ENH: Add the test ctkTransferFunctionwidgetTest1

Test a concrete transfer function (ctkVTKColorTransferFunction).

Libs/Visualization/VTK/Widgets/CMakeLists.txt

@@ -70,5 +70,5 @@ ctkMacroBuildQtLib(
 
 # Testing
 IF(BUILD_TESTING)
-  #ADD_SUBDIRECTORY(Testing)
+  ADD_SUBDIRECTORY(Testing)
 ENDIF(BUILD_TESTING)

Libs/Visualization/VTK/Widgets/Testing/Cpp/CMakeLists.txt

@@ -1,6 +1,7 @@
 SET(KIT ${PROJECT_NAME})
 
 CREATE_TEST_SOURCELIST(Tests ${KIT}CppTests.cpp
+  ctkTransferFunctionWidgetTest1.cpp
   #EXTRA_INCLUDE TestingMacros.h
   )
 
@@ -27,3 +28,4 @@ ENDMACRO( SIMPLE_TEST  )
 #
 
 #SIMPLE_TEST( ctkVTKObjectTest1 )
+SIMPLE_TEST( ctkTransferFunctionWidgetTest1 )

Libs/Visualization/VTK/Widgets/Testing/Cpp/ctkTransferFunctionWidgetTest1.cpp

@@ -0,0 +1,58 @@
+/*=========================================================================
+
+  Library:   qCTK
+
+  Copyright (c) Kitware Inc. 
+  All rights reserved.
+  Distributed under a BSD License. See LICENSE.txt file.
+
+  This software is distributed "AS IS" WITHOUT ANY WARRANTY; without even
+  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the above copyright notice for more information.
+
+=========================================================================*/
+
+// Qt includes
+#include <QApplication>
+#include <QSharedPointer>
+#include <QTimer>
+
+// CTK includes
+#include "ctkTransferFunction.h"
+#include "ctkTransferFunctionWidget.h"
+#include "ctkVTKColorTransferFunction.h"
+
+// VTK includes
+#include <vtkColorTransferFunction.h>
+#include <vtkSmartPointer.h>
+
+// STD includes
+#include <iostream>
+
+//-----------------------------------------------------------------------------
+int ctkTransferFunctionWidgetTest1(int argc, char * argv [] )
+{
+  QApplication app(argc, argv);
+  
+  vtkSmartPointer<vtkColorTransferFunction> ctf = 
+    vtkSmartPointer<vtkColorTransferFunction>::New();
+  //
+  ctf->AddRGBPoint(0., 1.,0.,0.);
+  ctf->AddRGBPoint(0.5, 0.,0.,1.);
+  ctf->AddRGBPoint(1., 0.,1.,0.);
+  //ctf->AddHSVPoint(0., 0.,1.,1.);
+  //ctf->AddHSVPoint(1., 0.66666,1.,1.);
+
+  QSharedPointer<ctkTransferFunction> transferFunction = 
+    QSharedPointer<ctkTransferFunction>(new ctkVTKColorTransferFunction(ctf));
+  ctkTransferFunctionWidget transferFunctionWidget(transferFunction.data(), 0);
+  // the widget is not really shown here, only when app.exec() is called
+  transferFunctionWidget.show();
+
+  ctf->AddRGBPoint(0.7, 0.0,0.0,0.0);
+  //ctkTransferFunctionWidget* toto = new ctkTransferFunctionWidget();
+  QTimer autoExit;
+  QObject::connect(&autoExit, SIGNAL(timeout()), &app, SLOT(quit()));
+  autoExit.start(1000);
+  return app.exec();
+}