/*==================================================== Handling direct input in a fullscreen application. Written by Hannu Kankaanpää Just cut/paste this code in your program and it works immediately :) (not a 100% guarantee) Note the Boolean bActive, that tells if your application is active. ======================================================*/ #include void WINAPI DI_Term(); //terminate dinput BOOL WINAPI DI_Init(HINSTANCE g_hinst, HWND g_hwndMain ); //init dinput HRESULT SetMouseAcquire(); //acquire/unacquire mouse LPDIRECTINPUT g_lpDI; //direct input object LPDIRECTINPUTDEVICE g_pKeyboard; //keyboard device LPDIRECTINPUTDEVICE g_pMouse; //mouse device HANDLE g_hevtMouse;// mouse event BOOL bActive; // is application active? #define KEYDOWN(key) (keybuffer[key] & 0x80) char keybuffer[256]; void readMouse(); void readKeyboard(); //================================================== //mouse struct //================================================== typedef struct { int x; //x-location of mouse int y; //y-location of mouse uchar button1; //is button 1 held down? uchar button2; //is button 2 held down? } MOUSE; MOUSE mouse; //================================================== //Put this at the end of your initialization function //================================================== { if (!DI_Init(hInstance, hwnd)) { //failure return FALSE; } } //================================================== //You must call this function all the time in //order to read keyboard and mouse input //================================================== void inputloop() { if (bActive) //is your program active? { //read mouse state readMouse(); //read keyboard state readKeyboard(); } /* //examples of keyboard usage: if (KEYDOWN(DIK_A)) dostuff(); //a-key is held down if (KEYDOWN(DIK_ESC)) dosomething(); //escape is held down if (KEYDOWN(DIK_UP)) thrustMyVehicle(); //up-arrow //examples of mouse usage: drawMouseCursor(mouse.x, mouse.y); if (mouse.button1) clickLeft(); //left mouse button is down if (mouse.button2) clickRight(); //right mouse button is down */ } //================================================== //Read keyboard state //================================================== void readKeyboard() { HRESULT hr; hr = g_pKeyboard->GetDeviceState(sizeof(keybuffer),(LPVOID)&keybuffer); if FAILED(hr) { if (hr==DIERR_INPUTLOST) { hr = g_pKeyboard->Acquire(); } return; } } //================================================== //Read mouse state //================================================== void readMouse() { DIDEVICEOBJECTDATA od; DWORD dwElements; HRESULT hr; // Attempt to read one data element. Continue as long as // device data is available. while (TRUE) { dwElements = 1; hr = g_pMouse->GetDeviceData(sizeof(DIDEVICEOBJECTDATA), &od, &dwElements, 0); //acquire if input device is lost if (hr == DIERR_INPUTLOST || hr==DIERR_NOTACQUIRED) { SetMouseAcquire(); return; } // Unable to read data or no data available -> exit function, we're done if ( FAILED(hr) || dwElements == 0) { return; } // look at the element to see what happened switch (od.dwOfs) { case DIMOFS_X: // Mouse horizontal motion mouse.x+=od.dwData; break; case DIMOFS_Y: // Mouse vertical motion mouse.y+=od.dwData; break; case DIMOFS_BUTTON0: // Left button pressed or released if ( od.dwData & 0x80 ) mouse.button1=TRUE; else mouse.button1=FALSE; break; case DIMOFS_BUTTON1: // Right button pressed or released if ( od.dwData & 0x80 ) mouse.button2=TRUE; else mouse.button2=FALSE; break; } } } //================================================== //You don't have to know what this function does =). //It's the init. //================================================== BOOL WINAPI DI_Init(HINSTANCE g_hinst, HWND g_hwndMain ) { HRESULT hr; // Create the DirectInput object. hr = DirectInputCreate(g_hinst, DIRECTINPUT_VERSION, &g_lpDI, NULL); if FAILED(hr) return FALSE; //================================================== //Keyboard init //================================================== { // Retrieve a pointer to an IDirectInputDevice interface hr = g_lpDI->CreateDevice(GUID_SysKeyboard, &g_pKeyboard, NULL); if FAILED(hr) { DI_Term();return FALSE; } // Now that you have an IDirectInputDevice interface, get // it ready to use. // Set the data format using the predefined keyboard data // format provided by the DirectInput object for keyboards. hr = g_pKeyboard->SetDataFormat(&c_dfDIKeyboard); if FAILED(hr) { DI_Term();return FALSE; } // Set the cooperative level hr = g_pKeyboard->SetCooperativeLevel(g_hwndMain, DISCL_FOREGROUND | DISCL_NONEXCLUSIVE); if FAILED(hr) { DI_Term();return FALSE; } // Get access to the input device. hr = g_pKeyboard->Acquire(); if FAILED(hr) { DI_Term();return FALSE; } } //================================================== //Mouse init //================================================== { // Obtain an interface to the system mouse device. hr = g_lpDI->CreateDevice( GUID_SysMouse, &g_pMouse, NULL ); if FAILED(hr) { return FALSE; } // Set the data format to "mouse format" - a predefined data format // // A data format specifies which controls on a device we // are interested in, and how they should be reported. // // This tells DirectInput that we will be passing a // DIMOUSESTATE structure to IDirectInputDevice::GetDeviceState. hr = g_pMouse->SetDataFormat( &c_dfDIMouse ); if FAILED(hr) { return FALSE; } // Set the cooperativity level to let DirectInput know how // this device should interact with the system and with other // DirectInput applications. hr = g_pMouse->SetCooperativeLevel( g_hwndMain, DISCL_EXCLUSIVE | DISCL_FOREGROUND); if FAILED(hr) { return FALSE; } // create a win32 event which is signaled when mouse data is availible g_hevtMouse = CreateEvent( NULL, FALSE, FALSE, NULL ); if ( NULL == g_hevtMouse ) return FALSE; // give the event to the mouse device hr = g_pMouse->SetEventNotification( g_hevtMouse ); if FAILED(hr) { return FALSE; } // setup the buffer size for the mouse data DIPROPDWORD dipdw; dipdw.diph.dwSize = sizeof(DIPROPDWORD); dipdw.diph.dwHeaderSize = sizeof(DIPROPHEADER); dipdw.diph.dwObj = 0; dipdw.diph.dwHow = DIPH_DEVICE; dipdw.dwData = 16; hr = g_pMouse->SetProperty( DIPROP_BUFFERSIZE, &dipdw.diph ); if FAILED(hr) { return FALSE; } } //success return TRUE; } //================================================== //this is for mouse acquiring.. if application is //not active, you unacquire the mouse until the //application comes active again //================================================== HRESULT SetMouseAcquire() { // nothing to do if g_pMouse is NULL if (NULL == g_pMouse) return FALSE; if (bActive) { g_pMouse->Acquire(); } else { g_pMouse->Unacquire(); } return TRUE; } //================================================== //Call this function when your program stops //================================================== void WINAPI DI_Term() { if (g_lpDI) { if (g_pMouse) { // Unacquire the device one last time just in case // the app tried to exit while the device is still acquired. g_pMouse->Unacquire(); g_pMouse->Release(); g_pMouse = NULL; } if (g_pKeyboard) { //Always unacquire the device before calling Release(). g_pKeyboard->Unacquire(); g_pKeyboard->Release(); g_pKeyboard = NULL; } g_lpDI->Release(); g_lpDI = NULL; if (g_hevtMouse) { CloseHandle( g_hevtMouse ); g_hevtMouse = NULL; } } }