/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached.
/// This parameter is typically used to configure the page.</param>
protected async override void OnNavigatedTo(NavigationEventArgs e)
{
Geopoint myPoint;
if (e.Parameter == null)
{
//Add
isViewing = false;
var locator = new Geolocator();
locator.DesiredAccuracyInMeters = 50;
// MUST ENABLE THE LOCATION CAPABILITY!!
var position = await locator.GetGeopositionAsync();
myPoint = position.Coordinate.Point;
}
else
{
//View or Delete
isViewing = true;
lifeThread = (LifeThread)e.Parameter;
titleTextBox.Text = lifeThread.Title;
noteTextBox.Text = lifeThread.Thread;
addButton.Content = "Delete";
var myPosition = new Windows.Devices.Geolocation.BasicGeoposition();
myPosition.Latitude = lifeThread.Latitude;
myPosition.Longitude = lifeThread.Longitude;
myPoint = new Geopoint(myPosition);
}
await MyMap.TrySetViewAsync(myPoint, 16d);
}
private async void addButton_Click(object sender, RoutedEventArgs e)
{
if (isViewing)
{
// Delete
var messageDialog = new Windows.UI.Popups.MessageDialog("Are you sure?");
// Add commands and set their callbacks; both buttons use the same callback function
messageDialog.Commands.Add(new UICommand(
"Delete",
new UICommandInvokedHandler(this.CommandInvokedHandler)));
messageDialog.Commands.Add(new UICommand(
"Cancel",
new UICommandInvokedHandler(this.CommandInvokedHandler)));
// Set the command that will be invoked by default
messageDialog.DefaultCommandIndex = 0;
// Set the command to be invoked when escape is pressed
messageDialog.CancelCommandIndex = 1;
// Show the message dialog
await messageDialog.ShowAsync();
}
else
{
// Add
LifeThread newLifeThead = new LifeThread();
newLifeThead.Title = titleTextBox.Text;
newLifeThead.Thread = noteTextBox.Text;
newLifeThead.Created = DateTime.Now;
newLifeThead.Latitude = MyMap.Center.Position.Latitude;
newLifeThead.Longitude = MyMap.Center.Position.Longitude;
App.DataModel.AddLifeThread(newLifeThead);
Frame.Navigate(typeof(MainPage));
}
}
public async void DeleteLifeThread(LifeThread lifeThread)
{
_lifeThreads.Remove(lifeThread);
await saveLifeThreadDataAsync();
}
public async void AddLifeThread(LifeThread lifeThread)
{
_lifeThreads.Add(lifeThread);
await saveLifeThreadDataAsync();
}