Say hello to QtQuick module

This change moves the QtQuick 2 types and C++ API (including
SceneGraph) to a new module (AKA library), QtQuick.

99% of this change is moving files from src/declarative to
src/quick, and from tests/auto/declarative to
tests/auto/qtquick2.

The loading of QtQuick 2 ("import QtQuick 2.0") is now delegated to
a plugin, src/imports/qtquick2, just like it's done for QtQuick 1.

All tools, examples, and tests that use QtQuick C++ API have gotten
"QT += quick" or "QT += quick-private" added to their .pro file.

A few additional internal QtDeclarative classes had to be exported
(via Q_DECLARATIVE_PRIVATE_EXPORT) since they're needed by the
QtQuick 2 implementation.

The old header locations (e.g. QtDeclarative/qquickitem.h) will
still be supported for some time, but will produce compile-time
warnings. (To avoid the QtQuick implementation using the
compatibility headers (since QtDeclarative's includepath comes
first), a few include statements were modified, e.g. from
"#include <qsgnode.h>" to "#include <QtQuick/qsgnode.h>".)

There's a change in qtbase that automatically adds QtQuick to the
module list if QtDeclarative is used. Together with the compatibility
headers, this should help reduce the migration pain for existing
projects.

In theory, simply getting an existing QtDeclarative-based project
to compile and link shouldn't require any changes for now -- but
porting to the new scheme is of course recommended, and will
eventually become mandatory.

Task-number: QTBUG-22889
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Change-Id: Ia52be9373172ba2f37e7623231ecb060316c96a7
Reviewed-by: Kent Hansen <kent.hansen@nokia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@nokia.com>

1 files changed, 282 insertions, 0 deletions

diff --git a/src/quick/util/qdeclarativetransitionmanager.cpp b/src/quick/util/qdeclarativetransitionmanager.cpp
new file mode 100644
index 0000000000..2dd1da70ed
--- /dev/null
+++ b/src/quick/util/qdeclarativetransitionmanager.cpp
@@ -0,0 +1,282 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** 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 "qdeclarativetransitionmanager_p_p.h"
+
+#include "qdeclarativetransition_p.h"
+#include "qdeclarativestate_p_p.h"
+#include "qdeclarativestate_p.h"
+
+#include <private/qdeclarativebinding_p.h>
+#include <private/qdeclarativeglobal_p.h>
+#include <private/qdeclarativeproperty_p.h>
+
+#include <QtCore/qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+DEFINE_BOOL_CONFIG_OPTION(stateChangeDebug, STATECHANGE_DEBUG);
+
+class QDeclarativeTransitionManagerPrivate
+{
+public:
+    QDeclarativeTransitionManagerPrivate()
+        : state(0) {}
+
+    void applyBindings();
+    typedef QList<QDeclarativeSimpleAction> SimpleActionList;
+    QDeclarativeState *state;
+    QDeclarativeGuard<QDeclarativeTransition> transition;
+    QDeclarativeStateOperation::ActionList bindingsList;
+    SimpleActionList completeList;
+};
+
+QDeclarativeTransitionManager::QDeclarativeTransitionManager()
+: d(new QDeclarativeTransitionManagerPrivate)
+{
+}
+
+void QDeclarativeTransitionManager::setState(QDeclarativeState *s)
+{
+    d->state = s;
+}
+
+QDeclarativeTransitionManager::~QDeclarativeTransitionManager()
+{
+    delete d; d = 0;
+}
+
+void QDeclarativeTransitionManager::complete() 
+{
+    d->applyBindings();
+
+    for (int ii = 0; ii < d->completeList.count(); ++ii) {
+        const QDeclarativeProperty &prop = d->completeList.at(ii).property();
+        prop.write(d->completeList.at(ii).value());
+    }
+
+    d->completeList.clear();
+
+    if (d->state) 
+        static_cast<QDeclarativeStatePrivate*>(QObjectPrivate::get(d->state))->complete();
+}
+
+void QDeclarativeTransitionManagerPrivate::applyBindings()
+{
+    foreach(const QDeclarativeAction &action, bindingsList) {
+        if (!action.toBinding.isNull()) {
+            QDeclarativePropertyPrivate::setBinding(action.property, action.toBinding.data());
+        } else if (action.event) {
+            if (action.reverseEvent)
+                action.event->reverse();
+            else
+                action.event->execute();
+        }
+
+    }
+
+    bindingsList.clear();
+}
+
+void QDeclarativeTransitionManager::transition(const QList<QDeclarativeAction> &list,
+                                      QDeclarativeTransition *transition)
+{
+    cancel();
+
+    QDeclarativeStateOperation::ActionList applyList = list;
+    // Determine which actions are binding changes and disable any current bindings
+    foreach(const QDeclarativeAction &action, applyList) {
+        if (action.toBinding)
+            d->bindingsList << action;
+        if (action.fromBinding)
+            QDeclarativePropertyPrivate::setBinding(action.property, 0); // Disable current binding
+        if (action.event && action.event->changesBindings()) {  //### assume isReversable()?
+            d->bindingsList << action;
+            action.event->clearBindings();
+        }
+    }
+
+    // Animated transitions need both the start and the end value for
+    // each property change.  In the presence of bindings, the end values
+    // are non-trivial to calculate.  As a "best effort" attempt, we first
+    // apply all the property and binding changes, then read all the actual
+    // final values, then roll back the changes and proceed as normal.
+    //
+    // This doesn't catch everything, and it might be a little fragile in
+    // some cases - but whatcha going to do?
+    //
+    // Note that we only fast forward if both a transition and bindings are
+    // present, as it is unneccessary (and potentially expensive) otherwise.
+
+    if (transition && !d->bindingsList.isEmpty()) {
+
+        // Apply all the property and binding changes
+        for (int ii = 0; ii < applyList.size(); ++ii) {
+            const QDeclarativeAction &action = applyList.at(ii);
+            if (!action.toBinding.isNull()) {
+                QDeclarativePropertyPrivate::setBinding(action.property, action.toBinding.data(), QDeclarativePropertyPrivate::BypassInterceptor | QDeclarativePropertyPrivate::DontRemoveBinding);
+            } else if (!action.event) {
+                QDeclarativePropertyPrivate::write(action.property, action.toValue, QDeclarativePropertyPrivate::BypassInterceptor | QDeclarativePropertyPrivate::DontRemoveBinding);
+            } else if (action.event->isReversable()) {
+                if (action.reverseEvent)
+                    action.event->reverse(QDeclarativeActionEvent::FastForward);
+                else
+                    action.event->execute(QDeclarativeActionEvent::FastForward);
+            }
+        }
+
+        // Read all the end values for binding changes
+        for (int ii = 0; ii < applyList.size(); ++ii) {
+            QDeclarativeAction *action = &applyList[ii];
+            if (action->event) {
+                action->event->saveTargetValues();
+                continue;
+            }
+            const QDeclarativeProperty &prop = action->property;
+            if (!action->toBinding.isNull() || !action->toValue.isValid()) {
+                action->toValue = prop.read();
+            }
+        }
+
+        // Revert back to the original values
+        foreach(const QDeclarativeAction &action, applyList) {
+            if (action.event) {
+                if (action.event->isReversable()) {
+                    action.event->clearBindings();
+                    action.event->rewind();
+                    action.event->clearBindings();  //### shouldn't be needed
+                }
+                continue;
+            }
+
+            if (action.toBinding)
+                QDeclarativePropertyPrivate::setBinding(action.property, 0); // Make sure this is disabled during the transition
+
+            QDeclarativePropertyPrivate::write(action.property, action.fromValue, QDeclarativePropertyPrivate::BypassInterceptor | QDeclarativePropertyPrivate::DontRemoveBinding);
+        }
+    }
+
+    if (transition) {
+        QList<QDeclarativeProperty> touched;
+        d->transition = transition;
+        d->transition->prepare(applyList, touched, this);
+
+        // Modify the action list to remove actions handled in the transition
+        for (int ii = 0; ii < applyList.count(); ++ii) {
+            const QDeclarativeAction &action = applyList.at(ii);
+
+            if (action.event) {
+
+                if (action.actionDone) {
+                    applyList.removeAt(ii);
+                    --ii;
+                }
+
+            } else {
+
+                if (touched.contains(action.property)) {
+                    if (action.toValue != action.fromValue) 
+                        d->completeList << 
+                            QDeclarativeSimpleAction(action, QDeclarativeSimpleAction::EndState);
+
+                    applyList.removeAt(ii);
+                    --ii;
+                }
+
+            }
+        }
+    }
+
+    // Any actions remaining have not been handled by the transition and should
+    // be applied immediately.  We skip applying bindings, as they are all
+    // applied at the end in applyBindings() to avoid any nastiness mid 
+    // transition
+    foreach(const QDeclarativeAction &action, applyList) {
+        if (action.event && !action.event->changesBindings()) {
+            if (action.event->isReversable() && action.reverseEvent)
+                action.event->reverse();
+            else
+                action.event->execute();
+        } else if (!action.event && !action.toBinding) {
+            action.property.write(action.toValue);
+        }
+    }
+#ifndef QT_NO_DEBUG_STREAM
+    if (stateChangeDebug()) {
+        foreach(const QDeclarativeAction &action, applyList) {
+            if (action.event)
+                qWarning() << "    No transition for event:" << action.event->typeName();
+            else
+                qWarning() << "    No transition for:" << action.property.object()
+                           << action.property.name() << "From:" << action.fromValue 
+                           << "To:" << action.toValue;
+        }
+    }
+#endif
+    if (!transition)
+        complete();
+}
+
+void QDeclarativeTransitionManager::cancel()
+{
+    if (d->transition) {
+        // ### this could potentially trigger a complete in rare circumstances
+        d->transition->stop();
+        d->transition = 0;
+    }
+
+    for(int i = 0; i < d->bindingsList.count(); ++i) {
+        QDeclarativeAction action = d->bindingsList[i];
+        if (!action.toBinding.isNull() && action.deletableToBinding) {
+            QDeclarativePropertyPrivate::setBinding(action.property, 0);
+            action.toBinding.data()->destroy();
+            action.toBinding.clear();
+            action.deletableToBinding = false;
+        } else if (action.event) {
+            //### what do we do here?
+        }
+
+    }
+    d->bindingsList.clear();
+    d->completeList.clear();
+}
+
+QT_END_NAMESPACE