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namespace System.Workflow.Activities
{
using System;
using System.Text;
using System.Reflection;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.CodeDom;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing.Design;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Diagnostics;
using System.IO;
using System.Windows.Forms;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Design;
using System.Runtime.Serialization;
using System.Workflow.ComponentModel.Serialization;
using System.ComponentModel.Design.Serialization;
using System.Xml;
[DesignerSerializer(typeof(StateDesignerConnectorLayoutSerializer), typeof(WorkflowMarkupSerializer))]
internal class StateDesignerConnector : Connector
{
internal const int ConnectorPadding = 10;
private string _setStateName;
private string _eventHandlerName;
private string _sourceStateName;
private string _targetStateName;
internal StateDesignerConnector(ConnectionPoint source, ConnectionPoint target)
: base(source, target)
{
}
private StateDesigner RootStateDesigner
{
get
{
StateDesigner stateDesigner = (StateDesigner)this.ParentDesigner;
while (true && stateDesigner != null)
{
StateDesigner parentStateDesigner = stateDesigner.ParentDesigner as StateDesigner;
if (parentStateDesigner == null)
break;
stateDesigner = parentStateDesigner;
}
return stateDesigner;
}
}
internal string SetStateName
{
get
{
return _setStateName;
}
set
{
_setStateName = value;
}
}
internal string EventHandlerName
{
get
{
return _eventHandlerName;
}
set
{
_eventHandlerName = value;
}
}
internal string SourceStateName
{
get
{
return _sourceStateName;
}
set
{
_sourceStateName = value;
}
}
internal string TargetStateName
{
get
{
return _targetStateName;
}
set
{
_targetStateName = value;
}
}
internal void ClearConnectorSegments()
{
this.SetConnectorSegments(new Collection<Point>());
}
protected override void OnLayout(ActivityDesignerLayoutEventArgs e)
{
if (!this.RootStateDesigner.HasActiveDesigner)
base.OnLayout(e);
}
protected override ICollection<Rectangle> ExcludedRoutingRectangles
{
get
{
StateDesigner sourceStateDesigner = (StateDesigner)this.Source.AssociatedDesigner;
List<Rectangle> excluded = new List<Rectangle>(base.ExcludedRoutingRectangles);
if (sourceStateDesigner.IsRootDesigner)
{
excluded.AddRange(sourceStateDesigner.EventHandlersBounds);
}
return excluded.AsReadOnly();
}
}
public override bool HitTest(Point point)
{
if (this.RootStateDesigner != null && this.RootStateDesigner.ActiveDesigner != null)
return false;
return base.HitTest(point);
}
protected override void OnPaintEdited(ActivityDesignerPaintEventArgs e, Point[] segments, Point[] segmentEditPoints)
{
if (this.RootStateDesigner != null && this.RootStateDesigner.ActiveDesigner != null)
return; // we don't draw connectors in the EventDriven view
StateMachineTheme theme = e.DesignerTheme as StateMachineTheme;
if (theme != null)
{
using (Pen lineEditPen = new Pen(WorkflowTheme.CurrentTheme.AmbientTheme.SelectionForeColor, 1))
{
lineEditPen.DashStyle = DashStyle.Dash;
e.Graphics.DrawLines(lineEditPen, segments);
if (Source != null)
Source.OnPaint(e, false);
for (int i = 1; i < segments.Length - 1; i++)
PaintEditPoints(e, segments[i], false);
for (int i = 0; i < segmentEditPoints.Length; i++)
PaintEditPoints(e, segmentEditPoints[i], true);
if (Target != null)
Target.OnPaint(e, false);
}
}
}
protected override void OnPaintSelected(ActivityDesignerPaintEventArgs e, bool primarySelection, Point[] segmentEditPoints)
{
if (this.RootStateDesigner != null && this.RootStateDesigner.ActiveDesigner != null)
return; // we don't draw connectors in the EventDriven view
StateMachineTheme theme = e.DesignerTheme as StateMachineTheme;
if (theme != null)
{
Size arrowCapSize = new Size(theme.ConnectorSize.Width / 5, theme.ConnectorSize.Height / 5);
Size maxCapSize = theme.ConnectorSize;
using (Pen lineSelectionPen = new Pen(WorkflowTheme.CurrentTheme.AmbientTheme.SelectionForeColor, 1))
{
StateMachineDesignerPaint.DrawConnector(e.Graphics,
lineSelectionPen,
new List<Point>(ConnectorSegments).ToArray(),
arrowCapSize,
maxCapSize,
theme.ConnectorStartCap,
theme.ConnectorEndCap);
}
if (this.Source != null)
this.Source.OnPaint(e, false);
ReadOnlyCollection<Point> endSegmentEditPoints = ConnectorSegments;
for (int i = 1; i < endSegmentEditPoints.Count - 1; i++)
PaintEditPoints(e, endSegmentEditPoints[i], false);
for (int i = 0; i < segmentEditPoints.Length; i++)
PaintEditPoints(e, segmentEditPoints[i], true);
if (this.Target != null)
this.Target.OnPaint(e, false);
}
}
protected override void OnPaint(ActivityDesignerPaintEventArgs e)
{
if (this.RootStateDesigner != null && this.RootStateDesigner.ActiveDesigner != null)
return; // we don't draw connectors in the EventDriven view
StateMachineTheme theme = e.DesignerTheme as StateMachineTheme;
if (theme != null)
{
Size arrowCapSize = new Size(theme.ConnectorSize.Width / 5, theme.ConnectorSize.Height / 5);
Size maxCapSize = theme.ConnectorSize;
StateMachineDesignerPaint.DrawConnector(e.Graphics,
theme.ConnectorPen,
new List<Point>(ConnectorSegments).ToArray(),
arrowCapSize,
maxCapSize,
theme.ConnectorStartCap,
theme.ConnectorEndCap);
}
}
private void PaintEditPoints(ActivityDesignerPaintEventArgs e, Point point, bool drawMidSegmentEditPoint)
{
Size size = (Source != null) ? Source.Bounds.Size : Size.Empty;
if (!size.IsEmpty)
{
Rectangle bounds = new Rectangle(point.X - size.Width / 2, point.Y - size.Height / 2, size.Width, size.Height);
if (drawMidSegmentEditPoint)
{
using (GraphicsPath path = new GraphicsPath())
{
path.AddLine(new Point(bounds.Left + bounds.Width / 2, bounds.Top), new Point(bounds.Right, bounds.Top + bounds.Height / 2));
path.AddLine(new Point(bounds.Right, bounds.Top + bounds.Height / 2), new Point(bounds.Left + bounds.Width / 2, bounds.Bottom));
path.AddLine(new Point(bounds.Left + bounds.Width / 2, bounds.Bottom), new Point(bounds.Left, bounds.Top + bounds.Height / 2));
path.AddLine(new Point(bounds.Left, bounds.Top + bounds.Height / 2), new Point(bounds.Left + bounds.Width / 2, bounds.Top));
e.Graphics.FillPath(Brushes.White, path);
e.Graphics.DrawPath(e.AmbientTheme.SelectionForegroundPen, path);
}
}
else
{
bounds.Inflate(-1, -1);
e.Graphics.FillEllipse(e.AmbientTheme.SelectionForegroundBrush, bounds);
}
}
}
}
#region StateDesignerConnectorLayoutSerializer
internal class StateDesignerConnectorLayoutSerializer : ConnectorLayoutSerializer
{
protected override PropertyInfo[] GetProperties(WorkflowMarkupSerializationManager serializationManager, object obj)
{
if (serializationManager == null)
throw new ArgumentNullException("serializationManager");
if (obj == null)
throw new ArgumentNullException("obj");
List<PropertyInfo> properties = new List<PropertyInfo>(base.GetProperties(serializationManager, obj));
properties.Add(typeof(StateDesignerConnector).GetProperty("SetStateName", BindingFlags.Instance | BindingFlags.NonPublic));
properties.Add(typeof(StateDesignerConnector).GetProperty("SourceStateName", BindingFlags.Instance | BindingFlags.NonPublic));
properties.Add(typeof(StateDesignerConnector).GetProperty("TargetStateName", BindingFlags.Instance | BindingFlags.NonPublic));
properties.Add(typeof(StateDesignerConnector).GetProperty("EventHandlerName", BindingFlags.Instance | BindingFlags.NonPublic));
return properties.ToArray();
}
protected override object CreateInstance(WorkflowMarkupSerializationManager serializationManager, Type type)
{
if (serializationManager == null)
throw new ArgumentNullException("serializationManager");
if (type == null)
throw new ArgumentNullException("type");
StateDesignerConnector connector = null;
IReferenceService referenceService = serializationManager.GetService(typeof(IReferenceService)) as IReferenceService;
FreeformActivityDesigner freeformDesigner = serializationManager.Context[typeof(FreeformActivityDesigner)] as FreeformActivityDesigner;
if (freeformDesigner != null && referenceService != null)
{
StateDesigner.DesignerLayoutConnectionPoint sourceConnection = null;
ConnectionPoint targetConnection = null;
StateDesigner.TransitionInfo transitionInfo = null;
StateDesigner rootStateDesigner = null;
try
{
Dictionary<string, string> constructionArguments = GetConnectorConstructionArguments(serializationManager, type);
if (constructionArguments.ContainsKey("EventHandlerName") &&
constructionArguments.ContainsKey("SetStateName") &&
constructionArguments.ContainsKey("TargetStateName"))
{
CompositeActivity eventHandler = (CompositeActivity)referenceService.GetReference(constructionArguments["EventHandlerName"] as string);
SetStateActivity setState = (SetStateActivity)referenceService.GetReference(constructionArguments["SetStateName"] as string);
StateActivity targetState = (StateActivity)referenceService.GetReference(constructionArguments["TargetStateName"] as string);
transitionInfo = new StateDesigner.TransitionInfo(setState, eventHandler);
transitionInfo.TargetState = targetState;
}
if (constructionArguments.ContainsKey("SourceActivity") &&
constructionArguments.ContainsKey("SourceConnectionIndex") &&
constructionArguments.ContainsKey("SourceConnectionEdge") &&
constructionArguments.ContainsKey("EventHandlerName"))
{
StateDesigner sourceDesigner = (StateDesigner)StateDesigner.GetDesigner(referenceService.GetReference(constructionArguments["SourceActivity"] as string) as Activity);
CompositeActivity eventHandler = (CompositeActivity)referenceService.GetReference(constructionArguments["EventHandlerName"] as string);
rootStateDesigner = sourceDesigner.RootStateDesigner;
DesignerEdges sourceEdge = (DesignerEdges)Enum.Parse(typeof(DesignerEdges), constructionArguments["SourceConnectionEdge"] as string);
int sourceIndex = Convert.ToInt32(constructionArguments["SourceConnectionIndex"] as string, System.Globalization.CultureInfo.InvariantCulture);
if (sourceDesigner != null && eventHandler != null && sourceEdge != DesignerEdges.None && sourceIndex >= 0)
sourceConnection = new StateDesigner.DesignerLayoutConnectionPoint(sourceDesigner, sourceIndex, eventHandler, sourceEdge);
}
if (constructionArguments.ContainsKey("TargetActivity") &&
constructionArguments.ContainsKey("TargetConnectionIndex") &&
constructionArguments.ContainsKey("TargetConnectionEdge"))
{
ActivityDesigner targetDesigner = StateDesigner.GetDesigner(referenceService.GetReference(constructionArguments["TargetActivity"] as string) as Activity);
DesignerEdges targetEdge = (DesignerEdges)Enum.Parse(typeof(DesignerEdges), constructionArguments["TargetConnectionEdge"] as string);
int targetIndex = Convert.ToInt32(constructionArguments["TargetConnectionIndex"] as string, System.Globalization.CultureInfo.InvariantCulture);
if (targetDesigner != null && targetEdge != DesignerEdges.None && targetIndex >= 0)
targetConnection = new ConnectionPoint(targetDesigner, targetEdge, targetIndex);
}
}
catch
{
}
if (transitionInfo != null && sourceConnection != null && targetConnection != null)
{
connector = rootStateDesigner.FindConnector(transitionInfo);
if (connector == null)
{
rootStateDesigner.AddingSetState = false;
try
{
connector = freeformDesigner.AddConnector(sourceConnection, targetConnection) as StateDesignerConnector;
}
finally
{
rootStateDesigner.AddingSetState = true;
}
}
else
{
connector.Source = sourceConnection;
connector.Target = targetConnection;
connector.ClearConnectorSegments();
}
}
}
return connector;
}
}
#endregion
}
|
