using HalconDotNet;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace Bro.UI.hdisplay.ViewROI
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{
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public class ROIPolygon : ROI
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{
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private List<double> rows;
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private List<double> cols;
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private double midR, midC; // midpoint
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HRegion region;
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private static ROIPolygon instance;
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protected override int NumHandles { get => rows.Count + 1; }
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public static ROIPolygon GetCurrentInstance()
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{
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if (instance == null)
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instance = new ROIPolygon();
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return instance;
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}
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private ROIPolygon()
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{
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midR = 0;
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midC = 0;
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rows = new List<double>();
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cols = new List<double>();
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}
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/// <summary>Creates a new ROI instance at the mouse position</summary>
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/// <param name="midX">
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/// x (=column) coordinate for interactive ROI
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/// </param>
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/// <param name="midY">
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/// y (=row) coordinate for interactive ROI
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/// </param>
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public override void createROI(double x, double y)
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{
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region = new HRegion();
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rows.Add(y);
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cols.Add(x);
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}
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public void CreateROIEnd()
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{
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HOperatorSet.GenRegionPolygon(out HObject hObject, new HTuple(rows.ToArray()), new HTuple(cols.ToArray()));
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HOperatorSet.AreaCenter(hObject, out HTuple area, out HTuple row, out HTuple col);
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midR = row;
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midC = col;
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}
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public void DisposeCurrentInstance()
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{
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instance = null;
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}
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/// <summary>Paints the ROI into the supplied window</summary>
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/// <param name="window">HALCON window</param>
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public override void draw(HalconDotNet.HWindow window)
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{
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if (rows.Count > 1)
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{
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region.GenRegionPolygonFilled(new HTuple(rows.ToArray()), new HTuple(cols.ToArray()));
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window.DispRegion(region);
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}
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for (int i = 0; i < rows.Count; i++)
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{
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window.DispRectangle2(rows[i], cols[i], 0, 5, 5);
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}
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if (midR != 0 || midC != 0)
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window.DispRectangle2(midR, midC, 0, 5, 5);
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}
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/// <summary>
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/// Returns the distance of the ROI handle being
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/// closest to the image point(x,y)
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/// </summary>
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/// <param name="x">x (=column) coordinate</param>
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/// <param name="y">y (=row) coordinate</param>
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/// <returns>
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/// Distance of the closest ROI handle.
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/// </returns>
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public override double distToClosestHandle(double x, double y)
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{
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double max = 10000;
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double[] val = new double[NumHandles];
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for (int i = 0; i < rows.Count; i++)
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{
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val[i] = HMisc.DistancePp(y, x, rows[i], cols[i]);
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}
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val[NumHandles - 1] = HMisc.DistancePp(y, x, midR, midC); // midpoint
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for (int i = 0; i < NumHandles; i++)
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{
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if (val[i] < max)
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{
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max = val[i];
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activeHandleIdx = i;
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}
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}// end of for
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return val[activeHandleIdx];
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}
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/// <summary>
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/// Paints the active handle of the ROI object into the supplied window
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/// </summary>
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/// <param name="window">HALCON window</param>
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public override void displayActive(HalconDotNet.HWindow window)
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{
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if (activeHandleIdx == rows.Count)
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window.DispRectangle2(midR, midC, 0, 5, 5);
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else
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window.DispRectangle2(rows[activeHandleIdx], cols[activeHandleIdx], 0, 5, 5);
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}
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/// <summary>
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/// Gets the HALCON region described by the ROI
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/// </summary>
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public override HRegion getRegion()
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{
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region.GenRegionPolygonFilled(new HTuple(rows.ToArray()), new HTuple(cols.ToArray()));
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return region;
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}
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/// <summary>
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/// Gets the model information described by
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/// the interactive ROI
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/// </summary>
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public override HTuple getModelData()
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{
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HTuple val = new HTuple();
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val.Append(new HTuple(rows.ToArray()));
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val.Append(new HTuple(cols.ToArray()));
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return val;
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}
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/// <summary>
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/// Recalculates the shape of the ROI instance. Translation is
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/// performed at the active handle of the ROI object
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/// for the image coordinate (x,y)
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/// </summary>
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/// <param name="newX">x mouse coordinate</param>
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/// <param name="newY">y mouse coordinate</param>
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public override void moveByHandle(double newX, double newY)
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{
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var deltaRow = new List<double>();
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var deltaCol = new List<double>();
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for (int i = 0; i < rows.Count; i++)
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{
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deltaRow.Add(rows[i] - midR);
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deltaCol.Add(cols[i] - midC);
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}
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if (activeHandleIdx == rows.Count)
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{
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midR = newY;
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midC = newX;
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for (int i = 0; i < rows.Count; i++)
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{
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rows[i] = midR + deltaRow[i];
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cols[i] = midC + deltaCol[i];
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}
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}
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else
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{
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rows[activeHandleIdx] = newY;
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cols[activeHandleIdx] = newX;
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}
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}//end of method
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}
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}
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