ClemensFischer/XAML-Map-Control
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Partial class Map

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ClemensFischer 2025-06-12 07:41:01 +02:00
parent cceb122486
commit 5777e9cff3
6 changed files with 101 additions and 158 deletions
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74
MapControl/Avalonia/Map.Avalonia.cs
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@ -12,68 +12,28 @@ namespace MapControl
All = Translate | Rotate | Scale
}
/// <summary>
/// MapBase with default input event handling.
/// </summary>
public class Map : MapBase
public partial class Map
{
public static readonly StyledProperty<ManipulationModes> ManipulationModesProperty =
DependencyPropertyHelper.Register<Map, ManipulationModes>(nameof(ManipulationModes), ManipulationModes.Translate | ManipulationModes.Scale);
public static readonly StyledProperty<ManipulationModes> ManipulationModeProperty =
DependencyPropertyHelper.Register<Map, ManipulationModes>(nameof(ManipulationMode), ManipulationModes.Translate | ManipulationModes.Scale);
public static readonly StyledProperty<double> MouseWheelZoomDeltaProperty =
DependencyPropertyHelper.Register<Map, double>(nameof(MouseWheelZoomDelta), 0.25);
public static readonly DependencyProperty MouseWheelZoomAnimatedProperty =
DependencyPropertyHelper.Register<Map, bool>(nameof(MouseWheelZoomAnimated), true);
/// <summary>
/// Gets or sets a value that specifies how the map control handles manipulations.
/// </summary>
public ManipulationModes ManipulationMode
{
get => GetValue(ManipulationModeProperty);
set => SetValue(ManipulationModeProperty, value);
}
private IPointer pointer1;
private IPointer pointer2;
private Point position1;
private Point position2;
public ManipulationModes ManipulationModes
{
get => GetValue(ManipulationModesProperty);
set => SetValue(ManipulationModesProperty, value);
}
/// <summary>
/// Gets or sets the amount by which the ZoomLevel property changes by a PointerWheelChanged event.
/// The default value is 0.25.
/// </summary>
public double MouseWheelZoomDelta
{
get => GetValue(MouseWheelZoomDeltaProperty);
set => SetValue(MouseWheelZoomDeltaProperty, value);
}
/// <summary>
/// Gets or sets a value that controls whether zooming by a PointerWheelChanged event is animated.
/// The default value is true.
/// </summary>
public bool MouseWheelZoomAnimated
{
get => (bool)GetValue(MouseWheelZoomAnimatedProperty);
set => SetValue(MouseWheelZoomAnimatedProperty, value);
}
protected override void OnPointerWheelChanged(PointerWheelEventArgs e)
{
var delta = e.Delta.Y;
var zoomLevel = TargetZoomLevel + MouseWheelZoomDelta * delta;
var animated = false;
if (delta % 1d == 0d)
{
// Zoom to integer multiple of MouseWheelZoomDelta when delta is an integer value,
// i.e. when the event was actually raised by a mouse wheel and not by a touch pad
// or a similar device with higher resolution.
//
zoomLevel = MouseWheelZoomDelta * Math.Round(zoomLevel / MouseWheelZoomDelta);
animated = MouseWheelZoomAnimated;
}
ZoomMap(e.GetPosition(this), zoomLevel, animated);
OnMouseWheel(e.GetPosition(this), e.Delta.Y);
base.OnPointerWheelChanged(e);
}
@ -89,7 +49,7 @@ namespace MapControl
HandleManipulation(point.Pointer, point.Position);
}
else if (point.Pointer.Type == PointerType.Mouse ||
ManipulationModes.HasFlag(ManipulationModes.Translate))
ManipulationMode.HasFlag(ManipulationModes.Translate))
{
TranslateMap(new Point(point.Position.X - position1.X, point.Position.Y - position1.Y));
position1 = point.Position;
@ -101,7 +61,7 @@ namespace MapControl
e.KeyModifiers == KeyModifiers.None ||
pointer2 == null &&
point.Pointer.Type == PointerType.Touch &&
ManipulationModes != ManipulationModes.None)
ManipulationMode != ManipulationModes.None)
{
point.Pointer.Capture(this);
@ -156,19 +116,19 @@ namespace MapControl
var rotation = 0d;
var scale = 1d;
if (ManipulationModes.HasFlag(ManipulationModes.Translate))
if (ManipulationMode.HasFlag(ManipulationModes.Translate))
{
newOrigin = new Point((position1.X + position2.X) / 2d, (position1.Y + position2.Y) / 2d);
translation = newOrigin - oldOrigin;
}
if (ManipulationModes.HasFlag(ManipulationModes.Rotate))
if (ManipulationMode.HasFlag(ManipulationModes.Rotate))
{
rotation = 180d / Math.PI
* (Math.Atan2(newDistance.Y, newDistance.X) - Math.Atan2(oldDistance.Y, oldDistance.X));
}
if (ManipulationModes.HasFlag(ManipulationModes.Scale))
if (ManipulationMode.HasFlag(ManipulationModes.Scale))
{
scale = newDistance.Length / oldDistance.Length;
}