Question

如何将字符串放在多边形内？它将显示在MapOverlay。

中

private void DrawMapMarker(GeoCoordinate coordinate, Color color, MapLayer mapLayer)
{
    Polygon polygon = new Polygon();
    polygon.Points.Add(new Point(0, 0));
    polygon.Points.Add(new Point(0, 75));
    polygon.Points.Add(new Point(25, 0));
    polygon.Fill = new SolidColorBrush(color);
    polygon.DataContext = "HIIIIIII";

    // Enable marker to be tapped for location information
    polygon.Tag = new GeoCoordinate(coordinate.Latitude, coordinate.Longitude);
    polygon.MouseLeftButtonUp += polygon_MouseLeftButtonUp;

    // Create a MapOverlay and add marker.
    MapOverlay overlay = new MapOverlay();
    overlay.Content = polygon;
    overlay.GeoCoordinate = new GeoCoordinate(coordinate.Latitude, coordinate.Longitude);
    overlay.PositionOrigin = new Point(0.0, 1.0);
    mapLayer.Add(overlay);
}

Answer 1

只需使用某种面板（例如，StackPanel），并将多边形和TextBlock放入其中：

private void DrawMapMarker(GeoCoordinate coordinate, Color color, MapLayer mapLayer)
{
    var content = new Grid { Width = 25, Height = 75 };

    Polygon polygon = new Polygon();
    polygon.Points.Add(new Point(0, 0));
    polygon.Points.Add(new Point(0, 75));
    polygon.Points.Add(new Point(25, 0));
    polygon.Fill = new SolidColorBrush(color);

    var text = new TextBlock 
    { 
        Text = "HIIIIIII",
        Foreground = new SolidColorBrush(Colors.Orange),
    };
    var viewbox = new Viewbox { Child = text };
    content.Children.Add(polygon);
    content.Children.Add(viewbox);

    // Enable marker to be tapped for location information
    polygon.Tag = new GeoCoordinate(coordinate.Latitude, coordinate.Longitude);
    polygon.MouseLeftButtonUp += polygon_MouseLeftButtonUp;

    // Create a MapOverlay and add marker.
    MapOverlay overlay = new MapOverlay();
    overlay.Content = content;
    overlay.GeoCoordinate = new GeoCoordinate(coordinate.Latitude, coordinate.Longitude);
    overlay.PositionOrigin = new Point(0.0, 1.0);
    mapLayer.Add(overlay);
}

在多边形上显示字符串。

1 个答案: