how to make widget (createWindowContainer) fill parent widget

[Jian]

I have this problem for months. I try to implement a webview on iOS with QtWebView by Qml and embed the webview into a widget by QWidget::createWindowContainer (following a online tutorial). But I just can't get this widget to fill the parent widget, nor change its size at all.

I have write the following minimal example for explaining the problem:

main.cpp

#include <QApplication>
#include <QQuickView>
#include <QBoxLayout>
#include <QWidget>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QWidget *mainwindow = new QWidget();
    mainwindow->setStyleSheet("background-color:red;"); // so that we can see the problem more clearly

    QHBoxLayout *layout = new QHBoxLayout(mainwindow);

    QQuickView *view = new QQuickView();
    QWidget* container = QWidget::createWindowContainer(view, mainwindow);
    // container->setMinimumSize(200, 200);
    // container->setMaximumSize(200, 200); // the displaying size doesn't change with or without these lines
    // container->setFocusPolicy(Qt::TabFocus);
    view->setSource(QUrl("qrc:///webview.qml"));

    layout->addWidget(container);
    mainwindow->setLayout(layout);

    mainwindow->show();

    return a.exec();
}

webview.qml

import QtQuick 2.2
import QtWebView 1.0

Item {
    visible: true
    anchors.fill: parent
    WebView {
        anchors.fill: parent
        url: "https://www.google.de"
    }
}

When I run this mini program on iphonesimulator in QtCreator, the layout is like the following screenshots: We can see the container doesn't fill the top area. And even when the parent widget is much smaller (in my actual program), the container has always this same size. When I rotate the iphonesimulator, it looks then like this!.

Could anyone please help to solve this? It's annoying me for months. Thanks!

[mvuori]

You seem to try setting limits to the size, but for setting the size you need to use serGeometry(), setWidth() etc... according to what the mainwindow size is.

[Jian]

@mvuori those lines with size setting are commented. I have on Android tested, everything works and I can also change the size of container. Is this a bug on iOS?

[JKSH]

Have you tried QQuickWidget? It has now replaced QWidget::createWindowContainer().

[Jian]

@JKSH WOW!!! With QQuickWidget is the layout perfect! Thanks! But the webview remains now white and no page (google homepage) ist displayed. Do you know why?

[Jian]

@JKSH
For example, with following code and the same webview.qml previously, I get only white screen.

QQuickWidget *view = new QQuickWidget();
view->setSource(QUrl("qrc:/webview.qml"));
view->show();

[JKSH]

@Jian said:

But the webview remains now white and no page (google homepage) ist displayed. Do you know why?

I'm not sure, sorry. I have never used Qt WebView myself.

If you still can't find the answer, maybe you can subscribe to the Interest Mailing List and ask there: http://lists.qt-project.org/mailman/listinfo/interest -- Qt engineers are active in that list.