FlowDecisionDesigner.xaml.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / Tools / System.Activities.Core.Presentation / System / Activities / Core / Presentation / FlowDecisionDesigner.xaml.cs / 1305376 / FlowDecisionDesigner.xaml.cs
                        
                        
                            //---------------------------------------------------------------- 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//---------------------------------------------------------------

namespace System.Activities.Core.Presentation 
{
    using System.Activities.Presentation; 
    using System.Activities.Presentation.Metadata; 
    using System.Activities.Presentation.View;
    using System.Activities.Statements; 
    using System.ComponentModel;
    using System.Windows;
    using System.Windows.Automation.Peers;
    using System.Windows.Data; 
    using System.Windows.Documents;
    using System.Windows.Media; 
 
    partial class FlowDecisionDesigner
    { 
        public static readonly DependencyProperty ExpressionButtonVisibilityProperty =
            DependencyProperty.Register("ExpressionButtonVisibility", typeof(Visibility), typeof(FlowDecisionDesigner));

        public static readonly DependencyProperty ExpressionButtonColorProperty = 
            DependencyProperty.Register("ExpressionButtonColor", typeof(Brush), typeof(FlowDecisionDesigner));
 
        static readonly DependencyProperty ShowAllConditionsProperty = 
            DependencyProperty.Register("ShowAllConditions", typeof(bool), typeof(FlowDecisionDesigner),
            new UIPropertyMetadata(new PropertyChangedCallback(OnShowAllConditionsChanged))); 

        bool isPinned;
        bool expressionShown = false;
 
        public FlowDecisionDesigner()
        { 
            InitializeComponent(); 
            this.Loaded += (sender, e) =>
            { 
                //UnRegistering because of 137896: Inside tab control multiple Loaded events happen without an Unloaded event.
                this.ModelItem.PropertyChanged -= OnModelItemPropertyChanged;
                this.ModelItem.PropertyChanged += OnModelItemPropertyChanged;
                OnModelItemPropertyChanged(this.ModelItem, new PropertyChangedEventArgs("Condition")); 

                SetupBinding(); 
            }; 
            this.Unloaded += (sender, e) =>
            { 
                this.ModelItem.PropertyChanged -= OnModelItemPropertyChanged;
            };
            this.MouseEnter += (sender, e) =>
            { 
                Update();
            }; 
            this.MouseLeave += (sender, e) => 
            {
                Update(); 
            };
        }

        void SetupBinding() 
        {
            Binding showAllConditionsBinding = new Binding(); 
            showAllConditionsBinding.RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(FlowchartDesigner), 1); 
            showAllConditionsBinding.Path = new PropertyPath(FlowchartDesigner.ShowAllConditionsProperty);
            showAllConditionsBinding.Mode = BindingMode.OneWay; 

            BindingOperations.SetBinding(this, FlowDecisionDesigner.ShowAllConditionsProperty, showAllConditionsBinding);
        }
 
        public Visibility ExpressionButtonVisibility
        { 
            get { return (Visibility)GetValue(ExpressionButtonVisibilityProperty); } 
            set { SetValue(ExpressionButtonVisibilityProperty, value); }
        } 

        public Brush ExpressionButtonColor
        {
            get { return (Brush)GetValue(ExpressionButtonColorProperty); } 
            set { SetValue(ExpressionButtonColorProperty, value); }
        } 
 
        public bool ExpressionShown
        { 
            get { return this.expressionShown; }
        }

        public static void RegisterMetadata(AttributeTableBuilder builder) 
        {
            Type type = typeof(FlowDecision); 
            builder.AddCustomAttributes(type, new DesignerAttribute(typeof(FlowDecisionDesigner))); 
            builder.AddCustomAttributes(type, type.GetProperty("True"), BrowsableAttribute.No);
            builder.AddCustomAttributes(type, type.GetProperty("False"), BrowsableAttribute.No); 
            builder.AddCustomAttributes(type, new ActivityDesignerOptionsAttribute { AllowDrillIn = false });
            builder.AddCustomAttributes(type, new FeatureAttribute(typeof(FlowDecisionLabelFeature)));
        }
 
        protected override AutomationPeer OnCreateAutomationPeer()
        { 
            return new FlowchartExpressionAutomationPeer(this, base.OnCreateAutomationPeer()); 
        }
 

        void OnExpressionButtonClicked(object sender, RoutedEventArgs e)
        {
            this.isPinned = !this.isPinned; 
            Update();
        } 
 
        void OnModelItemPropertyChanged(object sender, PropertyChangedEventArgs e)
        { 
            if (e.PropertyName == "Condition")
            {
                Update();
            } 
        }
 
        void Update() 
        {
            Activity expressionActivity = this.ModelItem.Properties["Condition"].ComputedValue as Activity; 
            string expressionString = ExpressionHelper.GetExpressionString(expressionActivity, this.ModelItem);
            bool expressionSpecified = !string.IsNullOrEmpty(expressionString);
            if (!expressionSpecified)
            { 
                this.isPinned = false;
            } 
 
            this.ExpressionButtonVisibility = expressionSpecified ? Visibility.Visible : Visibility.Collapsed;
 
            if (this.isPinned)
            {
                this.ExpressionButtonColor = WorkflowDesignerColors.FlowchartExpressionButtonPressedBrush;
            } 
            else if (this.IsMouseOver)
            { 
                this.ExpressionButtonColor = WorkflowDesignerColors.FlowchartExpressionButtonMouseOverBrush; 
            }
            else 
            {
                this.ExpressionButtonColor = WorkflowDesignerColors.FlowchartExpressionButtonBrush;
            }
            expressionShown = false; 
            AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this);
            if (adornerLayer != null) 
            { 
                Adorner[] adorners = adornerLayer.GetAdorners(this);
                if (adorners != null) 
                {
                    foreach (Adorner adorner in adorners)
                    {
                        if (adorner is FlowchartExpressionAdorner) 
                        {
                            adornerLayer.Remove(adorner); 
                        } 
                    }
                } 
                if ((this.IsMouseOver && expressionSpecified) || this.isPinned)
                {
                    expressionShown = true;
                    adornerLayer.Add(new FlowchartExpressionAdorner(this)); 
                }
            } 
        } 

        static void OnShowAllConditionsChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e) 
        {
            if (e.NewValue != DependencyProperty.UnsetValue)
            {
                FlowDecisionDesigner designer = obj as FlowDecisionDesigner; 
                designer.OnShowAllConditionsChanged((bool)e.NewValue);
            } 
        } 

        void OnShowAllConditionsChanged(bool isOpen) 
        {
            this.isPinned = isOpen;
            Update();
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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FlowDecisionDesigner.xaml.cs source code in C# .NET

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