protected override void OnBackKeyPress(System.ComponentModel.CancelEventArgs e)
{
PanoramaItem panoramaItem = Panorama.SelectedItem as PanoramaItem;
if(panoramaItem.Name == "UserPanorama")
{
//if back button is pressed and the screen isnt showing the profile grid
//then that means we are viewing another grid. so close all other grids
//and show the user profile grid
if (userProfileGrid.Visibility == System.Windows.Visibility.Collapsed && loggedIn == true && showFriendProfileGrid.Visibility == System.Windows.Visibility.Collapsed)
{
userProfileGrid.Visibility = System.Windows.Visibility.Visible;
CheckInGrid.Visibility = System.Windows.Visibility.Collapsed;
friendShowGrid.Visibility = System.Windows.Visibility.Collapsed;
showTipGrid.Visibility = System.Windows.Visibility.Collapsed;
showMayorGrid.Visibility = System.Windows.Visibility.Collapsed;
showFriendProfileGrid.Visibility = System.Windows.Visibility.Collapsed;
//e.cancel stops app frem going back or backing out
e.Cancel = true;
}
//if the friend profile is currently visible
else if(showFriendProfileGrid.Visibility == System.Windows.Visibility.Visible)
{
//close the friend profile view and show the list of all your friends
showFriendProfileGrid.Visibility = System.Windows.Visibility.Collapsed;
friendShowGrid.Visibility = System.Windows.Visibility.Visible;
e.Cancel = true;
}
}
else if(panoramaItem.Name == "ActivityPanorama")
{
//if back button pressed and activity isnt visible then make it visible. but if the back button is pressed
//and activityfeedgrid is visible then exit the app.
if (ActivityFeedGrid.Visibility == System.Windows.Visibility.Collapsed && loggedIn == true)
{
//set venueviewmode to null so we can reclaim the memory
venueViewModel = null;
ActivityFeedGrid.Visibility = System.Windows.Visibility.Visible;
venuePageGrid.Visibility = System.Windows.Visibility.Collapsed;
ActivitySignInGrid.Visibility = System.Windows.Visibility.Collapsed;
e.Cancel = true;
}
}
}
private void ActivityFeedLongListSelector_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (ActivityFeedLongListSelector.SelectedItem == null)
return;
//get the selected item
var selectedItem = ActivityFeedLongListSelector.SelectedItem as ActivityItem;
venueViewModel = new VenueViewModel(locationMap);
//set data context of venue
venuePageGrid.DataContext = venueViewModel;
//load venue
venueViewModel.loadVenueData(venuePageGrid, ActivityProgressBar, selectedItem.venueId);
//close current grid
ActivityFeedGrid.Visibility = System.Windows.Visibility.Collapsed;
//make progress bar visible
ActivityProgressBar.IsEnabled = true;
ActivityProgressBar.Visibility = System.Windows.Visibility.Visible;
ActivityFeedLongListSelector.SelectedItem = null;
}
