demos/chip/chip.cpp

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  41
  42 #include "chip.h"
  43
  44 #include <QtGui>
  45
  46 Chip::Chip(const QColor &color, int x, int y)
  47 {
  48     this->x = x;
  49     this->y = y;
  50     this->color = color;
  51     setZValue((x + y) % 2);
  52
  53     setFlags(ItemIsSelectable | ItemIsMovable);
  54     setAcceptsHoverEvents(true);
  55 }
  56
  57 QRectF Chip::boundingRect() const
  58 {
  59     return QRectF(0, 0, 110, 70);
  60 }
  61
  62 QPainterPath Chip::shape() const
  63 {
  64     QPainterPath path;
  65     path.addRect(14, 14, 82, 42);
  66     return path;
  67 }
  68
  69 void Chip::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
  70 {
  71     Q_UNUSED(widget);
  72
  73     QColor fillColor = (option->state & QStyle::State_Selected) ? color.dark(150) : color;
  74     if (option->state & QStyle::State_MouseOver)
  75         fillColor = fillColor.light(125);
  76
  77     const qreal lod = option->levelOfDetailFromTransform(painter->worldTransform());
  78     if (lod < 0.2) {
  79         if (lod < 0.125) {
  80             painter->fillRect(QRectF(0, 0, 110, 70), fillColor);
  81             return;
  82         }
  83
  84         QBrush b = painter->brush();
  85         painter->setBrush(fillColor);
  86         painter->drawRect(13, 13, 97, 57);
  87         painter->setBrush(b);
  88         return;
  89     }
  90
  91     QPen oldPen = painter->pen();
  92     QPen pen = oldPen;
  93     int width = 0;
  94     if (option->state & QStyle::State_Selected)
  95         width += 2;
  96
  97     pen.setWidth(width);
  98     QBrush b = painter->brush();
  99     painter->setBrush(QBrush(fillColor.dark(option->state & QStyle::State_Sunken ? 120 : 100)));
 100
 101     painter->drawRect(QRect(14, 14, 79, 39));
 102     painter->setBrush(b);
 103
 104     if (lod >= 1) {
 105         painter->setPen(QPen(Qt::gray, 1));
 106         painter->drawLine(15, 54, 94, 54);
 107         painter->drawLine(94, 53, 94, 15);
 108         painter->setPen(QPen(Qt::black, 0));
 109     }
 110
 111     // Draw text
 112     if (lod >= 2) {
 113         QFont font("Times", 10);
 114         font.setStyleStrategy(QFont::ForceOutline);
 115         painter->setFont(font);
 116         painter->save();
 117         painter->scale(0.1, 0.1);
 118         painter->drawText(170, 180, QString("Model: VSC-2000 (Very Small Chip) at %1x%2").arg(x).arg(y));
 119         painter->drawText(170, 200, QString("Serial number: DLWR-WEER-123L-ZZ33-SDSJ"));
 120         painter->drawText(170, 220, QString("Manufacturer: Chip Manufacturer"));
 121         painter->restore();
 122     }
 123
 124     // Draw lines
 125     QVarLengthArray<QLineF, 36> lines;
 126     if (lod >= 0.5) {
 127         for (int i = 0; i <= 10; i += (lod > 0.5 ? 1 : 2)) {
 128             lines.append(QLineF(18 + 7 * i, 13, 18 + 7 * i, 5));
 129             lines.append(QLineF(18 + 7 * i, 54, 18 + 7 * i, 62));
 130         }
 131         for (int i = 0; i <= 6; i += (lod > 0.5 ? 1 : 2)) {
 132             lines.append(QLineF(5, 18 + i * 5, 13, 18 + i * 5));
 133             lines.append(QLineF(94, 18 + i * 5, 102, 18 + i * 5));
 134         }
 135     }
 136     if (lod >= 0.4) {
 137         const QLineF lineData[] = {
 138             QLineF(25, 35, 35, 35),
 139             QLineF(35, 30, 35, 40),
 140             QLineF(35, 30, 45, 35),
 141             QLineF(35, 40, 45, 35),
 142             QLineF(45, 30, 45, 40),
 143             QLineF(45, 35, 55, 35)
 144         };
 145         lines.append(lineData, 6);
 146     }
 147     painter->drawLines(lines.data(), lines.size());
 148
 149     // Draw red ink
 150     if (stuff.size() > 1) {
 151         QPen p = painter->pen();
 152         painter->setPen(QPen(Qt::red, 1, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
 153         painter->setBrush(Qt::NoBrush);
 154         QPainterPath path;
 155         path.moveTo(stuff.first());
 156         for (int i = 1; i < stuff.size(); ++i)
 157             path.lineTo(stuff.at(i));
 158         painter->drawPath(path);
 159         painter->setPen(p);
 160     }
 161 }
 162
 163 void Chip::mousePressEvent(QGraphicsSceneMouseEvent *event)
 164 {
 165     QGraphicsItem::mousePressEvent(event);
 166     update();
 167 }
 168
 169 void Chip::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 170 {
 171     if (event->modifiers() & Qt::ShiftModifier) {
 172         stuff << event->pos();
 173         update();
 174         return;
 175     }
 176     QGraphicsItem::mouseMoveEvent(event);
 177 }
 178
 179 void Chip::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 180 {
 181     QGraphicsItem::mouseReleaseEvent(event);
 182     update();
 183 }