backport linewidth feature to qt < 5.7, as per OpenFlipper-Free!161

OpenMesh/OMPropertyVisualizerVector2T.cc

@@ -71,7 +71,8 @@ OMPropertyVisualizerVector2<MeshT, VectorType>::OMPropertyVisualizerVector2(Mesh
     {
         w->vectors_edges_rb->hide();
     }
-    this->connect(w->lineWidth, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
+    // starting with Qt 5.7, use QOverload<double>::of(&QDoubleSpinBox::valueChanged)
+    this->connect(w->lineWidth, static_cast<void (QDoubleSpinBox::*)(double)>(&QDoubleSpinBox::valueChanged),
                   [this](double value) {lineNode->set_line_width(value);});
 }
 

OpenMesh/OMPropertyVisualizerVectorT.cc

@@ -70,7 +70,8 @@ OMPropertyVisualizerVector<MeshT>::OMPropertyVisualizerVector(MeshT* _mesh, int
     {
         w->vectors_edges_rb->hide();
     }
-    this->connect(w->lineWidth, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
+    // starting with Qt 5.7, use QOverload<double>::of(&QDoubleSpinBox::valueChanged)
+    this->connect(w->lineWidth, static_cast<void (QDoubleSpinBox::*)(double)>(&QDoubleSpinBox::valueChanged),
                   [this](double value) {lineNode->set_line_width(value);});
 }
 

OpenVolumeMesh/OVMPropertyVisualizerVectorT.cc

@@ -67,7 +67,9 @@ OVMPropertyVisualizerVector<MeshT>::OVMPropertyVisualizerVector(MeshT* _mesh, in
     PluginFunctions::getObject(objectID, bod);
     lineNode = new ACG::SceneGraph::LineNode(ACG::SceneGraph::LineNode::LineSegmentsMode, bod->baseNode());
     w->vectors_edges_rb->hide();
-    this->connect(w->lineWidth, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
+
+    // starting with Qt 5.7, use QOverload<double>::of(&QDoubleSpinBox::valueChanged)
+    this->connect(w->lineWidth, static_cast<void (QDoubleSpinBox::*)(double)>(&QDoubleSpinBox::valueChanged),
                   [this](double value) {lineNode->set_line_width(value);});
 }