@JKSH said in How do I append characters of a QString to another QString in a neat way?:

Anyway, you could simplify the whole thing:
QDateTime now = QDateTime::currentDateTime();

QString yyyy = now.toString("yyyy");
QString MM = now.toString("MM");
QString dd = now.toString("dd");
QString HH = now.toString("HH");
QString mm = now.toString("mm");
QString ss = now.toString("ss");

This is ideally the best general solution, IMHO

@VRonin said in Number of characters that fit into given width:

Something like http://doc.qt.io/qt-5/qfontmetrics.html#elidedText ?

Turns out it will not work for me.

The QString returned includes the ellipsis and there is no way to avoid them, because passing Qt::ElideNone means "do not truncate" instead of "omit the ellipsis" (as I feared).

Here are a couple of variations that worked for me in Visual Studio 2017:

diac = QStringLiteral("ÀÉ"); uint chin[] = {0x4E83, 0}; // L'亃' diac2 = QString::fromUcs4(chin); wchar_t chinW[] = {L'亃', 0}; wchar_t *chinW2 = L"亃"; diac3 = QString::fromWCharArray(chinW2); // also chinW diac += diac2 + diac3;

Sorry I just realized you want to go the other way.

@Kushan Simple C++:

class Dialog2 : public QDialog { Q_OBJECT private slots: void receiveValue2 (QString val) public: QString Value explicit Dialog2(QWidget *parent = 0); ~Dialog2(); void setValue(const QString &val) { Value=val; } private: Ui::Dialog2 *ui; }; ... void MainWindow::on_pushButton_clicked() { value=ui->line_Edit->text(); Dialog dialog1; dialog1.setValue(value); }

Hi
Normally its the
myList[x] that can give "index out of range error"

not when inserting ?

@SGaist Dman that was silly mistake :(

While I'm here, you can use https://github.com/VSRonin/Qt-Model-Serialisation/tree/dev

CsvModelSerialiser modelSaver; modelSaver->setModel(ui->tableWidget_2->model()); modelSaver->setCsvSeparator(" "); QFile mFile("C:/Users/Desktop/Qt/textfiles/test.txt"); modelSaver->saveModel(&mFile);

Hi ... oh yes i read line by line.. each line have other language to detect.. wich so much text in over 200 or more language...
google the file name test_shuffle_1000_48_666.utf8.gz
i tested for https://github.com/pehohlva/QCLD2 for language detection ..
the error was unclosed array cycle that fill ram... not QString... have incremented all line... :-) & must go in assert -

One small note, you are wasting CPU cycle here. The QRegularExpressionMatchIterator returns only match objects that contains a match thus the if is useless.

Then use "<br>" instead of "\n"

ah thanks - using \\1 instead of $1 works as i want it.

And thanks for the other solution with the For-Loop.

Sure, they are in the docs: http://doc.qt.io/qt-5/qregexp.html#code-examples

indexIn() method should interest you in this case.

Thanks for the report !

I was thinking more about QTBUG-47316.

@Rohith
instead of converting the unicode string to the escaped characters send it directly in binary form. When you have a QString already you can call QString::toUtf8() and send the returned QByteArray directly. On the client its enough to do QString::fromUtf8( receivedUtf8ByteArray.constData() )

It depends how you implemented the transfer.
But theoretically it should be enough to replace your unicode escaping code on the server with this approach.

Thanks !! I just figured it out after reading Docs !!

Thanks for replying (y)

@micland

WOOW!!! Thank you sooo much micland!! It works!!!
I tried a code similar to yours but some data were missing. Just needed to do a very tiny modification on your code:

qDebug() << key << value.variant().toString();

or directly

qDebug() << value.variant().toString();

Except it, it is perfect! Thank you again.
@micland said:

I have no clue why the qdbusviewer of Qt 5.6 is unable to call the DBus method but the code snippet above is working fine.

I hope it is going to change as I intend to use it or the 5.7 version very soon.

Cheers again.

@Mandar-Khire If you change your basic C++ program like this then you will not see the output as well:

#include <iostream> using namespace std; int main() { cout << "Hello World by C++!"; while(true); return 0; }

Qt uses an event loop, so after executing

void Widget::on_showButton_clicked() { cout << "Hello World by QT!"; }

your program is "sleeping" in the event loop and not flashing cout buffer.

Hi @Wieland ,

I did not test the code. But Yes, you are right. I tested @Punit 's code after my comment. It worked for me too(missed only that semicolon).

If .toAscii() worked for you before, you can savely use .toLatin1(), too, and ^Z will be preserved.

Thank you a lot for quick and exact answer!

Thank you.

The assertion is expected behaviour for QString::at

The position must be a valid index position in the string (i.e., 0 <= position < size()).

Instead, you should do something like:

if (5 >= a.size()) { out << "Outside the range of the string" << endl; }

Cheers.

@the_ @SGaist Hi, I managed to solve it on my own by encoding the date to a JulianDate and using juliandate on my db so it's much easier to compare and so.

Thanks for your help.

@mrjj Thanks Mrjj :) it went perfect, you're awesome haha ;)

@kshegunov Thank you so much for the help! Such a simple mistake

@mrjj that is right :D

I solved my problem with not calling parseFunction in its own class constructor but with signals and slots in mainwindow.cpp file:

connect(xml, SIGNAL(started()), first, SLOT(parseFunction()));

Thanks, i think i will do it so :)

You can use a regular expression in a loop:

QString s = "806982"; QRegExp re("([\\da-fA-F]{2})"); // exactly 2 hex digits QStringList l; int pos = 0; while ((pos = re.indexIn(s, pos)) != -1) { l << re.cap(1); pos += re.matchedLength(); }

#include <QApplication> #include <QTextEdit> #include <QDebug> #include <QPalette> #define SET_BG_COLOR(edit, color)\ QPalette palette;\ palette.setColor(QPalette::Base, (color));\ palette.setColor(QPalette::Text, (color) == Qt::red ? Qt::white : Qt::black);\ (edit).setPalette(palette); // вот функция которая тебе нужна // возвращает: // -1: одна из строк пустая // 0: не нашли // 1: нашли int findText(const QString &textEdit, const QString &textFile){ // если один из текстов пустой if(!textEdit.length() || !textFile.length()){ return -1; } // означает: читать строку до символа разделителя, включает (пробел, -, _) QRegExp rx("[^ \\-_]*"); // находим строку до разделителя if (rx.indexIn(textEdit) != -1){ // отрезаем строку до разделителя" QString find = textEdit.left(rx.matchedLength()); // производим поиск в тексте return textFile.indexOf(find) != -1; } return 0; } int main(int argc, char *argv[]) { QApplication app(argc, argv); const QString textFile = "Помогите плиз, нужно с текста в textEdit выбрать " "слово и проверить есть ли такое слово в " "файле, собственно мне нужна помощь с textEdit не могу " "понять как взять из него слово до " "разделительного символа и ввести его в переменную типа QString"; QTextEdit edit; // при изменении текста будем делать проверку QObject::connect(&edit, &QTextEdit::textChanged, [&edit, &textFile](){ QColor color = Qt::white; switch(findText(edit.toPlainText(), textFile)){ case -1: break; // цвет по умолчанию белый case 0: color = Qt::red; break; case 1: color = Qt::green; break; } SET_BG_COLOR(edit, color); }); edit.show(); return app.exec(); }

Reading that report and thinking about it it makes sense that it is not an actual bug.

For [a-z] it should not be escaped, since you want to match all characters from a up to character z.

For [a\-z] you want to match character a, or character hyphen or character z.

Primero tendrás que convertir estas horas a números enteros. Luego podrás calcular y posteriormente sacar el valor en texto usando QString::number(int);

Puedes usar QString.split para separar las horas y minutos y hacer la resta por separado. Luego, para juntarlo puedes hacer esto: QString(QString::number(int) + ":" + QString::number(int));

A more simpler solution:

QTime time1 = QTime::fromString("11:00", "HH:mm"); QTime time2 = QTime::fromString("10:00", "HH:mm"); qDebug() << QTime::fromMSecsSinceStartOfDay(time2.msecsTo(time1));

@MXXIV said:

So QString::asprintf known in Qt4 was removed in Qt5.

It's QString::sprintf() that was in Qt 4 but removed in Qt 5.

Qt 5.5 introduced QString::asprintf() (and QString::vasprintf()), in fact: http://code.woboq.org/qt5/qtbase/src/corelib/tools/qstring.cpp.html#_ZN7QString8asprintfEPKcz (Hmm... there seems to be a documentation bug, and these functions aren't showing up. However, they are there for you to use)

qDebug().noquote() << QString("I have properly opened file %1").arg(fileName);

But please... don't use non-ascii characters in source code. That's just being mean to others.

Oh well. I didn't have a reason for doing that, it was just plain ignorance.
I corrected that, and also one more thing. I eliminate the std::string from

std::string strtmp(attr->value()); oCol.item(i-1)->setText(QString::fromStdString(strtmp));

Standard c++ strings might not cope well with UTF-8 encoding. So I changed it to

QString strtmp(attr->value()); oCol.item(i-1)->setText(strtmp);

These two changes combined have solved it. Thank you very much!