QWebEngineView — PyQt Documentation v6.9.0 (original) (raw)
PyQt6.QtWebEngineWidgets.QWebEngineView
Inherits from QWidget.
Description¶
The QWebEngineView class provides a widget that is used to view and edit web documents.
A web view is the main widget component of the Qt WebEngine web browsing module. It can be used in various applications to display web content live from the Internet.
A web site can be loaded to a web view with the load() function. The GET method is always used to load URLs.
Like all Qt widgets, the show() function must be invoked in order to display the web view. The snippet below illustrates this:
QWebEngineView *view = new QWebEngineView(parent);
view->load(QUrl("http://qt-project.org/"));
view->show();
Alternatively, setUrl() can be used to load a web site. If you have the HTML content readily available, you can use setHtml() instead.
The loadStarted signal is emitted when the view begins loading and the loadProgress signal is emitted whenever an element of the web view completes loading, such as an embedded image or a script. The loadFinished signal is emitted when the view has been loaded completely. Its argument, either true or false, indicates whether loading was successful or failed.
The page() function returns a pointer to a web page object. A QWebEngineView contains a QWebEnginePage, which in turn allows access to the QWebEngineHistory in the page’s context.
The title of an HTML document can be accessed with the title() property. Additionally, a web site may 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 widget features a context menu that is tailored to the element at hand, and includes actions useful in a browser. For a custom context menu, or for embedding actions in a menu or toolbar, the individual actions are available via pageAction(). The web view maintains the state of the returned actions, but allows modification of action properties such as text() or icon(). The action semantics can also be triggered directly through triggerPageAction().
If you want to provide support for web sites that allow the user to open new windows, such as pop-up windows, you can subclass QWebEngineView and reimplement the createWindow() function.
Methods¶
__init__(parent: QWidget = None)
Constructs an empty web view with the parent parent.
__init__(QWebEnginePage, parent: QWidget = None)
Constructs a web view containing page with the parent parent.
Note: Ownership of page is not taken, and it is up to the caller to ensure it is deleted.
See also
__init__(QWebEngineProfile, parent: QWidget = None)
Constructs an empty web view using profile with the parent parent.
Note: The profile object ownership is not taken and it should outlive the view.
back()
Convenience slot that loads the previous document in the list of documents built by navigating links. Does nothing if there is no previous document.
It is equivalent to:
view->page()->triggerAction(QWebEnginePage::Back);
See also
closeEvent(QCloseEvent)
TODO
TODO
createStandardContextMenu() → QMenu
Creates a standard context menu and returns a pointer to it.
createWindow(WebWindowType) → QWebEngineView
This function is called from the createWindow() method of the associated QWebEnginePage each time the page wants to create a new window of the given type. For example, when a JavaScript request to open a document in a new window is issued.
Note: If the createWindow() method of the associated page is reimplemented, this method is not called, unless explicitly done so in the reimplementation.
dragEnterEvent(QDragEnterEvent)
TODO
dragLeaveEvent(QDragLeaveEvent)
TODO
dragMoveEvent(QDragMoveEvent)
TODO
dropEvent(QDropEvent)
TODO
event(QEvent) → bool
TODO
findText(Optional[str], options: FindFlag = {}, resultCallback: Callable[[bool], None] = None)
TODO
@staticmethod
forPage(QWebEnginePage) → QWebEngineView
Returns the view if any, associated with the page.
See also
forward()
Convenience slot that loads the next document in the list of documents built by navigating links. Does nothing if there is no next document.
It is equivalent to:
view->page()->triggerAction(QWebEnginePage::Forward);
See also
hasSelection() → bool
TODO
hideEvent(QHideEvent)
TODO
history() → QWebEngineHistory
Returns a pointer to the view’s history of navigated web pages.
It is equivalent to:
view->page()->history();
icon() → QIcon
TODO
iconUrl() → QUrl
TODO
Returns additional data about the current context menu. It is only guaranteed to be valid during the call to the contextMenuEvent().
load(QUrl)
Loads the specified url and displays it.
Note: The view remains the same until enough data has arrived to display the new URL.
load(QWebEngineHttpRequest)
Issues the specified request and loads the response.
page() → QWebEnginePage
Returns a pointer to the underlying web page.
pageAction(WebAction) → QAction
Returns a pointer to a QAction that encapsulates the specified web action action. This function will also set a default styled icon to the QAction if it lacks one.
print(QPrinter)
Renders the current content of the page into a temporary PDF document, then prints it using printer.
The settings for creating and printing the PDF document will be retrieved from the printer object.
When finished the signal printFinished is emitted with the true for success or false for failure.
It is the users responsibility to ensure the printer remains valid until printFinished has been emitted.
Note: Printing runs on the browser process, which is by default not sandboxed.
Note: The data generation step of printing can be interrupted for a short period of time using the Stop web action.
Note: This function rasterizes the result when rendering onto printer. Please consider raising the default resolution of printer to at least 300 DPI or using printToPdf() to produce PDF file output more effectively.
printToPdf(Optional[str], pageLayout: QPageLayout = QPageLayout(QPageSize(QPageSize.A4),QPageLayout.Portrait,QMarginsF()), ranges: QPageRanges = {})
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.
If a file already exists at the provided file path, it will be overwritten.
See also
printToPdf(Callable[[Union[QByteArray, bytes, bytearray, memoryview]], None], pageLayout: QPageLayout = QPageLayout(QPageSize(QPageSize.A4),QPageLayout.Portrait,QMarginsF()), ranges: QPageRanges = {})
TODO
reload()
Reloads the current document.
selectedText() → str
TODO
setContent(Union[QByteArray, bytes, bytearray, memoryview], mimeType: Optional[str] = '', baseUrl: QUrl = QUrl())
Sets the content of the web view 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 to be loaded, baseUrl cannot be empty.
The data is loaded immediately; external objects are loaded asynchronously.
setHtml(Optional[str], baseUrl: QUrl = QUrl())
Sets the content of the web view to the specified html content.
baseUrl is optional and used to resolve relative URLs in the document, such as referenced images or stylesheets. For example, if html is retrieved from http://www.example.com/documents/overview.html, which is the base URL, then an image referenced with the relative URL, diagram.png, should be at http://www.example.com/documents/diagram.png.
The HTML document is loaded immediately, whereas external objects are loaded asynchronously.
When using this method, Qt WebEngine 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. Alternatively, the encoding can be specified by the web server.
This is a convenience function equivalent to setContent(html, "text/html;charset=UTF-8", baseUrl).
Warning: This function works only for HTML. For other MIME types (such as XHTML or SVG), setContent() should be used instead.
Note: Content larger than 2 MB cannot be displayed, because setHtml() converts the provided HTML to percent-encoding and places data: in front of it to create the URL that it navigates to. Thereby, the provided code becomes a URL that exceeds the 2 MB limit set by Chromium. If the content is too large, the loadFinished signal is triggered with success=false.
setPage(QWebEnginePage)
Makes page the new web page of the web view.
The parent QObject of the provided page remains the owner of the object. If the current page is a child of the web view, it will be deleted.
settings() → QWebEngineSettings
Returns a pointer to the view or page specific settings object.
It is equivalent to:
view->page()->settings();
setUrl(QUrl)
setZoomFactor(float)
showEvent(QShowEvent)
TODO
sizeHint() → QSize
TODO
stop()
Convenience slot that stops loading the document.
It is equivalent to:
view->page()->triggerAction(QWebEnginePage::Stop);
title() → str
TODO
triggerPageAction(WebAction, checked: bool = False)
Triggers the specified action. If it is a checkable action, the specified checked state is assumed.
The following example triggers the copy action and therefore copies any selected text to the clipboard.
view->triggerPageAction(QWebEnginePage::Copy);
url() → QUrl
zoomFactor() → float
See also
Signals¶
iconChanged(QIcon)
This signal is emitted when the icon (“favicon”) associated with the view is changed. The new icon is specified by icon.
iconUrlChanged(QUrl)
This signal is emitted when the URL of the icon (“favicon”) associated with the view is changed. The new URL is specified by url.
See also
iconUrl(), icon(), iconChanged.
loadFinished(bool)
This signal is emitted when a load of the page has finished. ok will indicate whether the load was successful or an error occurred.
loadProgress(int)
This signal is emitted every time an element in the web view completes loading, such as an embedded image or a script. Therefore, it tracks the collective progress of loading the web view.
The current value is provided by progress and scales from 0 to 100, which is the default range of QProgressBar.
See also
loadStarted()
This signal is emitted when a new load of the page is started.
See also
pdfPrintingFinished(Optional[str], bool)
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.
printFinished(bool)
This signal is emitted when printing requested with print() has finished. The parameter success is true for success or false for failure.
printRequested()
This signal is emitted when the JavaScript window.print() method is called or the user pressed the print button of PDF viewer plugin. Typically, the signal handler can simply call print().
Since 6.8, this signal is only emitted for the main frame, instead of being emitted for any frame that requests printing.
printRequestedByFrame(QWebEngineFrame)
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.
See also
renderProcessTerminated(RenderProcessTerminationStatus, int)
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.
selectionChanged()
This signal is emitted whenever the selection changes.
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.
titleChanged(Optional[str])
This signal is emitted whenever the title of the view changes.
urlChanged(QUrl)
This signal is emitted when the url of the view changes.