General and Desktop

@CuriousPan said in QDateTimeAxis - how to set format of date the same as system has, but without time?: QDateTimeAxis Should you feel brave and actually spend 30 seconds looking into the documentation, like I did, you would notice that there is a setFormat() method: https://doc.qt.io/qt-5/qdatetimeaxis.html#format-prop And that it takes well known format strings from QDateTime: https://doc.qt.io/qt-5/qdatetime.html#toString

@ mrjj why can't I get a full circle ??? #include "krug_qt.h" Krug_qt::Krug_qt(QWidget *parent) : QMainWindow(parent) { R = 90.0; q = 24; p = 24; kol_toch = 180; } Krug_qt::~Krug_qt() { } void Krug_qt::fillVertexArray() { float grad = 360.0/kol_toch; float grad_kol_toch = 0.0; // градусы*M_PI/180 = радианы int j; for (j = 0; j <= kol_toch; ++j){ integerVector.append(R * cos(grad_kol_toch*M_PI/180.0)); integerVector.append(R * sin(grad_kol_toch*M_PI/180.0)); grad_kol_toch = grad_kol_toch + grad; } } void Krug_qt::paintEvent(QPaintEvent *event) { integerVector.clear(); QPainter painter(this); // Создаём объект отрисовщика QPen pen_abris(Qt::black, 2, Qt::SolidLine, Qt::FlatCap); // кисть обрисовки (компаса) painter.setRenderHint(QPainter::Antialiasing); // убираем резкие кубики painter.setPen(pen_abris); // Устанавливаем кисть обрисовки fillVertexArray(); // Набираем массив painter.translate(this->width()/2, this->height()/2); // смещение отрисовки qDebug() << integerVector.size(); int f = 0; for(int i =0; i<integerVector.size()/2; i++) { i++; f++; painter.drawPoint(QPointF(integerVector[--i],integerVector[i])); qDebug() << "f :"<<f; // painter.drawPoint(QPointF(integerVector[i],integerVector[i++])); // i++; } } [image: b782ea31-6cc8-4d5e-815c-3a70041efd3d.png]

I have decided to change my funtion. QWidget* addPushButtonInTableCell(U2bYTES row, U2bYTES column, U2bYTES numberToPushButton, QTableWidget * pTableWidget , QWidget* parent, QString ruta, const char* slot) { QWidget *pWidget = new QPushButton(QString::number(numberToPushButton),parent); ... return pWidget; } Invoke QWidget* pWidget = addPushButtonInTableCell(0,15,pQ->u.cue.n, tableWidget , pMW->options, ":/ui/recursos/ExtrasInsert.png"); QObject::connect(pWidget,SIGNAL(clicked()), pMW->options, SLOT(on_pushButton_newJump_clicked())); It works fine.

@Sai-Raul Look : https://doc.qt.io/qt-5/qscrollarea.html Whitout Qlablel.. There is QGraphicsScene with QGraphicsView.

@Mihan said in How to uncheck the action on the toolbar: So does it meen I must setChecked(false) by myself in lower version? Yes.

@Argostin Good job!

@Sai-Raul ok. but Qlabels only likes pixmaps.

@Rashed cmake is not relevant. That is just for building your project. Start by reading Signals & Slots, you need to understand this concept before you can achieve anything in Qt. Then connect() your QPushButton::clicked signal to a slot you write, or an inbuilt slot on a Qt widget, which opens a new window, e.g. some kind of QWidget::show(). a new window (which is again editable) "Windows" are not "editable". Depends what you really mean here.

Hi Robert, I have exactly the same problem as you described. Did you manage to solve it ? Thank you. Regards

deleteLater will be called in the order of the signal handlers were attached. However, it won't actually delete well after all the other signals have been handled. QObject obj1; QObject ob2; obj1.connect(&obj1, &QObject::somesig, &obj1, &QObject::deleteLater); obj1.connect(&obj1, &QObject::somesig, &obj2, &QObject::otherslot); This will call deleteLater before otherslot. But the delete won't happen until after these signals have been handled. It won't be until the next iteration of the event loop. It is common to use deleteLater with network response objects in addition to handlers on the finished (?) signal. This will cause the object to clean itself up, but the handler will also have an opportunity to "handle" the data.

Hi, Are you calling that code from a slot connected to the QCheckBox::stateChanged signal ? In any case, it could be simplified: pTable->setVisible(hideCheckBox->checkState() == Qt::Unchecked);

@SPlatten AFAIK, QSqlQuery::record() is to be used after QSqlQuery::exec() to get the field information of the current query. So you can find the indexes of the value and decode faster the results: if(query.exec("SELECT * from MyTable where status = 2")) { auto record = query.record(); int nameCol = record.indexOf("name"); while(query.next()) qDebug() << "Found:" << query.value(nameCol ).toString(); } Which is faster as using query.value("name").toString()

Finally I use an QLineEdit for editing and use QGraphicsTextItem only to display with setFlag(QGraphicsItem::ItemClipsChildrenToShape, true); See the result : [image: dev05.gif]

@kook said in having trouble reading from textstream: QString str = in.readAll(); ... while (in.readLineInto(&line)) If you have already done a readAll() from the stream, where do you expect a subsequent readLineInto() to start reading from? Either do your work on the str containing all the read data or don't do that and do the readLineInto(), not both. Or if you do want to use both as you have shown, it is not surprising you have to go datafile.seek(pos); to reposition the reader; but I would either do everything off the str or everything off the in.

@KroMignon said in Proper use of QPrivateSignal: @jeremy_k said in Proper use of QPrivateSignal: Did you try the code above? QTimer::timeout is a private signal, and yet still callable using a clang 13 C++. Sorry, now I understand what you are meaning... sad situation :( Or curious. I don't know if this is a failure with Qt, C++, or my understanding.