[SOLVED] Keyboard events in SOFA

[jjcasmar]

Hello,

I’m trying to use the event handler to change some parameters of my componentes when some key is pressed, but the handleEvent method is not receiving any keypressed event.

Here is my code

template<class DataTypes>
void LinearISOElasticityFEMAD<DataTypes>::handleEvent(sofa::core::objectmodel::Event *event)
{
    // Key pressed event
    sofa::core::objectmodel::KeypressedEvent *ev = dynamic_cast<sofa::core::objectmodel::KeypressedEvent*>(event);
    std::cout << event->getClassName() << std::endl;
    if(ev != NULL)
    {
        std::cout << "Keyboard event" << std::endl;
        switch(ev->getKey())
        {
        // The key E is pressed
        case 'e':
            //Something should happened here
        default:
            break;
        }
    }
}

The problem is that I’m never entering in the if statement. The print output says that I’m receiving this events

AnimateBeginEvent
CollisionBeginEvent
CollisionEndEvent
IntegrateBeginEvent
Optimizer solver
IntegrateEndEvent
AnimateEndEvent
UpdateMappingEndEvent
MouseEventnt

Any idea to get keyboard events?

[Rosalie]

Hi jjcasmar,

Did you press the control key when you were trying to catch the letters?

Rosalie

[jjcasmar]

uhhh, no… should I?

[Carrez]

Hi jjcasmar,

In fact the keyboard events are emitted by the viewer, when Ctrl is pressed (or Cmd on macs).
So, the viewer must have the focus (just click on the viewport once to be sure) ans you must press Ctrl+ (or Cmd+,key> on a mac) and it should work.

Bruno

[Hugo]

Hi all,

Just to add a small detail, you need to set the variable “f_listening” to true. This variable is common to all BaseObject. If true, this variable will allow the call of the handleEvent function in your component.

• either in your code: set “f_listening->setValue(true);” (hard-coded, then your component is always listening)
• or in the scene where your component is loaded : “< mycomponent listening="1" / >”

Hope this helps.

Hugo

[Hugo]

Hi JuanJo,

I think we answered your question about this point.
If you have any further questions or issues do not hesitate to create a new thread.

Best,

Hugo

[Author]

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