ClemensFischer/XAML-Map-Control
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Minor tile layer updates

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This commit is contained in:
ClemensF 2020-10-25 16:09:09 +01:00
parent ea992d3d0f
commit ddf77441f2
10 changed files with 124 additions and 86 deletions
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25
MapControl/Shared/MapTileLayerBase.cs
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@ -39,7 +39,7 @@ namespace MapControl
public static readonly DependencyProperty UpdateIntervalProperty = DependencyProperty.Register(
nameof(UpdateInterval), typeof(TimeSpan), typeof(MapTileLayerBase),
new PropertyMetadata(TimeSpan.FromSeconds(0.2), (o, e) => ((MapTileLayerBase)o).UpdateTimer.Interval = (TimeSpan)e.NewValue));
new PropertyMetadata(TimeSpan.FromSeconds(0.2), (o, e) => ((MapTileLayerBase)o).updateTimer.Interval = (TimeSpan)e.NewValue));
public static readonly DependencyProperty UpdateWhileViewportChangingProperty = DependencyProperty.Register(
nameof(UpdateWhileViewportChanging), typeof(bool), typeof(MapTileLayerBase), new PropertyMetadata(false));
@ -50,6 +50,7 @@ namespace MapControl
public static readonly DependencyProperty MapForegroundProperty = DependencyProperty.Register(
nameof(MapForeground), typeof(Brush), typeof(MapTileLayerBase), new PropertyMetadata(null));
private readonly DispatcherTimer updateTimer;
private MapBase parentMap;
protected MapTileLayerBase(ITileImageLoader tileImageLoader)
@ -57,16 +58,19 @@ namespace MapControl
RenderTransform = new MatrixTransform();
TileImageLoader = tileImageLoader;
UpdateTimer = new DispatcherTimer { Interval = UpdateInterval };
UpdateTimer.Tick += (s, e) => UpdateTileLayer();
updateTimer = new DispatcherTimer { Interval = UpdateInterval };
updateTimer.Tick += (s, e) =>
{
updateTimer.Stop();
UpdateTileLayer();
};
MapPanel.InitMapElement(this);
}
public ITileImageLoader TileImageLoader { get; }
public DispatcherTimer UpdateTimer { get; }
/// <summary>
/// Provides map tile URIs or images.
/// </summary>
@ -145,6 +149,8 @@ namespace MapControl
get { return parentMap; }
set
{
updateTimer.Stop();
if (parentMap != null)
{
parentMap.ViewportChanged -= OnViewportChanged;
@ -165,20 +171,21 @@ namespace MapControl
{
if (Children.Count == 0 || e.ProjectionChanged || Math.Abs(e.LongitudeOffset) > 180d)
{
updateTimer.Stop();
UpdateTileLayer(); // update immediately when projection has changed or center has moved across 180° longitude
}
else
{
SetRenderTransform();
if (UpdateTimer.IsEnabled && !UpdateWhileViewportChanging)
if (updateTimer.IsEnabled && !UpdateWhileViewportChanging)
{
UpdateTimer.Stop(); // restart
updateTimer.Stop(); // restart
}
if (!UpdateTimer.IsEnabled)
if (!updateTimer.IsEnabled)
{
UpdateTimer.Start();
updateTimer.Start();
}
}
}