本文章不適合vtk8.9以下的使用者。

程式碼

RenderWindowUISingleInheritance.cxx

#include "RenderWindowUISingleInheritance.h"

// This is included here because it is forward declared in
// RenderWindowUISingleInheritance.h
#include "ui_RenderWindowUISingleInheritance.h"

#include <vtkGenericOpenGLRenderWindow.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkSphereSource.h>
#include <vtkVersion.h>

#if VTK_VERSION_NUMBER >= 89000000000ULL
#define VTK890 1
#endif

// Constructor
RenderWindowUISingleInheritance::RenderWindowUISingleInheritance()
{
  this->ui = new Ui_RenderWindowUISingleInheritance;
  this->ui->setupUi(this);

  vtkNew<vtkNamedColors> colors;

  vtkNew<vtkGenericOpenGLRenderWindow> renderWindow;
#if VTK890
  this->ui->qvtkWidget->setRenderWindow(renderWindow);
#else
  this->ui->qvtkWidget->SetRenderWindow(renderWindow);
#endif

  // Sphere
  vtkNew<vtkSphereSource> sphereSource;
  sphereSource->Update();
  vtkNew<vtkPolyDataMapper> sphereMapper;
  sphereMapper->SetInputConnection(sphereSource->GetOutputPort());
  vtkNew<vtkActor> sphereActor;
  sphereActor->SetMapper(sphereMapper);
  sphereActor->GetProperty()->SetColor(colors->GetColor4d("Tomato").GetData());

  // VTK Renderer
  vtkNew<vtkRenderer> renderer;
  renderer->AddActor(sphereActor);
  renderer->SetBackground(colors->GetColor3d("SteelBlue").GetData());

  // VTK/Qt wedded
#if VTK890
  this->ui->qvtkWidget->renderWindow()->AddRenderer(renderer);
  this->ui->qvtkWidget->renderWindow()->SetWindowName(
      "RenderWindowUISingleInheritance");
#else
  this->ui->qvtkWidget->GetRenderWindow()->AddRenderer(renderer);
  this->ui->qvtkWidget->GetRenderWindow()->SetWindowName(
      "RenderWindowUISingleInheritance");
#endif
  // Set up action signals and slots
  connect(this->ui->actionExit, SIGNAL(triggered()), this, SLOT(slotExit()));
}

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

RenderWindowUISingleInheritanceDriver.cxx

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

#include "RenderWindowUISingleInheritance.h"

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

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

  RenderWindowUISingleInheritance renderWindowUISingleInheritance;
  renderWindowUISingleInheritance.show();

  return app.exec();
}

RenderWindowUISingleInheritance.h

#ifndef RenderWindowUISingleInheritance_H
#define RenderWindowUISingleInheritance_H

#include <vtkSmartPointer.h>

#include <QMainWindow>

// Forward Qt class declarations
class Ui_RenderWindowUISingleInheritance;

class RenderWindowUISingleInheritance : public QMainWindow
{
  Q_OBJECT
public:
  // Constructor/Destructor
  RenderWindowUISingleInheritance();
  ~RenderWindowUISingleInheritance() = default;

public slots:

  void slotExit();

private:
  // Designer form
  Ui_RenderWindowUISingleInheritance* ui;
};

#endif

RenderWindowUISingleInheritance.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>RenderWindowUISingleInheritance</class>
 <widget class="QMainWindow" name="RenderWindowUISingleInheritance">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>541</width>
    <height>583</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>RenderWindowUISingleInheritance</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <widget class="QVTKOpenGLNativeWidget" name="qvtkWidget">
    <property name="geometry">
     <rect>
      <x>10</x>
      <y>20</y>
      <width>511</width>
      <height>541</height>
     </rect>
    </property>
   </widget>
  </widget>
  <action name="actionOpenFile">
   <property name="enabled">
    <bool>true</bool>
   </property>
   <property name="text">
    <string>Open File...</string>
   </property>
  </action>
  <action name="actionExit">
   <property name="text">
    <string>Exit</string>
   </property>
  </action>
  <action name="actionPrint">
   <property name="text">
    <string>Print</string>
   </property>
  </action>
  <action name="actionHelp">
   <property name="text">
    <string>Help</string>
   </property>
  </action>
  <action name="actionSave">
   <property name="text">
    <string>Save</string>
   </property>
  </action>
 </widget>
 <customwidgets>
  <customwidget>
   <class>QVTKOpenGLNativeWidget</class>
   <extends>QWidget</extends>
   <header>QVTKOpenGLNativeWidget.h</header>
  </customwidget>
 </customwidgets>
 <resources>

 </resources>
 <connections/>
</ui>

CMakeLists.txt

本人不用，直接用qmake *.pro檔案

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

if(POLICY CMP0020)
  cmake_policy(SET CMP0020 NEW)
  cmake_policy(SET CMP0071 NEW)
endif()

PROJECT(RenderWindowUISingleInheritance)

find_package(VTK COMPONENTS

  vtkCommonColor
  vtkCommonCore
  vtkFiltersSources
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping RenderWindowUISingleInheritance: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")

if(vtkGUISupportQt_LOADED OR TARGET VTK::GUISupportQt)
  if (VTK_VERSION VERSION_LESS "8.90.0")
    # Instruct CMake to run moc automatically when needed.
    set(CMAKE_AUTOMOC ON)
  else()
     # Instruct CMake to run moc automatically when needed.
    set(CMAKE_AUTOMOC ON)
    set(CMAKE_AUTOUIC ON)
  endif()
  # We have ui files, this will bring in the macro: qt5_wrap_ui
  find_package(Qt5Widgets REQUIRED QUIET)
else()
  message(STATUS "GuiSupportQt not found.")
  return()
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)

qt5_wrap_ui(UISrcs ${UI_FILES})

if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  # CMAKE_AUTOMOC in ON so the MOC headers will be automatically wrapped.
  add_executable(RenderWindowUISingleInheritance MACOSX_BUNDLE
    ${CXX_FILES} ${UISrcs} ${QT_WRAP})
  qt5_use_modules(RenderWindowUISingleInheritance Core Gui)
  target_link_libraries(RenderWindowUISingleInheritance ${VTK_LIBRARIES})
else()
  # CMAKE_AUTOMOC in ON so the MOC headers will be automatically wrapped.
  add_executable(RenderWindowUISingleInheritance MACOSX_BUNDLE
    ${CXX_FILES} ${UISrcs} ${QT_WRAP})
  qt5_use_modules(RenderWindowUISingleInheritance Core Gui)
  target_link_libraries(RenderWindowUISingleInheritance ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS RenderWindowUISingleInheritance
    MODULES ${VTK_LIBRARIES}
  )
endif()

執行結果：

總結

也是比較簡易的例項，多謝，親愛的美美。