# BorderWidgetQt

VTKExamples/Cxx/Qt/BorderWidgetQt

### Code

BorderWidgetQt.cxx

    #include "BorderWidgetQt.h"

    #include <vtkBorderWidget.h>
    #include <vtkCommand.h>
    #include <vtkGenericOpenGLRenderWindow.h>
    #include <vtkNew.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkRenderer.h>
    #include <vtkRenderWindow.h>
    #include <vtkSmartPointer.h>
    #include <vtkSphereSource.h>

    class BorderCallback : public vtkCommand
    {
      public:
        BorderCallback(){}

        static BorderCallback *New()
        {
          return new BorderCallback;
        }

      virtual void Execute(vtkObject *vtkNotUsed(caller), unsigned long, void*)
      {
    //      vtkBorderWidget *borderWidget =
    //          reinterpret_cast<vtkBorderWidget*>(caller);
      }

    };

    // Constructor
    BorderWidgetQt::BorderWidgetQt()
    {
      this->setupUi(this);

      vtkNew<vtkGenericOpenGLRenderWindow> renderWindow;
      this->qvtkWidget->SetRenderWindow(renderWindow);

      // Sphere
      vtkNew<vtkSphereSource> sphereSource;
      sphereSource->Update();
      vtkNew<vtkPolyDataMapper> sphereMapper;
      sphereMapper->SetInputConnection(sphereSource->GetOutputPort());
      vtkNew<vtkActor> sphereActor;
      sphereActor->SetMapper(sphereMapper);

      // VTK Renderer
      vtkNew<vtkRenderer> renderer;
      renderer->AddActor(sphereActor);

      // Connect VTK with Qt
      this->qvtkWidget->GetRenderWindow()->AddRenderer(renderer);

      // Add a border widget to the right renderer
      vtkNew<vtkBorderWidget> bw;
      this->BorderWidget = bw;
      this->BorderWidget->SetInteractor(this->qvtkWidget->GetInteractor());
      this->BorderWidget->On();
    }

BorderWidgetQt.h

    #ifndef BorderWidgetQt_H
    #define BorderWidgetQt_H

    #include <vtkSmartPointer.h>
    #include <QMainWindow>

    class vtkBorderWidget;

    #include "ui_BorderWidgetQt.h"

    class BorderWidgetQt : public QMainWindow, private Ui::BorderWidgetQt
    {
      Q_OBJECT
    public:

      // Constructor/Destructor
      BorderWidgetQt();
      ~BorderWidgetQt() {}

    private:
      vtkSmartPointer<vtkBorderWidget> BorderWidget;
    };

    #endif

BorderWidgetQt.h

    #ifndef BorderWidgetQt_H
    #define BorderWidgetQt_H

    #include <vtkSmartPointer.h>
    #include <QMainWindow>

    class vtkBorderWidget;

    #include "ui_BorderWidgetQt.h"

    class BorderWidgetQt : public QMainWindow, private Ui::BorderWidgetQt
    {
      Q_OBJECT
    public:

      // Constructor/Destructor
      BorderWidgetQt();
      ~BorderWidgetQt() {}

    private:
      vtkSmartPointer<vtkBorderWidget> BorderWidget;
    };

    #endif

BorderWidgetQtDriver.cxx

    #include <QApplication>
    #include <QSurfaceFormat>
    #include "BorderWidgetQt.h"

    int main(int argc, char* argv[])
    {
      // needed to ensure appropriate OpenGL context is created for VTK rendering.
      QSurfaceFormat::setDefaultFormat(QVTKOpenGLWidget::defaultFormat());

      QApplication app( argc, argv );

      BorderWidgetQt borderWidgetQt;
      borderWidgetQt.show();

      return app.exec();
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    if(POLICY CMP0020)
      cmake_policy(SET CMP0020 NEW)
    endif()

    PROJECT(BorderWidgetQt)

    find_package(VTK REQUIRED)
    include(${VTK_USE_FILE})

    if(${VTK_VERSION} VERSION_GREATER "6" AND VTK_QT_VERSION VERSION_GREATER "4")
      # Instruct CMake to run moc automatically when needed.
      set(CMAKE_AUTOMOC ON)
      find_package(Qt5Widgets REQUIRED QUIET)
    else()
      find_package(Qt4 REQUIRED)
      include(${QT_USE_FILE})
    endif()

    include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})

    file(GLOB UI_FILES *.ui)
    file(GLOB QT_WRAP *.h)
    file(GLOB CXX_FILES *.cxx)

    if(${VTK_VERSION} VERSION_GREATER "6" AND VTK_QT_VERSION VERSION_GREATER "4")
      qt5_wrap_ui(UISrcs ${UI_FILES} )
      # CMAKE_AUTOMOC in ON so the MOC headers will be automatically wrapped.
      add_executable(BorderWidgetQt MACOSX_BUNDLE
        ${CXX_FILES} ${UISrcs} ${QT_WRAP})
      qt5_use_modules(BorderWidgetQt Core Gui)
      target_link_libraries(BorderWidgetQt ${VTK_LIBRARIES})
    else()
      QT4_WRAP_UI(UISrcs ${UI_FILES})
      QT4_WRAP_CPP(MOCSrcs ${QT_WRAP})
      add_executable(BorderWidgetQt MACOSX_BUNDLE ${CXX_FILES} ${UISrcs} ${MOCSrcs})
      target_link_libraries(BorderWidgetQt ${VTK_LIBRARIES})
    endif()

### Download and Build BorderWidgetQt

Click here to download BorderWidgetQt and its CMakeLists.txt file. Once the tarball BorderWidgetQt.tar has been downloaded and extracted,

     cd BorderWidgetQt/build

This example requires Qt and VTK.

If VTK and Qt are installed:

     cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

     cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

If Qt is not found on your system, you will need to tell CMake where to find qmake:

    cmake -DQT_QMAKE_EXECUTABLE:FILEPATH=/usr/something/qmake  ..

Build the project:

    make

and run it:

    ./BorderWidgetQt

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time. You may also need to add a Qt related path.