QWebEnginePage Class

The QWebEnginePage class provides an object to view and edit web documents. More...

Header: #include <QWebEnginePage>
CMake: find_package(Qt6 REQUIRED COMPONENTS WebEngineCore)
target_link_libraries(mytarget PRIVATE Qt6::WebEngineCore)
qmake: QT += webenginecore
Inherits: QObject

Public Types

enum FileSelectionMode { FileSelectOpen, FileSelectOpenMultiple, FileSelectUploadFolder, FileSelectSave }
enum FindFlag { FindBackward, FindCaseSensitively }
flags FindFlags
enum JavaScriptConsoleMessageLevel { InfoMessageLevel, WarningMessageLevel, ErrorMessageLevel }
enum class LifecycleState { Active, Frozen, Discarded }
enum NavigationType { NavigationTypeLinkClicked, NavigationTypeTyped, NavigationTypeFormSubmitted, NavigationTypeBackForward, NavigationTypeReload, …, NavigationTypeOther }
enum RenderProcessTerminationStatus { NormalTerminationStatus, AbnormalTerminationStatus, CrashedTerminationStatus, KilledTerminationStatus }
enum WebAction { NoWebAction, Back, Forward, Stop, Reload, …, ChangeTextDirectionRTL }
enum WebWindowType { WebBrowserWindow, WebBrowserTab, WebDialog, WebBrowserBackgroundTab }

Properties

Public Functions

QWebEnginePage(QObject *parent = nullptr)
QWebEnginePage(QWebEngineProfile *profile, QObject *parent = nullptr)
virtual ~QWebEnginePage()
QAction *action(QWebEnginePage::WebAction action) const
QColor backgroundColor() const
QSizeF contentsSize() const
(since 6.6) QString devToolsId() const
QWebEnginePage *devToolsPage() const
void download(const QUrl &url, const QString &filename = QString())
(since 6.8) std::optional<QWebEngineFrame> findFrameByName(const QString &name)
void findText(const QString &subString, QWebEnginePage::FindFlags options = {}, const std::function<void (const QWebEngineFindTextResult &)> &resultCallback = std::function<void(const QWebEngineFindTextResult &)>())
bool hasSelection() const
QWebEngineHistory *history() const
QIcon icon() const
QUrl iconUrl() const
QWebEnginePage *inspectedPage() const
bool isAudioMuted() const
bool isLoading() const
bool isVisible() const
QWebEnginePage::LifecycleState lifecycleState() const
void load(const QUrl &url)
void load(const QWebEngineHttpRequest &request)
(since 6.8) QWebEngineFrame mainFrame()
void printToPdf(const QString &filePath, const QPageLayout &layout = QPageLayout(QPageSize(QPageSize::A4), QPageLayout::Portrait, QMarginsF()), const QPageRanges &ranges = {})
void printToPdf(const std::function<void (const QByteArray &)> &resultCallback, const QPageLayout &layout = QPageLayout(QPageSize(QPageSize::A4), QPageLayout::Portrait, QMarginsF()), const QPageRanges &ranges = {})
QWebEngineProfile *profile() const
bool recentlyAudible() const
QWebEnginePage::LifecycleState recommendedState() const
qint64 renderProcessPid() const
void replaceMisspelledWord(const QString &replacement)
QUrl requestedUrl() const
void runJavaScript(const QString &scriptSource, const std::function<void (const QVariant &)> &resultCallback)
void runJavaScript(const QString &scriptSource, quint32 worldId = 0, const std::function<void (const QVariant &)> &resultCallback = {})
void save(const QString &filePath, QWebEngineDownloadRequest::SavePageFormat format = QWebEngineDownloadRequest::MimeHtmlSaveFormat) const
QWebEngineScriptCollection &scripts()
QPointF scrollPosition() const
QString selectedText() const
void setAudioMuted(bool muted)
void setBackgroundColor(const QColor &color)
void setContent(const QByteArray &data, const QString &mimeType = QString(), const QUrl &baseUrl = QUrl())
void setDevToolsPage(QWebEnginePage *devToolsPage)
void setHtml(const QString &html, const QUrl &baseUrl = QUrl())
void setInspectedPage(QWebEnginePage *page)
void setLifecycleState(QWebEnginePage::LifecycleState state)
void setUrl(const QUrl &url)
void setUrlRequestInterceptor(QWebEngineUrlRequestInterceptor *interceptor)
void setVisible(bool visible)
void setWebChannel(QWebChannel *channel, quint32 worldId = 0)
void setZoomFactor(qreal factor)
QWebEngineSettings *settings() const
QString title() const
void toHtml(const std::function<void (const QString &)> &resultCallback) const
void toPlainText(const std::function<void (const QString &)> &resultCallback) const
virtual void triggerAction(QWebEnginePage::WebAction action, bool checked = false)
QUrl url() const
QWebChannel *webChannel() const
qreal zoomFactor() const

Reimplemented Public Functions

virtual bool event(QEvent *e) override

Signals

void audioMutedChanged(bool muted)
void authenticationRequired(const QUrl &requestUrl, QAuthenticator *authenticator)
void certificateError(const QWebEngineCertificateError &certificateError)
void contentsSizeChanged(const QSizeF &size)
(since 6.4) void fileSystemAccessRequested(QWebEngineFileSystemAccessRequest request)
void findTextFinished(const QWebEngineFindTextResult &result)
void fullScreenRequested(QWebEngineFullScreenRequest fullScreenRequest)
void geometryChangeRequested(const QRect &geom)
void iconChanged(const QIcon &icon)
void iconUrlChanged(const QUrl &url)
void lifecycleStateChanged(QWebEnginePage::LifecycleState state)
void linkHovered(const QString &url)
void loadFinished(bool ok)
void loadProgress(int progress)
void loadStarted()
(since 6.2) void loadingChanged(const QWebEngineLoadingInfo &loadingInfo)
(since 6.2) void navigationRequested(QWebEngineNavigationRequest &request)
(since 6.2) void newWindowRequested(QWebEngineNewWindowRequest &request)
void pdfPrintingFinished(const QString &filePath, bool success)
(since 6.8) void permissionRequested(QWebEnginePermission permission)
void printRequested()
(since 6.8) void printRequestedByFrame(QWebEngineFrame frame)
void proxyAuthenticationRequired(const QUrl &requestUrl, QAuthenticator *authenticator, const QString &proxyHost)
void recentlyAudibleChanged(bool recentlyAudible)
void recommendedStateChanged(QWebEnginePage::LifecycleState state)
void registerProtocolHandlerRequested(QWebEngineRegisterProtocolHandlerRequest request)
void renderProcessPidChanged(qint64 pid)
void renderProcessTerminated(QWebEnginePage::RenderProcessTerminationStatus terminationStatus, int exitCode)
void scrollPositionChanged(const QPointF &position)
void selectClientCertificate(QWebEngineClientCertificateSelection clientCertificateSelection)
void selectionChanged()
void titleChanged(const QString &title)
void urlChanged(const QUrl &url)
void visibleChanged(bool visible)
(since 6.7) void webAuthUxRequested(QWebEngineWebAuthUxRequest *request)
void windowCloseRequested()
(since 6.8) void zoomFactorChanged(qreal factor)

Protected Functions

virtual bool acceptNavigationRequest(const QUrl &url, QWebEnginePage::NavigationType type, bool isMainFrame)
virtual QStringList chooseFiles(QWebEnginePage::FileSelectionMode mode, const QStringList &oldFiles, const QStringList &acceptedMimeTypes)
virtual QWebEnginePage *createWindow(QWebEnginePage::WebWindowType type)
virtual void javaScriptAlert(const QUrl &securityOrigin, const QString &msg)
virtual bool javaScriptConfirm(const QUrl &securityOrigin, const QString &msg)
virtual void javaScriptConsoleMessage(QWebEnginePage::JavaScriptConsoleMessageLevel level, const QString &message, int lineNumber, const QString &sourceID)
virtual bool javaScriptPrompt(const QUrl &securityOrigin, const QString &msg, const QString &defaultValue, QString *result)

Detailed Description

A web engine page holds the contents of an HTML document, the history of navigated links, and actions.

QWebEnginePage's API is very similar to QWebEngineView, as you are still provided with common functions like action() (known as pageAction() in QWebEngineView), triggerAction(), and findText().

A page can be loaded using load() or setUrl(). Alternatively, if you have the HTML content readily available, you can use setHtml(). The GET method is always used to load URLs.

The QWebEnginePage class also offers methods to retrieve both the URL currently loaded by the page (see url()) as well as the URL originally requested to be loaded (see requestedUrl()). These methods make possible the retrieval of the URL before and after a DNS resolution or a redirection occurs during the load process. The requestedUrl() also matches to the URL added to the page history (QWebEngineHistory) if load is successful.

The title of an HTML page can be accessed with the title() property. Additionally, a page may also specify an icon, which can be accessed using the icon() or its URL using the iconUrl() property. If the title or the icon changes, the corresponding titleChanged(), iconChanged() and iconUrlChanged() signals will be emitted. The zoomFactor() property enables zooming the contents of the web page by a scale factor.

The loadStarted() signal is emitted when the page begins to load, whereas the loadProgress() signal is emitted whenever an element of the web page completes loading, such as an embedded image or a script. The loadFinished() signal is emitted when the page contents have been loaded completely, independent of script execution or page rendering. Its argument, either true or false, indicates whether or not the load operation succeeded.

An HTML document is loaded in a main frame within the web page. If it references child frames (as defined by the <frame> or <iframe> elements), they are considered part of the content. Child frames are individually accessible only through JavaScript.

Web sites define security origin for safely accessing each other's resources for client-side scripting or databases. An origin consist of a host name, a scheme, and a port number. For example, the sites http://www.example.com/my/page.html and http://www.example.com/my/overview.html are allowed to share the same database or access each other's documents when used in HTML frame sets and JavaScript. At the same time, http://www.malicious.com/evil.html is prevented from accessing the resources of http://www.example.com/, because they are of a different security origin. By default, local schemes like file:// and qrc:// are considered to be in the same security origin, and can access each other's resources. Local resources are by default restricted from accessing remote content, which means that file:// will not be able to access http://domain.com/foo.html.

Scripts can be executed on the web page by using runJavaScript(), either in the main JavaScript world, along with the rest of the JavaScript coming from the web contents, or in their own isolated world. While the DOM of the page can be accessed from any world, JavaScript variables of a function defined in one world are not accessible from a different one. QWebEngineScript::ScriptWorldId provides some predefined IDs for this purpose. Using the runJavaScript() version without the world ID is the same as running the script in the MainWorld.

The FocusOnNavigationEnabled setting can be used to make the view associated with the page automatically receive focus when a navigation operation occurs (like loading or reloading a page or navigating through history).

Member Type Documentation

enum QWebEnginePage::FileSelectionMode

This enum indicates whether the implementation of the chooseFiles() function should return only one file or may return multiple files:

ConstantValueDescription
QWebEnginePage::FileSelectOpen0Return only one file name.
QWebEnginePage::FileSelectOpenMultiple1Return multiple file names.
QWebEnginePage::FileSelectUploadFolder2Allows users to specify a single existing folder for upload.
QWebEnginePage::FileSelectSave3Specify a new file to be created.

See also chooseFiles().

enum QWebEnginePage::FindFlag
flags QWebEnginePage::FindFlags

This enum describes the options available to the findText() function. The options can be OR-ed together from the following list:

ConstantValueDescription
QWebEnginePage::FindBackward1Searches backwards instead of forwards.
QWebEnginePage::FindCaseSensitively2By default findText() works case insensitive. Specifying this option changes the behavior to a case sensitive find operation.

The FindFlags type is a typedef for QFlags<FindFlag>. It stores an OR combination of FindFlag values.

enum QWebEnginePage::JavaScriptConsoleMessageLevel

This enum describes the different severity levels a JavaScript console message can have:

ConstantValueDescription
QWebEnginePage::InfoMessageLevel0The message is purely informative and can safely be ignored.
QWebEnginePage::WarningMessageLevel1The message informs about unexpected behavior or errors that may need attention.
QWebEnginePage::ErrorMessageLevel2The message indicates there has been an error.

enum class QWebEnginePage::LifecycleState

This enum describes the lifecycle state of the page:

ConstantValueDescription
QWebEnginePage::LifecycleState::Active0Normal state.
QWebEnginePage::LifecycleState::Frozen1Low CPU usage state where most HTML task sources are suspended.
QWebEnginePage::LifecycleState::Discarded2Very low resource usage state where the entire browsing context is discarded.

See also lifecycleState, Page Lifecycle API, and WebEngine Lifecycle Example.

This enum describes the type of a navigation request:

ConstantValueDescription
QWebEnginePage::NavigationTypeLinkClicked0The navigation request resulted from a clicked link.
QWebEnginePage::NavigationTypeTyped1The navigation request resulted from an explicitly loaded URL.
QWebEnginePage::NavigationTypeFormSubmitted2The navigation request resulted from a form submission.
QWebEnginePage::NavigationTypeBackForward3The navigation request resulted from a back or forward action.
QWebEnginePage::NavigationTypeReload4The navigation request resulted from a reload action.
QWebEnginePage::NavigationTypeRedirect (since Qt 5.14)6The navigation request resulted from a content or server controlled redirect. This also includes automatic reloads.
QWebEnginePage::NavigationTypeOther5The navigation request was triggered by other means not covered by the above.

See also acceptNavigationRequest().

enum QWebEnginePage::RenderProcessTerminationStatus

This enum describes the status with which the render process terminated:

ConstantValueDescription
QWebEnginePage::NormalTerminationStatus0The render process terminated normally.
QWebEnginePage::AbnormalTerminationStatus1The render process terminated with with a non-zero exit status.
QWebEnginePage::CrashedTerminationStatus2The render process crashed, for example because of a segmentation fault.
QWebEnginePage::KilledTerminationStatus3The render process was killed, for example by SIGKILL or task manager kill.

enum QWebEnginePage::WebAction

This enum describes the types of action which can be performed on the web page.

Actions only have an effect when they are applicable.

The availability of actions can be be determined by checking isEnabled() on the action returned by action().

ConstantValueDescription
QWebEnginePage::NoWebAction- 1No action is triggered.
QWebEnginePage::Back0Navigate back in the history of navigated links.
QWebEnginePage::Forward1Navigate forward in the history of navigated links.
QWebEnginePage::Stop2Stop loading the current page.
QWebEnginePage::Reload3Reload the current page.
QWebEnginePage::ReloadAndBypassCache10Reload the current page, but do not use any local cache.
QWebEnginePage::Cut4Cut the content currently selected into the clipboard.
QWebEnginePage::Copy5Copy the content currently selected into the clipboard.
QWebEnginePage::Paste6Paste content from the clipboard.
QWebEnginePage::Undo7Undo the last editing action.
QWebEnginePage::Redo8Redo the last editing action.
QWebEnginePage::SelectAll9Select all content. This action is only enabled when the page's content is focused. The focus can be forced by the JavaScript window.focus() call, or the FocusOnNavigationEnabled setting should be enabled to get automatic focus.
QWebEnginePage::PasteAndMatchStyle11Paste content from the clipboard with current style.
QWebEnginePage::OpenLinkInThisWindow (since Qt 5.6)12Open the current link in the current window.
QWebEnginePage::OpenLinkInNewWindow (since Qt 5.6)13Open the current link in a new window. Requires implementation of createWindow() or newWindowRequested().
QWebEnginePage::OpenLinkInNewTab (since Qt 5.6)14Open the current link in a new tab. Requires implementation of createWindow() or newWindowRequested().
QWebEnginePage::OpenLinkInNewBackgroundTab (since Qt 5.7)31Open the current link in a new background tab. Requires implementation of createWindow() or newWindowRequested().
QWebEnginePage::CopyLinkToClipboard (since Qt 5.6)15Copy the current link to the clipboard.
QWebEnginePage::CopyImageToClipboard (since Qt 5.6)17Copy the clicked image to the clipboard.
QWebEnginePage::CopyImageUrlToClipboard (since Qt 5.6)18Copy the clicked image's URL to the clipboard.
QWebEnginePage::CopyMediaUrlToClipboard (since Qt 5.6)20Copy the hovered audio or video's URL to the clipboard.
QWebEnginePage::ToggleMediaControls (since Qt 5.6)21Toggle between showing and hiding the controls for the hovered audio or video element.
QWebEnginePage::ToggleMediaLoop (since Qt 5.6)22Toggle whether the hovered audio or video should loop on completetion or not.
QWebEnginePage::ToggleMediaPlayPause (since Qt 5.6)23Toggle the play/pause state of the hovered audio or video element.
QWebEnginePage::ToggleMediaMute (since Qt 5.6)24Mute or unmute the hovered audio or video element.
QWebEnginePage::DownloadLinkToDisk (since Qt 5.6)16Download the current link to the disk. Requires a slot for downloadRequested().
QWebEnginePage::DownloadImageToDisk (since Qt 5.6)19Download the highlighted image to the disk. Requires a slot for downloadRequested().
QWebEnginePage::DownloadMediaToDisk (since Qt 5.6)25Download the hovered audio or video to the disk. Requires a slot for downloadRequested().
QWebEnginePage::InspectElement (since Qt 5.6)26Trigger any attached Web Inspector to inspect the highlighed element.
QWebEnginePage::ExitFullScreen (since Qt 5.6)27Exit the fullscreen mode.
QWebEnginePage::RequestClose (since Qt 5.6)28Request to close the web page. If defined, the window.onbeforeunload handler is run, and the user can confirm or reject to close the page. If the close request is confirmed, windowCloseRequested is emitted.
QWebEnginePage::Unselect (since Qt 5.7)29Clear the current selection.
QWebEnginePage::SavePage (since Qt 5.7)30Save the current page to disk. MHTML is the default format that is used to store the web page on disk. Requires a slot for downloadRequested().
QWebEnginePage::ViewSource (since Qt 5.8)32Show the source of the current page in a new tab. Requires implementation of createWindow() or newWindowRequested().
QWebEnginePage::ToggleBold (since Qt 5.10)33Toggles boldness for the selection or at the cursor position. Requires contenteditable="true".
QWebEnginePage::ToggleItalic (since Qt 5.10)34Toggles italics for the selection or at the cursor position. Requires contenteditable="true".
QWebEnginePage::ToggleUnderline (since Qt 5.10)35Toggles underlining of the selection or at the cursor position. Requires contenteditable="true".
QWebEnginePage::ToggleStrikethrough (since Qt 5.10)36Toggles striking through the selection or at the cursor position. Requires contenteditable="true".
QWebEnginePage::AlignLeft (since Qt 5.10)37Aligns the lines containing the selection or the cursor to the left. Requires contenteditable="true".
QWebEnginePage::AlignCenter (since Qt 5.10)38Aligns the lines containing the selection or the cursor at the center. Requires contenteditable="true".
QWebEnginePage::AlignRight (since Qt 5.10)39Aligns the lines containing the selection or the cursor to the right. Requires contenteditable="true".
QWebEnginePage::AlignJustified (since Qt 5.10)40Stretches the lines containing the selection or the cursor so that each line has equal width. Requires contenteditable="true".
QWebEnginePage::Indent (since Qt 5.10)41Indents the lines containing the selection or the cursor. Requires contenteditable="true".
QWebEnginePage::Outdent (since Qt 5.10)42Outdents the lines containing the selection or the cursor. Requires contenteditable="true".
QWebEnginePage::InsertOrderedList (since Qt 5.10)43Inserts an ordered list at the current cursor position, deleting the current selection. Requires contenteditable="true".
QWebEnginePage::InsertUnorderedList (since Qt 5.10)44Inserts an unordered list at the current cursor position, deleting the current selection. Requires contenteditable="true".
QWebEnginePage::ChangeTextDirectionLTR (since Qt 6.6)45Changes text direction to left-to-right in the focused input element.
QWebEnginePage::ChangeTextDirectionRTL (since Qt 6.6)46Changes text direction to right-to-left in the focused input element.

enum QWebEnginePage::WebWindowType

This enum describes the types of window that can be created by the createWindow() function:

ConstantValueDescription
QWebEnginePage::WebBrowserWindow0A complete web browser window.
QWebEnginePage::WebBrowserTab1A web browser tab.
QWebEnginePage::WebDialog2A window without decoration.
QWebEnginePage::WebBrowserBackgroundTab (since Qt 5.7)3A web browser tab without hiding the current visible WebEngineView.

Property Documentation

audioMuted : bool

This property holds whether the current page audio is muted.

The default value is false.

Access functions:

bool isAudioMuted() const
void setAudioMuted(bool muted)

Notifier signal:

void audioMutedChanged(bool muted)

See also recentlyAudible.

backgroundColor : QColor

This property holds the page's background color behind the document's body.

You can set the background color to Qt::transparent or to a translucent color to see through the document, or you can set it to match your web content in a hybrid application to prevent the white flashes that may appear during loading.

The default value is white.

Access functions:

QColor backgroundColor() const
void setBackgroundColor(const QColor &color)

[read-only] contentsSize : const QSizeF

This property holds the size of the page contents.

Access functions:

QSizeF contentsSize() const

Notifier signal:

void contentsSizeChanged(const QSizeF &size)

[read-only] hasSelection : const bool

This property holds whether this page contains selected content or not.

Access functions:

bool hasSelection() const

See also selectionChanged().

[read-only] icon : const QIcon

This property holds the icon associated with the page currently viewed.

By default, this property contains a null icon. If touch icons are disabled (see QWebEngineSettings::TouchIconsEnabled), the favicon is provided in two sizes (16x16 and 32x32 pixels) encapsulated in QIcon. Otherwise, single icon is provided with the largest available size.

Access functions:

QIcon icon() const

Notifier signal:

void iconChanged(const QIcon &icon)

See also iconChanged(), iconUrl(), iconUrlChanged(), and QWebEngineSettings::TouchIconsEnabled.

[read-only] iconUrl : const QUrl

This property holds the URL of the icon associated with the page currently viewed.

By default, this property contains an empty URL.

Access functions:

QUrl iconUrl() const

Notifier signal:

void iconUrlChanged(const QUrl &url)

See also iconUrlChanged(), icon(), and iconChanged().

lifecycleState : LifecycleState

This property holds the current lifecycle state of the page.

The following restrictions are enforced by the setter:

  • A visible page must remain in the Active state.
  • If the page is being inspected by a devToolsPage then both pages must remain in the Active states.
  • A page in the Discarded state can only transition to the Active state. This will cause a reload of the page.

These are the only hard limits on the lifecycle state, but see also recommendedState for the recommended soft limits.

Access functions:

QWebEnginePage::LifecycleState lifecycleState() const
void setLifecycleState(QWebEnginePage::LifecycleState state)

Notifier signal:

void lifecycleStateChanged(QWebEnginePage::LifecycleState state)

See also recommendedState, Page Lifecycle API, and WebEngine Lifecycle Example.

[read-only, since 6.2] loading : const bool

This property holds whether the page is currently loading.

This property was introduced in Qt 6.2.

Access functions:

bool isLoading() const

Notifier signal:

void loadingChanged(const QWebEngineLoadingInfo &loadingInfo)

See also QWebEngineLoadingInfo, loadStarted, and loadFinished.

[read-only] recentlyAudible : const bool

This property holds the current page's audible state, that is, whether audio was recently played or not.

The default value is false.

Access functions:

bool recentlyAudible() const

Notifier signal:

void recentlyAudibleChanged(bool recentlyAudible)

See also audioMuted.

[read-only] recommendedState : const LifecycleState

This property holds the recommended limit for the lifecycle state of the page.

Setting the lifecycle state to a lower resource usage state than the recommended state may cause side-effects such as stopping background audio playback or loss of HTML form input. Setting the lifecycle state to a higher resource state is however completely safe.

Access functions:

QWebEnginePage::LifecycleState recommendedState() const

Notifier signal:

void recommendedStateChanged(QWebEnginePage::LifecycleState state)

See also lifecycleState, Page Lifecycle API, and WebEngine Lifecycle Example.

[read-only] renderProcessPid : const qint64

This property holds the process ID (PID) of the render process assigned to the current page's main frame.

If no render process is available yet, 0 is returned.

Access functions:

qint64 renderProcessPid() const

Notifier signal:

void renderProcessPidChanged(qint64 pid)

[read-only] requestedUrl : const QUrl

This property holds the URL that was originally requested to be loaded by the page that is currently viewed.

Note: The URL may differ from the one returned by url(), which is the actual URL that results from DNS resolution or redirection.

Access functions:

QUrl requestedUrl() const

See also url() and setUrl().

[read-only] scrollPosition : const QPointF

This property holds the scroll position of the page contents.

Access functions:

QPointF scrollPosition() const

Notifier signal:

void scrollPositionChanged(const QPointF &position)

[read-only] selectedText : const QString

This property holds the text currently selected.

By default, this property contains an empty string.

Access functions:

QString selectedText() const

See also selectionChanged().

[read-only] title : const QString

This property holds the title of the page as defined by the HTML <title> element.

If the page has no <title> element, then the URL is used instead. For file:// URLs only the filename is used and not the full path.

By default, before any content has been loaded, this property contains an empty string.

Access functions:

QString title() const

Notifier signal:

void titleChanged(const QString &title)

See also titleChanged().

url : QUrl

This property holds the URL of the page currently viewed.

Setting this property clears the view and loads the URL.

By default, this property contains an empty, invalid URL.

Access functions:

QUrl url() const
void setUrl(const QUrl &url)

Notifier signal:

void urlChanged(const QUrl &url)

See also urlChanged().

visible : bool

This property holds whether the page is considered visible in the Page Visibility API.

Setting this property changes the Document.hidden and the Document.visibilityState properties in JavaScript which web sites can use to voluntarily reduce their resource usage if they are not visible to the user.

If the page is connected to a view then this property will be managed automatically by the view according to it's own visibility.

Access functions:

bool isVisible() const
void setVisible(bool visible)

Notifier signal:

void visibleChanged(bool visible)

See also lifecycleState.

zoomFactor : qreal

This property holds the zoom factor for the page content.

Valid values are within the range from 0.25 to 5.0. The default factor is 1.0.

Access functions:

qreal zoomFactor() const
void setZoomFactor(qreal factor)

Notifier signal:

void zoomFactorChanged(qreal factor)

See also zoomFactorChanged().

Member Function Documentation

void QWebEnginePage::runJavaScript(const QString &scriptSource, const std::function<void (const QVariant &)> &resultCallback)

void QWebEnginePage::runJavaScript(const QString &scriptSource, quint32 worldId = 0, const std::function<void (const QVariant &)> &resultCallback = {})

Runs the JavaScript code contained in scriptSource without checking whether the DOM of the page has been constructed. If you need more control over how the script is run, consider using scripts() instead.

To avoid conflicts with other scripts executed on the page, the world in which the script is run is specified by worldId. The world ID values are the same as provided by QWebEngineScript::ScriptWorldId, and between 0 and 256. If you leave out the world ID, the script is run in the MainWorld.

When the script has been executed, resultCallback is called with the result of the last executed statement. resultCallback can be any of a function pointer, a functor or a lambda, and it is expected to take a QVariant parameter. For example:

page.runJavaScript("document.title", [](const QVariant &v) { qDebug() << v.toString(); });

Only plain data can be returned from JavaScript as the result value. Supported data types include all of the JSON data types as well as, for example, Date and ArrayBuffer. Unsupported data types include, for example, Function and Promise.

Warning: Do not execute lengthy routines in the callback function, because it might block the rendering of the web engine page.

Warning: We guarantee that the callback (resultCallback) is always called, but it might be done during page destruction. When QWebEnginePage is deleted, the callback is triggered with an invalid value and it is not safe to use the corresponding QWebEnginePage or QWebEngineView instance inside it.

See also scripts(), QWebEngineScript::ScriptWorldId, QWebEngineFrame::runJavaScript, and Script Injection.

[explicit] QWebEnginePage::QWebEnginePage(QObject *parent = nullptr)

Constructs an empty QWebEnginePage with the parent parent.

QWebEnginePage::QWebEnginePage(QWebEngineProfile *profile, QObject *parent = nullptr)

Constructs an empty web engine page in the web engine profile profile with the parent parent.

If the profile is not the default profile, the caller must ensure that the profile stays alive for as long as the page does.

[virtual noexcept] QWebEnginePage::~QWebEnginePage()

Destroys the web page.

[virtual protected] bool QWebEnginePage::acceptNavigationRequest(const QUrl &url, QWebEnginePage::NavigationType type, bool isMainFrame)

This function is called upon receiving a request to navigate to the specified url by means of the specified navigation type type. isMainFrame indicates whether the request corresponds to the main frame or a child frame. If the function returns true, the navigation request is accepted and url is loaded. The default implementation accepts all navigation requests.

Navigation requests can be delegated to the Qt application instead of having the HTML handler engine process them by overloading this function. This is necessary when an HTML document is used as part of the user interface, and not to display external data, for example, when displaying a list of results.

Note: This function is not called for fragment navigation on the same page. Such navigation, for example, happens by clicking a link to a '#fragment' within the page. It does not trigger a load to a different document, even though it changes page's url and adds history entry. It only serves as a shortcut to scroll within the page. Hence, no delegation of this navigation type is expected to happen.

Note: The loading process is started and the loadStarted() signal is emitted before the request is accepted or rejected. Therefore, a loadFinished() signal that returns false is to be expected even after delegating the request.

Note: When using setHtml or setContent with relative links, make sure to specify a base url, otherwise the links will be considered invalid and no navigation requests will be emitted.

The QWebEngineUrlRequestInterceptor class offers further options for intercepting and manipulating requests.

QAction *QWebEnginePage::action(QWebEnginePage::WebAction action) const

Returns a QAction for the specified WebAction action.

The action is owned by the QWebEnginePage but you can customize the look by changing its properties.

QWebEnginePage::action(WebAction action) does not have a default styled icon. Use QWebEngineView::pageAction() to have an action with a default styled icon.

QWebEnginePage also takes care of implementing the action, so that upon triggering the corresponding action is performed on the page.

See also triggerAction().

[signal] void QWebEnginePage::audioMutedChanged(bool muted)

This signal is emitted when the page's muted state changes.

Note: Not to be confused with a specific HTML5 audio or video element being muted.

Note: Notifier signal for property audioMuted.

[signal] void QWebEnginePage::authenticationRequired(const QUrl &requestUrl, QAuthenticator *authenticator)

This signal is emitted when access to requestUrl requires authentication. authenticator should be used to pass the user name and password for the connection.

[signal] void QWebEnginePage::certificateError(const QWebEngineCertificateError &certificateError)

This signal is emitted when an invalid certificate error is raised while loading a given request.

The certificateError parameter contains information about the certificate and details of the error, it also provides the way to ignore the error and complete the request or stop loading the request.

See also QWebEngineCertificateError.

[virtual protected] QStringList QWebEnginePage::chooseFiles(QWebEnginePage::FileSelectionMode mode, const QStringList &oldFiles, const QStringList &acceptedMimeTypes)

This function is called when the web content requests a file name, for example as a result of the user clicking on a file upload button in an HTML form.

mode indicates whether only one file or multiple files are expected to be returned.

A suggested filename may be provided as the first entry of oldFiles. acceptedMimeTypes is ignored by the default implementation, but might be used by overrides.

[virtual protected] QWebEnginePage *QWebEnginePage::createWindow(QWebEnginePage::WebWindowType type)

This function is called to create a new window of the specified type. For example, when a JavaScript program requests to open a document in a new window.

If the new window can be created, the new window's QWebEnginePage is returned; otherwise a null pointer is returned.

If the view associated with the web page is a QWebEngineView object, then the default implementation forwards the request to QWebEngineView::createWindow(); otherwise it returns a null pointer.

If this call is not implemented or does not return a new page, newWindowRequested() is emitted to handle the request.

Note: In the cases when the window creation is being triggered by JavaScript, apart from reimplementing this method the application must also set QWebEngineSettings::JavascriptCanOpenWindows to true in order for the method to get called.

See also QWebEngineView::createWindow() and newWindowRequested().

[since 6.6] QString QWebEnginePage::devToolsId() const

Returns the id of the developer tools host associated with this page.

If remote debugging is enabled (see Qt WebEngine Developer Tools), the id can be used to build the URL to connect to the developer tool websocket: ws://localhost:<debugggin-port>/devtools/page/<id>). The websocket can be used to to interact with the page using the DevTools Protocol.

This function was introduced in Qt 6.6.

QWebEnginePage *QWebEnginePage::devToolsPage() const

Returns the page that is hosting the developer tools of this page, if any.

Returns nullptr if no developer tools page is set.

See also setDevToolsPage() and inspectedPage().

void QWebEnginePage::download(const QUrl &url, const QString &filename = QString())

Downloads the resource from the location given by url to a local file.

If filename is given, it is used as the suggested file name. If it is relative, the file is saved in the standard download location with the given name. If it is a null or empty QString, the default file name is used.

This will emit QWebEngineProfile::downloadRequested() after the download has started.

[override virtual] bool QWebEnginePage::event(QEvent *e)

Reimplements: QObject::event(QEvent *e).

[signal, since 6.4] void QWebEnginePage::fileSystemAccessRequested(QWebEngineFileSystemAccessRequest request)

This signal is emitted when the web page requests access to local files or directories.

The request object request can be used to accept or reject the request.

This function was introduced in Qt 6.4.

[since 6.8] std::optional<QWebEngineFrame> QWebEnginePage::findFrameByName(const QString &name)

Returns the frame with the given name. If there are multiple frames with the same name, which one is returned is arbitrary. If no frame was found, returns std::nullopt.

This function was introduced in Qt 6.8.

void QWebEnginePage::findText(const QString &subString, QWebEnginePage::FindFlags options = {}, const std::function<void (const QWebEngineFindTextResult &)> &resultCallback = std::function<void(const QWebEngineFindTextResult &)>())

Finds the specified string, subString, in the page, using the given options. The findTextFinished() signal is emitted when a string search is completed.

To clear the search highlight, just pass an empty string.

The resultCallback must take a QWebEngineFindTextResult parameter.

Warning: We guarantee that the callback (resultCallback) is always called, but it might be done during page destruction. When QWebEnginePage is deleted, the callback is triggered with an invalid value and it is not safe to use the corresponding QWebEnginePage or QWebEngineView instance inside it.

For example:

    m_view->page()->findText(QStringLiteral("Qt"), QWebEnginePage::FindFlags(), [this](const QWebEngineFindTextResult &result) {
        if (result.numberOfMatches() == 0) QMessageBox::information(m_view, QString(), QStringLiteral("No occurrences found"));
    });

See also findTextFinished().

[signal] void QWebEnginePage::findTextFinished(const QWebEngineFindTextResult &result)

This signal is emitted when a search string search on a page is completed. result is the result of the string search.

See also findText().

[signal] void QWebEnginePage::fullScreenRequested(QWebEngineFullScreenRequest fullScreenRequest)

This signal is emitted when the web page issues the request to enter fullscreen mode for a web-element, usually a video element.

The request object fullScreenRequest can be used to accept or reject the request.

If the request is accepted the element requesting fullscreen will fill the viewport, but it is up to the application to make the view fullscreen or move the page to a view that is fullscreen.

See also QWebEngineSettings::FullScreenSupportEnabled.

[signal] void QWebEnginePage::geometryChangeRequested(const QRect &geom)

This signal is emitted whenever the document wants to change the position and size of the page to geom. This can happen for example through JavaScript.

Note: setGeometry() expects a size excluding the window decoration, while geom includes it. You have to remove the size of the frame margins from geom to handle this signal correctly.

window->setGeometry(geom.marginsRemoved(window->frameMargins()));

QWebEngineHistory *QWebEnginePage::history() const

Returns a pointer to the view's history of navigated web pages.

[signal] void QWebEnginePage::iconChanged(const QIcon &icon)

This signal is emitted when the icon ("favicon") associated with the page is changed. The new icon is specified by icon.

Note: Notifier signal for property icon.

See also icon(), iconUrl(), and iconUrlChanged().

[signal] void QWebEnginePage::iconUrlChanged(const QUrl &url)

This signal is emitted when the URL of the icon ("favicon") associated with the page is changed. The new URL is specified by url.

Note: Notifier signal for property iconUrl.

See also iconUrl(), icon(), and iconChanged().

QWebEnginePage *QWebEnginePage::inspectedPage() const

Returns the page this page is inspecting, if any.

Returns nullptr if this page is not a developer tools page.

See also setInspectedPage() and devToolsPage().

[virtual protected] void QWebEnginePage::javaScriptAlert(const QUrl &securityOrigin, const QString &msg)

This function is called whenever a JavaScript program running in a frame affiliated with securityOrigin calls the alert() function with the message msg.

The default implementation shows the message, msg, with QMessageBox::information.

[virtual protected] bool QWebEnginePage::javaScriptConfirm(const QUrl &securityOrigin, const QString &msg)

This function is called whenever a JavaScript program running in a frame affiliated with securityOrigin calls the confirm() function with the message msg. Returns true if the user confirms the message; otherwise returns false.

It is also called when the onbeforeunload handler is requesting a confirmation before leaving a page.

The default implementation executes the query using QMessageBox::information with QMessageBox::Ok and QMessageBox::Cancel buttons.

[virtual protected] void QWebEnginePage::javaScriptConsoleMessage(QWebEnginePage::JavaScriptConsoleMessageLevel level, const QString &message, int lineNumber, const QString &sourceID)

This function is called when a JavaScript program tries to print the message to the web browser's console.

For example, in case of evaluation errors the source URL may be provided in sourceID as well as the lineNumber.

level indicates the severity of the event that triggered the message. That is, whether it was triggered by an error or a less severe event.

Since Qt 5.6, the default implementation logs the messages in a js logging category.

See also Console Logging.

[virtual protected] bool QWebEnginePage::javaScriptPrompt(const QUrl &securityOrigin, const QString &msg, const QString &defaultValue, QString *result)

This function is called whenever a JavaScript program running in a frame affiliated with securityOrigin tries to prompt the user for input. The program may provide an optional message, msg, as well as a default value for the input in defaultValue.

If the prompt was cancelled by the user, the implementation should return false; otherwise the result should be written to result and true should be returned. If the prompt was not cancelled by the user, the implementation should return true and the result string must not be null.

The default implementation uses QInputDialog::getText().

[signal] void QWebEnginePage::linkHovered(const QString &url)

This signal is emitted when the mouse hovers over a link. url contains the target URL of the link.

void QWebEnginePage::load(const QUrl &url)

Loads url into this page.

Note: The view remains the same until enough data has arrived to display the new URL.

See also setUrl(), setHtml(), and setContent().

void QWebEnginePage::load(const QWebEngineHttpRequest &request)

Issues the specified request and loads the response.

See also load(), setUrl(), url(), urlChanged(), and QUrl::fromUserInput().

[signal] void QWebEnginePage::loadFinished(bool ok)

This signal is emitted when the page finishes loading content. This signal is independent of script execution or page rendering. ok will indicate whether the load was successful or any error occurred.

Note: Navigation requests can be delegated to the Qt application instead of having the HTML handler engine process them by overloading the acceptNavigationRequest() function. Because the loading process is started and the loadStarted() signal is emitted before the request is accepted or rejected, a loadFinished() signal that returns false is to be expected even after delegating the request.

See also loadStarted() and acceptNavigationRequest().

[signal] void QWebEnginePage::loadProgress(int progress)

This signal is emitted when the global progress status changes. The current value is provided by progress and scales from 0 to 100, which is the default range of QProgressBar. It accumulates changes from all the child frames.

[signal] void QWebEnginePage::loadStarted()

This signal is emitted when a page starts loading content.

See also loadFinished() and acceptNavigationRequest().

[signal, since 6.2] void QWebEnginePage::loadingChanged(const QWebEngineLoadingInfo &loadingInfo)

This signal is emitted when loading the page specified by loadingInfo begins, ends, or fails.

Note: Notifier signal for property loading.

This function was introduced in Qt 6.2.

[since 6.8] QWebEngineFrame QWebEnginePage::mainFrame()

The main, top-level frame of the page. All other frames on this page are accessible as children of the main frame.

This function was introduced in Qt 6.8.

This signal is emitted on navigation together with the call the acceptNavigationRequest(). It can be used to accept or ignore the request. The default is to accept.

This function was introduced in Qt 6.2.

See also acceptNavigationRequest().

[signal, since 6.2] void QWebEnginePage::newWindowRequested(QWebEngineNewWindowRequest &request)

This signal is emitted when request is issued to load a page in a separate web engine window. This can either be because the current page requested it explicitly through a JavaScript call to window.open, or because the user clicked on a link while holding Shift, Ctrl, or a built-in combination that triggers the page to open in a new window.

The signal is handled by calling openIn() with the new page on the request. If this signal is not handled, the requested load will fail.

Note: This signal is not emitted if createWindow() handled the request first.

This function was introduced in Qt 6.2.

See also createWindow() and QWebEngineNewWindowRequest::openIn().

[signal] void QWebEnginePage::pdfPrintingFinished(const QString &filePath, bool success)

This signal is emitted when printing the web page into a PDF file has finished. filePath will contain the path the file was requested to be created at, and success will be true if the file was successfully created and false otherwise.

See also printToPdf().

[signal, since 6.8] void QWebEnginePage::permissionRequested(QWebEnginePermission permission)

This signal is emitted when a web site requests to make use of a feature (e.g. geolocation access, permission to send notifications). The permission object can queried for the requesting URL and the QWebEnginePermission::Feature it's asking for, as well as to grant or deny permission.

This function was introduced in Qt 6.8.

[signal] void QWebEnginePage::printRequested()

This signal is emitted when the JavaScript window.print() method is called on the main frame, or the user pressed the print button of PDF viewer plugin. Typically, the signal handler can simply call printToPdf().

Since 6.8, this signal is only emitted for the main frame, instead of being emitted for any frame that requests printing.

See also printToPdf() and printRequestedByFrame().

[signal, since 6.8] void QWebEnginePage::printRequestedByFrame(QWebEngineFrame frame)

This signal is emitted when the JavaScript window.print() method is called on frame. If the frame is the main frame, printRequested is emitted instead.

This function was introduced in Qt 6.8.

See also printRequested(), printToPdf(), and QWebEngineFrame::printToPdf().

void QWebEnginePage::printToPdf(const QString &filePath, const QPageLayout &layout = QPageLayout(QPageSize(QPageSize::A4), QPageLayout::Portrait, QMarginsF()), const QPageRanges &ranges = {})

Renders the current content of the page into a PDF document and saves it in the location specified in filePath. The page size and orientation of the produced PDF document are taken from the values specified in layout, while the range of pages printed is taken from ranges with the default being printing all pages.

This method issues an asynchronous request for printing the web page into a PDF and returns immediately. To be informed about the result of the request, connect to the signal pdfPrintingFinished().

Note: The QWebEnginePage::Stop web action can be used to interrupt this asynchronous operation.

If a file already exists at the provided file path, it will be overwritten.

See also pdfPrintingFinished().

void QWebEnginePage::printToPdf(const std::function<void (const QByteArray &)> &resultCallback, const QPageLayout &layout = QPageLayout(QPageSize(QPageSize::A4), QPageLayout::Portrait, QMarginsF()), const QPageRanges &ranges = {})

Renders the current content of the page into a PDF document and returns a byte array containing the PDF data as parameter to resultCallback. The page size and orientation of the produced PDF document are taken from the values specified in layout, while the range of pages printed is taken from ranges with the default being printing all pages.

The resultCallback must take a const reference to a QByteArray as parameter. If printing was successful, this byte array will contain the PDF data, otherwise, the byte array will be empty.

Note: The QWebEnginePage::Stop web action can be used to interrupt this operation.

Warning: We guarantee that the callback (resultCallback) is always called, but it might be done during page destruction. When QWebEnginePage is deleted, the callback is triggered with an invalid value and it is not safe to use the corresponding QWebEnginePage or QWebEngineView instance inside it.

QWebEngineProfile *QWebEnginePage::profile() const

Returns the web engine profile the page belongs to.

[signal] void QWebEnginePage::proxyAuthenticationRequired(const QUrl &requestUrl, QAuthenticator *authenticator, const QString &proxyHost)

This signal is emitted when access to requestUrl via proxyHost requires authentication for the proxy. authenticator should be used to pass the user name and password for the connection.

[signal] void QWebEnginePage::recentlyAudibleChanged(bool recentlyAudible)

This signal is emitted when the page's audible state, recentlyAudible, changes, because the audio is played or stopped.

Note: The signal is also emitted when calling the setAudioMuted() method.

Note: Notifier signal for property recentlyAudible.

[signal] void QWebEnginePage::registerProtocolHandlerRequested(QWebEngineRegisterProtocolHandlerRequest request)

This signal is emitted when the web page tries to register a custom protocol using the registerProtocolHandler API.

The request object request can be used to accept or reject the request:

void WebView::handleRegisterProtocolHandlerRequested(
        QWebEngineRegisterProtocolHandlerRequest request)
{
    auto answer = QMessageBox::question(window(), tr("Permission Request"),
                                        tr("Allow %1 to open all %2 links?")
                                                .arg(request.origin().host())
                                                .arg(request.scheme()));
    if (answer == QMessageBox::Yes)
        request.accept();
    else
        request.reject();
}

[signal] void QWebEnginePage::renderProcessPidChanged(qint64 pid)

This signal is emitted when the underlying render process PID, pid, changes.

Note: Notifier signal for property renderProcessPid.

[signal] void QWebEnginePage::renderProcessTerminated(QWebEnginePage::RenderProcessTerminationStatus terminationStatus, int exitCode)

This signal is emitted when the render process is terminated with a non-zero exit status. terminationStatus is the termination status of the process and exitCode is the status code with which the process terminated.

void QWebEnginePage::replaceMisspelledWord(const QString &replacement)

Replace the current misspelled word with replacement.

The current misspelled word can be found in QWebEngineContextMenuRequest::misspelledWord(), and suggested replacements in QWebEngineContextMenuRequest::spellCheckerSuggestions().

void QWebEnginePage::save(const QString &filePath, QWebEngineDownloadRequest::SavePageFormat format = QWebEngineDownloadRequest::MimeHtmlSaveFormat) const

Save the currently loaded web page to disk.

The web page is saved to filePath in the specified format.

This is a short cut for the following actions:

  • Trigger the Save web action.
  • Accept the next download item and set the specified file path and save format.

This function issues an asynchronous download request for the web page and returns immediately.

See also QWebEngineDownloadRequest::SavePageFormat.

QWebEngineScriptCollection &QWebEnginePage::scripts()

Returns the collection of scripts that are injected into the page.

In addition, a page might also execute scripts added through QWebEngineProfile::scripts().

See also QWebEngineScriptCollection, QWebEngineScript, and Script Injection.

[signal] void QWebEnginePage::selectClientCertificate(QWebEngineClientCertificateSelection clientCertificateSelection)

This signal is emitted when a web site requests an SSL client certificate, and one or more were found in system's client certificate store.

Handling the signal is asynchronous, and loading will be waiting until a certificate is selected, or the last copy of clientCertificateSelection is destroyed.

If the signal is not handled, clientCertificateSelection is automatically destroyed, and loading will continue without a client certificate.

See also QWebEngineClientCertificateSelection.

[signal] void QWebEnginePage::selectionChanged()

This signal is emitted whenever the selection changes, either interactively or programmatically. For example, by calling triggerAction() with a selection action.

Note: When using the mouse to select text by left-clicking and dragging, the signal will be emitted for each new character selected, and not upon releasing the left mouse button.

See also selectedText().

void QWebEnginePage::setContent(const QByteArray &data, const QString &mimeType = QString(), const QUrl &baseUrl = QUrl())

Sets the content of the web page to data. If the mimeType argument is empty, it is assumed that the content is text/plain,charset=US-ASCII.

External objects referenced in the content are located relative to baseUrl. For external objects with relative URLs to be loaded, baseUrl cannot be empty.

The data is loaded immediately; external objects are loaded asynchronously.

Note: This method will not affect session or global history for the page.

Warning: The content will be percent encoded before being sent to the renderer via IPC. This may increase its size. The maximum size of the percent encoded content is 2 megabytes minus 6 bytes plus the length of the mime type string.

See also toHtml() and setHtml().

void QWebEnginePage::setDevToolsPage(QWebEnginePage *devToolsPage)

Binds devToolsPage to be the developer tools of this page. Triggers devToolsPage to navigate to an internal URL with the developer tools.

This is the same as calling setInspectedPage() on devToolsPage with this as argument.

See also devToolsPage() and setInspectedPage().

void QWebEnginePage::setHtml(const QString &html, const QUrl &baseUrl = QUrl())

Sets the content of this page to html. baseUrl is optional and used to resolve relative URLs in the document, such as referenced images or stylesheets.

The html is loaded immediately; external objects are loaded asynchronously.

If a script in the html runs longer than the default script timeout (currently 10 seconds), for example due to being blocked by a modal JavaScript alert dialog, this method will return as soon as possible after the timeout and any subsequent html will be loaded asynchronously.

When using this method, the web engine assumes that external resources, such as JavaScript programs or style sheets, are encoded in UTF-8 unless otherwise specified. For example, the encoding of an external script can be specified through the charset attribute of the HTML script tag. It is also possible for the encoding to be specified by the web server.

This is a convenience function equivalent to setContent(html, "text/html", baseUrl).

Note: This method will not affect session or global history for the page.

Warning: This function works only for HTML, for other mime types (such as XHTML and SVG) setContent() should be used instead.

Warning: The content will be percent encoded before being sent to the renderer via IPC. This may increase its size. The maximum size of the percent encoded content is 2 megabytes minus 30 bytes.

See also toHtml(), setContent(), and load().

void QWebEnginePage::setInspectedPage(QWebEnginePage *page)

Navigates this page to an internal URL that is the developer tools of page.

This is the same as calling setDevToolsPage() on page with this as argument.

See also inspectedPage() and setDevToolsPage().

void QWebEnginePage::setUrlRequestInterceptor(QWebEngineUrlRequestInterceptor *interceptor)

Registers the request interceptor interceptor to intercept URL requests.

The page does not take ownership of the pointer. This interceptor is called after any interceptors on the profile, and unlike profile interceptors, only URL requests from this page are intercepted. If the original request was already blocked or redirected by the profile interceptor, it will not be intercepted by this.

To unset the request interceptor, set a nullptr.

See also QWebEngineUrlRequestInfo and QWebEngineProfile::setUrlRequestInterceptor().

void QWebEnginePage::setWebChannel(QWebChannel *channel, quint32 worldId = 0)

Sets the web channel instance to be used by this page to channel and connects it to web engine's transport using Chromium IPC messages. The transport is exposed in the JavaScript world worldId as qt.webChannelTransport, which should be used when using the Qt WebChannel JavaScript API.

Note: The page does not take ownership of the channel object.

Note: Only one web channel can be installed per page, setting one even in another JavaScript world uninstalls any already installed web channel.

See also webChannel() and QWebEngineScript::ScriptWorldId.

QWebEngineSettings *QWebEnginePage::settings() const

Returns a pointer to the page's settings object.

[signal] void QWebEnginePage::titleChanged(const QString &title)

This signal is emitted whenever the title of the page changes. The title string specifies the new title.

Note: Notifier signal for property title.

See also title().

void QWebEnginePage::toHtml(const std::function<void (const QString &)> &resultCallback) const

Asynchronous method to retrieve the page's content as HTML, enclosed in HTML and BODY tags. Upon successful completion, resultCallback is called with the page's content.

Note: resultCallback can be any of a function pointer, a functor or a lambda, and it is expected to take a QString parameter.

Warning: We guarantee that the callback (resultCallback) is always called, but it might be done during page destruction. When QWebEnginePage is deleted, the callback is triggered with an invalid value and it is not safe to use the corresponding QWebEnginePage or QWebEngineView instance inside it.

See also setHtml() and toPlainText().

void QWebEnginePage::toPlainText(const std::function<void (const QString &)> &resultCallback) const

Asynchronous method to retrieve the page's content converted to plain text, completely stripped of all HTML formatting. Upon successful completion, resultCallback is called with the page's content.

Note: resultCallback can be any of a function pointer, a functor or a lambda, and it is expected to take a QString parameter.

Warning: We guarantee that the callback (resultCallback) is always called, but it might be done during page destruction. When QWebEnginePage is deleted, the callback is triggered with an invalid value and it is not safe to use the corresponding QWebEnginePage or QWebEngineView instance inside it.

See also toHtml().

[virtual] void QWebEnginePage::triggerAction(QWebEnginePage::WebAction action, bool checked = false)

This function can be called to trigger the specified action. It is also called by Qt WebEngine if the user triggers the action, for example through a context menu item.

If action is a checkable action, then checked specifies whether the action is toggled or not.

See also action().

[signal] void QWebEnginePage::urlChanged(const QUrl &url)

This signal is emitted with the URL of the page when the page title is received. The new URL is specified by url.

Note: Notifier signal for property url.

See also url().

[signal, since 6.7] void QWebEnginePage::webAuthUxRequested(QWebEngineWebAuthUxRequest *request)

This signal is emitted when a WebAuth authenticator needs user interaction during the authentication process. These requests are handled by displaying a dialog to the user.

The request contains the information and API required to complete the WebAuth UX request.

This function was introduced in Qt 6.7.

See also QWebEngineWebAuthUxRequest.

QWebChannel *QWebEnginePage::webChannel() const

Returns a pointer to the web channel instance used by this page or a null pointer if none was set. This channel automatically uses the internal web engine transport mechanism over Chromium IPC that is exposed in the JavaScript context of this page as qt.webChannelTransport.

See also setWebChannel().

[signal] void QWebEnginePage::windowCloseRequested()

This signal is emitted whenever the page requests the web browser window to be closed, for example through the JavaScript window.close() call.

See also RequestClose.

[signal, since 6.8] void QWebEnginePage::zoomFactorChanged(qreal factor)

This signal is emitted whenever the zoom factor for the page changes.

Note: Notifier signal for property zoomFactor.

This function was introduced in Qt 6.8.

See also zoomFactor() and setZoomFactor().

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