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Updated TileImageLoader and ImageFileCache for WinUI

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Clemens 2021-06-28 23:35:03 +02:00
parent 9ebc88204b
commit a9475f79fe
7 changed files with 90 additions and 75 deletions
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44
MapControl/UWP/Tile.UWP.cs
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@ -3,54 +3,20 @@
// Licensed under the Microsoft Public License (Ms-PL)
using System;
using System.Threading.Tasks;
#if WINUI
using Microsoft.System;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Media;
using Microsoft.UI.Xaml.Media.Imaging;
#else
using Windows.UI.Core;
#if WINDOWS_UWP
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Media.Imaging;
#else
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Media;
using Microsoft.UI.Xaml.Media.Imaging;
#endif
namespace MapControl
{
public partial class Tile
{
public async Task SetImageAsync(Func<Task<ImageSource>> loadImageFunc)
{
var tcs = new TaskCompletionSource<object>();
async void callback()
{
try
{
SetImage(await loadImageFunc());
tcs.SetResult(null);
}
catch (Exception ex)
{
tcs.SetException(ex);
}
}
#if WINUI
if (!Image.DispatcherQueue.TryEnqueue(DispatcherQueuePriority.Low, callback))
{
// should never happen, but just in case: reset Pending state and complete TaskCompletionSource
Pending = true;
tcs.SetResult(null);
}
#else
_ = Image.Dispatcher.RunAsync(CoreDispatcherPriority.Low, callback);
#endif
_ = await tcs.Task.ConfigureAwait(false); // wait until image loading in UI thread is completed
}
public void SetImage(ImageSource image, bool fadeIn = true)
{
Pending = false;