Posted by Rallaz on Jul 09, 2013; 6:40am
URL: https://forum.librecad.org/setting-layers-tp5708515p5708533.html

Not much more to tell.

void layerDemo::execComm(Document_Interface *doc,
                             QWidget *parent, QString cmd)
{
//to make the compiler happy
    Q_UNUSED(cmd);
    Q_UNUSED(parent);

    QPointF start;
    QPointF end;

//stores current layer
    QString cl = doc->getCurrentLayer();

//create new layer called "bottom" and set current
    doc->setLayer( QString("bottom") );

//create a line in current layer ("bottom")
    start.setX = 0.0;
    start.setY = 0.0;
    end.setX = 10.0;
    end.setY = 0.0;
    doc->addLine(&start, &end);

//another layer, called "left"
    doc->setLayer( QString("left") );

//create a line in current layer ("left")
    end.setX = 0.0;
    end.setY = 10.0;
    doc->addLine(&start, &end);

//restore as current the layer which had before running the plugin
    doc->setLayer( cl );
}