Emiliano Torres's questions

I have a rest api in java 8 with spring-boot and my service returns a json where it shows me my Double value with the letter E inside it (scientific notation). My value in the DB is stored without the letter E. When I retrieve it, it is already stored in my Double property with the letter E. How can I make the API response without the E in the value of the double???. I show you my answer class.

public class Empresa {
    private String nombre;
    private Double monto;
    // getters y setters aca

}

and the response I see is:

{
    "Empresa": {
        "nombre": "Empresa1",
        "monto": 4.23423443E8
    }
}

I am with a project in Angular 7. I have several forms and in the fields that are only digits and/or amounts I use this onlyDigits directive ( https://github.com/changhuixu/ngx-digit-only ) and it works very well. As the documentation says when I have an .html that belongs to a module, I use it this way:

In the .module.ts I declare this way:

import { DigitOnlyModule } from '@uiowa/digit-only';

@NgModule({
  declarations: [
    ...
  ],
  imports: [
    BrowserModule,
    DigitOnlyModule
  ],
  ...
})

And in the html form that I need to use it, I do it this way:

<input type="text" digitOnly />

Nothing special and just as the documentation says. The PROBLEM is that I have a couple of forms (modals) that are generic and are not defined as modules so digitOnly doesn't work (it doesn't throw an error or anything... it just doesn't work). This is an example of one of them and where I use digitOnly but it doesn't work for me:

<form class="form" role="form" [formGroup]="form">
<fieldset>
    <div class="modal-header">
        <span>{{ modalHeader }}</span>
    </div>

    <div class="modal-body">
        <div class=" form-group row">
            <label class="col-sm-3 col-form-label">Nim a portar</label>
            <div class="col-sm-8">
                <div class="form-group row">
                    <div class="col-sm-4">
                        <input type="text" digitOnly maxlength="4" class="form-control" placeholder="Prefijo (sin 0)" [formControl]="form.controls['pref']" [ngClass]="{'form-control-danger': form.controls['pref'].hasError('required') && form.controls['pref'].touched}">
                    </div>
                    <div class="col-sm-8">
                        <input type="text" digitOnly maxlength="10" class="form-control" placeholder="Número (sin 15)" [formControl]="form.controls['nim']" [ngClass]="{'form-control-danger': form.controls['nim'].hasError('required') && form.controls['nim'].touched}">
                    </div>
                </div>
                <div style="color:red" class="m-1 form-control-feedback" *ngIf="form.controls['pref'].hasError('required') && form.controls['pref'].touched">¡El código de área del Nim a portar es requerido!</div>
                <div style="color:red" class="m-1 form-control-feedback" *ngIf="form.controls['pref'].hasError('minlength') && form.controls['pref'].touched">¡El código de área del Nim a portar debe contener al menos 2 dígitos!</div>
                <div style="color:red" class="m-1 form-control-feedback" *ngIf="form.controls['pref'].hasError('pattern') && form.controls['pref'].touched">¡El código de área del Nim a portar no tiene el formato correcto!</div>
                <div style="color:red" class="m-1 form-control-feedback" *ngIf="form.controls['nim'].hasError('required') && form.controls['nim'].touched">¡El número del Nim a portar es requerido!</div>
                <div style="color:red" class="m-1 form-control-feedback" *ngIf="form.controls['nim'].hasError('pattern') && form.controls['nim'].touched">¡El número del Nim a portar no tiene el formato correcto!</div>
                <div style="color:red" class="m-1 form-control-feedback" *ngIf="form.hasError('phoneLength')">¡El número del Nim a portar (Cód área + número) no tiene la longitud correcta!</div>
            </div>
            <button class="col-sm-1 btn btn-edit-claro btn-copy" (click)="copyText(formNim.value.area + formNim.value.num)"><i class="far fa-copy" aria-hidden="true"></i></button>
        </div>
        <div class=" form-group row">
            <label class="col-sm-3 col-form-label">Empresa orig.</label>
            <div class="col-sm-9">
                <select class="form-control" [formControl]="form.controls['operator']">
                    <option [value]="null" hidden>Seleccione la empresa de origen </option>
                    <option [value]="i.id" *ngFor="let i of modalOperators">{{i.name}}</option>
                </select>
            </div>
        </div>
        <div class="form-group row">
            <label for="market" class="col-sm-3 col-form-label">Mercado orig.</label>
            <div class="col-sm-9">
                <select class="form-control" [formControl]="form.controls['market']">
                    <option [value]="null" hidden>Seleccione el mercado origen</option>
                    <option [value]="i.id" *ngFor="let i of modalMarkets">{{i.name}}</option>
                </select>
            </div>
        </div>
        <div class="form-group row with-space left-panel-form">
            <div class="col-sm-12 title-form">
                <span>Gestión plan nuevo</span>
            </div>
            <div class="col-sm-12">
                <hr>
            </div>
        </div>
        <div class="form-group row">
            <label class="col-sm-3 col-form-label">Mercado dest.</label>
            <div class="col-sm-9">
                <select class="form-control" [formControl]="form.controls['markettarget']"
                    (change)="changeMarketTarget($event.target.value)">
                    <option [value]="null" hidden>Seleccione el mercado destino </option>
                    <option [value]="i.id" *ngFor="let i of modalMarkets">{{i.name}}
                    </option>
                </select>
            </div>
        </div>
        <div class="form-group row">
            <label for="payment" class="col-sm-3 col-form-label">Abono elegido</label>
            <div class="col-sm-9">
                <select class="form-control" [formControl]="form.controls['payment']">
                    <option [value]="null" hidden>Seleccione el abono del plan </option>
                    <option [value]="i.id" *ngFor="let i of payments">{{i.description}}
                    </option>
                </select>
            </div>
        </div>
    </div>
    <div class="modal-footer">
        <button type="button" class="btn btn-md btn-outline-claro" (click)="closeModal()">Cerrar</button>
        <button type="button" [disabled]="!form.valid" class="btn btn-claro" (click)="onSaveContinue()">Agregar y
            Limpiar</button>
        <button type="button" [disabled]="!form.valid" class="btn btn-claro" (click)="onSaveClose()">Agregar y
            Cerrar</button>
    </div>
</fieldset>

and the .component.ts of said form:

import { Component, OnInit, Output, EventEmitter } from '@angular/core';
import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';
import { FormBuilder, FormGroup, Validators, FormControl } from '@angular/forms';

import { ErrorMessageService } from '../error-message/error-message.service';
import { AditionalNimVo } from '../../services/vos/AditionalNimVo';
import { WSRESTCatalog } from '../../services/catalog.service';

@Component({
selector: 'ngx-aditionalnim',
templateUrl: './aditional-nim.component.html',
styleUrls: ['../../app.component.scss'],
})
    export class AditionalNimComponent implements OnInit {
    @Output() passEntry: EventEmitter<any> = new EventEmitter();

form: FormGroup;
modalHeader: string;
modalOperation: number;
modalObject: any;
modalOperators;
modalMarkets;
payments;

constructor(private activeModal: NgbActiveModal,
            private fb: FormBuilder,
            private catalogService: WSRESTCatalog,
            private errorService: ErrorMessageService,
    ) { }

ngOnInit() {
    this.form = this.fb.group({
        pref: new FormControl(null, Validators.compose([Validators.required, Validators.minLength(2),
            Validators.pattern('^[1-9][0-9]*$')])),
        nim: new FormControl(null, Validators.compose([Validators.required, Validators.pattern('^[1-9][0-9]*$')])),
        operator: new FormControl(null, Validators.compose([Validators.required])),
        market: new FormControl(null, Validators.compose([Validators.required])),
        markettarget: new FormControl(null, Validators.compose([Validators.required])),
        payment: new FormControl(null, Validators.compose([Validators.required])),
    }, { validator: this.checkLenghtTogether });
}

checkLenghtTogether(group: FormGroup): any {

    if (group) {
        const area = group.get('pref').value;
        const num = group.get('nim').value;
        if (area && num && (area.length + num.length) !== 10)
        return {phoneLength: true};
    }

    return null;
}

closeModal(): void {
    this.activeModal.dismiss();
}

changeMarketTarget(value) {
    if (value) {
        this.catalogService.getAllActivePayments(value).subscribe(
            data => {
                this.payments = data['body'];
            },
            error => {
                this.errorService.showError('Aviso Importante',
                    error['error']['description']);
            },
        );
    }
}

onSaveContinue() {
    const aditional = this.fillAditional(
        this.form.value.pref,
        this.form.value.nim,
        this.form.value.operator,
        this.form.value.market,
        this.form.value.markettarget,
        this.form.value.payment);

    this.passEntry.emit(aditional);

    this.form.reset();
}

onSaveClose() {
    const aditional = this.fillAditional(
        this.form.value.pref,
        this.form.value.nim,
        this.form.value.operator,
        this.form.value.market,
        this.form.value.markettarget,
        this.form.value.payment);

    this.passEntry.emit(aditional);

    this.activeModal.dismiss();
}

private fillAditional(nim: string, phone: string,
            operatorid: number, marketid: number, markettargetid: number,
            paymentid: number): AditionalNimVo {
    const aditional = new AditionalNimVo();
    aditional.phone = phone;
    aditional.pref = nim;
    aditional.operatorid = operatorid;
    aditional.operator = this.modalOperators.find(x => Number(x.id) === Number(operatorid))['name'];
    aditional.marketid = marketid;
    aditional.market = this.modalMarkets.find(x => Number(x.id) === Number(marketid))['name'];
    aditional.markettargetid = markettargetid;
    aditional.markettarget = this.modalMarkets.find(x => Number(x.id) === Number(markettargetid))['name'];
    aditional.paymentid = paymentid;
    const pay = this.payments.find(x => Number(x.id) === Number(paymentid));
    aditional.payment = pay['description'];

    return aditional;
}

}

As I mentioned before, digitOnly doesn't work for me here because I don't have a .module.ts to declare it. I tried declaring it in the app.module.ts but it didn't work either. Someone who can guide me how to use it or who has experienced the same thing with some other directive in this type of form??? Thank you at least for reading it.

I have a crm developed in Angular 7. At the time of the first entry (login), it takes almost 2 minutes to render the login screen. Once those 2 minutes have passed, no matter how many times I log out and log back in, it works very well and very smoothly. I suspect that package and components have been installed and that they are not used, which makes the app heavy on first load (it has nothing cached). Now... googling I found that the command exists:

npx depcheck

that analyzes the packages and others that are not used. The drawback is that the list of the NOT used appears to me, among others @angular/common, and that package or library I am using... sure, among them I use the Location. Another one I use is @angular/material because I use table. I show you an image of what it tells me that I do not use and some part of the code where I use it:

The same thing happens to me with the angular material table, I figure that @angular/material is unused but I use it. So the question is... how can I know which components or packages are not being used and remove them to see if the first load of the crm is relieved. Thanks in advance.

I am having a problem with an ngx-admin page created by me. I have created a fixed div, which does not move as a header, so that when the user scrolls that div is always at the top and so the information of my process is always seen. So far so good. The problem arises when the user expands the left side menu. All the part of the page responds well, except the fixed div that I put above. I leave you the following image, where it is shown when everything looks nice.

When I expand the left side menu, this happens:

The css of the top div is as follows:

.superior {
    position: fixed;
    z-index: 100;
    background: #f1f5f8;
    width: 92%;
    height: 200px;
    top: 3rem;
    border-bottom: $rojo-claro dotted 1px;
}

The truth is that I am very new with css and I did not find a way to solve it. I tried removing the "width: 92%" and it improves, but it doesn't cover the entire width of the screen. I really don't know how to tell it that if the menu is expanded, that the width is different. Another thing I tried was to put a large z-index on the left side menu, but that attempt never responded. I hope you can give me a hand, it is very important that I solve it. If you need more code, please ask me to edit and add it. Thanks in advance

I am using ngx-Admin with Angular 7 against a rest api developed in java with spring-boot. At the time of login, with my username and password, the rest api responds OK and gives me the token. Then, in my frontend, I created an HttpInterceptor to set my token on successive requests. So far there are no problems... the problem is that it doesn't send it. I set the token in the header and print it to the browser console, and it shows me correctly. In the next line, I send it and said header arrives without the token. Can you think of what could be happening? I leave you the code of my HttpInterceptor and some images of the console output.

import { Inject, Injectable, Injector } from '@angular/core';
import { HttpEvent, HttpHandler, HttpInterceptor, HttpRequest } from '@angular/common/http';
import { Observable } from 'rxjs';
import { switchMap, map  } from 'rxjs/operators';
import { NbAuthJWTToken } from '@nebular/auth';
import { NbAuthService } from '@nebular/auth';
import { NB_AUTH_TOKEN_INTERCEPTOR_FILTER } from '@nebular/auth';

@Injectable()
export class AuthInterceptor implements HttpInterceptor {

  constructor(private injector: Injector,
          @Inject(NB_AUTH_TOKEN_INTERCEPTOR_FILTER) protected filter) {
  }

      intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
// do not intercept request whose urls are filtered by the injected filter

if (!this.filter(req)) {
    return this.authService.isAuthenticatedOrRefresh()
      .pipe(
        switchMap(authenticated => {

          if (authenticated) {

              return this.authService.getToken().pipe(
                switchMap((token: NbAuthJWTToken) => {
                  const JWT = `Bearer ${token.getValue()}`;

                  req = req.clone({
                    setHeaders: {
                      Authorization: JWT
                    },
                  });
                  console.log('Ahora muestro el request!!!');
                  console.log(req);
                  return next.handle(req);
                }),
              )
          } else {
              // Request is sent to server without authentication so that the client code
              // receives the 401/403 error and can act as desired ('session expired', redirect to login, aso)
            return next.handle(req);
          }
        }),
      )
  } else {
  return next.handle(req);
  }
  }

  protected get authService(): NbAuthService {
    return this.injector.get(NbAuthService);
  }

}

In the following images I show you the results.

In the previous image you can see that I print the httprequest just before sending it.

In the previous image it is observed that the httprequest, just before sending it, has the desired values

And in the previous image we see that the request reaches the destination without the header and the token set. Can you think of what could be happening? Thank you all for at least reading it

I really have a question about existence, and as I progress it makes more noise and I really don't know if I'm doing things right. I have my own software, which I developed a few months ago... it works quite well for its purpose, but it turns out that they asked me for another one that has the same functionality as the previous one but adds additional features... that is, the first one is based on the second. What I came up with, is about the source set, defining a constant at the project level and adding preprocessor statements... at first it occurred to me that it was the best thing... that way it would only change in key places only when I need new classes of the new functionality...BUT as I progress I see that it gets complicated and the code becomes un-maintainable. I show parts so they can see what is happening to me.

#include "enginegraph.h"
#include "trackfarmgraph.h"
#ifdef __CORTE_SECCION__
#include "multiworkerdpathgraph.h"
#else
#include "workedpathgraph.h"
#endif
#include "pointsfarmgraph.h"

....in other parts of the project...

pointsGraph = NULL;
#ifndef __CORTE_SECCION__
    worker = NULL;
#else
    multiWorker = NULL; 
#endif
engine = NULL;
dlg = NULL;

....in other parts of the project...

#ifndef __CORTE_SECCION__
if (worker)
{
    disconnect(worker);
    delete worker;
    worker = NULL;
}
#else
if (multiWorker)
{
    disconnect(multiWorker);
    delete multiWorker;
    multiWorker = NULL;
}
#endif

if (track)
{
    disconnect(track);
    delete track;
    track = NULL;
}

With this I am noticing that the code becomes unreadable and with time it will be more so. The advantage I find is that if bugs appear in the common part, they are corrected and both software are OK... but I think the cost of unreadability and maintenance grows exponentially. How else can this be done? THANK YOU

I turn to you because I have a problem reading the serial port. It turns out that my demo runs correctly on windows but I don't get any kind of response on linux. The device to which I connect is an antenna, to which it is necessary to send the command "log gpgga ontime 1" + the carriage return. My code is the following:

void MainWindow::on_btnObtener_clicked()
{
    foreach(const QSerialPortInfo &info, QSerialPortInfo::availablePorts())
    {

        qDebug() << "Puerto: " << info.portName();
        qDebug() << "Nro. Serie: " << info.serialNumber();
        qDebug() << "Fabricante: " << info.manufacturer();
        qDebug() << "Descripcion: " << info.description();

        if (info.portName().trimmed().compare("ttyUSB0") == 0)
        {
            auxserial = new QSerialPort(info);
            auxserial->setBaudRate(QSerialPort::Baud9600);
            connect(auxserial, &QSerialPort::readyRead, this, &MainWindow::readData);

            if (auxserial->open(QIODevice::ReadWrite))
            {
                const QByteArray buffer = "log gprmc ontime 1";
                auxserial->write(buffer);
                auxserial->flush();

                const QByteArray fin = "\r\n";
                auxserial->write(fin);

                auxserial->flush();
                qInfo() << "Puerto Abierto correctamente";
                break;
            }
        }
    }
}

void MainWindow::readData()
{
    while(auxserial->canReadLine())
        qInfo() << auxserial->readLine();
}

Now, on windows it works correctly and even if I write the command wrong on purpose, it returns the response of the antenna with an error message emitted by the antenna. HOWEVER FROM LINUX, none of this happens... it tells me that the port is open correctly, but it doesn't respond either OK or ERROR. That could be happening?

EDIT: I just discovered that there are linux that have problems with the "CH341 USB Adapter"...in this case I'm using a Debian 9

Thank you

I need to read from an ip/port, through UDP and I can't. From an external utility, I see that the reader (RFID) reads correctly from said port/ip through UDP. Now, I want to read it from java and I can't (I clarify that it is the first time that I am going to read from a port/ip through java). My code is the following, I hope you can guide me:

package test_rfid_udp;

import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class Test_RFID_UDP {
  public static void main(String args[]) {
    try {
      int port = 2000;

      // Create a socket to listen on the port.
      DatagramSocket dsocket = new DatagramSocket();

      // Create a buffer to read datagrams into. If a
      // packet is larger than this buffer, the
      // excess will simply be discarded!
      byte[] buffer = new byte[2048];

      // Create a packet to receive data into the buffer
      InetAddress address = InetAddress.getByName("192.168.0.77");
      DatagramPacket packet = new DatagramPacket(buffer, buffer.length, address, 2000);

      // Now loop forever, waiting to receive packets and printing them.
      while (true) {
        // Wait to receive a datagram
        dsocket.receive(packet);

        // Convert the contents to a string, and display them
        String msg = new String(buffer, 0, packet.getLength());
        System.out.println(packet.getAddress().getHostName() + ": "
        + msg);

        // Reset the length of the packet before reusing it.
        packet.setLength(buffer.length);
      }
    } catch (Exception e) {
      System.err.println(e);
    }
  }
}

I also attach an image of the readings made with the utility. I hope you can help me.

Thank you

I'm new to Arduino and I'm having a problem with Arduino...I have 2 boards. One is an Arduino UNO and one is an Arduino Mega. I run the following little program in both, the only thing it does is clean the EEPROM memory and show how it turned out. The idea is that the output should always be 0 because memory is being erased. I put the code and the different outputs.

#include <EEPROM.h>

void EEPROMWriteInt(int address, int value); //2 Bytes, LE DIGO COMO GUARDAR
int EEPROMReadInt(int address);  

int32_t numberSens = 0; 
int32_t numberDESP = 0; 
int32_t numberGI = 0;
int32_t numberGD = 0;

void setup() {
  Serial.begin(9600);
  for (int nL = 0; nL < EEPROM.length(); nL++) { 
    EEPROM.write(nL, 0);
  }

  numberSens = EEPROMReadInt(1);
  numberDESP = EEPROMReadInt(3);
  numberGI = EEPROMReadInt(5);
  numberGD = EEPROMReadInt(7);

  Serial.print("numberSens ");
  Serial.println(numberSens);
  Serial.print("numberDESP ");
  Serial.println(numberDESP);
  Serial.print("numberGI ");
  Serial.println(numberGI);
  Serial.print("numberGD ");
  Serial.println(numberGD);
}

void loop() {

}

void EEPROMWriteInt(int address, int value) {
  byte hiByte = highByte(value);
  byte loByte = lowByte(value);

  EEPROM.write(address, hiByte);
  EEPROM.write(address + 1, loByte);   
}

int EEPROMReadInt(int address)
{
  byte hiByte = EEPROM.read(address);
  byte loByte = EEPROM.read(address + 1);

  return word(hiByte, loByte); 
}

So the output on Arduino UNO is:

numberSens 0
numberDESP 0
numberGI 0
numberGD 0

The output on Arduino MEGA is:

numberSens 4353
numberDESP 1408
numberGI 0
numberGD 256

Does anyone have an idea or a clue why this might be happening? I thank you in advance.

I'm trying to rotate a QGraphicsItem about its own center, so that its center doesn't move, it just rotates X degrees...I can't get it to happen, it changes places, as if the whole scene rotates but the rest of the elements don't rotate ...but he rotates but not about his center. I leave the code to see if they give me a hand. Thanks a thousand.

QRectF rect;
rect = engine->boundingRect();
QPointF center = rect.center();
qreal angle = grade;
QTransform t;
t.translate(center.x(), center.y());
t.rotate(angle);
t.translate(-center.x(), -center.y());
engine->setPos(t.map(engine->pos()));
engine->setRotation(engine->rotation() + angle);

Engine is the QGraphicsItem that I want to rotate about its center...

I have the following problem that I really can't find the solution. I have a QGraphicsItem, which has a size of 2000m X 2000m scaled on the screen. At a certain moment, I zoom, with which whatever is drawn in that QGraphicsItem looks bigger... now, how do I know at a certain moment, after zooming several times, how many meters wide and I'm seeing how high???...because if I ask the QGraphicsItem it always tells me 2000x2000...but having zoomed in, I'm seeing fewer meters on the screen. I can't put the real code because it has a lot of other things, but I'm going to put an approximation.

GridFarmGraph *grid = new GridFarmGraph(view->getWidth(), view->getHeight());

FarmGraph *farmGraph = new FarmGraph(2000);
farmGraph->setTransform(QTransform().scale(view->getWidth() / 2000, view->getHeight() / 2000);
farmGraph->setParentItem(grid);

GridFarmGraph is a graphicsitem that is below the size of the View. FarmGraph is a graphicsitem that is a child of GridFarmGraph and it is scaled so that on the screen it can simulate 2000m wide by 2000m high...so far so good...if I click with the mouse it really tells me where in those 2000x2000 clickie !. But when I zoom in, obviously on the screen, when everything gets bigger, I see less than 2000 x 2000 meters... what I need is to know how much I'm seeing.

I have a QPainterPath of a path of points, which is the path of a machine. I draw that path with a QPainterPathStroke and so far so good. The problem is that this path could pass over itself, that is, overlap or perhaps just brush it, and in that case I would like to be able to paint that part of the overlap with another color. Can you determine if a QPainterPath or QPainterPathStroke passes over itself? I leave you the code of what I have:

QPainterPath path;
path.moveTo(points.at(0));

int i=1;
while (i + 2 < points.size()) {
    path.cubicTo(points.at(i), points.at(i+1), points.at(i+2));
    i += 3;
}
while (i < points.size()) {
    path.lineTo(points.at(i));
    ++i;
}

QPainterPathStroker stroker;
stroker.setWidth(24);
QPainterPath stroke = stroker.createStroke(path);

painter->fillPath(stroke, QColor(0,255,0, 128));

points is a QVector. The width of the painterpathstroke is 24 because that is the width of the machine.

Here I upload an image, where you can see the crossing... it's the same qpainterpath that at one point does a kind of 8 and passes over itself

I receive positions on the plane and I want to draw the route. It is not a line, but a path... that is, I receive each point and generate a polygon that has a "working width" of 7, then each point I receive, I generate a polygon with a width of 7 and I join them . This is the code I generated:

void WorkedPathGraph::addPointToDraw(QPointF point)
{
    if (points.count() == 0)
        points.append(point);
    else
    {
        QPointF lastIns = points.last();
        QLineF aux1;
        aux1.setP1(lastIns);
        aux1.setP2(point);
        aux1.setLength(_anchoLabor / 2);
        aux1 = aux1.normalVector();

        QLineF lpt1;
        lpt1.setP1(aux1.p2());
        lpt1.setP2(aux1.p1());
        lpt1.setLength(_anchoLabor);

        QLineF aux2;
        aux2.setP1(point);
        aux2.setP2(lastIns);
        aux2.setLength(_anchoLabor / 2);
        aux2 = aux2.normalVector();

        QLineF lpt2;
        lpt2.setP1(aux2.p2());
        lpt2.setP2(aux2.p1());
        lpt2.setLength(_anchoLabor);

        QPolygonF newPol = QPolygonF(QVector<QPointF>() << lpt1.p1() << 
                 lpt1.p2() << lpt2.p1() << lpt2.p2());

        areas.append(newPol);
        path.addPolygon(newPol);

        points.append(point);
    }
    this->parentItem()->update();
}

What I do there is take the point I receive and help me with the previous one so that if it moved to one side, I take the perpendicular to the line that generates that point with the previous one to generate the polygon. ALL those polygons, I insert them in a QPainterPathand I draw them... BUT the graph comes out cut off... I need it to come out neat and the curves more CURVED. I leave you an image of how it looks to see if someone can guide me to improve it.

• areasis a QVector<QPolygonF>, which I use to accumulate the polygons and add the area that the machine covers.
• pointsis a QVector<QPointF>, that I accumulate the points that I receive to generate the polygons between the point that I receive and the last one that is stored in points.
• pathIt is a QPainterPaththat there I throw all the polygons to paint.

In the PAINT method what I do is:

void WorkedPathGraph::paint(QPainter *painter, const QStyleOptionGraphicsItem *item, QWidget *widget)
{
    Q_UNUSED(widget);

    QPen qpen, qpenOld;
    QBrush oldBrush;
    qpen.setColor(QColor(0, 255, 0, 128));

    qpen.setWidth(1);
    qpen.setCosmetic(true);

    qpenOld = painter->pen();
    oldBrush = painter->brush();
    painter->setPen(qpen);

    painter->setClipRect(item->exposedRect);
    painter->setBrush(QColor(0,255,0, 128));

    painter->drawPath(path.simplified());
    painter->setPen(qpenOld);
   painter->setBrush(oldBrush);
}

The idea is that there would be something like this (It doesn't have the same shape because I did it in paint):

I have a big problem reading/parsing large text files. The issue is the following: they are files that have many lines, about 150k lines and I have to read them and then parse the information. I do it through a fread, reading the ENTIRE file and then parsing it into memory with sscanf. The file format is relatively basic:

[HEADER]
Depth Measurement Unit = ft
Curve Description = 
Curve Measurement Unit = None
Source = imported
Module = ascii-import
[POINTS]
0.1000 78.4980
0.2000 78.6448
0.3000 78.7916
0.4000 79.1416
0.5000 79.6948
0.6000 80.2480
0.7000 80.3952
0.8000 80.5424
... siguen las lineas hasta aprox. 150mil y a veces mas.

To read it, I use the following code:

FILE *file;
char *buffer;
unsigned long fileLen;

//Open file
file = fopen(qPrintable(fullpathname), "rb");
if (!file)
{
    return;
}

//Get file length
fseek(file, 0, SEEK_END);
fileLen=ftell(file);
fseek(file, 0, SEEK_SET);

//Allocate memory
buffer=(char *)malloc(fileLen+1);
memset(buffer, '\0', fileLen + 1);
if (!buffer)
{
    fclose(file);
    return;
}

//Read file contents into buffer
fread(buffer, fileLen, 1, file);
fclose(file);

and then parses it, reading the lines and converting both columns of the POINTS section of the file to numbers. This is the complete reading and parsing code:

void LabCurveSA::loadPoints()
{
QString fullpathname = this->m_sPath + this->m_sName + WELL_CURVE_EXTENSION;

FILE *file;
char *buffer;
unsigned long fileLen;

//Open file
file = fopen(qPrintable(fullpathname), "rb");
if (!file)
{
    return;
}

//Get file length
fseek(file, 0, SEEK_END);
fileLen=ftell(file);
fseek(file, 0, SEEK_SET);

//Allocate memory
buffer=(char *)malloc(fileLen+1);
memset(buffer, '\0', fileLen + 1);
if (!buffer)
{
    fclose(file);
    return;
}

//Read file contents into buffer
fread(buffer, fileLen, 1, file);
fclose(file);

//Do what ever with buffer
const char *ptr = buffer;
char field [256] = "\0";
int n;
bool found = false;
char strstart[11] = "[POINTS]\r\0";
while ( sscanf(ptr, "%255[^\n]%n", field, &n) == 1 && !found)
{
    if (!found)
    {
        if (strcmp(field, strstart) == 0)
        {
            found = true;
        }
    }

    ptr += n;
    if ( *ptr != '\n' )
    {
        break;
    }
    ++ptr;
    memset(field, 0, 256);
}

if (found)
{
    int x = 0;
    bool val_ant_null = true;
    while ( sscanf(ptr, "%255[^\n]%n", field, &n) == 1)
    {
        const char *subptr = field;
        char parts[128] = "\0";
        int y;

        double depth, sample;
        QPointF p;

        bool firstnum = true, secondnum = true;
        if (sscanf(subptr, "%127[^ \t]%n", parts, &y) == 1)
        {
            try{
                depth = atof(parts);
            }
            catch(char *str)
            {
                Q_UNUSED(str);
                depth = 0;
                firstnum = false;
            }
            subptr +=y;
            ++subptr;
        }
        memset(parts, 0, 128);
        if (sscanf(subptr, "%127[^ \t]%n", parts, &y) == 1)
        {
            try{
                sample = atof(parts);
            }
            catch(char *str)
            {
                Q_UNUSED(str);
                sample = 0;
                secondnum = false;
            }
        }
        memset(parts, 0, 128);

        if (firstnum && secondnum)
        {
            if (dcomparer(depth, DEqual, 0.0, 4) && x != 0)
            {
                ptr += n;
                if ( *ptr != '\n' )
                {
                    break;
                }
                ++ptr;
                memset(field, 0, 256);
                continue;
            }

            if (x == 0 && val_ant_null && sample >= NULL_POINT)
            {
                ptr += n;
                if ( *ptr != '\n' )
                {
                    break;
                }
                ++ptr;
                memset(field, 0, 256);
                continue;
            }
            else
            {
                if (x != 0)
                {
                    val_ant_null = sample >= NULL_POINT;
                    if (val_ant_null)
                        x = -1;
                }
            }

            if (sample < NULL_POINT)
            {
                if (sample > m_dMax)
                    m_dMax = sample;

                if (sample < m_dMin)
                    m_dMin = sample;
            }

            p.setX(sample);
            p.setY(depth);

            this->m_arPoints.append(p);
            x++;
        }

        ptr += n;
        if ( *ptr != '\n' )
        {
            break;
        }
        ++ptr;
        memset(field, 0, 256);
    }

    if (this->m_arPoints.count() > 0)
    {
        //if (this->m_arPoints.at(0).x() >= NULL_POINT)
        while(this->m_arPoints.at(0).x() >= NULL_POINT)
            this->m_arPoints.remove(0);
    }

    if (this->m_arPoints.count() > 0)
    {
        if (this->m_arPoints.at(this->m_arPoints.count() - 1).x() >= NULL_POINT)
            this->m_arPoints.remove(this->m_arPoints.count() - 1);
    }
}

free(buffer);
}

This process takes a long time...what alternatives exist?...someone told me that it can be saved as a binary inside an xml and that this would increase the reading speed. Can someone give me an idea how I can speed up this reading and/or writing process? Thank you

I have a warning that I can't remove...it tells me "deprecated conversion from string constant to char*". The code where it complains is the following:

class THREE_DATA_4_COMPUTE
{
    public:
        THREE_DATA_4_COMPUTE(const QString &cn, char* umn = "", const QString &un = (const QString)"")
        {
            this->curveName = cn;
            this->unitModuleName = umn;
            this->unitName = un;
        };
        QString curveName;
        char* unitModuleName;
        QString unitName;
    protected:
        THREE_DATA_4_COMPUTE(){};
};

and I call it as follows, passing only 1 parameter (hence I need the defaults):

THREE_DATA_4_COMPUTE *aux = new THREE_DATA_4_COMPUTE(this->getRmft());

What is wrong?. I am with c++, Qt 4.8 and linux.

I have the following 2 tables orderand tracking. The structures are the following:

Order( columns and data ):

id fecha       nroorder description
1  2017-22-01  1000001  Order1
2  2017-22-01  1000002  Order2
3  2017-22-01  1000003  Order3

Tracking( columns and data ):

id idorder idstatus
1  1       1
2  1       2
3  1       3
4  2       1
5  2       2
6  3       1
7  3       2

The point to all this is that I need it to return each orderwith the trackinghighest idstatus, that is, I need it to return:

order.id order.fecha order.nroorder order.description tracking.idstatus
1        2017-22-01  1000001        Order1            3
2        2017-22-01  1000002        Order2            2
3        2017-22-01  1000003        Order3            2

I tried the following statement (actually several but this is the closest one):

SELECT `order`.*, d.*
 FROM `order` left JOIN (SELECT tracking.* 
         FROM tracking
        ORDER BY tracking.id DESC limit 1) d
ON `order`.`id` = d.idorder

I trackingorder it by id, to remove the last one, because by business rule trackingthey increase their idstatusas they are inserted.

What is wrong or what am I missing?

It turns out that I have a component to register articles in angular2. When I create the empty component, the validations are done correctly. Now, when I use the same component to edit an article and initialize the form with data, it is not validated. That could be happening?.

I put the sources... article-form.component.ts

import { Component, ViewEncapsulation, OnInit, ViewChild } from '@angular/core';
import { Router, ActivatedRoute } from '@angular/router';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';
import { DropdownModule, ModalDirective } from 'ng2-bootstrap';
import { ToasterContainerComponent, ToasterService } from 'angular2-toaster';

import { WSRESTArticle } from '../../../../services/article.services';
import { ArticleVO } from  '../../../../services/ArticleVO';


@Component({
selector: 'article',
providers: [ToasterService],
template: require('./article-form.html'),
encapsulation: ViewEncapsulation.None
})
export class ArticleFormComponent implements OnInit {
@ViewChild('childModal') childModal: ModalDirective;
private toasterService: ToasterService;

public trxForm;

title : string;
caption: string;
add: boolean;
idarticle: number;

states = [{"id": 1, "state": 'Habilitado'}, {"id": 0, "state": 'Inhabilitado'}];

constructor(public fb: FormBuilder, 
            private router: Router,
            private route: ActivatedRoute, 
            protected serviceArticle: WSRESTArticle,
            toasterService: ToasterService) {

    console.log('Article-Form constructor');
    this.toasterService = toasterService;

    this.trxForm =this.fb.group({
      description:  ["", [Validators.required]],
      price:        ["", [Validators.required, Validators.pattern('^[0-9]+(\.[0-9]{1,2})?$')]],
      flagenabled:  ["", [Validators.required]]
    });
}

ngOnInit() {
    var id = this.route.params.subscribe(params => {
      var id = params['id'];

      this.title = id ? 'Editar Artículo' : 'Agregar Nuevo Artículo';
      this.caption = id ? 'Confirmar cambios' : 'Confirmar alta';
      this.add = id ? false : true;

      if (!id)
          return;

      this.idarticle = id;

      this.serviceArticle.Get(this.idarticle)
          .subscribe((data:ArticleVO) => this.fillArticleForm(data),
          error => console.log(error),
          () => console.log('Get article complete'));
    });
}

doCleanPrepare(): void {
  this.trxForm.reset();
}

goBack(): void {
  this.router.navigate(['pages/articles']);
}

doPost(): void {
    if (!this.idarticle)
    {
      this.serviceArticle
        .Add(this.trxForm.value.description, this.trxForm.value.price, this.trxForm.value.flagenabled.id)
        .subscribe((data:string) => {
          console.log(data);
          this.toasterService.pop('success', 'Agregar Artículo', 'Artículo insertado correctamente!.');
        },
        error => {
          console.log(error);
          this.toasterService.pop('error', 'Agregar Artículo', 'Error - El Artículo no puedo ser agregado!.');
        },
        () => console.log('insertar article finalizado'));
    }
    else {
      let article = new ArticleVO();
      article.description = this.trxForm.value.description;
      article.price = this.trxForm.value.price;
      article.flagenabled = this.trxForm.value.flagenabled.id;

      this.serviceArticle
        .Update(this.idarticle, article)
        .subscribe((data:ArticleVO) => {
          console.log(data);
          this.toasterService.pop('success', 'Editar Artículo', 'Artículo actualizado correctamente!.');
        },
        error => {
          console.log(error);
          this.toasterService.pop('error', 'Editar Artículo', 'Error - El Artículo no puedo ser actualizado!.');
        },
        () => console.log('actualizar article finalizado'));
    }
}

private fillArticleForm(data:ArticleVO): void {

    this.trxForm = this.fb.group({
      description: data.description,
      price: data.price,
      flagenabled: this.states.find(myobj => myobj.id == data.flagenabled)
    });
}

}

article-form.html

<div class="widgets">
<toaster-container></toaster-container>
  <div class="row">
    <button class="btn btn-success col-lg-1" (click)="goBack()">Regresar</button>
    <h3 class="col-lg-11">{{title}}</h3>
  </div>
</div>
<br>

<div class="row">
  <form [formGroup]="trxForm">
    <div class="form-group" [ngClass]="{'has-error':!trxForm.controls['description'].valid && trxForm.controls['description'].touched}">
      <label for="description">Descripción</label>
      <input formControlName="description" type="text" class="form-control" id="description" placeholder="Descripción">
      <div *ngIf="!trxForm.controls['description'].valid && trxForm.controls['description'].touched">
        <p *ngIf="trxForm.controls['description'].hasError('required')" class="alert alert-danger">* El campo Descripción es obligatorio</p>
      </div>
    </div>

<div class="form-group" [ngClass]="{'has-error':!trxForm.controls['price'].valid && trxForm.controls['price'].touched}">
  <label for="price">Precio</label>
  <input formControlName="price" type="text" class="form-control" id="price" placeholder="Precio">
  <div *ngIf="!trxForm.controls['price'].valid && trxForm.controls['price'].touched">
    <p *ngIf="trxForm.controls['price'].hasError('required')" class="alert alert-danger">* El campo Precio es obligatorio</p>
    <p *ngIf="trxForm.controls['price'].hasError('pattern')" class="alert alert-danger">* El campo Precio debe ser numérico</p>
  </div>
</div>

<div class="form-group" [ngClass]="{'has-error':!trxForm.controls['flagenabled'].valid && trxForm.controls['flagenabled'].touched}">
  <label for="flagenabled">Habilitado</label>
  <select formControlName="flagenabled" name="flagenabled" class="form-control">
    <option [ngValue]="i" *ngFor="let i of states" >{{i.state}}</option>
  </select>
  <div *ngIf="!trxForm.controls['flagenabled'].valid && trxForm.controls['flagenabled'].touched">
    <p *ngIf="trxForm.controls['flagenabled'].hasError('required')" class="alert alert-danger">* El campo Habilitado es obligatorio</p>
  </div>
</div>

<button class="btn btn-danger" [disabled]="!trxForm.valid" (click)="doPost()">{{caption}}</button>
<button class="btn btn-success" [hidden]="!add" (click)="doCleanPrepare()">Limpiar y Preparar Nuevo</button>

  </form>
</div>
<br>

I have a jquery DataTable that has a column whose data is 1 or 0. I, through the render method, change said value for an image in the following way:

    "columns": [
    {data: 'codigo'},
    {data: 'tipolote' },
    {data: 'activo', width: '10', className: 'text-center',
            'render' : function(data, type, row) {
                return (data == 1) ? '<span class="glyphicon glyphicon-ok"></span>' : '<span class="glyphicon glyphicon-remove" value="0"></span>';
            }},
    ...
    ]

The drawback is that when I type something in the search textbox of the DataTable, an error is generated. If I remove the Active column, the search is done correctly, filtering what corresponds. I understand that when I remove the value 1 or 0 and put an image, I lose just the value and cannot do the search. Is there any way to remedy this problem?

How can I center a <span class="glyphicon"></span>within <td>a table? It's a bit cumbersome to put them on theme...I'm using Laravel 5.2 and jquery's DataTable. It is a column that gives me values ​​1 or 0 and I, in my javascript, replace it with a glyphicon if it is a value of 1 or if it is a value of 0 to obtain the image that I am attaching. The issue is that I would like it to be centered (Active column):

I am using jquery dataTables and I want to add a filter combo for a specific field in the location after "Search"... is this possible? I've already seen examples that you can add comboxes in the footer, under each column of the table and filter that way, but aesthetically I don't like it and besides, I just need a filter combo.