/// <summary>
/// Function to get BitmapImage from RuntimeImage
/// </summary>
/// <param name="rtImage">Runtime Image</param>
/// <returns>Bitmap Image</returns>
private async Task <BitmapImage> GetImageAsync(RuntimeImage rtImage)
{
if (rtImage != null)
{
try
{
if (rtImage.LoadStatus != Esri.ArcGISRuntime.LoadStatus.Loaded)
{
await rtImage.LoadAsync();
}
var stream = await rtImage.GetEncodedBufferAsync();
var image = new BitmapImage();
image.BeginInit();
stream.Seek(0, SeekOrigin.Begin);
image.StreamSource = stream;
image.CacheOption = BitmapCacheOption.OnLoad;
image.EndInit();
return(image);
}
catch
{
return(null);
}
}
return(null);
}
private async void OnTakeScreenshotClicked(object sender, EventArgs e)
{
// Make sure an image is not in progress (check the activity indicator)
if (CreatingImageIndicator.IsVisible)
{
return;
}
// Show the activity indicator while the image is being created
CreatingImageIndicator.IsVisible = true;
try
{
// Export the image from mapview and assign it to the imageview
RuntimeImage exportedImage = await MyMapView.ExportImageAsync();
// Create layout for sublayers page
// Create root layout
StackLayout layout = new StackLayout();
Button closeButton = new Button
{
Text = "Close"
};
closeButton.Clicked += CloseButton_Clicked;
// Create image bitmap by getting stream from the exported image
var buffer = await exportedImage.GetEncodedBufferAsync();
byte[] data = new byte[buffer.Length];
buffer.Read(data, 0, data.Length);
var bitmap = ImageSource.FromStream(() => new MemoryStream(data));
Image image = new Image()
{
Source = bitmap,
Margin = new Thickness(10)
};
// Add elements into the layout
layout.Children.Add(closeButton);
layout.Children.Add(image);
// Create internal page for the navigation page
ContentPage screenshotPage = new ContentPage()
{
Content = layout,
Title = "Screenshot"
};
// Hide the activity indicator
CreatingImageIndicator.IsVisible = false;
// Navigate to the sublayers page
await Navigation.PushAsync(screenshotPage);
}
catch (Exception ex)
{
await((Page)Parent).DisplayAlert("Error", ex.ToString(), "OK");
}
}
private async void OnTakeScreenshotClicked(object sender, EventArgs e)
{
try
{
ScreenshotButton.IsEnabled = false;
// Wait for rendering to finish before taking the screenshot.
await WaitForRenderCompleteAsync(MyMapView);
// Export the image from the map view.
RuntimeImage exportedImage = await MyMapView.ExportImageAsync();
// Create layout for sublayers page
// Create root layout
StackLayout layout = new StackLayout();
Button closeButton = new Button
{
Text = "Close"
};
closeButton.Clicked += CloseButton_Clicked;
// Create image bitmap by getting stream from the exported image.
// NOTE: currently broken on UWP due to Xamarin.Forms bug https://github.com/xamarin/Xamarin.Forms/issues/5188.
var buffer = await exportedImage.GetEncodedBufferAsync();
byte[] data = new byte[buffer.Length];
buffer.Read(data, 0, data.Length);
var bitmap = ImageSource.FromStream(() => new MemoryStream(data));
Image image = new Image()
{
Source = bitmap,
Margin = new Thickness(10)
};
// Add elements into the layout.
layout.Children.Add(closeButton);
layout.Children.Add(image);
// Create internal page for the navigation page.
ContentPage screenshotPage = new ContentPage()
{
Content = layout,
Title = "Screenshot"
};
// Navigate to the sublayers page.
await Navigation.PushAsync(screenshotPage);
}
catch (Exception ex)
{
await Application.Current.MainPage.DisplayAlert("Error", ex.ToString(), "OK");
}
finally
{
ScreenshotButton.IsEnabled = true;
}
}
public async void UpdateMapItem()
{
// Save the map
await _map.SaveAsync();
// Export the current map view for the item's thumbnail
RuntimeImage thumbnailImg = await _mapView.ExportImageAsync();
// Get the file stream from the new thumbnail image
Stream imageStream = await thumbnailImg.GetEncodedBufferAsync();
// Update the item thumbnail
(_map.Item as PortalItem).SetThumbnailWithImage(imageStream);
await _map.SaveAsync();
}
// Handle the OnMapInfoEntered event from the item input UI.
// MapSavedEventArgs contains the title, description, and tags that were entered.
private async void MapItemInfoEntered()
{
// Get the current map.
Map myMap = _myMapView.Map;
try
{
// Show the activity indicator so the user knows work is happening.
_activityIndicator.StartAnimating();
// Get information entered by the user for the new portal item properties.
string[] tags = _tags.Split(',');
// Apply the current extent as the map's initial extent.
myMap.InitialViewpoint = _myMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
// Export the current map view for the item's thumbnail.
RuntimeImage thumbnailImg = await _myMapView.ExportImageAsync();
// See if the map has already been saved (has an associated portal item).
if (myMap.Item == null)
{
// Call a function to save the map as a new portal item.
await SaveNewMapAsync(myMap, _title, _description, tags, thumbnailImg);
// Report a successful save.
UIAlertController alert = UIAlertController.Create("Saved map",
"Saved " + _title + " to ArcGIS Online", UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
else
{
// This is not the initial save, call SaveAsync to save changes to the existing portal item.
await myMap.SaveAsync();
// Get the file stream from the new thumbnail image.
Stream imageStream = await thumbnailImg.GetEncodedBufferAsync();
// Update the item thumbnail.
((PortalItem)myMap.Item).SetThumbnail(imageStream);
await myMap.SaveAsync();
// Report update was successful.
UIAlertController alert = UIAlertController.Create("Updated map", "Saved changes to " + _title,
UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
}
catch (Exception)
{
// Report save error.
UIAlertController alert = UIAlertController.Create("Error", "Unable to save " + _title,
UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
finally
{
// Hide the progress bar.
_activityIndicator.StopAnimating();
}
}
// Event handler to get information entered by the user and save the map
private async void SaveMapAsync(object sender, SaveMapEventArgs e)
{
// Get the current map
Map myMap = MyMapView.Map;
try
{
// Show the progress bar so the user knows work is happening
SaveMapProgressBar.IsVisible = true;
// Make sure the user is logged in to ArcGIS Online
Credential cred = await EnsureLoggedInAsync();
AuthenticationManager.Current.AddCredential(cred);
// Get information entered by the user for the new portal item properties
string title = e.MapTitle;
string description = e.MapDescription;
string[] tags = e.Tags;
// Apply the current extent as the map's initial extent
myMap.InitialViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
// Export the current map view for the item's thumbnail
RuntimeImage thumbnailImage = await MyMapView.ExportImageAsync();
// See if the map has already been saved (has an associated portal item)
if (myMap.Item == null)
{
// Get the ArcGIS Online portal (will use credential from login above)
ArcGISPortal agsOnline = await ArcGISPortal.CreateAsync(new Uri(ArcGISOnlineUrl));
// Save the current state of the map as a portal item in the user's default folder
await myMap.SaveAsAsync(agsOnline, null, title, description, tags, thumbnailImage);
// Report a successful save
await((Page)Parent).DisplayAlert("Map Saved", "Saved '" + title + "' to ArcGIS Online!", "OK");
}
else
{
// This is not the initial save, call SaveAsync to save changes to the existing portal item
await myMap.SaveAsync();
// Get the file stream from the new thumbnail image
Stream imageStream = await thumbnailImage.GetEncodedBufferAsync();
// Update the item thumbnail
((PortalItem)myMap.Item).SetThumbnailWithImage(imageStream);
await myMap.SaveAsync();
// Report update was successful
await((Page)Parent).DisplayAlert("Updates Saved", "Saved changes to '" + myMap.Item.Title + "'", "OK");
}
}
catch (Exception ex)
{
// Show the exception message
await((Page)Parent).DisplayAlert("Unable to save map", ex.Message, "OK");
}
finally
{
// Hide the progress bar
SaveMapProgressBar.IsVisible = false;
}
}
private async void SaveMapAsync(object sender, OnSaveMapEventArgs e)
{
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(this);
// Get the current map
Map myMap = _myMapView.Map;
try
{
// Show the progress bar so the user knows work is happening
_progressBar.Visibility = ViewStates.Visible;
// Get information entered by the user for the new portal item properties
string title = e.MapTitle;
string description = e.MapDescription;
string[] tags = e.Tags;
// Apply the current extent as the map's initial extent
myMap.InitialViewpoint = _myMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
// Export the current map view for the item's thumbnail
RuntimeImage thumbnailImg = await _myMapView.ExportImageAsync();
// See if the map has already been saved (has an associated portal item)
if (myMap.Item == null)
{
// Call a function to save the map as a new portal item
await SaveNewMapAsync(myMap, title, description, tags, thumbnailImg);
// Report a successful save
alertBuilder.SetTitle("Map saved");
alertBuilder.SetMessage("Saved '" + title + "' to ArcGIS Online!");
alertBuilder.Show();
}
else
{
// This is not the initial save, call SaveAsync to save changes to the existing portal item
await myMap.SaveAsync();
// Get the file stream from the new thumbnail image
Stream imageStream = await thumbnailImg.GetEncodedBufferAsync();
// Update the item thumbnail
((PortalItem)myMap.Item).SetThumbnail(imageStream);
await myMap.SaveAsync();
// Report update was successful
alertBuilder.SetTitle("Updates saved");
alertBuilder.SetMessage("Saved changes to '" + myMap.Item.Title + "'");
alertBuilder.Show();
}
}
catch (Exception ex)
{
// Show the exception message
alertBuilder.SetTitle("Unable to save map");
alertBuilder.SetMessage(ex.Message);
alertBuilder.Show();
}
finally
{
// Hide the progress bar
_progressBar.Visibility = ViewStates.Invisible;
}
}
private async void SaveMapClicked(object sender, RoutedEventArgs e)
{
try
{
// Show the progress bar so the user knows work is happening
SaveProgressBar.Visibility = Visibility.Visible;
// Get the current map
Map myMap = MyMapView.Map;
// Apply the current extent as the map's initial extent
myMap.InitialViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
// Get the current map view for the item thumbnail
RuntimeImage thumbnailImg = await MyMapView.ExportImageAsync();
// See if the map has already been saved (has an associated portal item)
if (myMap.Item == null)
{
// Get information for the new portal item
string title = TitleTextBox.Text;
string description = DescriptionTextBox.Text;
string[] tags = TagsTextBox.Text.Split(',');
// Make sure all required info was entered
if (String.IsNullOrEmpty(title) || String.IsNullOrEmpty(description) || tags.Length == 0)
{
throw new Exception("Please enter a title, description, and some tags to describe the map.");
}
// Call a function to save the map as a new portal item
await SaveNewMapAsync(MyMapView.Map, title, description, tags, thumbnailImg);
// Report a successful save
MessageBox.Show("Saved '" + title + "' to ArcGIS Online!", "Map Saved");
}
else
{
// This is not the initial save, call SaveAsync to save changes to the existing portal item
await myMap.SaveAsync();
// Get the file stream from the new thumbnail image
Stream imageStream = await thumbnailImg.GetEncodedBufferAsync();
// Update the item thumbnail
((PortalItem)myMap.Item).SetThumbnail(imageStream);
await myMap.SaveAsync();
// Report update was successful
MessageBox.Show("Saved changes to '" + myMap.Item.Title + "'", "Updates Saved");
}
}
catch (Exception ex)
{
// Report error message
MessageBox.Show("Error saving map to ArcGIS Online: " + ex.Message);
}
finally
{
// Hide the progress bar
SaveProgressBar.Visibility = Visibility.Hidden;
}
}
private async Task ReadMobileStyle(string stylePath)
{
try
{
// Open the mobile style file at the provided path.
_emojiStyle = await SymbolStyle.OpenAsync(stylePath);
// Get the default style search parameters.
SymbolStyleSearchParameters searchParams = await _emojiStyle.GetDefaultSearchParametersAsync();
// Search the style with the default parameters to return all symbol results.
IList <SymbolStyleSearchResult> styleResults = await _emojiStyle.SearchSymbolsAsync(searchParams);
// Create lists to contain the available symbol layers for each category of symbol and add an empty entry as default.
List <SymbolLayerInfo> eyeSymbolInfos = new List <SymbolLayerInfo> {
new SymbolLayerInfo("", null, "")
};
List <SymbolLayerInfo> mouthSymbolInfos = new List <SymbolLayerInfo> {
new SymbolLayerInfo("", null, "")
};
List <SymbolLayerInfo> hatSymbolInfos = new List <SymbolLayerInfo>()
{
new SymbolLayerInfo("", null, "")
};
// Loop through the results and put symbols into the appropriate list according to category.
foreach (SymbolStyleSearchResult result in styleResults)
{
// Get the symbol for this result.
MultilayerPointSymbol multiLayerSym = result.Symbol as MultilayerPointSymbol;
// Create a swatch image from the symbol.
RuntimeImage swatch = await multiLayerSym.CreateSwatchAsync(30, 30, 96, Color.White);
// Create an image source from the swatch.
Stream imageBuffer = await swatch.GetEncodedBufferAsync();
byte[] imageData = new byte[imageBuffer.Length];
imageBuffer.Read(imageData, 0, imageData.Length);
ImageSource symbolImage = ImageSource.FromStream(() => new MemoryStream(imageData));
// Create a symbol layer info object to represent the symbol in the list.
// The symbol key will be used to retrieve the symbol from the style.
SymbolLayerInfo symbolInfo = new SymbolLayerInfo(result.Name, symbolImage, result.Key);
// Add the symbol layer info to the correct list for its category.
switch (result.Category)
{
case "Eyes":
{
eyeSymbolInfos.Add(symbolInfo);
break;
}
case "Mouth":
{
mouthSymbolInfos.Add(symbolInfo);
break;
}
case "Hat":
{
hatSymbolInfos.Add(symbolInfo);
break;
}
}
}
// Show the symbols in the category list boxes.
EyesListView.ItemsSource = eyeSymbolInfos;
MouthListView.ItemsSource = mouthSymbolInfos;
HatListView.ItemsSource = hatSymbolInfos;
// Call a function to construct the current symbol (default yellow circle).
Symbol faceSymbol = await GetCurrentSymbol();
// Call a function to show a preview image of the symbol.
await UpdateSymbolPreview(faceSymbol);
}
catch (Exception ex)
{
// Report the exception.
await DisplayAlert("Error reading style", ex.Message, "OK");
}
}
// Handle the OnMapInfoEntered event from the item input UI
// MapSavedEventArgs contains the title, description, and tags that were entered
private async void MapItemInfoEntered(object sender, MapSavedEventArgs e)
{
// Get the current map
var myMap = _myMapView.Map;
try
{
// Show the activity indicator so the user knows work is happening
_activityIndicator.StartAnimating();
// Get information entered by the user for the new portal item properties
var title = e.Title;
var description = e.Description;
var tags = e.Tags;
// Apply the current extent as the map's initial extent
myMap.InitialViewpoint = _myMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
// Export the current map view for the item's thumbnail
RuntimeImage thumbnailImg = await _myMapView.ExportImageAsync();
// See if the map has already been saved (has an associated portal item)
if (myMap.Item == null)
{
// Call a function to save the map as a new portal item
await SaveNewMapAsync(myMap, title, description, tags, thumbnailImg);
// Report a successful save
UIAlertController alert = UIAlertController.Create("Saved map", "Saved " + title + " to ArcGIS Online", UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
else
{
// This is not the initial save, call SaveAsync to save changes to the existing portal item
await myMap.SaveAsync();
// Get the file stream from the new thumbnail image
Stream imageStream = await thumbnailImg.GetEncodedBufferAsync();
// Update the item thumbnail
(myMap.Item as PortalItem).SetThumbnailWithImage(imageStream);
await myMap.SaveAsync();
// Report update was successful
UIAlertController alert = UIAlertController.Create("Updated map", "Saved changes to " + title, UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
}
catch (Exception ex)
{
// Report save error
UIAlertController alert = UIAlertController.Create("Error", "Unable to save " + e.Title, UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
finally
{
// Get rid of the item input controls
_mapInfoUI.Hide();
_mapInfoUI = null;
// Hide the progress bar
_activityIndicator.StopAnimating();
}
}
private async void SaveMapClicked(object sender, RoutedEventArgs e)
{
try
{
// Don't attempt to save if the OAuth settings weren't provided
if (string.IsNullOrEmpty(AppClientId) || string.IsNullOrEmpty(OAuthRedirectUrl))
{
var dialog = new MessageDialog("OAuth settings were not provided.", "Cannot Save");
await dialog.ShowAsync();
SaveMapFlyout.Hide();
return;
}
// Show the progress bar so the user knows work is happening
SaveProgressBar.Visibility = Visibility.Visible;
// Get the current map
var myMap = MyMapView.Map;
// Apply the current extent as the map's initial extent
myMap.InitialViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
// Export the current map view to use as the item's thumbnail
RuntimeImage thumbnailImg = await MyMapView.ExportImageAsync();
// See if the map has already been saved (has an associated portal item)
if (myMap.Item == null)
{
// Get information for the new portal item
var title = TitleTextBox.Text;
var description = DescriptionTextBox.Text;
var tagText = TagsTextBox.Text;
// Make sure all required info was entered
if (string.IsNullOrEmpty(title) || string.IsNullOrEmpty(description) || string.IsNullOrEmpty(tagText))
{
throw new Exception("Please enter a title, description, and some tags to describe the map.");
}
// Call a function to save the map as a new portal item
await SaveNewMapAsync(MyMapView.Map, title, description, tagText.Split(','), thumbnailImg);
// Report a successful save
var messageDialog = new MessageDialog("Saved '" + title + "' to ArcGIS Online!", "Map Saved");
await messageDialog.ShowAsync();
}
else
{
// This is not the initial save, call SaveAsync to save changes to the existing portal item
await myMap.SaveAsync();
// Get the file stream from the new thumbnail image
Stream imageStream = await thumbnailImg.GetEncodedBufferAsync();
// Update the item thumbnail
(myMap.Item as PortalItem).SetThumbnailWithImage(imageStream);
await myMap.SaveAsync();
// Report update was successful
var messageDialog = new MessageDialog("Saved changes to '" + myMap.Item.Title + "'", "Updates Saved");
await messageDialog.ShowAsync();
}
}
catch (Exception ex)
{
// Report error message
var messageDialog = new MessageDialog("Error saving map to ArcGIS Online: " + ex.Message);
await messageDialog.ShowAsync();
}
finally
{
// Hide the progress bar
SaveProgressBar.Visibility = Visibility.Collapsed;
}
}
