exiting the program with ESC key?

[Valor]

Can someone please point me in the direction of putting in the code the option of exiting the program using the ESC key using Irrlicht api and without producing memory leaks.

[greenya]

Something like this:

Code: Select all

IrrlichtDevice* device = 0;

class MyEventReceiver : public IEventReceiver
{
public:
	...

	bool OnEvent(const SEvent& event)
	{
		if (event.EventType == irr::EET_KEY_INPUT_EVENT &&
			event.KeyInput.Key == irr::KEY_ESCAPE
			event.KeyInput.PressedDown)
		{
			device->closeDevice();
			return true;
		}
		...
	}

	...
}

void main()
{
	...

	device = createDevice();
	device->setEventReceiver(new MyEventReceiver());

	...

	while (device->run())
	{
		...
	}

	...
}

The main parts are:
- you check key irr::KEY_ESCAPE
- you call closeDevice()

[DtD]

Don't forget that you need to call device->run() after closing it in order for it to close correctly.

[serengeor]

Don't forget that you need to call device->run() after closing it in order for it to close correctly.

Is that true?
never seen that done in the tutorials

[greenya]

I don't know if it is necessary to call device->run() after device->closeDevice(), BUT i can say that after you called device->closeDevice() each call of device->run() will return false, so your ordinary "while (device->run()) { ... }" cycle will correctly exit. And the "plus" of device->closeDevice() is that you can call it from any place of you program.

[Acki]

Don't forget that you need to call device->run() after closing it in order for it to close correctly.

Is that true?

in general yes, but it's only realy neccessary if you want the program to be still running, eg. when you want to change driver, resolution, etc. and you break the main loop for this (otherwise see further explanation below )...

so your ordinary "while (device->run()) { ... }" cycle will correctly exit.

right, because you're still in the loop it will call device->run() a last time after the closeDevice() call, return false and exit, so no extra call is needed in this case...
(I know this is what you said, I just wanted to explain it with my words )

[Valor]

do you need to make device a global?

[greenya]

do you need to make device a global?

No. you can pass device to EventReceiver constructor and save it internally for example. Any way, you need to call device->closeDevice() in order to close device properly.

You also can send WM_CLOSE message to your window. So you do not need the device, but this is only for Windows.

[Valor]

Thanks!