Image rotation as animation - windows-8

Question

I am making a Windows 8 application in visual studio 2012 c#.
I am having an image '1.png' and I want to rotate it at any angle as an animation along its center point.
But i want to do it with the help of c# code rather than XAML code.
Thank You in Advance.

Answer 1

In your XAML, have the following image:
<Grid Background="{StaticResource ApplicationPageBackgroundThemeBrush}">
<Image Source="/Assets/Logo.png" Width="300" RenderTransformOrigin="0.5, 0.5">
<Image.RenderTransform>
<RotateTransform x:Name="rotateTransform"/>
</Image.RenderTransform>
</Image>
</Grid>
Then, in code, write the following when you want to animate (you create the Storyboard programmatically, then add to it a relevant Timeline. Note that you can also create the RotateTransform in code if you want.
async void MainPage_Loaded(object sender, RoutedEventArgs e)
{
await Task.Delay(500);
Storyboard board = new Storyboard();
var timeline = new DoubleAnimationUsingKeyFrames();
Storyboard.SetTarget(timeline, rotateTransform);
Storyboard.SetTargetProperty(timeline, "Angle");
var frame = new EasingDoubleKeyFrame() { KeyTime = TimeSpan.FromSeconds(1), Value = 360, EasingFunction = new QuadraticEase() { EasingMode = EasingMode.EaseOut } };
timeline.KeyFrames.Add(frame);
board.Children.Add(timeline);
board.Begin();
}
This will rotate the object 360 degrees.
BTW: I am writing a set of posts that show an even better way of animating. It's not done yet, but it will give you a general idea on how to get a framework for certain types of animations..
First part of the series

Answer 2

Thanks Shahar! I took your example and made a custom control. It's actually an infinite spinning of one ring image.
Spinner.xaml:
<UserControl x:Class="MyControls.Spinner"
...
<Grid >
<Image Source="/Assets/Images/spinner.png" Width="194" RenderTransformOrigin="0.5, 0.5">
<Image.RenderTransform>
<RotateTransform x:Name="rotateTransform"/>
</Image.RenderTransform>
</Image>
</Grid>
</UserControl>
Spinner.cs:
namespace MyControls
{
public partial class Spinner: UserControl
{
public Spinner()
{
InitializeComponent();
this.Loaded += Spinner_Loaded;
}
private void PlayRotation()
{
Storyboard board = new Storyboard();
var timeline = new DoubleAnimationUsingKeyFrames();
Storyboard.SetTarget(timeline, rotateTransform);
Storyboard.SetTargetProperty(timeline, new PropertyPath("(Angle)"));
var frame = new EasingDoubleKeyFrame() { KeyTime = TimeSpan.FromSeconds(5), Value = 360, EasingFunction = new QuadraticEase() { EasingMode = EasingMode.EaseOut } };
timeline.KeyFrames.Add(frame);
board.Children.Add(timeline);
board.RepeatBehavior = RepeatBehavior.Forever;
board.Begin();
}
private async void Spinner_Loaded(object sender, RoutedEventArgs e)
{
PlayRotation();
}
}
}
Then when you want to use Spinner in another xaml, it's very simple:
Just add a line for it inside any Grid etc:
<include:Spinner/>
(of course you need to define include as something like:
xmlns:include="MyControls"
on top of your xaml)