protected override void UpdateData()
{
var geometry = (RectangleGeometry)Data;
if (ParentMap != null &&
!double.IsNaN(South) && !double.IsNaN(North) &&
!double.IsNaN(West) && !double.IsNaN(East) &&
South < North && West < East)
{
// Create a scaled RectangleGeometry due to inaccurate hit testing in WPF.
// See http://stackoverflow.com/a/19335624/1136211
const double scale = 1e6;
var p1 = ParentMap.MapTransform.Transform(new Location(South, West));
var p2 = ParentMap.MapTransform.Transform(new Location(North, East));
geometry.Rect = new Rect(p1.X * scale, p1.Y * scale, (p2.X - p1.X) * scale, (p2.Y - p1.Y) * scale);
var scaleTransform = new ScaleTransform // revert scaling
{
ScaleX = 1d / scale,
ScaleY = 1d / scale
};
scaleTransform.Freeze();
var transform = new TransformGroup();
transform.Children.Add(scaleTransform);
transform.Children.Add(ParentMap.ViewportTransform);
RenderTransform = transform;
}
else
{
geometry.ClearValue(RectangleGeometry.RectProperty);
ClearValue(RenderTransformProperty);
}
}
protected override void UpdateData()
{
var geometry = (RectangleGeometry)Data;
if (ParentMap != null &&
!double.IsNaN(South) && !double.IsNaN(North) &&
!double.IsNaN(West) && !double.IsNaN(East) &&
South < North && West < East)
{
// Create a scaled RectangleGeometry due to inaccurate hit testing in WPF.
// See http://stackoverflow.com/a/19335624/1136211
const double scale = 1e6;
var p1 = ParentMap.MapTransform.Transform(new Location(South, West));
var p2 = ParentMap.MapTransform.Transform(new Location(North, East));
geometry.Rect = new Rect(p1.X * scale, p1.Y * scale, (p2.X - p1.X) * scale, (p2.Y - p1.Y) * scale);
var scaleTransform = new ScaleTransform // revert scaling
{
ScaleX = 1d / scale,
ScaleY = 1d / scale
};
scaleTransform.Freeze();
var transform = new TransformGroup();
transform.Children.Add(scaleTransform);
transform.Children.Add(ParentMap.ViewportTransform);
RenderTransform = transform;
}
else
{
geometry.ClearValue(RectangleGeometry.RectProperty);
ClearValue(RenderTransformProperty);
}
}
