Init

graphicscrossitem.cpp

@@ -0,0 +1,73 @@
+#include "graphicscrossitem.h"
+
+graphicsCrossItem::graphicsCrossItem(qreal px, qreal py)
+{
+    x = px;
+    y = py;
+    dim=3;
+    col = QColor(Qt::lightGray);
+    scIndex=1;
+
+}
+
+QRectF graphicsCrossItem::boundingRect() const
+{
+    qreal d = dim*scIndex;
+
+    return QRectF(x-d, y-d, 2*d, 2*d);
+}
+
+
+void graphicsCrossItem::setColor(QColor c)
+{
+    if (col!=c) {
+        prepareGeometryChange();
+        col = c;
+    }
+}
+
+void graphicsCrossItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    qreal d = dim*scIndex;
+    painter->setPen(QPen(col));
+    QPointF p1(x-d, y-d);
+    QPointF p2(x+d, y+d);
+    QPointF p3(x-d, y+d);
+    QPointF p4(x+d, y-d);
+
+    painter->drawLine(p1, p2);
+    painter->drawLine(p3, p4);
+
+}
+
+void graphicsCrossItem::setPos(QPointF p)
+{
+    qreal px, py;
+    px= p.x(); py= p.y();
+
+    if ((x!=px)||(y!=py) )  {
+        prepareGeometryChange();
+        x=px; y=py;
+    }
+}
+
+void graphicsCrossItem::setPosPolar(qreal d, qreal a)
+{
+    if (d>0)
+    {
+        setPos(cos((90-a)/180*M_PI)*d, -sin((90-a)/180*M_PI)*d);
+    }
+    else
+    {
+        setPos(0,0);
+    }
+}
+
+void graphicsCrossItem::setScaleIndex(qreal s)
+{
+    if (scIndex!=s){
+        prepareGeometryChange();
+        scIndex=s;
+    }
+
+}