net.mograsim.logic.ui/src/net/mograsim/logic/ui/model/components/GUIBitDisplay.java

   1 package net.mograsim.logic.ui.model.components;
   2
   3 import net.haspamelodica.swt.helper.gcs.GeneralGC;
   4 import net.haspamelodica.swt.helper.swtobjectwrappers.Font;
   5 import net.haspamelodica.swt.helper.swtobjectwrappers.Point;
   6 import net.haspamelodica.swt.helper.swtobjectwrappers.Rectangle;
   7 import net.mograsim.logic.core.LogicObservable;
   8 import net.mograsim.logic.core.LogicObserver;
   9 import net.mograsim.logic.core.components.BitDisplay;
  10 import net.mograsim.logic.core.types.BitVectorFormatter;
  11 import net.mograsim.logic.ui.model.ViewModel;
  12 import net.mograsim.logic.ui.model.wires.Pin;
  13
  14 public class GUIBitDisplay extends GUIComponent
  15 {
  16         private static final double width = 20;
  17         private static final double height = 15;
  18         private static final double fontHeight = 5;
  19
  20         private final Pin inputPin;
  21
  22         private final LogicObserver logicObs;
  23         private BitDisplay bitDisplay;
  24
  25         public GUIBitDisplay(ViewModel model)
  26         {
  27                 super(model);
  28                 logicObs = (i) -> callComponentLookChangedListeners();
  29
  30                 setSize(width, height);
  31                 addPin(this.inputPin = new Pin(this, 1, 0, height / 2));
  32         }
  33
  34         @Override
  35         public void render(GeneralGC gc, Rectangle visibleRegion)
  36         {
  37                 double posX = getBounds().x;
  38                 double posY = getBounds().y;
  39
  40                 // TODO maybe draw switch state too?
  41                 gc.drawRectangle(posX, posY, width, height);
  42                 String label = bitDisplay == null ? BitVectorFormatter.formatAsString(null)
  43                                 : BitVectorFormatter.formatAsString(bitDisplay.getDisplayedValue());
  44                 Font oldFont = gc.getFont();
  45                 Font labelFont = new Font(oldFont.getName(), fontHeight, oldFont.getStyle());
  46                 gc.setFont(labelFont);
  47                 Point textExtent = gc.textExtent(label);
  48                 gc.drawText(label, posX + (width - textExtent.x) / 2, posY + (height - textExtent.y) / 2, true);
  49                 gc.setFont(oldFont);
  50         }
  51
  52         public void setLogicModelBinding(BitDisplay bitDisplay)
  53         {
  54                 deregisterLogicObs(this.bitDisplay);
  55                 this.bitDisplay = bitDisplay;
  56                 registerLogicObs(bitDisplay);
  57         }
  58
  59         private void registerLogicObs(LogicObservable observable)
  60         {
  61                 if (observable != null)
  62                         observable.registerObserver(logicObs);
  63         }
  64
  65         private void deregisterLogicObs(LogicObservable observable)
  66         {
  67                 if (observable != null)
  68                         observable.deregisterObserver(logicObs);
  69         }
  70
  71         public Pin getInputPin()
  72         {
  73                 return inputPin;
  74         }
  75 }