Improve handling errors cases for points of intersection.

Instead of silence setting coordinate to (0;0) show a warning message. Also for
tool "Point of Lines intersection" set coordinates to (0;0) instead of skipping
creating a point. This will prevent failing to open a pattern file.

--HG--
branch : develop

src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoollineintersect.cpp

@@ -140,9 +140,13 @@ VToolLineIntersect* VToolLineIntersect::Create(VToolLineIntersectInitData initDa
     QLineF line1(static_cast<QPointF>(*p1Line1), static_cast<QPointF>(*p2Line1));
     QLineF line2(static_cast<QPointF>(*p1Line2), static_cast<QPointF>(*p2Line2));
     QPointF fPoint;
-    QLineF::IntersectType intersect = line1.intersect(line2, &fPoint);
+    const QLineF::IntersectType intersect = line1.intersect(line2, &fPoint);
-    if (intersect == QLineF::UnboundedIntersection || intersect == QLineF::BoundedIntersection)
+    if (intersect == QLineF::NoIntersection)
     {
+        qWarning() << tr("Error calculating point '%1'. Lines (%2;%3) and (%4;%5) have no point of intersection")
+                      .arg(initData.name, p1Line1->name(), p2Line1->name(), p1Line2->name(), p2Line2->name());
+    }
+
     VPointF *p = new VPointF(fPoint, initData.name, initData.mx, initData.my);
     p->SetShowLabel(initData.showLabel);
 
@@ -180,7 +184,6 @@ VToolLineIntersect* VToolLineIntersect::Create(VToolLineIntersectInitData initDa
         initData.doc->IncrementReferens(p2Line2->getIdTool());
         return point;
     }
-    }
     return nullptr;
 }
 

src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofintersectionarcs.cpp

@@ -112,7 +112,14 @@ VToolPointOfIntersectionArcs *VToolPointOfIntersectionArcs::Create(VToolPointOfI
     const QSharedPointer<VArc> firstArc = initData.data->GeometricObject<VArc>(initData.firstArcId);
     const QSharedPointer<VArc> secondArc = initData.data->GeometricObject<VArc>(initData.secondArcId);
 
-    const QPointF point = FindPoint(firstArc.data(), secondArc.data(), initData.pType);
+    QPointF point;
+    const bool success = FindPoint(firstArc.data(), secondArc.data(), initData.pType, &point);
+
+    if (not success)
+    {
+        qWarning() << tr("Error calculating point '%1'. Arcs '%2' and '%3' have no point of intersection")
+                      .arg(initData.name, firstArc->name(), secondArc->name());
+    }
 
     VPointF *p = new VPointF(point, initData.name, initData.mx, initData.my);
     p->SetShowLabel(initData.showLabel);
@@ -145,8 +152,11 @@ VToolPointOfIntersectionArcs *VToolPointOfIntersectionArcs::Create(VToolPointOfI
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-QPointF VToolPointOfIntersectionArcs::FindPoint(const VArc *arc1, const VArc *arc2, const CrossCirclesPoint pType)
+bool VToolPointOfIntersectionArcs::FindPoint(const VArc *arc1, const VArc *arc2, const CrossCirclesPoint pType,
+                                             QPointF *intersectionPoint)
 {
+    SCASSERT(intersectionPoint != nullptr)
+
     QPointF p1, p2;
     const QPointF centerArc1 = static_cast<QPointF>(arc1->GetCenter());
     const QPointF centerArc2 = static_cast<QPointF>(arc2->GetCenter());
@@ -187,24 +197,28 @@ QPointF VToolPointOfIntersectionArcs::FindPoint(const VArc *arc1, const VArc *ar
                 case 2:
                     if (pType == CrossCirclesPoint::FirstPoint)
                     {
-                        return p1;
+                        *intersectionPoint = p1;
+                        return true;
                     }
                     else
                     {
-                        return p2;
+                        *intersectionPoint = p2;
+                        return true;
                     }
                 case 1:
                     if (flagP1)
                     {
-                        return p1;
+                        *intersectionPoint = p1;
+                        return true;
                     }
                     else
                     {
-                        return p2;
+                        *intersectionPoint = p2;
+                        return true;
                     }
                 case 0:
                 default:
-                    return QPointF();
+                    return false;
             }
 
             break;
@@ -212,18 +226,20 @@ QPointF VToolPointOfIntersectionArcs::FindPoint(const VArc *arc1, const VArc *ar
         case 1:
             if (arc1->IsIntersectLine(r1Arc1) && arc2->IsIntersectLine(r1Arc2))
             {
-                return p1;
+                *intersectionPoint = p1;
+                return true;
             }
             else
             {
-                return QPointF();
+                return false;
             }
         case 3:
         case 0:
         default:
             break;
     }
-    return QPointF();
+
+    return false;
 }
 
 //---------------------------------------------------------------------------------------------------------------------

src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofintersectionarcs.h

@@ -67,7 +67,8 @@ public:
     static VToolPointOfIntersectionArcs *Create(QSharedPointer<DialogTool> dialog, VMainGraphicsScene  *scene,
                                                 VAbstractPattern *doc, VContainer *data);
     static VToolPointOfIntersectionArcs *Create(VToolPointOfIntersectionArcsInitData initData);
-    static QPointF FindPoint(const VArc *arc1, const VArc *arc2, const CrossCirclesPoint pType);
+    static bool FindPoint(const VArc *arc1, const VArc *arc2, const CrossCirclesPoint pType,
+                          QPointF *intersectionPoint);
     static const QString ToolType;
     virtual int  type() const Q_DECL_OVERRIDE {return Type;}
     enum { Type = UserType + static_cast<int>(Tool::PointOfIntersectionArcs) };

src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofintersectioncircles.cpp

@@ -124,8 +124,15 @@ VToolPointOfIntersectionCircles::Create(VToolPointOfIntersectionCirclesInitData
     const VPointF c1Point = *initData.data->GeometricObject<VPointF>(initData.firstCircleCenterId);
     const VPointF c2Point = *initData.data->GeometricObject<VPointF>(initData.secondCircleCenterId);
 
-    const QPointF point = FindPoint(static_cast<QPointF>(c1Point), static_cast<QPointF>(c2Point), calcC1Radius,
+    QPointF point;
-                                    calcC2Radius, initData.crossPoint);
+    const bool success = FindPoint(static_cast<QPointF>(c1Point), static_cast<QPointF>(c2Point), calcC1Radius,
+                                   calcC2Radius, initData.crossPoint, &point);
+
+    if (not success)
+    {
+        qWarning() << tr("Error calculating point '%1'. Circles with centers in points '%2' and '%3' have no point "
+                         "of intersection").arg(initData.name, c1Point.name(), c2Point.name());
+    }
 
     VPointF *p = new VPointF(point, initData.name, initData.mx, initData.my);
     p->SetShowLabel(initData.showLabel);
@@ -158,9 +165,12 @@ VToolPointOfIntersectionCircles::Create(VToolPointOfIntersectionCirclesInitData
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-QPointF VToolPointOfIntersectionCircles::FindPoint(const QPointF &c1Point, const QPointF &c2Point, qreal c1Radius,
+bool VToolPointOfIntersectionCircles::FindPoint(const QPointF &c1Point, const QPointF &c2Point, qreal c1Radius,
-                                                   qreal c2Radius, const CrossCirclesPoint crossPoint)
+                                                qreal c2Radius, const CrossCirclesPoint crossPoint,
+                                                QPointF *intersectionPoint)
 {
+    SCASSERT(intersectionPoint != nullptr)
+
     QPointF p1, p2;
     const int res = VGObject::IntersectionCircles(c1Point, c1Radius, c2Point, c2Radius, p1, p2);
 
@@ -169,18 +179,21 @@ QPointF VToolPointOfIntersectionCircles::FindPoint(const QPointF &c1Point, const
         case 2:
             if (crossPoint == CrossCirclesPoint::FirstPoint)
             {
-                return p1;
+                *intersectionPoint = p1;
+                return true;
             }
             else
             {
-                return p2;
+                *intersectionPoint = p2;
+                return true;
             }
         case 1:
-            return p1;
+            *intersectionPoint = p1;
+            return true;
         case 3:
         case 0:
         default:
-            return QPointF();
+            return false;
     }
 }
 

src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofintersectioncircles.h

@@ -71,8 +71,8 @@ public:
     static VToolPointOfIntersectionCircles *Create(QSharedPointer<DialogTool> dialog, VMainGraphicsScene  *scene,
                                                    VAbstractPattern *doc, VContainer *data);
     static VToolPointOfIntersectionCircles *Create(VToolPointOfIntersectionCirclesInitData &initData);
-    static QPointF FindPoint(const QPointF &c1Point, const QPointF &c2Point, qreal c1Radius, qreal c2Radius,
+    static bool FindPoint(const QPointF &c1Point, const QPointF &c2Point, qreal c1Radius, qreal c2Radius,
-                             const CrossCirclesPoint crossPoint);
+                             const CrossCirclesPoint crossPoint, QPointF *intersectionPoint);
     static const QString ToolType;
     virtual int  type() const Q_DECL_OVERRIDE {return Type;}
     enum { Type = UserType + static_cast<int>(Tool::PointOfIntersectionCircles) };

src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofintersectioncurves.cpp

@@ -115,8 +115,15 @@ VToolPointOfIntersectionCurves *VToolPointOfIntersectionCurves::Create(VToolPoin
     auto curve1 = initData.data->GeometricObject<VAbstractCurve>(initData.firstCurveId);
     auto curve2 = initData.data->GeometricObject<VAbstractCurve>(initData.secondCurveId);
 
-    const QPointF point = VToolPointOfIntersectionCurves::FindPoint(curve1->GetPoints(), curve2->GetPoints(),
+    QPointF point;
-                                                                    initData.vCrossPoint, initData.hCrossPoint);
+    const bool success = VToolPointOfIntersectionCurves::FindPoint(curve1->GetPoints(), curve2->GetPoints(),
+                                                                   initData.vCrossPoint, initData.hCrossPoint, &point);
+
+    if (not success)
+    {
+        qWarning() << tr("Error calculating point '%1'. Curves '%2' and '%3' have no point of intersection")
+                      .arg(initData.name, curve1->name(), curve2->name());
+    }
 
     VPointF *p = new VPointF(point, initData.name, initData.mx, initData.my);
     p->SetShowLabel(initData.showLabel);
@@ -149,13 +156,16 @@ VToolPointOfIntersectionCurves *VToolPointOfIntersectionCurves::Create(VToolPoin
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-QPointF VToolPointOfIntersectionCurves::FindPoint(const QVector<QPointF> &curve1Points,
+bool VToolPointOfIntersectionCurves::FindPoint(const QVector<QPointF> &curve1Points,
                                                const QVector<QPointF> &curve2Points,
-                                                  VCrossCurvesPoint vCrossPoint, HCrossCurvesPoint hCrossPoint)
+                                               VCrossCurvesPoint vCrossPoint, HCrossCurvesPoint hCrossPoint,
+                                               QPointF *intersectionPoint)
 {
+    SCASSERT(intersectionPoint != nullptr)
+
     if (curve1Points.isEmpty() || curve2Points.isEmpty())
     {
-        return QPointF();
+        return false;
     }
 
     QVector<QPointF> intersections;
@@ -167,12 +177,13 @@ QPointF VToolPointOfIntersectionCurves::FindPoint(const QVector<QPointF> &curve1
 
     if (intersections.isEmpty())
     {
-        return QPointF();
+        return false;
     }
 
     if (intersections.size() == 1)
     {
-        return intersections.at(0);
+        *intersectionPoint = intersections.at(0);
+        return true;
     }
 
     QVector<QPointF> vIntersections;
@@ -219,12 +230,13 @@ QPointF VToolPointOfIntersectionCurves::FindPoint(const QVector<QPointF> &curve1
 
     if (vIntersections.isEmpty())
     {
-        return QPointF();
+        return false;
     }
 
     if (vIntersections.size() == 1)
     {
-        return vIntersections.at(0);
+        *intersectionPoint = vIntersections.at(0);
+        return true;
     }
 
     QPointF crossPoint = vIntersections.at(0);
@@ -258,7 +270,8 @@ QPointF VToolPointOfIntersectionCurves::FindPoint(const QVector<QPointF> &curve1
         }
     }
 
-    return crossPoint;
+    *intersectionPoint = crossPoint;
+    return true;
 }
 
 //---------------------------------------------------------------------------------------------------------------------

src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolpointofintersectioncurves.h

@@ -69,8 +69,8 @@ public:
     static VToolPointOfIntersectionCurves *Create(QSharedPointer<DialogTool> dialog, VMainGraphicsScene  *scene,
                                                   VAbstractPattern *doc, VContainer *data);
     static VToolPointOfIntersectionCurves *Create(VToolPointOfIntersectionCurvesInitData initData);
-    static QPointF FindPoint(const QVector<QPointF> &curve1Points, const QVector<QPointF> &curve2Points,
+    static bool FindPoint(const QVector<QPointF> &curve1Points, const QVector<QPointF> &curve2Points,
-                             VCrossCurvesPoint vCrossPoint, HCrossCurvesPoint hCrossPoint);
+                             VCrossCurvesPoint vCrossPoint, HCrossCurvesPoint hCrossPoint, QPointF *intersectionPoint);
     static const QString ToolType;
     virtual int  type() const Q_DECL_OVERRIDE {return Type;}
     enum { Type = UserType + static_cast<int>(Tool::PointOfIntersectionCurves) };

src/libs/vtools/visualization/line/vistoolpointofintersectionarcs.cpp

@@ -78,7 +78,8 @@ void VisToolPointOfIntersectionArcs::RefreshGeometry()
             const QSharedPointer<VArc> arc2 = Visualization::data->GeometricObject<VArc>(arc2Id);
             DrawPath(arc2Path, arc2->GetPath(), arc2->DirectionArrows(), Qt::darkRed, Qt::SolidLine, Qt::RoundCap);
 
-            const QPointF fPoint = VToolPointOfIntersectionArcs::FindPoint(arc1.data(), arc2.data(), crossPoint);
+            QPointF fPoint;
+            VToolPointOfIntersectionArcs::FindPoint(arc1.data(), arc2.data(), crossPoint, &fPoint);
             DrawPoint(point, fPoint, mainColor);
         }
     }

src/libs/vtools/visualization/line/vistoolpointofintersectioncircles.cpp

@@ -80,9 +80,10 @@ void VisToolPointOfIntersectionCircles::RefreshGeometry()
                 c2Path->setRect(PointRect(c2Radius));
                 DrawPoint(c2Path, static_cast<QPointF>(*second), Qt::darkRed, Qt::DashLine);
 
-                const QPointF fPoint = VToolPointOfIntersectionCircles::FindPoint(static_cast<QPointF>(*first),
+                QPointF fPoint;
+                VToolPointOfIntersectionCircles::FindPoint(static_cast<QPointF>(*first),
                                                            static_cast<QPointF>(*second),
-                                                                                  c1Radius, c2Radius, crossPoint);
+                                                           c1Radius, c2Radius, crossPoint, &fPoint);
                 DrawPoint(point, fPoint, mainColor);
             }
         }

src/libs/vtools/visualization/path/vistoolpointofintersectioncurves.cpp

@@ -72,8 +72,9 @@ void VisToolPointOfIntersectionCurves::RefreshGeometry()
             DrawPath(visCurve2, curve2->GetPath(), curve2->DirectionArrows(), supportColor, Qt::SolidLine,
                      Qt::RoundCap);
 
-            auto p = VToolPointOfIntersectionCurves::FindPoint(curve1->GetPoints(), curve2->GetPoints(), vCrossPoint,
+            QPointF p;
-                                                               hCrossPoint);
+            VToolPointOfIntersectionCurves::FindPoint(curve1->GetPoints(), curve2->GetPoints(), vCrossPoint,
+                                                      hCrossPoint, &p);
             DrawPoint(point, p, mainColor);
         }
     }

src/test/ValentinaTest/tst_findpoint.cpp

@@ -165,9 +165,10 @@ void TST_FindPoint::TestPointOfIntersectionCurves()
     QFETCH(int, hCross);
     QFETCH(QPointF, expect);
 
-    const QPointF result = VToolPointOfIntersectionCurves::FindPoint(curve1Points, curve2Points,
+    QPointF result;
+    VToolPointOfIntersectionCurves::FindPoint(curve1Points, curve2Points,
                                               static_cast<VCrossCurvesPoint>(vCross),
-                                                                     static_cast<HCrossCurvesPoint>(hCross));
+                                              static_cast<HCrossCurvesPoint>(hCross), &result);
     QCOMPARE(result.toPoint(), expect.toPoint());
 }