private void RootFrame_Navigating(object sender, NavigatingCancelEventArgs e)
{
MobileDebug.Service.WriteEventPair("Navigating1_0", "Page", e.SourcePageType, "Mode", e.NavigationMode,
"Parameter", e.Parameter ?? "null", "TransInfo", e.NavigationTransitionInfo,
"frames", history.Reverse().Select(f => f?.PageTypeName));
HistoricFrameHandler handler;
HistoricParameter parameter;
switch (e.NavigationMode)
{
case NavigationMode.New:
case NavigationMode.Forward:
SaveDataContext();
handler = HistoricFrameHandler.GetHandler(e.SourcePageType);
parameter = handler.ToHistoricParameter(e.Parameter);
history.Push(new HistoricFrame(e.SourcePageType, parameter));
break;
case NavigationMode.Refresh:
handler = HistoricFrameHandler.GetHandler(e.SourcePageType);
parameter = handler.ToHistoricParameter(e.Parameter);
history.Pop();
history.Push(new HistoricFrame(e.SourcePageType, parameter));
break;
case NavigationMode.Back:
history.Pop();
break;
}
MobileDebug.Service.WriteEvent("Navigating2", history.Reverse().Select(f => f?.PageTypeName));
}
public bool Restore()
{
MobileDebug.Service.WriteEvent("Restore1", restoreHistory.Select(f => f.PageTypeName));
//return false;
if (restoreHistory.Count == 0)
{
return(false);
}
HistoricFrame frame = restoreHistory.Dequeue();
HistoricFrameHandler handler = HistoricFrameHandler.GetHandler(frame.Page);
parameter = handler.FromHistoricParameter(frame.Parameter, library);
try
{
MobileDebug.Service.WriteEventPair("Restore2", "Page", frame.PageTypeName, "Parameter", parameter?.Value);
//rootFrame.Navigate(typeof(MobileDebug.DebugPage), null);
return(rootFrame.Navigate(frame.Page, parameter.Value));
}
catch (Exception e)
{
MobileDebug.Service.WriteEvent("RestoreFail", e, frame.PageTypeName, parameter.Value);
restoreHistory.Clear();
return(false);
}
}
private void SaveDataContext()
{
if (history.Count == 0)
{
return;
}
HistoricFrame frame = history.Last();
if (frame.Parameter.UseDataContext)
{
HistoricFrameHandler handler = HistoricFrameHandler.GetHandler(frame.Page);
frame.Parameter.DataContext = handler.ToHistoricDataContext(GetCurrentPage().DataContext);
}
}
