Feature/integrated touchserver (#1015)

* WINDOWS: Touch server integrated into module

The touch server functionality has been integrated into the touch module
which is enabled by-default when the touch module is used on a windows
build.
The touch-hook checks for a connected digitizer (pen or touchscreen, but
I haven't tested pen)

This commit should also fix two potential low-risk race conditions in
the tuioear.cpp file.

* Added comment regarding which window we use

* Added copyright notice on the win32_touch files

Also changed from #pragma to #ifndef

* Fixes based on review

- Added anonymous namespace
- Put win32hook in openspace namespace
- Fixed indentations and linebreaks
- Fixed an issue regarding global state deinitialization

modules/touch/src/tuioear.cpp

@@ -115,10 +115,12 @@ void TuioEar::removeTuioBlob(TuioBlob*) { }
 void TuioEar::refresh(TuioTime) { } // about every 15ms
 
 std::vector<TuioCursor> TuioEar::getInput() {
+    std::lock_guard lock(_mx);
     return _list;
 }
 
 bool TuioEar::tap() {
+    std::lock_guard lock(_mx);
     if (_tap) {
         _tap = false;
         return !_tap;
@@ -129,7 +131,7 @@ bool TuioEar::tap() {
 }
 
 TuioCursor TuioEar::getTap() {
-    std::lock_guard<std::mutex> lock(_mx);
+    std::lock_guard lock(_mx);
     return _tapCo;
 }
 
@@ -157,9 +159,9 @@ void TuioEar::clearInput() {
 }
 
 // Standard UDP IP connection to port 3333
-TuioEar::TuioEar() {
-    _oscReceiver = new UdpReceiver(3333);
-    _tuioClient = new TuioClient(_oscReceiver);
-    _tuioClient->addTuioListener(this);
-    _tuioClient->connect();
+TuioEar::TuioEar()
+    : _tuioClient(3333)
+{
+    _tuioClient.addTuioListener(this);
+    _tuioClient.connect();
 }

modules/touch/src/win32_touch.cpp

@@ -0,0 +1,166 @@
+/*****************************************************************************************
+ *                                                                                       *
+ * OpenSpace                                                                             *
+ *                                                                                       *
+ * Copyright (c) 2014-2019                                                               *
+ *                                                                                       *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
+ * software and associated documentation files (the "Software"), to deal in the Software *
+ * without restriction, including without limitation the rights to use, copy, modify,    *
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to    *
+ * permit persons to whom the Software is furnished to do so, subject to the following   *
+ * conditions:                                                                           *
+ *                                                                                       *
+ * The above copyright notice and this permission notice shall be included in all copies *
+ * or substantial portions of the Software.                                              *
+ *                                                                                       *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
+ * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  *
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE  *
+ * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
+ ****************************************************************************************/
+
+#ifdef WIN32
+
+#include <modules/touch/include/win32_touch.h>
+
+#include <openspace/engine/openspaceengine.h>
+#include <openspace/engine/windowdelegate.h>
+
+#include <ghoul/logging/logmanager.h>
+
+#include <TUIO/TuioServer.h>
+
+#include <tchar.h>
+#include <tpcshrd.h>
+
+namespace {
+    constexpr const char* _loggerCat = "win32_touch";
+    HHOOK gTouchHook{ nullptr };
+    bool gStarted{ false };
+    TUIO::TuioServer* gTuioServer{ nullptr };
+    std::unordered_map<UINT, TUIO::TuioCursor*> gCursorMap;
+}
+
+namespace openspace {
+
+// This hook will only work for Win7+ Digitizers.
+// - Once GLFW has native touch support, we can remove this windows-specific code
+LRESULT CALLBACK HookCallback(int nCode, WPARAM wParam, LPARAM lParam) {
+    if (nCode < 0) {
+        return CallNextHookEx(0, nCode, wParam, lParam);
+    }
+    if (nCode == HC_ACTION) {
+        LPMSG pStruct = reinterpret_cast<LPMSG>(lParam);
+        const UINT message = pStruct->message;
+        switch (message) {
+            case WM_POINTERDOWN:
+            case WM_POINTERUPDATE:
+            case WM_POINTERUP:
+            {
+                POINTER_INFO pointerInfo = {};
+                if (GetPointerInfo(GET_POINTERID_WPARAM(pStruct->wParam), &pointerInfo)) {
+                    RECT rect;
+                    GetClientRect(pStruct->hwnd, reinterpret_cast<LPRECT>(&rect));
+
+                    POINT p = pointerInfo.ptPixelLocation;
+                    // native touch to screen conversion
+                    ScreenToClient(pStruct->hwnd, reinterpret_cast<LPPOINT>(&p));
+
+                    float xPos = (float)p.x / (float)(rect.right - rect.left);
+                    float yPos = (float)p.y / (float)(rect.bottom - rect.top);
+                    if (pointerInfo.pointerFlags & POINTER_FLAG_DOWN) {
+                        // Handle new touchpoint
+                        gTuioServer->initFrame(TUIO::TuioTime::getSessionTime());
+                        gCursorMap[pointerInfo.pointerId] = gTuioServer->addTuioCursor(xPos, yPos);
+                        gTuioServer->commitFrame();
+                    }
+                    else if (pointerInfo.pointerFlags & POINTER_FLAG_UPDATE) {
+                        // Handle update of touchpoint
+                        TUIO::TuioTime frameTime = TUIO::TuioTime::getSessionTime();
+                        if (gCursorMap[pointerInfo.pointerId]->getTuioTime() == frameTime) {
+                            break;
+                        }
+                        gTuioServer->initFrame(frameTime);
+                        gTuioServer->updateTuioCursor(gCursorMap[pointerInfo.pointerId], xPos, yPos);
+                        gTuioServer->commitFrame();
+                    }
+                    else if (pointerInfo.pointerFlags & POINTER_FLAG_UP) {
+                        // Handle removed touchpoint
+                        gTuioServer->initFrame(TUIO::TuioTime::getSessionTime());
+                        gTuioServer->removeTuioCursor(gCursorMap[pointerInfo.pointerId]);
+                        gTuioServer->commitFrame();
+                        gCursorMap.erase(pointerInfo.pointerId);
+                    }
+                }
+                break;
+            }
+        }
+    }
+
+    // Pass the hook along!
+    return CallNextHookEx(0, nCode, wParam, lParam);
+}
+
+Win32TouchHook::Win32TouchHook(void* nativeWindow)
+{
+    HWND hWnd = reinterpret_cast<HWND>(nativeWindow);
+    if (hWnd == nullptr) {
+        LINFO("No windowhandle available for touch input.");
+        return;
+    }
+
+    // Test for touch:
+    int value = GetSystemMetrics(SM_DIGITIZER);
+    if ((value & NID_READY) == 0) { 
+        // Don't bother setting up touch hooks?
+        return;
+    }
+    // stack ready, drivers installed and digitizer is ready for input
+    if (value & NID_MULTI_INPUT) {
+        // Digitizer is multitouch
+        LINFO("Found Multitouch input digitizer!");
+    }
+    if (value & NID_INTEGRATED_TOUCH) { 
+        // Integrated touch
+    }
+
+    // This should be needed, but we seem to receive messages even without it,
+    // probably a Win7+ behaviour
+    // Also - RegisterTouchWindow enables Windows gestures, which we don't want
+    // since they produce visual feedback for "press-and-tap" etc.
+    // RegisterTouchWindow(hWnd, TWF_FINETOUCH | TWF_WANTPALM);
+
+    // TODO: Would be nice to find out if the gesture "press-and-tap" can be disabled
+    // basically we don't really care for windows gestures for now...
+    // this disables press and hold (right-click) gesture
+    const DWORD dwHwndTabletProperty = TABLET_DISABLE_PRESSANDHOLD; 
+
+    ATOM atom = ::GlobalAddAtom(MICROSOFT_TABLETPENSERVICE_PROPERTY);
+    ::SetProp(hWnd, MICROSOFT_TABLETPENSERVICE_PROPERTY, reinterpret_cast<HANDLE>(dwHwndTabletProperty));
+    ::GlobalDeleteAtom(atom);
+
+    if (!gStarted) {
+        gStarted = true;
+        gTuioServer = new TUIO::TuioServer("localhost", 3333);
+        TUIO::TuioTime::initSession();
+        gTouchHook = SetWindowsHookExW(WH_GETMESSAGE, HookCallback, GetModuleHandleW(NULL), GetCurrentThreadId());
+        if (!gTouchHook) {
+            LINFO(fmt::format("Failed to setup WindowsHook for touch input redirection"));
+            delete gTuioServer;
+            gStarted = false;
+        }
+    }
+}
+
+Win32TouchHook::~Win32TouchHook() {
+    if (gStarted) {
+        UnhookWindowsHookEx(gTouchHook);
+        delete gTuioServer;
+    }
+}
+
+} // namespace openspace
+#endif // WIN32