QWebView Class Reference

The QWebView class provides a widget that is used to view and edit web documents.QtWebKit. More...

#include <qwebview.h>

Collaboration diagram for QWebView:

Public Slots
void	stop ()
void	back ()
void	forward ()
void	reload ()
void	print (QPrinter *) const
Signals
void	loadStarted ()
void	loadProgress (int progress)
void	loadFinished (bool)
void	titleChanged (const QString &title)
void	statusBarMessage (const QString &text)
void	linkClicked (const QUrl &)
void	selectionChanged ()
void	iconChanged ()
void	urlChanged (const QUrl &)
Public Member Functions
	QWebView (QWidget *parent=0)
virtual	~QWebView ()
QWebPage *	page () const
void	setPage (QWebPage *page)
void	load (const QUrl &url)
void	load (const QNetworkRequest &request, QNetworkAccessManager::Operation operation=QNetworkAccessManager::GetOperation, const QByteArray &body=QByteArray())
void	setHtml (const QString &html, const QUrl &baseUrl=QUrl())
void	setContent (const QByteArray &data, const QString &mimeType=QString(), const QUrl &baseUrl=QUrl())
QWebHistory *	history () const
QWebSettings *	settings () const
QString	title () const
void	setUrl (const QUrl &url)
QUrl	url () const
QIcon	icon () const
QString	selectedText () const
QAction *	pageAction (QWebPage::WebAction action) const
void	triggerPageAction (QWebPage::WebAction action, bool checked=false)
bool	isModified () const
QVariant	inputMethodQuery (Qt::InputMethodQuery property) const
QSize	sizeHint () const
qreal	zoomFactor () const
void	setZoomFactor (qreal factor)
void	setTextSizeMultiplier (qreal factor)
qreal	textSizeMultiplier () const
QPainter::RenderHints	renderHints () const
void	setRenderHints (QPainter::RenderHints hints)
void	setRenderHint (QPainter::RenderHint hint, bool enabled=true)
bool	findText (const QString &subString, QWebPage::FindFlags options=0)
virtual bool	event (QEvent *)
void	setShowFPS (bool enabled=true)
Protected Member Functions
void	resizeEvent (QResizeEvent *)
void	paintEvent (QPaintEvent *)
virtual QWebView *	createWindow (QWebPage::WebWindowType type)
virtual void	changeEvent (QEvent *)
virtual void	mouseMoveEvent (QMouseEvent *)
virtual void	mousePressEvent (QMouseEvent *)
virtual void	mouseDoubleClickEvent (QMouseEvent *)
virtual void	mouseReleaseEvent (QMouseEvent *)
virtual void	contextMenuEvent (QContextMenuEvent *)
virtual void	wheelEvent (QWheelEvent *)
virtual void	keyPressEvent (QKeyEvent *)
virtual void	keyReleaseEvent (QKeyEvent *)
virtual void	dragEnterEvent (QDragEnterEvent *)
virtual void	dragLeaveEvent (QDragLeaveEvent *)
virtual void	dragMoveEvent (QDragMoveEvent *)
virtual void	dropEvent (QDropEvent *)
virtual void	focusInEvent (QFocusEvent *)
virtual void	focusOutEvent (QFocusEvent *)
virtual void	inputMethodEvent (QInputMethodEvent *)
virtual bool	focusNextPrevChild (bool next)
Properties
QString	title
	the title of the web page currently viewed
QUrl	url
	the url of the web page currently viewed
QIcon	icon
	the icon associated with the web page currently viewed
QString	selectedText
	the text currently selected
bool	modified
	whether the document was modified by the user
qreal	textSizeMultiplier
	the scaling factor for all text in the frame
qreal	zoomFactor
	the zoom factor for the view
QPainter::RenderHints	renderHints
	the default render hints for the view
Private Attributes
QWebViewPrivate *	d
int	frameCount
qreal	fps
QTime	FPSTime
bool	showFPS
QRect	FPSRect
Friends
class	QWebPage

Detailed Description

The QWebView class provides a widget that is used to view and edit web documents.

QtWebKit.

Since:: 4.4 QWebView is the main widget component of the QtWebKit web browsing module. It can be used in various applications to display web content live from the Internet.

The image below shows QWebView previewed in with a Nokia website.

A web site can be loaded onto QWebView with the load() function. Like all Qt widgets, the show() function must be invoked in order to display QWebView. The snippet below illustrates this:

webkitsnippets/simple/main.cpp Using QWebView

Alternatively, setUrl() can also 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. The loadProgress() signal, on the other hand, is emitted whenever an element of the web view completes loading, such as an embedded image, a script, etc. Finally, the loadFinished() signal is emitted when the view has loaded completely. It's argument - either true or false - indicates load success or failure.

The page() function returns a pointer to the web page object. See {Elements of QWebView} for an explanation of how the web page is related to the view. To modify your web view's settings, you can access the QWebSettings object with the settings() function. With QWebSettings, you can change the default fonts, enable or disable features such as JavaScript and plugins.

The title of an HTML document can be accessed with the title() property. Additionally, a web site may also specify an icon, which can be accessed using the icon() property. If the title or the icon changes, the corresponding titleChanged() and iconChanged() signals will be emitted. The textSizeMultiplier() property can be used to change the overall size of the text displayed in the web view.

If you require a custom context menu, you can implement it by reimplementing {QWidget::}{contextMenuEvent()} and populating your QMenu with the actions obtained from pageAction(). More functionality such as reloading the view, copying selected text to the clipboard, or pasting into the view, is also encapsulated within the QAction objects returned by pageAction(). These actions can be programmatically triggered using triggerPageAction(). Alternatively, the actions can be added to a toolbar or a menu directly. QWebView maintains the state of the returned actions but allows modification of action properties such as {QAction::}{text} or {QAction::}{icon}.

A QWebView can be printed onto a QPrinter using the print() function. This function is marked as a slot and can be conveniently connected to {QPrintPreviewDialog}'s {QPrintPreviewDialog::}{paintRequested()} signal.

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 QWebView and reimplement the createWindow() function.

Definition at line 50 of file qwebview.h.

Constructor & Destructor Documentation

QWebView::QWebView ( QWidget * parent = 0 ) [explicit]

Constructs an empty QWebView with parent parent.

See also:: load()

Definition at line 309 of file qwebview.cpp.

QWebView::~QWebView ( ) [virtual]

Destroys the web view.

Definition at line 360 of file qwebview.cpp.

References QWebPagePrivate::client, QWebPage::d, d, QWebViewPrivate::page, and QWebPagePrivate::view.

Member Function Documentation

void QWebView::back ( ) [slot]

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

webkitsnippets/qtwebkit_qwebview_snippet.cpp 4

See also:: forward(), pageAction()

Definition at line 897 of file qwebview.cpp.

References QWebPage::Back, d, QWebViewPrivate::page, and QWebPage::triggerAction().

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void QWebView::changeEvent ( QEvent * e ) [protected, virtual]

Definition at line 1198 of file qwebview.cpp.

References d, QWebViewPrivate::page, and QWebPage::setPalette().

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void QWebView::contextMenuEvent ( QContextMenuEvent * ev ) [protected, virtual]

Definition at line 1067 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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QWebView * QWebView::createWindow ( QWebPage::WebWindowType type ) [protected, virtual]

This function is called from the createWindow() method of the associated QWebPage, each time the page wants to create a new window of the given type. This might be the result, for example, of a JavaScript request to open a document in a new window.

Note:: If the createWindow() method of the associated page is reimplemented, this method is not called, unless explicitly done so in the reimplementation.

See also:: QWebPage::createWindow()

Definition at line 994 of file qwebview.cpp.

void QWebView::dragEnterEvent ( QDragEnterEvent * ev ) [protected, virtual]

Definition at line 1132 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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void QWebView::dragLeaveEvent ( QDragLeaveEvent * ev ) [protected, virtual]

Definition at line 1142 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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void QWebView::dragMoveEvent ( QDragMoveEvent * ev ) [protected, virtual]

Definition at line 1152 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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void QWebView::dropEvent ( QDropEvent * ev ) [protected, virtual]

Definition at line 1162 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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bool QWebView::event ( QEvent * e ) [virtual]

Definition at line 811 of file qwebview.cpp.

References QWebPagePrivate::client, QWebPage::d, d, QWebPage::event(), QWebViewPrivate::page, QWebPage::swallowContextMenuEvent(), and QWebPage::updatePositionDependentActions().

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bool QWebView::findText	(	const QString &	subString,
		QWebPage::FindFlags	options = `0`
	)

Finds the specified string, subString, in the page, using the given options.

If the HighlightAllOccurrences flag is passed, the function will highlight all occurrences that exist in the page. All subsequent calls will extend the highlight, rather than replace it, with occurrences of the new string.

If the HighlightAllOccurrences flag is not passed, the function will select an occurrence and all subsequent calls will replace the current occurrence with the next one.

To clear the selection, just pass an empty string.

Returns true if subString was found; otherwise returns false.

See also:: selectedText(), selectionChanged()

Definition at line 802 of file qwebview.cpp.

References d, QWebPage::findText(), and QWebViewPrivate::page.

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void QWebView::focusInEvent ( QFocusEvent * ev ) [protected, virtual]

Definition at line 1112 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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bool QWebView::focusNextPrevChild ( bool next ) [protected, virtual]

Definition at line 1172 of file qwebview.cpp.

References d, QWebPage::focusNextPrevChild(), and QWebViewPrivate::page.

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void QWebView::focusOutEvent ( QFocusEvent * ev ) [protected, virtual]

Definition at line 1122 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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void QWebView::forward ( ) [slot]

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

webkitsnippets/qtwebkit_qwebview_snippet.cpp 5

See also:: back(), pageAction()

Definition at line 913 of file qwebview.cpp.

References d, QWebPage::Forward, QWebViewPrivate::page, and QWebPage::triggerAction().

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QWebHistory * QWebView::history ( ) const

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

It is equivalent to

webkitsnippets/qtwebkit_qwebview_snippet.cpp 0

Definition at line 522 of file qwebview.cpp.

References QWebPage::history(), and page().

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QIcon QWebView::icon ( ) const

void QWebView::iconChanged ( ) [signal]

This signal is emitted whenever the icon of the page is loaded or changes.

In order for icons to be loaded, you will need to set an icon database path using QWebSettings::setIconDatabasePath().

See also:: icon(), QWebSettings::setIconDatabasePath()

void QWebView::inputMethodEvent ( QInputMethodEvent * e ) [protected, virtual]

Definition at line 1190 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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QVariant QWebView::inputMethodQuery ( Qt::InputMethodQuery property ) const

Definition at line 1181 of file qwebview.cpp.

References d, QWebPage::inputMethodQuery(), and QWebViewPrivate::page.

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bool QWebView::isModified ( ) const

Definition at line 642 of file qwebview.cpp.

References d, QWebPage::isModified(), and QWebViewPrivate::page.

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void QWebView::keyPressEvent ( QKeyEvent * ev ) [protected, virtual]

Definition at line 1092 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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void QWebView::keyReleaseEvent ( QKeyEvent * ev ) [protected, virtual]

Definition at line 1102 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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void QWebView::linkClicked ( const QUrl & url ) [signal]

This signal is emitted whenever the user clicks on a link and the page's linkDelegationPolicy property is set to delegate the link handling for the specified url.

See also:: QWebPage::linkDelegationPolicy()

void QWebView::load	(	const QNetworkRequest &	request,
		QNetworkAccessManager::Operation	operation = `QNetworkAccessManager::GetOperation`,
		const QByteArray &	body = `QByteArray()`
	)

Loads a network request, request, using the method specified in operation.

body is optional and is only used for POST operations.

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

See also:: url(), urlChanged()

Definition at line 471 of file qwebview.cpp.

References QWebFrame::load(), QWebPage::mainFrame(), and page().

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void QWebView::load ( const QUrl & url )

Loads the specified url and displays it.

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

See also:: setUrl(), url(), urlChanged(), QUrl::fromUserInput()

Definition at line 454 of file qwebview.cpp.

References QWebFrame::load(), QWebPage::mainFrame(), and page().

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

This signal is emitted when a load of the page is finished. ok will indicate whether the load was successful or any error occurred.

See also:: loadStarted()

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

This signal is emitted every time an element in the web page completes loading and the overall loading progress advances.

This signal tracks the progress of all child frames.

The current value is provided by progress and scales from 0 to 100, which is the default range of QProgressBar.

See also:: loadStarted(), loadFinished()

void QWebView::loadStarted ( ) [signal]

This signal is emitted when a new load of the page is started.

See also:: loadProgress(), loadFinished()

void QWebView::mouseDoubleClickEvent ( QMouseEvent * ev ) [protected, virtual]

Definition at line 1034 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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void QWebView::mouseMoveEvent ( QMouseEvent * ev ) [protected, virtual]

Definition at line 1002 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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void QWebView::mousePressEvent ( QMouseEvent * ev ) [protected, virtual]

Definition at line 1018 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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void QWebView::mouseReleaseEvent ( QMouseEvent * ev ) [protected, virtual]

Definition at line 1050 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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QWebPage * QWebView::page ( ) const

Returns a pointer to the underlying web page.

See also:: setPage()

Definition at line 382 of file qwebview.cpp.

References d, QWebViewPrivate::page, QWebPage, and setPage().

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QAction * QWebView::pageAction ( QWebPage::WebAction action ) const

Returns a pointer to a QAction that encapsulates the specified web action action.

Definition at line 612 of file qwebview.cpp.

References QWebPage::action(), and page().

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void QWebView::paintEvent ( QPaintEvent * ev ) [protected]

Definition at line 940 of file qwebview.cpp.

References d, fps, FPSRect, FPSTime, frameCount, QWebPage::mainFrame(), QWebViewPrivate::page, QWebFrame::render(), QWebViewPrivate::renderHints, and showFPS.

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void QWebView::print ( QPrinter * printer ) const [slot]

Prints the main frame to the given printer.

See also:: QWebFrame::print(), QPrintPreviewDialog

Definition at line 865 of file qwebview.cpp.

References QWebPage::mainFrame(), page(), and QWebFrame::print().

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void QWebView::reload ( ) [slot]

Reloads the current document.

See also:: stop(), pageAction(), loadStarted()

Definition at line 924 of file qwebview.cpp.

References d, QWebViewPrivate::page, QWebPage::Reload, and QWebPage::triggerAction().

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QPainter::RenderHints QWebView::renderHints ( ) const

void QWebView::resizeEvent ( QResizeEvent * e ) [protected]

Definition at line 932 of file qwebview.cpp.

References d, QWebViewPrivate::page, and QWebPage::setViewportSize().

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QString QWebView::selectedText ( ) const

void QWebView::selectionChanged ( ) [signal]

This signal is emitted whenever the selection changes.

See also:: selectedText()

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

Sets the content of the web view to the specified content data. If the mimeType argument is empty it is currently assumed that the content is HTML but in future versions we may introduce auto-detection.

External objects referenced in the content are located relative to baseUrl.

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

See also:: load(), setHtml(), QWebFrame::toHtml()

Definition at line 510 of file qwebview.cpp.

References QWebPage::mainFrame(), page(), and QWebFrame::setContent().

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

Sets the content of the web view to the specified html.

External objects such as stylesheets or images referenced in the HTML document are located relative to baseUrl.

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

When using this method, WebKit 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 also be specified by the web server.

See also:: load(), setContent(), QWebFrame::toHtml()

Definition at line 494 of file qwebview.cpp.

References QWebPage::mainFrame(), page(), and QWebFrame::setHtml().

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void QWebView::setPage ( QWebPage * page )

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 document is a child of the web view, it will be deleted.

See also:: page()

Definition at line 400 of file qwebview.cpp.

References QWebPagePrivate::client, QWebPage::d, d, iconChanged(), linkClicked(), loadFinished(), loadProgress(), loadStarted(), QWebPage::mainFrame(), QWebPagePrivate::page, QWebViewPrivate::page, QWebPage::setPalette(), QWebPage::setView(), statusBarMessage(), titleChanged(), and urlChanged().

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void QWebView::setRenderHint	(	QPainter::RenderHint	hint,
		bool	enabled = `true`
	)

Since:: 4.6 If enabled is true, enables the specified render hint; otherwise disables it.

See also:: renderHints, QPainter::renderHints()

Definition at line 774 of file qwebview.cpp.

References d, and QWebViewPrivate::renderHints.

void QWebView::setRenderHints ( QPainter::RenderHints hints )

Since:: 4.6 Sets the render hints used by the view to the specified hints.

See also:: QPainter::setRenderHints()

Definition at line 759 of file qwebview.cpp.

References d, and QWebViewPrivate::renderHints.

void QWebView::setShowFPS ( bool enabled = true ) [inline]

Definition at line 117 of file qwebview.h.

void QWebView::setTextSizeMultiplier ( qreal factor )

Sets the value of the multiplier used to scale the text in a Web page to the factor specified.

Definition at line 714 of file qwebview.cpp.

References QWebPage::mainFrame(), page(), and QWebFrame::setTextSizeMultiplier().

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QWebSettings * QWebView::settings ( ) const

Returns a pointer to the view/page specific settings object.

It is equivalent to

webkitsnippets/qtwebkit_qwebview_snippet.cpp 1

See also:: QWebSettings::globalSettings()

Definition at line 536 of file qwebview.cpp.

References page(), and QWebPage::settings().

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void QWebView::setUrl ( const QUrl & url )

Definition at line 567 of file qwebview.cpp.

References QWebPage::mainFrame(), page(), and QWebFrame::setUrl().

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void QWebView::setZoomFactor ( qreal factor )

Definition at line 686 of file qwebview.cpp.

References QWebPage::mainFrame(), page(), and QWebFrame::setZoomFactor().

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QSize QWebView::sizeHint ( ) const

Definition at line 675 of file qwebview.cpp.

void QWebView::statusBarMessage ( const QString & text ) [signal]

This signal is emitted when the status bar text is changed by the page.

void QWebView::stop ( ) [slot]

Convenience slot that stops loading the document.

It is equivalent to

webkitsnippets/qtwebkit_qwebview_snippet.cpp 3

See also:: reload(), pageAction(), loadFinished()

Definition at line 881 of file qwebview.cpp.

References d, QWebViewPrivate::page, QWebPage::Stop, and QWebPage::triggerAction().

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qreal QWebView::textSizeMultiplier ( ) const

QString QWebView::title ( ) const

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

This signal is emitted whenever the title of the main frame changes.

See also:: title()

void QWebView::triggerPageAction	(	QWebPage::WebAction	action,
		bool	checked = `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.

webkitsnippets/qtwebkit_qwebview_snippet.cpp 2

See also:: pageAction()

Definition at line 628 of file qwebview.cpp.

References page(), and QWebPage::triggerAction().

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QUrl QWebView::url ( ) const

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

This signal is emitted when the url of the view changes.

See also:: url(), load()

void QWebView::wheelEvent ( QWheelEvent * ev ) [protected, virtual]

Definition at line 1080 of file qwebview.cpp.

References d, QWebPage::event(), and QWebViewPrivate::page.

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qreal QWebView::zoomFactor ( ) const

Friends And Related Function Documentation

friend class QWebPage [friend]

Definition at line 178 of file qwebview.h.

Member Data Documentation

QWebViewPrivate* QWebView::d [private]

Definition at line 179 of file qwebview.h.

qreal QWebView::fps [private]

Definition at line 183 of file qwebview.h.

QRect QWebView::FPSRect [private]

Definition at line 186 of file qwebview.h.

QTime QWebView::FPSTime [private]

Definition at line 184 of file qwebview.h.

int QWebView::frameCount [private]

Definition at line 182 of file qwebview.h.

bool QWebView::showFPS [private]

Definition at line 185 of file qwebview.h.

Property Documentation

QIcon QWebView::icon [read]

the icon associated with the web page currently viewed

By default, this property contains a null icon.

See also:: iconChanged(), QWebSettings::iconForUrl()

Definition at line 55 of file qwebview.h.

QWebView::modified [read]

whether the document was modified by the user

Parts of HTML documents can be editable for example through the {contenteditable} attribute on HTML elements.

By default, this property is false.

Definition at line 57 of file qwebview.h.

QPainter::RenderHints QWebView::renderHints [read, write]

the default render hints for the view

Since:: 4.6 These hints are used to initialize QPainter before painting the Web page.

QPainter::TextAntialiasing is enabled by default.

Note:: This property is not available on Symbian. However, the getter and setter functions can still be used directly.

See also:: QPainter::renderHints()

Since:: 4.6 Returns the render hints used by the view to render content.

See also:: QPainter::renderHints()

Definition at line 62 of file qwebview.h.

QString QWebView::selectedText [read]

the text currently selected

By default, this property contains an empty string.

See also:: findText(), selectionChanged()

Definition at line 56 of file qwebview.h.

qreal QWebView::textSizeMultiplier [read, write]

the scaling factor for all text in the frame

Use setZoomFactor instead, in combination with the ZoomTextOnly attribute in QWebSettings.

Note:: Setting this property also enables the ZoomTextOnly attribute in QWebSettings.

By default, this property contains a value of 1.0.

Returns the value of the multiplier used to scale the text in a Web page.

Definition at line 59 of file qwebview.h.

QString QWebView::title [read]

the title of the web page currently viewed

By default, this property contains an empty string.

See also:: titleChanged()

Definition at line 53 of file qwebview.h.

QUrl QWebView::url [read, write]

the url of the web page currently viewed

Setting this property clears the view and loads the URL.

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

See also:: load(), urlChanged()

Definition at line 54 of file qwebview.h.

qreal QWebView::zoomFactor [read, write]

the zoom factor for the view

Since:: 4.5

Definition at line 60 of file qwebview.h.

The documentation for this class was generated from the following files:

QWebView Class Reference

Public Slots

Signals

Public Member Functions

Protected Member Functions

Properties

Private Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation

Property Documentation