/* A device has been opened. Update the control. */
private void DeviceOpenedEventHandler()
{
if (InvokeRequired)
{
/* If called from a different thread, we must use the Invoke method to marshal the call to the proper thread. */
BeginInvoke(new ImageProvider.DeviceOpenedEventHandler(DeviceOpenedEventHandler));
return;
}
try
{
/* Get the node. */
m_hNode = m_imageProvider.GetNodeFromDevice(name);
/* Register for changes. */
m_hCallbackHandle = GenApi.NodeRegisterCallback(m_hNode, m_nodeCallbackHandler);
/* Update the displayed name. */
labelName.Text = GenApi.NodeGetDisplayName(m_hNode) + ":";
/* Update the control values. */
UpdateValues();
}
catch
{
/* If errors occurred disable the control. */
Reset();
}
}
/* A device has been opened. Update the control. */
private void DeviceOpenedEventHandler()
{
if (InvokeRequired)
{
/* If called from a different thread, we must use the Invoke method to marshal the call to the proper thread. */
BeginInvoke(new ImageProvider.DeviceOpenedEventHandler(DeviceOpenedEventHandler));
return;
}
try
{
/* Get the node. */
m_hNode = m_imageProvider.GetNodeFromDevice(name);
/* Features, like 'Gain', are named according to the GenICam Standard Feature Naming Convention (SFNC).
* The SFNC defines a common set of features, their behavior, and the related parameter names.
* This ensures the interoperability of cameras from different camera vendors.
*
* Some cameras, e.g. cameras compliant to the USB3 Vision standard, use a later SFNC version than
* previous Basler GigE and Firewire cameras. Accordingly, the behavior of these cameras and
* some parameters names will be different.
*/
if (!m_hNode.IsValid && /* No node has been found using the provided name. */
(name == "GainRaw" || name == "ExposureTimeRaw")) /* This means probably that the camera is compliant to a later SFNC version. */
{
/* Check to see if a compatible node exists. The SFNC 2.0, implemented by Basler USB Cameras for instance, defines Gain
* and ExposureTime as features of type Float.*/
if (name == "GainRaw")
{
m_hNode = m_imageProvider.GetNodeFromDevice("Gain");
}
else if (name == "ExposureTimeRaw")
{
m_hNode = m_imageProvider.GetNodeFromDevice("ExposureTime");
}
/* Update the displayed name. */
labelName.Text = GenApi.NodeGetDisplayName(m_hNode) + ":";
/* The underlying integer representation of Gain and ExposureTime can be accessed using
* the so called alias node. The alias is another representation of the original parameter.
*
* Since this slider control can only be used with Integer nodes we have to use
* the alias node here to display and modify Gain and ExposureTime.
*/
m_hNode = GenApi.NodeGetAlias(m_hNode);
/* Register for changes. */
m_hCallbackHandle = GenApi.NodeRegisterCallback(m_hNode, m_nodeCallbackHandler);
}
else
{
/* Update the displayed name. */
labelName.Text = GenApi.NodeGetDisplayName(m_hNode) + ":";
/* Register for changes. */
m_hCallbackHandle = GenApi.NodeRegisterCallback(m_hNode, m_nodeCallbackHandler);
}
/* Update the control values. */
UpdateValues();
}
catch
{
/* If errors occurred disable the control. */
Reset();
}
}