Réglage de mise au point sur QLineEdit tout en montrant la vue QListView

Question

Dans Qt, il y a une classe QCompleter qui fournit funtionanity automatique complet. Je veux utiliser QListView pour terminer la même chose. Dans le code suivant, Lorsque le QListView montre, QLineEdit va perdre le focus. Comment pourrais-je garder l'accent QLineEdit?

1) mdict.h :

#include <QtGui/QWidget>

class QLineEdit;
class QListView;
class QModelIndex;

class mdict : public QWidget
{
    Q_OBJECT

public:
    mdict(QWidget *parent = 0);
    ~mdict() {}

private slots:
    void on_textChanged(const QString &);
    void completeText(const QModelIndex &);

private:
    QLineEdit *mLineEdit;
    QListView *mView;
};

2) mdict.cpp

#include <cassert>
#include <QtGui>
#include "mdict.h"

mdict::mdict(QWidget *parent) : QWidget(parent), mLineEdit(0), mView(0)
{
    mLineEdit = new QLineEdit(this);

    QVBoxLayout *layout = new QVBoxLayout(this);
    layout->addWidget(mLineEdit);
    layout->addStretch(100);
    setLayout(layout);

    QStringList stringList;
    stringList << "m0" << "m1" << "m2";
    QStringListModel *model = new QStringListModel(stringList);
    mView = new QListView(this);
    mView->setModel(model);
    mView->setEditTriggers(QAbstractItemView::NoEditTriggers);
    mView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    mView->setSelectionBehavior(QAbstractItemView::SelectRows);
    mView->setSelectionMode(QAbstractItemView::SingleSelection);
    mView->setParent(0, Qt::Popup);
    mView->setFocusPolicy(Qt::NoFocus);
    mView->setFocusProxy(mLineEdit);

    connect(mLineEdit, SIGNAL(textChanged(const QString&)), 
        this, SLOT(on_textChanged(const QString &)));
    connect(mView, SIGNAL(activated(const QModelIndex &)),
        this, SLOT(completeText(const QModelIndex &)));
    connect(mView, SIGNAL(clicked(const QModelIndex &)),
        this, SLOT(completeText(const QModelIndex &)));
}

void mdict::on_textChanged(const QString &text)
{
    int lineEidtWidth = mLineEdit->width();
    mView->setMinimumWidth(lineEidtWidth);
    mView->setMaximumWidth(lineEidtWidth);
    mView->setMaximumHeight(60);

    QPoint p(0, mLineEdit->height());
    int x = mLineEdit->mapToGlobal(p).x();
    int y = mLineEdit->mapToGlobal(p).y();
    mView->move(x, y);
    mView->show();
}

void mdict::completeText(const QModelIndex &index)
{
    mLineEdit->setText(index.data().toString());
    mView->hide();
}

3) main.cpp

#include "mdict.h"

#include <QtGui>
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    mdict w;
    w.show();
    return a.exec();
}

Answer 1

Utilisez Qt::ToolTip au lieu de Qt::Popup, de cette façon:

mView->setParent(0, Qt::ToolTip);