selectionChanged is not called when text is selected in a QWebView C#

Question

I'm having a QWebView in my windows that contains text. I want the selected word (or words it doesn't matter) to be written somewhere else, but the signal selectionChanged is never called. Do I need to set something before? For now, all I have is a slot waiting be called...I don't even do something for now because the signal is never sent

thanks!

#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent)
{
    this->setupUi();
    connect(m_WebView, SIGNAL(selectionChanged()), this, SLOT(newSelection()));
}

MainWindow::~MainWindow()
{
}

void MainWindow::setupUi()
{
    m_WebView = new QWebView();
    m_LineEdit = new QLineEdit();

    QVBoxLayout* lay = new QVBoxLayout();

    lay->addWidget(m_LineEdit);
    lay->addWidget(m_WebView);

    QWidget* wid = new QWidget(this);
    wid->setLayout(lay);

    setCentralWidget(wid);
}

void MainWindow::newSelection()
{
    m_LineEdit->setText(m_WebView->selectedText());
}

Answer 1

I'm not sure why the example you gave didn't work. This works (and it is because I am connection to the page not the view). I'd actually consider filing a bug report with the devs if I were you. From the docs, it seems like this SHOULD work.

cpp:

    #include "mainwindow.h"
    #include <QWebView>
    #include <QLineEdit>
    #include <QVBoxLayout>
    #include <QTimer>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent)
{
    this->setupUi();
    connect(m_WebView->page(), SIGNAL(selectionChanged()), this, SLOT(newSelection()));
}

MainWindow::~MainWindow()
{
}

void MainWindow::setupUi()
{
    m_WebView = new QWebView();
    m_WebView->load(QUrl("http://qt.nokia.com/"));
    m_WebView->show();
    m_LineEdit = new QLineEdit();

    QVBoxLayout* lay = new QVBoxLayout();

    lay->addWidget(m_LineEdit);
    lay->addWidget(m_WebView);


    QWidget* wid = new QWidget(this);
    wid->setLayout(lay);

    setCentralWidget(wid);
}

void MainWindow::newSelection()
{
    m_LineEdit->setText(m_WebView->selectedText());
}

h:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
    class MainWindow;
}

class QWebView;
class QLineEdit;
class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

    void setupUi();

  protected slots:
    void newSelection();
private:
    Ui::MainWindow *ui;
    QWebView * m_WebView;
    QLineEdit * m_LineEdit;
};

#endif // MAINWINDOW_H