/***********************************************************************************
*
* Itala API - Copyright (C) 2022 Opto Engineering
*
* THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY SUFFERED BY LICENSE AS
* A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
*
***********************************************************************************/
/**
* @example NodeMapPolling.cpp
*
* @brief "NodeMapPolling" example shows how user-defined callbacks are
* executed by GenApi when the node they're registered to changes due
* to a polling operation. Every "pollable" feature has a specific
* polling time defined by the manufacturer. When the Poll function is
* called on the nodemap by the client code, the time elapsed since the
* last poll must be specified. All features with a polling time shorter
* than the elapsed time are automatically read and updated by GenApi.
*
* @see NodeCallback.cpp
* @see Events.cpp
*/
// Include Itala API
#include "ItalaApi/Itala.h"
// Include the GenICam library
#include "GenICam.h"
#include <thread>
#include <chrono>
#define INDENT "\t"
#define TEMPERATURE_READS 10
#define POLL_FREQ_MS 750
// Callback function called on DeviceTemperature node change.
void OnDeviceTemperatureChanged(GenApi::INode* node)
{
GenApi::CFloatPtr pDeviceTemperature = node;
std::cout << INDENT << "OnDeviceTemperatureChanged function called." << std::endl;
std::cout << INDENT << "Device temperature node changed. New value is " <<
pDeviceTemperature->GetValue() << " C\370." << std::endl << std::endl;
}
void NodeMapPolling_Sample()
{
std::cout << "***** NodeMapPolling example started. *****" << std::endl << std::endl;
Itala::ISystem* pSystem = Itala::CreateSystem();
Itala::DeviceInfoList deviceInfos = pSystem->EnumerateDevices(700);
if (deviceInfos.size() == 0)
throw GENERIC_EXCEPTION("No devices found. Example canceled.");
if (deviceInfos[0].AccessStatus() != Itala::DeviceAccessStatus::AvailableReadWrite)
throw GENERIC_EXCEPTION("Target device is unaccessible in RW mode. Example canceled.");
Itala::IDevice* pDevice = pSystem->CreateDevice(deviceInfos[0]);
std::cout << "First device initialized." << std::endl;
GenApi::CFloatPtr pDeviceTemperature = pDevice->GetNodeMap().GetNode("DeviceTemperature");
if (!IsReadable(pDeviceTemperature))
throw GENERIC_EXCEPTION("DeviceTemperature feature not available. Aborting.");
// Register the OnDeviceTemperatureChanged callback to the DeviceTemperature node
GenApi::CallbackHandleType hCallback =
GenApi::Register(pDeviceTemperature->GetNode(), OnDeviceTemperatureChanged);
std::cout << "OnDeviceTemperatureChanged registered to DeviceTemperature node." << std::endl << std::endl;
for (int i = 0; i < TEMPERATURE_READS; i++)
{
// Sleep for a bit..
std::this_thread::sleep_for(std::chrono::milliseconds(POLL_FREQ_MS));
std::cout << INDENT << "Polling temperature.." << std::endl;
// And then poll nodes of the map. At this point, all nodes with a polling time
// shorter than the elapsed time are updated and their callback executed, if any.
pDevice->GetNodeMap().Poll(POLL_FREQ_MS);
}
GenApi::Deregister(hCallback);
pDevice->Dispose();
pDevice = nullptr;
std::cout << "Device instance disposed." << std::endl;
pSystem->Dispose();
pSystem = nullptr;
std::cout << "System instance disposed." << std::endl;
}
int main(int /*argc*/, char** /*argv*/)
{
try
{
NodeMapPolling_Sample();
}
catch (GenICam::GenericException& e)
{
std::cout << e.what() << std::endl;
}
}