tmf/org.lttng.scope.tmf2.views.ui/src/org/lttng/scope/tmf2/views/ui/timeline/widgets/timegraph/VerticalPosition.java

   1 /*
   2  * Copyright (C) 2017 EfficiOS Inc., Alexandre Montplaisir <alexmonthy@efficios.com>
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  */
   9
  10 package org.lttng.scope.tmf2.views.ui.timeline.widgets.timegraph;
  11
  12 import java.util.Objects;
  13
  14 import org.eclipse.jdt.annotation.Nullable;
  15
  16 import com.google.common.base.MoreObjects;
  17
  18 public class VerticalPosition {
  19
  20     /**
  21      * Placeholder for uninitialized vertical positions.
  22      */
  23     public static final VerticalPosition UNINITIALIZED_VP = new VerticalPosition(0.0, 0.0);
  24
  25     private static final double EPSILON = 0.00001;
  26
  27     public final double fTopPos;
  28     public final double fBottomPos;
  29
  30     public VerticalPosition(double topPos, double bottomPos) {
  31         fTopPos = topPos;
  32         fBottomPos = bottomPos;
  33     }
  34
  35     @Override
  36     public int hashCode() {
  37         return Objects.hash(fTopPos, fBottomPos);
  38     }
  39
  40     @Override
  41     public boolean equals(@Nullable Object obj) {
  42         if (this == obj) {
  43             return true;
  44         }
  45         if (obj == null) {
  46             return false;
  47         }
  48         if (getClass() != obj.getClass()) {
  49             return false;
  50         }
  51         VerticalPosition other = (VerticalPosition) obj;
  52         return (doubleEquals(fTopPos, other.fTopPos)
  53                 && doubleEquals(fBottomPos, other.fBottomPos));
  54     }
  55
  56     @Override
  57     public String toString() {
  58         return MoreObjects.toStringHelper(this)
  59                 .add("fTopPos", fTopPos) //$NON-NLS-1$
  60                 .add("fBottomPos", fBottomPos) //$NON-NLS-1$
  61                 .toString();
  62     }
  63
  64     private static boolean doubleEquals(double d1, double d2) {
  65         return (Math.abs(d1 - d2) < EPSILON);
  66     }
  67 }