KParts::ReadOnlyPart Class Reference

#include <KParts/ReadOnlyPart>

Inheritance diagram for KParts::ReadOnlyPart:

Properties
QUrl	url
Properties inherited from QObject
	objectName

Signals
void	canceled (const QString &errMsg)
void	completed ()
void	completedWithPendingAction ()
void	started (KIO::Job *job)
void	urlChanged (const QUrl &url)
Signals inherited from KParts::Part
void	setStatusBarText (const QString &text)
void	setWindowCaption (const QString &caption)

Public Slots
virtual bool	openUrl (const QUrl &url)

Public Member Functions
	ReadOnlyPart (QObject *parent=nullptr, const KPluginMetaData &data={})
	~ReadOnlyPart () override
OpenUrlArguments	arguments () const
bool	closeStream ()
virtual bool	closeUrl ()
bool	isProgressInfoEnabled () const
NavigationExtension *	navigationExtension () const
bool	openStream (const QString &mimeType, const QUrl &url)
void	setArguments (const OpenUrlArguments &arguments)
void	setProgressInfoEnabled (bool show)
QUrl	url () const
bool	writeStream (const QByteArray &data)
Public Member Functions inherited from KParts::Part
	Part (QObject *parent=nullptr, const KPluginMetaData &data={})
	~Part () override
virtual Part *	hitTest (QWidget *widget, const QPoint &globalPos)
PartManager *	manager () const
KPluginMetaData	metaData () const
void	setAutoDeletePart (bool autoDeletePart)
void	setAutoDeleteWidget (bool autoDeleteWidget)
virtual void	setManager (PartManager *manager)
virtual QWidget *	widget ()
Public Member Functions inherited from QObject
	QObject (QObject *parent)
QBindable< QString >	bindableObjectName ()
bool	blockSignals (bool block)
const QObjectList &	children () const const
QMetaObject::Connection	connect (const QObject *sender, const char *signal, const char *method, Qt::ConnectionType type) const const
void	deleteLater ()
void	destroyed (QObject *obj)
bool	disconnect (const char *signal, const QObject *receiver, const char *method) const const
bool	disconnect (const QObject *receiver, const char *method) const const
void	dumpObjectInfo () const const
void	dumpObjectTree () const const
QList< QByteArray >	dynamicPropertyNames () const const
virtual bool	event (QEvent *e)
virtual bool	eventFilter (QObject *watched, QEvent *event)
T	findChild (const QString &name, Qt::FindChildOptions options) const const
QList< T >	findChildren (const QRegularExpression &re, Qt::FindChildOptions options) const const
QList< T >	findChildren (const QString &name, Qt::FindChildOptions options) const const
QList< T >	findChildren (Qt::FindChildOptions options) const const
bool	inherits (const char *className) const const
void	installEventFilter (QObject *filterObj)
bool	isQuickItemType () const const
bool	isWidgetType () const const
bool	isWindowType () const const
void	killTimer (int id)
virtual const QMetaObject *	metaObject () const const
void	moveToThread (QThread *targetThread)
QString	objectName () const const
void	objectNameChanged (const QString &objectName)
QObject *	parent () const const
QVariant	property (const char *name) const const
	Q_CLASSINFO (Name, Value)
	Q_EMIT Q_EMIT
	Q_ENUM (...)
	Q_ENUM_NS (...)
	Q_ENUMS (...)
	Q_FLAG (...)
	Q_FLAG_NS (...)
	Q_FLAGS (...)
	Q_GADGET Q_GADGET
	Q_GADGET_EXPORT (EXPORT_MACRO)
	Q_INTERFACES (...)
	Q_INVOKABLE Q_INVOKABLE
	Q_MOC_INCLUDE Q_MOC_INCLUDE
	Q_NAMESPACE Q_NAMESPACE
	Q_NAMESPACE_EXPORT (EXPORT_MACRO)
	Q_OBJECT Q_OBJECT
	Q_PROPERTY (...)
	Q_REVISION Q_REVISION
	Q_SET_OBJECT_NAME (Object)
	Q_SIGNAL Q_SIGNAL
	Q_SIGNALS Q_SIGNALS
	Q_SLOT Q_SLOT
	Q_SLOTS Q_SLOTS
T	qobject_cast (const QObject *object)
T	qobject_cast (QObject *object)
	QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT
void	removeEventFilter (QObject *obj)
void	setObjectName (const QString &name)
void	setObjectName (QAnyStringView name)
void	setParent (QObject *parent)
bool	setProperty (const char *name, const QVariant &value)
bool	setProperty (const char *name, QVariant &&value)
bool	signalsBlocked () const const
int	startTimer (int interval, Qt::TimerType timerType)
int	startTimer (std::chrono::milliseconds interval, Qt::TimerType timerType)
QThread *	thread () const const
Public Member Functions inherited from KParts::PartBase
	PartBase ()
	~PartBase () override
QObject *	partObject () const
void	setPartObject (QObject *object)
Public Member Functions inherited from KXMLGUIClient
	KXMLGUIClient (KXMLGUIClient *parent)
virtual QAction *	action (const QDomElement &element) const
QAction *	action (const QString &name) const
virtual KActionCollection *	actionCollection () const
QList< KXMLGUIClient * >	childClients ()
KXMLGUIBuilder *	clientBuilder () const
virtual QString	componentName () const
virtual QDomDocument	domDocument () const
KXMLGUIFactory *	factory () const
void	insertChildClient (KXMLGUIClient *child)
KXMLGUIClient *	parentClient () const
void	plugActionList (const QString &name, const QList< QAction * > &actionList)
void	reloadXML ()
void	removeChildClient (KXMLGUIClient *child)
void	replaceXMLFile (const QString &xmlfile, const QString &localxmlfile, bool merge=false)
void	setClientBuilder (KXMLGUIBuilder *builder)
void	setFactory (KXMLGUIFactory *factory)
void	setXMLGUIBuildDocument (const QDomDocument &doc)
void	unplugActionList (const QString &name)
virtual QString	xmlFile () const
QDomDocument	xmlguiBuildDocument () const

Protected Member Functions
KPARTS_NO_EXPORT	ReadOnlyPart (ReadOnlyPartPrivate &dd, QObject *parent)
void	abortLoad ()
virtual bool	doCloseStream ()
virtual bool	doOpenStream (const QString &mimeType)
virtual bool	doWriteStream (const QByteArray &data)
void	guiActivateEvent (GUIActivateEvent *event) override
QString	localFilePath () const
virtual bool	openFile ()
void	setLocalFilePath (const QString &localFilePath)
void	setUrl (const QUrl &url)
Protected Member Functions inherited from KParts::Part
KPARTS_NO_EXPORT	Part (PartPrivate &dd, QObject *parent)
void	customEvent (QEvent *event) override
QWidget *	hostContainer (const QString &containerName)
virtual void	partActivateEvent (PartActivateEvent *event)
virtual void	setWidget (QWidget *widget)
Protected Member Functions inherited from QObject
virtual void	childEvent (QChildEvent *event)
virtual void	connectNotify (const QMetaMethod &signal)
virtual void	disconnectNotify (const QMetaMethod &signal)
bool	isSignalConnected (const QMetaMethod &signal) const const
int	receivers (const char *signal) const const
QObject *	sender () const const
int	senderSignalIndex () const const
virtual void	timerEvent (QTimerEvent *event)
Protected Member Functions inherited from KParts::PartBase
KPARTS_NO_EXPORT	PartBase (PartBasePrivate &dd)
Protected Member Functions inherited from KXMLGUIClient
void	loadStandardsXmlFile ()
virtual void	setComponentName (const QString &componentName, const QString &componentDisplayName)
virtual void	setDOMDocument (const QDomDocument &document, bool merge=false)
virtual void	setLocalXMLFile (const QString &file)
virtual void	setXML (const QString &document, bool merge=false)
virtual void	setXMLFile (const QString &file, bool merge=false, bool setXMLDoc=true)
virtual void	stateChanged (const QString &newstate, ReverseStateChange reverse=StateNoReverse)

Additional Inherited Members
Static Public Member Functions inherited from QObject
QMetaObject::Connection	connect (const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, const QObject *context, Functor functor, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)
bool	disconnect (const QMetaObject::Connection &connection)
bool	disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *method)
bool	disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method)
bool	disconnect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method)
QString	tr (const char *sourceText, const char *disambiguation, int n)
Static Public Member Functions inherited from KXMLGUIClient
static QString	findVersionNumber (const QString &xml)
Public Attributes inherited from QObject
typedef	QObjectList
Protected Slots inherited from KParts::Part
void	slotWidgetDestroyed ()
Static Protected Member Functions inherited from KXMLGUIClient
static QString	standardsXmlFileLocation ()
Protected Attributes inherited from KParts::PartBase
std::unique_ptr< PartBasePrivate > const	d_ptr

Detailed Description

Base class for any "viewer" part.

This class takes care of network transparency for you, in the simplest way (downloading to a temporary file, then letting the part load from the temporary file). To use the built-in network transparency, you only need to implement openFile(), not openUrl().

To implement network transparency differently (e.g. for progressive loading, like a web browser does for instance), or to prevent network transparency (but why would you do that?), you can override openUrl().

An application using KParts can use the signals to show feedback while the URL is being loaded.

ReadOnlyPart handles the window caption by setting it to the current URL (set in openUrl(), and each time the part is activated). If you want another caption, set it in openFile() and, if the part might ever be used with a part manager, in guiActivateEvent().

Definition at line 51 of file readonlypart.h.

Property Documentation

url

QUrl KParts::ReadOnlyPart::url

read

Definition at line 55 of file readonlypart.h.

Constructor & Destructor Documentation

ReadOnlyPart() [1/2]

ReadOnlyPart::ReadOnlyPart ( QObject * parent = nullptr, const KPluginMetaData & data = {} )

explicit

Constructor.

See also Part for the setXXX methods to call.

Definition at line 29 of file readonlypart.cpp.

~ReadOnlyPart()

ReadOnlyPart::~ReadOnlyPart ( )

override

Destructor.

Definition at line 39 of file readonlypart.cpp.

ReadOnlyPart() [2/2]

ReadOnlyPart::ReadOnlyPart ( ReadOnlyPartPrivate & dd, QObject * parent )

protected

Definition at line 34 of file readonlypart.cpp.

Member Function Documentation

abortLoad()

void ReadOnlyPart::abortLoad ( )

protected

Definition at line 200 of file readonlypart.cpp.

arguments()

OpenUrlArguments KParts::ReadOnlyPart::arguments

(

)

const

Returns

the arguments that were used to open this URL.

Definition at line 335 of file readonlypart.cpp.

canceled

void KParts::ReadOnlyPart::canceled ( const QString & errMsg )

signal

Emit this if loading is canceled by the user or by an error.

Parameters

errMsg

the error message, empty if the user canceled the loading voluntarily.

closeStream()

bool ReadOnlyPart::closeStream

(

)

Terminate the sending of data to the part.

With some data types (text, html...) closeStream might never actually be called, in the case of continuous streams, for instance plain text or HTML data.

Definition at line 318 of file readonlypart.cpp.

closeUrl()

bool ReadOnlyPart::closeUrl ( )

virtual

Called when closing the current URL (for example, a document), for instance when switching to another URL (note that openUrl() calls it automatically in this case).

If the current URL is not fully loaded yet, aborts loading. Deletes the temporary file used when the URL is remote. Resets the current url() to QUrl().

Returns

always true, but the return value exists for reimplementations

Reimplemented in KParts::ReadWritePart.

Definition at line 216 of file readonlypart.cpp.

completed

void KParts::ReadOnlyPart::completed ( )

signal

Emit this when you have completed loading data.

Hosting applications will want to know when the process of loading the data is finished, so that they can access the data when everything is loaded.

completedWithPendingAction

void KParts::ReadOnlyPart::completedWithPendingAction ( )

signal

This signal is similar to the KParts::ReadOnlyPart::completed() signal except it is only emitted if there is still a pending action to be executed on a delayed timer.

An example of this is the meta-refresh tags on web pages used to reload/redirect after a certain period of time. This signal is useful if you want to give the user the ability to cancel such pending actions.

Since

5.81

doCloseStream()

virtual bool KParts::ReadOnlyPart::doCloseStream ( )

inlineprotectedvirtual

This is called by closeStream(), to indicate that all the data has been sent.

Parts should ensure that all of the data is displayed at this point.

Returns

whether the data could be displayed correctly.

Definition at line 201 of file readonlypart.h.

doOpenStream()

virtual bool KParts::ReadOnlyPart::doOpenStream ( const QString & mimeType )

inlineprotectedvirtual

Called by openStream to initiate sending of data.

Parts which implement progress loading should check the mimeType parameter, and return true if they can accept a data stream of that type.

Definition at line 180 of file readonlypart.h.

doWriteStream()

virtual bool KParts::ReadOnlyPart::doWriteStream ( const QByteArray & data )

inlineprotectedvirtual

Receive some data from the hosting application.

In this method the part should attempt to display the data progressively. With some data types (text, html...) closeStream might never actually be called, in the case of continuous streams. This can't happen with e.g. images.

Definition at line 191 of file readonlypart.h.

guiActivateEvent()

void ReadOnlyPart::guiActivateEvent ( GUIActivateEvent * event )

overrideprotectedvirtual

Reimplemented from Part, so that the window caption is set to the current URL (decoded) when the part is activated.

This is the usual behavior in 99% of applications. Reimplement if you don't like it - test for event->activated()!

Note

This is done with GUIActivateEvent and not with PartActivateEvent because it's handled by the main window (which gets the event after the PartActivateEvent events have been sent).

Reimplemented from KParts::Part.

Definition at line 286 of file readonlypart.cpp.

isProgressInfoEnabled()

bool ReadOnlyPart::isProgressInfoEnabled

(

)

const

Returns whether the part shows the progress info dialog used by the internal KIO job.

Definition at line 86 of file readonlypart.cpp.

localFilePath()

QString ReadOnlyPart::localFilePath ( ) const

protected

Returns the local file path associated with this part.

Note

The result will only be valid if openUrl() or setLocalFilePath() has previously been called.

Definition at line 65 of file readonlypart.cpp.

navigationExtension()

NavigationExtension * ReadOnlyPart::navigationExtension

(

)

const

This convenience method returns the NavigationExtension for this part, or nullptr if there isn't one.

Definition at line 323 of file readonlypart.cpp.

openFile()

bool ReadOnlyPart::openFile ( )

protectedvirtual

If the part uses the standard implementation of openUrl(), it must reimplement this to open the local file.

The default implementation simply returns false.

If this method returns true the part emits completed(), otherwise it emits canceled().

See also

completed(), canceled()

Definition at line 134 of file readonlypart.cpp.

openStream()

bool ReadOnlyPart::openStream	(	const QString &	mimeType,
		const QUrl &	url )

Initiate sending data to this part.

This is an alternative to openUrl(), which allows the user of the part to load the data itself, and send it progressively to the part.

Parameters

mimeType	the type of data that is going to be sent to this part.
url	the URL representing this data. Although not directly used, every ReadOnlyPart has a URL (see url()), so this simply sets it.

Returns

true if the part supports progressive loading and accepts data, false otherwise.

Definition at line 300 of file readonlypart.cpp.

openUrl

bool ReadOnlyPart::openUrl ( const QUrl & url )

virtualslot

Only reimplement this if you don't want the network transparency support to download from the URL into a temporary file (when the URL isn't local).

Otherwise, reimplement openFile() only.

If you reimplement it, don't forget to set the caption, usually with

Q_EMIT setWindowCaption( url.toDisplayString() );

and also, if the URL refers to a local file, resolve it to a local path and call setLocalFilePath().

Definition at line 93 of file readonlypart.cpp.

setArguments()

void KParts::ReadOnlyPart::setArguments

(

const OpenUrlArguments &

arguments

)

Sets the arguments to use for the next openUrl() call.

Definition at line 328 of file readonlypart.cpp.

setLocalFilePath()

void ReadOnlyPart::setLocalFilePath ( const QString & localFilePath )

protected

Sets the local file path associated with this part.

Definition at line 72 of file readonlypart.cpp.

setProgressInfoEnabled()

void ReadOnlyPart::setProgressInfoEnabled

(

bool

show

)

Call this to turn off the progress info dialog used by the internal KIO job.

Use this if you provide another way of displaying progress info (e.g. a statusbar), using the signals emitted by this class, and/or those emitted by the job given by started().

Definition at line 79 of file readonlypart.cpp.

setUrl()

void ReadOnlyPart::setUrl ( const QUrl & url )

protected

Sets the URL associated with this part.

Definition at line 53 of file readonlypart.cpp.

started

void KParts::ReadOnlyPart::started ( KIO::Job * job )

signal

The part emits this when starting to load data.

If using a KIO::Job, it provides the job so that progress information can be shown. Otherwise, job is nullptr.

url()

QUrl ReadOnlyPart::url

(

)

const

Returns the URL currently opened in (or being opened by) this part.

Note

The URL is not cleared if openUrl() fails to load the URL. Call closeUrl() if you need to explicitly reset it.

Returns

The current URL.

Definition at line 46 of file readonlypart.cpp.

urlChanged

void KParts::ReadOnlyPart::urlChanged ( const QUrl & url )

signal

Emitted by the part when url() changes.

Since

4.10

writeStream()

bool ReadOnlyPart::writeStream

(

const QByteArray &

data

)

Send some data to the part.

openStream must have been called previously, and must have returned true.

Returns

true if the data was accepted by the part. If false is returned, the application should stop sending data, and doesn't have to call closeStream.

Definition at line 313 of file readonlypart.cpp.

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

• readonlypart.h
• readonlypart.cpp