Reworking the squares size

src/board/UBBoardController.cpp

@@ -109,7 +109,10 @@ UBBoardController::UBBoardController(UBMainWindow* mainWindow)
     mMarkerColorOnDarkBackground = UBSettings::settings()->markerColors(true).at(markerColorIndex);
     mMarkerColorOnLightBackground = UBSettings::settings()->markerColors(false).at(markerColorIndex);
 
-    UBSettings::settings()->crossSize = UBGeometryUtils::millimetersPerCentimeter * 4;
+    QDesktopWidget* desktop = UBApplication::desktop();
+    int dpiCommon = (desktop->physicalDpiX() + desktop->physicalDpiY()) / 2;
+    int sPixelsPerMillimeter = qRound(dpiCommon / UBGeometryUtils::inchSize);
+    UBSettings::settings()->crossSize = 10*sPixelsPerMillimeter;
 }
 
 

src/frameworks/UBGeometryUtils.cpp

@@ -23,6 +23,7 @@ const int UBGeometryUtils::halfCentimeterGraduationHeight = 10;
 const int UBGeometryUtils::millimeterGraduationHeight = 5;
 const int UBGeometryUtils::millimetersPerCentimeter = 10;
 const int UBGeometryUtils::millimetersPerHalfCentimeter = 5;
+const float UBGeometryUtils::inchSize = 25.4f;
 
 UBGeometryUtils::UBGeometryUtils()
 {

src/frameworks/UBGeometryUtils.h

@@ -43,6 +43,7 @@ class UBGeometryUtils
         const static int millimeterGraduationHeight;
         const static int millimetersPerCentimeter;
         const static int millimetersPerHalfCentimeter;
+        const static float inchSize;
 };
 
 #endif /* UBGEOMETRYUTILS_H_ */

src/tools/UBAbstractDrawRuler.cpp

@@ -47,7 +47,7 @@ UBAbstractDrawRuler::UBAbstractDrawRuler()
 	//we actually need to evaluate pixels per millimeter
 	QDesktopWidget* desktop = UBApplication::desktop();
 	int dpiCommon = (desktop->physicalDpiX() + desktop->physicalDpiY()) / 2;
-	sPixelsPerMillimeter = qRound(dpiCommon / 25.4f);//because 1inch = 25.4 mm
+    sPixelsPerMillimeter = qRound(dpiCommon / UBGeometryUtils::inchSize);
 
 }