Add QgsComposerMultiFrame as base class for multi-frame composer content

src/core/CMakeLists.txt

@@ -133,6 +133,7 @@ SET(QGIS_CORE_SRCS
   composer/qgsnumericscalebarstyle.cpp
   composer/qgssingleboxscalebarstyle.cpp
   composer/qgsticksscalebarstyle.cpp
+  composer/qgscomposermultiframe.cpp
   composer/qgscomposition.cpp
 
   pal/costcalculator.cpp
@@ -280,6 +281,7 @@ SET(QGIS_CORE_MOC_HDRS
   composer/qgscomposerlabel.h
   composer/qgscomposershape.h
   composer/qgscomposerattributetable.h
+  composer/qgscomposermultiframe.h
   composer/qgscomposition.h
 
   composer/qgslegendmodel.h

src/core/composer/qgscomposermultiframe.cpp

@@ -0,0 +1,18 @@
+#include "qgscomposermultiframe.h"
+
+QgsComposerMultiFrame::QgsComposerMultiFrame( QgsComposition* c ): mComposition( c )
+{
+}
+
+QgsComposerMultiFrame::QgsComposerMultiFrame(): mComposition( 0 )
+{
+}
+
+QgsComposerMultiFrame::~QgsComposerMultiFrame()
+{
+}
+
+void QgsComposerMultiFrame::recalculateFrameSizes()
+{
+    //todo...
+}

src/core/composer/qgscomposermultiframe.h

@@ -0,0 +1,36 @@
+#ifndef QGSCOMPOSERMULTIFRAME_H
+#define QGSCOMPOSERMULTIFRAME_H
+
+#include <QObject>
+#include <QSizeF>
+
+class QgsComposerItem;
+class QgsComposition;
+
+/**Abstract base class for composer entries with the ability to distribute the content to several frames (items)*/
+class QgsComposerMultiFrame: public QObject
+{
+    Q_OBJECT
+    public:
+
+        enum ResizeMode
+        {
+            ExtendToNextPage = 0, //duplicates last frame to next page to fit the total size
+            UseExistingFrames //
+        };
+
+        QgsComposerMultiFrame( QgsComposition* c );
+        virtual ~QgsComposerMultiFrame();
+        virtual QSizeF totalSize() = 0;
+
+    protected:
+        QgsComposition* mComposition;
+        QList<QgsComposerItem*> mFrameItems;
+
+        void recalculateFrameSizes();
+
+    private:
+        QgsComposerMultiFrame(); //forbidden
+};
+
+#endif // QGSCOMPOSERMULTIFRAME_H