+Handle(Prs3d_DimensionAspect) createDimensionAspect()
+{
+ Handle(Prs3d_DimensionAspect) anAspect = new Prs3d_DimensionAspect();
+ anAspect->MakeArrows3d(false);
+ anAspect->MakeText3d(false);
+ anAspect->MakeTextShaded(false);
+ anAspect->MakeUnitsDisplayed(false);
+ anAspect->TextAspect()->SetHeight(SketcherPrs_Tools::getDefaultTextHeight());
+ anAspect->ArrowAspect()->SetLength(SketcherPrs_Tools::getArrowSize());
+
+ return anAspect;
+}
+
+void updateArrows(Handle(Prs3d_DimensionAspect) theDimAspect, double theDimValue, double theTextSize)
+{
+ double anArrowLength = theDimAspect->ArrowAspect()->Length();
+ // This is not realy correct way to get viewer scale.
+ double aViewerScale = (double) SketcherPrs_Tools::getDefaultArrowSize() / anArrowLength;
+
+ if(theTextSize > ((theDimValue - 3 * SketcherPrs_Tools::getArrowSize()) * aViewerScale)) {
+ theDimAspect->SetTextHorizontalPosition(Prs3d_DTHP_Left);
+ theDimAspect->SetArrowOrientation(Prs3d_DAO_External);
+ theDimAspect->SetExtensionSize((theTextSize / aViewerScale + SketcherPrs_Tools::getArrowSize()) / 2.0);
+ } else {
+ theDimAspect->SetTextHorizontalPosition(Prs3d_DTHP_Center);
+ theDimAspect->SetArrowOrientation(Prs3d_DAO_Internal);
+ }
+ theDimAspect->SetArrowTailSize(theDimAspect->ArrowAspect()->Length());
+ // The value of vertical aligment is sometimes changed
+ theDimAspect->TextAspect()->SetVerticalJustification(Graphic3d_VTA_CENTER);
+}
+
+void sendEmptyPresentationError(ModelAPI_Feature* theFeature, const std::string theError)
+{
+ Events_InfoMessage("SketcherPrs_Tools", "An empty AIS presentation: SketcherPrs_LengthDimension").send();
+ static const Events_ID anEvent = Events_Loop::eventByName(EVENT_EMPTY_AIS_PRESENTATION);
+ std::shared_ptr<ModelAPI_Object> aConstraintPtr(theFeature);
+ ModelAPI_EventCreator::get()->sendUpdated(aConstraintPtr, anEvent);
+}