EvdevTouch: Added "invertx" and "inverty" parameters

In some cases the event axises reported by evdev are inverted.
This commit adds plugin parameters invertx and inverty to
invert X- and Y-axis.

Change-Id: Idaa63affd8321aa47974788c32d978fc21eb3dec
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/platformsupport/input/evdevtouch/qevdevtouch.cpp b/src/platformsupport/input/evdevtouch/qevdevtouch.cpp
index 563edf4fd7..6ed4abaeee 100644
--- a/src/platformsupport/input/evdevtouch/qevdevtouch.cpp
+++ b/src/platformsupport/input/evdevtouch/qevdevtouch.cpp
@@ -184,6 +184,8 @@ QEvdevTouchScreenHandler::QEvdevTouchScreenHandler(const QString &specification,
 
     QString dev;
     int rotationAngle = 0;
+    bool invertx = false;
+    bool inverty = false;
     for (int i = 0; i < args.count(); ++i) {
         if (args.at(i).startsWith(QLatin1String("/dev/")) && dev.isEmpty()) {
             dev = args.at(i);
@@ -201,6 +203,10 @@ QEvdevTouchScreenHandler::QEvdevTouchScreenHandler(const QString &specification,
                     break;
                 }
             }
+        } else if (args.at(i) == QLatin1String("invertx")) {
+            invertx = true;
+        } else if (args.at(i) == QLatin1String("inverty")) {
+            inverty = true;
         }
     }
 
@@ -326,6 +332,12 @@ QEvdevTouchScreenHandler::QEvdevTouchScreenHandler(const QString &specification,
     if (rotationAngle)
         d->m_rotate = QTransform::fromTranslate(0.5, 0.5).rotate(rotationAngle).translate(-0.5, -0.5);
 
+    if (invertx)
+        d->m_rotate *= QTransform::fromTranslate(0.5, 0.5).scale(-1.0, 1.0).translate(-0.5, -0.5);
+
+    if (inverty)
+        d->m_rotate *= QTransform::fromTranslate(0.5, 0.5).scale(1.0, -1.0).translate(-0.5, -0.5);
+
     d->registerDevice();
 }