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ClemensFischer
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152 changed files with 11962 additions and 12115 deletions
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@ -21,215 +21,214 @@ using Brush = Avalonia.Media.IBrush;
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using ImageSource = Avalonia.Media.IImage;
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#endif
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namespace MapControl
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namespace MapControl;
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/// <summary>
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/// Displays a single map image, e.g. from a Web Map Service (WMS).
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/// The image must be provided by the abstract GetImageAsync() method.
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/// </summary>
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public abstract partial class MapImageLayer : MapPanel, IMapLayer
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{
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/// <summary>
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/// Displays a single map image, e.g. from a Web Map Service (WMS).
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/// The image must be provided by the abstract GetImageAsync() method.
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/// </summary>
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public abstract partial class MapImageLayer : MapPanel, IMapLayer
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public static readonly DependencyProperty DescriptionProperty =
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DependencyPropertyHelper.Register<MapImageLayer, string>(nameof(Description));
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public static readonly DependencyProperty RelativeImageSizeProperty =
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DependencyPropertyHelper.Register<MapImageLayer, double>(nameof(RelativeImageSize), 1d);
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public static readonly DependencyProperty UpdateIntervalProperty =
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DependencyPropertyHelper.Register<MapImageLayer, TimeSpan>(nameof(UpdateInterval), TimeSpan.FromSeconds(0.2),
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(layer, oldValue, newValue) => layer.updateTimer.Interval = newValue);
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public static readonly DependencyProperty UpdateWhileViewportChangingProperty =
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DependencyPropertyHelper.Register<MapImageLayer, bool>(nameof(UpdateWhileViewportChanging));
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public static readonly DependencyProperty MapBackgroundProperty =
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DependencyPropertyHelper.Register<MapImageLayer, Brush>(nameof(MapBackground));
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public static readonly DependencyProperty MapForegroundProperty =
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DependencyPropertyHelper.Register<MapImageLayer, Brush>(nameof(MapForeground));
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public static readonly DependencyProperty LoadingProgressProperty =
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DependencyPropertyHelper.Register<MapImageLayer, double>(nameof(LoadingProgress), 1d);
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private readonly Progress<double> loadingProgress;
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private readonly UpdateTimer updateTimer;
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private bool updateInProgress;
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public MapImageLayer()
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{
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public static readonly DependencyProperty DescriptionProperty =
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DependencyPropertyHelper.Register<MapImageLayer, string>(nameof(Description));
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IsHitTestVisible = false;
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public static readonly DependencyProperty RelativeImageSizeProperty =
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DependencyPropertyHelper.Register<MapImageLayer, double>(nameof(RelativeImageSize), 1d);
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loadingProgress = new Progress<double>(p => SetValue(LoadingProgressProperty, p));
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public static readonly DependencyProperty UpdateIntervalProperty =
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DependencyPropertyHelper.Register<MapImageLayer, TimeSpan>(nameof(UpdateInterval), TimeSpan.FromSeconds(0.2),
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(layer, oldValue, newValue) => layer.updateTimer.Interval = newValue);
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updateTimer = new UpdateTimer { Interval = UpdateInterval };
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updateTimer.Tick += async (_, _) => await UpdateImageAsync();
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}
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public static readonly DependencyProperty UpdateWhileViewportChangingProperty =
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DependencyPropertyHelper.Register<MapImageLayer, bool>(nameof(UpdateWhileViewportChanging));
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/// <summary>
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/// Description of the layer. Used to display copyright information on top of the map.
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/// </summary>
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public string Description
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{
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get => (string)GetValue(DescriptionProperty);
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set => SetValue(DescriptionProperty, value);
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}
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public static readonly DependencyProperty MapBackgroundProperty =
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DependencyPropertyHelper.Register<MapImageLayer, Brush>(nameof(MapBackground));
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/// <summary>
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/// Relative size of the map image in relation to the current view size.
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/// Setting a value greater than one will let MapImageLayer request images that
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/// are larger than the view, in order to support smooth panning.
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/// </summary>
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public double RelativeImageSize
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{
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get => (double)GetValue(RelativeImageSizeProperty);
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set => SetValue(RelativeImageSizeProperty, value);
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}
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public static readonly DependencyProperty MapForegroundProperty =
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DependencyPropertyHelper.Register<MapImageLayer, Brush>(nameof(MapForeground));
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/// <summary>
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/// Minimum time interval between images updates.
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/// </summary>
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public TimeSpan UpdateInterval
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{
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get => (TimeSpan)GetValue(UpdateIntervalProperty);
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set => SetValue(UpdateIntervalProperty, value);
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}
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public static readonly DependencyProperty LoadingProgressProperty =
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DependencyPropertyHelper.Register<MapImageLayer, double>(nameof(LoadingProgress), 1d);
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/// <summary>
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/// Controls if images are updated while the viewport is still changing.
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/// </summary>
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public bool UpdateWhileViewportChanging
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{
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get => (bool)GetValue(UpdateWhileViewportChangingProperty);
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set => SetValue(UpdateWhileViewportChangingProperty, value);
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}
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private readonly Progress<double> loadingProgress;
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private readonly UpdateTimer updateTimer;
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private bool updateInProgress;
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/// <summary>
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/// Optional background brush. Sets MapBase.Background if not null and this layer is the base map layer.
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/// </summary>
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public Brush MapBackground
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{
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get => (Brush)GetValue(MapBackgroundProperty);
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set => SetValue(MapBackgroundProperty, value);
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}
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public MapImageLayer()
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/// <summary>
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/// Optional foreground brush. Sets MapBase.Foreground if not null and this layer is the base map layer.
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/// </summary>
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public Brush MapForeground
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{
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get => (Brush)GetValue(MapForegroundProperty);
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set => SetValue(MapForegroundProperty, value);
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}
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/// <summary>
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/// Gets the progress of the ImageLoader as a double value between 0 and 1.
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/// </summary>
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public double LoadingProgress => (double)GetValue(LoadingProgressProperty);
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protected override void SetParentMap(MapBase map)
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{
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if (map != null)
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{
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IsHitTestVisible = false;
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loadingProgress = new Progress<double>(p => SetValue(LoadingProgressProperty, p));
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updateTimer = new UpdateTimer { Interval = UpdateInterval };
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updateTimer.Tick += async (_, _) => await UpdateImageAsync();
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}
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/// <summary>
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/// Description of the layer. Used to display copyright information on top of the map.
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/// </summary>
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public string Description
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{
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get => (string)GetValue(DescriptionProperty);
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set => SetValue(DescriptionProperty, value);
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}
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/// <summary>
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/// Relative size of the map image in relation to the current view size.
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/// Setting a value greater than one will let MapImageLayer request images that
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/// are larger than the view, in order to support smooth panning.
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/// </summary>
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public double RelativeImageSize
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{
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get => (double)GetValue(RelativeImageSizeProperty);
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set => SetValue(RelativeImageSizeProperty, value);
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}
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/// <summary>
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/// Minimum time interval between images updates.
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/// </summary>
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public TimeSpan UpdateInterval
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{
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get => (TimeSpan)GetValue(UpdateIntervalProperty);
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set => SetValue(UpdateIntervalProperty, value);
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}
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/// <summary>
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/// Controls if images are updated while the viewport is still changing.
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/// </summary>
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public bool UpdateWhileViewportChanging
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{
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get => (bool)GetValue(UpdateWhileViewportChangingProperty);
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set => SetValue(UpdateWhileViewportChangingProperty, value);
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}
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/// <summary>
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/// Optional background brush. Sets MapBase.Background if not null and this layer is the base map layer.
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/// </summary>
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public Brush MapBackground
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{
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get => (Brush)GetValue(MapBackgroundProperty);
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set => SetValue(MapBackgroundProperty, value);
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}
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/// <summary>
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/// Optional foreground brush. Sets MapBase.Foreground if not null and this layer is the base map layer.
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/// </summary>
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public Brush MapForeground
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{
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get => (Brush)GetValue(MapForegroundProperty);
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set => SetValue(MapForegroundProperty, value);
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}
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/// <summary>
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/// Gets the progress of the ImageLoader as a double value between 0 and 1.
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/// </summary>
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public double LoadingProgress => (double)GetValue(LoadingProgressProperty);
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protected override void SetParentMap(MapBase map)
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{
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if (map != null)
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while (Children.Count < 2)
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{
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while (Children.Count < 2)
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Children.Add(new Image
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{
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Children.Add(new Image
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{
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Opacity = 0d,
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Stretch = Stretch.Fill
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});
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Opacity = 0d,
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Stretch = Stretch.Fill
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});
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}
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}
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else
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{
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updateTimer.Stop();
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ClearImages();
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Children.Clear();
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}
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base.SetParentMap(map);
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}
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protected override async void OnViewportChanged(ViewportChangedEventArgs e)
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{
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base.OnViewportChanged(e);
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if (e.ProjectionChanged)
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{
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ClearImages();
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await UpdateImageAsync(); // update immediately
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}
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else
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{
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updateTimer.Run(!UpdateWhileViewportChanging);
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}
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}
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protected abstract Task<ImageSource> GetImageAsync(Rect mapRect, IProgress<double> progress);
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protected async Task UpdateImageAsync()
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{
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if (!updateInProgress)
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{
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updateInProgress = true;
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updateTimer.Stop();
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ImageSource image = null;
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Rect? mapRect = null;
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if (ParentMap != null)
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{
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var width = ParentMap.ActualWidth * RelativeImageSize;
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var height = ParentMap.ActualHeight * RelativeImageSize;
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if (width > 0d && height > 0d)
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{
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var x = (ParentMap.ActualWidth - width) / 2d;
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var y = (ParentMap.ActualHeight - height) / 2d;
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mapRect = ParentMap.ViewTransform.ViewToMapBounds(new Rect(x, y, width, height));
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image = await GetImageAsync(mapRect.Value, loadingProgress);
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}
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}
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SwapImages(image, mapRect);
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updateInProgress = false;
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}
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else // update on next timer tick
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{
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updateTimer.Run();
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}
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}
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private void ClearImages()
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{
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foreach (var image in Children.OfType<Image>())
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{
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image.ClearValue(MapRectProperty);
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image.ClearValue(Image.SourceProperty);
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}
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}
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private void SwapImages(ImageSource image, Rect? mapRect)
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{
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if (Children.Count >= 2)
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{
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var topImage = (Image)Children[0];
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Children.RemoveAt(0);
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Children.Insert(1, topImage);
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topImage.Source = image;
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SetMapRect(topImage, mapRect);
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if (MapBase.ImageFadeDuration > TimeSpan.Zero)
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{
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FadeOver();
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}
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else
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{
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updateTimer.Stop();
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ClearImages();
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Children.Clear();
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}
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base.SetParentMap(map);
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}
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protected override async void OnViewportChanged(ViewportChangedEventArgs e)
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{
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base.OnViewportChanged(e);
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if (e.ProjectionChanged)
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{
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ClearImages();
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await UpdateImageAsync(); // update immediately
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}
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else
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{
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updateTimer.Run(!UpdateWhileViewportChanging);
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}
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}
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protected abstract Task<ImageSource> GetImageAsync(Rect mapRect, IProgress<double> progress);
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protected async Task UpdateImageAsync()
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{
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if (!updateInProgress)
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{
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updateInProgress = true;
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updateTimer.Stop();
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ImageSource image = null;
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Rect? mapRect = null;
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if (ParentMap != null)
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{
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var width = ParentMap.ActualWidth * RelativeImageSize;
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var height = ParentMap.ActualHeight * RelativeImageSize;
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if (width > 0d && height > 0d)
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{
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var x = (ParentMap.ActualWidth - width) / 2d;
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var y = (ParentMap.ActualHeight - height) / 2d;
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mapRect = ParentMap.ViewTransform.ViewToMapBounds(new Rect(x, y, width, height));
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image = await GetImageAsync(mapRect.Value, loadingProgress);
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}
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}
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SwapImages(image, mapRect);
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updateInProgress = false;
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}
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else // update on next timer tick
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{
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updateTimer.Run();
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}
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}
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private void ClearImages()
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{
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foreach (var image in Children.OfType<Image>())
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{
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image.ClearValue(MapRectProperty);
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image.ClearValue(Image.SourceProperty);
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}
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}
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private void SwapImages(ImageSource image, Rect? mapRect)
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{
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if (Children.Count >= 2)
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{
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var topImage = (Image)Children[0];
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Children.RemoveAt(0);
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Children.Insert(1, topImage);
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topImage.Source = image;
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SetMapRect(topImage, mapRect);
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if (MapBase.ImageFadeDuration > TimeSpan.Zero)
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{
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FadeOver();
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}
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else
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{
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topImage.Opacity = 1d;
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Children[0].Opacity = 0d;
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}
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topImage.Opacity = 1d;
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Children[0].Opacity = 0d;
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}
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}
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}
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