// A function that reads a mobile style file and builds a list for each of three symbol categories.
private async Task ReadMobileStyle()
{
// Open a mobile style file.
_emojiStyle = await SymbolStyle.OpenAsync(_mobileStyleFilePath);
// 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);
// Loop through the results and put symbols into the appropriate list according to category.
foreach (SymbolStyleSearchResult result in styleResults)
{
// Get the symbol from the result.
MultilayerPointSymbol multiLayerSym = result.Symbol as MultilayerPointSymbol;
// Create an image from the symbol swatch.
RuntimeImage swatch = await multiLayerSym.CreateSwatchAsync();
UIImage symbolImage = await swatch.ToImageSourceAsync();
// Create an instance of the custom SymbolLayerInfo class to store info about this symbol: name, swatch image, unique ID (key).
SymbolLayerInfo symbolInfo = new SymbolLayerInfo(result.Name, symbolImage, result.Key);
// Check the category for this result and place it into the correct list.
switch (result.Category)
{
case "Eyes":
{
//
_eyeSymbolInfos.Add(symbolInfo);
break;
}
case "Mouth":
{
_mouthSymbolInfos.Add(symbolInfo);
break;
}
case "Hat":
{
_hatSymbolInfos.Add(symbolInfo);
break;
}
}
}
}
private async void LoadSymbolStyle()
{
IEnumerable <string> categories = null;
if (SymbolStyle != null)
{
try
{
SymbolStyleSearchParameters searchParams = await SymbolStyle.GetDefaultSearchParametersAsync();
categories = searchParams.Categories;
}
catch { }
}
CategoryPicker.ItemsSource = categories;
CategoryPicker.SelectedIndex = 0;
}
private async void categories_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
IList <SymbolStyleSearchResult> styleResults = null;
if (e.AddedItems.Count == 1)
{
try
{
// Search the style with the default parameters to return all symbol results.
SymbolStyleSearchParameters searchParams = await SymbolStyle.GetDefaultSearchParametersAsync();
searchParams.Categories.Clear();
searchParams.Categories.Add(e.AddedItems[0] as string);
styleResults = await SymbolStyle.SearchSymbolsAsync(searchParams);
}
catch { }
}
SymbolList.ItemsSource = styleResults;
if (styleResults?.Count > 0)
{
SymbolList.SelectedIndex = 0;
}
}
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 an empty placeholder image to represent "no symbol" for each category.
ImageSource emptyImage = null;
// 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("", emptyImage, "")
};
List <SymbolLayerInfo> mouthSymbolInfos = new List <SymbolLayerInfo> {
new SymbolLayerInfo("", emptyImage, "")
};
List <SymbolLayerInfo> hatSymbolInfos = new List <SymbolLayerInfo>()
{
new SymbolLayerInfo("", emptyImage, "")
};
// 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 = await result.GetSymbolAsync() as MultilayerPointSymbol;
// Create a swatch image from the symbol.
RuntimeImage swatch = await multiLayerSym.CreateSwatchAsync();
ImageSource symbolImage = await swatch.ToImageSourceAsync();
// 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.
EyeSymbolList.ItemsSource = eyeSymbolInfos;
MouthSymbolList.ItemsSource = mouthSymbolInfos;
HatSymbolList.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.
MessageDialog dialog = new MessageDialog("Error reading symbols from style: " + ex.Message);
await dialog.ShowAsync();
}
}
private async void ReadMobileStyle(string mobileStyleFilePath)
{
try
{
// Make sure the file exists.
if (!System.IO.File.Exists(mobileStyleFilePath))
{
throw new System.IO.FileNotFoundException("Mobile style file not found at " + mobileStyleFilePath);
}
// Open the mobile style file at the path provided.
_emojiStyle = await SymbolStyle.OpenAsync(mobileStyleFilePath);
// Get the default style search parameters.
SymbolStyleSearchParameters searchParams = await _emojiStyle.GetDefaultSearchParametersAsync();
// Search the style with the default parameters to return a list of all symbol results.
IList <SymbolStyleSearchResult> styleResults = await _emojiStyle.SearchSymbolsAsync(searchParams);
// Loop through the results and put symbols into the appropriate list according to category (eyes, mouth, hat).
foreach (SymbolStyleSearchResult result in styleResults)
{
// Get the result symbol as a multilayer point symbol.
MultilayerPointSymbol multiLayerSym = result.Symbol as MultilayerPointSymbol;
// Create a swatch for the symbol and use it to create a bitmap image.
RuntimeImage swatch = await multiLayerSym.CreateSwatchAsync();
Bitmap symbolImage = await swatch.ToImageSourceAsync();
// Check the symbol category.
switch (result.Category)
{
// Add a new SymbolLayerInfo to represent the symbol and add it to its category list.
// SymbolLayerInfo is a custom class with properties for the symbol name, swatch image, and unique key.
case "Eyes":
{
_eyeSymbolInfos.Add(new SymbolLayerInfo(result.Name, symbolImage, result.Key));
break;
}
case "Mouth":
{
_mouthSymbolInfos.Add(new SymbolLayerInfo(result.Name, symbolImage, result.Key));
break;
}
case "Hat":
{
_hatSymbolInfos.Add(new SymbolLayerInfo(result.Name, symbolImage, result.Key));
break;
}
case "Face":
{
break;
}
}
}
}
catch (Exception ex)
{
// Show the exception message.
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(Activity);
alertBuilder.SetTitle("Error reading style");
alertBuilder.SetMessage(ex.Message);
alertBuilder.Show();
}
}
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");
}
}