Hi Peter,

Just checking in whether you have that source code I asked about in my previous reply..?

Thanks,

Peter,

I am creating a sample to reproduce the issue, and it would be helpful if I can get the implementation of your "PerfLogTreeMapViewModel" class.  Please post this code when you have a chance.

Thanks,

Peter,

I believe Nikolay is busy with the upcoming release, so I will take a look at this and I will post back here when I have more information (or to ask further questions if needed).

Thanks for your patience,

Hello Nikolay,

here I have the relevant code snippets (removed Style):

Control XAML:

    <UserControl x:Class="CGIAnalyzer.View.PerfLogTreeMapView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:ig="http://schemas.infragistics.com/xaml"
             xmlns:vm="clr-namespace:CGIAnalyzer.ViewModel"
             mc:Ignorable="d"
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid>
        <ig:XamTreemap
            x:Name="treeMap"
            ItemsSource="{Binding Path=AllRecordings}" NodeMouseLeftButtonDown="OnTreeMapNodeMouseLeftButtonDown" NodeMouseRightButtonDown="OnTreeMapNodeMouseRightButtonDown" DataContextChanged="OnTreeMapDataContextChanged">
            <ig:XamTreemap.NodeBinders>
                <ig:NodeBinder
                TextPath="RecorderQualifiedName"
                ValuePath="RecordingDuration"
                TargetTypeName="RecordingViewModel"
                ItemsSourcePath="ChildRecordings"
                NodeStyle="{StaticResource RecorderNodeStyle}"/>
            </ig:XamTreemap.NodeBinders>
            <ig:XamTreemap.ValueMappers>
                <ig:ColorMapper
                    ValueTypeName="RecordingViewModel"
                    ValuePath="RecordingDuration"
                    TargetProperty="Fill"
                    MappingMode="AllNodes"
                    From="#009900"
                    To="#990000"  />
            </ig:XamTreemap.ValueMappers>
        </ig:XamTreemap>
    </Grid>
</UserControl>

Control Code Behind:

    /// <summary>
    /// Interaction logic for PerfLogTreeMapView.xaml
    /// </summary>
    public partial class PerfLogTreeMapView
    {
        // Stack for drill-down
        private readonly Stack<object> _drilledNodes = new Stack<object>();

        public PerfLogTreeMapView()
        {
            InitializeComponent();

        }

        /// <summary>
        /// Drill down one level to the node under the mouse pointer.
        /// </summary>
        /// <param name="sender">Source of the event.</param>
        /// <param name="e">Further event information.</param>
        private void OnTreeMapNodeMouseLeftButtonDown(object sender, TreemapNodeClickEventArgs e)
        {

            //Check if the sender node is actually a different node from the ItemsSourceRoot
            if (treeMap.ItemsSourceRoot != e.Node.DataContext)
            {
                //Push the current ItemsSourceRoot in a stack
                _drilledNodes.Push(treeMap.ItemsSourceRoot);

                //Set the new ItemsSourceRoot
                treeMap.ItemsSourceRoot = e.Node.DataContext;
            }
        }

        /// <summary>
        /// Go up one level to the parent of the current highest level node.
        /// </summary>
        /// <param name="sender">Source of the event.</param>
        /// <param name="e">Further event information.</param>
        private void OnTreeMapNodeMouseRightButtonDown(object sender, TreemapNodeClickEventArgs e)
        {
            //Check if there are nodes in the stack
            if (_drilledNodes.Count > 0)
            {
                //Push the top node
                treeMap.ItemsSourceRoot = _drilledNodes.Pop();
            }
        }

        private void OnTreeMapDataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
        {
            if (e.OldValue != null)
            {
                var model = (PerfLogTreeMapViewModel)e.OldValue;

                model.AfterSamplingFilterChange -= OnBeforeSamplingFilterChange;               
            }


            if (e.NewValue != null)
            {
                var model = (PerfLogTreeMapViewModel)e.NewValue;

                model.BeforeSamplingFilterChange += OnBeforeSamplingFilterChange;
            }
        }

        void OnBeforeSamplingFilterChange(object sender, SamplingFilterChangedEventArgs e)
        {
            var model = sender as PerfLogTreeMapViewModel;

            if (model == null) return;

            _drilledNodes.Clear();

            if (treeMap.ItemsSourceRoot != null &&              
                treeMap.ItemsSourceRoot != model.AllRecordings) 
            {                                                    
                treeMap.ItemsSourceRoot = model.AllRecordings;
            }
        }
    }

View model (base class):

    /// <summary>
    /// Base class for all performance log views.
    /// </summary>
    internal abstract class PerfLogViewModel : WorkspaceViewModel {

        // The recordings to display.
        private ObservableCollection<RecordingViewModel> _recordings;

        /// <summary>
        /// The recording view models to be displayed.
        /// </summary>
        public ICollectionView AllRecordings {
            get {
                if (_recordings == null) {
                    _recordings = CreateRecordings();
                }
                return CollectionViewSource.GetDefaultView(_recordings);
            }
        }

        /// <summary>
        /// Sets the sampling filter for <see cref="AllRecordings"/>
        /// </summary>
        /// <param name="filter">Filter to use for sampling.</param>
        protected virtual void SetSampleFilter(Predicate<object> filter)
        {
            OnBeforeSamplingFilterChange(new SamplingFilterChangedEventArgs(filter));
            AllRecordings.Filter = filter;
            OnAfterSamplingFilterChange(new SamplingFilterChangedEventArgs(filter));
        }

        /// <summary>
        /// Removes the sampling filter for <see cref="AllRecordings"/>
        /// </summary>
        protected virtual void ResetSampleFilter()
        {
            OnBeforeSamplingFilterChange(new SamplingFilterChangedEventArgs(null));
            AllRecordings.Filter = null;
            OnAfterSamplingFilterChange(new SamplingFilterChangedEventArgs(null));
        }
    }

Hope, this is enough to get the general idea. In the derived view model, I have to do the filter assignments twice to get the desired effect.

This assignment in the controls code-behind has no effect, if a filter was set that lead to an empty result:

treeMap.ItemsSourceRoot = model.AllRecordings;

or

treeMap.ItemsSourceRoot = null;

Best Regards,

Peter