/// <summary>Creates a new Corona surface adapter which wraps the given DrawingSurface Xaml control.</summary>
public DotNetBackgroundSurfaceAdapter()
{
// Initialize member variables.
fPageAdapter = new UI.DotNetPageAdapter();
fDispatcher = new Corona.WinRT.Phone.Interop.UI.DotNetDispatcher();
fLastReceivedOrientation = Corona.WinRT.Interop.UI.PageOrientation.Unknown;
fDirect3DSurfaceAdapter = new Direct3DSurfaceAdapter(this);
// Add event handlers.
fPageAdapter.OrientationChanged += OnOrientationChanged;
}
/// <summary>
/// <para>Called when the page that is hosting the rendering surface has changed orientations.</para>
/// <para>Raises a "Resized" event if the orientation has changed from portrait to landscape or vice-versa.</para>
/// </summary>
/// <param name="sender">The page that raised this event.</param>
/// <param name="e">Event arguments providing the new page orientation.</param>
private void OnOrientationChanged(
Corona.WinRT.Interop.UI.IPage sender, Corona.WinRT.Interop.UI.PageOrientationEventArgs e)
{
// Do not continue if the orientation has not changed.
// Note: This can happen if this adapter was once given a different page reference.
if (fLastReceivedOrientation == e.Orientation)
{
return;
}
// Raise a "Resized" event if the orientation has changed from portrait to landscape or vice-versa.
// This is because this adapter provides the surface width and height relative to the app's orientation.
bool wasResized =
(fLastReceivedOrientation == Corona.WinRT.Interop.UI.PageOrientation.Unknown) ||
(e.Orientation == Corona.WinRT.Interop.UI.PageOrientation.Unknown) ||
(fLastReceivedOrientation.IsLandscape != e.Orientation.IsLandscape);
fLastReceivedOrientation = e.Orientation;
if (wasResized && (this.Resized != null))
{
this.Resized(this, CoronaLabs.WinRT.EmptyEventArgs.Instance);
}
}
