--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/corelib/statemachine/qstatemachine.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,2300 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qstatemachine.h"
+
+#ifndef QT_NO_STATEMACHINE
+
+#include "qstate.h"
+#include "qstate_p.h"
+#include "qstatemachine_p.h"
+#include "qabstracttransition.h"
+#include "qabstracttransition_p.h"
+#include "qsignaltransition.h"
+#include "qsignaltransition_p.h"
+#include "qsignaleventgenerator_p.h"
+#include "qabstractstate.h"
+#include "qabstractstate_p.h"
+#include "qfinalstate.h"
+#include "qhistorystate.h"
+#include "qhistorystate_p.h"
+#include "private/qobject_p.h"
+#include "private/qthread_p.h"
+
+#ifndef QT_NO_STATEMACHINE_EVENTFILTER
+#include "qeventtransition.h"
+#include "qeventtransition_p.h"
+#endif
+
+#ifndef QT_NO_ANIMATION
+#include "qpropertyanimation.h"
+#include "qanimationgroup.h"
+#include <private/qvariantanimation_p.h>
+#endif
+
+#include <QtCore/qmetaobject.h>
+#include <qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+ \class QStateMachine
+ \reentrant
+
+ \brief The QStateMachine class provides a hierarchical finite state machine.
+
+ \since 4.6
+ \ingroup statemachine
+
+ QStateMachine is based on the concepts and notation of
+ \l{Statecharts: A visual formalism for complex
+ systems}{Statecharts}. QStateMachine is part of \l{The State
+ Machine Framework}.
+
+ A state machine manages a set of states (classes that inherit from
+ QAbstractState) and transitions (descendants of
+ QAbstractTransition) between those states; these states and
+ transitions define a state graph. Once a state graph has been
+ built, the state machine can execute it. QStateMachine's
+ execution algorithm is based on the \l{State Chart XML: State
+ Machine Notation for Control Abstraction}{State Chart XML (SCXML)}
+ algorithm. The framework's \l{The State Machine
+ Framework}{overview} gives several state graphs and the code to
+ build them.
+
+ Use the addState() function to add a top-level state to the state machine.
+ States are removed with the removeState() function. Removing states while
+ the machine is running is discouraged.
+
+ Before the machine can be started, the \l{initialState}{initial
+ state} must be set. The initial state is the state that the
+ machine enters when started. You can then start() the state
+ machine. The started() signal is emitted when the initial state is
+ entered.
+
+ The machine is event driven and keeps its own event loop. Events
+ are posted to the machine through postEvent(). Note that this
+ means that it executes asynchronously, and that it will not
+ progress without a running event loop. You will normally not have
+ to post events to the machine directly as Qt's transitions, e.g.,
+ QEventTransition and its subclasses, handle this. But for custom
+ transitions triggered by events, postEvent() is useful.
+
+ The state machine processes events and takes transitions until a
+ top-level final state is entered; the state machine then emits the
+ finished() signal. You can also stop() the state machine
+ explicitly. The stopped() signal is emitted in this case.
+
+ The following snippet shows a state machine that will finish when a button
+ is clicked:
+
+ \snippet doc/src/snippets/code/src_corelib_statemachine_qstatemachine.cpp simple state machine
+
+ This code example uses QState, which inherits QAbstractState. The
+ QState class provides a state that you can use to set properties
+ and invoke methods on \l{QObject}s when the state is entered or
+ exited. It also contains convenience functions for adding
+ transitions, e.g., \l{QSignalTransition}s as in this example. See
+ the QState class description for further details.
+
+ If an error is encountered, the machine will look for an
+ \l{errorState}{error state}, and if one is available, it will
+ enter this state. The types of errors possible are described by the
+ \l{QStateMachine::}{Error} enum. After the error state is entered,
+ the type of the error can be retrieved with error(). The execution
+ of the state graph will not stop when the error state is entered. If
+ no error state applies to the erroneous state, the machine will stop
+ executing and an error message will be printed to the console.
+
+ \sa QAbstractState, QAbstractTransition, QState, {The State Machine Framework}
+*/
+
+/*!
+ \property QStateMachine::errorString
+
+ \brief the error string of this state machine
+*/
+
+/*!
+ \property QStateMachine::globalRestorePolicy
+
+ \brief the restore policy for states of this state machine.
+
+ The default value of this property is
+ QStateMachine::DoNotRestoreProperties.
+*/
+
+#ifndef QT_NO_ANIMATION
+/*!
+ \property QStateMachine::animationsEnabled
+
+ \brief whether animations are enabled
+
+ The default value of this property is true.
+
+ \sa QAbstractTransition::addAnimation()
+*/
+#endif
+
+// #define QSTATEMACHINE_DEBUG
+
+QStateMachinePrivate::QStateMachinePrivate()
+{
+ state = NotRunning;
+ _startState = 0;
+ processing = false;
+ processingScheduled = false;
+ stop = false;
+ stopProcessingReason = EventQueueEmpty;
+ error = QStateMachine::NoError;
+ globalRestorePolicy = QStateMachine::DoNotRestoreProperties;
+ signalEventGenerator = 0;
+#ifndef QT_NO_ANIMATION
+ animationsEnabled = true;
+#endif
+}
+
+QStateMachinePrivate::~QStateMachinePrivate()
+{
+ qDeleteAll(internalEventQueue);
+ qDeleteAll(externalEventQueue);
+}
+
+QStateMachinePrivate *QStateMachinePrivate::get(QStateMachine *q)
+{
+ if (q)
+ return q->d_func();
+ return 0;
+}
+
+QState *QStateMachinePrivate::rootState() const
+{
+ return const_cast<QStateMachine*>(q_func());
+}
+
+static QEvent *cloneEvent(QEvent *e)
+{
+ switch (e->type()) {
+ case QEvent::None:
+ return new QEvent(*e);
+ case QEvent::Timer:
+ return new QTimerEvent(*static_cast<QTimerEvent*>(e));
+ default:
+ Q_ASSERT_X(false, "cloneEvent()", "not implemented");
+ break;
+ }
+ return 0;
+}
+
+const QStateMachinePrivate::Handler qt_kernel_statemachine_handler = {
+ cloneEvent
+};
+
+const QStateMachinePrivate::Handler *QStateMachinePrivate::handler = &qt_kernel_statemachine_handler;
+
+Q_CORE_EXPORT const QStateMachinePrivate::Handler *qcoreStateMachineHandler()
+{
+ return &qt_kernel_statemachine_handler;
+}
+
+static int indexOfDescendant(QState *s, QAbstractState *desc)
+{
+ QList<QAbstractState*> childStates = QStatePrivate::get(s)->childStates();
+ for (int i = 0; i < childStates.size(); ++i) {
+ QAbstractState *c = childStates.at(i);
+ if ((c == desc) || QStateMachinePrivate::isDescendantOf(desc, c)) {
+ return i;
+ }
+ }
+ return -1;
+}
+
+bool QStateMachinePrivate::stateEntryLessThan(QAbstractState *s1, QAbstractState *s2)
+{
+ if (s1->parent() == s2->parent()) {
+ return s1->children().indexOf(s1)
+ < s2->children().indexOf(s2);
+ } else if (isDescendantOf(s1, s2)) {
+ return false;
+ } else if (isDescendantOf(s2, s1)) {
+ return true;
+ } else {
+ Q_ASSERT(s1->machine() != 0);
+ QStateMachinePrivate *mach = QStateMachinePrivate::get(s1->machine());
+ QState *lca = mach->findLCA(QList<QAbstractState*>() << s1 << s2);
+ Q_ASSERT(lca != 0);
+ return (indexOfDescendant(lca, s1) < indexOfDescendant(lca, s2));
+ }
+}
+
+bool QStateMachinePrivate::stateExitLessThan(QAbstractState *s1, QAbstractState *s2)
+{
+ if (s1->parent() == s2->parent()) {
+ return s1->children().indexOf(s1)
+ < s2->children().indexOf(s2);
+ } else if (isDescendantOf(s1, s2)) {
+ return true;
+ } else if (isDescendantOf(s2, s1)) {
+ return false;
+ } else {
+ Q_ASSERT(s1->machine() != 0);
+ QStateMachinePrivate *mach = QStateMachinePrivate::get(s1->machine());
+ QState *lca = mach->findLCA(QList<QAbstractState*>() << s1 << s2);
+ Q_ASSERT(lca != 0);
+ return (indexOfDescendant(lca, s1) < indexOfDescendant(lca, s2));
+ }
+}
+
+QState *QStateMachinePrivate::findLCA(const QList<QAbstractState*> &states) const
+{
+ if (states.isEmpty())
+ return 0;
+ QList<QState*> ancestors = properAncestors(states.at(0), rootState()->parentState());
+ for (int i = 0; i < ancestors.size(); ++i) {
+ QState *anc = ancestors.at(i);
+ bool ok = true;
+ for (int j = states.size() - 1; (j > 0) && ok; --j) {
+ const QAbstractState *s = states.at(j);
+ if (!isDescendantOf(s, anc))
+ ok = false;
+ }
+ if (ok)
+ return anc;
+ }
+ return 0;
+}
+
+bool QStateMachinePrivate::isPreempted(const QAbstractState *s, const QSet<QAbstractTransition*> &transitions) const
+{
+ QSet<QAbstractTransition*>::const_iterator it;
+ for (it = transitions.constBegin(); it != transitions.constEnd(); ++it) {
+ QAbstractTransition *t = *it;
+ QList<QAbstractState*> lst = t->targetStates();
+ if (!lst.isEmpty()) {
+ lst.prepend(t->sourceState());
+ QAbstractState *lca = findLCA(lst);
+ if (isDescendantOf(s, lca)) {
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q_func() << ':' << transitions << "preempts selection of a transition from"
+ << s << "because" << s << "is a descendant of" << lca;
+#endif
+ return true;
+ }
+ }
+ }
+ return false;
+}
+
+QSet<QAbstractTransition*> QStateMachinePrivate::selectTransitions(QEvent *event) const
+{
+ Q_Q(const QStateMachine);
+ QSet<QAbstractTransition*> enabledTransitions;
+ QSet<QAbstractState*>::const_iterator it;
+ const_cast<QStateMachine*>(q)->beginSelectTransitions(event);
+ for (it = configuration.constBegin(); it != configuration.constEnd(); ++it) {
+ QAbstractState *state = *it;
+ if (!isAtomic(state))
+ continue;
+ if (isPreempted(state, enabledTransitions))
+ continue;
+ QList<QState*> lst = properAncestors(state, rootState()->parentState());
+ if (QState *grp = qobject_cast<QState*>(state))
+ lst.prepend(grp);
+ bool found = false;
+ for (int j = 0; (j < lst.size()) && !found; ++j) {
+ QState *s = lst.at(j);
+ QList<QAbstractTransition*> transitions = QStatePrivate::get(s)->transitions();
+ for (int k = 0; k < transitions.size(); ++k) {
+ QAbstractTransition *t = transitions.at(k);
+ if (QAbstractTransitionPrivate::get(t)->callEventTest(event)) {
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q << ": selecting transition" << t;
+#endif
+ enabledTransitions.insert(t);
+ found = true;
+ break;
+ }
+ }
+ }
+ }
+ const_cast<QStateMachine*>(q)->endSelectTransitions(event);
+ return enabledTransitions;
+}
+
+void QStateMachinePrivate::microstep(QEvent *event, const QList<QAbstractTransition*> &enabledTransitions)
+{
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q_func() << ": begin microstep( enabledTransitions:" << enabledTransitions << ')';
+ qDebug() << q_func() << ": configuration before exiting states:" << configuration;
+#endif
+ QList<QAbstractState*> exitedStates = exitStates(event, enabledTransitions);
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q_func() << ": configuration after exiting states:" << configuration;
+#endif
+ executeTransitionContent(event, enabledTransitions);
+ QList<QAbstractState*> enteredStates = enterStates(event, enabledTransitions);
+#ifndef QT_NO_PROPERTIES
+ applyProperties(enabledTransitions, exitedStates, enteredStates);
+#endif
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q_func() << ": configuration after entering states:" << configuration;
+ qDebug() << q_func() << ": end microstep";
+#endif
+}
+
+QList<QAbstractState*> QStateMachinePrivate::exitStates(QEvent *event, const QList<QAbstractTransition*> &enabledTransitions)
+{
+// qDebug() << "exitStates(" << enabledTransitions << ')';
+ QSet<QAbstractState*> statesToExit;
+// QSet<QAbstractState*> statesToSnapshot;
+ for (int i = 0; i < enabledTransitions.size(); ++i) {
+ QAbstractTransition *t = enabledTransitions.at(i);
+ QList<QAbstractState*> lst = t->targetStates();
+ if (lst.isEmpty())
+ continue;
+ lst.prepend(t->sourceState());
+ QAbstractState *lca = findLCA(lst);
+ if (lca == 0) {
+ setError(QStateMachine::NoCommonAncestorForTransitionError, t->sourceState());
+ lst = pendingErrorStates.toList();
+ lst.prepend(t->sourceState());
+
+ lca = findLCA(lst);
+ Q_ASSERT(lca != 0);
+ }
+
+ {
+ QSet<QAbstractState*>::const_iterator it;
+ for (it = configuration.constBegin(); it != configuration.constEnd(); ++it) {
+ QAbstractState *s = *it;
+ if (isDescendantOf(s, lca))
+ statesToExit.insert(s);
+ }
+ }
+ }
+ QList<QAbstractState*> statesToExit_sorted = statesToExit.toList();
+ qSort(statesToExit_sorted.begin(), statesToExit_sorted.end(), stateExitLessThan);
+ for (int i = 0; i < statesToExit_sorted.size(); ++i) {
+ QAbstractState *s = statesToExit_sorted.at(i);
+ if (QState *grp = qobject_cast<QState*>(s)) {
+ QList<QHistoryState*> hlst = QStatePrivate::get(grp)->historyStates();
+ for (int j = 0; j < hlst.size(); ++j) {
+ QHistoryState *h = hlst.at(j);
+ QHistoryStatePrivate::get(h)->configuration.clear();
+ QSet<QAbstractState*>::const_iterator it;
+ for (it = configuration.constBegin(); it != configuration.constEnd(); ++it) {
+ QAbstractState *s0 = *it;
+ if (QHistoryStatePrivate::get(h)->historyType == QHistoryState::DeepHistory) {
+ if (isAtomic(s0) && isDescendantOf(s0, s))
+ QHistoryStatePrivate::get(h)->configuration.append(s0);
+ } else if (s0->parentState() == s) {
+ QHistoryStatePrivate::get(h)->configuration.append(s0);
+ }
+ }
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q_func() << ": recorded" << ((QHistoryStatePrivate::get(h)->historyType == QHistoryState::DeepHistory) ? "deep" : "shallow")
+ << "history for" << s << "in" << h << ':' << QHistoryStatePrivate::get(h)->configuration;
+#endif
+ }
+ }
+ }
+ for (int i = 0; i < statesToExit_sorted.size(); ++i) {
+ QAbstractState *s = statesToExit_sorted.at(i);
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q_func() << ": exiting" << s;
+#endif
+ QAbstractStatePrivate::get(s)->callOnExit(event);
+ configuration.remove(s);
+ QAbstractStatePrivate::get(s)->emitExited();
+ }
+ return statesToExit_sorted;
+}
+
+void QStateMachinePrivate::executeTransitionContent(QEvent *event, const QList<QAbstractTransition*> &enabledTransitions)
+{
+ for (int i = 0; i < enabledTransitions.size(); ++i) {
+ QAbstractTransition *t = enabledTransitions.at(i);
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q_func() << ": triggering" << t;
+#endif
+ QAbstractTransitionPrivate::get(t)->callOnTransition(event);
+ QAbstractTransitionPrivate::get(t)->emitTriggered();
+ }
+}
+
+QList<QAbstractState*> QStateMachinePrivate::enterStates(QEvent *event, const QList<QAbstractTransition*> &enabledTransitions)
+{
+#ifdef QSTATEMACHINE_DEBUG
+ Q_Q(QStateMachine);
+#endif
+// qDebug() << "enterStates(" << enabledTransitions << ')';
+ QSet<QAbstractState*> statesToEnter;
+ QSet<QAbstractState*> statesForDefaultEntry;
+
+ if (pendingErrorStates.isEmpty()) {
+ for (int i = 0; i < enabledTransitions.size(); ++i) {
+ QAbstractTransition *t = enabledTransitions.at(i);
+ QList<QAbstractState*> lst = t->targetStates();
+ if (lst.isEmpty())
+ continue;
+ lst.prepend(t->sourceState());
+ QState *lca = findLCA(lst);
+ for (int j = 1; j < lst.size(); ++j) {
+ QAbstractState *s = lst.at(j);
+ addStatesToEnter(s, lca, statesToEnter, statesForDefaultEntry);
+ if (isParallel(lca)) {
+ QList<QAbstractState*> lcac = QStatePrivate::get(lca)->childStates();
+ foreach (QAbstractState* child,lcac) {
+ if (!statesToEnter.contains(child))
+ addStatesToEnter(child,lca,statesToEnter,statesForDefaultEntry);
+ }
+ }
+ }
+ }
+ }
+
+ // Did an error occur while selecting transitions? Then we enter the error state.
+ if (!pendingErrorStates.isEmpty()) {
+ statesToEnter.clear();
+ statesToEnter = pendingErrorStates;
+ statesForDefaultEntry = pendingErrorStatesForDefaultEntry;
+ pendingErrorStates.clear();
+ pendingErrorStatesForDefaultEntry.clear();
+ }
+
+ QList<QAbstractState*> statesToEnter_sorted = statesToEnter.toList();
+ qSort(statesToEnter_sorted.begin(), statesToEnter_sorted.end(), stateEntryLessThan);
+
+ for (int i = 0; i < statesToEnter_sorted.size(); ++i) {
+ QAbstractState *s = statesToEnter_sorted.at(i);
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q << ": entering" << s;
+#endif
+ configuration.insert(s);
+ registerTransitions(s);
+ QAbstractStatePrivate::get(s)->callOnEntry(event);
+ QAbstractStatePrivate::get(s)->emitEntered();
+ if (statesForDefaultEntry.contains(s)) {
+ // ### executeContent(s.initial.transition.children())
+ }
+ if (isFinal(s)) {
+ QState *parent = s->parentState();
+ if (parent) {
+ if (parent != rootState()) {
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q << ": emitting finished signal for" << parent;
+#endif
+ QStatePrivate::get(parent)->emitFinished();
+ }
+ QState *grandparent = parent->parentState();
+ if (grandparent && isParallel(grandparent)) {
+ bool allChildStatesFinal = true;
+ QList<QAbstractState*> childStates = QStatePrivate::get(grandparent)->childStates();
+ for (int j = 0; j < childStates.size(); ++j) {
+ QAbstractState *cs = childStates.at(j);
+ if (!isInFinalState(cs)) {
+ allChildStatesFinal = false;
+ break;
+ }
+ }
+ if (allChildStatesFinal && (grandparent != rootState())) {
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q << ": emitting finished signal for" << grandparent;
+#endif
+ QStatePrivate::get(grandparent)->emitFinished();
+ }
+ }
+ }
+ }
+ }
+ {
+ QSet<QAbstractState*>::const_iterator it;
+ for (it = configuration.constBegin(); it != configuration.constEnd(); ++it) {
+ if (isFinal(*it) && (*it)->parentState() == rootState()) {
+ processing = false;
+ stopProcessingReason = Finished;
+ break;
+ }
+ }
+ }
+// qDebug() << "configuration:" << configuration.toList();
+ return statesToEnter_sorted;
+}
+
+void QStateMachinePrivate::addStatesToEnter(QAbstractState *s, QState *root,
+ QSet<QAbstractState*> &statesToEnter,
+ QSet<QAbstractState*> &statesForDefaultEntry)
+{
+ if (QHistoryState *h = qobject_cast<QHistoryState*>(s)) {
+ QList<QAbstractState*> hconf = QHistoryStatePrivate::get(h)->configuration;
+ if (!hconf.isEmpty()) {
+ for (int k = 0; k < hconf.size(); ++k) {
+ QAbstractState *s0 = hconf.at(k);
+ addStatesToEnter(s0, root, statesToEnter, statesForDefaultEntry);
+ }
+ #ifdef QSTATEMACHINE_DEBUG
+ qDebug() <<q_func() << ": restoring"
+ << ((QHistoryStatePrivate::get(h)->historyType == QHistoryState::DeepHistory) ? "deep" : "shallow")
+ << "history from" << s << ':' << hconf;
+ #endif
+ } else {
+ QList<QAbstractState*> hlst;
+ if (QHistoryStatePrivate::get(h)->defaultState)
+ hlst.append(QHistoryStatePrivate::get(h)->defaultState);
+
+ if (hlst.isEmpty()) {
+ setError(QStateMachine::NoDefaultStateInHistoryStateError, h);
+ } else {
+ for (int k = 0; k < hlst.size(); ++k) {
+ QAbstractState *s0 = hlst.at(k);
+ addStatesToEnter(s0, root, statesToEnter, statesForDefaultEntry);
+ }
+ #ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q_func() << ": initial history targets for" << s << ':' << hlst;
+ #endif
+ }
+ }
+ } else {
+ if (s == rootState()) {
+ // Error has already been set by exitStates().
+ Q_ASSERT(error != QStateMachine::NoError);
+ return;
+ }
+ statesToEnter.insert(s);
+ if (isParallel(s)) {
+ QState *grp = qobject_cast<QState*>(s);
+ QList<QAbstractState*> lst = QStatePrivate::get(grp)->childStates();
+ for (int i = 0; i < lst.size(); ++i) {
+ QAbstractState *child = lst.at(i);
+ addStatesToEnter(child, grp, statesToEnter, statesForDefaultEntry);
+ }
+ } else if (isCompound(s)) {
+ statesForDefaultEntry.insert(s);
+ QState *grp = qobject_cast<QState*>(s);
+ QAbstractState *initial = grp->initialState();
+ if (initial != 0) {
+ Q_ASSERT(initial->machine() == q_func());
+ addStatesToEnter(initial, grp, statesToEnter, statesForDefaultEntry);
+ } else {
+ setError(QStateMachine::NoInitialStateError, grp);
+ return;
+ }
+ }
+ QList<QState*> ancs = properAncestors(s, root);
+ for (int i = 0; i < ancs.size(); ++i) {
+ QState *anc = ancs.at(i);
+ if (!anc->parentState())
+ continue;
+ statesToEnter.insert(anc);
+ if (isParallel(anc)) {
+ QList<QAbstractState*> lst = QStatePrivate::get(anc)->childStates();
+ for (int j = 0; j < lst.size(); ++j) {
+ QAbstractState *child = lst.at(j);
+ bool hasDescendantInList = false;
+ QSet<QAbstractState*>::const_iterator it;
+ for (it = statesToEnter.constBegin(); it != statesToEnter.constEnd(); ++it) {
+ if (isDescendantOf(*it, child)) {
+ hasDescendantInList = true;
+ break;
+ }
+ }
+ if (!hasDescendantInList)
+ addStatesToEnter(child, anc, statesToEnter, statesForDefaultEntry);
+ }
+ }
+ }
+ }
+}
+
+#ifndef QT_NO_PROPERTIES
+
+void QStateMachinePrivate::applyProperties(const QList<QAbstractTransition*> &transitionList,
+ const QList<QAbstractState*> &exitedStates,
+ const QList<QAbstractState*> &enteredStates)
+{
+#ifdef QT_NO_ANIMATION
+ Q_UNUSED(transitionList);
+ Q_UNUSED(exitedStates);
+#else
+ Q_Q(QStateMachine);
+#endif
+ // Process the property assignments of the entered states.
+ QHash<QAbstractState*, QList<QPropertyAssignment> > propertyAssignmentsForState;
+ QHash<RestorableId, QVariant> pendingRestorables = registeredRestorables;
+ for (int i = 0; i < enteredStates.size(); ++i) {
+ QState *s = qobject_cast<QState*>(enteredStates.at(i));
+ if (!s)
+ continue;
+
+ QList<QPropertyAssignment> assignments = QStatePrivate::get(s)->propertyAssignments;
+ for (int j = 0; j < assignments.size(); ++j) {
+ const QPropertyAssignment &assn = assignments.at(j);
+ if (globalRestorePolicy == QStateMachine::RestoreProperties) {
+ registerRestorable(assn.object, assn.propertyName);
+ }
+ pendingRestorables.remove(RestorableId(assn.object, assn.propertyName));
+ propertyAssignmentsForState[s].append(assn);
+ }
+
+ // Remove pending restorables for all parent states to avoid restoring properties
+ // before the state that assigned them is exited. If state does not explicitly
+ // assign a property which is assigned by the parent, it inherits the parent's assignment.
+ QState *parentState = s;
+ while ((parentState = parentState->parentState()) != 0) {
+ assignments = QStatePrivate::get(parentState)->propertyAssignments;
+ for (int j=0; j<assignments.size(); ++j) {
+ const QPropertyAssignment &assn = assignments.at(j);
+ int c = pendingRestorables.remove(RestorableId(assn.object, assn.propertyName));
+ if (c > 0)
+ propertyAssignmentsForState[s].append(assn);
+ }
+ }
+ }
+ if (!pendingRestorables.isEmpty()) {
+ QAbstractState *s;
+ if (!enteredStates.isEmpty())
+ s = enteredStates.last(); // ### handle if parallel
+ else
+ s = 0;
+ propertyAssignmentsForState[s] << restorablesToPropertyList(pendingRestorables);
+ }
+
+#ifndef QT_NO_ANIMATION
+ // Gracefully terminate playing animations for states that are exited.
+ for (int i = 0; i < exitedStates.size(); ++i) {
+ QAbstractState *s = exitedStates.at(i);
+ QList<QAbstractAnimation*> animations = animationsForState.take(s);
+ for (int j = 0; j < animations.size(); ++j) {
+ QAbstractAnimation *anim = animations.at(j);
+ QObject::disconnect(anim, SIGNAL(finished()), q, SLOT(_q_animationFinished()));
+ stateForAnimation.remove(anim);
+
+ // Stop the (top-level) animation.
+ // ### Stopping nested animation has weird behavior.
+ QAbstractAnimation *topLevelAnim = anim;
+ while (QAnimationGroup *group = topLevelAnim->group())
+ topLevelAnim = group;
+ topLevelAnim->stop();
+
+ if (resetAnimationEndValues.contains(anim)) {
+ qobject_cast<QVariantAnimation*>(anim)->setEndValue(QVariant()); // ### generalize
+ resetAnimationEndValues.remove(anim);
+ }
+ QPropertyAssignment assn = propertyForAnimation.take(anim);
+ Q_ASSERT(assn.object != 0);
+ // If there is no property assignment that sets this property,
+ // set the property to its target value.
+ bool found = false;
+ QHash<QAbstractState*, QList<QPropertyAssignment> >::const_iterator it;
+ for (it = propertyAssignmentsForState.constBegin(); it != propertyAssignmentsForState.constEnd(); ++it) {
+ const QList<QPropertyAssignment> &assignments = it.value();
+ for (int k = 0; k < assignments.size(); ++k) {
+ if ((assignments.at(k).object == assn.object)
+ && (assignments.at(k).propertyName == assn.propertyName)) {
+ found = true;
+ break;
+ }
+ }
+ }
+ if (!found) {
+ assn.object->setProperty(assn.propertyName, assn.value);
+ }
+ }
+ }
+
+ // Find the animations to use for the state change.
+ QList<QAbstractAnimation*> selectedAnimations;
+ if (animationsEnabled) {
+ for (int i = 0; i < transitionList.size(); ++i) {
+ QAbstractTransition *transition = transitionList.at(i);
+
+ selectedAnimations << transition->animations();
+ selectedAnimations << defaultAnimationsForSource.values(transition->sourceState());
+
+ QList<QAbstractState *> targetStates = transition->targetStates();
+ for (int j=0; j<targetStates.size(); ++j)
+ selectedAnimations << defaultAnimationsForTarget.values(targetStates.at(j));
+ }
+ selectedAnimations << defaultAnimations;
+ }
+
+ // Initialize animations from property assignments.
+ for (int i = 0; i < selectedAnimations.size(); ++i) {
+ QAbstractAnimation *anim = selectedAnimations.at(i);
+ QHash<QAbstractState*, QList<QPropertyAssignment> >::iterator it;
+ for (it = propertyAssignmentsForState.begin(); it != propertyAssignmentsForState.end(); ) {
+ QList<QPropertyAssignment>::iterator it2;
+ QAbstractState *s = it.key();
+ QList<QPropertyAssignment> &assignments = it.value();
+ for (it2 = assignments.begin(); it2 != assignments.end(); ) {
+ QPair<QList<QAbstractAnimation*>, QList<QAbstractAnimation*> > ret;
+ ret = initializeAnimation(anim, *it2);
+ QList<QAbstractAnimation*> handlers = ret.first;
+ if (!handlers.isEmpty()) {
+ for (int j = 0; j < handlers.size(); ++j) {
+ QAbstractAnimation *a = handlers.at(j);
+ propertyForAnimation.insert(a, *it2);
+ stateForAnimation.insert(a, s);
+ animationsForState[s].append(a);
+ // ### connect to just the top-level animation?
+ QObject::connect(a, SIGNAL(finished()), q, SLOT(_q_animationFinished()), Qt::UniqueConnection);
+ }
+ it2 = assignments.erase(it2);
+ } else {
+ ++it2;
+ }
+ for (int j = 0; j < ret.second.size(); ++j)
+ resetAnimationEndValues.insert(ret.second.at(j));
+ }
+ if (assignments.isEmpty())
+ it = propertyAssignmentsForState.erase(it);
+ else
+ ++it;
+ }
+ // We require that at least one animation is valid.
+ // ### generalize
+ QList<QVariantAnimation*> variantAnims = qFindChildren<QVariantAnimation*>(anim);
+ if (QVariantAnimation *va = qobject_cast<QVariantAnimation*>(anim))
+ variantAnims.append(va);
+
+ bool hasValidEndValue = false;
+ for (int j = 0; j < variantAnims.size(); ++j) {
+ if (variantAnims.at(j)->endValue().isValid()) {
+ hasValidEndValue = true;
+ break;
+ }
+ }
+
+ if (hasValidEndValue) {
+ if (anim->state() == QAbstractAnimation::Running) {
+ // The animation is still running. This can happen if the
+ // animation is a group, and one of its children just finished,
+ // and that caused a state to emit its polished() signal, and
+ // that triggered a transition in the machine.
+ // Just stop the animation so it is correctly restarted again.
+ anim->stop();
+ }
+ anim->start();
+ }
+ }
+#endif // !QT_NO_ANIMATION
+
+ // Immediately set the properties that are not animated.
+ {
+ QHash<QAbstractState*, QList<QPropertyAssignment> >::const_iterator it;
+ for (it = propertyAssignmentsForState.constBegin(); it != propertyAssignmentsForState.constEnd(); ++it) {
+ const QList<QPropertyAssignment> &assignments = it.value();
+ for (int i = 0; i < assignments.size(); ++i) {
+ const QPropertyAssignment &assn = assignments.at(i);
+ assn.object->setProperty(assn.propertyName, assn.value);
+ }
+ }
+ }
+
+ // Emit polished signal for entered states that have no animated properties.
+ for (int i = 0; i < enteredStates.size(); ++i) {
+ QState *s = qobject_cast<QState*>(enteredStates.at(i));
+ if (s
+#ifndef QT_NO_ANIMATION
+ && !animationsForState.contains(s)
+#endif
+ )
+ QStatePrivate::get(s)->emitPolished();
+ }
+}
+
+#endif // QT_NO_PROPERTIES
+
+bool QStateMachinePrivate::isFinal(const QAbstractState *s)
+{
+ return qobject_cast<const QFinalState*>(s) != 0;
+}
+
+bool QStateMachinePrivate::isParallel(const QAbstractState *s)
+{
+ const QState *ss = qobject_cast<const QState*>(s);
+ return ss && (QStatePrivate::get(ss)->childMode == QState::ParallelStates);
+}
+
+bool QStateMachinePrivate::isCompound(const QAbstractState *s) const
+{
+ const QState *group = qobject_cast<const QState*>(s);
+ if (!group)
+ return false;
+ bool isMachine = (qobject_cast<const QStateMachine*>(group) != 0);
+ // Don't treat the machine as compound if it's a sub-state of this machine
+ if (isMachine && (group != rootState()))
+ return false;
+ return (!isParallel(group) && !QStatePrivate::get(group)->childStates().isEmpty())
+ || isMachine;
+}
+
+bool QStateMachinePrivate::isAtomic(const QAbstractState *s) const
+{
+ const QState *ss = qobject_cast<const QState*>(s);
+ return (ss && QStatePrivate::get(ss)->childStates().isEmpty())
+ || isFinal(s)
+ // Treat the machine as atomic if it's a sub-state of this machine
+ || (ss && (qobject_cast<const QStateMachine*>(ss) != 0) && (ss != rootState()));
+}
+
+
+bool QStateMachinePrivate::isDescendantOf(const QAbstractState *state, const QAbstractState *other)
+{
+ Q_ASSERT(state != 0);
+ for (QAbstractState *s = state->parentState(); s != 0; s = s->parentState()) {
+ if (s == other)
+ return true;
+ }
+ return false;
+}
+
+QList<QState*> QStateMachinePrivate::properAncestors(const QAbstractState *state, const QState *upperBound)
+{
+ Q_ASSERT(state != 0);
+ QList<QState*> result;
+ for (QState *s = state->parentState(); s && s != upperBound; s = s->parentState()) {
+ result.append(s);
+ }
+ return result;
+}
+
+bool QStateMachinePrivate::isInFinalState(QAbstractState* s) const
+{
+ if (isCompound(s)) {
+ QState *grp = qobject_cast<QState*>(s);
+ QList<QAbstractState*> lst = QStatePrivate::get(grp)->childStates();
+ for (int i = 0; i < lst.size(); ++i) {
+ QAbstractState *cs = lst.at(i);
+ if (isFinal(cs) && configuration.contains(cs))
+ return true;
+ }
+ return false;
+ } else if (isParallel(s)) {
+ QState *grp = qobject_cast<QState*>(s);
+ QList<QAbstractState*> lst = QStatePrivate::get(grp)->childStates();
+ for (int i = 0; i < lst.size(); ++i) {
+ QAbstractState *cs = lst.at(i);
+ if (!isInFinalState(cs))
+ return false;
+ }
+ return true;
+ }
+ else
+ return false;
+}
+
+#ifndef QT_NO_PROPERTIES
+
+void QStateMachinePrivate::registerRestorable(QObject *object, const QByteArray &propertyName)
+{
+ RestorableId id(object, propertyName);
+ if (!registeredRestorables.contains(id))
+ registeredRestorables.insert(id, object->property(propertyName));
+}
+
+QList<QPropertyAssignment> QStateMachinePrivate::restorablesToPropertyList(const QHash<RestorableId, QVariant> &restorables) const
+{
+ QList<QPropertyAssignment> result;
+ QHash<RestorableId, QVariant>::const_iterator it;
+ for (it = restorables.constBegin(); it != restorables.constEnd(); ++it) {
+// qDebug() << "restorable:" << it.key().first << it.key().second << it.value();
+ result.append(QPropertyAssignment(it.key().first, it.key().second, it.value(), /*explicitlySet=*/false));
+ }
+ return result;
+}
+
+/*!
+ \internal
+ Returns true if the variable with the given \a id has been registered for restoration.
+*/
+bool QStateMachinePrivate::hasRestorable(QObject *object, const QByteArray &propertyName) const
+{
+ return registeredRestorables.contains(RestorableId(object, propertyName));
+}
+
+QVariant QStateMachinePrivate::restorableValue(QObject *object, const QByteArray &propertyName) const
+{
+ return registeredRestorables.value(RestorableId(object, propertyName), QVariant());
+}
+
+
+/*!
+ \internal
+ Unregisters the variable identified by \a id
+*/
+void QStateMachinePrivate::unregisterRestorable(QObject *object, const QByteArray &propertyName)
+{
+// qDebug() << "unregisterRestorable(" << object << propertyName << ')';
+ RestorableId id(object, propertyName);
+ registeredRestorables.remove(id);
+}
+
+#endif // QT_NO_PROPERTIES
+
+QAbstractState *QStateMachinePrivate::findErrorState(QAbstractState *context)
+{
+ // Find error state recursively in parent hierarchy if not set explicitly for context state
+ QAbstractState *errorState = 0;
+ if (context != 0) {
+ QState *s = qobject_cast<QState*>(context);
+ if (s != 0)
+ errorState = s->errorState();
+
+ if (errorState == 0)
+ errorState = findErrorState(context->parentState());
+ }
+
+ return errorState;
+}
+
+void QStateMachinePrivate::setError(QStateMachine::Error errorCode, QAbstractState *currentContext)
+{
+ Q_Q(QStateMachine);
+
+ error = errorCode;
+ switch (errorCode) {
+ case QStateMachine::NoInitialStateError:
+ Q_ASSERT(currentContext != 0);
+
+ errorString = QStateMachine::tr("Missing initial state in compound state '%1'")
+ .arg(currentContext->objectName());
+
+ break;
+ case QStateMachine::NoDefaultStateInHistoryStateError:
+ Q_ASSERT(currentContext != 0);
+
+ errorString = QStateMachine::tr("Missing default state in history state '%1'")
+ .arg(currentContext->objectName());
+ break;
+
+ case QStateMachine::NoCommonAncestorForTransitionError:
+ Q_ASSERT(currentContext != 0);
+
+ errorString = QStateMachine::tr("No common ancestor for targets and source of transition from state '%1'")
+ .arg(currentContext->objectName());
+ break;
+ default:
+ errorString = QStateMachine::tr("Unknown error");
+ };
+
+ pendingErrorStates.clear();
+ pendingErrorStatesForDefaultEntry.clear();
+
+ QAbstractState *currentErrorState = findErrorState(currentContext);
+
+ // Avoid infinite loop if the error state itself has an error
+ if (currentContext == currentErrorState)
+ currentErrorState = 0;
+
+ Q_ASSERT(currentErrorState != rootState());
+
+ if (currentErrorState != 0) {
+ QState *lca = findLCA(QList<QAbstractState*>() << currentErrorState << currentContext);
+ addStatesToEnter(currentErrorState, lca, pendingErrorStates, pendingErrorStatesForDefaultEntry);
+ } else {
+ qWarning("Unrecoverable error detected in running state machine: %s",
+ qPrintable(errorString));
+ q->stop();
+ }
+}
+
+#ifndef QT_NO_ANIMATION
+
+QPair<QList<QAbstractAnimation*>, QList<QAbstractAnimation*> >
+QStateMachinePrivate::initializeAnimation(QAbstractAnimation *abstractAnimation,
+ const QPropertyAssignment &prop)
+{
+ QList<QAbstractAnimation*> handledAnimations;
+ QList<QAbstractAnimation*> localResetEndValues;
+ QAnimationGroup *group = qobject_cast<QAnimationGroup*>(abstractAnimation);
+ if (group) {
+ for (int i = 0; i < group->animationCount(); ++i) {
+ QAbstractAnimation *animationChild = group->animationAt(i);
+ QPair<QList<QAbstractAnimation*>, QList<QAbstractAnimation*> > ret;
+ ret = initializeAnimation(animationChild, prop);
+ handledAnimations << ret.first;
+ localResetEndValues << ret.second;
+ }
+ } else {
+ QPropertyAnimation *animation = qobject_cast<QPropertyAnimation *>(abstractAnimation);
+ if (animation != 0
+ && prop.object == animation->targetObject()
+ && prop.propertyName == animation->propertyName()) {
+
+ // Only change end value if it is undefined
+ if (!animation->endValue().isValid()) {
+ animation->setEndValue(prop.value);
+ localResetEndValues.append(animation);
+ }
+ handledAnimations.append(animation);
+ }
+ }
+ return qMakePair(handledAnimations, localResetEndValues);
+}
+
+void QStateMachinePrivate::_q_animationFinished()
+{
+ Q_Q(QStateMachine);
+ QAbstractAnimation *anim = qobject_cast<QAbstractAnimation*>(q->sender());
+ Q_ASSERT(anim != 0);
+ QObject::disconnect(anim, SIGNAL(finished()), q, SLOT(_q_animationFinished()));
+ if (resetAnimationEndValues.contains(anim)) {
+ qobject_cast<QVariantAnimation*>(anim)->setEndValue(QVariant()); // ### generalize
+ resetAnimationEndValues.remove(anim);
+ }
+
+#ifndef QT_NO_PROPERTIES
+ // Set the final property value.
+ QPropertyAssignment assn = propertyForAnimation.take(anim);
+ Q_ASSERT(assn.object != 0);
+ assn.object->setProperty(assn.propertyName, assn.value);
+ if (!assn.explicitlySet)
+ unregisterRestorable(assn.object, assn.propertyName);
+#endif
+
+ QAbstractState *state = stateForAnimation.take(anim);
+ Q_ASSERT(state != 0);
+ QHash<QAbstractState*, QList<QAbstractAnimation*> >::iterator it;
+ it = animationsForState.find(state);
+ Q_ASSERT(it != animationsForState.end());
+ QList<QAbstractAnimation*> &animations = it.value();
+ animations.removeOne(anim);
+ if (animations.isEmpty()) {
+ animationsForState.erase(it);
+ QStatePrivate::get(qobject_cast<QState*>(state))->emitPolished();
+ }
+}
+
+#endif // !QT_NO_ANIMATION
+
+namespace {
+
+class StartState : public QState
+{
+public:
+ StartState(QState *parent)
+ : QState(parent) {}
+protected:
+ void onEntry(QEvent *) {}
+ void onExit(QEvent *) {}
+};
+
+class InitialTransition : public QAbstractTransition
+{
+public:
+ InitialTransition(QAbstractState *target)
+ : QAbstractTransition()
+ { setTargetState(target); }
+protected:
+ virtual bool eventTest(QEvent *) { return true; }
+ virtual void onTransition(QEvent *) {}
+};
+
+} // namespace
+
+QState *QStateMachinePrivate::startState()
+{
+ Q_Q(QStateMachine);
+ if (_startState == 0)
+ _startState = new StartState(q);
+ return _startState;
+}
+
+void QStateMachinePrivate::removeStartState()
+{
+ delete _startState;
+ _startState = 0;
+}
+
+void QStateMachinePrivate::_q_start()
+{
+ Q_Q(QStateMachine);
+ Q_ASSERT(state == Starting);
+ Q_ASSERT(rootState() != 0);
+ QAbstractState *initial = rootState()->initialState();
+ configuration.clear();
+ qDeleteAll(internalEventQueue);
+ internalEventQueue.clear();
+ qDeleteAll(externalEventQueue);
+ externalEventQueue.clear();
+
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q << ": starting";
+#endif
+ state = Running;
+ processingScheduled = true; // we call _q_process() below
+ emit q->started();
+
+ QState *start = startState();
+ Q_ASSERT(start != 0);
+
+ QList<QAbstractTransition*> transitions = QStatePrivate::get(start)->transitions();
+
+ // If a transition has already been added, then we skip this step, as the
+ // initial transition in that case has been overridden.
+ if (transitions.isEmpty()) {
+ QAbstractTransition *initialTransition = new InitialTransition(initial);
+ start->addTransition(initialTransition);
+ transitions.append(initialTransition);
+ }
+
+ QEvent nullEvent(QEvent::None);
+ executeTransitionContent(&nullEvent, transitions);
+ QList<QAbstractState*> enteredStates = enterStates(&nullEvent, transitions);
+#ifndef QT_NO_PROPERTIES
+ applyProperties(transitions, QList<QAbstractState*>() << start,
+ enteredStates);
+#endif
+ removeStartState();
+
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q << ": initial configuration:" << configuration;
+#endif
+ _q_process();
+}
+
+void QStateMachinePrivate::_q_process()
+{
+ Q_Q(QStateMachine);
+ Q_ASSERT(state == Running);
+ Q_ASSERT(!processing);
+ processing = true;
+ processingScheduled = false;
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q << ": starting the event processing loop";
+#endif
+ while (processing) {
+ if (stop) {
+ stop = false;
+ processing = false;
+ stopProcessingReason = Stopped;
+ break;
+ }
+ QSet<QAbstractTransition*> enabledTransitions;
+ QEvent *e = new QEvent(QEvent::None);
+ enabledTransitions = selectTransitions(e);
+ if (enabledTransitions.isEmpty()) {
+ delete e;
+ e = 0;
+ }
+ if (enabledTransitions.isEmpty() && !internalEventQueue.isEmpty()) {
+ e = internalEventQueue.takeFirst();
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q << ": dequeued internal event" << e << "of type" << e->type();
+#endif
+ enabledTransitions = selectTransitions(e);
+ if (enabledTransitions.isEmpty()) {
+ delete e;
+ e = 0;
+ }
+ }
+ if (enabledTransitions.isEmpty()) {
+ if (externalEventQueue.isEmpty()) {
+ if (internalEventQueue.isEmpty()) {
+ processing = false;
+ stopProcessingReason = EventQueueEmpty;
+ }
+ } else {
+ e = externalEventQueue.takeFirst();
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q << ": dequeued external event" << e << "of type" << e->type();
+#endif
+ enabledTransitions = selectTransitions(e);
+ if (enabledTransitions.isEmpty()) {
+ delete e;
+ e = 0;
+ }
+ }
+ }
+ if (!enabledTransitions.isEmpty()) {
+ q->beginMicrostep(e);
+ microstep(e, enabledTransitions.toList());
+ q->endMicrostep(e);
+ }
+#ifdef QSTATEMACHINE_DEBUG
+ else {
+ qDebug() << q << ": no transitions enabled";
+ }
+#endif
+ delete e;
+ }
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q << ": finished the event processing loop";
+#endif
+ switch (stopProcessingReason) {
+ case EventQueueEmpty:
+ break;
+ case Finished:
+ state = NotRunning;
+ cancelAllDelayedEvents();
+ unregisterAllTransitions();
+ emit q->finished();
+ break;
+ case Stopped:
+ state = NotRunning;
+ cancelAllDelayedEvents();
+ unregisterAllTransitions();
+ emit q->stopped();
+ break;
+ }
+}
+
+void QStateMachinePrivate::processEvents(EventProcessingMode processingMode)
+{
+ if ((state != Running) || processing || processingScheduled)
+ return;
+ switch (processingMode) {
+ case DirectProcessing:
+ _q_process();
+ break;
+ case QueuedProcessing:
+ processingScheduled = true;
+ QMetaObject::invokeMethod(q_func(), "_q_process", Qt::QueuedConnection);
+ break;
+ }
+}
+
+void QStateMachinePrivate::cancelAllDelayedEvents()
+{
+ Q_Q(QStateMachine);
+ QHash<int, QEvent*>::const_iterator it;
+ for (it = delayedEvents.constBegin(); it != delayedEvents.constEnd(); ++it) {
+ int id = it.key();
+ QEvent *e = it.value();
+ q->killTimer(id);
+ delete e;
+ }
+ delayedEvents.clear();
+}
+
+namespace {
+
+class GoToStateTransition : public QAbstractTransition
+{
+public:
+ GoToStateTransition(QAbstractState *target)
+ : QAbstractTransition()
+ { setTargetState(target); }
+protected:
+ void onTransition(QEvent *) { deleteLater(); }
+ bool eventTest(QEvent *) { return true; }
+};
+
+} // namespace
+
+/*!
+ \internal
+
+ Causes this state machine to unconditionally transition to the given
+ \a targetState.
+
+ Provides a backdoor for using the state machine "imperatively"; i.e. rather
+ than defining explicit transitions, you drive the machine's execution by
+ calling this function. It breaks the whole integrity of the
+ transition-driven model, but is provided for pragmatic reasons.
+*/
+void QStateMachinePrivate::goToState(QAbstractState *targetState)
+{
+ if (!targetState) {
+ qWarning("QStateMachine::goToState(): cannot go to null state");
+ return;
+ }
+
+ if (configuration.contains(targetState))
+ return;
+
+ QState *sourceState = 0;
+ if (state == Running) {
+ QSet<QAbstractState*>::const_iterator it;
+ for (it = configuration.constBegin(); it != configuration.constEnd(); ++it) {
+ sourceState = qobject_cast<QState*>(*it);
+ if (sourceState != 0)
+ break;
+ }
+ } else {
+ sourceState = startState();
+ }
+
+ Q_ASSERT(sourceState != 0);
+ // Reuse previous GoToStateTransition in case of several calls to
+ // goToState() in a row.
+ GoToStateTransition *trans = qFindChild<GoToStateTransition*>(sourceState);
+ if (!trans) {
+ trans = new GoToStateTransition(targetState);
+ sourceState->addTransition(trans);
+ } else {
+ trans->setTargetState(targetState);
+ }
+
+ processEvents(QueuedProcessing);
+}
+
+void QStateMachinePrivate::registerTransitions(QAbstractState *state)
+{
+ QState *group = qobject_cast<QState*>(state);
+ if (!group)
+ return;
+ QList<QAbstractTransition*> transitions = QStatePrivate::get(group)->transitions();
+ for (int i = 0; i < transitions.size(); ++i) {
+ QAbstractTransition *t = transitions.at(i);
+ if (QSignalTransition *st = qobject_cast<QSignalTransition*>(t)) {
+ registerSignalTransition(st);
+ }
+#ifndef QT_NO_STATEMACHINE_EVENTFILTER
+ else if (QEventTransition *oet = qobject_cast<QEventTransition*>(t)) {
+ registerEventTransition(oet);
+ }
+#endif
+ }
+}
+
+void QStateMachinePrivate::unregisterTransition(QAbstractTransition *transition)
+{
+ if (QSignalTransition *st = qobject_cast<QSignalTransition*>(transition)) {
+ unregisterSignalTransition(st);
+ }
+#ifndef QT_NO_STATEMACHINE_EVENTFILTER
+ else if (QEventTransition *oet = qobject_cast<QEventTransition*>(transition)) {
+ unregisterEventTransition(oet);
+ }
+#endif
+}
+
+void QStateMachinePrivate::registerSignalTransition(QSignalTransition *transition)
+{
+ Q_Q(QStateMachine);
+ if (QSignalTransitionPrivate::get(transition)->signalIndex != -1)
+ return; // already registered
+ QObject *sender = QSignalTransitionPrivate::get(transition)->sender;
+ if (!sender)
+ return;
+ QByteArray signal = QSignalTransitionPrivate::get(transition)->signal;
+ if (signal.startsWith('0'+QSIGNAL_CODE))
+ signal.remove(0, 1);
+ const QMetaObject *meta = sender->metaObject();
+ int signalIndex = meta->indexOfSignal(signal);
+ int originalSignalIndex = signalIndex;
+ if (signalIndex == -1) {
+ signalIndex = meta->indexOfSignal(QMetaObject::normalizedSignature(signal));
+ if (signalIndex == -1) {
+ qWarning("QSignalTransition: no such signal: %s::%s",
+ meta->className(), signal.constData());
+ return;
+ }
+ }
+ // The signal index we actually want to connect to is the one
+ // that is going to be sent, i.e. the non-cloned original index.
+ while (meta->method(signalIndex).attributes() & QMetaMethod::Cloned)
+ --signalIndex;
+
+ QVector<int> &connectedSignalIndexes = connections[sender];
+ if (connectedSignalIndexes.size() <= signalIndex)
+ connectedSignalIndexes.resize(signalIndex+1);
+ if (connectedSignalIndexes.at(signalIndex) == 0) {
+ if (!signalEventGenerator)
+ signalEventGenerator = new QSignalEventGenerator(q);
+ bool ok = QMetaObject::connect(sender, signalIndex, signalEventGenerator,
+ signalEventGenerator->metaObject()->methodOffset());
+ if (!ok) {
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q << ": FAILED to add signal transition from" << transition->sourceState()
+ << ": ( sender =" << sender << ", signal =" << signal
+ << ", targets =" << transition->targetStates() << ')';
+#endif
+ return;
+ }
+ }
+ ++connectedSignalIndexes[signalIndex];
+ QSignalTransitionPrivate::get(transition)->signalIndex = signalIndex;
+ QSignalTransitionPrivate::get(transition)->originalSignalIndex = originalSignalIndex;
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q << ": added signal transition from" << transition->sourceState()
+ << ": ( sender =" << sender << ", signal =" << signal
+ << ", targets =" << transition->targetStates() << ')';
+#endif
+}
+
+void QStateMachinePrivate::unregisterSignalTransition(QSignalTransition *transition)
+{
+ int signalIndex = QSignalTransitionPrivate::get(transition)->signalIndex;
+ if (signalIndex == -1)
+ return; // not registered
+ QSignalTransitionPrivate::get(transition)->signalIndex = -1;
+ const QObject *sender = QSignalTransitionPrivate::get(transition)->sender;
+ QVector<int> &connectedSignalIndexes = connections[sender];
+ Q_ASSERT(connectedSignalIndexes.size() > signalIndex);
+ Q_ASSERT(connectedSignalIndexes.at(signalIndex) != 0);
+ if (--connectedSignalIndexes[signalIndex] == 0) {
+ Q_ASSERT(signalEventGenerator != 0);
+ QMetaObject::disconnect(sender, signalIndex, signalEventGenerator,
+ signalEventGenerator->metaObject()->methodOffset());
+ int sum = 0;
+ for (int i = 0; i < connectedSignalIndexes.size(); ++i)
+ sum += connectedSignalIndexes.at(i);
+ if (sum == 0)
+ connections.remove(sender);
+ }
+}
+
+void QStateMachinePrivate::unregisterAllTransitions()
+{
+ Q_Q(QStateMachine);
+ {
+ QList<QSignalTransition*> transitions = qFindChildren<QSignalTransition*>(rootState());
+ for (int i = 0; i < transitions.size(); ++i) {
+ QSignalTransition *t = transitions.at(i);
+ if (t->machine() == q)
+ unregisterSignalTransition(t);
+ }
+ }
+ {
+ QList<QEventTransition*> transitions = qFindChildren<QEventTransition*>(rootState());
+ for (int i = 0; i < transitions.size(); ++i) {
+ QEventTransition *t = transitions.at(i);
+ if (t->machine() == q)
+ unregisterEventTransition(t);
+ }
+ }
+}
+
+#ifndef QT_NO_STATEMACHINE_EVENTFILTER
+void QStateMachinePrivate::registerEventTransition(QEventTransition *transition)
+{
+ Q_Q(QStateMachine);
+ if (QEventTransitionPrivate::get(transition)->registered)
+ return;
+ if (transition->eventType() >= QEvent::User) {
+ qWarning("QObject event transitions are not supported for custom types");
+ return;
+ }
+ QObject *object = QEventTransitionPrivate::get(transition)->object;
+ if (!object)
+ return;
+ QObjectPrivate *od = QObjectPrivate::get(object);
+ if (!od->eventFilters.contains(q))
+ object->installEventFilter(q);
+ ++qobjectEvents[object][transition->eventType()];
+ QEventTransitionPrivate::get(transition)->registered = true;
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q << ": added event transition from" << transition->sourceState()
+ << ": ( object =" << object << ", event =" << transition->eventType()
+ << ", targets =" << transition->targetStates() << ')';
+#endif
+}
+
+void QStateMachinePrivate::unregisterEventTransition(QEventTransition *transition)
+{
+ Q_Q(QStateMachine);
+ if (!QEventTransitionPrivate::get(transition)->registered)
+ return;
+ QObject *object = QEventTransitionPrivate::get(transition)->object;
+ QHash<QEvent::Type, int> &events = qobjectEvents[object];
+ Q_ASSERT(events.value(transition->eventType()) > 0);
+ if (--events[transition->eventType()] == 0) {
+ events.remove(transition->eventType());
+ int sum = 0;
+ QHash<QEvent::Type, int>::const_iterator it;
+ for (it = events.constBegin(); it != events.constEnd(); ++it)
+ sum += it.value();
+ if (sum == 0) {
+ qobjectEvents.remove(object);
+ object->removeEventFilter(q);
+ }
+ }
+ QEventTransitionPrivate::get(transition)->registered = false;
+}
+
+void QStateMachinePrivate::handleFilteredEvent(QObject *watched, QEvent *event)
+{
+ Q_ASSERT(qobjectEvents.contains(watched));
+ if (qobjectEvents[watched].contains(event->type())) {
+ internalEventQueue.append(new QStateMachine::WrappedEvent(watched, handler->cloneEvent(event)));
+ processEvents(DirectProcessing);
+ }
+}
+#endif
+
+void QStateMachinePrivate::handleTransitionSignal(QObject *sender, int signalIndex,
+ void **argv)
+{
+ Q_ASSERT(connections[sender].at(signalIndex) != 0);
+ const QMetaObject *meta = sender->metaObject();
+ QMetaMethod method = meta->method(signalIndex);
+ QList<QByteArray> parameterTypes = method.parameterTypes();
+ int argc = parameterTypes.count();
+ QList<QVariant> vargs;
+ for (int i = 0; i < argc; ++i) {
+ int type = QMetaType::type(parameterTypes.at(i));
+ vargs.append(QVariant(type, argv[i+1]));
+ }
+
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << q_func() << ": sending signal event ( sender =" << sender
+ << ", signal =" << sender->metaObject()->method(signalIndex).signature() << ')';
+#endif
+ internalEventQueue.append(new QStateMachine::SignalEvent(sender, signalIndex, vargs));
+ processEvents(DirectProcessing);
+}
+
+/*!
+ Constructs a new state machine with the given \a parent.
+*/
+QStateMachine::QStateMachine(QObject *parent)
+ : QState(*new QStateMachinePrivate, /*parentState=*/0)
+{
+ // Can't pass the parent to the QState constructor, as it expects a QState
+ // But this works as expected regardless of whether parent is a QState or not
+ setParent(parent);
+}
+
+/*!
+ \internal
+*/
+QStateMachine::QStateMachine(QStateMachinePrivate &dd, QObject *parent)
+ : QState(dd, /*parentState=*/0)
+{
+ setParent(parent);
+}
+
+/*!
+ Destroys this state machine.
+*/
+QStateMachine::~QStateMachine()
+{
+}
+
+/*!
+ \enum QStateMachine::EventPriority
+
+ This enum type specifies the priority of an event posted to the state
+ machine using postEvent().
+
+ Events of high priority are processed before events of normal priority.
+
+ \value NormalPriority The event has normal priority.
+ \value HighPriority The event has high priority.
+*/
+
+/*! \enum QStateMachine::Error
+
+ This enum type defines errors that can occur in the state machine at run time. When the state
+ machine encounters an unrecoverable error at run time, it will set the error code returned
+ by error(), the error message returned by errorString(), and enter an error state based on
+ the context of the error.
+
+ \value NoError No error has occurred.
+ \value NoInitialStateError The machine has entered a QState with children which does not have an
+ initial state set. The context of this error is the state which is missing an initial
+ state.
+ \value NoDefaultStateInHistoryStateError The machine has entered a QHistoryState which does not have
+ a default state set. The context of this error is the QHistoryState which is missing a
+ default state.
+ \value NoCommonAncestorForTransitionError The machine has selected a transition whose source
+ and targets are not part of the same tree of states, and thus are not part of the same
+ state machine. Commonly, this could mean that one of the states has not been given
+ any parent or added to any machine. The context of this error is the source state of
+ the transition.
+
+ \sa setErrorState()
+*/
+
+/*!
+ \enum QStateMachine::RestorePolicy
+
+ This enum specifies the restore policy type. The restore policy
+ takes effect when the machine enters a state which sets one or more
+ properties. If the restore policy is set to RestoreProperties,
+ the state machine will save the original value of the property before the
+ new value is set.
+
+ Later, when the machine either enters a state which does not set
+ a value for the given property, the property will automatically be restored
+ to its initial value.
+
+ Only one initial value will be saved for any given property. If a value for a property has
+ already been saved by the state machine, it will not be overwritten until the property has been
+ successfully restored.
+
+ \value DoNotRestoreProperties The state machine should not save the initial values of properties
+ and restore them later.
+ \value RestoreProperties The state machine should save the initial values of properties
+ and restore them later.
+
+ \sa QStateMachine::globalRestorePolicy QState::assignProperty()
+*/
+
+
+/*!
+ Returns the error code of the last error that occurred in the state machine.
+*/
+QStateMachine::Error QStateMachine::error() const
+{
+ Q_D(const QStateMachine);
+ return d->error;
+}
+
+/*!
+ Returns the error string of the last error that occurred in the state machine.
+*/
+QString QStateMachine::errorString() const
+{
+ Q_D(const QStateMachine);
+ return d->errorString;
+}
+
+/*!
+ Clears the error string and error code of the state machine.
+*/
+void QStateMachine::clearError()
+{
+ Q_D(QStateMachine);
+ d->errorString.clear();
+ d->error = NoError;
+}
+
+/*!
+ Returns the restore policy of the state machine.
+
+ \sa setGlobalRestorePolicy()
+*/
+QStateMachine::RestorePolicy QStateMachine::globalRestorePolicy() const
+{
+ Q_D(const QStateMachine);
+ return d->globalRestorePolicy;
+}
+
+/*!
+ Sets the restore policy of the state machine to \a restorePolicy. The default
+ restore policy is QAbstractState::DoNotRestoreProperties.
+
+ \sa globalRestorePolicy()
+*/
+void QStateMachine::setGlobalRestorePolicy(QStateMachine::RestorePolicy restorePolicy)
+{
+ Q_D(QStateMachine);
+ d->globalRestorePolicy = restorePolicy;
+}
+
+/*!
+ Adds the given \a state to this state machine. The state becomes a top-level
+ state.
+
+ If the state is already in a different machine, it will first be removed
+ from its old machine, and then added to this machine.
+
+ \sa removeState(), setInitialState()
+*/
+void QStateMachine::addState(QAbstractState *state)
+{
+ if (!state) {
+ qWarning("QStateMachine::addState: cannot add null state");
+ return;
+ }
+ if (QAbstractStatePrivate::get(state)->machine() == this) {
+ qWarning("QStateMachine::addState: state has already been added to this machine");
+ return;
+ }
+ state->setParent(this);
+}
+
+/*!
+ Removes the given \a state from this state machine. The state machine
+ releases ownership of the state.
+
+ \sa addState()
+*/
+void QStateMachine::removeState(QAbstractState *state)
+{
+ if (!state) {
+ qWarning("QStateMachine::removeState: cannot remove null state");
+ return;
+ }
+ if (QAbstractStatePrivate::get(state)->machine() != this) {
+ qWarning("QStateMachine::removeState: state %p's machine (%p)"
+ " is different from this machine (%p)",
+ state, QAbstractStatePrivate::get(state)->machine(), this);
+ return;
+ }
+ state->setParent(0);
+}
+
+/*!
+ Returns whether this state machine is running.
+
+ start(), stop()
+*/
+bool QStateMachine::isRunning() const
+{
+ Q_D(const QStateMachine);
+ return (d->state == QStateMachinePrivate::Running);
+}
+
+/*!
+ Starts this state machine. The machine will reset its configuration and
+ transition to the initial state. When a final top-level state (QFinalState)
+ is entered, the machine will emit the finished() signal.
+
+ \note A state machine will not run without a running event loop, such as
+ the main application event loop started with QCoreApplication::exec() or
+ QApplication::exec().
+
+ \sa started(), finished(), stop(), initialState()
+*/
+void QStateMachine::start()
+{
+ Q_D(QStateMachine);
+
+ if (initialState() == 0) {
+ qWarning("QStateMachine::start: No initial state set for machine. Refusing to start.");
+ return;
+ }
+
+ switch (d->state) {
+ case QStateMachinePrivate::NotRunning:
+ d->state = QStateMachinePrivate::Starting;
+ QMetaObject::invokeMethod(this, "_q_start", Qt::QueuedConnection);
+ break;
+ case QStateMachinePrivate::Starting:
+ break;
+ case QStateMachinePrivate::Running:
+ qWarning("QStateMachine::start(): already running");
+ break;
+ }
+}
+
+/*!
+ Stops this state machine. The state machine will stop processing events and
+ then emit the stopped() signal.
+
+ \sa stopped(), start()
+*/
+void QStateMachine::stop()
+{
+ Q_D(QStateMachine);
+ switch (d->state) {
+ case QStateMachinePrivate::NotRunning:
+ break;
+ case QStateMachinePrivate::Starting:
+ // the machine will exit as soon as it enters the event processing loop
+ d->stop = true;
+ break;
+ case QStateMachinePrivate::Running:
+ d->stop = true;
+ d->processEvents(QStateMachinePrivate::QueuedProcessing);
+ break;
+ }
+}
+
+/*!
+ Posts the given \a event of the given \a priority for processing by this
+ state machine.
+
+ This function returns immediately. The event is added to the state machine's
+ event queue. Events are processed in the order posted. The state machine
+ takes ownership of the event and deletes it once it has been processed.
+
+ You can only post events when the state machine is running.
+
+ \sa postDelayedEvent()
+*/
+void QStateMachine::postEvent(QEvent *event, EventPriority priority)
+{
+ Q_D(QStateMachine);
+ if (d->state != QStateMachinePrivate::Running) {
+ qWarning("QStateMachine::postEvent: cannot post event when the state machine is not running");
+ return;
+ }
+ if (!event) {
+ qWarning("QStateMachine::postEvent: cannot post null event");
+ return;
+ }
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << this << ": posting event" << event;
+#endif
+ switch (priority) {
+ case NormalPriority:
+ d->externalEventQueue.append(event);
+ break;
+ case HighPriority:
+ d->internalEventQueue.append(event);
+ break;
+ }
+ d->processEvents(QStateMachinePrivate::QueuedProcessing);
+}
+
+/*!
+ Posts the given \a event for processing by this state machine, with the
+ given \a delay in milliseconds. Returns an identifier associated with the
+ delayed event, or -1 if the event could not be posted.
+
+ This function returns immediately. When the delay has expired, the event
+ will be added to the state machine's event queue for processing. The state
+ machine takes ownership of the event and deletes it once it has been
+ processed.
+
+ You can only post events when the state machine is running.
+
+ \sa cancelDelayedEvent(), postEvent()
+*/
+int QStateMachine::postDelayedEvent(QEvent *event, int delay)
+{
+ Q_D(QStateMachine);
+ if (d->state != QStateMachinePrivate::Running) {
+ qWarning("QStateMachine::postDelayedEvent: cannot post event when the state machine is not running");
+ return -1;
+ }
+ if (!event) {
+ qWarning("QStateMachine::postDelayedEvent: cannot post null event");
+ return -1;
+ }
+ if (delay < 0) {
+ qWarning("QStateMachine::postDelayedEvent: delay cannot be negative");
+ return -1;
+ }
+#ifdef QSTATEMACHINE_DEBUG
+ qDebug() << this << ": posting event" << event << "with delay" << delay;
+#endif
+ int tid = startTimer(delay);
+ d->delayedEvents[tid] = event;
+ return tid;
+}
+
+/*!
+ Cancels the delayed event identified by the given \a id. The id should be a
+ value returned by a call to postDelayedEvent(). Returns true if the event
+ was successfully cancelled, otherwise returns false.
+
+ \sa postDelayedEvent()
+*/
+bool QStateMachine::cancelDelayedEvent(int id)
+{
+ Q_D(QStateMachine);
+ if (d->state != QStateMachinePrivate::Running) {
+ qWarning("QStateMachine::cancelDelayedEvent: the machine is not running");
+ return false;
+ }
+ QEvent *e = d->delayedEvents.take(id);
+ if (!e)
+ return false;
+ killTimer(id);
+ delete e;
+ return true;
+}
+
+/*!
+ \internal
+
+ Returns the maximal consistent set of states (including parallel and final
+ states) that this state machine is currently in. If a state \c s is in the
+ configuration, it is always the case that the parent of \c s is also in
+ c. Note, however, that the machine itself is not an explicit member of the
+ configuration.
+*/
+QSet<QAbstractState*> QStateMachine::configuration() const
+{
+ Q_D(const QStateMachine);
+ return d->configuration;
+}
+
+/*!
+ \fn QStateMachine::started()
+
+ This signal is emitted when the state machine has entered its initial state
+ (QStateMachine::initialState).
+
+ \sa QStateMachine::finished(), QStateMachine::start()
+*/
+
+/*!
+ \fn QStateMachine::stopped()
+
+ This signal is emitted when the state machine has stopped.
+
+ \sa QStateMachine::stop(), QStateMachine::finished()
+*/
+
+/*!
+ \reimp
+*/
+bool QStateMachine::event(QEvent *e)
+{
+ Q_D(QStateMachine);
+ if (e->type() == QEvent::Timer) {
+ QTimerEvent *te = static_cast<QTimerEvent*>(e);
+ int tid = te->timerId();
+ if (d->state != QStateMachinePrivate::Running) {
+ // This event has been cancelled already
+ Q_ASSERT(!d->delayedEvents.contains(tid));
+ return true;
+ }
+ QEvent *ee = d->delayedEvents.take(tid);
+ if (ee != 0) {
+ killTimer(tid);
+ d->externalEventQueue.append(ee);
+ d->processEvents(QStateMachinePrivate::DirectProcessing);
+ return true;
+ }
+ }
+ return QObject::event(e);
+}
+
+#ifndef QT_NO_STATEMACHINE_EVENTFILTER
+/*!
+ \reimp
+*/
+bool QStateMachine::eventFilter(QObject *watched, QEvent *event)
+{
+ Q_D(QStateMachine);
+ d->handleFilteredEvent(watched, event);
+ return false;
+}
+#endif
+
+/*!
+ \internal
+
+ This function is called when the state machine is about to select
+ transitions based on the given \a event.
+
+ The default implementation does nothing.
+*/
+void QStateMachine::beginSelectTransitions(QEvent *event)
+{
+ Q_UNUSED(event);
+}
+
+/*!
+ \internal
+
+ This function is called when the state machine has finished selecting
+ transitions based on the given \a event.
+
+ The default implementation does nothing.
+*/
+void QStateMachine::endSelectTransitions(QEvent *event)
+{
+ Q_UNUSED(event);
+}
+
+/*!
+ \internal
+
+ This function is called when the state machine is about to do a microstep.
+
+ The default implementation does nothing.
+*/
+void QStateMachine::beginMicrostep(QEvent *event)
+{
+ Q_UNUSED(event);
+}
+
+/*!
+ \internal
+
+ This function is called when the state machine has finished doing a
+ microstep.
+
+ The default implementation does nothing.
+*/
+void QStateMachine::endMicrostep(QEvent *event)
+{
+ Q_UNUSED(event);
+}
+
+/*!
+ \reimp
+*/
+void QStateMachine::onEntry(QEvent *event)
+{
+ start();
+ QState::onEntry(event);
+}
+
+/*!
+ \reimp
+*/
+void QStateMachine::onExit(QEvent *event)
+{
+ stop();
+ QState::onExit(event);
+}
+
+#ifndef QT_NO_ANIMATION
+
+/*!
+ Returns whether animations are enabled for this state machine.
+*/
+bool QStateMachine::animationsEnabled() const
+{
+ Q_D(const QStateMachine);
+ return d->animationsEnabled;
+}
+
+/*!
+ Sets whether animations are \a enabled for this state machine.
+*/
+void QStateMachine::setAnimationsEnabled(bool enabled)
+{
+ Q_D(QStateMachine);
+ d->animationsEnabled = enabled;
+}
+
+/*!
+ Adds a default \a animation to be considered for any transition.
+*/
+void QStateMachine::addDefaultAnimation(QAbstractAnimation *animation)
+{
+ Q_D(QStateMachine);
+ d->defaultAnimations.append(animation);
+}
+
+/*!
+ Returns the list of default animations that will be considered for any transition.
+*/
+QList<QAbstractAnimation*> QStateMachine::defaultAnimations() const
+{
+ Q_D(const QStateMachine);
+ return d->defaultAnimations;
+}
+
+/*!
+ Removes \a animation from the list of default animations.
+*/
+void QStateMachine::removeDefaultAnimation(QAbstractAnimation *animation)
+{
+ Q_D(QStateMachine);
+ d->defaultAnimations.removeAll(animation);
+}
+
+#endif // QT_NO_ANIMATION
+
+
+static const uint qt_meta_data_QSignalEventGenerator[] = {
+
+ // content:
+ 2, // revision
+ 0, // classname
+ 0, 0, // classinfo
+ 1, 12, // methods
+ 0, 0, // properties
+ 0, 0, // enums/sets
+ 0, 0, // constructors
+
+ // slots: signature, parameters, type, tag, flags
+ 23, 22, 22, 22, 0x0a,
+
+ 0 // eod
+};
+
+static const char qt_meta_stringdata_QSignalEventGenerator[] = {
+ "QSignalEventGenerator\0\0execute()\0"
+};
+
+const QMetaObject QSignalEventGenerator::staticMetaObject = {
+ { &QObject::staticMetaObject, qt_meta_stringdata_QSignalEventGenerator,
+ qt_meta_data_QSignalEventGenerator, 0 }
+};
+
+const QMetaObject *QSignalEventGenerator::metaObject() const
+{
+ return &staticMetaObject;
+}
+
+void *QSignalEventGenerator::qt_metacast(const char *_clname)
+{
+ if (!_clname) return 0;
+ if (!strcmp(_clname, qt_meta_stringdata_QSignalEventGenerator))
+ return static_cast<void*>(const_cast< QSignalEventGenerator*>(this));
+ return QObject::qt_metacast(_clname);
+}
+
+int QSignalEventGenerator::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
+{
+ _id = QObject::qt_metacall(_c, _id, _a);
+ if (_id < 0)
+ return _id;
+ if (_c == QMetaObject::InvokeMetaMethod) {
+ switch (_id) {
+ case 0: {
+// ### in Qt 4.6 we can use QObject::senderSignalIndex()
+ QObjectPrivate *d = static_cast<QObjectPrivate *>(d_ptr.data());
+ int signalIndex = -1;
+ QObject *sender = this->sender();
+ if (sender && d->currentSender)
+ signalIndex = d->currentSender->signal;
+
+ Q_ASSERT(signalIndex != -1);
+ QStateMachine *machine = qobject_cast<QStateMachine*>(parent());
+ QStateMachinePrivate::get(machine)->handleTransitionSignal(sender, signalIndex, _a);
+ break;
+ }
+ default: ;
+ }
+ _id -= 1;
+ }
+ return _id;
+}
+
+QSignalEventGenerator::QSignalEventGenerator(QStateMachine *parent)
+ : QObject(parent)
+{
+}
+
+/*!
+ \class QStateMachine::SignalEvent
+
+ \brief The SignalEvent class represents a Qt signal event.
+
+ \since 4.6
+ \ingroup statemachine
+
+ A signal event is generated by a QStateMachine in response to a Qt
+ signal. The QSignalTransition class provides a transition associated with a
+ signal event. QStateMachine::SignalEvent is part of \l{The State Machine Framework}.
+
+ The sender() function returns the object that generated the signal. The
+ signalIndex() function returns the index of the signal. The arguments()
+ function returns the arguments of the signal.
+
+ \sa QSignalTransition
+*/
+
+/*!
+ \internal
+
+ Constructs a new SignalEvent object with the given \a sender, \a
+ signalIndex and \a arguments.
+*/
+QStateMachine::SignalEvent::SignalEvent(QObject *sender, int signalIndex,
+ const QList<QVariant> &arguments)
+ : QEvent(QEvent::StateMachineSignal), m_sender(sender),
+ m_signalIndex(signalIndex), m_arguments(arguments)
+{
+}
+
+/*!
+ Destroys this SignalEvent.
+*/
+QStateMachine::SignalEvent::~SignalEvent()
+{
+}
+
+/*!
+ \fn QStateMachine::SignalEvent::sender() const
+
+ Returns the object that emitted the signal.
+
+ \sa QObject::sender()
+*/
+
+/*!
+ \fn QStateMachine::SignalEvent::signalIndex() const
+
+ Returns the index of the signal.
+
+ \sa QMetaObject::indexOfSignal(), QMetaObject::method()
+*/
+
+/*!
+ \fn QStateMachine::SignalEvent::arguments() const
+
+ Returns the arguments of the signal.
+*/
+
+
+/*!
+ \class QStateMachine::WrappedEvent
+
+ \brief The WrappedEvent class holds a clone of an event associated with a QObject.
+
+ \since 4.6
+ \ingroup statemachine
+
+ A wrapped event is generated by a QStateMachine in response to a Qt
+ event. The QEventTransition class provides a transition associated with a
+ such an event. QStateMachine::WrappedEvent is part of \l{The State Machine
+ Framework}.
+
+ The object() function returns the object that generated the event. The
+ event() function returns a clone of the original event.
+
+ \sa QEventTransition
+*/
+
+/*!
+ \internal
+
+ Constructs a new WrappedEvent object with the given \a object
+ and \a event.
+
+ The WrappedEvent object takes ownership of \a event.
+*/
+QStateMachine::WrappedEvent::WrappedEvent(QObject *object, QEvent *event)
+ : QEvent(QEvent::StateMachineWrapped), m_object(object), m_event(event)
+{
+}
+
+/*!
+ Destroys this WrappedEvent.
+*/
+QStateMachine::WrappedEvent::~WrappedEvent()
+{
+ delete m_event;
+}
+
+/*!
+ \fn QStateMachine::WrappedEvent::object() const
+
+ Returns the object that the event is associated with.
+*/
+
+/*!
+ \fn QStateMachine::WrappedEvent::event() const
+
+ Returns a clone of the original event.
+*/
+
+QT_END_NAMESPACE
+
+#include "moc_qstatemachine.cpp"
+
+#endif //QT_NO_STATEMACHINE