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                 // this wire could already be removed implicitly when removing a selection containing both wires and components
  75                 if (model.getWireByName(parent.name) != null)
  76                         model.destroyWire(parent);
  77         }
  78
  79         @Override
  80         public boolean contains(double x, double y)
  81         {
  82                 return click(parent, x, y).isPresent();
  83         }
  84
  85         @Override
  86         public boolean click(double x, double y, int stateMask, EditorState state)
  87         {
  88                 Optional<WireClickData> op = click(parent, x, y);
  89                 if (op.isEmpty())
  90                         return false;
  91                 WireClickData data = op.get();
  92                 return state.clickedHandle(new WireHandleClickInfo(this, data.segment, data.pos, stateMask));
  93         }
  94
  95         public static class WireHandleClickInfo extends HandleClickInfo
  96         {
  97                 public final int segment;
  98                 public final Point posOnWire;
  99
 100                 WireHandleClickInfo(WireHandle clicked, int segment, Point posOnWire, int stateMask)
 101                 {
 102                         super(clicked, stateMask);
 103                         this.segment = segment;
 104                         this.posOnWire = posOnWire;
 105                 }
 106
 107         }
 108
 109         private static Optional<WireClickData> click(ModelWire w, double x, double y)
 110         {
 111                 Rectangle modifiedBounds = w.getBounds();
 112                 modifiedBounds.x -= WIDTH;
 113                 modifiedBounds.y -= WIDTH;
 114                 modifiedBounds.width += WIDTH * 2;
 115                 modifiedBounds.height += WIDTH * 2;
 116                 if (modifiedBounds.contains(x, y))
 117                 {
 118                         double[] effectivePath = w.getEffectivePath();
 119                         for (int i = 3; i < effectivePath.length; i += 2)
 120                         {
 121                                 double a1 = effectivePath[i - 3], a2 = effectivePath[i - 2], b1 = effectivePath[i - 1], b2 = effectivePath[i], r1 = b2 - a2,
 122                                                 r2 = a1 - b1;
 123
 124                                 double f = ((x - a1) * r2 + (a2 - y) * r1) / (-r2 * r2 - r1 * r1);
 125                                 if (f >= 0 && f <= 1)
 126                                 {
 127                                         double e1 = a1 + f * (b1 - a1), e2 = a2 + f * (b2 - a2);
 128                                         r1 = e1 - x;
 129                                         r2 = e2 - y;
 130                                         if (r1 * r1 + r2 * r2 <= WIDTH_SQUARED)
 131                                                 return Optional.of(new WireClickData(new Point(e1, e2), (i / 2) - 1));
 132                                 }
 133                         }
 134                 }
 135                 return Optional.empty();
 136         }
 137
 138         private final static class WireClickData
 139         {
 140                 WireClickData(Point pos, int segment)
 141                 {
 142                         this.pos = pos;
 143                         this.segment = segment;
 144                 }
 145
 146                 /**
 147                  * Position on the wire that is closest to the click
 148                  */
 149                 public final Point pos;
 150                 /**
 151                  * Segment of the wire that the {@link Point} pos is on
 152                  */
 153                 public final int segment;
 154         }
 155
 156         @Override
 157         public HandleType getType()
 158         {
 159                 return HandleType.WIRE;
 160         }
 161 }