git.gag.com Git - debian/openrocket/blob - core/src/net/sf/openrocket/gui/components/compass/CompassSelector.java

   1 package net.sf.openrocket.gui.components.compass;
   2
   3 import java.awt.event.MouseAdapter;
   4 import java.awt.event.MouseEvent;
   5
   6 import net.sf.openrocket.gui.adaptors.DoubleModel;
   7 import net.sf.openrocket.util.MathUtil;
   8
   9 /**
  10  * Component that allows selecting a compass direction on a CompassSelector.
  11  *
  12  * @author Sampo Niskanen <sampo.niskanen@iki.fi>
  13  */
  14 public class CompassSelector extends CompassPointer {
  15
  16         private final DoubleModel model;
  17
  18         public CompassSelector(DoubleModel model) {
  19                 super(model);
  20                 this.model = model;
  21
  22                 MouseAdapter mouse = new MouseAdapter() {
  23                         private boolean dragging = false;
  24
  25                         @Override
  26                         public void mousePressed(MouseEvent e) {
  27                                 if (!isWithinCircle(e))
  28                                         return;
  29                                 if (e.getButton() != MouseEvent.BUTTON1)
  30                                         return;
  31                                 dragging = true;
  32                                 clicked(e);
  33                         }
  34
  35                         @Override
  36                         public void mouseReleased(MouseEvent e) {
  37                                 if (e.getButton() != MouseEvent.BUTTON1)
  38                                         return;
  39                                 dragging = false;
  40                         }
  41
  42
  43                         @Override
  44                         public void mouseDragged(MouseEvent e) {
  45                                 if (!dragging)
  46                                         return;
  47                                 clicked(e);
  48                         }
  49                 };
  50                 this.addMouseListener(mouse);
  51                 this.addMouseMotionListener(mouse);
  52
  53         }
  54
  55         private boolean isWithinCircle(MouseEvent e) {
  56                 if (mid < 0 || width < 0) {
  57                         return false;
  58                 }
  59
  60                 int x = e.getX() - mid;
  61                 int y = e.getY() - mid;
  62
  63                 double distance = Math.hypot(x, y);
  64                 return distance < width / 2;
  65         }
  66
  67         private void clicked(MouseEvent e) {
  68
  69                 if (mid < 0 || width < 0) {
  70                         return;
  71                 }
  72
  73                 int x = e.getX() - mid;
  74                 int y = e.getY() - mid;
  75
  76                 double distance = Math.hypot(x, y);
  77
  78                 double theta = Math.atan2(y, x);
  79                 theta = MathUtil.reduce360(theta + Math.PI / 2);
  80
  81                 // Round the value appropriately
  82                 theta = Math.toDegrees(theta);
  83
  84                 if (distance > 50) {
  85                         theta = Math.round(theta);
  86                 } else if (distance > 10) {
  87                         theta = 5 * Math.round(theta / 5);
  88                 } else {
  89                         // Do nothing if too close to center
  90                         return;
  91                 }
  92                 theta = Math.toRadians(theta);
  93
  94                 model.setValue(theta);
  95         }
  96
  97 }