Implement basic move algorithm, connect it to drag&drop

apps/opencs/view/world/dragdroputils.cpp

@@ -15,7 +15,15 @@ bool CSVWorld::DragDropUtils::canAcceptData(const QDropEvent &event, CSMWorld::C
     return data != nullptr && data->holdsType(type);
 }
 
-CSMWorld::UniversalId CSVWorld::DragDropUtils::getAcceptedData(const QDropEvent &event, 
+bool CSVWorld::DragDropUtils::isInfo(const QDropEvent &event, CSMWorld::ColumnBase::Display type)
+{
+    const CSMWorld::TableMimeData *data = getTableMimeData(event);
+    return data != nullptr && (
+        data->holdsType(CSMWorld::UniversalId::Type_TopicInfo) ||
+        data->holdsType(CSMWorld::UniversalId::Type_JournalInfo) );
+}
+
+CSMWorld::UniversalId CSVWorld::DragDropUtils::getAcceptedData(const QDropEvent &event,
                                                                CSMWorld::ColumnBase::Display type)
 {
     if (canAcceptData(event, type))

apps/opencs/view/world/dragdroputils.hpp

@@ -20,6 +20,9 @@ namespace CSVWorld
         bool canAcceptData(const QDropEvent &event, CSMWorld::ColumnBase::Display type);
         ///< Checks whether the \a event contains a valid CSMWorld::TableMimeData that holds the \a type
 
+        bool isInfo(const QDropEvent &event, CSMWorld::ColumnBase::Display type);
+        ///< Info types can be dragged to sort the info table
+
         CSMWorld::UniversalId getAcceptedData(const QDropEvent &event, CSMWorld::ColumnBase::Display type);
         ///< Gets the accepted data from the \a event using the \a type
         ///< \return Type_None if the \a event data doesn't holds the \a type

apps/opencs/view/world/dragrecordtable.cpp

@@ -46,7 +46,8 @@ void CSVWorld::DragRecordTable::dragEnterEvent(QDragEnterEvent *event)
 void CSVWorld::DragRecordTable::dragMoveEvent(QDragMoveEvent *event)
 {
     QModelIndex index = indexAt(event->pos());
-    if (CSVWorld::DragDropUtils::canAcceptData(*event, getIndexDisplayType(index)))
+    if (CSVWorld::DragDropUtils::canAcceptData(*event, getIndexDisplayType(index)) ||
+        CSVWorld::DragDropUtils::isInfo(*event, getIndexDisplayType(index)) )
     {
         if (index.flags() & Qt::ItemIsEditable)
         {
@@ -75,6 +76,10 @@ void CSVWorld::DragRecordTable::dropEvent(QDropEvent *event)
             }
         }
     }
+    else if (CSVWorld::DragDropUtils::isInfo(*event, display) && event->source() == this)
+    {
+        emit moveRecordsFromSameTable(event);
+    }
 }
 
 CSMWorld::ColumnBase::Display CSVWorld::DragRecordTable::getIndexDisplayType(const QModelIndex &index) const

apps/opencs/view/world/dragrecordtable.hpp

@@ -23,6 +23,8 @@ namespace CSVWorld
 {
     class DragRecordTable : public QTableView
     {
+        Q_OBJECT
+
         protected:
             CSMDoc::Document& mDocument;
             bool mEditLock;
@@ -45,6 +47,9 @@ namespace CSVWorld
 
         private:
             CSMWorld::ColumnBase::Display getIndexDisplayType(const QModelIndex &index) const;
+
+        signals:
+            void moveRecordsFromSameTable(QDropEvent *event);
     };
 }
 

apps/opencs/view/world/table.cpp

@@ -7,6 +7,7 @@
 #include <QString>
 #include <QtCore/qnamespace.h>
 
+#include <components/debug/debuglog.hpp>
 #include <components/misc/helpviewer.hpp>
 #include <components/misc/stringops.hpp>
 
@@ -248,6 +249,7 @@ CSVWorld::Table::Table (const CSMWorld::UniversalId& id,
     if (isInfoTable)
     {
         mProxyModel = new CSMWorld::InfoTableProxyModel(id.getType(), this);
+        connect (this, &CSVWorld::DragRecordTable::moveRecordsFromSameTable, this, &CSVWorld::Table::moveRecords);
     }
     else if (isLtexTable)
     {
@@ -563,6 +565,74 @@ void CSVWorld::Table::moveDownRecord()
     }
 }
 
+void CSVWorld::Table::moveRecords(QDropEvent *event)
+{
+    if (mEditLock || (mModel->getFeatures() & CSMWorld::IdTableBase::Feature_Constant))
+        return;
+
+    QModelIndex targedIndex = indexAt(event->pos());
+
+    QModelIndexList selectedRows = selectionModel()->selectedRows();
+    int targetRow = targedIndex.row();
+    int baseRow = targedIndex.row() - 1;
+    int highestDifference = 0;
+
+    for (const auto& thisRowData : selectedRows)
+    {
+        if (std::abs(targetRow - thisRowData.row()) > highestDifference) highestDifference = std::abs(targetRow - thisRowData.row());
+        if (thisRowData.row() - 1 < baseRow) baseRow = thisRowData.row() - 1;
+    }
+
+    std::vector<int> newOrder (highestDifference + 1);
+
+    for (long unsigned int i = 0; i < newOrder.size(); ++i)
+    {
+        newOrder[i] = i;
+    }
+
+    if (selectedRows.size() > 1)
+    {
+        Log(Debug::Warning) << "Move operation failed: Moving multiple selections isn't implemented.";
+        return;
+    }
+
+    for (const auto& thisRowData : selectedRows)
+    {
+        /*
+            Moving algorithm description
+            a) Remove the (ORIGIN + 1)th list member.
+            b) Add (ORIGIN+1)th list member with value TARGET
+            c) If ORIGIN > TARGET,d_INC; ELSE d_DEC
+            d_INC) increase all members after (and including) the TARGET by one, stop before hitting ORIGINth address
+            d_DEC)  decrease all members after the ORIGIN by one, stop after hitting address TARGET
+        */
+
+        int originRow = thisRowData.row();
+        //int sourceMappedOriginRow = mProxyModel->mapToSource (mProxyModel->index (originRow, 0)).row();
+
+        newOrder.erase(newOrder.begin() +  originRow - baseRow - 1);
+        newOrder.emplace(newOrder.begin() + originRow - baseRow - 1, targetRow - baseRow - 1);
+
+        if (originRow > targetRow)
+        {
+            for (int i = targetRow - baseRow - 1; i < originRow - baseRow - 1; ++i)
+            {
+                ++newOrder[i];
+            }
+        }
+        else
+        {
+            for (int i = originRow - baseRow; i <= targetRow - baseRow - 1; ++i)
+            {
+                --newOrder[i];
+            }
+        }
+
+    }
+    mDocument.getUndoStack().push (new CSMWorld::ReorderRowsCommand (
+        dynamic_cast<CSMWorld::IdTable&> (*mModel), baseRow + 1, newOrder));
+}
+
 void CSVWorld::Table::editCell()
 {
     emit editRequest(mEditIdAction->getCurrentId(), "");

apps/opencs/view/world/table.hpp

@@ -141,6 +141,8 @@ namespace CSVWorld
 
             void moveDownRecord();
 
+            void moveRecords(QDropEvent *event);
+
             void viewRecord();
 
             void previewRecord();