Qt 4.8
Signals | Public Functions | Properties | List of all members
QDeclarativeParticleMotionGravity Class Reference

#include <qdeclarativeparticles_p.h>

Inheritance diagram for QDeclarativeParticleMotionGravity:
QDeclarativeParticleMotion QObject

Signals

void accelerationChanged ()
 
void xattractorChanged ()
 
void yattractorChanged ()
 
- 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...
 

Public Functions

qreal acceleration () const
 
virtual void advance (QDeclarativeParticle &, int interval)
 Move the particle to its new position. More...
 
 QDeclarativeParticleMotionGravity (QObject *parent=0)
 
void setAcceleration (qreal accel)
 
void setXAttractor (qreal x)
 
void setYAttractor (qreal y)
 
qreal xAttractor () const
 
qreal yAttractor () const
 
- Public Functions inherited from QDeclarativeParticleMotion
virtual void created (QDeclarativeParticle &)
 The particle has just been created. More...
 
virtual void destroy (QDeclarativeParticle &)
 The particle is about to be destroyed. More...
 
 QDeclarativeParticleMotion (QObject *parent=0)
 Constructs a QDeclarativeParticleMotion with parent object parent. More...
 
- 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...
 

Properties

qreal _accel
 
qreal _xAttr
 
qreal _yAttr
 
qreal acceleration
 the acceleration to apply to the particles. More...
 
qreal xattractor
 the x coordinate of the point attracting the particles. More...
 
qreal yattractor
 the y coordinate of the point attracting the particles. More...
 

Additional Inherited Members

- Public Slots inherited from QObject
void deleteLater ()
 Schedules this object for deletion. 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)
 
- Static Public Variables inherited from QObject
static const QMetaObject staticMetaObject
 This variable stores the meta-object for the class. More...
 
- 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 76 of file qdeclarativeparticles_p.h.

Constructors and Destructors

◆ QDeclarativeParticleMotionGravity()

QDeclarativeParticleMotionGravity::QDeclarativeParticleMotionGravity ( QObject parent = 0)
inline

Definition at line 84 of file qdeclarativeparticles_p.h.

85  : QDeclarativeParticleMotion(parent), _xAttr(0.0), _yAttr(0.0), _accel(0.00005) {}
QDeclarativeParticleMotion(QObject *parent=0)
Constructs a QDeclarativeParticleMotion with parent object parent.

Functions

◆ acceleration()

qreal QDeclarativeParticleMotionGravity::acceleration ( ) const
inline

Definition at line 93 of file qdeclarativeparticles_p.h.

93 { return _accel * 1000000; }

◆ accelerationChanged

void QDeclarativeParticleMotionGravity::accelerationChanged ( )
signal

◆ advance()

void QDeclarativeParticleMotionGravity::advance ( QDeclarativeParticle particle,
int  interval 
)
virtual

Move the particle to its new position.

interval is the number of milliseconds elapsed since it was last moved.

Reimplemented from QDeclarativeParticleMotion.

Definition at line 265 of file qdeclarativeparticles.cpp.

266 {
267  qreal xdiff = _xAttr - p.x;
268  qreal ydiff = _yAttr - p.y;
269  qreal absXdiff = qAbs(xdiff);
270  qreal absYdiff = qAbs(ydiff);
271 
272  qreal xcomp = xdiff / (absXdiff + absYdiff);
273  qreal ycomp = ydiff / (absXdiff + absYdiff);
274 
275  p.x_velocity += xcomp * _accel * interval;
276  p.y_velocity += ycomp * _accel * interval;
277 
278  p.x += interval * p.x_velocity;
279  p.y += interval * p.y_velocity;
280 }
double qreal
Definition: qglobal.h:1193
Q_DECL_CONSTEXPR T qAbs(const T &t)
Definition: qglobal.h:1201

◆ setAcceleration()

void QDeclarativeParticleMotionGravity::setAcceleration ( qreal  accel)

Definition at line 256 of file qdeclarativeparticles.cpp.

257 {
258  qreal scaledAccel = accel/1000000.0;
259  if (qFuzzyCompare(scaledAccel, _accel))
260  return;
261  _accel = scaledAccel;
263 }
double qreal
Definition: qglobal.h:1193
static Q_DECL_CONSTEXPR bool qFuzzyCompare(double p1, double p2)
Definition: qglobal.h:2030
#define emit
Definition: qobjectdefs.h:76

◆ setXAttractor()

void QDeclarativeParticleMotionGravity::setXAttractor ( qreal  x)

Definition at line 240 of file qdeclarativeparticles.cpp.

241 {
242  if (qFuzzyCompare(x, _xAttr))
243  return;
244  _xAttr = x;
246 }
static Q_DECL_CONSTEXPR bool qFuzzyCompare(double p1, double p2)
Definition: qglobal.h:2030
#define emit
Definition: qobjectdefs.h:76

◆ setYAttractor()

void QDeclarativeParticleMotionGravity::setYAttractor ( qreal  y)

Definition at line 248 of file qdeclarativeparticles.cpp.

249 {
250  if (qFuzzyCompare(y, _yAttr))
251  return;
252  _yAttr = y;
254 }
static Q_DECL_CONSTEXPR bool qFuzzyCompare(double p1, double p2)
Definition: qglobal.h:2030
#define emit
Definition: qobjectdefs.h:76

◆ xAttractor()

qreal QDeclarativeParticleMotionGravity::xAttractor ( ) const
inline

Definition at line 87 of file qdeclarativeparticles_p.h.

◆ xattractorChanged

void QDeclarativeParticleMotionGravity::xattractorChanged ( )
signal

◆ yAttractor()

qreal QDeclarativeParticleMotionGravity::yAttractor ( ) const
inline

Definition at line 90 of file qdeclarativeparticles_p.h.

◆ yattractorChanged

void QDeclarativeParticleMotionGravity::yattractorChanged ( )
signal

Properties

◆ _accel

qreal QDeclarativeParticleMotionGravity::_accel
private

Definition at line 106 of file qdeclarativeparticles_p.h.

◆ _xAttr

qreal QDeclarativeParticleMotionGravity::_xAttr
private

Definition at line 104 of file qdeclarativeparticles_p.h.

◆ _yAttr

qreal QDeclarativeParticleMotionGravity::_yAttr
private

Definition at line 105 of file qdeclarativeparticles_p.h.

◆ acceleration

QDeclarativeParticleMotionGravity::acceleration
private

the acceleration to apply to the particles.

Definition at line 82 of file qdeclarativeparticles_p.h.

◆ xattractor

QDeclarativeParticleMotionGravity::xattractor
private

the x coordinate of the point attracting the particles.

Definition at line 80 of file qdeclarativeparticles_p.h.

◆ yattractor

QDeclarativeParticleMotionGravity::yattractor
private

the y coordinate of the point attracting the particles.

Definition at line 81 of file qdeclarativeparticles_p.h.


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