first cherry-pick for mac os table pressure fix

src/board/UBBoardView.cpp

@@ -864,12 +864,77 @@ void UBBoardView::setMultiselection(bool enable)
     mMultipleSelectionIsEnabled = enable;
 }
 
+// work around for handling tablet events on MAC OS with Qt 4.8.0 and above
+#if defined(Q_WS_MACX)
+bool UBBoardView::directTabletEvent(QEvent *event)
+{
+    QTabletEvent *tEvent = static_cast<QTabletEvent *>(event);
+    tEvent = new QTabletEvent(tEvent->type()
+        , mapFromGlobal(tEvent->pos())
+        , tEvent->globalPos()
+        , tEvent->hiResGlobalPos()
+        , tEvent->device()
+        , tEvent->pointerType()
+        , tEvent->pressure()
+        , tEvent->xTilt()
+        , tEvent->yTilt()
+        , tEvent->tangentialPressure()
+        , tEvent->rotation()
+        , tEvent->z()
+        , tEvent->modifiers()
+        , tEvent->uniqueId());
+
+    if (geometry().contains(tEvent->pos()))
+    {
+        if (NULL == widgetForTabletEvent(this->parentWidget(), tEvent->pos()))
+        {
+            tabletEvent(tEvent);
+            return true;
+        }
+    }
+    return false;
+}
+
+QWidget *UBBoardView::widgetForTabletEvent(QWidget *w, const QPoint &pos)
+{
+    Q_ASSERT(w);
+
+    UBBoardView *board = qobject_cast<UBBoardView *>(w);
+
+    QWidget *childAtPos = NULL;
+
+    QList<QObject *> childs = w->children();
+    foreach(QObject *child, childs)
+    {
+        QWidget *childWidget = qobject_cast<QWidget *>(child);
+        if (childWidget)
+        {
+            if (childWidget->isVisible() && childWidget->geometry().contains(pos))
+            {
+                QWidget *lastChild = widgetForTabletEvent(childWidget, pos);
+
+                if (board && board->viewport() == lastChild)
+                    continue;
+
+                if (NULL != lastChild)
+                    childAtPos = lastChild;
+                else
+                    childAtPos = childWidget;
+
+                break;
+            }
+            else
+                childAtPos = NULL;
+        }
+    }
+    return childAtPos;
+}
+#endif
 void UBBoardView::longPressEvent()
 {
    UBDrawingController *drawingController = UBDrawingController::drawingController();
    UBStylusTool::Enum currentTool = (UBStylusTool::Enum)UBDrawingController::drawingController ()->stylusTool ();
 
-
    disconnect(&mLongPressTimer, SIGNAL(timeout()), this, SLOT(longPressEvent()));
 
    if (UBStylusTool::Selector == currentTool)

src/board/UBBoardView.h

@@ -20,7 +20,6 @@
  */
 
 
-
 #ifndef UBBOARDVIEW_H_
 #define UBBOARDVIEW_H_
 
@@ -54,7 +53,11 @@ class UBBoardView : public QGraphicsView
 
         void setMultiselection(bool enable);
         bool isMultipleSelectionEnabled() { return mMultipleSelectionIsEnabled; }
-
+// work around for handling tablet events on MAC OS with Qt 4.8.0 and above
+#if defined(Q_WS_MACX)
+        bool directTabletEvent(QEvent *event);
+        QWidget *widgetForTabletEvent(QWidget *w, const QPoint &pos);
+#endif
     signals:
 
         void resized(QResizeEvent* event);
@@ -153,7 +156,7 @@ class UBBoardView : public QGraphicsView
 
         bool moveRubberBand;
         UBRubberBand *mUBRubberBand;
-        
+
         QList<QGraphicsItem *> mRubberedItems;
         QSet<QGraphicsItem*> mJustSelectedItems;
 

src/gui/UBCachePropertiesWidget.cpp

@@ -372,4 +372,3 @@ void UBCachePropertiesWidget::onCacheEnabled()
 {
     emit showTab(this);
 }
-

src/gui/UBMainWindow.cpp

@@ -27,6 +27,10 @@
 #include "core/UBApplication.h"
 #include "core/UBApplicationController.h"
 #include "board/UBBoardController.h"
+// work around for handling tablet events on MAC OS with Qt 4.8.0 and above
+#if defined(Q_WS_MACX)
+#include "board/UBBoardView.h"
+#endif
 
 #include "core/memcheck.h"
 
@@ -145,6 +149,34 @@ void UBMainWindow::closeEvent(QCloseEvent *event)
     emit closeEvent_Signal(event);
 }
 
+// work around for handling tablet events on MAC OS with Qt 4.8.0 and above
+#if defined(Q_WS_MACX)
+bool UBMainWindow::event(QEvent *event)
+{
+    bool bRes = QMainWindow::event(event);
+
+    if (NULL != UBApplication::boardController)
+    {
+        UBBoardView *controlV = UBApplication::boardController->controlView();
+        if (controlV && controlV->isVisible())
+        {
+            switch (event->type())
+            {
+            case QEvent::TabletEnterProximity:
+            case QEvent::TabletLeaveProximity:
+            case QEvent::TabletMove:
+            case QEvent::TabletPress:
+            case QEvent::TabletRelease:
+                {
+                    return controlV->directTabletEvent(event);
+                }
+            }
+        }
+    }
+    return bRes;
+}
+#endif
+
 void UBMainWindow::onExportDone()
 {
     // HACK :  When opening the file save dialog during the document exportation,

src/gui/UBMainWindow.h

@@ -83,6 +83,10 @@ class UBMainWindow : public QMainWindow, public Ui::MainWindow
         QWidget *mDocumentsWidget;
 
 private:
+// work around for handling tablet events on MAC OS with Qt 4.8.0 and above
+#if defined(Q_WS_MACX)
+        bool event(QEvent *event);
+#endif
         UBDownloadWidget* mpDownloadWidget;
 };