Command.inputChanged 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 = []

# "command_var" is a variable referencing a Command object.
# "command_inputChanged" is the event handler function.
futil.add_handler(command_var.inputChanged, command_inputChanged, local_handlers=local_handlers)

# Event handler for the inputChanged event.
def command_inputChanged(args: adsk.core.InputChangedEventArgs):
    # Code to react to the event.
    app.log('In command_inputChanged event handler.')

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

# "command_var" is a variable referencing a Command object.
# "MyInputChangedHandler" is the name of the class that handles the event.
onInputChanged = MyInputChangedHandler()
command_var.inputChanged.add(onInputChanged)
handlers.append(onInputChanged)

# Event handler for the inputChanged event.
class MyInputChangedHandler(adsk.core.InputChangedEventHandler):
    def __init__(self):
        super().__init__()
    def notify(self, args: adsk.core.InputChangedEventArgs):
        # Code to react to the event.
        app.log('In MyInputChangedHandler event handler.')

#include <Core/UserInterface/Command.h>
#include <Core/UserInterface/InputChangedEvent.h>
#include <Core/UserInterface/InputChangedEventHandler.h>
#include <Core/UserInterface/InputChangedEventArgs.h>

// Event handler for the inputChanged event.
class MyInputChangedEventHandler : public adsk::core::InputChangedEventHandler
{
public:
    void notify(const Ptr<InputChangedEventArgs>& eventArgs) override
    {
        // Code to react to the event.
        ui->messageBox("In MyInputChangedEventHandler event handler.");
    }
} _inputChanged;

// "command_var" is a variable referencing a Command object.
// Connect the handler function to the event.
Ptr<InputChangedEvent> inputChangedEvent = command_var->inputChanged();
if (!inputChangedEvent)
    return;

bool isOk = inputChangedEvent->add(&_inputChanged);
if (!isOk)
    return;