dxinput.cpp

实战粒子系统例程

/*
	dxinput.cpp - Input device handle
	Copyright (c) HalfLucifer, 2001.7.20
*/
#include "dxinput.h"

DXinput::~DXinput()
{
	if (lpDI != NULL)
	{
		if (lpDIKeyboard != NULL)
		{
			lpDIKeyboard->Unacquire();
			lpDIKeyboard->Release();
			lpDIKeyboard = NULL;
		}
		lpDI->Release();
		lpDI = NULL;
	}
}

bool DXinput::Initialize(void)
{
	HRESULT hr;

	hr = (DirectInput8Create(hInstance, DIRECTINPUT_VERSION,			// Create the main DirectInput object
		  IID_IDirectInput8, (void**)&lpDI, NULL));
	if (FAILED(hr))
	{
		MessageBox(NULL, "Could not create main DInput object", "ERROR", MB_OK);
		return false;
	}

	hr = (lpDI->CreateDevice(GUID_SysKeyboard, &lpDIKeyboard, NULL));	// Create the keyboard's device object
	if (FAILED(hr))
	{
		MessageBox(NULL, "Could not create keyboard's object", "ERROR", MB_OK);
		DXinput::~DXinput();
		return false;
	}

	hr = (lpDIKeyboard->SetDataFormat(&c_dfDIKeyboard));				// Set the keyboard's data format
	if (FAILED(hr))
	{
		MessageBox(NULL, "Could not set keyboard's data format", "ERROR", MB_OK);
		DXinput::~DXinput();
		return false;
	}

	hr = (lpDIKeyboard->SetCooperativeLevel(hWnd, DISCL_BACKGROUND | DISCL_NONEXCLUSIVE));	// Set the keyboard's cooperation level
	if (FAILED(hr))
	{
		MessageBox(NULL, "Could not set keyboard's cooperation level", "ERROR", MB_OK);
		DXinput::~DXinput();
		return false;
	}

	lpDIKeyboard->Acquire();					// Acquire the keyboard for use

	return true;
}

void DXinput::Update(void)
{
	HRESULT hr;
	
	hr = (lpDIKeyboard->GetDeviceState(sizeof(unsigned char[256]), (LPVOID)&KeyBuffer));	// Check if keyboard still aquired
    if (FAILED(hr))
	{
        if (hr == DIERR_INPUTLOST)
		{
			hr = (lpDIKeyboard->Acquire());		// Try to re-acquire the keyboard
			if (FAILED(hr))
			{
				MessageBox(NULL, "Keyboard has been lost", "ERROR", MB_OK);
				DXinput::~DXinput();
			}
		}
	}
}