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Blur Effect on Control

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3.88/5 (8 votes)
3 Apr 2014CPOL 39.5K   2.1K   11   10
Simple code for applying and disabling blur effect on any UIElement

Introduction

This is a very simple class to apply and remove blur effect on UIElement in WPF.

Using the Code

You have only two extension methods: BlurApply and BlurDisable. The first one is called before applying effect - for example before showing dialog. The second one is usually called in finally block to guarantee returning to normal view even if exception occurred.

C#
try
{
    this.BlurApply(BlurRadius, new TimeSpan(0, 0, 1), TimeSpan.Zero);
       MessageBox.Show("Test");
}
finally
{
       this.BlurDisable(new TimeSpan(0, 0, 5), TimeSpan.Zero);
}

Image 1

Image 2

Also, you can apply this to any UIElement, like this TextBlock:

C#
try
           {
               txt.BlurApply(BlurRadius, new TimeSpan(0, 0, 1), TimeSpan.Zero);
               MessageBox.Show("Test");
           }
           finally
           {
               txt.BlurDisable(new TimeSpan(0, 0, 5), TimeSpan.Zero);
           }

Image 3

The source code is as follows:

C#
public static class BlurElementExtension
{
    /// <summary>
    /// Turning blur on
    /// </summary>
    /// <param name="element">bluring element</param>
    /// <param name="blurRadius">blur radius</param>
    /// <param name="duration">blur animation duration</param>
    /// <param name="beginTime">blur animation delay</param>
    public static void BlurApply(this UIElement element,
        double blurRadius, TimeSpan duration, TimeSpan beginTime)
    {
            BlurEffect blur = new BlurEffect() { Radius = 0 };
            DoubleAnimation blurEnable = new DoubleAnimation(0, blurRadius, duration)
                { BeginTime = beginTime };
            element.Effect = blur;
            blur.BeginAnimation(BlurEffect.RadiusProperty, blurEnable);
    }
    /// <summary>
    /// Turning blur off
    /// </summary>
    /// <param name="element">bluring element</param>
    /// <param name="duration">blur animation duration</param>
    /// <param name="beginTime">blur animation delay</param>
    public static void BlurDisable(this UIElement element, TimeSpan duration, TimeSpan beginTime)
    {
        BlurEffect blur = element.Effect as BlurEffect;
        if (blur == null || blur.Radius == 0)
        {
            return;
        }
        DoubleAnimation blurDisable = new DoubleAnimation(blur.Radius, 0, duration) { BeginTime = beginTime };
        blur.BeginAnimation(BlurEffect.RadiusProperty, blurDisable);
    }
}

Thank you!

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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Comments and Discussions

 
QuestionNo Util project Pin
Dominique Bijnens25-Feb-20 0:50
Dominique Bijnens25-Feb-20 0:50 
QuestionColor of blur Pin
EasyHero5-Oct-17 23:23
professionalEasyHero5-Oct-17 23:23 
GeneralGood job Pin
dyma25-Aug-14 1:56
dyma25-Aug-14 1:56 
GeneralMy vote of 5 Pin
Volynsky Alex4-Apr-14 11:33
professionalVolynsky Alex4-Apr-14 11:33 
QuestionQuery about the code Pin
Tridip Bhattacharjee3-Apr-14 20:45
professionalTridip Bhattacharjee3-Apr-14 20:45 
AnswerRe: Query about the code Pin
RumataEstorish3-Apr-14 21:35
RumataEstorish3-Apr-14 21:35 
Questiontry-finally Pin
Pakosh3-Apr-14 11:04
Pakosh3-Apr-14 11:04 
AnswerRe: try-finally Pin
RumataEstorish3-Apr-14 15:13
RumataEstorish3-Apr-14 15:13 
AnswerRe: try-finally Pin
Daniele Rota Nodari3-Apr-14 21:55
Daniele Rota Nodari3-Apr-14 21:55 
Whenever an object gets changed to a temporary state before initiating some kind of work, it would be wise to ensure that after that work finishes running the objects reverts to its original state.

This can be accomplished by means of try/finally or Dispose patterns.
The code that reverts the state can be safely assumed to always hit only using one of these constructs (or through other more complicated approaches).

Examples could be:
- Changing the mouse cursor to the Wait one, due to a relatively long operation, and restoring to the default afterward; usually try/finally keywords.
- Opening a file and closing it regardless of any middle exception; usally Dispose through using keyword.
- Calling on some UI controls BeginUpdate/EndUpdate (e.g. ComboBox, ListBox, ListView) or SuspendLayout/ResumeLayout; usually try/finally keywords.
- Creating GDI objects and disposing them after usage (e.g. new Pen(...), new Font(...), new Bitmap(...)); using or try/finally based on needs.

Regards,
Daniele.
GeneralRe: try-finally Pin
RumataEstorish3-Apr-14 22:23
RumataEstorish3-Apr-14 22:23 

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