net.mograsim.logic.model.editor/src/net/mograsim/logic/model/editor/handles/WireHandle.java

   1 package net.mograsim.logic.model.editor.handles;
   2
   3 import java.util.Optional;
   4
   5 import org.eclipse.swt.SWT;
   6 import org.eclipse.swt.widgets.Display;
   7
   8 import net.haspamelodica.swt.helper.gcs.GeneralGC;
   9 import net.haspamelodica.swt.helper.swtobjectwrappers.Point;
  10 import net.haspamelodica.swt.helper.swtobjectwrappers.Rectangle;
  11 import net.mograsim.logic.model.editor.states.EditorState;
  12 import net.mograsim.logic.model.model.LogicModelModifiable;
  13 import net.mograsim.logic.model.model.wires.ModelWire;
  14
  15 public class WireHandle extends Handle
  16 {
  17         private boolean selected = false;
  18         private final static double WIDTH = 2.0;
  19         private final static double WIDTH_SQUARED = WIDTH * WIDTH;
  20         private final LogicModelModifiable model;
  21         public final ModelWire parent;
  22
  23         public WireHandle(LogicModelModifiable model, ModelWire parent)
  24         {
  25                 super(5);
  26                 this.model = model;
  27                 this.parent = parent;
  28                 parent.addPathChangedListener(c -> updateBounds());
  29                 updateBounds();
  30         }
  31
  32         @Override
  33         void destroy()
  34         {
  35                 super.destroy();
  36                 parent.removePathChangedListener(c -> updateBounds());
  37         }
  38
  39         public void updateBounds()
  40         {
  41                 Rectangle r = parent.getBounds();
  42                 moveTo(r.x, r.y);
  43                 setSize(r.width, r.height);
  44         }
  45
  46         @Override
  47         public void render(GeneralGC gc)
  48         {
  49                 if (selected)
  50                 {
  51                         gc.setLineWidth(WIDTH);
  52                         gc.setForeground(Display.getDefault().getSystemColor(SWT.COLOR_YELLOW));
  53                         gc.drawPolyline(parent.getEffectivePath());
  54                 }
  55         }
  56
  57         @Override
  58         public void onSelect()
  59         {
  60                 selected = true;
  61                 callRedrawListeners();
  62         }
  63
  64         @Override
  65         public void onDeselect()
  66         {
  67                 selected = false;
  68                 callRedrawListeners();
  69         }
  70
  71         @Override
  72         public void reqDelete()
  73         {
  74                 model.destroyWire(parent);
  75         }
  76
  77         @Override
  78         public boolean contains(double x, double y)
  79         {
  80                 return click(parent, x, y).isPresent();
  81         }
  82
  83         @Override
  84         public boolean click(double x, double y, int stateMask, EditorState state)
  85         {
  86                 Optional<WireClickData> op = click(parent, x, y);
  87                 if (op.isEmpty())
  88                         return false;
  89                 WireClickData data = op.get();
  90                 return state.clickedHandle(new WireHandleClickInfo(this, data.segment, data.pos, stateMask));
  91         }
  92
  93         public static class WireHandleClickInfo extends HandleClickInfo
  94         {
  95                 public final int segment;
  96                 public final Point posOnWire;
  97
  98                 WireHandleClickInfo(WireHandle clicked, int segment, Point posOnWire, int stateMask)
  99                 {
 100                         super(clicked, stateMask);
 101                         this.segment = segment;
 102                         this.posOnWire = posOnWire;
 103                 }
 104
 105         }
 106
 107         private static Optional<WireClickData> click(ModelWire w, double x, double y)
 108         {
 109                 Rectangle modifiedBounds = w.getBounds();
 110                 modifiedBounds.x -= WIDTH;
 111                 modifiedBounds.y -= WIDTH;
 112                 modifiedBounds.width += WIDTH * 2;
 113                 modifiedBounds.height += WIDTH * 2;
 114                 if (modifiedBounds.contains(x, y))
 115                 {
 116                         double[] effectivePath = w.getEffectivePath();
 117                         for (int i = 3; i < effectivePath.length; i += 2)
 118                         {
 119                                 double a1 = effectivePath[i - 3], a2 = effectivePath[i - 2], b1 = effectivePath[i - 1], b2 = effectivePath[i], r1 = b2 - a2,
 120                                                 r2 = a1 - b1;
 121
 122                                 double f = ((x - a1) * r2 + (a2 - y) * r1) / (-r2 * r2 - r1 * r1);
 123                                 if (f >= 0 && f <= 1)
 124                                 {
 125                                         double e1 = a1 + f * (b1 - a1), e2 = a2 + f * (b2 - a2);
 126                                         r1 = e1 - x;
 127                                         r2 = e2 - y;
 128                                         if (r1 * r1 + r2 * r2 <= WIDTH_SQUARED)
 129                                                 return Optional.of(new WireClickData(new Point(e1, e2), (i / 2) - 1));
 130                                 }
 131                         }
 132                 }
 133                 return Optional.empty();
 134         }
 135
 136         private final static class WireClickData
 137         {
 138                 WireClickData(Point pos, int segment)
 139                 {
 140                         this.pos = pos;
 141                         this.segment = segment;
 142                 }
 143
 144                 /**
 145                  * Position on the wire that is closest to the click
 146                  */
 147                 public final Point pos;
 148                 /**
 149                  * Segment of the wire that the {@link Point} pos is on
 150                  */
 151                 public final int segment;
 152         }
 153
 154         @Override
 155         public HandleType getType()
 156         {
 157                 return HandleType.WIRE;
 158         }
 159 }