tdf#108031 Area chart labels not rotated

This fixes recognition of x-axis or y-axis when the coordinate system
is rotated (3D-view). So the labels are rotated correctly.

Change-Id: Iaacfec943f3885c58e99a55585714a79f1d0d9d5
Reviewed-on: https://gerrit.libreoffice.org/38355
Reviewed-by: Jochen Nitschke <j.nitschke+logerrit@ok.de>
Tested-by: Jochen Nitschke <j.nitschke+logerrit@ok.de>

2 files changed, 23 insertions, 24 deletions

diff --git a/chart2/source/view/axes/Tickmarks.cxx b/chart2/source/view/axes/Tickmarks.cxx
index 95f967b3b215..3d6d25a044bf 100644
--- a/chart2/source/view/axes/Tickmarks.cxx
+++ b/chart2/source/view/axes/Tickmarks.cxx
@@ -172,13 +172,28 @@ TickFactory2D::~TickFactory2D()
 
 bool TickFactory2D::isHorizontalAxis() const
 {
-    return ( m_aAxisStartScreenPosition2D.getY() == m_aAxisEndScreenPosition2D.getY() );
+    // check trivial cases:
+    if ( m_aAxisStartScreenPosition2D.getY() == m_aAxisEndScreenPosition2D.getY() )
+        return true;
+    if ( m_aAxisStartScreenPosition2D.getX() == m_aAxisEndScreenPosition2D.getX() )
+        return false;
+
+    // for skew axes compare angle with horizontal vector
+    double fInclination = std::abs(B2DVector(m_aAxisEndScreenPosition2D-m_aAxisStartScreenPosition2D).angle(B2DVector(1.0, 0.0)));
+    return fInclination < F_PI4 || fInclination > (F_PI-F_PI4);
 }
 bool TickFactory2D::isVerticalAxis() const
 {
-    return ( m_aAxisStartScreenPosition2D.getX() == m_aAxisEndScreenPosition2D.getX() );
+    // check trivial cases:
+    if ( m_aAxisStartScreenPosition2D.getX() == m_aAxisEndScreenPosition2D.getX() )
+        return true;
+    if ( m_aAxisStartScreenPosition2D.getY() == m_aAxisEndScreenPosition2D.getY() )
+        return false;
+
+    // for skew axes compare angle with vertical vector
+    double fInclination = std::abs(B2DVector(m_aAxisEndScreenPosition2D-m_aAxisStartScreenPosition2D).angle(B2DVector(0.0, -1.0)));
+    return fInclination < F_PI4 || fInclination > (F_PI-F_PI4);
 }
-
 //static
 sal_Int32 TickFactory2D::getTickScreenDistance( TickIter& rIter )
 {
diff --git a/chart2/source/view/axes/VCartesianAxis.cxx b/chart2/source/view/axes/VCartesianAxis.cxx
index c53f890a07a6..9493102a93c4 100644
--- a/chart2/source/view/axes/VCartesianAxis.cxx
+++ b/chart2/source/view/axes/VCartesianAxis.cxx
@@ -104,25 +104,13 @@ Reference< drawing::XShape > createSingleLabel(
 
 bool lcl_doesShapeOverlapWithTickmark( const Reference< drawing::XShape >& xShape
                        , double fRotationAngleDegree
-                       , const basegfx::B2DVector& rTickScreenPosition
-                       , bool bIsHorizontalAxis, bool bIsVerticalAxis )
+                       , const basegfx::B2DVector& rTickScreenPosition )
 {
     if(!xShape.is())
         return false;
 
     ::basegfx::B2IRectangle aShapeRect = BaseGFXHelper::makeRectangle(xShape->getPosition(),AbstractShapeFactory::getSizeAfterRotation( xShape, fRotationAngleDegree ));
 
-    if( bIsVerticalAxis )
-    {
-        return ( (rTickScreenPosition.getY() >= aShapeRect.getMinY())
-            && (rTickScreenPosition.getY() <= aShapeRect.getMaxY()) );
-    }
-    if( bIsHorizontalAxis )
-    {
-        return ( (rTickScreenPosition.getX() >= aShapeRect.getMinX())
-            && (rTickScreenPosition.getX() <= aShapeRect.getMaxX()) );
-    }
-
     basegfx::B2IVector aPosition(
         static_cast<sal_Int32>( rTickScreenPosition.getX() )
         , static_cast<sal_Int32>( rTickScreenPosition.getY() ) );
@@ -744,8 +732,7 @@ bool VCartesianAxis::createTextShapes(
 
             if( lcl_doesShapeOverlapWithTickmark( pLastVisibleNeighbourTickInfo->xTextShape
                        , rAxisLabelProperties.fRotationAngleDegree
-                       , pTickInfo->aTickScreenPosition
-                       , bIsHorizontalAxis, bIsVerticalAxis ) )
+                       , pTickInfo->aTickScreenPosition ) )
             {
                 // This tick overlaps with its neighbor.  Try to stagger (if
                 // auto staggering is allowed) to avoid overlapping.
@@ -759,8 +746,7 @@ bool VCartesianAxis::createTextShapes(
                     if( !pLastVisibleNeighbourTickInfo ||
                         !lcl_doesShapeOverlapWithTickmark( pLastVisibleNeighbourTickInfo->xTextShape
                                 , rAxisLabelProperties.fRotationAngleDegree
-                                , pTickInfo->aTickScreenPosition
-                            , bIsHorizontalAxis, bIsVerticalAxis ) )
+                                , pTickInfo->aTickScreenPosition ) )
                         bOverlapsAfterAutoStagger = false;
                 }
 
@@ -841,8 +827,7 @@ bool VCartesianAxis::createTextShapes(
                         if( !pLastVisibleNeighbourTickInfo ||
                             !lcl_doesShapeOverlapWithTickmark( pLastVisibleNeighbourTickInfo->xTextShape
                                 , rAxisLabelProperties.fRotationAngleDegree
-                                , pTickInfo->aTickScreenPosition
-                                , bIsHorizontalAxis, bIsVerticalAxis ) )
+                                , pTickInfo->aTickScreenPosition ) )
                             bOverlapsAfterAutoStagger = false;
                     }
                 }
@@ -933,8 +918,7 @@ bool VCartesianAxis::createTextShapesSimple(
 
             if( lcl_doesShapeOverlapWithTickmark( pLastVisibleNeighbourTickInfo->xTextShape
                        , rAxisLabelProperties.fRotationAngleDegree
-                       , pTickInfo->aTickScreenPosition
-                       , bIsHorizontalAxis, bIsVerticalAxis ) )
+                       , pTickInfo->aTickScreenPosition ) )
             {
                 // This tick overlaps with its neighbor. Increment the visible
                 // tick intervals (if that's allowed) and start over.