(#372) First step in Reimplemented drag and drop support

Fwk/AppFwk/cafUserInterface/CMakeLists.txt

@@ -62,6 +62,7 @@ set( PROJECT_FILES
     cafPdmUiComboBoxEditor.h
     cafPdmUiDoubleSliderEditor.cpp
     cafPdmUiDoubleSliderEditor.h
+    cafPdmUiDragDropHandle.h
     cafPdmUiFilePathEditor.cpp
     cafPdmUiFilePathEditor.h
     cafPdmUiLineEditor.cpp

Fwk/AppFwk/cafUserInterface/cafPdmUiDragDropHandle.h

@@ -0,0 +1,64 @@
+//##################################################################################################
+//
+//   Custom Visualization Core library
+//   Copyright (C) 2015- Ceetron Solutions AS
+//
+//   This library may be used under the terms of either the GNU General Public License or
+//   the GNU Lesser General Public License as follows:
+//
+//   GNU General Public License Usage
+//   This library is free software: you can redistribute it and/or modify
+//   it under the terms of the GNU General Public License as published by
+//   the Free Software Foundation, either version 3 of the License, or
+//   (at your option) any later version.
+//
+//   This library is distributed in the hope that it will be useful, but WITHOUT ANY
+//   WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//   FITNESS FOR A PARTICULAR PURPOSE.
+//
+//   See the GNU General Public License at <<http://www.gnu.org/licenses/gpl.html>>
+//   for more details.
+//
+//   GNU Lesser General Public License Usage
+//   This library is free software; you can redistribute it and/or modify
+//   it under the terms of the GNU Lesser General Public License as published by
+//   the Free Software Foundation; either version 2.1 of the License, or
+//   (at your option) any later version.
+//
+//   This library is distributed in the hope that it will be useful, but WITHOUT ANY
+//   WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//   FITNESS FOR A PARTICULAR PURPOSE.
+//
+//   See the GNU Lesser General Public License at <<http://www.gnu.org/licenses/lgpl-2.1.html>>
+//   for more details.
+//
+//##################################################################################################
+
+
+#pragma once
+
+#include <QModelIndexList>
+
+class QMimeData;
+
+namespace caf 
+{
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+class PdmUiDragDropHandle
+{
+public:
+    virtual ~PdmUiDragDropHandle() = 0;
+
+    virtual Qt::DropActions     supportedDropActions() const = 0;
+    virtual Qt::ItemFlags       flags(const QModelIndex &index) const = 0;
+    virtual bool                dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) = 0;
+    virtual QMimeData*          mimeData(const QModelIndexList &indexes) const = 0;
+    virtual QStringList         mimeTypes() const = 0;
+};
+
+inline PdmUiDragDropHandle::~PdmUiDragDropHandle() { }
+
+} // end namespace caf

Fwk/AppFwk/cafUserInterface/cafPdmUiTreeView.cpp

@@ -171,5 +171,13 @@ QModelIndex PdmUiTreeView::findModelIndex(const PdmUiItem* object) const
     return m_treeViewEditor->findModelIndex(object);
 }
 
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void PdmUiTreeView::setDragDropHandle(PdmUiDragDropHandle* dragDropHandle)
+{
+    m_treeViewEditor->setDragDropHandle(dragDropHandle);
+}
+
 } //End of namespace caf
 

Fwk/AppFwk/cafUserInterface/cafPdmUiTreeView.h

@@ -50,6 +50,7 @@ namespace caf
 
 class PdmUiItem;
 class PdmUiTreeViewEditor;
+class PdmUiDragDropHandle;
 
 //==================================================================================================
 /// 
@@ -77,6 +78,8 @@ public:
     PdmUiItem*  uiItemFromModelIndex(const QModelIndex& index) const;
     QModelIndex findModelIndex(const PdmUiItem* object) const;
 
+    void        setDragDropHandle(PdmUiDragDropHandle* dragDropHandle);
+
 
 signals:
     void        selectionChanged();

Fwk/AppFwk/cafUserInterface/cafPdmUiTreeViewEditor.cpp

@@ -290,5 +290,13 @@ QModelIndex PdmUiTreeViewEditor::findModelIndex(const PdmUiItem* object) const
     return m_treeViewModel->findModelIndex(object);
 }
 
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void PdmUiTreeViewEditor::setDragDropHandle(PdmUiDragDropHandle* dragDropHandle)
+{
+    m_treeViewModel->setDragDropHandle(dragDropHandle);
+}
+
 
 } // end namespace caf

Fwk/AppFwk/cafUserInterface/cafPdmUiTreeViewEditor.h

@@ -59,6 +59,7 @@ namespace caf
 class PdmUiItem;
 class PdmUiTreeViewModel;
 class PdmChildArrayFieldHandle;
+class PdmUiDragDropHandle;
 
 //--------------------------------------------------------------------------------------------------
 /// 
@@ -96,6 +97,8 @@ public:
 
     QWidget*            createWidget(QWidget* parent);
 
+    void                setDragDropHandle(PdmUiDragDropHandle* dragDropHandle);
+
 signals:
     void                selectionChanged();
 

Fwk/AppFwk/cafUserInterface/cafPdmUiTreeViewModel.cpp

@@ -39,6 +39,7 @@
 
 #include "cafPdmField.h"
 #include "cafPdmObject.h"
+#include "cafPdmUiDragDropHandle.h"
 #include "cafPdmUiTreeItemEditor.h"
 #include "cafPdmUiTreeOrdering.h"
 #include "cafPdmUiTreeViewEditor.h"
@@ -54,6 +55,8 @@ namespace caf
 PdmUiTreeViewModel::PdmUiTreeViewModel(PdmUiTreeViewEditor* treeViewEditor)
 {
     m_treeOrderingRoot = NULL;
+    m_dragDropHandle = NULL;
+
     m_treeViewEditor = treeViewEditor;
 }
 
@@ -658,6 +661,12 @@ Qt::ItemFlags PdmUiTreeViewModel::flags(const QModelIndex &index) const
         }
     }
 
+    if (m_dragDropHandle)
+    {
+        Qt::ItemFlags dragDropFlags = m_dragDropHandle->flags(index);
+        flagMask |= dragDropFlags;
+    }
+
     return flagMask;
 }
 
@@ -692,5 +701,73 @@ PdmUiItem* PdmUiTreeViewModel::uiItemFromModelIndex(const QModelIndex& index) co
     return NULL;
 }
 
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void PdmUiTreeViewModel::setDragDropHandle(PdmUiDragDropHandle* dragDropHandle)
+{
+    m_dragDropHandle = dragDropHandle;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+QStringList PdmUiTreeViewModel::mimeTypes() const
+{
+    if (m_dragDropHandle)
+    {
+        return m_dragDropHandle->mimeTypes();
+    }
+    else
+    {
+        return QAbstractItemModel::mimeTypes();
+    }
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+QMimeData * PdmUiTreeViewModel::mimeData(const QModelIndexList &indexes) const
+{
+    if (m_dragDropHandle)
+    {
+        return m_dragDropHandle->mimeData(indexes);
+    }
+    else
+    {
+        return QAbstractItemModel::mimeData(indexes);
+    }
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+bool PdmUiTreeViewModel::dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent)
+{
+    if (m_dragDropHandle)
+    {
+        return m_dragDropHandle->dropMimeData(data, action, row, column, parent);
+    }
+    else
+    {
+        return QAbstractItemModel::dropMimeData(data, action, row, column, parent);
+    }
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+Qt::DropActions PdmUiTreeViewModel::supportedDropActions() const
+{
+    if (m_dragDropHandle)
+    {
+        return m_dragDropHandle->supportedDropActions();
+    }
+    else
+    {
+        return QAbstractItemModel::supportedDropActions();
+    }
+}
+
 
 } // end namespace caf

Fwk/AppFwk/cafUserInterface/cafPdmUiTreeViewModel.h

@@ -49,6 +49,7 @@ class PdmObjectHandle;
 class PdmUiItem;
 class PdmUiTreeViewEditor;
 class PdmUiTreeOrdering;
+class PdmUiDragDropHandle;
 
 //==================================================================================================
 //
@@ -73,6 +74,8 @@ public:
     PdmUiItem*              uiItemFromModelIndex(const QModelIndex& index) const;
     QModelIndex             findModelIndex(const PdmUiItem* object) const;
 
+    void                    setDragDropHandle(PdmUiDragDropHandle* dragDropHandle);
+
 private:
     void                    updateSubTreeRecursive(const QModelIndex& uiSubTreeRootModelIdx, PdmUiTreeOrdering* uiModelSubTreeRoot, PdmUiTreeOrdering* updatedPdmSubTreeRoot);
 
@@ -90,6 +93,8 @@ private:
 
     PdmUiTreeViewEditor*    m_treeViewEditor;
 
+    PdmUiDragDropHandle*    m_dragDropHandle;
+
 private:
 
     // Overrides from QAbstractItemModel
@@ -105,6 +110,11 @@ private:
     virtual QVariant        headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole ) const;
 
     virtual Qt::ItemFlags   flags(const QModelIndex &index) const;
+
+    virtual QStringList     mimeTypes() const;
+    virtual QMimeData*      mimeData(const QModelIndexList &indexes) const;
+    virtual bool            dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent);
+    virtual Qt::DropActions supportedDropActions() const;
 };