ConditionalDesigner.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Activities / Designers / ConditionalDesigner.cs / 1305376 / ConditionalDesigner.cs
                        

                        
                            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 activitiesToInsert) 
		{
 			foreach (Activity activity in activitiesToInsert)
			{
 				if (!(activity is IfElseBranchActivity)) 
 					return false;
			} 
 
            return base.CanInsertActivities(insertLocation, activitiesToInsert);
        } 

 		public override bool CanRemoveActivities(ReadOnlyCollection activitiesToRemove)
		{
			if ((ContainedDesigners.Count - activitiesToRemove.Count) < 1) 
				return false;
 
 			return true; 
		}
 
 		public override bool CanMoveActivities(HitTestInfo moveLocation, ReadOnlyCollection 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
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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