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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.nanoleaf.internal.layout.shape;
  14
  15 import java.awt.Color;
  16 import java.awt.Graphics2D;
  17 import java.awt.Polygon;
  18 import java.util.ArrayList;
  19 import java.util.Collections;
  20 import java.util.List;
  21
  22 import org.eclipse.jdt.annotation.NonNullByDefault;
  23 import org.openhab.binding.nanoleaf.internal.layout.DrawingSettings;
  24 import org.openhab.binding.nanoleaf.internal.layout.ImagePoint2D;
  25 import org.openhab.binding.nanoleaf.internal.layout.PanelState;
  26 import org.openhab.binding.nanoleaf.internal.layout.Point2D;
  27 import org.openhab.binding.nanoleaf.internal.layout.ShapeType;
  28 import org.openhab.binding.nanoleaf.internal.model.PositionDatum;
  29 import org.openhab.core.library.types.HSBType;
  30 import org.openhab.core.util.ColorUtil;
  31
  32 /**
  33  * A hexagon shape.
  34  *
  35  * @author Jørgen Austvik - Initial contribution
  36  */
  37 @NonNullByDefault
  38 public class HexagonCorners extends Panel {
  39
  40     private static final int CORNER_DIAMETER = 4;
  41
  42     private final List<PositionDatum> corners;
  43
  44     public HexagonCorners(ShapeType shapeType, List<PositionDatum> corners) {
  45         super(shapeType);
  46
  47         this.corners = Collections.unmodifiableList(new ArrayList<>(corners));
  48     }
  49
  50     @Override
  51     public List<Point2D> generateOutline() {
  52         List<Point2D> result = new ArrayList<>(corners.size());
  53         for (PositionDatum corner : corners) {
  54             result.add(new Point2D(corner.getPosX(), corner.getPosY()));
  55         }
  56
  57         return result;
  58     }
  59
  60     @Override
  61     public void draw(Graphics2D graphics, DrawingSettings settings, PanelState state) {
  62         List<ImagePoint2D> outline = settings.generateImagePoints(generateOutline());
  63         Polygon p = new Polygon();
  64         for (int i = 0; i < outline.size(); i++) {
  65             ImagePoint2D pos = outline.get(i);
  66             p.addPoint(pos.getX(), pos.getY());
  67         }
  68
  69         if (settings.shouldFillWithColor()) {
  70             Color averageColor = getAverageColor(state);
  71             graphics.setColor(averageColor);
  72             graphics.fillPolygon(p);
  73
  74             // Draw color cradient
  75             ImagePoint2D center = findCenter(outline);
  76             for (int i = 0; i < outline.size(); i++) {
  77                 ImagePoint2D corner1Pos = outline.get(i);
  78                 ImagePoint2D corner2Pos = outline.get((i + 1) % outline.size());
  79
  80                 PositionDatum corner1 = corners.get(i);
  81                 PositionDatum corner2 = corners.get((i + 1) % outline.size());
  82
  83                 Color corner1Color = getColor(corner1.getPanelId(), state);
  84                 Color corner2Color = getColor(corner2.getPanelId(), state);
  85                 graphics.setPaint(new BarycentricTriangleGradient(
  86                         new ImagePoint2D(corner1Pos.getX(), corner1Pos.getY()), corner1Color,
  87                         new ImagePoint2D(corner2Pos.getX(), corner2Pos.getY()), corner2Color, center, averageColor));
  88
  89                 Polygon wedge = new Polygon();
  90                 wedge.addPoint(corner1Pos.getX(), corner1Pos.getY());
  91                 wedge.addPoint(corner2Pos.getX(), corner2Pos.getY());
  92                 wedge.addPoint(center.getX(), center.getY());
  93                 graphics.fillPolygon(p);
  94             }
  95         }
  96
  97         if (settings.shouldDrawOutline()) {
  98             graphics.setColor(settings.getOutlineColor());
  99             graphics.drawPolygon(p);
 100         }
 101
 102         if (settings.shouldDrawCorners()) {
 103             for (PositionDatum corner : corners) {
 104                 ImagePoint2D position = settings.generateImagePoint(new Point2D(corner.getPosX(), corner.getPosY()));
 105                 graphics.setColor(getColor(corner.getPanelId(), state));
 106                 graphics.fillOval(position.getX() - CORNER_DIAMETER / 2, position.getY() - CORNER_DIAMETER / 2,
 107                         CORNER_DIAMETER, CORNER_DIAMETER);
 108
 109                 if (settings.shouldDrawOutline()) {
 110                     graphics.setColor(settings.getOutlineColor());
 111                     graphics.drawOval(position.getX() - CORNER_DIAMETER / 2, position.getY() - CORNER_DIAMETER / 2,
 112                             CORNER_DIAMETER, CORNER_DIAMETER);
 113                 }
 114             }
 115         }
 116
 117         if (settings.shouldDrawLabels()) {
 118             graphics.setColor(settings.getLabelColor());
 119
 120             for (PositionDatum corner : corners) {
 121                 ImagePoint2D position = settings.generateImagePoint(new Point2D(corner.getPosX(), corner.getPosY()));
 122                 graphics.drawString(Integer.toString(corner.getPanelId()), position.getX(), position.getY());
 123             }
 124         }
 125     }
 126
 127     private ImagePoint2D findCenter(List<ImagePoint2D> outline) {
 128         Point2D[] bounds = findBounds(outline);
 129         int midX = bounds[0].getX() + (bounds[1].getX() - bounds[0].getX()) / 2;
 130         int midY = bounds[0].getY() + (bounds[1].getY() - bounds[0].getY()) / 2;
 131         return new ImagePoint2D(midX, midY);
 132     }
 133
 134     private static Color getColor(int panelId, PanelState state) {
 135         HSBType color = state.getHSBForPanel(panelId);
 136         return new Color(ColorUtil.hsbTosRgb(color));
 137     }
 138
 139     private Color getAverageColor(PanelState state) {
 140         float r = 0;
 141         float g = 0;
 142         float b = 0;
 143         for (PositionDatum corner : corners) {
 144             Color c = getColor(corner.getPanelId(), state);
 145             r += c.getRed() * c.getRed();
 146             g += c.getGreen() * c.getGreen();
 147             b += c.getBlue() * c.getBlue();
 148         }
 149
 150         return new Color((int) Math.sqrt((double) r / corners.size()), (int) Math.sqrt((double) g / corners.size()),
 151                 (int) Math.sqrt((double) b / corners.size()));
 152     }
 153 }