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Simple problem with key pressed event
Posted: Tue Jan 05, 2010 8:52 pm
by L o
Hi,
I have a problem catching the key pressed event. My code:
Code: Select all
class GameplayReceiver : public IEventReceiver
{
//...
bool OnEvent(const SEvent& event)
{
if(event.EventType == irr::EET_KEY_INPUT_EVENT)
{
if(event.KeyInput.PressedDown && event.KeyInput.Key == KEY_KEY_A)
puts("A PRESSED DOWN");
if(!event.KeyInput.PressedDown && event.KeyInput.Key == KEY_KEY_A)
puts("A RELEASED");
}
}
};
If the user keeps pushing the key down, I would expect the message "A PRESSED DOWN" to appear once, and then, nothing should come until the A key is relesed.
Instead, I get:
A PRESSED DOWN
A RELEASED
A PRESSED DOWN
A RELEASED
...
until I release the key. Is this really wanted or is it a bug I made?
Greets,
Lo
Posted: Tue Jan 05, 2010 10:56 pm
by CuteAlien
Key-repeat is actually wanted. But I suppose this could still be improved some day by adding either a parameter to suppress repeat events or maybe add another flag to the events to mark them as repeats. You can add that to the
feature-wish-tracker if you want. I guess it would be useful.
Posted: Tue Jan 05, 2010 11:36 pm
by Bate
yeah I would love that too
here's what I do to make sure a key press is triggered only once, but that way it triggers when you release the key not when you press it.
Code: Select all
bool CEvents::OnKeyInputEvent(const irr::SEvent &e)
{
if (!e.KeyInput.PressedDown)
{
switch (e.KeyInput.Key)
{
case KEY_SPACE :
{
// do something
} break;
case KEY_ESCAPE :
{
device->closeDevice();
} break;
}
}
keys[e.KeyInput.Key] = e.KeyInput.PressedDown;
return false;
}
Posted: Wed Jan 06, 2010 12:14 am
by Mircea Popescu
I think you can supress the typematic rate of windows inside your application, I don't recall the exact setting tho.
Posted: Wed Jan 06, 2010 12:00 pm
by bitplane
I thought you're supposed to see:
Code: Select all
A PRESSED DOWN
A PRESSED DOWN
A PRESSED DOWN
...
A RELEASED
In this case you can detect the repeats if you want to (ie, for text input in your GUI) but also ignore multiple pressed down events if you're controlling a character.
So I could be wrong, but this may be a bug.
Posted: Wed Jan 06, 2010 8:38 pm
by CuteAlien
bitplane wrote:I thought you're supposed to see:
Code: Select all
A PRESSED DOWN
A PRESSED DOWN
A PRESSED DOWN
...
A RELEASED
In this case you can detect the repeats if you want to (ie, for text input in your GUI) but also ignore multiple pressed down events if you're controlling a character.
So I could be wrong, but this may be a bug.
Yes, you are right. At least on Linux that's what you get - should be the same on Windows.