[Solved] Map freezes

[Jose]

Hi,
I'm testing RadMap. I build a window with a radmap and a listbox with locations (based on your samples).
After a few changes in the listbox, the window freezes. I must then stop the process from visual studio.
Bassically, i had a code like this:

private void listBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
       {
           ListBox lista = sender as ListBox;
           if (lista.SelectedItem == null) return;
           destino = (Location)lista.SelectedItem;
           this.radMap1.Center = destino;
       }

 
I tried in debug and in release modes.
I tried with both providers, bing and open.
If I use a 'zoom effect' like in your samples (changing the last line to "ZoomOut();") the freezes occurs after 5-10 changes in the listbox. If I use the showed code, the freezes occurs after 10-50 changes.

Thanks in advance, and excuse me if my english is not good.

[Jose]

This is a simplified version of my code that fails:
MainWindow.xaml

<Window x:Class="TelerikMapTest.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525" xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation">
    <Grid>
        <telerik:RadMap Margin="12,12,138,12" Name="radMap1" />
        <ListBox Margin="0,12,12,80" Name="listBoxSitios" HorizontalAlignment="Right" Width="120" SelectionChanged="listBoxSitios_SelectionChanged" DisplayMemberPath="Description" />
        <Label Content="Lugar" Margin="0,0,12,12" Name="labelLugar" Height="28" VerticalAlignment="Bottom" HorizontalAlignment="Right" Width="120" />
        <Label Content="Cambios:" Margin="0,0,12,46" Name="labelCambios" Height="28" VerticalAlignment="Bottom" HorizontalAlignment="Right" Width="120" />
    </Grid>
</Window>

MainWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Telerik.Windows.Controls.Map;
using System.Windows.Threading;

namespace TelerikMapTest
{
    /// <summary>
    /// Lógica de interacción para MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {

        int cuantos = 0;

        public MainWindow()
        {
            InitializeComponent();

            OpenStreetMapProvider openStreetMap = new OpenStreetMapProvider(MapMode.Road, true);
            this.radMap1.Provider = openStreetMap;

            Location coruna = new Location(43.375243, -8.397381); // Coruña
            coruna.Description = "A Coruña";
            Location muras = new Location(43.478983, -7.723503); // Muras
            muras.Description = "Muras";
            Location vimianzo = new Location(43.122187, -9.033623); // Vimianzo
            vimianzo.Description = "Vimianzo";
            Location malpica = new Location(43.335816, -8.810463); // Malpica
            malpica.Description = "Malpica";
            Location ferrol = new Location(43.502894, -8.222694); // Ferrol
            ferrol.Description = "Ferrol";

            listBoxSitios.Items.Add(coruna);
            listBoxSitios.Items.Add(muras);
            listBoxSitios.Items.Add(vimianzo);
            listBoxSitios.Items.Add(malpica);
            listBoxSitios.Items.Add(ferrol);
       }

        private void listBoxSitios_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (listBoxSitios.SelectedIndex >= 0)
            {
                Location destino = (Location)listBoxSitios.SelectedItem;
                labelLugar.Content = destino.Description;
                labelCambios.Content = "Changes: " + ++cuantos;
                this.radMap1.Center = destino;
                this.radMap1.ZoomLevel = (this.radMap1.ZoomLevel == 12 ? 9 : 12);
            }
        }
    }
}

The ZoomLevel changes in the last line of listBoxSitios_SelectionChanged() makes the problem appears sooner, but even without it the problem always appears.
After launch the app, I changed repeatly the location in the listbox with cursor keys up and down. After a few changes (in my last tests there was 65, 9, 9, 25, 5 changes, one time i reached more than 600 changes) the window freezes.

Thanks in advance
Jose.

UPDATE:
I added a button and this code:

private void radButtonStart_Click(object sender, RoutedEventArgs e)
{
    i = 0;
    ComponentDispatcher.ThreadIdle += new EventHandler(OnIdle);
}

private void OnIdle(object sender, EventArgs e)
{
    if (i >= 100)
    {
        //stop
        ComponentDispatcher.ThreadIdle -= OnIdle;
    }
    else
    {
        //Change location, and sleep to force refresh.
        listBoxSitios.SelectedIndex = i % listBoxSitios.Items.Count;
        i++;
        System.Threading.Thread.Sleep(50);
    }
}

It allows to automate the test. Just click the button and wait until the applictation hangs. In my tests never reach the 100 iterations, always freezes before.

[Andrey]

Hello Jose,

Thank you for the sample code.
We have reproduced the problem. We have created the PITS issue to fix this problem in future releases.
You can track it using the following link:
http://www.telerik.com/support/pits.aspx#/public/wpf/4750

All the best,
Andrey Murzov
the Telerik team