Measurement: Provide correct VP name for COM (#23329)

* Measurement: Provide correct VP name for COM

This patch tries to provide proper ViewProvider name for COM, which
results in a proper pixmap assignment, which won't fallback to the
default measurement's tool icon for COM.

Since MeasurePython runs before actual COM python proxy assignments,
we can't access proxy easily from this point of code.

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

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

* Measure: Use starts_with instead of find

Co-authored-by: Chris Hennes <chennes@pioneerlibrarysystem.org>

* Update src/Mod/Measure/App/MeasureBase.cpp

---------

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

src/Mod/Measure/App/MeasureBase.cpp

@@ -209,6 +209,18 @@ PROPERTY_SOURCE_TEMPLATE(Measure::MeasurePython, Measure::MeasureBase)
 template<>
 const char* Measure::MeasurePython::getViewProviderName(void) const
 {
+    std::string objName = this->getNameInDocument();
+
+    // check object's name, this is brute-forceish way to determine
+    // VP name for COM, but at this point python assignments haven't
+    // been run, so we have no way to determine that easily
+    if (objName.starts_with("Center_of_mass")
+
+        || objName.find("CenterOfMass") != std::string::npos
+        || objName.find("centerofmass") != std::string::npos) {
+        return "MeasureGui::ViewProviderMeasureCOM";
+    }
+
     return "MeasureGui::ViewProviderMeasure";
 }
 template<>

src/Mod/Measure/Gui/AppMeasureGui.cpp

@@ -101,6 +101,7 @@ PyMOD_INIT_FUNC(MeasureGui)
     MeasureGui::ViewProviderMeasureLength              ::init();
     MeasureGui::ViewProviderMeasurePosition            ::init();
     MeasureGui::ViewProviderMeasureRadius              ::init();
+    MeasureGui::ViewProviderMeasureCOM                 ::init();
     // clang-format on
 
     // register preferences pages

src/Mod/Measure/Gui/ViewProviderMeasureBase.cpp

@@ -733,3 +733,4 @@ PROPERTY_SOURCE(MeasureGui::ViewProviderMeasureArea, MeasureGui::ViewProviderMea
 PROPERTY_SOURCE(MeasureGui::ViewProviderMeasureLength, MeasureGui::ViewProviderMeasure)
 PROPERTY_SOURCE(MeasureGui::ViewProviderMeasurePosition, MeasureGui::ViewProviderMeasure)
 PROPERTY_SOURCE(MeasureGui::ViewProviderMeasureRadius, MeasureGui::ViewProviderMeasure)
+PROPERTY_SOURCE(MeasureGui::ViewProviderMeasureCOM, MeasureGui::ViewProviderMeasure)

src/Mod/Measure/Gui/ViewProviderMeasureBase.h

@@ -241,6 +241,17 @@ public:
     }
 };
 
+class ViewProviderMeasureCOM: public ViewProviderMeasure
+{
+    PROPERTY_HEADER(MeasureGui::ViewProviderMeasureCOM);
+
+public:
+    ViewProviderMeasureCOM()
+    {
+        sPixmap = "Measurement-CenterOfMass";
+    }
+};
+
 
 }  // namespace MeasureGui