WPF: Newbie animation question - wpf

When button1 is clicked I want this sequence
RectangeA becomes visible
RectangeA opacity changed from 0 to 75% over lets say 3 seconds
ControlB becomes visible.
Steps 1 and 3 are easy with imperative code, but I'm assuming I need to learn how to use story boards to do step 2.


Here is the storyboard that describes your sequence:
<Storyboard x:Key="animate">
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="button1" Storyboard.TargetProperty="(UIElement.Opacity)">
<LinearDoubleKeyFrame KeyTime="00:00:00" Value="0"/>
<LinearDoubleKeyFrame KeyTime="00:00:03" Value="0.75"/>
</DoubleAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="button1" Storyboard.TargetProperty="(UIElement.Visibility)">
<DiscreteObjectKeyFrame KeyTime="00:00:00" Value="Visibility.Visible"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="control" Storyboard.TargetProperty="(UIElement.Visibility)">
<DiscreteObjectKeyFrame KeyTime="00:00:00" Value="Visibility.Visible"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
You can trigger it in xaml through EventTrigger or in code through TryFindResource().
Here is the link on Animation Overview MSDN Article and you can find there answers on your questions on many WPF animations topics.

Related

Badged control badge size

I am trying to play a bit with the badged control from Mahapps. Is it possible to change the size of the badge (not just the color/value/etc..)
Finally I am trying to do some sort of bigger pulse effect when the badge value changed, I tried the following for the color but it didn't work:
<Controls:Badged.Triggers>
<EventTrigger RoutedEvent="Controls:Badged.BadgeChanged">
<EventTrigger.EnterActions>
<BeginStoryboard Name="AnimateVisibilityChanged">
<Storyboard>
<ColorAnimation Duration="0:0:0.5"
From="#FFEE4709"
To="Green"
BeginTime="0:0:0"
Storyboard.TargetProperty="(Controls:Badged.BadgeBackground).(SolidColorBrush.Color)">
</ColorAnimation>
<ColorAnimation Duration="0:0:0.5"
From="Green"
To="Transparent"
AutoReverse="True"
BeginTime="0:0:2"
RepeatBehavior="0:0:2.5"
Storyboard.TargetProperty="(Controls:Badged.BadgeBackground).(SolidColorBrush.Color)">
</ColorAnimation>
</Storyboard>
</BeginStoryboard>
</EventTrigger.EnterActions>
<EventTrigger.ExitActions>
<RemoveStoryboard BeginStoryboardName="AnimateVisibilityChanged" />
</EventTrigger.ExitActions>
</EventTrigger>
</Controls:Badged.Triggers>
The next step if this would work is to also increase the size more than it's already increasing

It looks like I will answer to my question:
the animation didn't work because I used EnterActions instead of simply Actions (EventTrigger.Actions)
To change the size of the badge when the value changes I had to use BadgeChangedStoryboard property and replace with my own:
<SineEase x:Key="BadgeEase"
EasingMode="EaseOut" />
<Storyboard x:Key="BadgeChangedStoryboard">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleX)">
<EasingDoubleKeyFrame KeyTime="0"
Value="2.3" />
<EasingDoubleKeyFrame EasingFunction="{StaticResource BadgeEase}"
KeyTime="0:0:0.3"
Value="1" />
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleY)">
<EasingDoubleKeyFrame KeyTime="0"
Value="2.3" />
<EasingDoubleKeyFrame EasingFunction="{StaticResource BadgeEase}"
KeyTime="0:0:0.3"
Value="1" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
To change the size change both the easing double key frame Value

RepeatBehavior doesn't work in Expression Blend?

Is this just me or what? RepeatBehavior doesn't seem work for animations in Expression Blend 4. I have the following animation:
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[2].(RotateTransform.Angle)"
Storyboard.TargetName="WaitDoc" RepeatBehavior="0:0:2">
<EasingDoubleKeyFrame KeyTime="0:0:1.0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:1.1" Value="180"/>
<EasingDoubleKeyFrame KeyTime="0:0:1.2" Value="360"/>
</DoubleAnimationUsingKeyFrames>
I expect this animation to run for 2 seconds, but instead it runs only once when I click Play button in Objects and Timeline pane. I have tried values like 5x too, getting the same behavior.
I don't want to run the entire project to test every minute change. The Play button SHOULD play it as defined. Am I missing something here?
EDIT: In addition, I just discovered that Blend also doesn't show any respect for BeginTime attribute.

Try this :
<DoubleAnimationUsingKeyFrames
Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children) [2].(RotateTransform.Angle)"
Storyboard.TargetName="WaitDoc" Duration="0:0:2" RepeatBehavior="Forever">
<EasingDoubleKeyFrame KeyTime="0:0:1.0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:1.1" Value="180"/>
<EasingDoubleKeyFrame KeyTime="0:0:1.2" Value="360"/>
</DoubleAnimationUsingKeyFrames>

Change the Visibility and then change the Opacity of a Silverlight/WPF UIElement

I'm making a Windows Phone 8 app and would like to first fade out and then -- and only then -- actually turn a UIElement's Visibility to "Collapsed". However, I can't figure out how to make them happen asynchronously.
I'm using Storyboards and Blend. Here are my storyboards to toggle my little "Popup" StackPanel:
<VisualStateGroup x:Name="PopupStates">
<VisualState x:Name="PopupDisplayed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="Popup">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="Popup" d:IsOptimized="True"/>
</Storyboard>
</VisualState>
<VisualState x:Name="PopupHidden">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="Popup">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Duration="0" To="0" Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="Popup" d:IsOptimized="True"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
How can I time my storyboard events to happen one-after-another?

You can set the BeginTime property of the second animation to be the duration of the first.
From the MSDN page:
The BeginTime property is useful for creating timelines that play in a sequence: by increasing the BeginTime of successive timelines that share the same parent Storyboard, you can stagger their play times.
The example on that page shows how you use it:
<!-- Animates the rectangle's width. No
BeginTime specified so by default begins
as soon as it's parent (the Storyboard)
begins. -->
<DoubleAnimation
Storyboard.TargetName="MyAnimatedRectangle"
Storyboard.TargetProperty="Width"
To="300" Duration="0:0:1" />
<!-- Animates the rectangle's opacity. A BeginTime
of 3 seconds specified so begins three seconds
after the Storyboard begins (total of 5 seconds)-->
<DoubleAnimation BeginTime="0:0:3"
Storyboard.TargetName="MyAnimatedRectangle"
Storyboard.TargetProperty="Opacity"
To="0" Duration="0:0:1" />
The first animation starts as soon as the Storyboard starts and lasts 1 second. The second animations starts 3 seconds after the Storyboard starts and also lasts 1 second.
So in your example you'd set the duration of the animation that fades the popup to 2 seconds (say):
<DoubleAnimation Duration="0:0:2" To="0"
Storyboard.TargetProperty="(UIElement.Opacity)"
Storyboard.TargetName="Popup" d:IsOptimized="True"/>
and then set the begin time of the animation that sets the visibility to 2 seconds:
<ObjectAnimationUsingKeyFrames BeginTime="0:0:2"
Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="Popup">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>

How to change Data of a Path in WPF?

Using Visual state manager, How to change the Data for a Path. i have changed it by ObjectAnimationUsingKeyFrames in Silverlight but the same cant be used in WPF. Below i got an error that cant find the Target property "Data"..
Any Idea on this?
<Storyboard BeginTime="0">
<ObjectAnimationUsingKeyFrames BeginTime="0"
Duration="1"
Storyboard.TargetName="path"
Storyboard.TargetProperty="Data">
<DiscreteObjectKeyFrame KeyTime="0" Value="M2.1299944,9.9798575L55.945994,9.9798575 35.197562,34.081179 35.197562,62.672859 23.428433,55.942383 23.428433,33.52121z M1.3001332,0L56.635813,0C57.355887,0,57.935946,0.5891428,57.935946,1.3080959L57.935946,2.8258877C57.935946,3.5448422,57.355887,4.133985,56.635813,4.133985L1.3001332,4.133985C0.58005941,4.133985,-2.3841858E-07,3.5448422,0,2.8258877L0,1.3080959C-2.3841858E-07,0.5891428,0.58005941,0,1.3001332,0z" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>

You would have to write it this way:
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="path"
Storyboard.TargetProperty="Data">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Geometry>M2.1299944,9.9798575L55.945994,9.9798575 35.197562,34.081179 35.197562,62.672859 23.428433,55.942383 23.428433,33.52121z M1.3001332,0L56.635813,0C57.355887,0,57.935946,0.5891428,57.935946,1.3080959L57.935946,2.8258877C57.935946,3.5448422,57.355887,4.133985,56.635813,4.133985L1.3001332,4.133985C0.58005941,4.133985,-2.3841858E-07,3.5448422,0,2.8258877L0,1.3080959C-2.3841858E-07,0.5891428,0.58005941,0,1.3001332,0z</Geometry>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>

Fading effect on mouseover / hover event for silverlight?

I have a set of buttons in a grid on a Map/MapControl. I've been trying to figure out how to make it so that the buttons and the grid are usually invisible, but appear as soon as the user hovers their pointer over them. Suggestions?

http://msmvps.com/blogs/theproblemsolver/archive/2009/02/17/changing-the-mouseover-effect-on-a-silverlight-listbox.aspx
Here is an article that goes through a tutorial (using blend) to setup various Visual States. About 3/4 down the page there is a sample xaml snippet. Look for this section:
<vsm:VisualState x:Name="MouseOver">
<Storyboard>
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)">
<SplineDoubleKeyFrame KeyTime="00:00:00" Value="1.2"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)">
<SplineDoubleKeyFrame KeyTime="00:00:00" Value="1.2"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</vsm:VisualState>
Instead of changing the scale, you could change the Opacity... There's no reason this can't be written in Visul Studio, for the Blend-Challenged (like myself).
Also, refer to http://jesseliberty.com/2010/07/09/visual-state-manager-a-z/ for a set of tutorials for using the huge capabilities of the Visial State Manager.

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