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posts tagged with blend

Techdays 2012 Sessies

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By Fons Sonnemans, 05-mrt-2012

Ook dit jaar heb ik mogen spreken op het Techdays event van Microsoft dat op 16 en 17 februari in Den Haag gehouden is. Deze keer met 3 sessies waarvan er twee op Channel9 te bekijken zijn.

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DevDays 2011 Sessies

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By Fons Sonnemans, 09-mei-2011

Ook dit jaar heb ik mogen spreken op het DevDays event van Microsoft dat op 28 en 29 april in Den Haag gehouden is. Deze keer met 3 sessies waarvan er twee op Channel9 te bekijken zijn. Helaas is mijn 'Windows Phone Marketplace' sessie van de Geeknight niet gepubliceerd.

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Touch Gesture Triggers for Windows Phone 7 projects in Blend 4.0

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By Fons Sonnemans, 04-jun-2010

The Windows Phone 7 supports single and multi touch gestures. I have implemented the Tap, Double Tap and the Touch&Hold gestures using Triggers. You can use them to trigger an Action in Expression Blend.

You first have to reference the GestureTriggersLibrary. Then you add an Action to a control using the Behavior assets. Finally you change the TriggerType using the New button.

The following example has tree TextBlock controls on with a ChangePropertyAction attached to it. This action sets the Text of the red TextBlock (textBlockResult) using the Tap, Double Tap or Touch and Hold GestureTriggers.

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RightMouseTrigger

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By Fons Sonnemans, 09-mei-2010

I have written a Silverlight Minesweepe game in October 2008. I just published an improved version on Silver Arcade which support right mouse click. I implemented it using the following RightMouseTrigger. You can set the SetHandled property to true. This stops the MouseRightButtonDown event from bubbling to it's parent.

I really love Behaviors, Actions and Triggers. I hope you like it too.

public class RightMouseTrigger : EventTriggerBase<Control> {


    protectedoverridestring GetEventName() {

        return"MouseRightButtonDown";

    }


    #region SetHandled Dependency Property


    ///<summary>

    /// Get or Sets the SetHandled dependency property. 

    ///</summary>

    publicbool SetHandled {

        get { return (bool)GetValue(SetHandledProperty); }

        set { SetValue(SetHandledProperty, value); }

    }


    ///<summary>

    /// Identifies the SetHandled dependency property.

    /// This enables animation, styling, binding, etc...

    ///</summary>

    publicstaticreadonlyDependencyProperty SetHandledProperty =

        DependencyProperty.Register("SetHandled",

                                    typeof(bool),

                                    typeof(RightMouseTrigger),

                                    newPropertyMetadata(true));


    #endregion SetHandled Dependency Property


    protectedoverridevoid OnEvent(EventArgs eventArgs) {

        var ea = eventArgs asMouseButtonEventArgs;

        if (ea != null && SetHandled) {

            ea.Handled = true;

        }

        base.OnEvent(eventArgs);

    }


}

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Keyboard selection on Silverlight ListBox and ComboBox

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By Fons Sonnemans, 07-feb-2010

Silverlight doesn't support keyboard selection on a ListBox or Combox. I have created a small Behavior which fixes this problem. You can attach the KeyboardSelectionBehavior to a ListBox or ComboBox using Microsoft Expression Blend. You drag it from the Assets and drop it on your ComboBox or ListBox. If you have a custom ItemTemplate you will have to set the SelectionMemberPath property.

Try my behavior below. If you press a key on the ComboBox or ListBoxes it will select the next item starting with the given key.

Get Microsoft Silverlight

The ComboBox in this example is not databound, The behavior uses the Convert.ToString() method to convert the Content of each ListBoxItem/ComboBoxItem to a string. An invariant case insensitive StartWith() comparison is used to find the next item.

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Silverlight Behaviors and Commands

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By Fons Sonnemans, 21-dec-2009

A few months ago I wrote an blog post about a Silverlight 3.0 LetItSnowBehavior. This Behavior can be used to add a Snow effect to a Canvas. Very usefull if you want to create a christmas card.

This behavior was always showing you falling snow flakes. You couldn't stop and (re)start the gameloop. The best way to implement this is by adding Commands to the behavior. This allows you to select one or more triggers to Start or Stop the gameloop. I have added the Start and Stop properties of the type ICommand to the LetItSnowBehavior class. In the constructor I have initialized these properties with new ActionCommand objects (Microsoft.Expression.Interactions.dll) and delegates to the OnStop() and OnStart() methods. Triggers attached to these commands will execute the these methods.

public class LetItSnowBehavior : Behavior<Canvas> {

 

    privateDispatcherTimer _gameLoop = newDispatcherTimer();

 

    public LetItSnowBehavior() {

        // Create Commands

        this.Start = newActionCommand(this.OnStart);

        this.Stop = newActionCommand(this.OnStop);

 

        // Init timer

        _gameLoop.Interval = newTimeSpan(0, 0, 0, 0, 10);

        _gameLoop.Tick += newEventHandler(gameLoop_Tick);

        _gameLoop.Start();

    }

 

    publicICommand Start { get; privateset; }

 

    publicICommand Stop { get; privateset; }

 

    privatevoid OnStart() {

        _gameLoop.Start();

    }

 

    privatevoid OnStop() {

        _gameLoop.Stop();

    }

 

    ...

You can use Expression Blend to attach triggers to the Commands. Select the LetItSnowBehavior object and open it properties. Click the + button for the Start property and select an EventTrigger. Select the 'buttonStart' as source and the 'Click' as event. You can even add multiple triggers to the command.

Set Triggers on LetItSnowBehavior in Expression Blend 3.0

You can download the code from here.

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SilverlightXP 2.0 release

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By Fons Sonnemans, 24-nov-2009

Visit SilverlightXP

SilverlightXP is a web application where Silverlight Developers and Designers can post links to controls, resources and other interesting information about Microsoft Silverlight.

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Control a MediaElement using a custom Behavior

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By Fons Sonnemans, 11-okt-2009

Controlling a MediaElement in Silverlight isn't difficult. You use the Play(), Stop() and Pause() methods in your code. I have written the 'ControlMediaElementAction' Behavior which makes it even easier. You don't have to write a single line of code. The ControlMediaElementAction is associated with a MediaElement. It has a ControlMediaElementOption which you can set to Play, Stop, Pause and RewindAndPlay. The Invoke() methods controls (Plays, Stops, Pauses and RewindAndPlays) the AssociatedObject (MediaElement).

public class ControlMediaElementAction : TriggerAction<MediaElement> {

 

    protectedoverridevoid Invoke(object o) {

        switch (ControlMediaElementOption) {

            caseControlMediaElementOption.Play:

                this.AssociatedObject.Play();

                break;

            caseControlMediaElementOption.Stop:

                this.AssociatedObject.Stop();

                break;

            caseControlMediaElementOption.Pause:

                this.AssociatedObject.Pause();

                break;

            caseControlMediaElementOption.RewindAndPlay:

                this.AssociatedObject.Position = TimeSpan.Zero;

                this.AssociatedObject.Play();

                break;

            default:

                break;

        }

    }

 

    publicControlMediaElementOption ControlMediaElementOption { get; set; }

 

}

 

public enum ControlMediaElementOption {

    Play, Stop, Pause, RewindAndPlay

}

You assign a ControlMediaElementAction to a MediaElement. In Expression Blend you drag it from you Asset tab and drop it on a MediaElement. Then you can select your trigger and set all other properties from the Properties tab.

ControlMediaElementAction in Blend 3.0

In the following example I have 3 ControlMediaElementAction assigned to a MediaElement. The first is triggerd by the 'Click' event of 'buttonPlay' and uses the 'Play' option. The second is triggerd by the 'Click' event of 'buttonPause' and uses the 'Pause' option. The third is triggerd by the 'MediaEnded' event of the MediaElement and uses the 'RewindAndPlay' option, making the movie loop.

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Silverlight XP.net

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By Fons Sonnemans, 01-sep-2009

I'm proud to announce the Silverlight XP.net website. It is a web application where Silverlight Developers can post links to interesting information, controls, resources e.t.c. We invite you to submit your Silverlight resources.

Silverlight XP.net is a Silverlight 3.0 LOB application which uses a lot of the new techniques:

  • .NET Ria Services
  • Navigation Application (deeplinking + history)
  • Search Engine Optimization (SEO)
  • Behaviors

Silverlight XP was created by Loek van den Ouweland and me, and is currently at version 1.0. We plan to add a lot of features soon. We don’t have a feedback-function yet. Please drop comments about the website by mail.

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Silverlight 3.0 LetItSnowBehavior

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By Fons Sonnemans, 14-aug-2009

Silverlight 3.0 has a great new feature called Behaviors. You can use them for a lot of things, one of them is to create a SNOW effect in a canvas. I know it is not yet Christmas but I like to be prepared. If you don't know what a behavior is or how to write them read first this blog post from Andrea Boschin.

You can download the sourcecode from here.

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