/// The methods provided in this section are simply used to allow
/// NavigationHelper to respond to the page's navigation methods.
///
/// Page specific logic should be placed in event handlers for the
/// <see cref="GridCS.Common.NavigationHelper.LoadState"/>
/// and <see cref="GridCS.Common.NavigationHelper.SaveState"/>.
/// The navigation parameter is available in the LoadState method
/// in addition to page state preserved during an earlier session.
protected override void OnNavigatedTo(NavigationEventArgs e)
{
_project = (CanvasProject)e.Parameter;
_navigationHelper.OnNavigatedTo(e);
Task returnTask = BindImages(_project);
returnTask.ContinueWith(_ => { });
DataTransferManager dataTransferManager = DataTransferManager.GetForCurrentView();
dataTransferManager.DataRequested += DataTransferManager_DataRequested;
}
/// <summary>
/// Invoked when an item is clicked.
/// </summary>
/// <param name="sender">The GridView (or ListView when the application is snapped)
/// displaying the item clicked.</param>
/// <param name="e">Event data that describes the item clicked.</param>
async void ItemView_ItemClick(object sender, ItemClickEventArgs e)
{
var project = ((CanvasProject)e.ClickedItem);
if (project.Id == -1)
{
FileOpenPicker filePicker = new FileOpenPicker();
filePicker.FileTypeFilter.Add(".png");
filePicker.FileTypeFilter.Add(".jpg");
filePicker.FileTypeFilter.Add(".jpeg");
filePicker.ViewMode = PickerViewMode.Thumbnail;
filePicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
filePicker.SettingsIdentifier = "imagePicker";
filePicker.CommitButtonText = "Select Files for Collage";
IReadOnlyCollection <StorageFile> files = await filePicker.PickMultipleFilesAsync();
if (files.Count > 0)
{
project.ImagePath = files.First().Path;
project = new CanvasProject
{
Name = "NewCanvas.canvas",
FilePath = files.First().Path,
ImagePath = files.First().Path + ".canvasimage",
Id = -1
};
int count = 1;
project.Pictures = new List <CanvasPicture>();
foreach (var item in files)
{
CanvasPicture pict = new CanvasPicture
{
Id = count++,
ImagePath = item.Path,
SourceFile = item
};
project.Pictures.Add(pict);
}
}
}
this.Frame.Navigate(typeof(SplitPage), project);
}
private async Task BindImages(CanvasProject project)
{
collageCanvas.AllowDrop = true;
Random degrees = new Random(5);
int maxWidth = (int)Window.Current.Bounds.Width;
int maxCols = (int)maxWidth / 300;
int row = 0, col = 0;
for (int i = 0; i < project.Pictures.Count; i++)
{
var canvasPicture = project.Pictures[i];
Image image = new Image();
using (var fileStream = await canvasPicture.SourceFile.OpenAsync(FileAccessMode.Read))
{
var sourceImage = new BitmapImage();
sourceImage.SetSource(fileStream);
image.Source = sourceImage;
image.Tag = canvasPicture;
image.Height = 300;
image.Height = 200;
image.Stretch = Stretch.Uniform;
image.IsHitTestVisible = true;
image.IsTapEnabled = true;
TransformableContainer container = new TransformableContainer();
container.Content = image;
container.Transform.Rotation = degrees.Next(-15, 15);
col = (col + 1 > maxCols) ? 0 : col + 1;
row = (col + 1 > maxCols) && (i != 0) ? row + 1 : row;
container.Transform.TranslateX = col * 300;
container.Transform.TranslateY = row * 200;
container.Transform.CenterX = 150;
container.Transform.CenterY = 100;
container.CanvasPicture = canvasPicture;
collageCanvas.Children.Add(container);
}
}
}