Книга: DirectX 8 Programming Tutorial

Setting up the mouse

As with the keyboard, we need to set up the mouse before we can get access to it. Below is the code required, take a look and you'll notice that it is very similar to the keyboard set up code above.

//MOUSE =======================================================================
//Create the mouse device object
if (FAILED(m_pDirectInput->CreateDevice(GUID_SysMouse, &m_pMouse, NULL))) {
 CleanUpDirectInput();
 LogError("<li>Unable to create DirectInput mouse device interface.");
 return false;
} else {
 LogInfo("<li>DirectInput mouse device interface created OK.");
}
//Set the data format for the mouse
if (FAILED(m_pMouse->SetDataFormat(&c_dfDIMouse))) {
 CleanUpDirectInput();
 LogError("<li>Unable to set the mouse data format.");
 return false;
} else {
 LogInfo("<li>Set the mouse data format OK.");
}
//Set the cooperative level for the mouse
if (FAILED(m_pMouse->SetCooperativeLevel(hWnd, DISCL_FOREGROUND | DISCL_NONEXCLUSIVE))) {
 CleanUpDirectInput();
 LogError("<li>Unable to set the mouse cooperative level.");
 return false;
} else {
 LogInfo("<li>Set the mouse cooperative level OK.");
}
//Acquire the mouse
if (m_pMouse) {
 m_pMouse->Acquire();
}

So, for the mouse we have the same basic steps as for the keyboard. One of the differences is that we pass in the predefined GUID for the system mouse (GUID_SysMouse) into the CreateDevice method instead of the one for the keyboard which will return a pointer to the mouse. Another difference is that we need to use a different data format, c_dfDIMouse instead of c_dfDIKeyboard. We then set the cooperation level as before and finally acquire the mouse. We are now ready to get data from the keyboard and mouse.

Оглавление книги