public override async void ViewDidLoad()
{
base.ViewDidLoad();
CanvasView.PaintSurface += CanvasView_PaintSurface;
var pan = new NSPanGestureRecognizer(MapPanned);
var zoom = new NSMagnificationGestureRecognizer(MapZoomed);
_screenScale = (float)NSScreen.MainScreen.BackingScaleFactor;
_canvasSize = new SKSize(20000, 2000);
CanvasView.AddGestureRecognizer(zoom);
CanvasView.AddGestureRecognizer(pan);
//load images
for (int i = 1; i < 16; i++)
{
var img = await ImageService.Instance.LoadFileFromApplicationBundle("img/img" + i + ".jpg").AsNSImageAsync();
var sizeRandom = rand.NextDouble() * (1.2 - 0.2) + 0.2;
var size = new SKSize((float)(img.Size.Width * sizeRandom), (float)(img.Size.Height * sizeRandom));
var rect = SKRect.Empty;
rect.Size = size;
var pointRandomW = rand.NextDouble() * (_canvasSize.Width - 0) + 0;
var pointRandomH = rand.NextDouble() * (_canvasSize.Height - 0) + 0;
rect.Location = new SKPoint((float)pointRandomW, (float)pointRandomH);
rects.Add(rect);
imgs.Add(img.ToSKImage());
}
}
void MapZoomed(NSMagnificationGestureRecognizer obj)
{
var p = obj.LocationInView(CanvasView);
var mouseLocation = NSEvent.CurrentMouseLocation;
var pp = new SKPoint((float)(_canvasSize.Width * p.X / CanvasView.Bounds.Width),
(float)(_canvasSize.Height - (_canvasSize.Height * p.Y / CanvasView.Bounds.Height)));
pp = _im.MapPoint(pp);
var mouseCursorX = (float)p.X;
var mouseCursorY = (float)(CanvasView.Frame.Height - p.Y);
if (obj.State == NSGestureRecognizerState.Began)
{
StartPanZoom(new SKPoint(mouseCursorX, mouseCursorY));
}
else if (obj.State == NSGestureRecognizerState.Changed)
{
var x = obj.Magnification + 1;
DoPanZoom(_startM, _startAnchorPt, _totalDistance, x);
}
else if (obj.State == NSGestureRecognizerState.Cancelled)
{
_isPanZoom = false;
_m.TryInvert(out _im);
}
else if (obj.State == NSGestureRecognizerState.Ended)
{
_isPanZoom = false;
_m.TryInvert(out _im);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="PinchRecognizer"/> class.
/// </summary>
/// <param name="view">The native view.</param>
public PinchRecognizer(NSView view) : base(view)
{
_recognizer = new NSMagnificationGestureRecognizer(OnPinching);
view.AddGestureRecognizer(_recognizer);
void OnPinching(NSMagnificationGestureRecognizer recognizer)
{
var point = recognizer.LocationInView(View);
switch (recognizer.State)
{
case NSGestureRecognizerState.Began:
OnTouchesBegan(point.X, point.Y);
OnPinchingBegan(point.X, point.Y);
break;
case NSGestureRecognizerState.Changed:
OnPinchingScaleChanged(recognizer.Magnification);
break;
case NSGestureRecognizerState.Cancelled:
OnPinchingStateChanged(GestureState.Cancelled);
OnTouchesEnded(point.X, point.Y);
break;
case NSGestureRecognizerState.Failed:
OnPinchingStateChanged(GestureState.Failed);
OnTouchesEnded(point.X, point.Y);
break;
case NSGestureRecognizerState.Ended:
OnPinchingStateChanged(GestureState.Ended);
OnTouchesEnded(point.X, point.Y);
break;
}
}
}
NSMagnificationGestureRecognizer CreatePinchRecognizer(Action <NSMagnificationGestureRecognizer> action)
{
var result = new NSMagnificationGestureRecognizer(action);
return(result);
}