private void MapControl_PointerWheelChanged(object sender, PointerRoutedEventArgs e)
{
if (ZoomLocked)
{
return;
}
if (!_viewportInitialized)
{
return;
}
var currentPoint = e.GetCurrentPoint(this);
//Needed for both MouseMove and MouseWheel event for mousewheel event
var mousePosition = new Geometries.Point(currentPoint.RawPosition.X, currentPoint.RawPosition.Y);
var newResolution = DetermineNewResolution(currentPoint.Properties.MouseWheelDelta, Map.Viewport.Resolution);
// 1) Temporarily center on the mouse position
Map.Viewport.Center = Map.Viewport.ScreenToWorld(mousePosition.X, mousePosition.Y);
// 2) Then zoom
Map.Viewport.Resolution = newResolution;
// 3) Then move the temporary center of the map back to the mouse position
Map.Viewport.Center = Map.Viewport.ScreenToWorld(
Map.Viewport.Width - mousePosition.X,
Map.Viewport.Height - mousePosition.Y);
e.Handled = true;
_map.ViewChanged(true);
OnViewChanged(true);
}
public void ZoomToBox(Geometries.Point beginPoint, Geometries.Point endPoint)
{
double x, y, resolution;
var width = Math.Abs(endPoint.X - beginPoint.X);
var height = Math.Abs(endPoint.Y - beginPoint.Y);
if (width <= 0)
{
return;
}
if (height <= 0)
{
return;
}
ZoomHelper.ZoomToBoudingbox(beginPoint.X, beginPoint.Y, endPoint.X, endPoint.Y, ActualWidth, out x, out y,
out resolution);
resolution = ZoomHelper.ClipToExtremes(_map.Resolutions, resolution);
Map.Viewport.Center = new Geometries.Point(x, y);
Map.Viewport.Resolution = resolution;
_map.ViewChanged(true);
OnViewChanged();
RefreshGraphics();
ClearBBoxDrawing();
}
private void _renderTarget_PaintSurface(object sender, SKPaintSurfaceEventArgs e)
{
if (!_viewportInitialized)
{
InitializeViewport();
}
if (!_viewportInitialized)
{
return; //stop if the line above failed.
}
if (!_invalid)
{
return;
}
if ((_renderer != null) && (_map != null))
{
if (_skiaScale == null)
{
_skiaScale = GetSkiaScale();
}
e.Surface.Canvas.Scale((float)_skiaScale.X, (float)_skiaScale.Y);
_renderer.Render(e.Surface.Canvas, Map.Viewport, _map.Layers, _map.BackColor);
_renderTarget.Arrange(new Rect(0, 0, Map.Viewport.Width, Map.Viewport.Height));
_invalid = false;
}
}
private void _renderTarget_PaintSurface(object sender, SKPaintSurfaceEventArgs e)
{
if (!_viewportInitialized) InitializeViewport();
if (!_viewportInitialized) return; //stop if the line above failed.
if (!_invalid) return;
if ((_renderer != null) && (_map != null))
{
if (_skiaScale == null) _skiaScale = GetSkiaScale();
e.Surface.Canvas.Scale((float)_skiaScale.X, (float)_skiaScale.Y);
_renderer.Render(e.Surface.Canvas, Map.Viewport, _map.Layers, _map.BackColor);
_renderTarget.Arrange(new Rect(0, 0, Map.Viewport.Width, Map.Viewport.Height));
_invalid = false;
}
}
private void MapControl_PointerWheelChanged(object sender, PointerRoutedEventArgs e)
{
if (ZoomLocked) return;
if (!_viewportInitialized) return;
var currentPoint = e.GetCurrentPoint(this);
//Needed for both MouseMove and MouseWheel event for mousewheel event
var mousePosition = new Geometries.Point(currentPoint.RawPosition.X, currentPoint.RawPosition.Y);
var newResolution = DetermineNewResolution(currentPoint.Properties.MouseWheelDelta, Map.Viewport.Resolution);
// 1) Temporarily center on the mouse position
Map.Viewport.Center = Map.Viewport.ScreenToWorld(mousePosition.X, mousePosition.Y);
// 2) Then zoom
Map.Viewport.Resolution = newResolution;
// 3) Then move the temporary center of the map back to the mouse position
Map.Viewport.Center = Map.Viewport.ScreenToWorld(
Map.Viewport.Width - mousePosition.X,
Map.Viewport.Height - mousePosition.Y);
e.Handled = true;
RefreshGraphics();
_map.ViewChanged(true);
OnViewChanged(true);
}
public Geometries.Point ScreenToWorld(Geometries.Point screenPosition)
{
return(SharedMapControl.ScreenToWorld(Map.Viewport, (float)_skiaScale.Y, screenPosition));
}
public Geometries.Point WorldToScreen(Geometries.Point worldPosition)
{
return(SharedMapControl.WorldToScreen(Map.Viewport, (float)_skiaScale.X, worldPosition));
}
