[TD]Cosmetic function overhaul (#14216)

* [TD]Cosmetic geometry and tools update

- all cosmetics to store geometry in same form
- all cosmetics to survive scaling and rotation
- extension functions to survive scaling and rotation

* [TD]overhaul leader point storage and editing

- add py routine makeLeader(points)

* [TD]add leader conversion utility

* [TD]Set Leader RotateWithView default to true

* [TD]fix intersection vertex position

* [TD]add CosmeticEdge::makeLineFromCanonicalPoints

* [TD]fix 2 Extension tools

- positioning in DrawCosmeticCircle
- mishandling of points in execLineParallelPerpendicular

* [TD]Remove duplicate constexpr

* [TD]fix 2x Cosmetic arc tools

* [TD]refactor LineFormat out of Cosmetic

* [TD]move cosmetic appearance settings to LineFormat

* [TD]remove 2 unused methods

* [TD]apply format to blue line & circle tools

* [TD]fix ballon arrowhead does not rotate with view

* [TD]fix CosmeticCircle3Points

* [TD]allow multiple cosmetic object deletions

* [TD]fix extend/shorten centerline

src/Mod/TechDraw/Gui/DrawGuiUtil.cpp

@@ -69,9 +69,11 @@
 #include "MDIViewPage.h"
 #include "QGSPage.h"
 #include "ViewProviderPage.h"
+#include "Rez.h"
 
 using namespace TechDrawGui;
 using namespace TechDraw;
+using DU = DrawUtil;
 
 void DrawGuiUtil::loadArrowBox(QComboBox* qcb)
 {
@@ -569,3 +571,44 @@ void DrawGuiUtil::setSelectedTree(QGraphicsItem *item, bool selected)
         }
     }
 }
+
+
+//! convert point from scene coords to mm and conventional Y axis (page coords).
+Base::Vector3d DrawGuiUtil::fromSceneCoords(const Base::Vector3d& sceneCoord, bool invert)
+{
+    Base::Vector3d result;
+    if (invert) {
+        result = Rez::appX(DU::invertY(sceneCoord));
+    } else {
+        result = Rez::appX(sceneCoord);
+    }
+    return Rez::appX(DU::invertY(sceneCoord));
+}
+
+//! convert point from printed page coords to scene units (Rez(mm) and inverted Y axis (scene coords)
+Base::Vector3d DrawGuiUtil::toSceneCoords(const Base::Vector3d& pageCoord, bool invert)
+{
+    Base::Vector3d result;
+    if (invert) {
+        result = Rez::guiX(DU::invertY(pageCoord));
+    } else {
+        result = Rez::guiX(pageCoord);
+    }
+    return result;
+}
+
+//! convert unscaled, unrotated point to scaled, rotated view coordinates
+Base::Vector3d DrawGuiUtil::toGuiPoint(DrawView* obj, const Base::Vector3d& toConvert)
+{
+    Base::Vector3d result{toConvert};
+    auto rotDegrees = obj->Rotation.getValue();
+    if (rotDegrees != 0.0) {
+        result.RotateZ(Base::toRadians(rotDegrees));
+    }
+    result *= obj->getScale();
+    result = DU::invertY(result);
+    result = Rez::guiX(result);
+
+    return result;
+}
+