Implement DnD 3D objects from the item library to the EditView3D

Proof of concept drag and drop implementation. Basic functionality
working but needs polish.

Task-number: QDS-1132
Change-Id: Ie3b9e80de9a414c4955d6e38daf338045bc1e614
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

12 files changed, 170 insertions, 0 deletions

diff --git a/share/qtcreator/qml/qmlpuppet/commands/commands.pri b/share/qtcreator/qml/qmlpuppet/commands/commands.pri
index 78dfcd8eb1..8bca5ce88a 100644
--- a/share/qtcreator/qml/qmlpuppet/commands/commands.pri
+++ b/share/qtcreator/qml/qmlpuppet/commands/commands.pri
@@ -27,6 +27,7 @@ HEADERS += $$PWD/changeauxiliarycommand.h
 HEADERS += $$PWD/removesharedmemorycommand.h
 HEADERS += $$PWD/puppetalivecommand.h
 HEADERS += $$PWD/changeselectioncommand.h
+HEADERS += $$PWD/drop3dlibraryitemcommand.h
 
 SOURCES += $$PWD/synchronizecommand.cpp
 SOURCES += $$PWD/debugoutputcommand.cpp
@@ -55,3 +56,4 @@ SOURCES += $$PWD/changeauxiliarycommand.cpp
 SOURCES += $$PWD/removesharedmemorycommand.cpp
 SOURCES += $$PWD/puppetalivecommand.cpp
 SOURCES += $$PWD/changeselectioncommand.cpp
+SOURCES += $$PWD/drop3dlibraryitemcommand.cpp
diff --git a/share/qtcreator/qml/qmlpuppet/commands/drop3dlibraryitemcommand.cpp b/share/qtcreator/qml/qmlpuppet/commands/drop3dlibraryitemcommand.cpp
new file mode 100644
index 0000000000..aa7c826065
--- /dev/null
+++ b/share/qtcreator/qml/qmlpuppet/commands/drop3dlibraryitemcommand.cpp
@@ -0,0 +1,56 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "drop3dlibraryitemcommand.h"
+
+#include <QDataStream>
+
+namespace QmlDesigner {
+
+Drop3DLibraryItemCommand::Drop3DLibraryItemCommand(const QByteArray &itemData)
+    : m_itemData(itemData)
+{
+}
+
+QDataStream &operator<<(QDataStream &out, const Drop3DLibraryItemCommand &command)
+{
+    out << command.itemData();
+
+    return out;
+}
+
+QDataStream &operator>>(QDataStream &in, Drop3DLibraryItemCommand &command)
+{
+    in >> command.m_itemData;
+
+    return in;
+}
+
+bool operator==(const Drop3DLibraryItemCommand &first, const Drop3DLibraryItemCommand &second)
+{
+    return first.m_itemData == second.m_itemData;
+}
+
+} // namespace QmlDesigner
diff --git a/share/qtcreator/qml/qmlpuppet/commands/drop3dlibraryitemcommand.h b/share/qtcreator/qml/qmlpuppet/commands/drop3dlibraryitemcommand.h
new file mode 100644
index 0000000000..1aa11a85f9
--- /dev/null
+++ b/share/qtcreator/qml/qmlpuppet/commands/drop3dlibraryitemcommand.h
@@ -0,0 +1,59 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <QVector>
+#include <QDataStream>
+#include <QMimeData>
+
+#include "instancecontainer.h"
+
+namespace QmlDesigner {
+
+class Drop3DLibraryItemCommand
+{
+    friend QDataStream &operator>>(QDataStream &in, Drop3DLibraryItemCommand &command);
+    friend QDebug operator<<(QDebug debug, const Drop3DLibraryItemCommand &command);
+    friend bool operator==(const Drop3DLibraryItemCommand &first,
+                           const Drop3DLibraryItemCommand &second);
+
+public:
+    explicit Drop3DLibraryItemCommand(const QByteArray &itemData);
+    Drop3DLibraryItemCommand() = default;
+
+    QByteArray itemData() const { return m_itemData; }
+
+private:
+    QByteArray m_itemData;
+};
+
+QDataStream &operator<<(QDataStream &out, const Drop3DLibraryItemCommand &command);
+QDataStream &operator>>(QDataStream &in, Drop3DLibraryItemCommand &command);
+bool operator==(const Drop3DLibraryItemCommand &first, const Drop3DLibraryItemCommand &second);
+
+} // namespace QmlDesigner
+
+Q_DECLARE_METATYPE(QmlDesigner::Drop3DLibraryItemCommand)
diff --git a/share/qtcreator/qml/qmlpuppet/instances/nodeinstanceclientproxy.cpp b/share/qtcreator/qml/qmlpuppet/instances/nodeinstanceclientproxy.cpp
index 3e57baffd0..7d46fcbfc1 100644
--- a/share/qtcreator/qml/qmlpuppet/instances/nodeinstanceclientproxy.cpp
+++ b/share/qtcreator/qml/qmlpuppet/instances/nodeinstanceclientproxy.cpp
@@ -68,6 +68,7 @@
 #include "debugoutputcommand.h"
 #include "puppetalivecommand.h"
 #include "changeselectioncommand.h"
+#include "drop3dlibraryitemcommand.h"
 
 namespace QmlDesigner {
 
@@ -139,6 +140,7 @@ bool compareCommands(const QVariant &command, const QVariant &controlCommand)
     static const int tokenCommandType = QMetaType::type("TokenCommand");
     static const int debugOutputCommandType = QMetaType::type("DebugOutputCommand");
     static const int changeSelectionCommandType = QMetaType::type("ChangeSelectionCommand");
+    static const int drop3DLibraryItemCommandType = QMetaType::type("Drop3DLibraryItemCommand");
 
     if (command.userType() == controlCommand.userType()) {
         if (command.userType() == informationChangedCommandType)
@@ -163,6 +165,8 @@ bool compareCommands(const QVariant &command, const QVariant &controlCommand)
             return command.value<DebugOutputCommand>() == controlCommand.value<DebugOutputCommand>();
         else if (command.userType() == changeSelectionCommandType)
             return command.value<ChangeSelectionCommand>() == controlCommand.value<ChangeSelectionCommand>();
+        else if (command.userType() == drop3DLibraryItemCommandType)
+            return command.value<Drop3DLibraryItemCommand>() == controlCommand.value<Drop3DLibraryItemCommand>();
     }
 
     return false;
@@ -250,6 +254,11 @@ void NodeInstanceClientProxy::selectionChanged(const ChangeSelectionCommand &com
      writeCommand(QVariant::fromValue(command));
 }
 
+void NodeInstanceClientProxy::library3DItemDropped(const Drop3DLibraryItemCommand &command)
+{
+    writeCommand(QVariant::fromValue(command));
+}
+
 void NodeInstanceClientProxy::flush()
 {
 }
diff --git a/share/qtcreator/qml/qmlpuppet/instances/nodeinstanceclientproxy.h b/share/qtcreator/qml/qmlpuppet/instances/nodeinstanceclientproxy.h
index edf290f38a..2b41bf83cb 100644
--- a/share/qtcreator/qml/qmlpuppet/instances/nodeinstanceclientproxy.h
+++ b/share/qtcreator/qml/qmlpuppet/instances/nodeinstanceclientproxy.h
@@ -57,6 +57,7 @@ class ChangeStateCommand;
 class ChangeNodeSourceCommand;
 class EndPuppetCommand;
 class ChangeSelectionCommand;
+class Drop3DLibraryItemCommand;
 
 class NodeInstanceClientProxy : public QObject, public NodeInstanceClientInterface
 {
@@ -76,6 +77,7 @@ public:
     void debugOutput(const DebugOutputCommand &command) override;
     void puppetAlive(const PuppetAliveCommand &command);
     void selectionChanged(const ChangeSelectionCommand &command) override;
+    void library3DItemDropped(const Drop3DLibraryItemCommand &command) override;
 
     void flush() override;
     void synchronizeWithClientProcess() override;
diff --git a/share/qtcreator/qml/qmlpuppet/interfaces/nodeinstanceclientinterface.h b/share/qtcreator/qml/qmlpuppet/interfaces/nodeinstanceclientinterface.h
index 0b5a5ca334..10688cdd89 100644
--- a/share/qtcreator/qml/qmlpuppet/interfaces/nodeinstanceclientinterface.h
+++ b/share/qtcreator/qml/qmlpuppet/interfaces/nodeinstanceclientinterface.h
@@ -41,6 +41,7 @@ class RemoveSharedMemoryCommand;
 class DebugOutputCommand;
 class PuppetAliveCommand;
 class ChangeSelectionCommand;
+class Drop3DLibraryItemCommand;
 
 class NodeInstanceClientInterface
 {
@@ -55,6 +56,7 @@ public:
     virtual void token(const TokenCommand &command) = 0;
     virtual void debugOutput(const DebugOutputCommand &command) = 0;
     virtual void selectionChanged(const ChangeSelectionCommand &command) = 0;
+    virtual void library3DItemDropped(const Drop3DLibraryItemCommand &command) = 0;
 
     virtual void flush() {}
     virtual void synchronizeWithClientProcess() {}
diff --git a/share/qtcreator/qml/qmlpuppet/interfaces/nodeinstanceserverinterface.cpp b/share/qtcreator/qml/qmlpuppet/interfaces/nodeinstanceserverinterface.cpp
index d2b7cb2620..e58ef1011e 100644
--- a/share/qtcreator/qml/qmlpuppet/interfaces/nodeinstanceserverinterface.cpp
+++ b/share/qtcreator/qml/qmlpuppet/interfaces/nodeinstanceserverinterface.cpp
@@ -46,6 +46,7 @@
 #include "addimportcontainer.h"
 #include "changenodesourcecommand.h"
 #include "changeselectioncommand.h"
+#include "drop3dlibraryitemcommand.h"
 
 #include "informationchangedcommand.h"
 #include "pixmapchangedcommand.h"
@@ -107,6 +108,9 @@ void NodeInstanceServerInterface::registerCommands()
     qRegisterMetaType<ChangeSelectionCommand>("ChangeSelectionCommand");
     qRegisterMetaTypeStreamOperators<ChangeSelectionCommand>("ChangeSelectionCommand");
 
+    qRegisterMetaType<Drop3DLibraryItemCommand>("Drop3DLibraryItemCommand");
+    qRegisterMetaTypeStreamOperators<Drop3DLibraryItemCommand>("Drop3DLibraryItemCommand");
+
     qRegisterMetaType<RemovePropertiesCommand>("RemovePropertiesCommand");
     qRegisterMetaTypeStreamOperators<RemovePropertiesCommand>("RemovePropertiesCommand");
 
diff --git a/share/qtcreator/qml/qmlpuppet/mockfiles/EditView3D.qml b/share/qtcreator/qml/qmlpuppet/mockfiles/EditView3D.qml
index e82391f8bc..024c8c5d1b 100644
--- a/share/qtcreator/qml/qmlpuppet/mockfiles/EditView3D.qml
+++ b/share/qtcreator/qml/qmlpuppet/mockfiles/EditView3D.qml
@@ -161,6 +161,10 @@ Window {
             }
         }
 
+        DropArea {
+            anchors.fill: parent
+        }
+
         View3D {
             id: editView
             anchors.fill: parent
diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp
index 9103ef5de0..e2e6564c89 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp
@@ -67,6 +67,7 @@
 #include <tokencommand.h>
 #include <removesharedmemorycommand.h>
 #include <changeselectioncommand.h>
+#include <drop3dlibraryitemcommand.h>
 
 #include <QDebug>
 #include <QQmlEngine>
@@ -1171,6 +1172,11 @@ ChangeSelectionCommand NodeInstanceServer::createChangeSelectionCommand(const QL
     return ChangeSelectionCommand(idVector);
 }
 
+Drop3DLibraryItemCommand NodeInstanceServer::createDrop3DLibraryItemCommand(const QByteArray &itemData)
+{
+    return Drop3DLibraryItemCommand(itemData);
+}
+
 ValuesChangedCommand NodeInstanceServer::createValuesChangedCommand(const QVector<InstancePropertyPair> &propertyList) const
 {
     QVector<PropertyValueContainer> valueVector;
diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h
index 7af63c0b5b..9eab649af7 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h
@@ -70,6 +70,7 @@ class AddImportContainer;
 class MockupTypeContainer;
 class IdContainer;
 class ChangeSelectionCommand;
+class Drop3DLibraryItemCommand;
 
 namespace Internal {
     class ChildrenChangeEventFilter;
@@ -180,6 +181,7 @@ protected:
     ChildrenChangedCommand createChildrenChangedCommand(const ServerNodeInstance &parentInstance, const QList<ServerNodeInstance> &instanceList) const;
     ComponentCompletedCommand createComponentCompletedCommand(const QList<ServerNodeInstance> &instanceList);
     ChangeSelectionCommand createChangeSelectionCommand(const QList<ServerNodeInstance> &instanceList);
+    Drop3DLibraryItemCommand createDrop3DLibraryItemCommand(const QByteArray &itemData);
 
     void addChangedProperty(const InstancePropertyPair &property);
 
diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5informationnodeinstanceserver.cpp b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5informationnodeinstanceserver.cpp
index a0783eff57..546593ca82 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5informationnodeinstanceserver.cpp
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5informationnodeinstanceserver.cpp
@@ -27,6 +27,8 @@
 
 #include <QQuickItem>
 #include <QQuickView>
+#include <QDropEvent>
+#include <QMimeData>
 
 #include "servernodeinstance.h"
 #include "childrenchangeeventfilter.h"
@@ -57,6 +59,7 @@
 #include "removesharedmemorycommand.h"
 #include "changeselectioncommand.h"
 #include "objectnodeinstance.h"
+#include <drop3dlibraryitemcommand.h>
 
 #include "dummycontextobject.h"
 #include "../editor3d/cameracontrolhelper.h"
@@ -79,6 +82,25 @@ static QVariant objectToVariant(QObject *object)
     return QVariant::fromValue(object);
 }
 
+bool Qt5InformationNodeInstanceServer::eventFilter(QObject *, QEvent *event)
+{
+    switch (event->type()) {
+    case QEvent::Drop: {
+        QDropEvent *dropEvent = static_cast<QDropEvent *>(event);
+        QByteArray data = dropEvent->mimeData()->data(
+                                        QStringLiteral("application/vnd.bauhaus.itemlibraryinfo"));
+        if (!data.isEmpty())
+            nodeInstanceClient()->library3DItemDropped(createDrop3DLibraryItemCommand(data));
+
+    } break;
+
+    default:
+        break;
+    }
+
+    return false;
+}
+
 QObject *Qt5InformationNodeInstanceServer::createEditView3D(QQmlEngine *engine)
 {
     auto helper = new QmlDesigner::Internal::CameraControlHelper();
@@ -98,6 +120,7 @@ QObject *Qt5InformationNodeInstanceServer::createEditView3D(QQmlEngine *engine)
         return nullptr;
     }
 
+    window->installEventFilter(this);
     QObject::connect(window, SIGNAL(objectClicked(QVariant)), this, SLOT(objectClicked(QVariant)));
     QObject::connect(window, SIGNAL(commitObjectProperty(QVariant, QVariant)),
                      this, SLOT(handleObjectPropertyCommit(QVariant, QVariant)));
diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5informationnodeinstanceserver.h b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5informationnodeinstanceserver.h
index dc1e342fbd..0597947024 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5informationnodeinstanceserver.h
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5informationnodeinstanceserver.h
@@ -57,6 +57,7 @@ private slots:
 
 protected:
     void collectItemChangesAndSendChangeCommands() override;
+    bool eventFilter(QObject *obj, QEvent *event) override;
     void sendChildrenChangedCommand(const QList<ServerNodeInstance> &childList);
     void sendTokenBack();
     bool isDirtyRecursiveForNonInstanceItems(QQuickItem *item) const;