It seems the view becomes useless after the page is rendered in the extern browser. You might just schedule the ExternalWebView for deletetion with deleteLater():
#include <iostream>
#include <QApplication>
#include <QGridLayout>
#include <QNetworkRequest>
#include <QDesktopServices>
#include <QEvent>
#include <QMainWindow>
#include <QWebView>
class ExternWebPage : public QWebPage {
//Q_OBJECT
public:
ExternWebPage(QObject* parent = 0)
: QWebPage(parent)
{
std::cout << "ExternWebPage" << std::endl;
}
~ExternWebPage() {
std::cout << "Destroy ExternWebPage" << std::endl;
}
virtual bool event(QEvent *e) {
static unsigned counter;
std::cout << ++counter << " ExternWebPage: " << e->type() << std::endl;
return QWebPage::event(e);
}
bool acceptNavigationRequest(QWebFrame *, const QNetworkRequest &request, NavigationType) {
QDesktopServices::openUrl(request.url());
return false;
}
};
class ExternWebView : public QWebView {
//Q_OBJECT
public:
ExternWebView(QWidget* parent = 0)
: QWebView(parent)
{
std::cout << "ExternWebView" << std::endl;
}
~ExternWebView() { std::cout << "Destroy ExternWebView" << std::endl; }
virtual bool event(QEvent *e) {
static unsigned counter;
std::cout << ++counter << " ExternWebView: " << e->type() << std::endl;
return QWebView::event(e);
}
};
class InternalWebView : public QWebView {
//Q_OBJECT
public:
InternalWebView(QWidget* parent = 0)
: QWebView(parent)
{}
QWebView* createWindow(QWebPage::WebWindowType) {
auto res = new ExternWebView();
res->setPage(new ExternWebPage(res));
res->deleteLater();
return res;
}
};
class Window : public QMainWindow {
//Q_OBJECT
public:
Window()
: QMainWindow()
{
std::cout << "Window" << std::endl;
auto web = new InternalWebView(this);
web->setHtml("<div align=\"center\"><a href=\"http://www.google.com/\">Same Window</a> <a href=\"http://www.google.com/\" target=\"_blank\">New Window</a></div>");
setCentralWidget(web);
}
~Window() { std::cout << "Destroy Window" << std::endl; }
};
int main(int argc, char *argv[]) {
QApplication a(argc, argv);
Window w;
w.show();
return a.exec();
}
Test without deletion:
Window
ExternWebView
1 ExternWebView: 68
ExternWebPage
2 ExternWebView: 74
3 ExternWebView: 75
1 ExternWebPage: 43
2 ExternWebPage: 43
3 ExternWebPage: 43
4 ExternWebPage: 43
5 ExternWebPage: 43
Destroy Window
Test with delete later:
ExternWebView
1 ExternWebView: 68
ExternWebPage
2 ExternWebView: 74
3 ExternWebView: 75
4 ExternWebView: 52
Destroy ExternWebView
Destroy ExternWebPage
Destroy Window