ClemensFischer/XAML-Map-Control
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Update MapImageLayer.cs

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Clemens 2021-11-14 22:25:34 +01:00
parent b513d32df6
commit 7d04b93b6a
1 changed files with 49 additions and 34 deletions
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83
MapControl/Shared/MapImageLayer.cs
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@ -25,6 +25,7 @@ using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Threading;
using System.Xml.Linq;
#endif
namespace MapControl
@ -78,9 +79,6 @@ namespace MapControl
public MapImageLayer()
{
Children.Add(new Image { Opacity = 0d, Stretch = Stretch.Fill });
Children.Add(new Image { Opacity = 0d, Stretch = Stretch.Fill });
#if WINUI
updateTimer = DispatcherQueue.CreateTimer();
#endif
@ -197,11 +195,25 @@ namespace MapControl
/// </summary>
public BoundingBox BoundingBox { get; private set; }
/// <summary>
/// Returns an ImageSource for the current BoundingBox.
/// </summary>
protected abstract Task<ImageSource> GetImageAsync();
protected override void SetParentMap(MapBase map)
{
if (map == null)
{
updateTimer.Stop();
ClearImages();
Children.Clear();
}
else if (Children.Count == 0)
{
Children.Add(new Image { Opacity = 0d, Stretch = Stretch.Fill });
Children.Add(new Image { Opacity = 0d, Stretch = Stretch.Fill });
}
base.SetParentMap(map);
}
protected override async void OnViewportChanged(ViewportChangedEventArgs e)
{
if (e.ProjectionChanged)
@ -295,9 +307,9 @@ namespace MapControl
if (!double.IsNaN(MaxBoundingBoxWidth) && BoundingBox.Width > MaxBoundingBoxWidth)
{
var d = (BoundingBox.Width - MaxBoundingBoxWidth) / 2d;
BoundingBox.West += d;
BoundingBox.East -= d;
var margin = (BoundingBox.Width - MaxBoundingBoxWidth) / 2d;
BoundingBox.West += margin;
BoundingBox.East -= margin;
}
}
}
@ -311,13 +323,13 @@ namespace MapControl
BoundingBox.West += offset;
BoundingBox.East += offset;
foreach (var element in Children.OfType<FrameworkElement>())
foreach (var image in Children.OfType<Image>())
{
var bbox = GetBoundingBox(element);
var bbox = GetBoundingBox(image);
if (bbox != null)
{
SetBoundingBox(element, new BoundingBox(bbox.South, bbox.West + offset, bbox.North, bbox.East + offset));
SetBoundingBox(image, new BoundingBox(bbox.South, bbox.West + offset, bbox.North, bbox.East + offset));
}
}
}
@ -325,36 +337,39 @@ namespace MapControl
private void ClearImages()
{
foreach (var element in Children.OfType<FrameworkElement>())
foreach (var image in Children.OfType<Image>())
{
element.ClearValue(BoundingBoxProperty);
element.ClearValue(Image.SourceProperty);
image.ClearValue(BoundingBoxProperty);
image.ClearValue(Image.SourceProperty);
}
}
private void SwapImages(ImageSource image)
{
var topImage = (Image)Children[0];
var bottomImage = (Image)Children[1];
Children.RemoveAt(0);
Children.Insert(1, topImage);
topImage.Source = image;
SetBoundingBox(topImage, BoundingBox?.Clone());
topImage.BeginAnimation(OpacityProperty, new DoubleAnimation
if (Children.Count >= 2)
{
To = 1d,
Duration = MapBase.ImageFadeDuration
});
var topImage = (Image)Children[0];
var bottomImage = (Image)Children[1];
bottomImage.BeginAnimation(OpacityProperty, new DoubleAnimation
{
To = 0d,
BeginTime = MapBase.ImageFadeDuration,
Duration = TimeSpan.Zero
});
Children.RemoveAt(0);
Children.Insert(1, topImage);
topImage.Source = image;
SetBoundingBox(topImage, BoundingBox?.Clone());
topImage.BeginAnimation(OpacityProperty, new DoubleAnimation
{
To = 1d,
Duration = MapBase.ImageFadeDuration
});
bottomImage.BeginAnimation(OpacityProperty, new DoubleAnimation
{
To = 0d,
BeginTime = MapBase.ImageFadeDuration,
Duration = TimeSpan.Zero
});
}
}
}
}