(C++) Tell if multiple keyboard buttons are pressed

[kompadre]

Hi, I needed this feature and the simplest way to do it I came up with is to something like

Code: Select all

class MyEventReceiver : public irr::IEventReceiver
{
	// To store if a key is down, I use this private array
	bool isDown[irr::KEY_KEY_CODES_COUNT];
public: 
	// To make sure the keys are initialized to false I do 
	MyEventReceiver() 
	{
		memset(isDown, 0, sizeof(isDown));
	}
	virtual bool OnEvent(SEvent event)
	{
		if (event.EventType == EET_KEY_INPUT_EVENT)
			isDown[event.KeyInput.Key] = event.KeyInput.PressedDown;

		/* the rest of input parsing ... */
		return false;	
	}
	/* One last thing is to take care of is that some key codes 
		mean multiple key codes (i think): e.g. KEY_CONTROL means 
		KEY_LCONTROL and KEY_RCONTROL (the code for this buttons is always the same for me, tho).
		This would mean that another method with some logic is needed.
		Something like : 
	*/
	bool keyIsDown(enum irr::EKEY_CODE notbb_code) {
		switch (notbb_code) {
			case KEY_CONTROL:
				return (isDown[KEY_CONTROL] || isDown[KEY_LCONTROL] || isDown[KEY_RCONTROL]);
			/* here would go shifts, alts ... */
			default: 
				return isDown[notbb_code];
		}
	}
};

[sudi]

take a look at the sevent class...it's already integrated to check if control is pressed down.