Command.keyDown 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_keyDown" is the event handler function.
futil.add_handler(command_var.keyDown, command_keyDown, local_handlers=local_handlers)

# Event handler for the keyDown event.
def command_keyDown(args: adsk.core.KeyboardEventArgs):
    # Code to react to the event.
    app.log('In command_keyDown event handler.')

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

# "command_var" is a variable referencing a Command object.
# "MyKeyDownHandler" is the name of the class that handles the event.
onKeyDown = MyKeyDownHandler()
command_var.keyDown.add(onKeyDown)
handlers.append(onKeyDown)

# Event handler for the keyDown event.
class MyKeyDownHandler(adsk.core.KeyboardEventHandler):
    def __init__(self):
        super().__init__()
    def notify(self, args: adsk.core.KeyboardEventArgs):
        # Code to react to the event.
        app.log('In MyKeyDownHandler event handler.')

#include <Core/UserInterface/Command.h>
#include <Core/UserInterface/KeyboardEvent.h>
#include <Core/UserInterface/KeyboardEventHandler.h>
#include <Core/UserInterface/KeyboardEventArgs.h>

// Event handler for the keyDown event.
class MyKeyDownEventHandler : public adsk::core::KeyboardEventHandler
{
public:
    void notify(const Ptr<KeyboardEventArgs>& eventArgs) override
    {
        // Code to react to the event.
        ui->messageBox("In MyKeyDownEventHandler event handler.");
    }
} _keyDown;

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

bool isOk = keyDownEvent->add(&_keyDown);
if (!isOk)
    return;