WindowModifiedEvent
VTKExamples/Cxx/Utilities/WindowModifiedEvent
Description
This example limits the horizontal window size to 400.
Code
WindowModifiedEvent.cxx
#include <vtkSphereSource.h>
#include <vtkPolyData.h>
#include <vtkSmartPointer.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkCallbackCommand.h>
void WindowModifiedCallback( vtkObject*
caller, long unsigned int vtkNotUsed(eventId), void* vtkNotUsed(clientData), void* vtkNotUsed(callData) )
{
std::cout << "Window modified" << std::endl;
std::cout << caller->GetClassName() << std::endl;
vtkRenderWindow* window = static_cast<vtkRenderWindow*>(caller);
int* windowSize = window->GetSize();
std::cout << "Size: " << windowSize[0] << " " << windowSize[1] << std::endl;
if(windowSize[0] > 400)
{
window->SetSize(400, windowSize[1]);
window->Render();
window->Modified();
window->Render();
}
}
int main(int, char *[])
{
// Create a sphere
vtkSmartPointer<vtkSphereSource> sphereSource =
vtkSmartPointer<vtkSphereSource>::New();
sphereSource->Update();
// Create a mapper and actor
vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(sphereSource->GetOutputPort());
vtkSmartPointer<vtkActor> actor =
vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);
// Create a renderer, render window, and interactor
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);
// Add the actor to the scene
renderer->AddActor(actor);
renderer->SetBackground(1,1,1); // Background color white
vtkSmartPointer<vtkCallbackCommand> m_pModifiedCallback =
vtkSmartPointer<vtkCallbackCommand>::New();
m_pModifiedCallback->SetCallback (WindowModifiedCallback);
//m_pModifiedCallback->SetClientData(this);
renderWindow->AddObserver(vtkCommand::ModifiedEvent,m_pModifiedCallback);
// Render and interact
renderWindow->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(WindowModifiedEvent)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(WindowModifiedEvent MACOSX_BUNDLE WindowModifiedEvent.cxx)
target_link_libraries(WindowModifiedEvent ${VTK_LIBRARIES})
Download and Build WindowModifiedEvent
Click here to download WindowModifiedEvent and its CMakeLists.txt file. Once the tarball WindowModifiedEvent.tar has been downloaded and extracted,
cd WindowModifiedEvent/build
If VTK is 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 ..
Build the project:
make
and run it:
./WindowModifiedEvent
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.