Qt设备状态显示

1、QLable法

 void setLED (QLabel* label,int color,int size)
    {
 
        label->setText("");
 
        QString min_width =QString("min-width: %1px;").arg(size);//
        QString min_height =QString("min-height: %1px;").arg(size);//
        QString max_width =QString("max-width: %1px;").arg(size);//
        QString max_height =QString("max-height: %1px;").arg(size);
 
        QString border_radius =QString("border-radius: %1px;").arg(size/2);//
        QString border =QString("border:1px solid black;");//
        QString background ="background-color:";
        switch(color)
        {
        case 0:
            background+="rgb(190,190,190)";
            break;
        case 1:
            background+="rgb(255,0,0)";
            break;
        case 2:
            background+="rgb(0,255,0)";
            break;
        case 3:
            background+="rgb(255,255,0)";
            break;
        default:
            break;
        }
        const QString SheetStyle = min_width + min_height + max_width + max_height + border_radius + border + background;
        label->setStyleSheet(SheetStyle); 
    }