- Qt 6.5
- Qt WebEngine
- C++ Classes
- QtWebEngineCore
- QWebEnginePage
- Qt 6.5.3 Reference Documentation

# 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

- List of all members, including inherited members
- Deprecated members

## Public Types

enum | Feature { Notifications, Geolocation, MediaAudioCapture, MediaVideoCapture, MediaAudioVideoCapture, …, DesktopAudioVideoCapture }
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 | PermissionPolicy { PermissionUnknown, PermissionGrantedByUser, PermissionDeniedByUser }
enum | RenderProcessTerminationStatus { NormalTerminationStatus, AbnormalTerminationStatus, CrashedTerminationStatus, KilledTerminationStatus }
enum | WebAction { NoWebAction, Back, Forward, Stop, Reload, …, InsertUnorderedList }
enum | WebWindowType { WebBrowserWindow, WebBrowserTab, WebDialog, WebBrowserBackgroundTab }

## Properties

audioMuted : bool backgroundColor : QColor contentsSize : const QSizeF hasSelection : const bool icon : const QIcon iconUrl : const QUrl lifecycleState : LifecycleState loading : const bool recentlyAudible : const bool | recommendedState : const LifecycleState renderProcessPid : const qint64 requestedUrl : const QUrl scrollPosition : const QPointF selectedText : const QString title : const QString url : QUrl visible : bool zoomFactor : qreal

## 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
QWebEnginePage * | devToolsPage() const
void | download(const QUrl &url, const QString &filename = QString())
void | findText(const QString &subString, QWebEnginePage::FindFlags options = {}, const std::function<void (const QWebEngineFindTextResult &)> &resultCallback = ...)
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)
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 | setFeaturePermission(const QUrl &securityOrigin, QWebEnginePage::Feature feature, QWebEnginePage::PermissionPolicy policy)
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)
void | featurePermissionRequestCanceled(const QUrl &securityOrigin, QWebEnginePage::Feature feature)
void | featurePermissionRequested(const QUrl &securityOrigin, QWebEnginePage::Feature feature)
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()
void | loadingChanged(const QWebEngineLoadingInfo &loadingInfo)
void | navigationRequested(QWebEngineNavigationRequest &request)
void | newWindowRequested(QWebEngineNewWindowRequest &request)
void | pdfPrintingFinished(const QString &filePath, bool success)
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)
void | windowCloseRequested()

## 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::Feature

This enum describes the platform feature access categories that the user may be asked to grant or deny access to:

Constant | Value | Description
--- | --- | ---
`QWebEnginePage::Notifications` | `0` | Web notifications for the end-user.
`QWebEnginePage::Geolocation` | `1` | Location hardware or service.
`QWebEnginePage::MediaAudioCapture` | `2` | Audio capture devices, such as microphones.
`QWebEnginePage::MediaVideoCapture` | `3` | Video devices, such as cameras.
`QWebEnginePage::MediaAudioVideoCapture` | `4` | Both audio and video capture devices.
`QWebEnginePage::MouseLock` | `5` | Mouse locking, which locks the mouse pointer to the web view and is typically used in games.
`QWebEnginePage::DesktopVideoCapture` | `6` | Video output capture, that is, the capture of the user's display, for screen sharing purposes for example. (Added in Qt 5.10)
`QWebEnginePage::DesktopAudioVideoCapture` | `7` | Both audio and video output capture. (Added in Qt 5.10)

See also featurePermissionRequested(), featurePermissionRequestCanceled(), setFeaturePermission(), and PermissionPolicy.

### enum QWebEnginePage::FileSelectionMode

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

Constant | Value | Description
--- | --- | ---
`QWebEnginePage::FileSelectOpen` | `0` | Return only one file name.
`QWebEnginePage::FileSelectOpenMultiple` | `1` | Return multiple file names.
`QWebEnginePage::FileSelectUploadFolder` | `2` | Allows users to specify a single existing folder for upload.
`QWebEnginePage::FileSelectSave` | `3` | Specify 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:

Constant | Value | Description
--- | --- | ---
`QWebEnginePage::FindBackward` | `1` | Searches backwards instead of forwards.
`QWebEnginePage::FindCaseSensitively` | `2` | By 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:

Constant | Value | Description
--- | --- | ---
`QWebEnginePage::InfoMessageLevel` | `0` | The message is purely informative and can safely be ignored.
`QWebEnginePage::WarningMessageLevel` | `1` | The message informs about unexpected behavior or errors that may need attention.
`QWebEnginePage::ErrorMessageLevel` | `2` | The message indicates there has been an error.

### enum class QWebEnginePage::LifecycleState

This enum describes the lifecycle state of the page:

Constant | Value | Description
--- | --- | ---
`QWebEnginePage::LifecycleState::Active` | `0` | Normal state.
`QWebEnginePage::LifecycleState::Frozen` | `1` | Low CPU usage state where most HTML task sources are suspended.
`QWebEnginePage::LifecycleState::Discarded` | `2` | Very low resource usage state where the entire browsing context is discarded.

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

### enum QWebEnginePage::NavigationType

This enum describes the type of a navigation request:

Constant | Value | Description
--- | --- | ---
`QWebEnginePage::NavigationTypeLinkClicked` | `0` | The navigation request resulted from a clicked link.
`QWebEnginePage::NavigationTypeTyped` | `1` | The navigation request resulted from an explicitly loaded URL.
`QWebEnginePage::NavigationTypeFormSubmitted` | `2` | The navigation request resulted from a form submission.
`QWebEnginePage::NavigationTypeBackForward` | `3` | The navigation request resulted from a back or forward action.
`QWebEnginePage::NavigationTypeReload` | `4` | The navigation request resulted from a reload action.
`QWebEnginePage::NavigationTypeRedirect` | `6` | The navigation request resulted from a content or server controlled redirect. This also includes automatic reloads. (Added in Qt 5.14)
`QWebEnginePage::NavigationTypeOther` | `5` | The navigation request was triggered by other means not covered by the above.

See also acceptNavigationRequest().

### enum QWebEnginePage::PermissionPolicy

This enum describes the permission policies that the user may set for data or device access:

Constant | Value | Description
--- | --- | ---
`QWebEnginePage::PermissionUnknown` | `0` | It is unknown whether the user grants or denies permission.
`QWebEnginePage::PermissionGrantedByUser` | `1` | The user has granted permission.
`QWebEnginePage::PermissionDeniedByUser` | `2` | The user has denied permission.

See also featurePermissionRequested(), featurePermissionRequestCanceled(), setFeaturePermission(), and Feature.

### enum QWebEnginePage::RenderProcessTerminationStatus

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

Constant | Value | Description
--- | --- | ---
`QWebEnginePage::NormalTerminationStatus` | `0` | The render process terminated normally.
`QWebEnginePage::AbnormalTerminationStatus` | `1` | The render process terminated with with a non-zero exit status.
`QWebEnginePage::CrashedTerminationStatus` | `2` | The render process crashed, for example because of a segmentation fault.
`QWebEnginePage::KilledTerminationStatus` | `3` | The 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().

Constant | Value | Description
--- | --- | ---
`QWebEnginePage::NoWebAction` | `- 1` | No action is triggered.
`QWebEnginePage::Back` | `0` | Navigate back in the history of navigated links.
`QWebEnginePage::Forward` | `1` | Navigate forward in the history of navigated links.
`QWebEnginePage::Stop` | `2` | Stop loading the current page.
`QWebEnginePage::Reload` | `3` | Reload the current page.
`QWebEnginePage::ReloadAndBypassCache` | `10` | Reload the current page, but do not use any local cache.
`QWebEnginePage::Cut` | `4` | Cut the content currently selected into the clipboard.
`QWebEnginePage::Copy` | `5` | Copy the content currently selected into the clipboard.
`QWebEnginePage::Paste` | `6` | Paste content from the clipboard.
`QWebEnginePage::Undo` | `7` | Undo the last editing action.
`QWebEnginePage::Redo` | `8` | Redo the last editing action.
`QWebEnginePage::SelectAll` | `9` | Select 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::PasteAndMatchStyle` | `11` | Paste content from the clipboard with current style.
`QWebEnginePage::OpenLinkInThisWindow` | `12` | Open the current link in the current window. (Added in Qt 5.6)
`QWebEnginePage::OpenLinkInNewWindow` | `13` | Open the current link in a new window. Requires implementation of createWindow() or newWindowRequested() (Added in Qt 5.6)
`QWebEnginePage::OpenLinkInNewTab` | `14` | Open the current link in a new tab. Requires implementation of createWindow() or newWindowRequested(). (Added in Qt 5.6)
`QWebEnginePage::OpenLinkInNewBackgroundTab` | `31` | Open the current link in a new background tab. Requires implementation of createWindow() or newWindowRequested(). (Added in Qt 5.7)
`QWebEnginePage::CopyLinkToClipboard` | `15` | Copy the current link to the clipboard. (Added in Qt 5.6)
`QWebEnginePage::CopyImageToClipboard` | `17` | Copy the clicked image to the clipboard. (Added in Qt 5.6)
`QWebEnginePage::CopyImageUrlToClipboard` | `18` | Copy the clicked image's URL to the clipboard. (Added in Qt 5.6)
`QWebEnginePage::CopyMediaUrlToClipboard` | `20` | Copy the hovered audio or video's URL to the clipboard. (Added in Qt 5.6)
`QWebEnginePage::ToggleMediaControls` | `21` | Toggle between showing and hiding the controls for the hovered audio or video element. (Added in Qt 5.6)
`QWebEnginePage::ToggleMediaLoop` | `22` | Toggle whether the hovered audio or video should loop on completetion or not. (Added in Qt 5.6)
`QWebEnginePage::ToggleMediaPlayPause` | `23` | Toggle the play/pause state of the hovered audio or video element. (Added in Qt 5.6)
`QWebEnginePage::ToggleMediaMute` | `24` | Mute or unmute the hovered audio or video element. (Added in Qt 5.6)
`QWebEnginePage::DownloadLinkToDisk` | `16` | Download the current link to the disk. Requires a slot for downloadRequested(). (Added in Qt 5.6)
`QWebEnginePage::DownloadImageToDisk` | `19` | Download the highlighted image to the disk. Requires a slot for downloadRequested(). (Added in Qt 5.6)
`QWebEnginePage::DownloadMediaToDisk` | `25` | Download the hovered audio or video to the disk. Requires a slot for downloadRequested(). (Added in Qt 5.6)
`QWebEnginePage::InspectElement` | `26` | Trigger any attached Web Inspector to inspect the highlighed element. (Added in Qt 5.6)
`QWebEnginePage::ExitFullScreen` | `27` | Exit the fullscreen mode. (Added in Qt 5.6)
`QWebEnginePage::RequestClose` | `28` | Request 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. (Added in Qt 5.6)
`QWebEnginePage::Unselect` | `29` | Clear the current selection. (Added in Qt 5.7)
`QWebEnginePage::SavePage` | `30` | Save 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(). (Added in Qt 5.7)
`QWebEnginePage::ViewSource` | `32` | Show the source of the current page in a new tab. Requires implementation of createWindow() or newWindowRequested(). (Added in Qt 5.8)
`QWebEnginePage::ToggleBold` | `33` | Toggles boldness for the selection or at the cursor position. Requires `contenteditable="true"`. (Added in Qt 5.10)
`QWebEnginePage::ToggleItalic` | `34` | Toggles italics for the selection or at the cursor position. Requires `contenteditable="true"`. (Added in Qt 5.10)
`QWebEnginePage::ToggleUnderline` | `35` | Toggles underlining of the selection or at the cursor position. Requires `contenteditable="true"`. (Added in Qt 5.10)
`QWebEnginePage::ToggleStrikethrough` | `36` | Toggles striking through the selection or at the cursor position. Requires `contenteditable="true"`. (Added in Qt 5.10)
`QWebEnginePage::AlignLeft` | `37` | Aligns the lines containing the selection or the cursor to the left. Requires `contenteditable="true"`. (Added in Qt 5.10)
`QWebEnginePage::AlignCenter` | `38` | Aligns the lines containing the selection or the cursor at the center. Requires `contenteditable="true"`. (Added in Qt 5.10)
`QWebEnginePage::AlignRight` | `39` | Aligns the lines containing the selection or the cursor to the right. Requires `contenteditable="true"`. (Added in Qt 5.10)
`QWebEnginePage::AlignJustified` | `40` | Stretches the lines containing the selection or the cursor so that each line has equal width. Requires `contenteditable="true"`. (Added in Qt 5.10)
`QWebEnginePage::Indent` | `41` | Indents the lines containing the selection or the cursor. Requires `contenteditable="true"`. (Added in Qt 5.10)
`QWebEnginePage::Outdent` | `42` | Outdents the lines containing the selection or the cursor. Requires `contenteditable="true"`. (Added in Qt 5.10)
`QWebEnginePage::InsertOrderedList` | `43` | Inserts an ordered list at the current cursor position, deleting the current selection. Requires `contenteditable="true"`. (Added in Qt 5.10)
`QWebEnginePage::InsertUnorderedList` | `44` | Inserts an unordered list at the current cursor position, deleting the current selection. Requires `contenteditable="true"`. (Added in Qt 5.10)

### enum QWebEnginePage::WebWindowType

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

Constant | Value | Description
--- | --- | ---
`QWebEnginePage::WebBrowserWindow` | `0` | A complete web browser window.
`QWebEnginePage::WebBrowserTab` | `1` | A web browser tab.
`QWebEnginePage::WebDialog` | `2` | A window without decoration.
`QWebEnginePage::WebBrowserBackgroundTab` | `3` | A web browser tab without hiding the current visible WebEngineView. (Added in Qt 5.7)

## 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

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)

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)

## 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, 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]` 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 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().

### 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]` void QWebEnginePage::featurePermissionRequestCanceled(const QUrl &securityOrigin, QWebEnginePage::Feature feature)

This signal is emitted when the web site identified by securityOrigin cancels a previously issued request to make use of feature.

See also featurePermissionRequested() and setFeaturePermission().

### `[signal]` void QWebEnginePage::featurePermissionRequested(const QUrl &securityOrigin, QWebEnginePage::Feature feature)

This signal is emitted when the web site identified by securityOrigin requests to make use of the resource or device identified by feature.

See also featurePermissionRequestCanceled() and setFeaturePermission().

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

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](bool found) {
             if (!found) 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.

### `[signal, since 6.2]` void QWebEnginePage::navigationRequested(QWebEngineNavigationRequest &request)

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().

### 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.

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::setFeaturePermission(const QUrl &securityOrigin, QWebEnginePage::Feature feature, QWebEnginePage::PermissionPolicy policy)

Sets the permission for the web site identified by securityOrigin to use feature to policy.

Note: This method is primarily for calling after a featurePermissionRequested() signal has been emitted to trigger the feature permission response. It can also be called before a request has been emitted, but will only set a granted permission for passive checks, mainly for Notification APIs that can check if permission has already been granted before explicitly requesting it.

See also featurePermissionRequested() and featurePermissionRequestCanceled().

### 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.

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.

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.

See also url().

### 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.