Avoid include in headers

ApplicationLibCode/UserInterface/RiuMatrixPlotWidget.cpp

@@ -29,6 +29,7 @@
 #include "RiuQwtLinearScaleEngine.h"
 #include "RiuQwtPlotItem.h"
 #include "RiuQwtPlotTools.h"
+#include "RiuQwtPlotWidget.h"
 #include "RiuScalarMapperLegendFrame.h"
 
 #include "cvfColor3.h"

ApplicationLibCode/UserInterface/RiuMatrixPlotWidget.h

@@ -20,7 +20,6 @@
 
 #include "RiuInterfaceToViewWindow.h"
 #include "RiuPlotItem.h"
-#include "RiuQwtPlotWidget.h"
 
 #include "cafPdmPointer.h"
 #include "cafSignal.h"
@@ -35,6 +34,7 @@
 class RimViewWindow;
 class RimRegularLegendConfig;
 class RiuAbstractLegendFrame;
+class RiuQwtPlotWidget;
 
 class RiuMatrixPlotWidget : public QWidget, public RiuInterfaceToViewWindow, public caf::SignalEmitter
 {

ApplicationLibCode/UserInterface/RiuSummaryQwtPlot.h

@@ -21,7 +21,6 @@
 #include "RiaDateTimeDefines.h"
 
 #include "RiuInterfaceToViewWindow.h"
-#include "RiuQwtPlotWidget.h"
 #include "RiuSummaryPlot.h"
 
 #include <QPointer>
@@ -34,6 +33,7 @@ class RiuQwtPlotWheelZoomer;
 class RimPlotAxisPropertiesInterface;
 class RiuPlotAnnotationTool;
 class RiuQwtCurvePointTracker;
+class RiuQwtPlotWidget;
 
 //==================================================================================================
 //