using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
namespace WPScadaControlsV2
{
internal class RadialScaleHelper
{
public static Point GetCenterPosition(RadialType type, Size finalSize, double minAngle, double maxAngle, SweepDirection sweepDir)
{
//get the quadrants of the limits
int q1 = GetQuadrant(minAngle);
int q2 = GetQuadrant(maxAngle);
if (sweepDir == SweepDirection.Counterclockwise)
{
q1++; q2++;
if (q1 > 4) q1 = 1;
if (q2 > 4) q2 = 1;
}
else
{
//q2->q4 and q4->q2
if (q1 % 2 == 0) q1 = 6 - q1;
if (q2 % 2 == 0) q2 = 6 - q2;
}
//calculate the difference
int diff = q2 - q1;
if (Math.Abs(diff) == 0)
{//quarter possibility
if (type == RadialType.Quadrant)
{
return GetCenterForQuadrant(q2, finalSize);
}
else if (type == RadialType.Semicircle)
{
if (q1 == 1 || q1 == 2)
return new Point(finalSize.Width / 2, finalSize.Height);
else
return new Point(finalSize.Width / 2, 0);
}
else
{
//full circle
return new Point(finalSize.Width / 2, finalSize.Height / 2);
}
}
else if (Math.Abs(diff) == 1 || (Math.Abs(diff)==3 && (maxAngle-minAngle)<=180))
{//semicircle possibility
if (type == RadialType.Quadrant || type == RadialType.Semicircle)
{
return GetCenterForSemicircle(q1, q2, finalSize);
}
else
{
//full circle
return new Point(finalSize.Width / 2, finalSize.Height / 2);
}
}
else
{
//full circle
return new Point(finalSize.Width / 2, finalSize.Height / 2);
}
}
public static double GetRadius(RadialType type, Size finalSize, double minAngle, double maxAngle, SweepDirection sweepDir)
{
//get the quadrants of the limits
int q1 = GetQuadrant(minAngle);
int q2 = GetQuadrant(maxAngle);
if (sweepDir == SweepDirection.Counterclockwise)
{
q1++; q2++;
if (q1 > 4) q1 = 1;
if (q2 > 4) q2 = 1;
}
else
{
//q2->q4 and q4->q2
if (q1 % 2 == 0) q1 = 6 - q1;
if (q2 % 2 == 0) q2 = 6 - q2;
}
//calculate the difference
int diff = q2 - q1;
if (Math.Abs(diff) == 0)
{//quarter possibility
if (type == RadialType.Quadrant)
{
return Math.Min(finalSize.Width, finalSize.Height);
}
else if (type == RadialType.Semicircle)
{
return finalSize.Height;
}
else
{//full circle
return Math.Min(finalSize.Width / 2, finalSize.Height / 2);
}
}
else if (Math.Abs(diff) == 1 || (Math.Abs(diff) == 3 && (maxAngle - minAngle) <= 180))
{//semicircle possibility
if (type == RadialType.Quadrant || type == RadialType.Semicircle)
{
return GetRadiusForSemicircle(q1, q2, finalSize);
}
else
{//full circle
return Math.Min(finalSize.Width / 2, finalSize.Height / 2);
}
}
else
{//full circle
return Math.Min(finalSize.Width / 2, finalSize.Height / 2);
}
}
public static Geometry CreateArcGeometry(double minAngle, double maxAngle, double radius, int thickness, SweepDirection sweepDirection)
{
//the range will have 4 segments (arc, line, arc, line)
//if the sweep angle is bigger than 180 use the large arc
//first use the same sweep direction as the control. invert for the second arc.
PathFigure figure = new PathFigure();
figure.IsClosed = true;
figure.StartPoint = new Point((radius - thickness) * Math.Sin(minAngle * Math.PI / 180),
-(radius - thickness) * Math.Cos(minAngle * Math.PI / 180));
//first arc segment
ArcSegment arc = new ArcSegment();
arc.Point = new Point((radius - thickness) * Math.Sin(maxAngle * Math.PI / 180),
-(radius - thickness) * Math.Cos(maxAngle * Math.PI / 180));
arc.Size = new Size(radius - thickness, radius - thickness);
arc.SweepDirection = sweepDirection;
if (Math.Abs(maxAngle - minAngle) > 180) arc.IsLargeArc = true;
figure.Segments.Add(arc);
//first line segment
LineSegment line = new LineSegment();
line.Point = new Point(radius * Math.Sin(maxAngle * Math.PI / 180),
-radius * Math.Cos(maxAngle * Math.PI / 180));
figure.Segments.Add(line);
//second arc segment
arc = new ArcSegment();
arc.Point = new Point(radius * Math.Sin(minAngle * Math.PI / 180),
-radius * Math.Cos(minAngle * Math.PI / 180));
arc.Size = new Size(radius, radius);
arc.SweepDirection = SweepDirection.Counterclockwise;
if (sweepDirection == SweepDirection.Counterclockwise)
arc.SweepDirection = SweepDirection.Clockwise;
if (Math.Abs(maxAngle - minAngle) > 180) arc.IsLargeArc = true;
figure.Segments.Add(arc);
PathGeometry path = new PathGeometry();
path.Figures.Add(figure);
return path;
}
#region helper methods
private static double GetRadiusForSemicircle(int q1, int q2, Size finalSize)
{
if (q1 == 1 && q2 == 2 || q2 == 1 && q1 == 2)
{
return Math.Min(finalSize.Width/2, finalSize.Height );
}
else if (q1 == 2 && q2 == 3 || q1 == 3 && q2 == 2)
{
return Math.Min(finalSize.Width , finalSize.Height/2);
}
else if (q1 == 3 && q2 == 4 || q2 == 3 && q1 == 4)
{
return Math.Min(finalSize.Width / 2, finalSize.Height);
}
else
{
return Math.Min(finalSize.Width, finalSize.Height / 2);
}
}
private static Point GetCenterForQuadrant(int q, Size finalSize)
{
if (q == 1)
return new Point(0, finalSize.Height);
else if (q == 2)
return new Point(finalSize.Width, finalSize.Height);
else if (q == 3)
return new Point(finalSize.Width, 0);
else
return new Point(0, 0);
}
private static Point GetCenterForSemicircle(int q1, int q2, Size finalSize)
{
if (q1 == 1 && q2 == 2 || q2 == 1 && q1 == 2)
return new Point(finalSize.Width/2, finalSize.Height);
else if (q1 == 2 && q2 == 3 || q1 == 3 && q2 == 2)
return new Point(finalSize.Width, finalSize.Height/2);
else if (q1 == 3 && q2 == 4 || q1 == 4 && q2 == 3)
return new Point(finalSize.Width/2, 0);
else
return new Point(0, finalSize.Height / 2);
}
private static int GetQuadrant(double angle)
{
angle = angle * Math.PI / 180;
if (Math.Sin(angle) >= 0 && Math.Cos(angle) >= 0)
return 1;
else if (Math.Sin(angle) >= 0 && Math.Cos(angle) < 0)
return 2;
else if (Math.Sin(angle) < 0 && Math.Cos(angle) < 0)
return 3;
else
return 4;
}
#endregion
}
}
Submit an article or tip