1 files changed, 42 insertions, 10 deletions

diff --git a/core/apps/calibrate/calibrate.cpp b/core/apps/calibrate/calibrate.cpp
index 54fa8ec..1f4fb1b 100644
--- a/core/apps/calibrate/calibrate.cpp
+++ b/core/apps/calibrate/calibrate.cpp
@@ -99,10 +99,42 @@ bool Calibrate::sanityCheck()
 {
-        QRect r ( cd.devPoints[ QWSPointerCalibrationData::TopLeft ], cd.devPoints[ QWSPointerCalibrationData::BottomRight ] );
-        r = r. normalize ( ); // This should also handle rotated TS controllers
-
-        cd. devPoints [QWSPointerCalibrationData::TopRight]   = r. topRight ( );
-        cd. devPoints [QWSPointerCalibrationData::BottomLeft] = r. bottomLeft ( );
-        cd. devPoints [QWSPointerCalibrationData::Center]     = r. center ( );
-
-                return true;
+        QPoint tl = cd.devPoints[QWSPointerCalibrationData::TopLeft];
+        QPoint tr = cd.devPoints[QWSPointerCalibrationData::TopRight];
+        QPoint bl = cd.devPoints[QWSPointerCalibrationData::BottomLeft];
+        QPoint br = cd.devPoints[QWSPointerCalibrationData::BottomRight];
+
+        // not needed anywhere .. just calculate it, so it's there
+        cd. devPoints [QWSPointerCalibrationData::Center] = QRect ( tl, br ). normalize ( ). center ( );
+
+        int dlx = QABS( bl. x ( ) - tl. x ( ));
+        int dly = QABS( bl. y ( ) - tl. y ( ));
+        int drx = QABS( br. x ( ) - tr. x ( ));
+        int dry = QABS( br. y ( ) - tr. y ( ));
+        int dtx = QABS( tr. x ( ) - tl. x ( ));
+        int dty = QABS( tr. y ( ) - tl. y ( ));
+        int dbx = QABS( br. x ( ) - bl. x ( ));
+        int dby = QABS( br. y ( ) - bl. y ( ));
+
+        int dl = (int) ::sqrt (( dlx * dlx ) + ( dly * dly )); // calculate vector lengths for all sides
+        int dr = (int) ::sqrt (( drx * drx ) + ( dry * dry ));
+        int dt = (int) ::sqrt (( dtx * dtx ) + ( dty * dty ));
+        int db = (int) ::sqrt (( dbx * dbx ) + ( dby * dby ));
+    
+                // Calculate leeway for x/y (we do not care if diff1/diff2 is for x or y here !)
+        int diff1 = QABS( dl - dr );
+        int avg1  = ( dl + dr ) / 2;
+        int diff2 = QABS( dt - db );
+        int avg2 = ( dt + db ) / 2;
+
+        // Calculate leeway for "real" vector length against "manhattan" vector length
+        // This is a check, if the rect is rotated (other then 0/90/180/270)
+        // It needs to be performed only for the triange (bl, tl, tr)
+        int diff3 = QABS(( dlx + dly + dtx + dty ) - ( dl + dt )); 
+        int avg3 = (( dlx + dly + dtx + dty ) + ( dl + dt )) / 2;
+
+        if (( diff1 > ( avg1 / 20 )) || // 5% leeway
+            ( diff2 > ( avg2 / 20 )) ||
+            ( diff3 > ( avg3 / 20 )))
+                return false;
+        else
+                return true;
         }
@@ -168,4 +200,4 @@ void Calibrate::mouseReleaseEvent( QMouseEvent * )
         cd.devPoints[ location ] = penPos;
-        if ( location == QWSPointerCalibrationData::TopLeft ) {
-                location = QWSPointerCalibrationData::BottomRight;
+        if ( location < QWSPointerCalibrationData::TopRight ) {
+                location = (QWSPointerCalibrationData::Location) ( int( location ) + 1 );
         }