tdf#124146 add (general) gesture event support to VCL

Reviewed-on: https://gerrit.libreoffice.org/69655
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
(cherry picked from commit 6b476080da0678faa59606ef814760bd4235de24)

Change-Id: I766930bb35071442e132b91477cd3d55e8f00f48

4 files changed, 128 insertions, 7 deletions

diff --git a/vcl/inc/salwtype.hxx b/vcl/inc/salwtype.hxx
index 1538c8e78a25..930da0c19972 100644
--- a/vcl/inc/salwtype.hxx
+++ b/vcl/inc/salwtype.hxx
@@ -23,6 +23,7 @@
 #include <i18nlangtag/lang.h>
 #include <rtl/ustring.hxx>
 #include <tools/solar.h>
+#include <vcl/GestureEvent.hxx>
 
 class SalGraphics;
 class SalFrame;
@@ -81,7 +82,9 @@ enum class SalEvent {
     StartReconversion,
     QueryCharPosition,
     Swipe,
-    LongPress
+    LongPress,
+    ExternalGesture,
+    Gesture,
 };
 
 // MOUSELEAVE must send, when the pointer leave the client area and
@@ -258,6 +261,15 @@ struct SalLongPressEvent
     long mnY;
 };
 
+struct SalGestureEvent
+{
+    GestureEventType meEventType;
+    PanningOrientation meOrientation;
+    double mfOffset;
+    long mnX;
+    long mnY;
+};
+
 typedef void (*SALTIMERPROC)();
 
 #endif // INCLUDED_VCL_INC_SALWTYPE_HXX
diff --git a/vcl/source/app/svapp.cxx b/vcl/source/app/svapp.cxx
index c49564e2fc4e..5376e2991401 100644
--- a/vcl/source/app/svapp.cxx
+++ b/vcl/source/app/svapp.cxx
@@ -161,11 +161,26 @@ struct ImplPostEventData
     ImplSVEvent *   mnEventId;
     KeyEvent        maKeyEvent;
     MouseEvent      maMouseEvent;
-
-    ImplPostEventData( VclEventId nEvent, vcl::Window* pWin, const KeyEvent& rKeyEvent ) :
-        mnEvent( nEvent ), mpWin( pWin ), mnEventId( nullptr ), maKeyEvent( rKeyEvent ) {}
-    ImplPostEventData( VclEventId nEvent, vcl::Window* pWin, const MouseEvent& rMouseEvent ) :
-        mnEvent( nEvent ), mpWin( pWin ), mnEventId( nullptr ), maMouseEvent( rMouseEvent ) {}
+    GestureEvent    maGestureEvent;
+
+    ImplPostEventData(VclEventId nEvent, vcl::Window* pWin, const KeyEvent& rKeyEvent)
+        : mnEvent(nEvent)
+        , mpWin(pWin)
+        , mnEventId(nullptr)
+        , maKeyEvent(rKeyEvent)
+    {}
+    ImplPostEventData(VclEventId nEvent, vcl::Window* pWin, const MouseEvent& rMouseEvent)
+        : mnEvent(nEvent)
+        , mpWin(pWin)
+        , mnEventId(nullptr)
+        , maMouseEvent(rMouseEvent)
+    {}
+    ImplPostEventData(VclEventId nEvent, vcl::Window* pWin, const GestureEvent& rGestureEvent)
+        : mnEvent(nEvent)
+        , mpWin(pWin)
+        , mnEventId(nullptr)
+        , maGestureEvent(rGestureEvent)
+    {}
 };
 
 Application* GetpApp()
@@ -874,7 +889,43 @@ ImplSVEvent * Application::PostKeyEvent( VclEventId nEvent, vcl::Window *pWin, K
     return nEventId;
 }
 
-ImplSVEvent * Application::PostMouseEvent( VclEventId nEvent, vcl::Window *pWin, MouseEvent const * pMouseEvent )
+ImplSVEvent* Application::PostGestureEvent(VclEventId nEvent, vcl::Window* pWin, GestureEvent const * pGestureEvent)
+{
+    const SolarMutexGuard aGuard;
+    ImplSVEvent * nEventId = nullptr;
+
+    if (pWin && pGestureEvent)
+    {
+        Point aTransformedPosition(pGestureEvent->mnX, pGestureEvent->mnY);
+
+        aTransformedPosition.AdjustX(pWin->GetOutOffXPixel());
+        aTransformedPosition.AdjustY(pWin->GetOutOffYPixel());
+
+        const GestureEvent aGestureEvent{
+            sal_Int32(aTransformedPosition.X()),
+            sal_Int32(aTransformedPosition.Y()),
+            pGestureEvent->meEventType,
+            pGestureEvent->mnOffset,
+            pGestureEvent->meOrientation
+        };
+
+        std::unique_ptr<ImplPostEventData> pPostEventData(new ImplPostEventData(nEvent, pWin, aGestureEvent));
+
+        nEventId = PostUserEvent(
+                       LINK( nullptr, Application, PostEventHandler ),
+                       pPostEventData.get());
+
+        if (nEventId)
+        {
+            pPostEventData->mnEventId = nEventId;
+            ImplGetSVData()->maAppData.maPostedEventList.emplace_back(pWin, pPostEventData.release());
+        }
+    }
+
+    return nEventId;
+}
+
+ImplSVEvent* Application::PostMouseEvent( VclEventId nEvent, vcl::Window *pWin, MouseEvent const * pMouseEvent )
 {
     const SolarMutexGuard aGuard;
     ImplSVEvent * nEventId = nullptr;
@@ -943,6 +994,11 @@ IMPL_STATIC_LINK( Application, PostEventHandler, void*, pCallData, void )
             pEventData = &pData->maKeyEvent;
         break;
 
+        case VclEventId::WindowGestureEvent:
+            nEvent = SalEvent::ExternalGesture;
+            pEventData = &pData->maGestureEvent;
+        break;
+
         default:
             nEvent = SalEvent::NONE;
             pEventData = nullptr;
diff --git a/vcl/source/window/commandevent.cxx b/vcl/source/window/commandevent.cxx
index b298022abc56..c5dcf7c8b00e 100644
--- a/vcl/source/window/commandevent.cxx
+++ b/vcl/source/window/commandevent.cxx
@@ -191,4 +191,13 @@ const CommandLongPressData* CommandEvent::GetLongPressData() const
         return nullptr;
 }
 
+const CommandGestureData* CommandEvent::GetGestureData() const
+{
+    if (mnCommand == CommandEventId::Gesture)
+        return static_cast<const CommandGestureData*>(mpData);
+    else
+        return nullptr;
+}
+
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/source/window/winproc.cxx b/vcl/source/window/winproc.cxx
index 567a8e7330c2..e914d4e414b6 100644
--- a/vcl/source/window/winproc.cxx
+++ b/vcl/source/window/winproc.cxx
@@ -27,6 +27,7 @@
 #include <vcl/unohelp.hxx>
 #include <vcl/timer.hxx>
 #include <vcl/event.hxx>
+#include <vcl/GestureEvent.hxx>
 #include <vcl/settings.hxx>
 #include <vcl/svapp.hxx>
 #include <vcl/cursor.hxx>
@@ -1546,6 +1547,30 @@ static bool ImplHandleLongPress(vcl::Window *pWindow, const SalLongPressEvent& r
     return aHandler.HandleEvent();
 }
 
+class HandleGeneralGestureEvent : public HandleGestureEvent
+{
+private:
+    CommandGestureData m_aGestureData;
+
+public:
+    HandleGeneralGestureEvent(vcl::Window* pWindow, const SalGestureEvent& rEvent)
+        : HandleGestureEvent(pWindow, Point(rEvent.mnX, rEvent.mnY))
+        , m_aGestureData(rEvent.mnX, rEvent.mnY, rEvent.meEventType, rEvent.mfOffset, rEvent.meOrientation)
+    {
+    }
+
+    virtual bool CallCommand(vcl::Window* pWindow, const Point& /*rMousePos*/) override
+    {
+        return ImplCallCommand(pWindow, CommandEventId::Gesture, &m_aGestureData);
+    }
+};
+
+static bool ImplHandleGestureEvent(vcl::Window* pWindow, const SalGestureEvent& rEvent)
+{
+    HandleGeneralGestureEvent aHandler(pWindow, rEvent);
+    return aHandler.HandleEvent();
+}
+
 static void ImplHandlePaint( vcl::Window* pWindow, const tools::Rectangle& rBoundRect, bool bImmediateUpdate )
 {
     // system paint events must be checked for re-mirroring
@@ -2529,7 +2554,26 @@ bool ImplWindowFrameProc( vcl::Window* _pWindow, SalEvent nEvent, const void* pE
             bRet = ImplHandleLongPress(pWindow, *static_cast<const SalLongPressEvent*>(pEvent));
             break;
 
+        case SalEvent::ExternalGesture:
+        {
+            auto const * pGestureEvent = static_cast<GestureEvent const *>(pEvent);
+
+            SalGestureEvent aSalGestureEvent;
+            aSalGestureEvent.mfOffset = pGestureEvent->mnOffset;
+            aSalGestureEvent.mnX = pGestureEvent->mnX;
+            aSalGestureEvent.mnY = pGestureEvent->mnY;
+            aSalGestureEvent.meEventType = pGestureEvent->meEventType;
+            aSalGestureEvent.meOrientation = pGestureEvent->meOrientation;
 
+            bRet = ImplHandleGestureEvent(pWindow, aSalGestureEvent);
+        }
+        break;
+        case SalEvent::Gesture:
+        {
+            auto const * aSalGestureEvent = static_cast<SalGestureEvent const *>(pEvent);
+            bRet = ImplHandleGestureEvent(pWindow, *aSalGestureEvent);
+        }
+        break;
         default:
             SAL_WARN( "vcl.layout", "ImplWindowFrameProc(): unknown event (" << (int)nEvent << ")" );
             break;