Webview is not loading any page

Qjay · wrote on 9 Jul 2016, 14:24

I am doing a test to load a webpage in my app to see how it will look . I am using webview ( import webview 1.0 ) in qml

system : linux 64-bit , qt 5.7.0 offline version

below is my code :

pro file

TEMPLATE = app
TARGET = gallery
QT += quick quickcontrols2
QT += qml  webview

SOURCES += \
    gallery.cpp

OTHER_FILES += \
    gallery.qml \
    pages/*.qml

RESOURCES += \
    gallery.qrc

qml file

import QtQuick 2.6
import QtQuick.Layouts 1.3
import QtQuick.Controls 2.0
import QtQuick.Controls.Material 2.0
import QtQuick.Controls.Universal 2.0
import Qt.labs.settings 1.0
import QtWebView 1.0


ApplicationWindow {
    id: window
    width: 360
    height: 520
    visible: true
    title: "WikiToLearn"


    Settings {
        id: settings
        property string style: "Material"
    }

    header: ToolBar {
        Material.foreground: "white"


        RowLayout {
            spacing: 20
            anchors.fill: parent

            ToolButton {
                contentItem: Image {
                    fillMode: Image.Pad
                    horizontalAlignment: Image.AlignHCenter
                    verticalAlignment: Image.AlignVCenter
                    source: "qrc:/images/drawer.png"
                }
                onClicked: drawer.open()
            }

            Label {
                id: titleLabel
                text: "WikiToLearn"
                font.pixelSize: 20
                elide: Label.ElideRight
                horizontalAlignment: Qt.AlignHCenter
                verticalAlignment: Qt.AlignVCenter
                Layout.fillWidth: true
            }

            ToolButton {
                contentItem: Image {
                    fillMode: Image.Pad
                    horizontalAlignment: Image.AlignHCenter
                    verticalAlignment: Image.AlignVCenter
                    source: "qrc:/images/menu.png"
                }
                onClicked: optionsMenu.open()

                Menu {
                    id: optionsMenu
                    x: parent.width - width
                    transformOrigin: Menu.TopRight

                    MenuItem {
                        text: "Settings"
                        onTriggered: settingsPopup.open()
                    }
                    MenuItem {
                        text: "About"
                        onTriggered: aboutDialog.open()
                    }
                }
            }
        }
    }

    Drawer {
    id: drawer
    width: Math.min(window.width, window.height) / 3 * 2
    height: window.height

    ColumnLayout {
        anchors.fill: parent
        Rectangle {
            width: drawer.width
            height: 50

            TextField{
                id: search_text
                placeholderText: " Search WikiToLearn"
                width: drawer.width

                Image {
                    id: search_button
                    anchors.right: search_text.Right
                    source: "qrc:/images/search.png"
                    MouseArea{
                        anchors.fill: search_button
                        onClicked: console.log(search_text.text);

                    }
                }

            }
        }

        ListView {
            id: listView
            currentIndex: -1
            Layout.fillWidth: true
            Layout.fillHeight: true

            delegate: ItemDelegate {
                width: parent.width
                text: model.title
                highlighted: ListView.isCurrentItem
                onClicked: {
                    if (listView.currentIndex != index) {
                        listView.currentIndex = index
                        titleLabel.text = model.title
                        stackView.replace(model.source)
                    }
                    drawer.close()
                }
            }

            model: ListModel {
                ListElement { title: "Get New Pages"; source: "qrc:/pages/get_new_pages.qml" }
                ListElement { title: "Manage Pages"; source: "qrc:/pages/manage_pages.qml" }


            }

            ScrollIndicator.vertical: ScrollIndicator { }
        }
    }

}
    StackView {
        id: stackView
        anchors.fill: parent

        initialItem: Pane {
            id: pane
/*
            Image {
                id: logo
                width: pane.availableWidth / 2
                height: pane.availableHeight / 2
                anchors.centerIn: parent
                anchors.verticalCenterOffset: -50
                fillMode: Image.PreserveAspectFit
                source: "qrc:/images/wtl-logo.png"
            }

            Label {
                text: "WikiToLearn wants to provide free, collaborative and accessible text books to the whole world \“knowledge only grows if shared\""
                anchors.margins: 20
                anchors.top: logo.bottom
                anchors.left: parent.left
                anchors.right: parent.right
                horizontalAlignment: Label.AlignHCenter
                verticalAlignment: Label.AlignVCenter
                wrapMode: Label.Wrap
            }
*/
              WebView{
                  id:webview
                  anchors.fill: parent
                  url: "www.google.com"
              }

        }
    }

    Popup {
        id: settingsPopup
        x: (window.width - width) / 2
        y: window.height / 6
        width: Math.min(window.width, window.height) / 3 * 2
        height: settingsColumn.implicitHeight + topPadding + bottomPadding
        modal: true
        focus: true

        contentItem: ColumnLayout {
            id: settingsColumn
            spacing: 20

            Label {
                text: "Settings"
                font.bold: true
            }

            RowLayout {
                spacing: 10

                Label {
                    text: "Style:"
                }

                ComboBox {
                    id: styleBox
                    property int styleIndex: -1
                    model: ["Default", "Material", "Universal"]
                    Component.onCompleted: {
                        styleIndex = find(settings.style, Qt.MatchFixedString)
                        if (styleIndex !== -1)
                            currentIndex = styleIndex
                    }
                    Layout.fillWidth: true
                }
            }

            Label {
                text: "Restart required"
                color: "#e41e25"
                opacity: styleBox.currentIndex !== styleBox.styleIndex ? 1.0 : 0.0
                horizontalAlignment: Label.AlignHCenter
                verticalAlignment: Label.AlignVCenter
                Layout.fillWidth: true
                Layout.fillHeight: true
            }

            RowLayout {
                spacing: 10

                Button {
                    id: okButton
                    text: "Ok"
                    onClicked: {
                        settings.style = styleBox.displayText
                        settingsPopup.close()
                    }

                    Material.foreground: Material.primary
                    Material.background: "transparent"
                    Material.elevation: 0

                    Layout.preferredWidth: 0
                    Layout.fillWidth: true
                }

                Button {
                    id: cancelButton
                    text: "Cancel"
                    onClicked: {
                        styleBox.currentIndex = styleBox.styleIndex
                        settingsPopup.close()
                    }

                    Material.background: "transparent"
                    Material.elevation: 0

                    Layout.preferredWidth: 0
                    Layout.fillWidth: true
                }
            }
        }
    }

    Popup {
        id: aboutDialog
        modal: true
        focus: true
        x: (window.width - width) / 2
        y: window.height / 6
        width: Math.min(window.width, window.height) / 3 * 2
        contentHeight: aboutColumn.height

        Column {
            id: aboutColumn
            spacing: 20

            Label {
                text: "About"
                font.bold: true
            }

            Label {
                width: aboutDialog.availableWidth
                text: "WikiToLearn wants to provide free, collaborative and accessible text books to the whole world.
Our philosophy is synthetized in the sentence: “knowledge only grows if shared”"
                wrapMode: Label.Wrap
                font.pixelSize: 12
            }

            Label {
                width: aboutDialog.availableWidth
                text: "We provide a platform where learners and teachers can together complete,"
                    + "refine and re-assemble notes, lecture notes in order to create text books, "
                    + "tailored precisely to their needs, so that you can “stand on the shoulders of giants”"
                wrapMode: Label.Wrap
                font.pixelSize: 12
            }
        }
    }
}

C++ file

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>
#include <QSettings>
#include <QQuickStyle>
#include <QtWebView/QtWebView>

int main(int argc, char *argv[])
{
    QGuiApplication::setApplicationName("WikiToLearn");
    QGuiApplication::setOrganizationName("en.wikitolearn.org");
    QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

    QGuiApplication app(argc, argv);

    QtWebView::initialize();

    QSettings settings;
    QString style = QQuickStyle::name();
    if (!style.isEmpty())
        settings.setValue("style", style);
    else
        QQuickStyle::setStyle(settings.value("style").toString());

    QQmlApplicationEngine engine;
    engine.load(QUrl("qrc:/gallery.qml"));
    if (engine.rootObjects().isEmpty())
        return -1;

    return app.exec();
}

? Offline · wrote on 9 Jul 2016, 14:34

Hi! Are you sure the pane's size is bigger than 0,0? I'd add anchors.fill:parent to pane and see if that helps.

Qjay · wrote on 9 Jul 2016, 15:20

Hey i tried , what you suggested but still all i see white blank box

screenshot
https://s32.postimg.org/3ny4vsr4l/image.png

change i made in code :

 StackView {
        id: stackView
        anchors.fill: parent

        initialItem: Pane {
            id: pane
            anchors.fill: parent

              WebView{
                  id:webview
                  anchors.fill: parent
                  url: "www.google.com"
              }

        }
    }

? Offline · wrote on 9 Jul 2016, 16:09

Hi, found the problem. Looks as if the initially provided url doesn't trigger the page to load. It only works on setting the property at runtime. For a very subtile way to do that see the Minibrowser Example. As a workaround I suggest the following:

WebView{
  id:webview
  anchors.fill: parent
  Component.onCompleted: url =  "http://qt.io"
}

Qjay · 9 Jul 2016, 16:21

@Wieland said:

WebView{
id:webview
anchors.fill: parent
Component.onCompleted: url = "http://qt.io"
}

It worked . Thanks a lot !!

? Offline · Q Qjay 9 Jul 2016, 16:15

Reported it as QTBUG-54668. Vote for the bug to get it fixed sooner :-)

Qjay · wrote on 10 Jul 2016, 14:38

Okay !! sure