Add API to map animation channels to properties

Change-Id: I98aecf101eb052979f7a2e98c8bfcf899f27fb02
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

1 files changed, 99 insertions, 0 deletions

diff --git a/src/animation/backend/channelmapper.cpp b/src/animation/backend/channelmapper.cpp
new file mode 100644
index 000000000..0e5555096
--- /dev/null
+++ b/src/animation/backend/channelmapper.cpp
@@ -0,0 +1,99 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later 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 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "channelmapper_p.h"
+#include <Qt3DAnimation/qchannelmapper.h>
+#include <Qt3DAnimation/private/qchannelmapper_p.h>
+#include <Qt3DAnimation/private/animationlogging_p.h>
+#include <Qt3DCore/qpropertyupdatedchange.h>
+#include <Qt3DCore/qpropertynodeaddedchange.h>
+#include <Qt3DCore/qpropertynoderemovedchange.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DAnimation {
+namespace Animation {
+
+ChannelMapper::ChannelMapper()
+    : BackendNode(ReadOnly)
+    , m_mappingIds()
+{
+}
+
+void ChannelMapper::initializeFromPeer(const Qt3DCore::QNodeCreatedChangeBasePtr &change)
+{
+    const auto typedChange = qSharedPointerCast<Qt3DCore::QNodeCreatedChange<QChannelMapperData>>(change);
+    const auto &data = typedChange->data;
+    m_mappingIds = data.mappingIds;
+}
+
+void ChannelMapper::cleanup()
+{
+    setEnabled(false);
+    m_mappingIds.clear();
+}
+
+void ChannelMapper::sceneChangeEvent(const Qt3DCore::QSceneChangePtr &e)
+{
+    switch (e->type()) {
+    case Qt3DCore::PropertyValueAdded: {
+        const auto change = qSharedPointerCast<Qt3DCore::QPropertyNodeAddedChange>(e);
+        if (change->propertyName() == QByteArrayLiteral("mappings")) {
+            m_mappingIds.push_back(change->addedNodeId());
+            setDirty(Handler::ChannelMappingsDirty);
+        }
+        break;
+    }
+
+    case Qt3DCore::PropertyValueRemoved: {
+        const auto change = qSharedPointerCast<Qt3DCore::QPropertyNodeRemovedChange>(e);
+        if (change->propertyName() == QByteArrayLiteral("mappings")) {
+            m_mappingIds.removeOne(change->removedNodeId());
+            setDirty(Handler::ChannelMappingsDirty);
+        }
+        break;
+    }
+
+    default:
+        break;
+    }
+    QBackendNode::sceneChangeEvent(e);
+}
+
+} // namespace Animation
+} // namespace Qt3DAnimation
+
+QT_END_NAMESPACE