Windows: Add platform plugin parameter for tablet absolute range.

Make the range for detecting relative (mouse mode) configureable
using  -platform windows:tabletabsoluterange=50

Task-number: QTBUG-36937

Change-Id: I44f928e53cb41b246c44554ec7f71bfbdf03c147
Reviewed-by: Arthur Krebsbach <Arthur.Krebsbach@Wacom.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>

src/plugins/platforms/windows/qwindowscontext.cpp

@@ -341,6 +341,16 @@ QWindowsContext::~QWindowsContext()
     m_instance = 0;
 }
 
+void QWindowsContext::setTabletAbsoluteRange(int a)
+{
+#if !defined(QT_NO_TABLETEVENT) && !defined(Q_OS_WINCE)
+    if (!d->m_tabletSupport.isNull())
+        d->m_tabletSupport->setAbsoluteRange(a);
+#else
+    Q_UNUSED(a)
+#endif
+}
+
 QWindowsContext *QWindowsContext::instance()
 {
     return m_instance;

src/plugins/platforms/windows/qwindowscontext.h

@@ -183,6 +183,8 @@ public:
 
     void setWindowCreationContext(const QSharedPointer<QWindowCreationContext> &ctx);
 
+    void setTabletAbsoluteRange(int a);
+
     // Returns a combination of SystemInfoFlags
     unsigned systemInfo() const;
 

src/plugins/platforms/windows/qwindowsintegration.cpp

@@ -143,7 +143,7 @@ struct QWindowsIntegrationPrivate
     explicit QWindowsIntegrationPrivate(const QStringList &paramList);
     ~QWindowsIntegrationPrivate();
 
-    const unsigned m_options;
+    unsigned m_options;
     QWindowsContext m_context;
     QPlatformFontDatabase *m_fontDatabase;
 #ifndef QT_NO_CLIPBOARD
@@ -165,7 +165,8 @@ struct QWindowsIntegrationPrivate
     QWindowsServices m_services;
 };
 
-static inline unsigned parseOptions(const QStringList &paramList)
+static inline unsigned parseOptions(const QStringList &paramList,
+                                    int *tabletAbsoluteRange)
 {
     unsigned options = 0;
     foreach (const QString &param, paramList) {
@@ -187,15 +188,21 @@ static inline unsigned parseOptions(const QStringList &paramList)
             options |= QWindowsIntegration::DontPassOsMouseEventsSynthesizedFromTouch;
         } else if (param.startsWith(QLatin1String("verbose="))) {
             QWindowsContext::verbose = param.right(param.size() - 8).toInt();
+        } else if (param.startsWith(QLatin1String("tabletabsoluterange="))) {
+            *tabletAbsoluteRange = param.rightRef(param.size() - 20).toInt();
         }
     }
     return options;
 }
 
 QWindowsIntegrationPrivate::QWindowsIntegrationPrivate(const QStringList &paramList)
-    : m_options(parseOptions(paramList))
+    : m_options(0)
     , m_fontDatabase(0)
 {
+    int tabletAbsoluteRange = -1;
+    m_options = parseOptions(paramList, &tabletAbsoluteRange);
+    if (tabletAbsoluteRange >= 0)
+        m_context.setTabletAbsoluteRange(tabletAbsoluteRange);
 }
 
 QWindowsIntegrationPrivate::~QWindowsIntegrationPrivate()

src/plugins/platforms/windows/qwindowstabletsupport.cpp

@@ -159,6 +159,7 @@ bool QWindowsWinTab32DLL::init()
 QWindowsTabletSupport::QWindowsTabletSupport(HWND window, HCTX context)
     : m_window(window)
     , m_context(context)
+    , m_absoluteRange(20)
     , m_tiltSupport(false)
     , m_currentDevice(-1)
 {
@@ -402,7 +403,6 @@ bool QWindowsTabletSupport::translateTabletPacketEvent()
     //    in which case we snap the position to the mouse position.
     // It seems there is no way to find out the mode programmatically, the LOGCONTEXT orgX/Y/Ext
     // area is always the virtual desktop.
-    enum { absoluteRange = 20 };
     const QRect virtualDesktopArea = QGuiApplication::primaryScreen()->virtualGeometry();
 
     qCDebug(lcQpaTablet) << __FUNCTION__ << "processing " << packetCount
@@ -427,7 +427,7 @@ bool QWindowsTabletSupport::translateTabletPacketEvent()
 
         // Positions should be almost the same if we are in absolute
         // mode. If they are not, use the mouse location.
-        if ((mouseLocation - globalPos).manhattanLength() > absoluteRange) {
+        if ((mouseLocation - globalPos).manhattanLength() > m_absoluteRange) {
             globalPos = mouseLocation;
             globalPosF = globalPos;
         }

src/plugins/platforms/windows/qwindowstabletsupport.h

@@ -124,6 +124,9 @@ public:
     bool translateTabletProximityEvent(WPARAM wParam, LPARAM lParam);
     bool translateTabletPacketEvent();
 
+    int absoluteRange() const { return m_absoluteRange; }
+    void setAbsoluteRange(int a) { m_absoluteRange = a; }
+
 private:
     unsigned options() const;
     QWindowsTabletDeviceData tabletInit(const quint64 uniqueId, const UINT cursorType) const;
@@ -131,6 +134,7 @@ private:
     static QWindowsWinTab32DLL m_winTab32DLL;
     const HWND m_window;
     const HCTX m_context;
+    int m_absoluteRange;
     bool m_tiltSupport;
     QVector<QWindowsTabletDeviceData> m_devices;
     int m_currentDevice;