Another Task Grouping Bug....

[Eric]

Hey,

I found a simple to reproduce bug.  When I have task A with children B and C, C with children D and E and E with children F.  I want to move D and E so their parents are A instead of C.  D works fine but E does not because it has children. This seems like this control was designed so tasks should never be moved, with the amount of problems that it causes.... Below is the full code, I am using 2012 Q2 on wpf.
Thanks,
Eric

using System;
using System.Windows;

namespace Scratch
{
    using System.Collections.ObjectModel;

    using Telerik.Windows.Controls.GanttView;
    using Telerik.Windows.Controls.Scheduling;

    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            var ts = new ObservableCollection<IGanttTask>();
            gantt.VisibleRange = new DateRange(DateTime.Now.AddMinutes(0), DateTime.Now.AddMinutes(6));
            gantt.PixelLength = new TimeSpan(0,0,0,1);
            gantt.TasksSource = ts;
            var a = new GanttTask { Start = DateTime.Now.AddMinutes(0), End = DateTime.Now.AddMinutes(6), Title = "A" };
            var b = new GanttTask { Start = DateTime.Now.AddMinutes(0), End = DateTime.Now.AddMinutes(1), Title = "B" };
            var c = new GanttTask { Start = DateTime.Now.AddMinutes(2), End = DateTime.Now.AddMinutes(6), Title = "C" };
            var d = new GanttTask { Start = DateTime.Now.AddMinutes(2), End = DateTime.Now.AddMinutes(3), Title = "D" };
            var e = new GanttTask { Start = DateTime.Now.AddMinutes(4), End = DateTime.Now.AddMinutes(6), Title = "E" };
            var f = new GanttTask { Start = DateTime.Now.AddMinutes(5), End = DateTime.Now.AddMinutes(6), Title = "F" };
            ts.Add(a);
            a.Children.Add(b);
            a.Children.Add(c);
            c.Children.Add(d);
            c.Children.Add(e);
            e.Children.Add(f);

            // The error occours In the below lines (when E is moved)
            c.Children.Remove(d);
            a.Children.Add(d);
            c.Children.Remove(e);
            a.Children.Add(e);
        }
    }
}

<Window x:Class="Scratch.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:Controls="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GanttView"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Controls:RadGanttView x:Name="gantt"/>
    </Grid>
</Window>

[Ventzi]

Hi Eric,

Please check the other forum thread regarding to this issue.

Kind regards,
Ventzi
the Telerik team