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Diffstat (limited to 'src/quick/util/qdeclarativestate.cpp')
| -rw-r--r-- | src/quick/util/qdeclarativestate.cpp | 729 |
1 files changed, 0 insertions, 729 deletions
diff --git a/src/quick/util/qdeclarativestate.cpp b/src/quick/util/qdeclarativestate.cpp deleted file mode 100644 index f0795e92bc..0000000000 --- a/src/quick/util/qdeclarativestate.cpp +++ /dev/null @@ -1,729 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). -** Contact: http://www.qt-project.org/ -** -** This file is part of the QtDeclarative module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** 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. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU General -** Public License version 3.0 as published by the Free Software Foundation -** and appearing in the file LICENSE.GPL included in the packaging of this -** file. Please review the following information to ensure the GNU General -** Public License version 3.0 requirements will be met: -** http://www.gnu.org/copyleft/gpl.html. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qdeclarativestate_p_p.h" -#include "qdeclarativestate_p.h" - -#include "qdeclarativestategroup_p.h" -#include "qdeclarativestateoperations_p.h" - -#include <private/qdeclarativeglobal_p.h> - -#include <QtCore/qdebug.h> - -QT_BEGIN_NAMESPACE - -DEFINE_BOOL_CONFIG_OPTION(stateChangeDebug, STATECHANGE_DEBUG); - -QDeclarativeAction::QDeclarativeAction() -: restore(true), actionDone(false), reverseEvent(false), deletableToBinding(false), fromBinding(0), event(0), - specifiedObject(0) -{ -} - -QDeclarativeAction::QDeclarativeAction(QObject *target, const QString &propertyName, - const QVariant &value) -: restore(true), actionDone(false), reverseEvent(false), deletableToBinding(false), - property(target, propertyName, qmlEngine(target)), toValue(value), - fromBinding(0), event(0), - specifiedObject(target), specifiedProperty(propertyName) -{ - if (property.isValid()) - fromValue = property.read(); -} - -QDeclarativeAction::QDeclarativeAction(QObject *target, const QString &propertyName, - QDeclarativeContext *context, const QVariant &value) -: restore(true), actionDone(false), reverseEvent(false), deletableToBinding(false), - property(target, propertyName, context), toValue(value), - fromBinding(0), event(0), - specifiedObject(target), specifiedProperty(propertyName) -{ - if (property.isValid()) - fromValue = property.read(); -} - - -QDeclarativeActionEvent::~QDeclarativeActionEvent() -{ -} - -void QDeclarativeActionEvent::execute(Reason) -{ -} - -bool QDeclarativeActionEvent::isReversable() -{ - return false; -} - -void QDeclarativeActionEvent::reverse(Reason) -{ -} - -bool QDeclarativeActionEvent::changesBindings() -{ - return false; -} - -void QDeclarativeActionEvent::clearBindings() -{ -} - -bool QDeclarativeActionEvent::override(QDeclarativeActionEvent *other) -{ - Q_UNUSED(other); - return false; -} - -QDeclarativeStateOperation::QDeclarativeStateOperation(QObjectPrivate &dd, QObject *parent) - : QObject(dd, parent) -{ -} - -/*! - \qmlclass State QDeclarativeState - \inqmlmodule QtQuick 2 - \ingroup qml-state-elements - \brief The State element defines configurations of objects and properties. - - A \e state is a set of batched changes from the default configuration. - - All items have a default state that defines the default configuration of objects - and property values. New states can be defined by adding State items to the \l {Item::states}{states} property to - allow items to switch between different configurations. These configurations - can, for example, be used to apply different sets of property values or execute - different scripts. - - The following example displays a single \l Rectangle. In the default state, the rectangle - is colored black. In the "clicked" state, a PropertyChanges element changes the - rectangle's color to red. Clicking within the MouseArea toggles the rectangle's state - between the default state and the "clicked" state, thus toggling the color of the - rectangle between black and red. - - \snippet doc/src/snippets/declarative/state.qml 0 - - Notice the default state is referred to using an empty string (""). - - States are commonly used together with \l{QML Animation and Transitions}{Transitions} to provide - animations when state changes occur. - - \note Setting the state of an object from within another state of the same object is - not allowed. - - \sa {declarative/animation/states}{states example}, {qmlstates}{States}, - {QML Animation and Transitions}{Transitions}, QtDeclarative -*/ -QDeclarativeState::QDeclarativeState(QObject *parent) -: QObject(*(new QDeclarativeStatePrivate), parent) -{ - Q_D(QDeclarativeState); - d->transitionManager.setState(this); -} - -QDeclarativeState::~QDeclarativeState() -{ - Q_D(QDeclarativeState); - if (d->group) - d->group->removeState(this); -} - -/*! - \qmlproperty string QtQuick2::State::name - This property holds the name of the state. - - Each state should have a unique name within its item. -*/ -QString QDeclarativeState::name() const -{ - Q_D(const QDeclarativeState); - return d->name; -} - -void QDeclarativeState::setName(const QString &n) -{ - Q_D(QDeclarativeState); - d->name = n; - d->named = true; -} - -bool QDeclarativeState::isNamed() const -{ - Q_D(const QDeclarativeState); - return d->named; -} - -bool QDeclarativeState::isWhenKnown() const -{ - Q_D(const QDeclarativeState); - return d->when != 0; -} - -/*! - \qmlproperty bool QtQuick2::State::when - This property holds when the state should be applied. - - This should be set to an expression that evaluates to \c true when you want the state to - be applied. For example, the following \l Rectangle changes in and out of the "hidden" - state when the \l MouseArea is pressed: - - \snippet doc/src/snippets/declarative/state-when.qml 0 - - If multiple states in a group have \c when clauses that evaluate to \c true - at the same time, the first matching state will be applied. For example, in - the following snippet \c state1 will always be selected rather than - \c state2 when sharedCondition becomes \c true. - \qml - Item { - states: [ - State { name: "state1"; when: sharedCondition }, - State { name: "state2"; when: sharedCondition } - ] - // ... - } - \endqml -*/ -QDeclarativeBinding *QDeclarativeState::when() const -{ - Q_D(const QDeclarativeState); - return d->when; -} - -void QDeclarativeState::setWhen(QDeclarativeBinding *when) -{ - Q_D(QDeclarativeState); - d->when = when; - if (d->group) - d->group->updateAutoState(); -} - -/*! - \qmlproperty string QtQuick2::State::extend - This property holds the state that this state extends. - - When a state extends another state, it inherits all the changes of that state. - - The state being extended is treated as the base state in regards to - the changes specified by the extending state. -*/ -QString QDeclarativeState::extends() const -{ - Q_D(const QDeclarativeState); - return d->extends; -} - -void QDeclarativeState::setExtends(const QString &extends) -{ - Q_D(QDeclarativeState); - d->extends = extends; -} - -/*! - \qmlproperty list<Change> QtQuick2::State::changes - This property holds the changes to apply for this state - \default - - By default these changes are applied against the default state. If the state - extends another state, then the changes are applied against the state being - extended. -*/ -QDeclarativeListProperty<QDeclarativeStateOperation> QDeclarativeState::changes() -{ - Q_D(QDeclarativeState); - return QDeclarativeListProperty<QDeclarativeStateOperation>(this, &d->operations, QDeclarativeStatePrivate::operations_append, - QDeclarativeStatePrivate::operations_count, QDeclarativeStatePrivate::operations_at, - QDeclarativeStatePrivate::operations_clear); -} - -int QDeclarativeState::operationCount() const -{ - Q_D(const QDeclarativeState); - return d->operations.count(); -} - -QDeclarativeStateOperation *QDeclarativeState::operationAt(int index) const -{ - Q_D(const QDeclarativeState); - return d->operations.at(index); -} - -QDeclarativeState &QDeclarativeState::operator<<(QDeclarativeStateOperation *op) -{ - Q_D(QDeclarativeState); - d->operations.append(QDeclarativeStatePrivate::OperationGuard(op, &d->operations)); - return *this; -} - -void QDeclarativeStatePrivate::complete() -{ - Q_Q(QDeclarativeState); - - for (int ii = 0; ii < reverting.count(); ++ii) { - for (int jj = 0; jj < revertList.count(); ++jj) { - const QDeclarativeRevertAction &revert = reverting.at(ii); - const QDeclarativeSimpleAction &simple = revertList.at(jj); - if ((revert.event && simple.event() == revert.event) || - simple.property() == revert.property) { - revertList.removeAt(jj); - break; - } - } - } - reverting.clear(); - - if (group) - group->stateAboutToComplete(); - emit q->completed(); -} - -// Generate a list of actions for this state. This includes coelescing state -// actions that this state "extends" -QDeclarativeStateOperation::ActionList -QDeclarativeStatePrivate::generateActionList() const -{ - QDeclarativeStateOperation::ActionList applyList; - if (inState) - return applyList; - - // Prevent "extends" recursion - inState = true; - - if (!extends.isEmpty()) { - QList<QDeclarativeState *> states = group ? group->states() : QList<QDeclarativeState *>(); - for (int ii = 0; ii < states.count(); ++ii) - if (states.at(ii)->name() == extends) { - qmlExecuteDeferred(states.at(ii)); - applyList = static_cast<QDeclarativeStatePrivate*>(states.at(ii)->d_func())->generateActionList(); - } - } - - foreach(QDeclarativeStateOperation *op, operations) - applyList << op->actions(); - - inState = false; - return applyList; -} - -QDeclarativeStateGroup *QDeclarativeState::stateGroup() const -{ - Q_D(const QDeclarativeState); - return d->group; -} - -void QDeclarativeState::setStateGroup(QDeclarativeStateGroup *group) -{ - Q_D(QDeclarativeState); - d->group = group; -} - -void QDeclarativeState::cancel() -{ - Q_D(QDeclarativeState); - d->transitionManager.cancel(); -} - -void QDeclarativeAction::deleteFromBinding() -{ - if (fromBinding) { - QDeclarativePropertyPrivate::setBinding(property, 0); - fromBinding->destroy(); - fromBinding = 0; - } -} - -bool QDeclarativeState::containsPropertyInRevertList(QObject *target, const QString &name) const -{ - Q_D(const QDeclarativeState); - - if (isStateActive()) { - QListIterator<QDeclarativeSimpleAction> revertListIterator(d->revertList); - - while (revertListIterator.hasNext()) { - const QDeclarativeSimpleAction &simpleAction = revertListIterator.next(); - if (simpleAction.specifiedObject() == target && simpleAction.specifiedProperty() == name) - return true; - } - } - - return false; -} - -bool QDeclarativeState::changeValueInRevertList(QObject *target, const QString &name, const QVariant &revertValue) -{ - Q_D(QDeclarativeState); - - if (isStateActive()) { - QMutableListIterator<QDeclarativeSimpleAction> revertListIterator(d->revertList); - - while (revertListIterator.hasNext()) { - QDeclarativeSimpleAction &simpleAction = revertListIterator.next(); - if (simpleAction.specifiedObject() == target && simpleAction.specifiedProperty() == name) { - simpleAction.setValue(revertValue); - return true; - } - } - } - - return false; -} - -bool QDeclarativeState::changeBindingInRevertList(QObject *target, const QString &name, QDeclarativeAbstractBinding *binding) -{ - Q_D(QDeclarativeState); - - if (isStateActive()) { - QMutableListIterator<QDeclarativeSimpleAction> revertListIterator(d->revertList); - - while (revertListIterator.hasNext()) { - QDeclarativeSimpleAction &simpleAction = revertListIterator.next(); - if (simpleAction.specifiedObject() == target && simpleAction.specifiedProperty() == name) { - if (simpleAction.binding()) - simpleAction.binding()->destroy(); - - simpleAction.setBinding(binding); - return true; - } - } - } - - return false; -} - -bool QDeclarativeState::removeEntryFromRevertList(QObject *target, const QString &name) -{ - Q_D(QDeclarativeState); - - if (isStateActive()) { - QMutableListIterator<QDeclarativeSimpleAction> revertListIterator(d->revertList); - - while (revertListIterator.hasNext()) { - QDeclarativeSimpleAction &simpleAction = revertListIterator.next(); - if (simpleAction.property().object() == target && simpleAction.property().name() == name) { - QDeclarativeAbstractBinding *oldBinding = QDeclarativePropertyPrivate::binding(simpleAction.property()); - if (oldBinding) { - QDeclarativePropertyPrivate::setBinding(simpleAction.property(), 0); - oldBinding->destroy(); - } - - simpleAction.property().write(simpleAction.value()); - if (simpleAction.binding()) - QDeclarativePropertyPrivate::setBinding(simpleAction.property(), simpleAction.binding()); - - revertListIterator.remove(); - return true; - } - } - } - - return false; -} - -void QDeclarativeState::addEntryToRevertList(const QDeclarativeAction &action) -{ - Q_D(QDeclarativeState); - - QDeclarativeSimpleAction simpleAction(action); - - d->revertList.append(simpleAction); -} - -void QDeclarativeState::removeAllEntriesFromRevertList(QObject *target) -{ - Q_D(QDeclarativeState); - - if (isStateActive()) { - QMutableListIterator<QDeclarativeSimpleAction> revertListIterator(d->revertList); - - while (revertListIterator.hasNext()) { - QDeclarativeSimpleAction &simpleAction = revertListIterator.next(); - if (simpleAction.property().object() == target) { - QDeclarativeAbstractBinding *oldBinding = QDeclarativePropertyPrivate::binding(simpleAction.property()); - if (oldBinding) { - QDeclarativePropertyPrivate::setBinding(simpleAction.property(), 0); - oldBinding->destroy(); - } - - simpleAction.property().write(simpleAction.value()); - if (simpleAction.binding()) - QDeclarativePropertyPrivate::setBinding(simpleAction.property(), simpleAction.binding()); - - revertListIterator.remove(); - } - } - } -} - -void QDeclarativeState::addEntriesToRevertList(const QList<QDeclarativeAction> &actionList) -{ - Q_D(QDeclarativeState); - if (isStateActive()) { - QList<QDeclarativeSimpleAction> simpleActionList; - - QListIterator<QDeclarativeAction> actionListIterator(actionList); - while(actionListIterator.hasNext()) { - const QDeclarativeAction &action = actionListIterator.next(); - QDeclarativeSimpleAction simpleAction(action); - action.property.write(action.toValue); - if (!action.toBinding.isNull()) { - QDeclarativeAbstractBinding *oldBinding = QDeclarativePropertyPrivate::binding(simpleAction.property()); - if (oldBinding) - QDeclarativePropertyPrivate::setBinding(simpleAction.property(), 0); - QDeclarativePropertyPrivate::setBinding(simpleAction.property(), action.toBinding.data(), QDeclarativePropertyPrivate::DontRemoveBinding); - } - - simpleActionList.append(simpleAction); - } - - d->revertList.append(simpleActionList); - } -} - -QVariant QDeclarativeState::valueInRevertList(QObject *target, const QString &name) const -{ - Q_D(const QDeclarativeState); - - if (isStateActive()) { - QListIterator<QDeclarativeSimpleAction> revertListIterator(d->revertList); - - while (revertListIterator.hasNext()) { - const QDeclarativeSimpleAction &simpleAction = revertListIterator.next(); - if (simpleAction.specifiedObject() == target && simpleAction.specifiedProperty() == name) - return simpleAction.value(); - } - } - - return QVariant(); -} - -QDeclarativeAbstractBinding *QDeclarativeState::bindingInRevertList(QObject *target, const QString &name) const -{ - Q_D(const QDeclarativeState); - - if (isStateActive()) { - QListIterator<QDeclarativeSimpleAction> revertListIterator(d->revertList); - - while (revertListIterator.hasNext()) { - const QDeclarativeSimpleAction &simpleAction = revertListIterator.next(); - if (simpleAction.specifiedObject() == target && simpleAction.specifiedProperty() == name) - return simpleAction.binding(); - } - } - - return 0; -} - -bool QDeclarativeState::isStateActive() const -{ - return stateGroup() && stateGroup()->state() == name(); -} - -void QDeclarativeState::apply(QDeclarativeTransition *trans, QDeclarativeState *revert) -{ - Q_D(QDeclarativeState); - - qmlExecuteDeferred(this); - - cancel(); - if (revert) - revert->cancel(); - d->revertList.clear(); - d->reverting.clear(); - - if (revert) { - QDeclarativeStatePrivate *revertPrivate = - static_cast<QDeclarativeStatePrivate*>(revert->d_func()); - d->revertList = revertPrivate->revertList; - revertPrivate->revertList.clear(); - } - - // List of actions caused by this state - QDeclarativeStateOperation::ActionList applyList = d->generateActionList(); - - // List of actions that need to be reverted to roll back (just) this state - QDeclarativeStatePrivate::SimpleActionList additionalReverts; - // First add the reverse of all the applyList actions - for (int ii = 0; ii < applyList.count(); ++ii) { - QDeclarativeAction &action = applyList[ii]; - - if (action.event) { - if (!action.event->isReversable()) - continue; - bool found = false; - for (int jj = 0; jj < d->revertList.count(); ++jj) { - QDeclarativeActionEvent *event = d->revertList.at(jj).event(); - if (event && event->type() == action.event->type()) { - if (action.event->override(event)) { - found = true; - - if (action.event != d->revertList.at(jj).event() && action.event->needsCopy()) { - action.event->copyOriginals(d->revertList.at(jj).event()); - - QDeclarativeSimpleAction r(action); - additionalReverts << r; - d->revertList.removeAt(jj); - --jj; - } else if (action.event->isRewindable()) //###why needed? - action.event->saveCurrentValues(); - - break; - } - } - } - if (!found) { - action.event->saveOriginals(); - // Only need to revert the applyList action if the previous - // state doesn't have a higher priority revert already - QDeclarativeSimpleAction r(action); - additionalReverts << r; - } - } else { - bool found = false; - action.fromBinding = QDeclarativePropertyPrivate::binding(action.property); - - for (int jj = 0; jj < d->revertList.count(); ++jj) { - if (d->revertList.at(jj).property() == action.property) { - found = true; - if (d->revertList.at(jj).binding() != action.fromBinding) { - action.deleteFromBinding(); - } - break; - } - } - - if (!found) { - if (!action.restore) { - action.deleteFromBinding();; - } else { - // Only need to revert the applyList action if the previous - // state doesn't have a higher priority revert already - QDeclarativeSimpleAction r(action); - additionalReverts << r; - } - } - } - } - - // Any reverts from a previous state that aren't carried forth - // into this state need to be translated into apply actions - for (int ii = 0; ii < d->revertList.count(); ++ii) { - bool found = false; - if (d->revertList.at(ii).event()) { - QDeclarativeActionEvent *event = d->revertList.at(ii).event(); - if (!event->isReversable()) - continue; - for (int jj = 0; !found && jj < applyList.count(); ++jj) { - const QDeclarativeAction &action = applyList.at(jj); - if (action.event && action.event->type() == event->type()) { - if (action.event->override(event)) - found = true; - } - } - } else { - for (int jj = 0; !found && jj < applyList.count(); ++jj) { - const QDeclarativeAction &action = applyList.at(jj); - if (action.property == d->revertList.at(ii).property()) - found = true; - } - } - if (!found) { - QVariant cur = d->revertList.at(ii).property().read(); - QDeclarativeAbstractBinding *delBinding = - QDeclarativePropertyPrivate::setBinding(d->revertList.at(ii).property(), 0); - if (delBinding) - delBinding->destroy(); - - QDeclarativeAction a; - a.property = d->revertList.at(ii).property(); - a.fromValue = cur; - a.toValue = d->revertList.at(ii).value(); - a.toBinding = QDeclarativeAbstractBinding::getPointer(d->revertList.at(ii).binding()); - a.specifiedObject = d->revertList.at(ii).specifiedObject(); - a.specifiedProperty = d->revertList.at(ii).specifiedProperty(); - a.event = d->revertList.at(ii).event(); - a.reverseEvent = d->revertList.at(ii).reverseEvent(); - if (a.event && a.event->isRewindable()) - a.event->saveCurrentValues(); - applyList << a; - // Store these special reverts in the reverting list - if (a.event) - d->reverting << a.event; - else - d->reverting << a.property; - } - } - // All the local reverts now become part of the ongoing revertList - d->revertList << additionalReverts; - -#ifndef QT_NO_DEBUG_STREAM - // Output for debugging - if (stateChangeDebug()) { - foreach(const QDeclarativeAction &action, applyList) { - if (action.event) - qWarning() << " QDeclarativeAction event:" << action.event->type(); - else - qWarning() << " QDeclarativeAction:" << action.property.object() - << action.property.name() << "From:" << action.fromValue - << "To:" << action.toValue; - } - } -#endif - - d->transitionManager.transition(applyList, trans); -} - -QDeclarativeStateOperation::ActionList QDeclarativeStateOperation::actions() -{ - return ActionList(); -} - -QDeclarativeState *QDeclarativeStateOperation::state() const -{ - Q_D(const QDeclarativeStateOperation); - return d->m_state; -} - -void QDeclarativeStateOperation::setState(QDeclarativeState *state) -{ - Q_D(QDeclarativeStateOperation); - d->m_state = state; -} - -QT_END_NAMESPACE |