Qt 4.8
Public Types | Public Functions | Static Public Variables | List of all members
QTextImageHandler Class Reference

#include <qtextimagehandler_p.h>

Inheritance diagram for QTextImageHandler:
QObject QTextObjectInterface

Public Types

typedef QImage(* ExternalImageLoaderFunction) (const QString &name, const QString &context)
 

Public Functions

virtual void drawObject (QPainter *p, const QRectF &rect, QTextDocument *doc, int posInDocument, const QTextFormat &format)
 Draws this text object using the specified painter. More...
 
virtual QSizeF intrinsicSize (QTextDocument *doc, int posInDocument, const QTextFormat &format)
 The intrinsicSize() function returns the size of the text object represented by format in the given document (doc) at the given position (posInDocument). More...
 
 QTextImageHandler (QObject *parent=0)
 
- Public Functions inherited from QObject
bool blockSignals (bool b)
 If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). More...
 
const QObjectListchildren () const
 Returns a list of child objects. More...
 
bool connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const
 
bool disconnect (const char *signal=0, const QObject *receiver=0, const char *member=0)
 
bool disconnect (const QObject *receiver, const char *member=0)
 
void dumpObjectInfo ()
 Dumps information about signal connections, etc. More...
 
void dumpObjectTree ()
 Dumps a tree of children to the debug output. More...
 
QList< QByteArraydynamicPropertyNames () const
 Returns the names of all properties that were dynamically added to the object using setProperty(). More...
 
virtual bool event (QEvent *)
 This virtual function receives events to an object and should return true if the event e was recognized and processed. More...
 
virtual bool eventFilter (QObject *, QEvent *)
 Filters events if this object has been installed as an event filter for the watched object. More...
 
template<typename T >
findChild (const QString &aName=QString()) const
 Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More...
 
template<typename T >
QList< T > findChildren (const QString &aName=QString()) const
 Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. More...
 
template<typename T >
QList< T > findChildren (const QRegExp &re) const
 
bool inherits (const char *classname) const
 Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. More...
 
void installEventFilter (QObject *)
 Installs an event filter filterObj on this object. More...
 
bool isWidgetType () const
 Returns true if the object is a widget; otherwise returns false. More...
 
void killTimer (int id)
 Kills the timer with timer identifier, id. More...
 
virtual const QMetaObjectmetaObject () const
 Returns a pointer to the meta-object of this object. More...
 
void moveToThread (QThread *thread)
 Changes the thread affinity for this object and its children. More...
 
QString objectName () const
 
QObjectparent () const
 Returns a pointer to the parent object. More...
 
QVariant property (const char *name) const
 Returns the value of the object's name property. More...
 
Q_INVOKABLE QObject (QObject *parent=0)
 Constructs an object with parent object parent. More...
 
void removeEventFilter (QObject *)
 Removes an event filter object obj from this object. More...
 
void setObjectName (const QString &name)
 
void setParent (QObject *)
 Makes the object a child of parent. More...
 
bool setProperty (const char *name, const QVariant &value)
 Sets the value of the object's name property to value. More...
 
void setUserData (uint id, QObjectUserData *data)
 
bool signalsBlocked () const
 Returns true if signals are blocked; otherwise returns false. More...
 
int startTimer (int interval)
 Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More...
 
QThreadthread () const
 Returns the thread in which the object lives. More...
 
QObjectUserDatauserData (uint id) const
 
virtual ~QObject ()
 Destroys the object, deleting all its child objects. More...
 
- Public Functions inherited from QTextObjectInterface
virtual ~QTextObjectInterface ()
 Destroys this QTextObjectInterface. More...
 

Static Public Variables

static Q_GUI_EXPORT ExternalImageLoaderFunction externalLoader = 0
 
- Static Public Variables inherited from QObject
static const QMetaObject staticMetaObject
 This variable stores the meta-object for the class. More...
 

Additional Inherited Members

- Public Slots inherited from QObject
void deleteLater ()
 Schedules this object for deletion. More...
 
- Signals inherited from QObject
void destroyed (QObject *=0)
 This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More...
 
- Static Public Functions inherited from QObject
static bool connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection)
 Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More...
 
static bool connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)
 
static bool disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member)
 Disconnects signal in object sender from method in object receiver. More...
 
static bool disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member)
 
static uint registerUserData ()
 
static QString tr (const char *sourceText, const char *comment=0, int n=-1)
 
static QString trUtf8 (const char *sourceText, const char *comment=0, int n=-1)
 
- Protected Functions inherited from QObject
virtual void childEvent (QChildEvent *)
 This event handler can be reimplemented in a subclass to receive child events. More...
 
virtual void connectNotify (const char *signal)
 This virtual function is called when something has been connected to signal in this object. More...
 
virtual void customEvent (QEvent *)
 This event handler can be reimplemented in a subclass to receive custom events. More...
 
virtual void disconnectNotify (const char *signal)
 This virtual function is called when something has been disconnected from signal in this object. More...
 
 QObject (QObjectPrivate &dd, QObject *parent=0)
 
int receivers (const char *signal) const
 Returns the number of receivers connected to the signal. More...
 
QObjectsender () const
 Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns 0. More...
 
int senderSignalIndex () const
 
virtual void timerEvent (QTimerEvent *)
 This event handler can be reimplemented in a subclass to receive timer events for the object. More...
 
- Protected Variables inherited from QObject
QScopedPointer< QObjectDatad_ptr
 
- Static Protected Variables inherited from QObject
static const QMetaObject staticQtMetaObject
 

Detailed Description

Definition at line 63 of file qtextimagehandler_p.h.

Typedefs

◆ ExternalImageLoaderFunction

typedef QImage(* QTextImageHandler::ExternalImageLoaderFunction) (const QString &name, const QString &context)

Definition at line 74 of file qtextimagehandler_p.h.

Constructors and Destructors

◆ QTextImageHandler()

QTextImageHandler::QTextImageHandler ( QObject parent = 0)
explicit

Definition at line 203 of file qtextimagehandler.cpp.

204  : QObject(parent)
205 {
206 }
Q_INVOKABLE QObject(QObject *parent=0)
Constructs an object with parent object parent.
Definition: qobject.cpp:753

Functions

◆ drawObject()

void QTextImageHandler::drawObject ( QPainter painter,
const QRectF rect,
QTextDocument doc,
int  posInDocument,
const QTextFormat format 
)
virtual

Draws this text object using the specified painter.

The size of the rectangle, rect, to draw in is the size previously calculated by intrinsicSize(). The rectangles position is relative to the painter.

You also get the document (doc) and the position (posInDocument) of the format in that document.

See also
intrinsicSize()

Implements QTextObjectInterface.

Definition at line 218 of file qtextimagehandler.cpp.

219 {
220  Q_UNUSED(posInDocument)
221  const QTextImageFormat imageFormat = format.toImageFormat();
222 
223  if (qApp->thread() != QThread::currentThread()) {
224  const QImage image = getImage(doc, imageFormat);
225  p->drawImage(rect, image, image.rect());
226  } else {
227  const QPixmap pixmap = getPixmap(doc, imageFormat);
228  p->drawPixmap(rect, pixmap, pixmap.rect());
229  }
230 }
static QPixmap getPixmap(QTextDocument *doc, const QTextImageFormat &format)
QRect rect() const
Returns the enclosing rectangle (0, 0, width(), height()) of the image.
Definition: qimage.cpp:1603
static QThread * currentThread()
Returns a pointer to a QThread which manages the currently executing thread.
Definition: qthread.cpp:419
The QTextImageFormat class provides formatting information for images in a QTextDocument.
Definition: qtextformat.h:694
static QImage getImage(QTextDocument *doc, const QTextImageFormat &format)
#define qApp
The QImage class provides a hardware-independent image representation that allows direct access to th...
Definition: qimage.h:87
QTextImageFormat toImageFormat() const
Returns this format as an image format.
QRect rect() const
Returns the pixmap&#39;s enclosing rectangle.
Definition: qpixmap.cpp:676
The QPixmap class is an off-screen image representation that can be used as a paint device...
Definition: qpixmap.h:71
#define Q_UNUSED(x)
Indicates to the compiler that the parameter with the specified name is not used in the body of a fun...
Definition: qglobal.h:1729

◆ intrinsicSize()

QSizeF QTextImageHandler::intrinsicSize ( QTextDocument doc,
int  posInDocument,
const QTextFormat format 
)
virtual

The intrinsicSize() function returns the size of the text object represented by format in the given document (doc) at the given position (posInDocument).

The size calculated will be used for subsequent calls to drawObject() for this format.

See also
drawObject()

Implements QTextObjectInterface.

Definition at line 208 of file qtextimagehandler.cpp.

209 {
210  Q_UNUSED(posInDocument)
211  const QTextImageFormat imageFormat = format.toImageFormat();
212 
213  if (qApp->thread() != QThread::currentThread())
214  return getImageSize(doc, imageFormat);
215  return getPixmapSize(doc, imageFormat);
216 }
static QSize getPixmapSize(QTextDocument *doc, const QTextImageFormat &format)
static QSize getImageSize(QTextDocument *doc, const QTextImageFormat &format)
static QThread * currentThread()
Returns a pointer to a QThread which manages the currently executing thread.
Definition: qthread.cpp:419
The QTextImageFormat class provides formatting information for images in a QTextDocument.
Definition: qtextformat.h:694
#define qApp
QTextImageFormat toImageFormat() const
Returns this format as an image format.
#define Q_UNUSED(x)
Indicates to the compiler that the parameter with the specified name is not used in the body of a fun...
Definition: qglobal.h:1729

Properties

◆ externalLoader

QTextImageHandler::ExternalImageLoaderFunction QTextImageHandler::externalLoader = 0
static

Definition at line 75 of file qtextimagehandler_p.h.

Referenced by getImage(), getPixmap(), and QTextOdfWriter::writeInlineCharacter().


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