.Guid, port );
// create propertyPort viewmodel.
var portVM = Activator.CreateInstance( ( null != portViewModelTypeOverride ) ? portViewModelTypeOverride : typeof( NodePropertyPortViewModel ),
new object[] { port } ) as NodePropertyPortViewModel;
port.ViewModel = portVM;
// add to node.
if( port.IsInput )
{
node.InputPropertyPorts.Add( port );
node.ViewModel.InputPropertyPortViewModels.Add( portVM );
}
else
{
node.OutputPropertyPorts.Add( port );
node.ViewModel.OutputPropertyPortViewModels.Add( portVM );
}
//----- invoke Create callback.
if( !isDeserializing )
{
port.OnCreate();
}
//----- history.
node.Owner.History.AddCommand( new History.CreateNodePortCommand(
"Creating port", port.Guid, SerializeNodePort( port ) ) );
//----- return.
return port;
}
public static NodePropertyPort FindNodePropertyPort( Guid guid )
{
NodePropertyPort port;
NodePropertyPorts.TryGetValue( guid, out port );
return port;
}
public static NodePropertyPort FindNodePropertyPort( Node node, string propertyName )
{
foreach( var pair in NodePropertyPorts )
{
NodePropertyPort port = pair.Value;
if( ( node == port.Owner ) && ( propertyName == port.Name ) )
{
return port;
}
}
return null;
}
#endregion // PropertyPort
#region Connection
public static bool IsConnecting { get; private set; }
public static NodePort FirstConnectionPort { get; private set; }
public static Connector CurrentConnector { get; private set; }
public static void ConnectTo( NodePort port, Connector connector )
{
if( port.IsInput )
{
connector.EndPort = port;
}
else
{
connector.StartPort = port;
}
port.Connectors.Add( connector );
port.OnConnect( connector );
connector.OnConnect( port );
}
public static void DisconnectFrom( NodePort port, Connector connector )
{
if( null == port )
return;
connector.OnDisconnect( port );
port.OnDisconnect( connector );
if( port.IsInput )
{
connector.EndPort = null;
}
else
{
connector.StartPort = null;
}
port.Connectors.Remove( connector );
}
public static void DisconnectAll( NodePort port )
{
List<Guid> connectorGuids = new List<Guid>();
foreach( var connection in port.Connectors )
{
connectorGuids.Add( connection.Guid );
}
foreach( var guid in connectorGuids )
{
DestroyConnector( guid );
}
}
public static void BeginConnection( NodePort port )
{
if( IsConnecting )
throw new InvalidOperationException( "You can not connect node during other connection occurs." );
IsConnecting = true;
Node node = port.Owner;
FlowChart flowChart = node.Owner;
FlowChartView flowChartView = flowChart.ViewModel.View;
BeginDragging( flowChartView );
CurrentConnector = CreateConnector( false, Guid.NewGuid(), flowChart, typeof( Connector ) );
ConnectTo( port, CurrentConnector );
FirstConnectionPort = port;
}
public static void SetOtherConnectionPort( NodePort port )
{
if( null == port )
{
if( ( null != CurrentConnector.StartPort ) && ( CurrentConnector.StartPort == FirstConnectionPort ) )
{
if( null != CurrentConnector.EndPort )
{
DisconnectFrom( CurrentConnector.EndPort, CurrentConnector );
}
}
else if( ( null != CurrentConnector.EndPort ) && ( CurrentConnector.EndPort == FirstConnectionPort ) )
{
if( null != CurrentConnector.StartPort )
{
DisconnectFrom( CurrentConnector.StartPort, CurrentConnector );
}
}
}
else
{
ConnectTo( port, CurrentConnector );
}
}
private static List<Node> _AlreadyCheckedNodes;
public static bool CheckIfConnectable( NodePort otherPort, out string error )
{
Type firstType = FirstConnectionPort.GetType();
Type otherType = otherPort.GetType();
Node firstNode = FirstConnectionPort.Owner;
Node otherNode = otherPort.Owner;
error = "";
// same port.
if( FirstConnectionPort == otherPort )
{
//error = "It's a same port.";
return false;
}
// same node.
if( firstNode == otherNode )
{
error = "It's a port of same node.";
return false;
}
bool areAllPropertyPorts = ( typeof( NodePropertyPort ).IsAssignableFrom( firstType ) && typeof( NodePropertyPort ).IsAssignableFrom( otherType ) );
bool areAllFlowPorts = ( typeof( NodeFlowPort ).IsAssignableFrom( firstType ) && typeof( NodeFlowPort ).IsAssignableFrom( otherType ) );
// different type of ports
if( !areAllPropertyPorts && !areAllFlowPorts )
{
error = "Port type is not same with other's.";
return false;
}
// same orientation.
if( FirstConnectionPort.IsInput == otherPort.IsInput )
{
error = "Ports are all input or output.";
return false;
}
// already connectecd.
foreach( var connector in FirstConnectionPort.Connectors )
{
if( connector.StartPort == otherPort )
{
error = "Already connected";
return false;
}
}
// different type of value.
if( areAllPropertyPorts )
{
NodePropertyPort firstPropPort = FirstConnectionPort as NodePropertyPort;
NodePropertyPort otherPropPort = otherPort as NodePropertyPort;
if( !firstPropPort.IsInput )
{
if( !otherPropPort.ValueType.IsAssignableFrom( firstPropPort.ValueType ) )
{
error = "Value type is not assignable";
return false;
}
}
else
{
if( !firstPropPort.ValueType.IsAssignableFrom( otherPropPort.ValueType ) )
{
error = "Value type is not assignable";
return false;
}
}
}
// circular test
if( !otherPort.Owner.AllowCircularConnection )
{
_AlreadyCheckedNodes = new List<Node>();
if( IsReachable(
FirstConnectionPort.IsInput ? firstNode : otherNode,
FirstConnectionPort.IsInput ? otherNode : firstNode ) )