1 /*
2  * Copyright (c) 2016 Helmut Neemann
3  * Use of this source code is governed by the GPL v3 license
4  * that can be found in the LICENSE file.
5  */
6 package de.neemann.digital.draw.shapes;
7 
8 import de.neemann.digital.core.element.ElementAttributes;
9 import de.neemann.digital.core.element.Keys;
10 import de.neemann.digital.core.element.PinDescriptions;
11 import de.neemann.digital.draw.elements.IOState;
12 import de.neemann.digital.draw.elements.Pin;
13 import de.neemann.digital.draw.elements.Pins;
14 import de.neemann.digital.draw.graphics.*;
15 
16 import static de.neemann.digital.draw.shapes.GenericShape.SIZE;
17 
18 /**
19  * The Demuxer shape
20  */
21 public class DemuxerShape implements Shape {
22     private final int outputCount;
23     private final boolean hasInput;
24     private final boolean flip;
25     private final int height;
26     private final PinDescriptions inputs;
27     private final PinDescriptions outputs;
28     private Pins pins;
29 
30     /**
31      * Creates a new instance
32      *
33      * @param attr    the attributes
34      * @param inputs  the inputs
35      * @param outputs the outputs
36      */
DemuxerShape(ElementAttributes attr, PinDescriptions inputs, PinDescriptions outputs)37     public DemuxerShape(ElementAttributes attr, PinDescriptions inputs, PinDescriptions outputs) {
38         this.inputs = inputs;
39         this.outputs = outputs;
40         this.flip = attr.get(Keys.FLIP_SEL_POSITON);
41         outputCount = 1 << attr.get(Keys.SELECTOR_BITS);
42         hasInput = inputs.size() > 1;
43         height = hasInput || (outputCount <= 2) ? outputCount * SIZE : (outputCount - 1) * SIZE;
44     }
45 
46     @Override
getPins()47     public Pins getPins() {
48         if (pins == null) {
49             pins = new Pins();
50             pins.add(new Pin(new Vector(SIZE, flip ? 0 : height), inputs.get(0)));
51             if (outputCount == 2) {
52                 pins.add(new Pin(new Vector(SIZE * 2, 0 * SIZE), outputs.get(0)));
53                 pins.add(new Pin(new Vector(SIZE * 2, 2 * SIZE), outputs.get(1)));
54             } else
55                 for (int i = 0; i < outputCount; i++) {
56                     pins.add(new Pin(new Vector(SIZE * 2, i * SIZE), outputs.get(i)));
57                 }
58             if (hasInput)
59                 pins.add(new Pin(new Vector(0, (outputCount / 2) * SIZE), inputs.get(1)));
60         }
61         return pins;
62     }
63 
64     @Override
applyStateMonitor(IOState ioState)65     public Interactor applyStateMonitor(IOState ioState) {
66         return null;
67     }
68 
69     @Override
drawTo(Graphic graphic, Style highLight)70     public void drawTo(Graphic graphic, Style highLight) {
71         graphic.drawPolygon(new Polygon(true)
72                 .add(1, 5)
73                 .add(SIZE * 2 - 1, -4)
74                 .add(SIZE * 2 - 1, height + 4)
75                 .add(1, height - 5), Style.NORMAL);
76         graphic.drawText(new Vector(SIZE * 2 - 3, 2), "0", Orientation.RIGHTTOP, Style.SHAPE_PIN);
77     }
78 }
79