Application.cameraChanged Event

# Import fusion360utils folder, which includes event_utils.py.
from ...lib import fusion360utils as futil

# Global variable used to maintain a reference to all event handlers.
local_handlers = []

# "application_var" is a variable referencing an Application object.
# "application_cameraChanged" is the event handler function.
futil.add_handler(application_var.cameraChanged, application_cameraChanged, local_handlers=local_handlers)

# Event handler for the cameraChanged event.
def application_cameraChanged(args: adsk.core.CameraEventArgs):
    # Code to react to the event.
    app.log('In application_cameraChanged event handler.')

# Global variable used to maintain a reference to all event handlers.
handlers = []

# "application_var" is a variable referencing an Application object.
# "MyCameraChangedHandler" is the name of the class that handles the event.
onCameraChanged = MyCameraChangedHandler()
application_var.cameraChanged.add(onCameraChanged)
handlers.append(onCameraChanged)

# Event handler for the cameraChanged event.
class MyCameraChangedHandler(adsk.core.CameraEventHandler):
    def __init__(self):
        super().__init__()
    def notify(self, args: adsk.core.CameraEventArgs):
        # Code to react to the event.
        app.log('In MyCameraChangedHandler event handler.')

#include <Core/Application/Application.h>
#include <Core/Application/CameraEvent.h>
#include <Core/Application/CameraEventHandler.h>
#include <Core/Application/CameraEventArgs.h>

// Event handler for the cameraChanged event.
class MyCameraChangedEventHandler : public adsk::core::CameraEventHandler
{
public:
    void notify(const Ptr<CameraEventArgs>& eventArgs) override
    {
        // Code to react to the event.
        ui->messageBox("In MyCameraChangedEventHandler event handler.");
    }
} _cameraChanged;

// "application_var" is a variable referencing an Application object.
// Connect the handler function to the event.
Ptr<CameraEvent> cameraChangedEvent = application_var->cameraChanged();
if (!cameraChangedEvent)
    return;

bool isOk = cameraChangedEvent->add(&_cameraChanged);
if (!isOk)
    return;