//private void OnPointerEntered (object sender, PointerRoutedEventArgs e)
//{
//}
//private void OnPointerExited (object sender, PointerRoutedEventArgs e)
//{
//}
private void OnPointerPressed(object sender, PointerRoutedEventArgs e)
{
if (!IsInputEnabled)
{
return;
}
// capture the pointer
CapturePointer(e.Pointer);
// create a new path and set the options
currentPath = new InkStroke(new PathGeometry(), new List <Point> (), StrokeColor, StrokeWidth);
tempPathShape.Data = currentPath.Path;
tempPathShape.Tag = currentPath;
SetPathProperties(tempPathShape);
// obtain the location of the touch
var point = e.GetCurrentPoint(this);
var touchX = point.Position.X;
var touchY = point.Position.Y;
// move to the touched point
currentPath.Path.MoveTo(touchX, touchY);
currentPath.GetPoints().Add(point.Position);
// update the dirty rectangle
ResetBounds((float)touchX, (float)touchY);
}
public override void TouchesBegan(NSSet touches, UIEvent evt)
{
singleTapNeeded = false;
// create a new path and set the options
currentPath = new InkStroke(UIBezierPath.Create(), new List <CGPoint> (), StrokeColor, StrokeWidth);
// obtain the location of the touch
var touch = touches.AnyObject as UITouch;
var touchLocation = touch.LocationInView(this);
// move the path to that position
currentPath.Path.MoveTo(touchLocation);
currentPath.GetPoints().Add(touchLocation);
// update the dirty rectangle
ResetBounds(touchLocation);
Console.WriteLine("InkPresenter: Touches Began");
if (touch != null)
{
Console.WriteLine($"InkPresenter: TapCount: {touch.TapCount}");
if (touch.TapCount == 2)
{
OnDoubleTapped();
}
}
}
// private methods
private bool HasMovedFarEnough(InkStroke stroke, double touchX, double touchY)
{
var lastPoint = stroke.GetPoints().LastOrDefault();
var deltaX = touchX - lastPoint.X;
var deltaY = touchY - lastPoint.Y;
var distance = Math.Sqrt(Math.Pow(deltaX, 2) + Math.Pow(deltaY, 2));
return(distance >= MinimumPointDistance);
}
public override void TouchesBegan(NSSet touches, UIEvent evt)
{
// create a new path and set the options
currentPath = new InkStroke(UIBezierPath.Create(), new List <CGPoint> (), StrokeColor, StrokeWidth);
// obtain the location of the touch
var touch = touches.AnyObject as UITouch;
var touchLocation = touch.LocationInView(this);
// move the path to that position
currentPath.Path.MoveTo(touchLocation);
currentPath.GetPoints().Add(touchLocation);
// update the dirty rectangle
ResetBounds(touchLocation);
}
private void TouchesBegan(MotionEvent e)
{
// create a new path and set the options
currentPath = new InkStroke(new Path(), new List <System.Drawing.PointF> (), StrokeColor, StrokeWidth);
// obtain the location of the touch
float touchX = e.GetX();
float touchY = e.GetY();
// move to the touched point
currentPath.Path.MoveTo(touchX, touchY);
currentPath.GetPoints().Add(new System.Drawing.PointF(touchX, touchY));
// update the dirty rectangle
ResetBounds(touchX, touchY);
Invalidate(DirtyRect);
}
private void TouchesBegan(MotionEvent e)
{
// don't allow the event to propagate because we're handling it here
Parent?.RequestDisallowInterceptTouchEvent(true);
// create a new path and set the options
currentPath = new InkStroke(new Path(), new List <System.Drawing.PointF> (), StrokeColor, StrokeWidth);
// obtain the location of the touch
float touchX = e.GetX();
float touchY = e.GetY();
// move to the touched point
currentPath.Path.MoveTo(touchX, touchY);
currentPath.GetPoints().Add(new System.Drawing.PointF(touchX, touchY));
// update the dirty rectangle
ResetBounds(touchX, touchY);
Invalidate(DirtyRect);
}
public override void TouchesBegan(NSSet touches, UIEvent evt)
{
// create a new path and set the options
currentPath = new InkStroke(UIBezierPath.Create(), new List <InkPoint> (), StrokeColor, StrokeWidth, InkSource.Touch, DateTime.UtcNow);
// obtain the location of the touch
var touch = touches.AnyObject as UITouch;
var touchLocation = touch.LocationInView(this);
// move the path to that position
currentPath.Path.MoveTo(touchLocation);
currentPath.GetPoints().Add(new InkPoint(
touchLocation,
(float)touch.Force,
null,
TimeSpan.FromSeconds(touch.Timestamp)));
// update the dirty rectangle
ResetBounds(touchLocation);
}
public override async void TouchesEnded(NSSet touches, UIEvent evt)
{
// obtain the location of the touch
var touch = touches.AnyObject as UITouch;
var touchLocation = touch.LocationInView(this);
// something may have happened (clear) during the stroke
if (currentPath != null)
{
if (HasMovedFarEnough(currentPath, touchLocation.X, touchLocation.Y))
{
// add it to the current path
currentPath.Path.AddLineTo(touchLocation);
currentPath.GetPoints().Add(touchLocation);
}
else if (touch.TapCount == 1)
{
// Single Tap
singleTapNeeded = true;
await Task.Delay(300);
if (singleTapNeeded)
{
//CGRect r = new CGRect (touchLocation.X, touchLocation.Y, StrokeWidth, StrokeWidth);
//var c = UIBezierPath.FromOval (r);
var s = new InkStroke(new UIBezierPath(), new List <CGPoint> (), StrokeColor, StrokeWidth);
s.Path.MoveTo(touchLocation);
s.GetPoints().Add(touchLocation);
var dest = new CGPoint(touchLocation.X + StrokeWidth, touchLocation.Y + StrokeWidth);
s.Path.AddLineTo(dest);
s.GetPoints().Add(dest);
paths.Add(s);
s = new InkStroke(new UIBezierPath(), new List <CGPoint> (), StrokeColor, StrokeWidth);
var src = new CGPoint(touchLocation.X + StrokeWidth, touchLocation.Y);
s.Path.MoveTo(src);
s.GetPoints().Add(src);
dest = new CGPoint(touchLocation.X, touchLocation.Y + StrokeWidth);
s.Path.AddLineTo(dest);
s.GetPoints().Add(dest);
paths.Add(s);
}
;
}
// obtain the smoothed path, and add it to the old paths
if (currentPath != null)
{
var smoothed = PathSmoothing.SmoothedPathWithGranularity(currentPath, 4);
paths.Add(smoothed);
}
}
// clear the current path
currentPath = null;
// update the dirty rectangle
UpdateBounds(touchLocation);
SetNeedsDisplay();
// we are done with drawing
OnStrokeCompleted();
}