From 92f16ec85e97b9c28147677f39951ebd4e8e8aa3 Mon Sep 17 00:00:00 2001
From: Lorenz Gerber <lorenz.gerber@lablicate.com>
Date: Thu, 21 Nov 2024 16:07:18 +0800
Subject: [PATCH] PCA reinstate basic dbl click selection score plot

Signed-off-by: Lorenz Gerber <lorenz.gerber@lablicate.com>
---
 .../pca/ui/swt/ExtendedScorePlot2D.java       | 72 +++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/chemclipse/plugins/org.eclipse.chemclipse.xxd.process.supplier.pca.ui/src/org/eclipse/chemclipse/xxd/process/supplier/pca/ui/swt/ExtendedScorePlot2D.java b/chemclipse/plugins/org.eclipse.chemclipse.xxd.process.supplier.pca.ui/src/org/eclipse/chemclipse/xxd/process/supplier/pca/ui/swt/ExtendedScorePlot2D.java
index 2e0c1dd99a..f60e416f35 100644
--- a/chemclipse/plugins/org.eclipse.chemclipse.xxd.process.supplier.pca.ui/src/org/eclipse/chemclipse/xxd/process/supplier/pca/ui/swt/ExtendedScorePlot2D.java
+++ b/chemclipse/plugins/org.eclipse.chemclipse.xxd.process.supplier.pca.ui/src/org/eclipse/chemclipse/xxd/process/supplier/pca/ui/swt/ExtendedScorePlot2D.java
@@ -14,6 +14,8 @@
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
+import java.util.Comparator;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicReference;
 
@@ -34,6 +36,7 @@
 import org.eclipse.chemclipse.xxd.process.supplier.pca.model.IAnalysisSettings;
 import org.eclipse.chemclipse.xxd.process.supplier.pca.model.IResultPCA;
 import org.eclipse.chemclipse.xxd.process.supplier.pca.model.IResultsPCA;
+import org.eclipse.chemclipse.xxd.process.supplier.pca.model.ResultDelta;
 import org.eclipse.chemclipse.xxd.process.supplier.pca.ui.Activator;
 import org.eclipse.chemclipse.xxd.process.supplier.pca.ui.chart2d.ScorePlot;
 import org.eclipse.chemclipse.xxd.process.supplier.pca.ui.help.HelpContext;
@@ -297,6 +300,75 @@ public void handleEvent(BaseChart baseChart, Event event) {
 				}
 			}
 		});
+		chartSettings.addHandledEventProcessor(new IHandledEventProcessor() {
+
+			@Override
+			public int getEvent() {
+
+				return IMouseSupport.EVENT_MOUSE_DOUBLE_CLICK;
+			}
+
+			@Override
+			public int getButton() {
+
+				return IMouseSupport.MOUSE_BUTTON_LEFT;
+			}
+
+			@Override
+			public int getStateMask() {
+
+				return SWT.NONE;
+			}
+
+			@Override
+			public void handleEvent(BaseChart baseChart, Event event) {
+
+				if(evaluationPCA != null) {
+					/*
+					 * Determine the x|y coordinates.
+					 */
+					Rectangle rectangle = baseChart.getPlotArea().getBounds();
+					int x = event.x;
+					int y = event.y;
+					int width = rectangle.width;
+					int height = rectangle.height;
+					/*
+					 * Calculate the selected point.
+					 */
+					Range rangeX = baseChart.getAxisSet().getXAxis(BaseChart.ID_PRIMARY_X_AXIS).getRange();
+					Range rangeY = baseChart.getAxisSet().getYAxis(BaseChart.ID_PRIMARY_Y_AXIS).getRange();
+					double pX = rangeX.lower + (rangeX.upper - rangeX.lower) * ((1.0d / width) * x);
+					double pY = rangeY.lower + (rangeY.upper - rangeY.lower) * ((1.0d / height) * y);
+					/*
+					 * Map the result deltas.
+					 */
+					PrincipalComponentUI principalComponentUI = principalComponentControl.get();
+					int pcX = principalComponentUI.getPCX();
+					int pcY = principalComponentUI.getPCY();
+					IResultsPCA<? extends IResultPCA, ? extends IVariable> resultsPCA = evaluationPCA.getResults();
+					List<? extends IResultPCA> resultList = resultsPCA.getPcaResultList();
+					List<ResultDelta> resultDeltas = new ArrayList<>();
+					//
+					for(int i = 0; i < resultList.size(); i++) {
+						IResultPCA pcaResult = resultList.get(i);
+						IPoint pointResult = getPoint(pcaResult, pcX, pcY, i);
+						double deltaX = Math.abs(pointResult.getX() - pX);
+						double deltaY = Math.abs(pointResult.getY() - pY);
+						resultDeltas.add(new ResultDelta(pcaResult, deltaX, deltaY));
+					}
+					/*
+					 * Get the closest result.
+					 */
+					if(!resultDeltas.isEmpty()) {
+						Collections.sort(resultDeltas, Comparator.comparing(ResultDelta::getDeltaX).thenComparing(ResultDelta::getDeltaY));
+						ResultDelta resultDelta = resultDeltas.get(0);
+						List<ISample> highlightedSamples = new ArrayList<>();
+						highlightedSamples.add(resultDelta.getResultPCA().getSample());
+						UpdateNotifierUI.update(event.display, IChemClipseEvents.TOPIC_PCA_UPDATE_HIGHLIGHT_SAMPLE, highlightedSamples.toArray());
+					}
+				}
+			}
+		});
 		scorePlot.applySettings(chartSettings);
 		/*
 		 * Paint Listener