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Added multi-touch support for Windows
This commit is contained in:
Mario Liebisch
parent
0e16627677
commit
d5ac834bae
@ -27,6 +27,7 @@
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////////////////////////////////////////////////////////////
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#include <SFML/System/Win32/WindowsHeader.hpp>
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#include <SFML/Window/Win32/InputImpl.hpp>
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#include <SFML/Window/Win32/WindowImplWin32.hpp>
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#include <SFML/Window/Window.hpp>
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@ -236,26 +237,34 @@ void InputImpl::setMousePosition(const Vector2i& position, const WindowBase& rel
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////////////////////////////////////////////////////////////
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bool InputImpl::isTouchDown(unsigned int /*finger*/)
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bool InputImpl::isTouchDown(unsigned int finger)
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{
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// Not applicable
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return false;
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return WindowImplWin32::isTouchDown(finger);
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}
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////////////////////////////////////////////////////////////
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Vector2i InputImpl::getTouchPosition(unsigned int /*finger*/)
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Vector2i InputImpl::getTouchPosition(unsigned int finger)
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{
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// Not applicable
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return Vector2i();
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return WindowImplWin32::getTouchPosition(finger);
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}
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////////////////////////////////////////////////////////////
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Vector2i InputImpl::getTouchPosition(unsigned int /*finger*/, const WindowBase& /*relativeTo*/)
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Vector2i InputImpl::getTouchPosition(unsigned int finger, const WindowBase& relativeTo)
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{
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// Not applicable
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return Vector2i();
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WindowHandle handle = relativeTo.getSystemHandle();
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Vector2i pos;
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if (handle && WindowImplWin32::isTouchDown(finger))
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{
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pos = WindowImplWin32::getTouchPosition(finger);
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POINT point = { pos.x, pos.y };
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ScreenToClient(handle, &point);
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pos.x = point.x;
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pos.y = point.y;
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}
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return pos;
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}
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} // namespace priv
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@ -60,6 +60,92 @@ unsigned int windowCount = 0; // Windows owned by SFML
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unsigned int handleCount = 0; // All window handles
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const wchar_t* className = L"SFML_Window";
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sf::priv::WindowImplWin32* fullscreenWindow = nullptr;
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HINSTANCE user32Dll = nullptr;
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DWORD touchIDs[10];
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POINT touches[10];
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#if WINVER < 0x0601
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// Define touch API that's available for more recent versions of Windows
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#define WM_TOUCH 0x0240
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DECLARE_HANDLE(HTOUCHINPUT);
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typedef struct tagTOUCHINPUT
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{
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LONG x;
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LONG y;
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HANDLE hSource;
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DWORD dwID;
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DWORD dwFlags;
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DWORD dwMask;
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DWORD dwTime;
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ULONG_PTR dwExtraInfo;
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DWORD cxContact;
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DWORD cyContact;
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} TOUCHINPUT, *PTOUCHINPUT;
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typedef TOUCHINPUT const * PCTOUCHINPUT;
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#define TOUCH_COORD_TO_PIXEL(l) ((l) / 100)
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#define TOUCHEVENTF_MOVE 0x0001
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#define TOUCHEVENTF_DOWN 0x0002
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#define TOUCHEVENTF_UP 0x0004
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#define TOUCHEVENTF_INRANGE 0x0008
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#define TOUCHEVENTF_PRIMARY 0x0010
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#define TOUCHEVENTF_NOCOALESCE 0x0020
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#define TOUCHEVENTF_PEN 0x0040
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#define TOUCHEVENTF_PALM 0x0080
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typedef BOOL(WINAPI* RegisterTouchWindowFuncType)(HWND, ULONG);
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typedef BOOL(WINAPI* CloseTouchInputHandleFuncType)(HTOUCHINPUT);
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typedef BOOL(WINAPI* GetTouchInputInfoFuncType)(HTOUCHINPUT, UINT, PTOUCHINPUT, int);
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RegisterTouchWindowFuncType RegisterTouchWindow = nullptr;
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CloseTouchInputHandleFuncType CloseTouchInputHandle = nullptr;
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GetTouchInputInfoFuncType GetTouchInputInfo = nullptr;
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bool touchEnabled = false;
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#else
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static const bool touchEnabled = true;
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#endif
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// Convert a hardware dependent ID to a 0 based index we can use
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int getTouchID(DWORD id)
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{
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for (int i = 0; i < 10; ++i)
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{
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if (touchIDs[i] == id)
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return i;
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}
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for (int i = 0; i < 10; ++i)
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{
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if (touchIDs[i] == -1)
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{
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touchIDs[i] = id;
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return i;
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}
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}
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return -1;
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}
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// Get a system error string from an error code
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std::string getErrorString(DWORD error)
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{
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PTCHAR buffer;
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if (FormatMessage(FORMAT_MESSAGE_MAX_WIDTH_MASK | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
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nullptr,
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error,
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0,
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reinterpret_cast<PTCHAR>(&buffer),
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0,
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nullptr) == 0)
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return "Unknown error.";
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sf::String message = buffer;
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LocalFree(buffer);
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return message.toAnsiString();
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}
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const GUID GUID_DEVINTERFACE_HID = {0x4d1e55b2, 0xf16f, 0x11cf, {0x88, 0xcb, 0x00, 0x11, 0x11, 0x00, 0x00, 0x30}};
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@ -100,10 +186,6 @@ void setProcessDpiAware()
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FreeLibrary(shCoreDll);
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}
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// Fall back to SetProcessDPIAware if SetProcessDpiAwareness
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// is not available on this system
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HINSTANCE user32Dll = LoadLibrary(L"user32.dll");
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if (user32Dll)
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{
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using SetProcessDPIAwareFuncType = BOOL(WINAPI*)();
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@ -115,8 +197,6 @@ void setProcessDpiAware()
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if (!SetProcessDPIAwareFunc())
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sf::err() << "Failed to set process DPI awareness" << std::endl;
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}
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FreeLibrary(user32Dll);
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}
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}
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} // namespace
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@ -140,8 +220,16 @@ m_mouseInside(false),
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m_fullscreen(false),
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m_cursorGrabbed(false)
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{
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// If we're the first window handle
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if (handleCount == 0)
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{
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// Ensure User32.dll is loaded
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if (!user32Dll)
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user32Dll = LoadLibraryA("User32.dll");
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// Set that this process is DPI aware and can handle DPI scaling
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setProcessDpiAware();
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}
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if (m_handle)
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{
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@ -154,6 +242,9 @@ m_cursorGrabbed(false)
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// We change the event procedure of the control (it is important to save the old one)
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SetWindowLongPtrW(m_handle, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(this));
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m_callback = SetWindowLongPtrW(m_handle, GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(&WindowImplWin32::globalOnEvent));
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// Try to prepare touch events, if necessary
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prepareTouch();
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}
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}
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@ -173,8 +264,16 @@ m_mouseInside(false),
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m_fullscreen((style & Style::Fullscreen) != 0),
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m_cursorGrabbed(m_fullscreen)
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{
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// If we're the first window handle
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if (handleCount == 0)
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{
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// Ensure User32.dll is loaded
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if (!user32Dll)
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user32Dll = LoadLibraryA("User32.dll");
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// Set that this process is DPI aware and can handle DPI scaling
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setProcessDpiAware();
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}
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// Register the window class at first call
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if (windowCount == 0)
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@ -248,6 +347,9 @@ m_cursorGrabbed(m_fullscreen)
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if (m_fullscreen)
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switchToFullscreen(mode);
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// Try to prepare touch events, if necessary
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prepareTouch();
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// Increment window count
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++windowCount;
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}
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@ -267,9 +369,19 @@ WindowImplWin32::~WindowImplWin32()
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{
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--handleCount;
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// This was the last handle
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if (handleCount == 0)
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{
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// Free User32.dll
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if (user32Dll)
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{
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FreeLibrary(user32Dll);
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user32Dll = nullptr;
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}
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// Reenable automatic joystick polling
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JoystickImpl::setLazyUpdates(false);
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}
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}
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if (!m_callback)
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{
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@ -1011,6 +1123,73 @@ void WindowImplWin32::processEvent(UINT message, WPARAM wParam, LPARAM lParam)
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break;
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}
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case WM_TOUCH:
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{
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// Get the number of events
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std::int16_t num = LOWORD(wParam);
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// Reserve memory
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PTOUCHINPUT events = new TOUCHINPUT[num];
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if (events)
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{
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if (GetTouchInputInfo(reinterpret_cast<HTOUCHINPUT>(lParam), num, events, sizeof(TOUCHINPUT)))
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{
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POINT point;
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for (int i = 0; i < num; ++i)
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{
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Event event;
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int index = getTouchID(events[i].dwID);
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// Out of Ids? Should never happen
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if (index == -1)
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continue;
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event.touch.finger = static_cast<unsigned int>(index);
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point.x = TOUCH_COORD_TO_PIXEL(events[i].x);
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point.y = TOUCH_COORD_TO_PIXEL(events[i].y);
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POINT cpoint = point;
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ScreenToClient(m_handle, &cpoint);
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event.touch.x = cpoint.x;
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event.touch.y = cpoint.y;
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if (events[i].dwFlags & TOUCHEVENTF_DOWN)
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{
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event.type = Event::TouchBegan;
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pushEvent(event);
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// Prevent initial move event
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touches[index] = point;
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}
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if (events[i].dwFlags & TOUCHEVENTF_UP)
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{
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event.type = Event::TouchEnded;
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pushEvent(event);
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// Remove the stored ID
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touchIDs[index] = static_cast<DWORD>(-1);
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}
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if (events[i].dwFlags & TOUCHEVENTF_MOVE) {
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// Only handle real movement
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if (touches[index].x != point.x || touches[index].y != point.y)
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{
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touches[index] = point;
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event.type = Event::TouchMoved;
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pushEvent(event);
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}
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}
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}
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CloseTouchInputHandle(reinterpret_cast<HTOUCHINPUT>(lParam));
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}
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else
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{
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err() << "Failed to get touch input info: " << getErrorString(GetLastError()) << std::endl;
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}
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delete[] events;
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}
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break;
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}
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}
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}
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@ -1174,6 +1353,48 @@ LRESULT CALLBACK WindowImplWin32::globalOnEvent(HWND handle, UINT message, WPARA
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return DefWindowProcW(handle, message, wParam, lParam);
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}
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////////////////////////////////////////////////////////////
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void WindowImplWin32::prepareTouch()
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{
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static bool prepared = false;
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if (!prepared)
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{
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prepared = true;
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#if WINVER < 0x0601
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RegisterTouchWindow = reinterpret_cast<RegisterTouchWindowFuncType>(GetProcAddress(user32Dll, "RegisterTouchWindow"));
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touchEnabled = RegisterTouchWindow != nullptr;
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// If we've got touch support, load the other procs
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if (touchEnabled)
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{
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CloseTouchInputHandle = reinterpret_cast<CloseTouchInputHandleFuncType>(GetProcAddress(user32Dll, "CloseTouchInputHandle"));
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GetTouchInputInfo = reinterpret_cast<GetTouchInputInfoFuncType>(GetProcAddress(user32Dll, "GetTouchInputInfo"));
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// Reset touch IDs
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for (int i = 0; i < 10; ++i)
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touchIDs[i] = static_cast<DWORD>(-1);
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}
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#endif
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}
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if (touchEnabled && m_handle)
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RegisterTouchWindow(m_handle, 0);
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}
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////////////////////////////////////////////////////////////
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bool WindowImplWin32::isTouchDown(unsigned int finger)
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{
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return touchIDs[finger] != static_cast<DWORD>(-1);
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}
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////////////////////////////////////////////////////////////
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Vector2i WindowImplWin32::getTouchPosition(unsigned int finger)
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{
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return Vector2i(touches[finger].x, touches[finger].y);
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}
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} // namespace priv
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} // namespace sf
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@ -183,6 +183,26 @@ public:
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////////////////////////////////////////////////////////////
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bool hasFocus() const override;
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////////////////////////////////////////////////////////////
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/// \brief Get global touch state for a finger
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///
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/// \param finger Finger index
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///
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/// \return True, if the finger is active
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///
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////////////////////////////////////////////////////////////
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static bool isTouchDown(unsigned int finger);
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////////////////////////////////////////////////////////////
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/// \brief Get global touch coordinates for a finger
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///
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/// \param finger Finger index
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///
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/// \return Touch position
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///
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////////////////////////////////////////////////////////////
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static Vector2i getTouchPosition(unsigned int finger);
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protected:
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////////////////////////////////////////////////////////////
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/// \brief Process incoming events from the operating system
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@ -266,6 +286,12 @@ private:
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////////////////////////////////////////////////////////////
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static LRESULT CALLBACK globalOnEvent(HWND handle, UINT message, WPARAM wParam, LPARAM lParam);
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////////////////////////////////////////////////////////////
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/// \brief Helper function to prepare and enable touch handling
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///
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////////////////////////////////////////////////////////////
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void prepareTouch();
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////////////////////////////////////////////////////////////
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// Member data
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////////////////////////////////////////////////////////////
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