private void TargetCenterPropertyChanged(Location targetCenter)
{
if (!internalPropertyChange)
{
AdjustCenterProperty(TargetCenterProperty, ref targetCenter);
if (!targetCenter.Equals(Center))
{
if (centerAnimation != null)
{
centerAnimation.Completed -= CenterAnimationCompleted;
}
// animate private CenterPoint property by PointAnimation
centerAnimation = new PointAnimation
{
From = MapTransform.Transform(Center),
To = MapTransform.Transform(targetCenter, Center.Longitude),
Duration = AnimationDuration,
EasingFunction = AnimationEasingFunction,
FillBehavior = FillBehavior.HoldEnd
};
centerAnimation.Completed += CenterAnimationCompleted;
this.BeginAnimation(CenterPointProperty, centerAnimation);
}
}
}
private void CenterPointPropertyChanged(Point centerPoint)
{
if (!internalPropertyChange)
{
centerPoint.X = Location.NormalizeLongitude(centerPoint.X);
InternalSetValue(CenterProperty, MapTransform.Transform(centerPoint));
ResetTransformOrigin();
UpdateTransform();
}
}
private void CenterAnimationCompleted(object sender, object e)
{
if (centerAnimation != null)
{
centerAnimation.Completed -= CenterAnimationCompleted;
centerAnimation = null;
InternalSetValue(CenterProperty, TargetCenter);
InternalSetValue(CenterPointProperty, MapTransform.Transform(TargetCenter));
RemoveAnimation(CenterPointProperty); // remove holding animation in WPF
ResetTransformOrigin();
UpdateTransform();
}
}
private void CenterPropertyChanged(Location center)
{
if (!internalPropertyChange)
{
AdjustCenterProperty(CenterProperty, ref center);
ResetTransformOrigin();
UpdateTransform();
if (centerAnimation == null)
{
InternalSetValue(TargetCenterProperty, center);
InternalSetValue(CenterPointProperty, MapTransform.Transform(center));
}
}
}
/// <summary>
/// Sets the TargetZoomLevel and TargetCenter properties such that the specified bounding box
/// fits into the current viewport. The TargetHeading property is set to zero.
/// </summary>
public void ZoomToBounds(Location southWest, Location northEast)
{
if (southWest.Latitude < northEast.Latitude && southWest.Longitude < northEast.Longitude)
{
var p1 = MapTransform.Transform(southWest);
var p2 = MapTransform.Transform(northEast);
var lonScale = RenderSize.Width / (p2.X - p1.X) * 360d / TileSource.TileSize;
var latScale = RenderSize.Height / (p2.Y - p1.Y) * 360d / TileSource.TileSize;
var lonZoom = Math.Log(lonScale, 2d);
var latZoom = Math.Log(latScale, 2d);
TargetZoomLevel = Math.Min(lonZoom, latZoom);
TargetCenter = MapTransform.Transform(new Point((p1.X + p2.X) / 2d, (p1.Y + p2.Y) / 2d));
TargetHeading = 0d;
}
}
private void UpdateTransform(bool resetTransformOrigin = false)
{
var center = Center;
SetViewportTransform(transformOrigin ?? center);
if (transformOrigin != null)
{
center = ViewportPointToLocation(new Point(RenderSize.Width / 2d, RenderSize.Height / 2d));
center.Longitude = Location.NormalizeLongitude(center.Longitude);
if (center.Latitude < -mapTransform.MaxLatitude || center.Latitude > mapTransform.MaxLatitude)
{
center.Latitude = Math.Min(Math.Max(center.Latitude, -mapTransform.MaxLatitude), mapTransform.MaxLatitude);
resetTransformOrigin = true;
}
InternalSetValue(CenterProperty, center);
if (centerAnimation == null)
{
InternalSetValue(TargetCenterProperty, center);
InternalSetValue(CenterPointProperty, MapTransform.Transform(center));
}
if (resetTransformOrigin)
{
ResetTransformOrigin();
SetViewportTransform(center);
}
}
CenterScale = ViewportScale * mapTransform.RelativeScale(center) / TileSource.MetersPerDegree; // Pixels per meter at center latitude
SetTransformMatrixes();
OnViewportChanged();
}
