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Selecting subitem in edit mode not working properly

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Pawel
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Pawel asked on 20 Aug 2014, 08:20 AM
works.png
error.png
normal.png
I have Work class (Work.cs):
using System;
using System.Collections.Generic;
 
namespace TelerikTreeViewApp
{
    public class Work
    {
        public String Title { get; set; }
 
        public Work(String title)
        {
            Title = title;
        }
 
        public List<Project> Projects { get; set; }
    }
}
and Project class (Project.cs):
using System;
 
namespace TelerikTreeViewApp
{
    public class Project
    {
        public String Title { get; set; }
 
        public Project(String title)
        {
            Title = title;
        }
    }
}

I bind collection of Work to treeView which is using HierarchicalDataTemplate:
<Window x:Class="TelerikTreeViewApp.MainWindow"
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
                Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <DataTemplate x:Key="ProjectTemplate">
            <TextBlock Text="{Binding Title}" />
        </DataTemplate>
         
        <HierarchicalDataTemplate x:Key="WorkTemplate"
                                  ItemTemplate="{StaticResource ProjectTemplate}"
                                  ItemsSource="{Binding Projects}">
            <TextBlock Text="{Binding Title}" />
        </HierarchicalDataTemplate>
    </Window.Resources>
         
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="100" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>
         
        <StackPanel Grid.Column="0">
            <telerik:RadButton Click="RadButton_Click" Content="Test 1" />
        </StackPanel>
         
        <telerik:RadTreeView x:Name="treeView"
                             IsEditable="True"
                             ItemsSource="{Binding Works}"
                             ItemTemplate="{StaticResource WorkTemplate}"
                             PathSeparator="|"
                             telerik:TextSearch.TextPath="Title"
                             Grid.Column="1" />
    </Grid>
</Window>

TreeView shows works for first level and for second level for every work shows projects (appendix works.png).

I want to be able to programmatically select project item and set it to edit mode (MainWindow.xaml.cs, MyData class is at the end):
using System.Linq;
using System.Windows;
using Telerik.Windows.Controls;
 
namespace TelerikTreeViewApp
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private string titleWork;
 
        private string titleProject;
 
        public MainWindow()
        {
            InitializeComponent();
 
            titleWork = "Work 2";
            titleProject = titleWork + " - Project 4";
 
            DataContext = new MyData();
        }
 
        private void RadButton_Click(object sender, RoutedEventArgs e)
        {
            var work = treeView.Items.SourceCollection.Cast<Work>().FirstOrDefault(w => w.Title == titleWork);
            var workItem = treeView.ContainerFromItemRecursive(work);
 
            workItem.IsExpanded = true;
 
            var projectItem = treeView.GetItemByPath(titleWork + "|" + titleProject, "|");
 
            projectItem.IsSelected = true;
            projectItem.IsInEditMode = true;
            projectItem.Focus();
             
        }
    }
}
In RadButton_Click method I do that by GetItemByPath method. When I run application it shows some weird UI error (appendix error.png) but it should shows project title (appendix normal.png).

MyData.cs
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
 
namespace TelerikTreeViewApp
{
    public class MyData
    {
        public ObservableCollection<Work> Works { get; set; }
 
        public ObservableCollection<Project> Projects { get; set; }
 
 
        public MyData()
        {
            InitializeWorks();
 
            Projects = new ObservableCollection<Project>();
        }
 
        public void InitializeWorks()
        {
            String workTitle = String.Empty;
 
            Works = new ObservableCollection<Work>();
 
            workTitle = "Work 1";
            Works.Add(new Work(workTitle)
            {
                Projects = new List<Project>(new Project[] {
                new Project(workTitle + " - Project 1") ,
                new Project(workTitle + " - Project 2") ,
                new Project(workTitle + " - Project 3") ,
                new Project(workTitle + " - Project 4") ,
                new Project(workTitle + " - Project 5") ,
                new Project(workTitle + " - Project 6") ,
                new Project(workTitle + " - Project 7") ,
                new Project(workTitle + " - Project 8") ,
                new Project(workTitle + " - Project 9") ,
                new Project(workTitle + " - Project 10"),
                new Project(workTitle + " - Project 11") ,
                new Project(workTitle + " - Project 12") ,
                new Project(workTitle + " - Project 13") ,
                new Project(workTitle + " - Project 14") ,
                new Project(workTitle + " - Project 15") ,
                new Project(workTitle + " - Project 16") ,
                new Project(workTitle + " - Project 17") ,
                new Project(workTitle + " - Project 18") ,
                new Project(workTitle + " - Project 19") ,
                new Project(workTitle + " - Project 20")
            })
            });
            workTitle = "Work 2";
            Works.Add(new Work(workTitle)
            {
                Projects = new List<Project>(new Project[] {
                new Project(workTitle + " - Project 1") ,
                new Project(workTitle + " - Project 2") ,
                new Project(workTitle + " - Project 3") ,
                new Project(workTitle + " - Project 4") ,
                new Project(workTitle + " - Project 5") ,
                new Project(workTitle + " - Project 6") ,
                new Project(workTitle + " - Project 7") ,
                new Project(workTitle + " - Project 8") ,
                new Project(workTitle + " - Project 9") ,
                new Project(workTitle + " - Project 10"),
                new Project(workTitle + " - Project 11") ,
                new Project(workTitle + " - Project 12") ,
                new Project(workTitle + " - Project 13") ,
                new Project(workTitle + " - Project 14") ,
                new Project(workTitle + " - Project 15") ,
                new Project(workTitle + " - Project 16") ,
                new Project(workTitle + " - Project 17") ,
                new Project(workTitle + " - Project 18") ,
                new Project(workTitle + " - Project 19") ,
                new Project(workTitle + " - Project 20")
            })
            });
            workTitle = "Work 3";
            Works.Add(new Work(workTitle)
            {
                Projects = new List<Project>(new Project[] {
                new Project(workTitle + " - Project 1") ,
                new Project(workTitle + " - Project 2") ,
                new Project(workTitle + " - Project 3") ,
                new Project(workTitle + " - Project 4") ,
                new Project(workTitle + " - Project 5") ,
                new Project(workTitle + " - Project 6") ,
                new Project(workTitle + " - Project 7") ,
                new Project(workTitle + " - Project 8") ,
                new Project(workTitle + " - Project 9") ,
                new Project(workTitle + " - Project 10"),
                new Project(workTitle + " - Project 11") ,
                new Project(workTitle + " - Project 12") ,
                new Project(workTitle + " - Project 13") ,
                new Project(workTitle + " - Project 14") ,
                new Project(workTitle + " - Project 15") ,
                new Project(workTitle + " - Project 16") ,
                new Project(workTitle + " - Project 17") ,
                new Project(workTitle + " - Project 18") ,
                new Project(workTitle + " - Project 19") ,
                new Project(workTitle + " - Project 20")
            })
            });
            workTitle = "Work 4";
            Works.Add(new Work(workTitle)
            {
                Projects = new List<Project>(new Project[] {
                new Project(workTitle + " - Project 1") ,
                new Project(workTitle + " - Project 2") ,
                new Project(workTitle + " - Project 3") ,
                new Project(workTitle + " - Project 4") ,
                new Project(workTitle + " - Project 5") ,
                new Project(workTitle + " - Project 6") ,
                new Project(workTitle + " - Project 7") ,
                new Project(workTitle + " - Project 8") ,
                new Project(workTitle + " - Project 9") ,
                new Project(workTitle + " - Project 10"),
                new Project(workTitle + " - Project 11") ,
                new Project(workTitle + " - Project 12") ,
                new Project(workTitle + " - Project 13") ,
                new Project(workTitle + " - Project 14") ,
                new Project(workTitle + " - Project 15") ,
                new Project(workTitle + " - Project 16") ,
                new Project(workTitle + " - Project 17") ,
                new Project(workTitle + " - Project 18") ,
                new Project(workTitle + " - Project 19") ,
                new Project(workTitle + " - Project 20")
            })
            });
            workTitle = "Work 5";
            Works.Add(new Work(workTitle)
            {
                Projects = new List<Project>(new Project[] {
                new Project(workTitle + " - Project 1") ,
                new Project(workTitle + " - Project 2") ,
                new Project(workTitle + " - Project 3") ,
                new Project(workTitle + " - Project 4") ,
                new Project(workTitle + " - Project 5") ,
                new Project(workTitle + " - Project 6") ,
                new Project(workTitle + " - Project 7") ,
                new Project(workTitle + " - Project 8") ,
                new Project(workTitle + " - Project 9") ,
                new Project(workTitle + " - Project 10"),
                new Project(workTitle + " - Project 11") ,
                new Project(workTitle + " - Project 12") ,
                new Project(workTitle + " - Project 13") ,
                new Project(workTitle + " - Project 14") ,
                new Project(workTitle + " - Project 15") ,
                new Project(workTitle + " - Project 16") ,
                new Project(workTitle + " - Project 17") ,
                new Project(workTitle + " - Project 18") ,
                new Project(workTitle + " - Project 19") ,
                new Project(workTitle + " - Project 20")
            })
            });
            workTitle = "Work 6";
            Works.Add(new Work(workTitle)
            {
                Projects = new List<Project>(new Project[] {
                new Project(workTitle + " - Project 1") ,
                new Project(workTitle + " - Project 2") ,
                new Project(workTitle + " - Project 3") ,
                new Project(workTitle + " - Project 4") ,
                new Project(workTitle + " - Project 5") ,
                new Project(workTitle + " - Project 6") ,
                new Project(workTitle + " - Project 7") ,
                new Project(workTitle + " - Project 8") ,
                new Project(workTitle + " - Project 9") ,
                new Project(workTitle + " - Project 10"),
                new Project(workTitle + " - Project 11") ,
                new Project(workTitle + " - Project 12") ,
                new Project(workTitle + " - Project 13") ,
                new Project(workTitle + " - Project 14") ,
                new Project(workTitle + " - Project 15") ,
                new Project(workTitle + " - Project 16") ,
                new Project(workTitle + " - Project 17") ,
                new Project(workTitle + " - Project 18") ,
                new Project(workTitle + " - Project 19") ,
                new Project(workTitle + " - Project 20")
            })
            });
            workTitle = "Work 7";
            Works.Add(new Work(workTitle)
            {
                Projects = new List<Project>(new Project[] {
                new Project(workTitle + " - Project 1") ,
                new Project(workTitle + " - Project 2") ,
                new Project(workTitle + " - Project 3") ,
                new Project(workTitle + " - Project 4") ,
                new Project(workTitle + " - Project 5") ,
                new Project(workTitle + " - Project 6") ,
                new Project(workTitle + " - Project 7") ,
                new Project(workTitle + " - Project 8") ,
                new Project(workTitle + " - Project 9") ,
                new Project(workTitle + " - Project 10"),
                new Project(workTitle + " - Project 11") ,
                new Project(workTitle + " - Project 12") ,
                new Project(workTitle + " - Project 13") ,
                new Project(workTitle + " - Project 14") ,
                new Project(workTitle + " - Project 15") ,
                new Project(workTitle + " - Project 16") ,
                new Project(workTitle + " - Project 17") ,
                new Project(workTitle + " - Project 18") ,
                new Project(workTitle + " - Project 19") ,
                new Project(workTitle + " - Project 20")
            })
            });
            workTitle = "Work 8";
            Works.Add(new Work(workTitle)
            {
                Projects = new List<Project>(new Project[] {
                new Project(workTitle + " - Project 1") ,
                new Project(workTitle + " - Project 2") ,
                new Project(workTitle + " - Project 3") ,
                new Project(workTitle + " - Project 4") ,
                new Project(workTitle + " - Project 5") ,
                new Project(workTitle + " - Project 6") ,
                new Project(workTitle + " - Project 7") ,
                new Project(workTitle + " - Project 8") ,
                new Project(workTitle + " - Project 9") ,
                new Project(workTitle + " - Project 10"),
                new Project(workTitle + " - Project 11") ,
                new Project(workTitle + " - Project 12") ,
                new Project(workTitle + " - Project 13") ,
                new Project(workTitle + " - Project 14") ,
                new Project(workTitle + " - Project 15") ,
                new Project(workTitle + " - Project 16") ,
                new Project(workTitle + " - Project 17") ,
                new Project(workTitle + " - Project 18") ,
                new Project(workTitle + " - Project 19") ,
                new Project(workTitle + " - Project 20")
            })
            });
        }
 
    }
}

2 Answers, 1 is accepted

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Petar Mladenov
Telerik team
answered on 20 Aug 2014, 08:56 AM
WpfApplication1.zip
Hi Pawel,

We understand your requirement and its complexity comes from the fact that the container - the RadTreeViewItem should be first generated, then its template should be changed with EditTemplate and the Text in the InputControl should be focused. On top of this, RadTreeView uses built-in animations on expand collapse which also make the work of the UI heavier.

 However, what is the usual solution ? I will summarize it in 3 steps you can perform:

1) Make your Title properties ready for 2-way binding, for example like so:
public class Work : ViewModelBase
   {
       private string title;
       public string Title
       {
           get { return this.title; }
           set
           {
               if (this.title != value)
               {
                   this.title = value;
                   this.OnPropertyChanged("Title");
               }
           }
       }

2) Introduce EditTemplate - the template which will be applied when the item enters Edit Mode:
<DataTemplate x:Key="ItemEditTemplate">
           <TextBox Text="{Binding Title, Mode=TwoWay}" />
       </DataTemplate>
 
 <telerik:RadTreeView x:Name="treeView"
                            IsEditable="True"
                            ItemsSource="{Binding Works}"
                            ItemTemplate="{StaticResource WorkTemplate}"
                            ItemEditTemplate="{StaticResource ItemEditTemplate}"

3) Invoke the code that turns on editing in Dispatcher because the RadTreeViewItem needs time after expand animation and its actual generation:
projectItem.IsSelected = true;
Dispatcher.BeginInvoke(new Action(()=>
projectItem.IsInEditMode = true), DispatcherPriority.ApplicationIdle);
projectItem.Focus();

Let us know if this helps you move forward.

Regards,
Petar Mladenov
Telerik
 
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Pawel
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answered on 21 Aug 2014, 06:32 AM
Works great. Thank you very much.
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Petar Mladenov
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Pawel
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