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namespace System.Workflow.Activities
{
using System;
using System.Text;
using System.Reflection;
using System.Collections;
using System.Collections.ObjectModel;
using System.CodeDom;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Design;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Design;
using System.Runtime.Serialization;
using System.Diagnostics;
#region Class ConditionalToolboxItem
[Serializable]
internal sealed class IfElseToolboxItem : ActivityToolboxItem
{
public IfElseToolboxItem(Type type)
: base(type)
{
}
private IfElseToolboxItem(SerializationInfo info, StreamingContext context)
{
Deserialize(info, context);
}
protected override IComponent[] CreateComponentsCore(IDesignerHost designerHost)
{
CompositeActivity conditionalActivity = new IfElseActivity();
conditionalActivity.Activities.Add(new IfElseBranchActivity());
conditionalActivity.Activities.Add(new IfElseBranchActivity());
return (IComponent[])new IComponent[] { conditionalActivity };
}
}
#endregion
#region Class ConditionalDesigner
[ActivityDesignerTheme(typeof(IfElseDesignerTheme))]
internal sealed class IfElseDesigner : ParallelActivityDesigner
{
#region Properties and Methods
public override bool CanInsertActivities(HitTestInfo insertLocation, ReadOnlyCollection<Activity> activitiesToInsert)
{
foreach (Activity activity in activitiesToInsert)
{
if (!(activity is IfElseBranchActivity))
return false;
}
return base.CanInsertActivities(insertLocation, activitiesToInsert);
}
public override bool CanRemoveActivities(ReadOnlyCollection<Activity> activitiesToRemove)
{
if ((ContainedDesigners.Count - activitiesToRemove.Count) < 1)
return false;
return true;
}
public override bool CanMoveActivities(HitTestInfo moveLocation, ReadOnlyCollection<Activity> activitiesToMove)
{
if ((ContainedDesigners.Count - activitiesToMove.Count) < 1)
{
if (moveLocation != null && moveLocation.AssociatedDesigner != this)
return false;
}
return true;
}
protected override CompositeActivity OnCreateNewBranch()
{
return new IfElseBranchActivity();
}
protected override void OnPaint(ActivityDesignerPaintEventArgs e)
{
base.OnPaint(e);
if (!Expanded || ContainedDesigners.Count == 0 || this != ActiveView.AssociatedDesigner)
return;
CompositeDesignerTheme compositeDesignerTheme = e.DesignerTheme as CompositeDesignerTheme;
Debug.Assert(compositeDesignerTheme != null);
if (compositeDesignerTheme == null)
return;
//Draw the Icon and Text
Rectangle bounds = Bounds;
Rectangle imageRectangle = ImageRectangle;
Rectangle diamondRectangle = Rectangle.Empty;
diamondRectangle.Width = compositeDesignerTheme.ConnectorSize.Height - 2 * e.AmbientTheme.Margin.Height + 2;
diamondRectangle.Height = diamondRectangle.Width;
diamondRectangle.X = bounds.Left + bounds.Width / 2 - diamondRectangle.Width / 2;
diamondRectangle.Y = bounds.Top + TitleHeight + (compositeDesignerTheme.ConnectorSize.Height * 3 / 2 - diamondRectangle.Height) / 2 + 1;
using (GraphicsPath decisionDiamond = GetDiamondPath(diamondRectangle))
{
e.Graphics.FillPath(compositeDesignerTheme.ForegroundBrush, decisionDiamond);
e.Graphics.DrawPath(compositeDesignerTheme.ForegroundPen, decisionDiamond);
}
diamondRectangle.Y = bounds.Bottom - compositeDesignerTheme.ConnectorSize.Height * 3 / 2 + (compositeDesignerTheme.ConnectorSize.Height * 3 / 2 - diamondRectangle.Height) / 2 + 1;
using (GraphicsPath decisionDiamond = GetDiamondPath(diamondRectangle))
{
e.Graphics.FillPath(compositeDesignerTheme.ForegroundBrush, decisionDiamond);
e.Graphics.DrawPath(compositeDesignerTheme.ForegroundPen, decisionDiamond);
}
}
private GraphicsPath GetDiamondPath(Rectangle rectangle)
{
Point[] diamondPoints =
{
new Point(rectangle.Left + rectangle.Width / 2, rectangle.Top),
new Point(rectangle.Right - 1, rectangle.Top + rectangle.Height / 2),
new Point(rectangle.Left + rectangle.Width / 2, rectangle.Bottom - 1),
new Point(rectangle.Left, rectangle.Top + rectangle.Height / 2),
new Point(rectangle.Left + rectangle.Width / 2, rectangle.Top)
};
GraphicsPath diamondPath = new GraphicsPath();
diamondPath.AddLines(diamondPoints);
diamondPath.CloseFigure();
return diamondPath;
}
#endregion
}
#endregion
#region IfElseDesignerTheme
internal sealed class IfElseDesignerTheme : CompositeDesignerTheme
{
public IfElseDesignerTheme(WorkflowTheme theme)
: base(theme)
{
this.ShowDropShadow = false;
this.ConnectorStartCap = LineAnchor.None;
this.ConnectorEndCap = LineAnchor.None;
this.ForeColor = Color.FromArgb(0xFF, 0x00, 0x64, 0x00);
this.BorderColor = Color.FromArgb(0xFF, 0xE0, 0xE0, 0xE0);
this.BorderStyle = DashStyle.Dash;
this.BackColorStart = Color.FromArgb(0x00, 0x00, 0x00, 0x00);
this.BackColorEnd = Color.FromArgb(0x00, 0x00, 0x00, 0x00);
}
}
#endregion
}
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