protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
// Navigate to new destination
if (e.NavigationMode == NavigationMode.New)
{
LatLong destination;
LatLong.TryParse(e.Parameter as String, out destination);
GotoLocation(destination, showMessage: !_firstRun);
}
else
{
// refresh the point-of-interest list given coordinates saved in page state. Note that Refresh is async, but
// we are not awaiting it to lessen risk that a resume operation will timeout
if (_pageState.MapBox != null)
{
LeftPanel.Refresh(_pageState.MapBox, _pageState.SelectedItemId);
}
// reset map to last known view
TheMap.SetView(new Location(_pageState.MapCenter.Latitude, _pageState.MapCenter.Longitude), _pageState.Zoom, MapAnimationDuration.None);
}
DataTransferManager dtm = DataTransferManager.GetForCurrentView();
dtm.DataRequested += LeftPanel.GetSharedData;
}
/// <summary>
/// Fires when map panning is complete, and the current bounds of the map can be accessed to apply the points of interest
/// (note that using TargetBounds in lieu of the event handler led to different results for the same target location depending ont
/// the visibilty of the map at the time of invocation - i.e., a navigation initiated from the search results pages reported sligthly
/// offset TargetBounds
/// </summary>
async void TheMap_ViewChangeEndedWithRefreshNeeded(object sender, ViewChangeEndedEventArgs e)
{
// refresh the left panel to reflect points of interest in current view
await LeftPanel.Refresh(new BoundingBox(TheMap.TargetBounds.North, TheMap.TargetBounds.South, TheMap.TargetBounds.West, TheMap.TargetBounds.East));
// unregister the handler
TheMap.ViewChangeEnded -= TheMap_ViewChangeEndedWithRefreshNeeded;
}
private async void Refresh_Click(object sender, RoutedEventArgs e)
{
await LeftPanel.Refresh(new BoundingBox(TheMap.TargetBounds.North, TheMap.TargetBounds.South,
TheMap.TargetBounds.West, TheMap.TargetBounds.East));
}