/// <summary>
/// Zooms to the given list of markers.
/// </summary>
/// <param name="controls"></param>
/// <param name="percentage"></param>
public void ZoomToControls(List <MapControl> controls, double percentage)
{
try
{
if (this.SurfaceWidth > 0 && _bufferFactor > 0)
{
float height = this.SurfaceHeight / _bufferFactor;
float width = this.SurfaceWidth / _bufferFactor;
var points = new PointF2D[controls.Count];
for (int idx = 0; idx < controls.Count; idx++)
{
points[idx] = new PointF2D(this.Map.Projection.ToPixel(controls[idx].Location));
}
var view = this.CreateView();
var fittedView = view.Fit(points, percentage);
var zoom = (float)this.Map.Projection.ToZoomLevel(fittedView.CalculateZoom(
width, height));
var center = this.Map.Projection.ToGeoCoordinates(
fittedView.Center[0], fittedView.Center[1]);
this.SetMapView(center, this.MapTilt, zoom);
}
else
{
_latestZoomCall = new MapViewControlZoomEvent()
{
Controls = controls,
Percentage = percentage
};
}
}
catch (Exception ex)
{
OsmSharp.Logging.Log.TraceEvent("MapViewSurface.ZoomToMarkers", TraceEventType.Critical,
string.Format("An unhandled exception occured:{0}", ex.ToString()));
}
}
/// <summary>
/// Zooms to the given list of markers.
/// </summary>
/// <param name="controls"></param>
/// <param name="percentage"></param>
public void ZoomToControls(List<MapControl> controls, double percentage)
{
try
{
if (this.SurfaceWidth > 0 && _bufferFactor > 0)
{
float height = this.SurfaceHeight / _bufferFactor;
float width = this.SurfaceWidth / _bufferFactor;
var points = new PointF2D[controls.Count];
for (int idx = 0; idx < controls.Count; idx++)
{
points[idx] = new PointF2D(this.Map.Projection.ToPixel(controls[idx].Location));
}
var view = this.CreateView();
var fittedView = view.Fit(points, percentage);
var zoom = (float)this.Map.Projection.ToZoomLevel(fittedView.CalculateZoom(
width, height));
var center = this.Map.Projection.ToGeoCoordinates(
fittedView.Center[0], fittedView.Center[1]);
this.SetMapView(center, this.MapTilt, zoom);
}
else
{
_latestZoomCall = new MapViewControlZoomEvent()
{
Controls = controls,
Percentage = percentage
};
}
}
catch (Exception ex)
{
OsmSharp.Logging.Log.TraceEvent("MapViewSurface.ZoomToMarkers", TraceEventType.Critical,
string.Format("An unhandled exception occured:{0}", ex.ToString()));
}
}
/// <summary>
/// Raises the layout event.
/// </summary>
/// <param name="changed">If set to <c>true</c> changed.</param>
/// <param name="left">Left.</param>
/// <param name="top">Top.</param>
/// <param name="right">Right.</param>
/// <param name="bottom">Bottom.</param>
protected override void OnLayout(bool changed, int left, int top, int right, int bottom)
{
// execute suspended events.
if (_latestZoomCall != null)
{ // there was a suspended call.
var latestZoomCall = _latestZoomCall;
_latestZoomCall = null;
this.ZoomToControls(
latestZoomCall.Controls,
latestZoomCall.Percentage);
}
if (_onScreenBuffer == null)
{
this.TriggerRendering(); // force a rendering on the first layout-event.
}
}
