public void OnNavigatedTo(MtNavigationEventArgs e)
{
if (PageKey != null) // new instance
{
return;
}
var frameState = MtSuspensionManager.SessionStateForFrame(_page.Frame);
PageKey = "Page" + _page.Frame.BackStackDepth;
if (e.NavigationMode == NavigationMode.New)
{
var nextPageKey = PageKey;
var nextPageIndex = _page.Frame.BackStackDepth;
while (frameState.Remove(nextPageKey))
{
nextPageIndex++;
nextPageKey = "Page" + nextPageIndex;
}
// Does not make sense when no page state is available...
//var args = new MtLoadStateEventArgs(e.Parameter, null);
//var copy = LoadState;
//if (copy != null)
// copy(this, args);
_page.LoadState(e.Parameter, null);
//_page.OnLoadState(args);
}
else
{
var pageState = (Dictionary <String, Object>)frameState[PageKey];
var args = new MtLoadStateEventArgs(e.Parameter, pageState);
var copy = LoadState;
if (copy != null)
{
copy(this, args);
}
_page.LoadState(e.Parameter, pageState);
_page.OnLoadState(args);
}
}
public void OnNavigatedFrom(MtNavigationEventArgs e)
{
if (_page.Frame.DisableForwardStack && e.NavigationMode == NavigationMode.Back)
{
return;
}
var frameState = MtSuspensionManager.SessionStateForFrame(_page.Frame);
var pageState = new Dictionary <String, Object>();
var args = new MtSaveStateEventArgs(pageState);
var copy = SaveState;
if (copy != null)
{
copy(this, args);
}
_page.SaveState(pageState);
_page.OnSaveState(args);
frameState[PageKey] = pageState;
}
