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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include <iostream>
#include "itkRandomImageSource.h"
#include "itkShrinkImageFilter.h"
#include "itkCommand.h"
#include "itkTextOutput.h"
// The following three classes are used to support callbacks
// on the shrink filter in the pipeline that follows later
class ShowProgressObject
{
public:
ShowProgressObject(itk::ProcessObject * o) { m_Process = o; }
void
ShowProgress()
{
std::cout << "Progress " << m_Process->GetProgress() << std::endl;
}
itk::ProcessObject::Pointer m_Process;
};
class StartEndEvent
{
public:
void
Start()
{
std::cout << "start event" << std::endl;
}
void
End()
{
std::cout << "end event " << std::endl;
}
};
class AllEvents
{
public:
void
WatchEvents(itk::Object * caller, const itk::EventObject & event)
{
const char * eventName = nullptr;
if (typeid(event) == typeid(itk::DeleteEvent))
{
eventName = "DeleteEvent";
}
else if (typeid(event) == typeid(itk::StartEvent))
{
eventName = "StartEvent";
}
else if (typeid(event) == typeid(itk::EndEvent))
{
eventName = "EndEvent";
}
else if (typeid(event) == typeid(itk::ProgressEvent))
{
auto * obj = dynamic_cast<itk::ProcessObject *>(caller);
std::cout << "AnyEvent Progress " << obj->GetProgress() << std::endl;
eventName = "ProgressEvent";
}
else if (typeid(event) == typeid(itk::PickEvent))
{
eventName = "PickEvent";
}
else if (typeid(event) == typeid(itk::StartPickEvent))
{
eventName = "StartPickEvent";
}
else if (typeid(event) == typeid(itk::AbortCheckEvent))
{
eventName = "AbortCheckEvent";
}
else if (typeid(event) == typeid(itk::ExitEvent))
{
eventName = "ExitEvent";
}
else
{
eventName = "UserEvent";
}
std::cout << "Event name: " << eventName << " Id: " << event.GetEventName() << std::endl;
}
};
int
itkBasicArchitectureTest(int, char *[])
{
// Comment the following if you want to use the itk text output window
itk::OutputWindow::SetInstance(itk::TextOutput::New());
// Uncomment the following if you want to see each message independently
// itk::OutputWindow::GetInstance()->PromptUserOn();
std::cout << std::endl << "Image dimension is " << itk::Image<float, 5>::ImageDimension << std::endl;
std::cout << "Image dimension is " << itk::Image<short, 1>::ImageDimension << std::endl;
// Begin by creating a simple pipeline. Use a scalar ss a pixel.
//
// Create a type alias to make the code more digestable
using FloatImage2DType = itk::Image<float, 2>;
// Create a source object (in this case a random image generator).
// The source object is templated on the output type.
//
itk::RandomImageSource<FloatImage2DType>::Pointer random;
random = itk::RandomImageSource<FloatImage2DType>::New();
random->SetMin(0.0);
random->SetMax(1.0);
// Create a filter...shrink the image by an integral amount. We also
// add some callbacks to the start, progress, and end filter execution
// methods. The filter is templated on the input and output data types.
//
itk::ShrinkImageFilter<FloatImage2DType, FloatImage2DType>::Pointer shrink;
shrink = itk::ShrinkImageFilter<FloatImage2DType, FloatImage2DType>::New();
shrink->SetInput(random->GetOutput());
shrink->SetShrinkFactors(2);
// Create a command to call ShowProgress when progress event is triggered
ShowProgressObject progressWatch(shrink);
itk::SimpleMemberCommand<ShowProgressObject>::Pointer command;
command = itk::SimpleMemberCommand<ShowProgressObject>::New();
command->SetCallbackFunction(&progressWatch, &ShowProgressObject::ShowProgress);
shrink->AddObserver(itk::ProgressEvent(), command);
// Create a command to call StartEndEvent when start event is triggered
StartEndEvent startEndWatch;
itk::SimpleMemberCommand<StartEndEvent>::Pointer start;
start = itk::SimpleMemberCommand<StartEndEvent>::New();
start->SetCallbackFunction(&startEndWatch, &StartEndEvent::Start);
unsigned long tag = shrink->AddObserver(itk::StartEvent(), start);
// Create a command to call StartEndEvent when end event is triggered
itk::SimpleMemberCommand<StartEndEvent>::Pointer end;
end = itk::SimpleMemberCommand<StartEndEvent>::New();
end->SetCallbackFunction(&startEndWatch, &StartEndEvent::End);
shrink->AddObserver(itk::EndEvent(), end);
// Create a command that to call AnyEvent when event is fired
AllEvents allWatch;
itk::MemberCommand<AllEvents>::Pointer allEvents;
allEvents = itk::MemberCommand<AllEvents>::New();
allEvents->SetCallbackFunction(&allWatch, &AllEvents::WatchEvents);
shrink->AddObserver(itk::AnyEvent(), allEvents);
shrink->Update();
// test RemoveObserver code
shrink->RemoveObserver(tag);
return EXIT_SUCCESS;
}
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