DesignerPainter.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 / NetFx35 / System.WorkflowServices / System / Workflow / ComponentModel / Design / DesignerPainter.cs / 1305376 / DesignerPainter.cs
                        

                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.Workflow.ComponentModel.Design 
{
    using System; 
    using System.Collections.Generic; 
    using System.Text;
    using System.Workflow.ComponentModel.Design; 
    using System.Windows.Forms;
    using System.Reflection;
    using System.Drawing;
    using System.Diagnostics; 
    using System.ServiceModel;
 
 
    // 
    // This is a helper class with static methods that dont fit anywhere but are useful in general 
    // 
    internal static class DesignerPainter
    {
 
        public static CompositeActivityDesigner GetRootDesigner(ActivityDesigner designer)
        { 
            if (designer == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("designer"); 
            }

            CompositeActivityDesigner rootDesigner = designer.ParentDesigner;
            while (!rootDesigner.IsRootDesigner && rootDesigner.ParentDesigner != null) 
            {
                rootDesigner = rootDesigner.ParentDesigner; 
            } 
            return rootDesigner;
        } 
        public static void PaintDesigner(ActivityDesigner activityDesigner, ActivityDesignerPaintEventArgs eventArgs)
        {
            if (activityDesigner == null)
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("activityDesigner");
            } 
            if (eventArgs == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("eventArgs"); 
            }
            ActivityDesigner parentDesigner = activityDesigner.ParentDesigner;
            if (parentDesigner == null)
            { 
                // This designer is no more on the design surface , dont paint this.
                return; 
            } 
            if (!IsBranchVisible(activityDesigner))
            { 
                return;
            }
            // special case designers contained inside activity preview designers ( only one of the contained designers is shown)
            bool visible = false; 
            if (IsInsidePreviewDesignerBranch(activityDesigner, out visible))
            { 
                if (visible) 
                {
                    PaintDesignerInternal(activityDesigner, eventArgs); 
                }
            }
            else
            { 
                PaintDesignerInternal(activityDesigner, eventArgs);
            } 
        } 

        private static bool IsBranchVisible(ActivityDesigner activityDesigner) 
        {
            ActivityDesigner currentDesigner = activityDesigner;
            ActivityDesigner parentDesigner = activityDesigner.ParentDesigner;
            while (!currentDesigner.IsRootDesigner) 
            {
                if (!((CompositeActivityDesigner) parentDesigner).ContainedDesigners.Contains(currentDesigner)) 
                { 
                    return false;
                } 
                else
                {
                    currentDesigner = parentDesigner;
                    parentDesigner = parentDesigner.ParentDesigner; 
                }
            } 
            return true; 
        }
 
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1800:DoNotCastUnnecessarily")]
        // The above suppression is required because, the parentDesigner object is changeing inside the loop and it is
        // not possible to cache the result of the cast as suggested by FxCop
        private static bool IsInsidePreviewDesignerBranch(ActivityDesigner activityDesigner, out bool visible) 
        {
            visible = false; 
            ActivityDesigner currentDesigner = activityDesigner; 
            ActivityDesigner parentDesigner = activityDesigner.ParentDesigner;
            while (!currentDesigner.IsRootDesigner) 
            {
                if (parentDesigner is ActivityPreviewDesigner)
                {
                    break; 
                }
                else 
                { 
                    currentDesigner = parentDesigner;
                    parentDesigner = parentDesigner.ParentDesigner; 
                }
            }
            if (parentDesigner is ActivityPreviewDesigner)
            { 
                if (((ActivityPreviewDesigner) parentDesigner).IsContainedDesignerVisible(currentDesigner))
                { 
                    visible = true; 
                }
                return true; 
            }
            return false;
        }
 
        private static void PaintDesignerInternal(ActivityDesigner activityDesigner, ActivityDesignerPaintEventArgs eventArgs)
        { 
            IWorkflowDesignerMessageSink sink = (IWorkflowDesignerMessageSink) activityDesigner; 
            sink.OnPaint(new PaintEventArgs(eventArgs.Graphics, eventArgs.ClipRectangle), eventArgs.ClipRectangle);
        } 
    }

}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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