MouseDoubleClick isn't working in beta 3 release 15-10

[Duc Hoang Viet]

In beta 2, I used to addHandler for GridViewCell's MouseDoubleClickEvent to handler event double click on one row. But in beta 3, this seem not working. Is there any way to fix this?

[Milan]

Hi Duc Hoang Viet,

Thank you for reporting this issue. We will fix it for the official Q3 release. For the time being you can use the following workaround: This a class that we use in RadGridView to implement double clicks:\

public class DoubleClick
{
    private UIElement element;
    private DispatcherTimer doubleClickTimer;
    private int clickCount;

    internal event EventHandler DoubleClickEvent;

    public DoubleClick(UIElement element)
    {
        this.element = element;
        this.element.AddHandler(UIElement.MouseLeftButtonDownEvent,
            new MouseButtonEventHandler(element_MouseLeftButtonDown), true);
    }

    void element_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        this.StartDoubleClickTime();
        if (this.clickCount > 0)
            this.OnDoubleClick();

        this.clickCount++;
    }

    private void StartDoubleClickTime()
    {
        if (this.doubleClickTimer != null)
        {
            this.doubleClickTimer.Stop();
        }

        this.doubleClickTimer = new DispatcherTimer();
        this.doubleClickTimer.Interval = TimeSpan.FromMilliseconds(300);
        this.doubleClickTimer.Tick += new EventHandler(doubleClickTimer_Tick);
        this.doubleClickTimer.Start();
    }

    void doubleClickTimer_Tick(object sender, EventArgs e)
    {
        this.doubleClickTimer.Stop();
        this.clickCount = 0;
    }

    private void OnDoubleClick()
    {
        if (this.DoubleClickEvent != null)
            this.DoubleClickEvent(this.element, new EventArgs());
    }
}

Once you have this class in your project you just have to utilize it to be able to handle MouseDoubleCLick events:

public MainPage()
{
    InitializeComponent();

    this.playersGrid.ItemsSource = Club.GetPlayers();
    this.playersGrid.RowLoaded += new System.EventHandler<Telerik.Windows.Controls.GridView.RowLoadedEventArgs>(playersGrid_RowLoaded);
}

void playersGrid_RowLoaded(object sender, Telerik.Windows.Controls.GridView.RowLoadedEventArgs e)
{
    if (e.Row is GridViewHeaderRow || e.Row is GridViewNewRow || e.Row is GridViewFooterRow)
        return;

    var row = e.Row as GridViewRow;


    foreach (var item in row.Cells)
    {
        DoubleClick click = new DoubleClick(item);
        click.DoubleClickEvent += new System.EventHandler(click_DoubleClickEvent);
    }

}

void click_DoubleClickEvent(object sender, System.EventArgs e)
{

}

Hope this is helpful.

Best wishes,
Milan
the Telerik team

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[david ocasio]

I beleive the "internal" has to be removed from

internal event EventHandler DoubleClickEvent

 At least in my code it had to
since i put class "DoubleClick" in a class library.

thanks
dco

[Milan]

Hello david ocasio,

Yes, you are absolutely correct. I forgot to remove it.

Best wishes,
Milan
the Telerik team

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Watch a video on how to optimize your support resource searches and check out more tips on the blogs.

[Damian Andrade]

I have same problem, but in this screen not exits cells in my row, after run event RowLoaded is present the row in the grid and not atach to event double click but not cells

[Milan]

Hi Damian Andrade,

This is a known issue in Beta 2. You could workaround that limitation by subscribing to the DoubleClickEvent of RadGridView and in the DoubleClickEvent handler check if the clicked element is cell. Here is a sample solution with a minor modification to the DoubleClick class:

public MainPage()
{
    InitializeComponent();

    this.playersGrid.ItemsSource = Club.GetPlayers();
    DoubleClick click = new DoubleClick(this.playersGrid);
    click.DoubleClickEvent += new System.Windows.Input.MouseButtonEventHandler(click_DoubleClickEvent);
}

void click_DoubleClickEvent(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
    FrameworkElement clickedElement = sender as FrameworkElement;

    if (clickedElement is GridViewCell)
    {
        // cell was clicked
    }
    else
    {
        var cell = clickedElement.ParentOfType<GridViewCell>();

        if (cell != null)
        {
            // cell was clicked
        }
    }
}

public class DoubleClick
{
    private UIElement element;
    private DispatcherTimer doubleClickTimer;
    private int clickCount;

    internal event MouseButtonEventHandler DoubleClickEvent;

    public DoubleClick(UIElement element)
    {
        this.element = element;
        this.element.AddHandler(UIElement.MouseLeftButtonDownEvent,
            new MouseButtonEventHandler(element_MouseLeftButtonDown), true);
    }

    void element_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        this.StartDoubleClickTime();
        if (this.clickCount > 0)
            this.OnDoubleClick(e);

        this.clickCount++;
    }

    private void StartDoubleClickTime()
    {
        if (this.doubleClickTimer != null)
        {
            this.doubleClickTimer.Stop();
        }

        this.doubleClickTimer = new DispatcherTimer();
        this.doubleClickTimer.Interval = TimeSpan.FromMilliseconds(300);
        this.doubleClickTimer.Tick += new EventHandler(doubleClickTimer_Tick);
        this.doubleClickTimer.Start();
    }

    void doubleClickTimer_Tick(object sender, EventArgs e)
    {
        this.doubleClickTimer.Stop();
        this.clickCount = 0;
    }

    private void OnDoubleClick(MouseButtonEventArgs args)
    {
        if (this.DoubleClickEvent != null)
            this.DoubleClickEvent(this.element, args);
    }
}

Sincerely yours,
Milan
the Telerik team

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