[Measure] Add features, viewproviders and preferences for unified measurement facility

src/Mod/Measure/Gui/AppMeasureGui.cpp

@@ -0,0 +1,99 @@
+/***************************************************************************
+ *   Copyright (c) 2023 David Friedli <david[at]friedli-be.ch>             *
+ *                                                                         *
+ *   This file is part of FreeCAD.                                         *
+ *                                                                         *
+ *   FreeCAD is free software: you can redistribute it and/or modify it    *
+ *   under the terms of the GNU Lesser General Public License as           *
+ *   published by the Free Software Foundation, either version 2.1 of the  *
+ *   License, or (at your option) any later version.                       *
+ *                                                                         *
+ *   FreeCAD is distributed in the hope that it will be useful, but        *
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
+ *   Lesser General Public License for more details.                       *
+ *                                                                         *
+ *   You should have received a copy of the GNU Lesser General Public      *
+ *   License along with FreeCAD. If not, see                               *
+ *   <https://www.gnu.org/licenses/>.                                      *
+ *                                                                         *
+ **************************************************************************/
+
+#include "PreCompiled.h"
+
+#include <Base/Console.h>
+#include <Base/Interpreter.h>
+#include <Base/PyObjectBase.h>
+#include <Base/Tools.h>
+#include <Gui/Application.h>
+#include <Gui/Language/Translator.h>
+#include <Gui/WidgetFactory.h>
+
+#include "DlgPrefsMeasureAppearanceImp.h"
+#include "ViewProviderMeasureAngle.h"
+#include "ViewProviderMeasureDistance.h"
+#include "ViewProviderMeasureBase.h"
+
+
+// use a different name to CreateCommand()
+void CreateMeasureCommands();
+
+
+namespace MeasureGui
+{
+class Module: public Py::ExtensionModule<Module>
+{
+public:
+    Module()
+        : Py::ExtensionModule<Module>("MeasureGui")
+    {
+        initialize("This module is the MeasureGui module.");// register with Python
+    }
+
+    ~Module() override = default;
+
+private:
+};
+
+PyObject* initModule()
+{
+    return Base::Interpreter().addModule(new Module);
+}
+
+}// namespace MeasureGui
+
+/* Python entry */
+PyMOD_INIT_FUNC(MeasureGui)
+{
+    if (!Gui::Application::Instance) {
+        PyErr_SetString(PyExc_ImportError, "Cannot load Gui module in console application.");
+        PyMOD_Return(nullptr);
+    }
+    
+    // load dependent module
+    try {
+        Base::Interpreter().loadModule("Measure");
+    }
+    catch(const Base::Exception& e) {
+        PyErr_SetString(PyExc_ImportError, e.what());
+        PyMOD_Return(nullptr);
+    }
+
+    PyObject* mod = MeasureGui::initModule();
+    Base::Console().Log("Loading GUI of Measure module... done\n");
+
+    // instantiating the commands
+    CreateMeasureCommands();
+
+    MeasureGui::ViewProviderMeasureBase                ::init();
+    MeasureGui::ViewProviderMeasure        ::init();
+    MeasureGui::ViewProviderMeasureAngle               ::init();
+    MeasureGui::ViewProviderMeasureDistance            ::init();
+
+    // register preferences pages
+    new Gui::PrefPageProducer<MeasureGui::DlgPrefsMeasureAppearanceImp>(QT_TRANSLATE_NOOP("QObject", "Measure"));
+
+//    Q_INIT_RESOURCE(Measure);
+
+    PyMOD_Return(mod);
+}