I managed to make this run without WP7Contrib. This required some refactoring of the code and a tighter set-up of the elements that are involved in the transition.

The problem was that the UIElements involved in the Transition’s Storyboard had a MatrixTransform as a RenderTransform, where the Storyboard would have expected them to have a CompositeTransform instead.

Now, the line

ContinuumElement.GetTransform(TransformCreationMode.CreateOrAddAndIgnoreMatrix);

is supposed to prevent that, but it failed and / or was not enough, because, if you peek at what the storyboard looks like, you will notice that two elements need to have a CompositeTransform :

- ContinuumElement
- LayoutRoot

So I made this code work by following those steps :

1) Remove the call to
ContinuumElement.GetTransform(). It is a WP7Contrib method that turned out to not be sufficient and even malfunctioning for me.

I just replaced it by a check that throws an exception if any the elements involved in the transition has another kind of RenderTransform than a CompositeTransform.

But if you follow step 2, you don’t need that.

2) Make sure that the transition’s LayoutRoot and ContinuumElement have CompositeTransform.

To do this I just created a Style that sets the RenderTransform of a UIElement to be an empty CompositeTransform.

Since the LayoutRoot of the animation is by default the page where it is called, I applied the style to the PhoneApplicationPage that starts the transition, and to the ListBoxItems themselves.

And that did the trick.

Additionally I added to the ContinuumTransition class a dependency property called LayoutRoot. This way I specify the LayoutRoot of the animation myself and therefore I am sure which UIElement to apply the aforementioned style to.

Tricky, but it runs and works, but the performance is horrible.
Hope it helps someone.

Great minds must think alike as I’ve been writing a similar post – i look forward to future posts on your embedded adventure champ.

import android.os.AsyncTask;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;

public class EndlessScrollListener implements OnScrollListener {

private int visibleThreshold = 5;
private int currentPage = 0;
private int previousTotal = 0;
private boolean loading = true;
private AsyncTask asyncTask;

public EndlessScrollListener(AsyncTask task) {
this.asyncTask = task;
}

public EndlessScrollListener(int visibleThreshold) {
this.visibleThreshold = visibleThreshold;
}

public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
if (loading) {
if (totalItemCount > previousTotal) {
loading = false;
previousTotal = totalItemCount;
currentPage++;
}
}
if (!loading && (totalItemCount – visibleItemCount) <= (firstVisibleItem + visibleThreshold)) {
// I load the next page of gigs using a background task,
// but you can call any function here.
asyncTask.execute(currentPage + 1);
loading = true;
}
}

public void onScrollStateChanged(AbsListView view, int scrollState) {
}
}

this way we can make this class more generic and can use it for other variaves Activitys.

Att. Felipe

i tried this, but how do i switch between the bars?
i touched the dots which i normally use for showing menu items but nothing appears/ switches

rgds,mike