Measure: Fix delta label text size scaling (#21467)

* Measure: Fix delta label font size

- Add font size field to ViewProviderMeasureBase which connects to other fields
- Remove dead code in DimensionLinear which internally is using FrameLabel
- Connect FrameLabels's fontsize property to DimensionLinear's property

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

src/Mod/Measure/Gui/ViewProviderMeasureBase.cpp

@@ -194,6 +194,7 @@ ViewProviderMeasureBase::ViewProviderMeasureBase()
     TextBackgroundColor.touch();
     FontSize.touch();
     LineColor.touch();
+    fieldFontSize.setValue(FontSize.getValue());
 }
 
 ViewProviderMeasureBase::~ViewProviderMeasureBase()
@@ -251,6 +252,7 @@ void ViewProviderMeasureBase::onChanged(const App::Property* prop)
     }
     else if (prop == &FontSize) {
         pLabel->size = FontSize.getValue();
+        fieldFontSize.setValue(FontSize.getValue());
     }
     ViewProviderDocumentObject::onChanged(prop);
 }

src/Mod/Measure/Gui/ViewProviderMeasureBase.h

@@ -88,6 +88,9 @@ public:
     App::PropertyInteger FontSize;
     // NOLINTEND
 
+    // Fields
+    SoSFFloat fieldFontSize;
+
     /**
      * Attaches the document object to this view provider.
      */

src/Mod/Measure/Gui/ViewProviderMeasureDistance.cpp

@@ -212,16 +212,13 @@ void MeasureGui::DimensionLinear::setupDimension()
     textTransform->translation.connectFrom(&textVecCalc->oA);
     textSep->addChild(textTransform);
 
-    SoFont* fontNode = new SoFont();
-    fontNode->name.setValue("Helvetica : Bold");
-    fontNode->size.connectFrom(&fontSize);
-    textSep->addChild(fontNode);
-
     auto textNode = new SoFrameLabel();
     textNode->justification = SoText2::CENTER;
     textNode->string.connectFrom(&text);
     textNode->textColor.connectFrom(&dColor);
     textNode->backgroundColor.connectFrom(&backgroundColor);
+    textNode->size.connectFrom(&fontSize);
+    textNode->name.setValue("Helvetica");
     textSep->addChild(textNode);
 
     // this prevents the 2d text from screwing up the bounding box for a viewall
@@ -416,18 +413,21 @@ ViewProviderMeasureDistance::ViewProviderMeasureDistance()
     dimDeltaX->point2.connectFrom(&composeVecDelta1->vector);
     dimDeltaX->setupDimension();
     dimDeltaX->dColor.setValue(colorX);
+    dimDeltaX->fontSize.connectFrom(&fieldFontSize);
 
     auto dimDeltaY = new MeasureGui::DimensionLinear();
     dimDeltaY->point1.connectFrom(&composeVecDelta1->vector);
     dimDeltaY->point2.connectFrom(&composeVecDelta2->vector);
     dimDeltaY->setupDimension();
     dimDeltaY->dColor.setValue(colorY);
+    dimDeltaY->fontSize.connectFrom(&fieldFontSize);
 
     auto dimDeltaZ = new MeasureGui::DimensionLinear();
     dimDeltaZ->point2.connectFrom(&composeVecDelta2->vector);
     dimDeltaZ->point1.connectFrom(&fieldPosition2);
     dimDeltaZ->setupDimension();
     dimDeltaZ->dColor.setValue(colorZ);
+    dimDeltaZ->fontSize.connectFrom(&fieldFontSize);
 
     pDeltaDimensionSwitch = new SoSwitch();
     pDeltaDimensionSwitch->ref();
@@ -507,14 +507,6 @@ void ViewProviderMeasureDistance::onChanged(const App::Property* prop)
         pDeltaDimensionSwitch->whichChild.setValue(ShowDelta.getValue() ? SO_SWITCH_ALL
                                                                         : SO_SWITCH_NONE);
     }
-    else if (prop == &FontSize) {
-        static_cast<DimensionLinear*>(pDeltaDimensionSwitch->getChild(0))
-            ->fontSize.setValue(FontSize.getValue());
-        static_cast<DimensionLinear*>(pDeltaDimensionSwitch->getChild(1))
-            ->fontSize.setValue(FontSize.getValue());
-        static_cast<DimensionLinear*>(pDeltaDimensionSwitch->getChild(2))
-            ->fontSize.setValue(FontSize.getValue());
-    }
     else if (prop == &TextBackgroundColor) {
         auto bColor = TextBackgroundColor.getValue();
         static_cast<DimensionLinear*>(pDeltaDimensionSwitch->getChild(0))