using System;
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using HalconDotNet;
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namespace HalconTools
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{
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/// <summary>
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/// This class demonstrates one of the possible implementations for a
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/// (simple) rectangularly shaped ROI. ROIRectangle1 inherits
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/// from the base class ROI and implements (besides other auxiliary
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/// methods) all virtual methods defined in ROI.cs.
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/// Since a simple rectangle is defined by two data points, by the upper
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/// left corner and the lower right corner, we use four values (row1/col1)
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/// and (row2/col2) as class members to hold these positions at
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/// any time of the program. The four corners of the rectangle can be taken
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/// as handles, which the user can use to manipulate the size of the ROI.
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/// Furthermore, we define a midpoint as an additional handle, with which
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/// the user can grab and drag the ROI. Therefore, we declare NumHandles
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/// to be 5 and set the activeHandle to be 0, which will be the upper left
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/// corner of our ROI.
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/// </summary>
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public class ROIRectangle1 : ROI
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{
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private double row1, col1; // upper left
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private double row2, col2; // lower right
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private double midR, midC; // midpoint
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/// <summary>Constructor</summary>
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public ROIRectangle1()
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{
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NumHandles = 5; // 4 corner points + midpoint
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activeHandleIdx = 4;
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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 midX, double midY)
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{
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midR = midY;
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midC = midX;
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row1 = midR - 50;
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col1 = midC - 50;
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row2 = midR + 50;
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col2 = midC + 50;
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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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window.DispRectangle1(row1, col1, row2, col2);
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window.DispRectangle2(row1, col1, 0, 5, 5);
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window.DispRectangle2(row1, col2, 0, 5, 5);
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window.DispRectangle2(row2, col2, 0, 5, 5);
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window.DispRectangle2(row2, col1, 0, 5, 5);
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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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midR = ((row2 - row1) / 2) + row1;
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midC = ((col2 - col1) / 2) + col1;
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val[0] = HMisc.DistancePp(y, x, row1, col1); // upper left
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val[1] = HMisc.DistancePp(y, x, row1, col2); // upper right
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val[2] = HMisc.DistancePp(y, x, row2, col2); // lower right
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val[3] = HMisc.DistancePp(y, x, row2, col1); // lower left
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val[4] = 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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switch (activeHandleIdx)
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{
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case 0:
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window.DispRectangle2(row1, col1, 0, 5, 5);
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break;
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case 1:
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window.DispRectangle2(row1, col2, 0, 5, 5);
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break;
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case 2:
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window.DispRectangle2(row2, col2, 0, 5, 5);
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break;
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case 3:
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window.DispRectangle2(row2, col1, 0, 5, 5);
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break;
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case 4:
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window.DispRectangle2(midR, midC, 0, 5, 5);
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break;
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}
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}
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/// <summary>Gets the HALCON region described by the ROI</summary>
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public override HRegion getRegion()
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{
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HRegion region = new HRegion();
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region.GenRectangle1(row1, col1, row2, col2);
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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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return new HTuple(new double[] { row1, col1, row2, col2 });
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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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double len1, len2;
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double tmp;
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switch (activeHandleIdx)
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{
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case 0: // upper left
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row1 = newY;
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col1 = newX;
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break;
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case 1: // upper right
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row1 = newY;
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col2 = newX;
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break;
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case 2: // lower right
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row2 = newY;
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col2 = newX;
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break;
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case 3: // lower left
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row2 = newY;
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col1 = newX;
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break;
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case 4: // midpoint
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len1 = ((row2 - row1) / 2);
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len2 = ((col2 - col1) / 2);
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row1 = newY - len1;
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row2 = newY + len1;
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col1 = newX - len2;
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col2 = newX + len2;
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break;
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}
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if (row2 <= row1)
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{
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tmp = row1;
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row1 = row2;
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row2 = tmp;
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}
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if (col2 <= col1)
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{
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tmp = col1;
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col1 = col2;
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col2 = tmp;
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}
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midR = ((row2 - row1) / 2) + row1;
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midC = ((col2 - col1) / 2) + col1;
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}//end of method
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}//end of class
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}//end of namespace
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