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Internal/Contributor docs for the Qt SDK. Note: These are NOT official API docs; those are found at https://doc.qt.io/
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qdesigner_internal::PreviewManager Class Reference

#include <previewmanager_p.h>

+ Inheritance diagram for qdesigner_internal::PreviewManager:
+ Collaboration diagram for qdesigner_internal::PreviewManager:

Public Types

enum  PreviewMode { ApplicationModalPreview , SingleFormNonModalPreview , MultipleFormNonModalPreview }
 

Public Slots

void closeAllPreviews ()
 
- Public Slots inherited from QObject
void deleteLater ()
 \threadsafe
 

Signals

void firstPreviewOpened ()
 
void lastPreviewClosed ()
 
- Signals inherited from QObject
void destroyed (QObject *=nullptr)
 This signal is emitted immediately before the object obj is destroyed, after any instances of QPointer have been notified, and cannot be blocked.
 
void objectNameChanged (const QString &objectName, QPrivateSignal)
 This signal is emitted after the object's name has been changed.
 

Public Member Functions

 PreviewManager (PreviewMode mode, QObject *parent)
 
 ~PreviewManager () override
 
QWidgetshowPreview (const QDesignerFormWindowInterface *, const PreviewConfiguration &pc, int deviceProfileIndex, QString *errorMessage)
 
QWidgetshowPreview (const QDesignerFormWindowInterface *, const QString &style, int deviceProfileIndex, QString *errorMessage)
 
QWidgetshowPreview (const QDesignerFormWindowInterface *, const QString &style, QString *errorMessage)
 
int previewCount () const
 
QPixmap createPreviewPixmap (const QDesignerFormWindowInterface *fw, const PreviewConfiguration &pc, int deviceProfileIndex, QString *errorMessage)
 
QPixmap createPreviewPixmap (const QDesignerFormWindowInterface *fw, const QString &style, int deviceProfileIndex, QString *errorMessage)
 
QPixmap createPreviewPixmap (const QDesignerFormWindowInterface *fw, const QString &style, QString *errorMessage)
 
bool eventFilter (QObject *watched, QEvent *event) override
 Filters events if this object has been installed as an event filter for the watched object.
 
- Public Member Functions inherited from QObject
Q_INVOKABLE QObject (QObject *parent=nullptr)
 Constructs an object with parent object parent.
 
virtual ~QObject ()
 Destroys the object, deleting all its child objects.
 
virtual bool event (QEvent *event)
 This virtual function receives events to an object and should return true if the event e was recognized and processed.
 
QString objectName () const
 
Q_WEAK_OVERLOAD void setObjectName (const QString &name)
 Sets the object's name to name.
 
void setObjectName (QAnyStringView name)
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
 
QBindable< QStringbindableObjectName ()
 
bool isWidgetType () const
 Returns true if the object is a widget; otherwise returns false.
 
bool isWindowType () const
 Returns true if the object is a window; otherwise returns false.
 
bool isQuickItemType () const
 Returns true if the object is a QQuickItem; otherwise returns false.
 
bool signalsBlocked () const noexcept
 Returns true if signals are blocked; otherwise returns false.
 
bool blockSignals (bool b) noexcept
 If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it).
 
QThreadthread () const
 Returns the thread in which the object lives.
 
bool moveToThread (QThread *thread QT6_DECL_NEW_OVERLOAD_TAIL)
 Changes the thread affinity for this object and its children and returns true on success.
 
int startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)
 This is an overloaded function that will start a timer of type timerType and a timeout of interval milliseconds.
 
int startTimer (std::chrono::nanoseconds time, Qt::TimerType timerType=Qt::CoarseTimer)
 
void killTimer (int id)
 Kills the timer with timer identifier, id.
 
void killTimer (Qt::TimerId id)
 
template<typename T >
findChild (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 Returns the child of this object that can be cast into type T and that is called name, or \nullptr if there is no such object.
 
template<typename T >
QList< T > findChildren (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) 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.
 
template<typename T >
findChild (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
 
template<typename T >
QList< T > findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
 
const QObjectListchildren () const
 Returns a list of child objects.
 
void setParent (QObject *parent)
 Makes the object a child of parent.
 
void installEventFilter (QObject *filterObj)
 Installs an event filter filterObj on this object.
 
void removeEventFilter (QObject *obj)
 Removes an event filter object obj from this object.
 
QMetaObject::Connection connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const
 
bool disconnect (const char *signal=nullptr, const QObject *receiver=nullptr, const char *member=nullptr) const
 
bool disconnect (const QObject *receiver, const char *member=nullptr) const
 
void dumpObjectTree () const
 Dumps a tree of children to the debug output.
 
void dumpObjectInfo () const
 Dumps information about signal connections, etc.
 
bool setProperty (const char *name, const QVariant &value)
 Sets the value of the object's name property to value.
 
bool setProperty (const char *name, QVariant &&value)
 
QVariant property (const char *name) const
 Returns the value of the object's name property.
 
QList< QByteArraydynamicPropertyNames () const
 
QBindingStoragebindingStorage ()
 
const QBindingStoragebindingStorage () const
 
QObjectparent () const
 Returns a pointer to the parent object.
 
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.
 

Private Member Functions

virtual Qt::WindowFlags previewWindowFlags (const QWidget *widget) const
 
virtual QWidgetcreateDeviceSkinContainer (const QDesignerFormWindowInterface *) const
 

Additional Inherited Members

- Static Public Member Functions inherited from QObject
static QMetaObject::Connection connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection)
 \threadsafe
 
static QMetaObject::Connection connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)
 
template<typename Func1 , typename Func2 >
static QMetaObject::Connection connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::ContextTypeForFunctor< Func2 >::ContextType *context, Func2 &&slot, Qt::ConnectionType type=Qt::AutoConnection)
 
template<typename Func1 , typename Func2 >
static QMetaObject::Connection connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 &&slot)
 
static bool disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member)
 \threadsafe
 
static bool disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member)
 
static bool disconnect (const QMetaObject::Connection &)
 Disconnect a connection.
 
template<typename Func1 , typename Func2 >
static bool disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object *receiver, Func2 slot)
 
template<typename Func1 >
static bool disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const QObject *receiver, void **zero)
 
- Protected Member Functions inherited from QObject
QObjectsender () const
 Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns \nullptr.
 
int senderSignalIndex () const
 
int receivers (const char *signal) const
 Returns the number of receivers connected to the signal.
 
bool isSignalConnected (const QMetaMethod &signal) const
 
virtual void timerEvent (QTimerEvent *event)
 This event handler can be reimplemented in a subclass to receive timer events for the object.
 
virtual void childEvent (QChildEvent *event)
 This event handler can be reimplemented in a subclass to receive child events.
 
virtual void customEvent (QEvent *event)
 This event handler can be reimplemented in a subclass to receive custom events.
 
virtual void connectNotify (const QMetaMethod &signal)
 
virtual void disconnectNotify (const QMetaMethod &signal)
 
 QObject (QObjectPrivate &dd, QObject *parent=nullptr)
 
- Protected Attributes inherited from QObject
QScopedPointer< QObjectDatad_ptr
 
- Properties inherited from QObject
QString objectName
 the name of this object
 

Detailed Description

Definition at line 79 of file previewmanager_p.h.

Member Enumeration Documentation

◆ PreviewMode

Enumerator
ApplicationModalPreview 
SingleFormNonModalPreview 
MultipleFormNonModalPreview 

Definition at line 84 of file previewmanager_p.h.

Constructor & Destructor Documentation

◆ PreviewManager()

qdesigner_internal::PreviewManager::PreviewManager ( PreviewMode mode,
QObject * parent )
explicit

Definition at line 551 of file previewmanager.cpp.

◆ ~PreviewManager()

qdesigner_internal::PreviewManager::~PreviewManager ( )
override

Definition at line 557 of file previewmanager.cpp.

Member Function Documentation

◆ closeAllPreviews

void qdesigner_internal::PreviewManager::closeAllPreviews ( )
slot

Definition at line 787 of file previewmanager.cpp.

◆ createDeviceSkinContainer()

QWidget * qdesigner_internal::PreviewManager::createDeviceSkinContainer ( const QDesignerFormWindowInterface * fw) const
privatevirtual

Definition at line 579 of file previewmanager.cpp.

◆ createPreviewPixmap() [1/3]

QPixmap qdesigner_internal::PreviewManager::createPreviewPixmap ( const QDesignerFormWindowInterface * fw,
const PreviewConfiguration & pc,
int deviceProfileIndex,
QString * errorMessage )

Definition at line 876 of file previewmanager.cpp.

◆ createPreviewPixmap() [2/3]

QPixmap qdesigner_internal::PreviewManager::createPreviewPixmap ( const QDesignerFormWindowInterface * fw,
const QString & style,
int deviceProfileIndex,
QString * errorMessage )

Definition at line 866 of file previewmanager.cpp.

◆ createPreviewPixmap() [3/3]

QPixmap qdesigner_internal::PreviewManager::createPreviewPixmap ( const QDesignerFormWindowInterface * fw,
const QString & style,
QString * errorMessage )

Definition at line 871 of file previewmanager.cpp.

◆ eventFilter()

bool qdesigner_internal::PreviewManager::eventFilter ( QObject * watched,
QEvent * event )
overridevirtual

Filters events if this object has been installed as an event filter for the watched object.

In your reimplementation of this function, if you want to filter the event out, i.e. stop it being handled further, return true; otherwise return false.

Example:

class MainWindow : public QMainWindow
{
public:
protected:
bool eventFilter(QObject *obj, QEvent *ev) override;
private:
QTextEdit *textEdit;
};
{
textEdit = new QTextEdit;
setCentralWidget(textEdit);
textEdit->installEventFilter(this);
}
{
if (obj == textEdit) {
if (event->type() == QEvent::KeyPress) {
QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
qDebug() << "Ate key press" << keyEvent->key();
return true;
} else {
return false;
}
} else {
// pass the event on to the parent class
}
}

Notice in the example above that unhandled events are passed to the base class's eventFilter() function, since the base class might have reimplemented eventFilter() for its own internal purposes.

Some events, such as \l QEvent::ShortcutOverride must be explicitly accepted (by calling \l {QEvent::}{accept()} on them) in order to prevent propagation.

Warning
If you delete the receiver object in this function, be sure to return true. Otherwise, Qt will forward the event to the deleted object and the program might crash.
See also
installEventFilter()

Reimplemented from QObject.

Definition at line 819 of file previewmanager.cpp.

◆ firstPreviewOpened

void qdesigner_internal::PreviewManager::firstPreviewOpened ( )
signal

◆ lastPreviewClosed

void qdesigner_internal::PreviewManager::lastPreviewClosed ( )
signal

◆ previewCount()

int qdesigner_internal::PreviewManager::previewCount ( ) const

Definition at line 861 of file previewmanager.cpp.

◆ previewWindowFlags()

Qt::WindowFlags qdesigner_internal::PreviewManager::previewWindowFlags ( const QWidget * widget) const
privatevirtual

Definition at line 563 of file previewmanager.cpp.

◆ showPreview() [1/3]

QWidget * qdesigner_internal::PreviewManager::showPreview ( const QDesignerFormWindowInterface * fw,
const PreviewConfiguration & pc,
int deviceProfileIndex,
QString * errorMessage )

Definition at line 709 of file previewmanager.cpp.

◆ showPreview() [2/3]

QWidget * qdesigner_internal::PreviewManager::showPreview ( const QDesignerFormWindowInterface * fw,
const QString & style,
int deviceProfileIndex,
QString * errorMessage )

Definition at line 617 of file previewmanager.cpp.

◆ showPreview() [3/3]

QWidget * qdesigner_internal::PreviewManager::showPreview ( const QDesignerFormWindowInterface * fw,
const QString & style,
QString * errorMessage )

Definition at line 622 of file previewmanager.cpp.


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