ShareCameraQt

Code¶

ShareCameraQt.cxx

#include "ShareCameraQt.h"

#include <vtkCommand.h>
#include <vtkDataObjectToTable.h>
#include <vtkElevationFilter.h>
#include <vtkGenericOpenGLRenderWindow.h>
#include <vtkPolyDataMapper.h>
#include <vtkQtTableView.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkSphereSource.h>
#include <vtkCubeSource.h>

#include <vtkSmartPointer.h>

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

  vtkNew<vtkGenericOpenGLRenderWindow> renderWindowLeft;
  this->qvtkWidgetLeft->SetRenderWindow(renderWindowLeft);
  vtkNew<vtkGenericOpenGLRenderWindow> renderWindowRight;
  this->qvtkWidgetRight->SetRenderWindow(renderWindowRight);


  // Sphere
  vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->Update();
  vtkSmartPointer<vtkPolyDataMapper> sphereMapper =vtkSmartPointer<vtkPolyDataMapper>::New();
  sphereMapper->SetInputConnection(sphereSource->GetOutputPort());
  vtkSmartPointer<vtkActor> sphereActor = vtkSmartPointer<vtkActor>::New();
  sphereActor->SetMapper(sphereMapper);

  // Cube
  vtkSmartPointer<vtkCubeSource> cubeSource = vtkSmartPointer<vtkCubeSource>::New();
  cubeSource->Update();
  vtkSmartPointer<vtkPolyDataMapper> cubeMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
  cubeMapper->SetInputConnection(cubeSource->GetOutputPort());
  vtkSmartPointer<vtkActor> cubeActor = vtkSmartPointer<vtkActor>::New();
  cubeActor->SetMapper(cubeMapper);

  // VTK Renderer
  vtkSmartPointer<vtkRenderer> leftRenderer = vtkSmartPointer<vtkRenderer>::New();
  leftRenderer->AddActor(sphereActor);

  vtkSmartPointer<vtkRenderer> rightRenderer = vtkSmartPointer<vtkRenderer>::New();

  // Add Actor to renderer
  rightRenderer->AddActor(cubeActor);

  // VTK/Qt wedded
  this->qvtkWidgetLeft->GetRenderWindow()->AddRenderer(leftRenderer);
  this->qvtkWidgetRight->GetRenderWindow()->AddRenderer(rightRenderer);

  rightRenderer->ResetCamera();
  leftRenderer->ResetCamera();

  rightRenderer->SetActiveCamera(leftRenderer->GetActiveCamera());

  // Set up action signals and slots
  connect(this->actionExit, SIGNAL(triggered()), this, SLOT(slotExit()));

  //this->qvtkWidgetLeft->GetRenderWindow()->AddObserver(vtkCommand::ModifiedEvent, this, &ShareCameraQt::ModifiedHandler);
  this->qvtkWidgetLeft->GetRenderWindow()->AddObserver(vtkCommand::AnyEvent, this, &ShareCameraQt::ModifiedHandler);

}

void ShareCameraQt::ModifiedHandler()
{
  this->qvtkWidgetRight->GetRenderWindow()->Render();
}

void ShareCameraQt::slotExit()
{
  qApp->exit();
}

ShareCameraQt.h

#ifndef ShareCameraQt_H
#define ShareCameraQt_H

#include <QMainWindow>
#include "ui_ShareCameraQt.h"

class ShareCameraQt : public QMainWindow, public Ui::ShareCameraQt
{
  Q_OBJECT
public:

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

public slots:

  virtual void slotExit();

protected:
   void ModifiedHandler();
};

#endif

ShareCameraQtDriver.cxx

#include <QApplication>
#include <QSurfaceFormat>
#include <QVTKOpenGLWidget.h>

#include "ShareCameraQt.h"

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

  // QT Stuff
  QApplication app( argc, argv );

  ShareCameraQt shareCameraQt;
  shareCameraQt.show();

  return app.exec();
}

ShareCameraQt.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>ShareCameraQt</class>
 <widget class="QMainWindow" name="ShareCameraQt">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>990</width>
    <height>583</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>ShareCameraQt</string>
  </property>
  <property name="windowIcon">
   <iconset resource="Icons/icons.qrc">
    <normaloff>:/Icons/help.png</normaloff>:/Icons/help.png</iconset>
  </property>
  <property name="iconSize">
   <size>
    <width>22</width>
    <height>22</height>
   </size>
  </property>
  <widget class="QWidget" name="centralwidget">
   <widget class="QVTKOpenGLWidget" name="qvtkWidgetLeft">
    <property name="geometry">
     <rect>
      <x>10</x>
      <y>20</y>
      <width>511</width>
      <height>541</height>
     </rect>
    </property>
   </widget>
   <widget class="QVTKOpenGLWidget" name="qvtkWidgetRight">
    <property name="geometry">
     <rect>
      <x>540</x>
      <y>20</y>
      <width>441</width>
      <height>541</height>
     </rect>
    </property>
   </widget>
  </widget>
  <action name="actionOpenFile">
   <property name="enabled">
    <bool>true</bool>
   </property>
   <property name="icon">
    <iconset resource="Icons/icons.qrc">
     <normaloff>:/Icons/fileopen.png</normaloff>:/Icons/fileopen.png</iconset>
   </property>
   <property name="text">
    <string>Open File...</string>
   </property>
  </action>
  <action name="actionExit">
   <property name="icon">
    <iconset>
     <normaloff/>
    </iconset>
   </property>
   <property name="text">
    <string>Exit</string>
   </property>
  </action>
  <action name="actionPrint">
   <property name="icon">
    <iconset resource="Icons/icons.qrc">
     <normaloff>:/Icons/print.png</normaloff>:/Icons/print.png</iconset>
   </property>
   <property name="text">
    <string>Print</string>
   </property>
  </action>
  <action name="actionHelp">
   <property name="icon">
    <iconset resource="Icons/icons.qrc">
     <normaloff>:/Icons/help.png</normaloff>:/Icons/help.png</iconset>
   </property>
   <property name="text">
    <string>Help</string>
   </property>
  </action>
  <action name="actionSave">
   <property name="icon">
    <iconset resource="Icons/icons.qrc">
     <normaloff>:/Icons/filesave.png</normaloff>:/Icons/filesave.png</iconset>
   </property>
   <property name="text">
    <string>Save</string>
   </property>
  </action>
 </widget>
 <customwidgets>
  <customwidget>
   <class>QVTKOpenGLWidget</class>
   <extends>QWidget</extends>
   <header>QVTKOpenGLWidget.h</header>
  </customwidget>
 </customwidgets>
 <resources>
  <include location="Icons/icons.qrc"/>
 </resources>
 <connections/>
</ui>

CMakeLists.txt¶

cmake_minimum_required(VERSION 2.8)

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

PROJECT(ShareCameraQt)

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(ShareCameraQt MACOSX_BUNDLE
    ${CXX_FILES} ${UISrcs} ${QT_WRAP})
  qt5_use_modules(ShareCameraQt Core Gui)
  target_link_libraries(ShareCameraQt ${VTK_LIBRARIES})
else()
  QT4_WRAP_UI(UISrcs ${UI_FILES})
  QT4_WRAP_CPP(MOCSrcs ${QT_WRAP})
  add_executable(ShareCameraQt MACOSX_BUNDLE ${CXX_FILES} ${UISrcs} ${MOCSrcs})
  target_link_libraries(ShareCameraQt ${VTK_LIBRARIES})
endif()

Download and Build ShareCameraQt¶

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

 cd ShareCameraQt/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:

./ShareCameraQt

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.