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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
  31 /**
  32  * A hexagon shape.
  33  *
  34  * @author Jørgen Austvik - Initial contribution
  35  */
  36 @NonNullByDefault
  37 public class HexagonCorners extends Panel {
  38
  39     private static final int CORNER_DIAMETER = 4;
  40
  41     private final List<PositionDatum> corners;
  42
  43     public HexagonCorners(ShapeType shapeType, List<PositionDatum> corners) {
  44         super(shapeType);
  45
  46         this.corners = Collections.unmodifiableList(new ArrayList<>(corners));
  47     }
  48
  49     @Override
  50     public List<Point2D> generateOutline() {
  51         List<Point2D> result = new ArrayList<>(corners.size());
  52         for (PositionDatum corner : corners) {
  53             result.add(new Point2D(corner.getPosX(), corner.getPosY()));
  54         }
  55
  56         return result;
  57     }
  58
  59     @Override
  60     public void draw(Graphics2D graphics, DrawingSettings settings, PanelState state) {
  61         List<ImagePoint2D> outline = settings.generateImagePoints(generateOutline());
  62         Polygon p = new Polygon();
  63         for (int i = 0; i < outline.size(); i++) {
  64             ImagePoint2D pos = outline.get(i);
  65             p.addPoint(pos.getX(), pos.getY());
  66         }
  67
  68         if (settings.shouldFillWithColor()) {
  69             Color averageColor = getAverageColor(state);
  70             graphics.setColor(averageColor);
  71             graphics.fillPolygon(p);
  72
  73             // Draw color cradient
  74             ImagePoint2D center = findCenter(outline);
  75             for (int i = 0; i < outline.size(); i++) {
  76                 ImagePoint2D corner1Pos = outline.get(i);
  77                 ImagePoint2D corner2Pos = outline.get((i + 1) % outline.size());
  78
  79                 PositionDatum corner1 = corners.get(i);
  80                 PositionDatum corner2 = corners.get((i + 1) % outline.size());
  81
  82                 Color corner1Color = getColor(corner1.getPanelId(), state);
  83                 Color corner2Color = getColor(corner2.getPanelId(), state);
  84                 graphics.setPaint(new BarycentricTriangleGradient(
  85                         new ImagePoint2D(corner1Pos.getX(), corner1Pos.getY()), corner1Color,
  86                         new ImagePoint2D(corner2Pos.getX(), corner2Pos.getY()), corner2Color, center, averageColor));
  87
  88                 Polygon wedge = new Polygon();
  89                 wedge.addPoint(corner1Pos.getX(), corner1Pos.getY());
  90                 wedge.addPoint(corner2Pos.getX(), corner2Pos.getY());
  91                 wedge.addPoint(center.getX(), center.getY());
  92                 graphics.fillPolygon(p);
  93             }
  94         }
  95
  96         if (settings.shouldDrawOutline()) {
  97             graphics.setColor(settings.getOutlineColor());
  98             graphics.drawPolygon(p);
  99         }
 100
 101         if (settings.shouldDrawCorners()) {
 102             for (PositionDatum corner : corners) {
 103                 ImagePoint2D position = settings.generateImagePoint(new Point2D(corner.getPosX(), corner.getPosY()));
 104                 graphics.setColor(getColor(corner.getPanelId(), state));
 105                 graphics.fillOval(position.getX() - CORNER_DIAMETER / 2, position.getY() - CORNER_DIAMETER / 2,
 106                         CORNER_DIAMETER, CORNER_DIAMETER);
 107
 108                 if (settings.shouldDrawOutline()) {
 109                     graphics.setColor(settings.getOutlineColor());
 110                     graphics.drawOval(position.getX() - CORNER_DIAMETER / 2, position.getY() - CORNER_DIAMETER / 2,
 111                             CORNER_DIAMETER, CORNER_DIAMETER);
 112                 }
 113             }
 114         }
 115
 116         if (settings.shouldDrawLabels()) {
 117             graphics.setColor(settings.getLabelColor());
 118
 119             for (PositionDatum corner : corners) {
 120                 ImagePoint2D position = settings.generateImagePoint(new Point2D(corner.getPosX(), corner.getPosY()));
 121                 graphics.drawString(Integer.toString(corner.getPanelId()), position.getX(), position.getY());
 122             }
 123         }
 124     }
 125
 126     private ImagePoint2D findCenter(List<ImagePoint2D> outline) {
 127         Point2D[] bounds = findBounds(outline);
 128         int midX = bounds[0].getX() + (bounds[1].getX() - bounds[0].getX()) / 2;
 129         int midY = bounds[0].getY() + (bounds[1].getY() - bounds[0].getY()) / 2;
 130         return new ImagePoint2D(midX, midY);
 131     }
 132
 133     private static Color getColor(int panelId, PanelState state) {
 134         HSBType color = state.getHSBForPanel(panelId);
 135         return new Color(color.getRGB());
 136     }
 137
 138     private Color getAverageColor(PanelState state) {
 139         float r = 0;
 140         float g = 0;
 141         float b = 0;
 142         for (PositionDatum corner : corners) {
 143             Color c = getColor(corner.getPanelId(), state);
 144             r += c.getRed() * c.getRed();
 145             g += c.getGreen() * c.getGreen();
 146             b += c.getBlue() * c.getBlue();
 147         }
 148
 149         return new Color((int) Math.sqrt((double) r / corners.size()), (int) Math.sqrt((double) g / corners.size()),
 150                 (int) Math.sqrt((double) b / corners.size()));
 151     }
 152 }