public void Move(Point pPoint)
{
PointF delta = pPoint.ToPointF().Subtract(m_startDrag);
m_window.SetZoom(m_window.magnification + delta.X / 300f, true);
m_startDrag = pPoint.ToPointF();
}
private void AddPosition(Point pt)
{
double heading = double.NaN;
if (lastPoint != default(Point))
{
var l = new Line
{
X1 = pt.X,
Y1 = pt.Y,
X2 = lastPoint.X,
Y2 = lastPoint.Y
};
l.Stroke = Brushes.Magenta;
l.StrokeThickness = 0.4;
canvas.Children.Insert(canvas.Children.Count - 1, l);
heading = Math2.GetPolarHeadingFromLine(pt.ToPointF(), lastPoint.ToPointF());
}
Ellipse dot = new Ellipse();
dot.Fill = Brushes.Gray;
dot.Height = dot.Width = 1;
Canvas.SetTop(dot, pt.Y - dot.Height / 2);
Canvas.SetLeft(dot, pt.X - dot.Width / 2);
canvas.Children.Add(dot);
lastPoint = pt;
}
public NFeature[] QueryFeatures(Point point, params string[] layers)
{
var xpoint = point.ToPointF();
var features = map.QueryRenderedFeatures(xpoint, layers);
xpoint.Dispose();
return(features.Select(f => f.ToFeature(true)).ToArray());
}
public NFeature[] QueryFeatures(Point point, float radius, params string[] layers)
{
var xpoint = point.ToPointF();
var region = xpoint.ToRectF(radius);
xpoint.Dispose();
var features = map.QueryRenderedFeatures(region, layers);
region.Dispose();
return(features.Select(f => f.ToFeature(true)).ToArray());
}
public static Point GetPointDistanceAwayOnLine(this Point startPt, double length, Point linePoint, Point closerToPoint)
{
PointF int1, int2;
Regression.FindLineCircleIntersections((float)startPt.X, (float)startPt.Y, (float)length,
startPt.ToPointF(), linePoint.ToPointF(), out int1, out int2);
var result =
int1.ToPoint().Distance(closerToPoint) < int2.ToPoint().Distance(closerToPoint) ?
int1 : int2;
return(result.ToPoint());
}
void OnScrollToRequested(object sender, ScrollToRequestedEventArgs e)
{
if (Superview == null)
{
_requestedScroll = e;
return;
}
Point scrollPoint = (e.Mode == ScrollToMode.Position)
? new Point(e.ScrollX, Element.Height - e.ScrollY)
: ScrollView.GetScrollPositionForElement(e.Element as VisualElement, e.Position);
ContentView.ScrollToPoint(scrollPoint.ToPointF());
ScrollView.SendScrollFinished();
}
public PointF PixelToPoint(Point pixel)
{
if (DrawLimits.IsNaN())
{
return(PointF_Extension.NaN);
}
else
{
Matrix transform = Transform;
PointF[] points = new PointF[] { pixel.ToPointF() };
transform.Invert();
transform.TransformPoints(points);
return(points[0]);
}
}
private static void DrawCircle(Point start, Point finish, Graphics g, double cosPhi, double r)
{
var angel = (float)(Math.Acos(cosPhi) * 180 / Math.PI);
if (finish.Y > start.Y)
{
angel = 360 - angel;
}
var p = new Pen(Color.Green);
g.DrawLine(p, start.ToPointF(), finish.ToPointF());
var textPoint = new PointF((float)(start.X + r / 4 - 16), (float)start.Y - 16);
g.DrawString(angel.ToString("#.##°"), new Font("Consolas", 10), p.Brush, textPoint);
g.DrawPie(p, (float)(start.X - r / 2), (float)(start.Y - r / 2), (float)r, (float)r, 360 - angel, angel);
}
private void AddPosition(Point pt, bool save = true)
{
double heading = double.NaN;
if (lastPoint != default(Point))
{
var l = new Line
{
X1 = pt.X,
Y1 = pt.Y,
X2 = lastPoint.X,
Y2 = lastPoint.Y
};
l.Stroke = Brushes.Blue;
l.StrokeThickness = 1;
canvas.Children.Insert(canvas.Children.Count - 1, l);
heading = Math2.GetPolarHeadingFromLine(pt.ToPointF(), lastPoint.ToPointF());
}
Ellipse dot = new Ellipse();
dot.Fill = Brushes.Red;
dot.Height = dot.Width = 2;
Canvas.SetTop(dot, pt.Y - dot.Height / 2);
Canvas.SetLeft(dot, pt.X - dot.Width / 2);
canvas.Children.Add(dot);
lastPoint = pt;
if (save)
{
Positions.Add(new Position {
pt = pt
});
Points.Add(new System.Drawing.PointF((float)pt.X * Metrics.SCALE_Map4_20_TO_100, (float)pt.Y * Metrics.SCALE_Map4_20_TO_100));
}
}
public void Begin(Point pPoint)
{
m_startDrag = pPoint.ToPointF();
}
public void Move(Point pPoint)
{
PointF delta = pPoint.ToPointF().Subtract(m_startDrag);
m_window.SetZoom(m_window.magnification + delta.X / 300f, true);
m_startDrag = pPoint.ToPointF();
}
public void Begin(Point pPoint)
{
m_startDrag = pPoint.ToPointF();
}
public PointF PixelToPoint(Point pixel)
{
if (DrawLimits.IsNaN())
return PointF_Extension.NaN;
else
{
Matrix transform = Transform;
PointF[] points = new PointF[] { pixel.ToPointF() };
transform.Invert();
transform.TransformPoints(points);
return points[0];
}
}
private void drawArc(Graphics graphics, Pen pen, Pen arrowPen, Point a, Point b)
{
const decimal f = 0.05m;
Point c = new Point((a.X + b.X) / 2m + f * (b.Y - a.Y), (a.Y + b.Y) / 2m - f * (b.X - a.X));
double angle = Math.Atan2((double)(b.Y - c.Y), (double)(b.X - c.X));
Point d = new Point(b.X - 10 * (decimal)Math.Cos(angle), b.Y - 10 * (decimal)Math.Sin(angle));
graphics.DrawCurve(pen, new PointF[] { a.ToPointF(), c.ToPointF(), b.ToPointF() }, 1f);
graphics.DrawLine(arrowPen, d.ToPointF(), b.ToPointF());
}
