Windows QPA: Refactor the tablet code

- Port to C++ 11:
  - Use member initialization for QWindowsTabletDeviceData
  - Use nullptr
- Fix the debug operator for QWindowsTabletDeviceData

Change-Id: I6ed1141d7064a4ea2717d36ec0bb2dceea857d46
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

1 files changed, 16 insertions, 15 deletions

diff --git a/src/plugins/platforms/windows/qwindowstabletsupport.h b/src/plugins/platforms/windows/qwindowstabletsupport.h
index 340818c3f7..0075216d8e 100644
--- a/src/plugins/platforms/windows/qwindowstabletsupport.h
+++ b/src/plugins/platforms/windows/qwindowstabletsupport.h
@@ -83,22 +83,23 @@ struct QWindowsWinTab32DLL
 
 struct QWindowsTabletDeviceData
 {
-    QWindowsTabletDeviceData() : minPressure(0), maxPressure(0), minTanPressure(0),
-        maxTanPressure(0), minX(0), maxX(0), minY(0), maxY(0), minZ(0), maxZ(0),
-        uniqueId(0), currentDevice(0), currentPointerType(0) {}
-
     QPointF scaleCoordinates(int coordX, int coordY,const QRect &targetArea) const;
     qreal scalePressure(qreal p) const { return p / qreal(maxPressure - minPressure); }
     qreal scaleTangentialPressure(qreal p) const { return p / qreal(maxTanPressure - minTanPressure); }
 
-    int minPressure;
-    int maxPressure;
-    int minTanPressure;
-    int maxTanPressure;
-    int minX, maxX, minY, maxY, minZ, maxZ;
-    qint64 uniqueId;
-    int currentDevice;
-    int currentPointerType;
+    int minPressure = 0;
+    int maxPressure = 0;
+    int minTanPressure = 0;
+    int maxTanPressure = 0;
+    int minX = 0;
+    int maxX = 0;
+    int minY = 0;
+    int maxY = 0;
+    int minZ = 0;
+    int maxZ = 0;
+    qint64 uniqueId = 0;
+    int currentDevice = 0;
+    int currentPointerType = 0;
 };
 
 #ifndef QT_NO_DEBUG_STREAM
@@ -145,10 +146,10 @@ private:
     static QWindowsWinTab32DLL m_winTab32DLL;
     const HWND m_window;
     const HCTX m_context;
-    int m_absoluteRange;
-    bool m_tiltSupport;
+    int m_absoluteRange = 20;
+    bool m_tiltSupport = false;
     QVector<QWindowsTabletDeviceData> m_devices;
-    int m_currentDevice;
+    int m_currentDevice = -1;
     QPointF m_oldGlobalPosF;
     Mode m_mode = PenMode;
     State m_state = PenUp;