XAML-Map-Control/MapControl/WPF/MapBase.WPF.cs

// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
// © 2018 Clemens Fischer
// Licensed under the Microsoft Public License (Ms-PL)

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace MapControl
{
    public partial class MapBase
    {
        public static readonly DependencyProperty ForegroundProperty =
            Control.ForegroundProperty.AddOwner(typeof(MapBase));

        public static readonly DependencyProperty CenterProperty = DependencyProperty.Register(
            nameof(Center), typeof(Location), typeof(MapBase), new FrameworkPropertyMetadata(
                new Location(), FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
                (o, e) => ((MapBase)o).CenterPropertyChanged((Location)e.NewValue)));

        public static readonly DependencyProperty TargetCenterProperty = DependencyProperty.Register(
            nameof(TargetCenter), typeof(Location), typeof(MapBase), new FrameworkPropertyMetadata(
                new Location(), FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
                (o, e) => ((MapBase)o).TargetCenterPropertyChanged((Location)e.NewValue)));

        public static readonly DependencyProperty ZoomLevelProperty = DependencyProperty.Register(
            nameof(ZoomLevel), typeof(double), typeof(MapBase), new FrameworkPropertyMetadata(
                1d, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
                (o, e) => ((MapBase)o).ZoomLevelPropertyChanged((double)e.NewValue)));

        public static readonly DependencyProperty TargetZoomLevelProperty = DependencyProperty.Register(
            nameof(TargetZoomLevel), typeof(double), typeof(MapBase), new FrameworkPropertyMetadata(
                1d, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
                (o, e) => ((MapBase)o).TargetZoomLevelPropertyChanged((double)e.NewValue)));

        public static readonly DependencyProperty HeadingProperty = DependencyProperty.Register(
            nameof(Heading), typeof(double), typeof(MapBase), new FrameworkPropertyMetadata(
                0d, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
                (o, e) => ((MapBase)o).HeadingPropertyChanged((double)e.NewValue)));

        public static readonly DependencyProperty TargetHeadingProperty = DependencyProperty.Register(
            nameof(TargetHeading), typeof(double), typeof(MapBase), new FrameworkPropertyMetadata(
                0d, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
                (o, e) => ((MapBase)o).TargetHeadingPropertyChanged((double)e.NewValue)));

        static MapBase()
        {
            ClipToBoundsProperty.OverrideMetadata(typeof(MapBase), new FrameworkPropertyMetadata(true));
            BackgroundProperty.OverrideMetadata(typeof(MapBase), new FrameworkPropertyMetadata(Brushes.Transparent));
        }

        public MapBase()
        {
            MapProjection = new WebMercatorProjection();
            ScaleRotateTransform.Children.Add(ScaleTransform);
            ScaleRotateTransform.Children.Add(RotateTransform);
        }

        /// <summary>
        /// Changes the Center property according to the specified translation in viewport coordinates.
        /// </summary>
        public void TranslateMap(Vector translation)
        {
            TranslateMap((Point)translation);
        }

        /// <summary>
        /// Changes the Center, Heading and ZoomLevel properties according to the specified
        /// viewport coordinate translation, rotation and scale delta values. Rotation and scaling
        /// is performed relative to the specified center point in viewport coordinates.
        /// </summary>
        public void TransformMap(Point center, Vector translation, double rotation, double scale)
        {
            TransformMap(center, (Point)translation, rotation, scale);
        }

        protected override void OnRenderSizeChanged(SizeChangedInfo sizeInfo)
        {
            base.OnRenderSizeChanged(sizeInfo);

            ResetTransformCenter();
            UpdateTransform();
        }
    }
}