How to make the QCompleter read from a QString?

[Blaster]

Hi guys, I'm working on an app a little different from many of the ones that are spoken in this forum, I want to complete words from a string in a data structure .

[VRonin]

error C2065: 'data structure' : undeclared identifier

please define what you mean. maybe provide an example?

[Blaster]

@VRonin
what I mean is that the QCompleter read a QString and not a QTextEdit or QLineEdit

[VRonin]

Can you provide an example of what you want to achieve?
something like: "I type a string in a QLineEdit and I want QCompleter to complete using a list of strings I have in a database"

[Blaster]

@VRonin
That is not what I want to do. I'm writing a QTextEdit, but in a QString am keeping what am writing, without showing what is in the QTextEdit, then, I want to complete what is in the QString with a database in a file

[VRonin]

with a database in a file

If you mean a SQLite DB then just use a QSqlTableModel as QSqlQueryModel with setModel()

want to complete what is in the QString

call setCompletionPrefix() with the string you want to complete and just iterate through the completions

[Blaster]

@VRonin

It is not a database, it is a file with a long list of words

If you mean a SQLite DB then just use a QSqlTableModel as QSqlQueryModel with setModel()

Thanks

[VRonin]

Then read all the words in a QStringList and use a QStringListModel with setModel()

[Blaster]

@VRonin

Then read all the words in a QStringList and use a QStringListModel with setModel()

I know how to do that part. Thanks again.

By using the setCompletionPrefix() funtion the QCompleter does not work. Can you show me how you do it

[VRonin]

#include <QFile>
#include <QApplication>
#include <QDebug>
#include <QCompleter>
#include <QTextStream>
#include <QStringList>
#include <QStringListModel>

void createBaseFile();

int main(int argc, char *argv[])
{
    QApplication app(argc,argv);
    createBaseFile();
    QFile baseFile("baseFile.txt");
    QStringList baseList;
    if(baseFile.open(QIODevice::ReadOnly | QIODevice::Text)){
        QTextStream baseFileStream(&baseFile);
        QString line;
        while (baseFileStream.readLineInto(&line)) {
            baseList << line;
        }
    }
    QStringListModel baseListModel(baseList);
    QCompleter baseCompleter;
    baseCompleter.setModel(&baseListModel);
    baseCompleter.setCompletionPrefix("in"); // word to complete
    for (int i = 0; baseCompleter.setCurrentRow(i); i++)
        qDebug() << baseCompleter.currentCompletion() << " is match number " << i;
    return 0;
}
void createBaseFile(){ //generate a random words "database"
    QFile baseFile("baseFile.txt");
    if(baseFile.open(QIODevice::WriteOnly | QIODevice::Text)){
        QTextStream baseFileStream(&baseFile);
        baseFileStream
                << "Lorem" << '\n'
                << "ipsum" << '\n'
                << "dolor" << '\n'
                << "sit" << '\n'
                << "amet" << '\n'
                << "consectetur" << '\n'
                << "adipiscing" << '\n'
                << "elit" << '\n'
                << "Ut" << '\n'
                << "accumsan" << '\n'
                << "suscipit" << '\n'
                << "ipsum" << '\n'
                << "blandit" << '\n'
                << "consectetur" << '\n'
                << "lectus" << '\n'
                << "cursus" << '\n'
                << "vitae" << '\n'
                << "Donec" << '\n'
                << "velit" << '\n'
                << "odio" << '\n'
                << "iaculis" << '\n'
                << "a" << '\n'
                << "dictum" << '\n'
                << "id" << '\n'
                << "tincidunt" << '\n'
                << "et" << '\n'
                << "sem" << '\n'
                << "Morbi" << '\n'
                << "metus" << '\n'
                << "metus" << '\n'
                << "fringilla" << '\n'
                << "in" << '\n'
                << "ante" << '\n'
                << "in" << '\n'
                << "aliquet" << '\n'
                << "condimentum" << '\n'
                << "erat" << '\n'
                << "Cras" << '\n'
                << "lectus" << '\n'
                << "libero" << '\n'
                << "consectetur" << '\n'
                << "et" << '\n'
                << "metus" << '\n'
                << "vitae" << '\n'
                << "maximus" << '\n'
                << "efficitur" << '\n'
                << "enim" << '\n'
                << "Vivamus" << '\n'
                << "sit" << '\n'
                << "amet" << '\n'
                << "pellentesque" << '\n'
                << "nibh" << '\n'
                << "Curabitur" << '\n'
                << "dapibus" << '\n'
                << "diam" << '\n'
                << "laoreet" << '\n'
                << "consequat" << '\n'
                << "purus" << '\n'
                << "at" << '\n'
                << "finibus" << '\n'
                << "enim" << '\n'
                << "Orci" << '\n'
                << "varius" << '\n'
                << "natoque" << '\n'
                << "penatibus" << '\n'
                << "et" << '\n'
                << "magnis" << '\n'
                << "dis" << '\n'
                << "parturient" << '\n'
                << "montes" << '\n'
                << "nascetur" << '\n'
                << "ridiculus" << '\n'
                << "mus" << '\n'
                << "Quisque" << '\n'
                << "suscipit" << '\n'
                << "massa" << '\n'
                << "at" << '\n'
                << "lobortis" << '\n'
                << "iaculis" << '\n'
                << "dui" << '\n'
                << "mi" << '\n'
                << "dictum" << '\n'
                << "lacus" << '\n'
                << "eget" << '\n'
                << "dictum" << '\n'
                << "metus" << '\n'
                << "nulla" << '\n'
                << "id" << '\n'
                << "nibh" << '\n'
                << "Nullam" << '\n'
                << "dapibus" << '\n'
                << "lectus" << '\n'
                << "sit" << '\n'
                << "amet" << '\n'
                << "augue" << '\n'
                << "tempus" << '\n'
                << "ultricies" << '\n'
                << "Maecenas" << '\n'
                << "eleifend" << '\n'
                << "dolor" << '\n'
                << "eget" << '\n'
                << "porttitor" << '\n'
                << "vehicula" << '\n'
                << "Vivamus" << '\n'
                << "iaculis" << '\n'
                << "sodales" << '\n'
                << "rutrum" << '\n'
                << "Nulla" << '\n'
                << "ultricies" << '\n'
                << "ligula" << '\n'
                << "tellus" << '\n'
                << "id" << '\n'
                << "tempus" << '\n'
                << "odio" << '\n'
                << "congue" << '\n'
                << "ac" << '\n'
                << "Maecenas" << '\n'
                << "porttitor" << '\n'
                << "finibus" << '\n'
                << "libero" << '\n'
                << "quis" << '\n'
                << "facilisis" << '\n'
                << "enim" << '\n'
                << "scelerisque" << '\n'
                << "at" << '\n'
                << "Proin" << '\n'
                << "et" << '\n'
                << "nibh" << '\n'
                << "dui" << '\n'
                << "Vestibulum" << '\n'
                << "non" << '\n'
                << "consequat" << '\n'
                << "odio" << '\n'
                << "non" << '\n'
                << "sodales" << '\n'
                << "nibh" << '\n'
                << "Phasellus" << '\n'
                << "lobortis" << '\n'
                << "ante" << '\n'
                << "at" << '\n'
                << "dignissim" << '\n'
                << "interdum" << '\n'
                << "Vestibulum" << '\n'
                << "magna" << '\n'
                << "mauris" << '\n'
                << "aliquam" << '\n'
                << "nec" << '\n'
                << "erat" << '\n'
                << "eget" << '\n'
                << "lacinia" << '\n'
                << "pretium" << '\n'
                << "lacus" << '\n'
                << "Donec" << '\n'
                << "sollicitudin" << '\n'
                << "maximus" << '\n'
                << "ex" << '\n'
                << "nec" << '\n'
                << "finibus" << '\n'
                << "turpis" << '\n'
                << "dictum" << '\n'
                << "et" << '\n'
                << "Cras" << '\n'
                << "bibendum" << '\n'
                << "tellus" << '\n'
                << "ac" << '\n'
                << "suscipit" << '\n'
                << "egestas" << '\n'
                << "eros" << '\n'
                << "metus" << '\n'
                << "mattis" << '\n'
                << "augue" << '\n'
                << "vitae" << '\n'
                << "sagittis" << '\n'
                << "elit" << '\n'
                << "augue" << '\n'
                << "a" << '\n'
                << "mi" << '\n'
                << "Nullam" << '\n'
                << "venenatis" << '\n'
                << "commodo" << '\n'
                << "aliquam" << '\n'
                << "Duis" << '\n'
                << "sed" << '\n'
                << "mi" << '\n'
                << "dignissim" << '\n'
                << "maximus" << '\n'
                << "ipsum" << '\n'
                << "sit" << '\n'
                << "amet" << '\n'
                << "venenatis" << '\n'
                << "diam" << '\n'
                << "Praesent" << '\n'
                << "ullamcorper" << '\n'
                << "luctus" << '\n'
                << "maximus" << '\n'
                << "Nulla" << '\n'
                << "ac" << '\n'
                << "consectetur" << '\n'
                << "sem" << '\n'
                << "Sed" << '\n'
                << "eu" << '\n'
                << "dui" << '\n'
                << "in" << '\n'
                << "eros" << '\n'
                << "mattis" << '\n'
                << "aliquam" << '\n'
                << "Suspendisse" << '\n'
                << "potenti" << '\n'
                << "Aliquam" << '\n'
                << "sollicitudin" << '\n'
                << "ipsum" << '\n'
                << "at" << '\n'
                << "dictum" << '\n'
                << "iaculis" << '\n'
                << "Integer" << '\n'
                << "tempus" << '\n'
                << "egestas" << '\n'
                << "vulputate" << '\n'
                << "Nam" << '\n'
                << "sit" << '\n'
                << "amet" << '\n'
                << "dictum" << '\n'
                << "ante" << '\n'
                << "Mauris" << '\n'
                << "quam" << '\n'
                << "quam" << '\n'
                << "vestibulum" << '\n'
                << "a" << '\n'
                << "lorem" << '\n'
                << "ut" << '\n'
                << "dignissim" << '\n'
                << "pretium" << '\n'
                << "est" << '\n'
                << "Pellentesque" << '\n'
                << "ut" << '\n'
                << "enim" << '\n'
                << "condimentum" << '\n'
                << "tristique" << '\n'
                << "nunc" << '\n'
                << "ut" << '\n'
                << "aliquet" << '\n'
                << "turpis" << '\n'
                << "Interdum" << '\n'
                << "et" << '\n'
                << "malesuada" << '\n'
                << "fames" << '\n'
                << "ac" << '\n'
                << "ante" << '\n'
                << "ipsum" << '\n'
                << "primis" << '\n'
                << "in" << '\n'
                << "faucibus" << '\n'
                << "Sed" << '\n'
                << "venenatis" << '\n'
                << "nibh" << '\n'
                << "neque" << '\n'
                << "nec" << '\n'
                << "fringilla" << '\n'
                << "lectus" << '\n'
                << "molestie" << '\n'
                << "at" << '\n'
                << "Nullam" << '\n'
                << "in" << '\n'
                << "metus" << '\n'
                << "ac" << '\n'
                << "mi" << '\n'
                << "volutpat" << '\n'
                << "facilisis" << '\n'
                << "eget" << '\n'
                << "vel" << '\n'
                << "felis" << '\n'
                << "Aenean" << '\n'
                << "eu" << '\n'
                << "lorem" << '\n'
                << "feugiat" << '\n'
                << "aliquet" << '\n'
                << "eros" << '\n'
                << "vitae" << '\n'
                << "sollicitudin" << '\n'
                << "nulla" << '\n'
                << "Donec" << '\n'
                << "dolor" << '\n'
                << "nibh" << '\n'
                << "bibendum" << '\n'
                << "in" << '\n'
                << "pretium" << '\n'
                << "et" << '\n'
                << "lobortis" << '\n'
                << "sit" << '\n'
                << "amet" << '\n'
                << "erat" << '\n'
                << "Integer" << '\n'
                << "accumsan" << '\n'
                << "ut" << '\n'
                << "nisi" << '\n'
                << "eu" << '\n'
                << "sagittis" << '\n'
                << "Mauris" << '\n'
                << "vitae" << '\n'
                << "interdum" << '\n'
                << "ligula" << '\n'
                << "Nullam" << '\n'
                << "quis" << '\n'
                << "ultrices" << '\n'
                << "arcu" << '\n'
                << "a" << '\n'
                << "rhoncus" << '\n'
                << "orci" << '\n'
                << "In" << '\n'
                << "velit" << '\n'
                << "nisl" << '\n'
                << "scelerisque" << '\n'
                << "nec" << '\n'
                << "ultricies" << '\n'
                << "sit" << '\n'
                << "amet" << '\n'
                << "pulvinar" << '\n'
                << "ut" << '\n'
                << "lorem" << '\n'
                << "Suspendisse" << '\n'
                << "sit" << '\n'
                << "amet" << '\n'
                << "varius" << '\n'
                << "libero" << '\n'
                << "vitae" << '\n'
                << "rutrum" << '\n'
                << "erat" << '\n'
                << "Integer" << '\n'
                << "lacus" << '\n'
                << "lorem" << '\n'
                << "vestibulum" << '\n'
                << "quis" << '\n'
                << "erat" << '\n'
                << "quis" << '\n'
                << "fermentum" << '\n'
                << "pellentesque" << '\n'
                << "enim" << '\n'
                << "Nam" << '\n'
                << "dolor" << '\n'
                << "turpis" << '\n'
                << "fringilla" << '\n'
                << "ac" << '\n'
                << "lectus" << '\n'
                << "in" << '\n'
                << "mollis" << '\n'
                << "tempor" << '\n'
                << "ipsum" << '\n'
                << "Integer" << '\n'
                << "in" << '\n'
                << "justo" << '\n'
                << "sit" << '\n'
                << "amet" << '\n'
                << "sapien" << '\n'
                << "bibendum" << '\n'
                << "convallis" << '\n'
                << "Suspendisse" << '\n'
                << "interdum" << '\n'
                << "ante" << '\n'
                << "eget" << '\n'
                << "aliquet" << '\n'
                << "congue" << '\n'
                << "elit" << '\n'
                << "nunc" << '\n'
                << "tincidunt" << '\n'
                << "tortor" << '\n'
                << "at" << '\n'
                << "consectetur" << '\n'
                << "sem" << '\n'
                << "magna" << '\n'
                << "vel" << '\n'
                << "ante" << '\n'
                << "Vivamus" << '\n'
                << "in" << '\n'
                << "diam" << '\n'
                << "lacus" << '\n'
                << "Pellentesque" << '\n'
                << "volutpat" << '\n'
                << "lacinia" << '\n'
                << "eros" << '\n'
                << "et" << '\n'
                << "convallis" << '\n'
                << "Suspendisse" << '\n'
                << "eget" << '\n'
                << "accumsan" << '\n'
                << "nisl" << '\n'
                << "Fusce" << '\n'
                << "viverra" << '\n'
                << "nisi" << '\n'
                << "elit" << '\n'
                << "sed" << '\n'
                << "venenatis" << '\n'
                << "elit" << '\n'
                << "vulputate" << '\n'
                << "nec" << '\n'
                << "Aenean" << '\n'
                << "tincidunt" << '\n'
                << "est" << '\n'
                << "a" << '\n'
                << "quam" << '\n'
                << "vestibulum" << '\n'
                << "ut" << '\n'
                << "maximus" << '\n'
                << "massa" << '\n'
                << "tristique" << '\n'
                << "Vestibulum" << '\n'
                << "ligula" << '\n'
                << "velit" << '\n'
                << "lobortis" << '\n'
                << "sed" << '\n'
                << "elit" << '\n'
                << "in" << '\n'
                << "facilisis" << '\n'
                << "blandit" << '\n'
                << "justo" << '\n'
                << "Nunc" << '\n'
                << "eget" << '\n'
                << "magna" << '\n'
                << "mattis" << '\n'
                << "consectetur" << '\n'
                << "sem" << '\n'
                << "id" << '\n'
                << "ultrices" << '\n'
                << "mauris" << '\n'
                << "Nulla" << '\n'
                << "porta" << '\n'
                << "consectetur" << '\n'
                << "mauris" << '\n'
                << "Aliquam" << '\n'
                << "non" << '\n'
                << "commodo" << '\n'
                << "metus" << '\n'
                << "in" << '\n'
                << "lacinia" << '\n'
                << "urna" << '\n'
                << "Proin" << '\n'
                << "sapien" << '\n'
                << "lorem" << '\n'
                << "auctor" << '\n'
                << "vitae" << '\n'
                << "maximus" << '\n'
                << "non" << '\n'
                << "elementum" << '\n'
                << "vitae" << '\n'
                << "quam" << '\n'
                << "Pellentesque" << '\n'
                << "eget" << '\n'
                << "felis" << '\n'
                << "vehicula" << '\n'
                << "imperdiet" << '\n'
                << "dolor" << '\n'
                << "quis" << '\n'
                << "sodales" << '\n'
                << "mi" << '\n'
                << "Etiam" << '\n'
                << "sodales" << '\n'
                << "placerat" << '\n'
                << "metus" << '\n'
                << "ac" << '\n'
                << "elementum" << '\n'
                << "risus" << '\n'
                << "finibus" << '\n'
                << "egestas" << '\n'
                << "In" << '\n'
                << "vitae" << '\n'
                << "lectus" << '\n'
                << "ligula" << '\n'
                << "Quisque" << '\n'
                << "fringilla" << '\n'
                << "porta" << '\n'
                << "efficitur" << '\n'
                << "Nullam" << '\n'
                << "a" << '\n'
                << "malesuada" << '\n'
                << "diam" << '\n'
                << "Praesent" << '\n'
                << "viverra" << '\n'
                << "porta" << '\n'
                << "augue" << '\n'
                << "sagittis" << '\n'
                << "convallis" << '\n'
                << "Praesent" << '\n'
                << "laoreet" << '\n'
                << "mauris" << '\n'
                << "quis" << '\n'
                << "gravida" << '\n'
                << "fermentum" << '\n'
                << "nisl" << '\n'
                << "sem" << '\n'
                << "molestie" << '\n'
                << "lorem" << '\n'
                << "vel" << '\n'
                << "iaculis" << '\n'
                << "magna" << '\n'
                << "quam" << '\n'
                << "in" << '\n'
                << "nisl" << '\n'
                << "Ut" << '\n'
                << "pulvinar" << '\n'
                << "erat" << '\n'
                << "ut" << '\n'
                << "cursus" << '\n'
                << "sagittis" << '\n'
                << "Nunc" << '\n'
                << "at" << '\n'
                << "dui" << '\n'
                << "at" << '\n'
                << "metus" << '\n'
                << "rhoncus" << '\n'
                << "ullamcorper" << '\n'


            ;
    }

}

[Blaster]

@VRonin
Let's see, I use what you tell me about setCompletionPrefix (), but on any side it raises the popup.
What I do is that I connect a signal that passes the prefix and a slot that look like this:

void MineTextEdit::completeWord(QString cad)
{
    if(cad.size() > 3)
        {
            this->setFocus();
            c->setCompletionPrefix(cad);
            QRect cr = cursorRect();
            cr.setWidth(c->popup()->sizeHintForColumn(0)
                        + c->popup()->verticalScrollBar()->sizeHint().width());
            c->complete(cr);
        }
}