/// <summary>
/// <para>Called when the back button has been pressed for the application page this object is listening to.</para>
/// <para>Converts the back navigation event to a back key event that is compatible with Corona.</para>
/// </summary>
/// <param name="sender">The page that raised this event.</param>
/// <param name="e">Provides a "Cancel" property that will prevent navigating back if set true.</param>
private void OnPageNavigatingBack(Corona.WinRT.Interop.UI.IPage sender, CoronaLabs.WinRT.CancelEventArgs e)
{
// Do not continue if the given event was already handled/canceled.
if (e.Cancel)
{
return;
}
// Create event arguments for a "back" key.
var keyEventArgs = CreateKeyEventFor(Corona.WinRT.Interop.Input.Key.Back);
// Raise a key down event.
if (this.ReceivedKeyDown != null)
{
this.ReceivedKeyDown(this, keyEventArgs);
if (keyEventArgs.Handled)
{
e.Cancel = true;
return;
}
}
// Raise a key up event.
if (this.ReceivedKeyUp != null)
{
this.ReceivedKeyUp(this, keyEventArgs);
if (keyEventArgs.Handled)
{
e.Cancel = true;
return;
}
}
}
/// <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);
}
}
