Report a Silverlight Bug

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

rdlecler — Fri, 10 Apr 2009 20:56:38 GMT

Mouse events in ScrollBar were not being triggered for me either. However, if you hook up the Scroll event the ScrollEventArgs has a enumberation data member called ScrollEventType which comes from System.Windows.Controls.Primitives. If you mouseclick on the scrollbar nothing happens. If you move you get "ThumbTrack" and whenever you lift your mouse you get "EndScroll". So if you just click UpDown, you will just get an EndScroll event. You may be able to use the scroll bar this way to control other controls. Best RDL

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

Weitzhandler — Thu, 19 Feb 2009 14:44:48 GMT

I thought WPF is better!

These Microsoft twists are disgusting!!!

Why do they matther if there will be as many handler as possible!!!!

It doesn't cost any performance, I they're just Gothamites

this pisses me off

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

Dave Britton — Tue, 08 Jul 2008 14:35:04 GMT

Let me know how it works out.

I have been 100% in the 1.0 SL word up until now, so this is all new stuff to me too. Cool stuff though.

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

Flyte — Tue, 08 Jul 2008 13:23:20 GMT

Ah, excellent - thank you both for that!

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

SilverlightShow — Tue, 08 Jul 2008 09:02:43 GMT

Flyte:
I would like to try your method, but I have not been able to find out how to create instances of my own classes in the XAML. I've searched for this and been unsuccessful in finding any answers. I have also asked in various forums and not been met with any success.
Is there a tutorial anywhere which shows how this is done, or if it's simple, would you be able to tell me?

Hi, Flyte! Take a look at this article about how to create a custom control - http://www.silverlightshow.net/items/Creating-a-Silverlight-Custom-Control-The-Basics.aspx - and if you still have questions don't hesitate to ask!

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

Rizwan Sharp — Tue, 08 Jul 2008 07:15:37 GMT

"I would like to try your method, but I have not been able to find out how to create instances of my own classes in the XAML."

Simply Open control browse dialog in expression blend, go to custom controls tab and select your control from the list. Now your control should be added to tool box in expression blend.

Double click the control and it will be added on your UI.

I hope this helps,

Best Regards,

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

Flyte — Mon, 07 Jul 2008 21:26:21 GMT

Hi Dave, thanks for the response.

I would like to try your method, but I have not been able to find out how to create instances of my own classes in the XAML. I've searched for this and been unsuccessful in finding any answers. I have also asked in various forums and not been met with any success.

Is there a tutorial anywhere which shows how this is done, or if it's simple, would you be able to tell me?

Thanks again.

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

Dave Britton — Mon, 07 Jul 2008 21:13:22 GMT

I have fighting this same issue for a while now. The best solution seems to be inheriting the slider and exposing your own events as needed. Something like this:

public class DragSlide : Slider

{

/// <summary>

/// Thrown when the thumb has been clicked, and dragging is initiated

/// </summary>

public event EventHandler<EventArgs> ThumbDragStarted;

/// <summary>

/// Thrown when the thumb has been released

/// </summary>

public event EventHandler<EventArgs> ThumbDragCompleted;public override void OnApplyTemplate()

{

base.OnApplyTemplate();

//Set up drag event handlers

Thumb thumb = this.GetTemplateChild("HorizontalThumb") as Thumb;if (thumb != null)

{

thumb.DragStarted += new DragStartedEventHandler(thumb_DragStarted);

thumb.DragCompleted += new DragCompletedEventHandler(thumb_DragCompleted);

}

void thumb_DragCompleted(object sender, DragCompletedEventArgs e)

{

OnThumbDragCompleted(this, new EventArgs());

}

void thumb_DragStarted(object sender, DragStartedEventArgs e)

{

OnThumbDragStarted(this, new EventArgs());

}

protected virtual void OnThumbDragStarted(object sender, EventArgs e)

{

if (ThumbDragStarted != null)

ThumbDragStarted(sender, e);

}

protected virtual void OnThumbDragCompleted(object sender, EventArgs e)

{

if (ThumbDragCompleted != null)

ThumbDragCompleted(sender, e);

}

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

Flyte — Thu, 26 Jun 2008 23:34:03 GMT

Also, this method does not work for a Slider type..

Error 1 'BBOPreviewPlayer.MySlider.OnMouseLeftButtonDown(System.Windows.Input.MouseButtonEventArgs)': no suitable method found to override

Error 2 'BBOPreviewPlayer.MySlider.OnMouseLeftButtonUp(System.Windows.Input.MouseButtonEventArgs)': no suitable method found to override

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

yaip — Thu, 26 Jun 2008 21:42:27 GMT

Try putting a HyperlinkButton within Items.Control and trap the MouseLeftButtonDown event. It won't work.

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

Flyte — Thu, 26 Jun 2008 21:29:14 GMT

sensenet_silverteam:

Nope, it's not a bug, it's just a new way of handling pointing devices, because I guess mouse is not the primary input device in Silverlight anymore. Since then the controls became Click event orientated.
Here's a quick&dirty workaround (without indepth analysis of the unseen side effects!), but it provides an easy solution for those who want to use the MouseDown/Up events in the old fashioned way.

public class MyButton : Button
{

public MyButton()
{
    this.MouseLeftButtonDown += new MouseButtonEventHandler(MyButton_MouseLeftButtonDown);
    this.MouseLeftButtonUp += new MouseButtonEventHandler(MyButton_MouseLeftButtonUp);
}
void MyButton_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    this.Content = "mouse down";
}
void MyButton_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
    this.Content = "mouse up";
}
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
    base.OnMouseLeftButtonDown(e);
    e.Handled = false;
}

protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
{
    base.OnMouseLeftButtonUp(e);
    e.Handled = false;
}
}

Hope it helps.

Hi, I'd like to try and implement this workaround, but I can't figure out how to create instances of our own classes using the XAML. For example, with HTML and CSS, you'd tell the HTML element whichever CSS class you'd like it to be. This is not the case with XAML and C#.

I am trying to use MouseLeftButtonDown and up on a slider, so I would like to create a class which implements the Slider class and override it's behavior like above. It's just like I say, I don't know how to create an instance of my custom class in XAML.

Could anybody please help?

Thanks :)

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

Rizwan Sharp — Wed, 25 Jun 2008 07:23:40 GMT

I'm having the same issue where I need to handle MouseLeftButtonUp of ScrollBar control... Why would I need Scroll event only which will force me to query data repeatedly on short intervals?

I want to query database only when user moves the slider to the place of his/her choice and then release the mouse....

I hope to get a solution :(

Best Regards,

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

SilverlightShow — Wed, 25 Jun 2008 06:17:22 GMT

Hi,

I did a small example and it works just fine. Here the xaml and the source:

<UserControl
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="SilverlightTestApp.Page"
    Width="640" Height="480" xmlns:vsm="clr-namespace:System.Windows;assembly=System.Windows">

    <StackPanel>
        <ItemsControl x:Name="lbItems">
            <ItemsControl.ItemTemplate>
                <DataTemplate>
                    <StackPanel x:Name="RootElement"  Background="Beige">
                        <TextBlock Text="{Binding Text}"/>
                        <HyperlinkButton FontSize="16" NavigateUri="{Binding Link}" Content="{Binding Link}" Click="HyperlinkButton_Click"/>
                </StackPanel>
                </DataTemplate>
            </ItemsControl.ItemTemplate>            
        </ItemsControl>
        
        <TextBlock x:Name="clickedItem" />
    </StackPanel>

</UserControl>

   1: using System;   2: using System.Windows;   3: using System.Windows.Controls;   4: using System.Windows.Documents;   5: using System.Windows.Ink;   6: using System.Windows.Input;   7: using System.Windows.Media;   8: using System.Windows.Media.Animation;   9: using System.Windows.Shapes;  10: using System.Collections.Generic;  11:    12: namespace SilverlightTestApp  13: {  14:     public partial class Page : UserControl  15:     {  16:         public Page()  17:         {  18:             // Required to initialize variables  19:             InitializeComponent();  20:    21:             this.lbItems.ItemsSource = new List<TestClass>(){  22:             new TestClass(){Text="SilverlightShow.net", Link="http://www.silverlightshow.net"},  23:             new TestClass(){Text="Silverlight.net", Link="http://www.silverlight.net"},  24:             new TestClass(){Text="CompletIT.com", Link="http://www.completit.com"},  25:             new TestClass(){Text="Google.com", Link="http://www.google.com"}};  26:         }  27:    28:           private void HyperlinkButton_Click( object sender, RoutedEventArgs e )  29:         {  30:             this.clickedItem.Text = ( ( HyperlinkButton )e.Source ).Content.ToString();  31:         }  32:     }  33:    34:     public class TestClass  35:     {  36:         public string Text  37:         {  38:             get;  39:             set;  40:         }  41:    42:         public string Link  43:         {  44:             get;  45:             set;  46:         }  47:     }  48: }

You can click on the HyperlinkButton and you will see the event is triggered as it should be.

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

yaip — Tue, 24 Jun 2008 16:37:59 GMT

I tried that also. Doesn't work if the HyperlinkButton is in ItemsControl.

Re: ListBoxItem don´t trigger MouseLeftButtonDown in Beta 2

idragoev — Tue, 24 Jun 2008 13:53:47 GMT

Hi,

I faced same problem with left mouse button when styling ListBoxItems. See the Tip: Force firing MouseLeftButtonDown event on any place in a StackPanel. The trick I used is to add Background="Transparent" on the underlying control so now the left mouse button click is handled correctly.