From 321e9215d492e55a83ccd56c152d7bcf2095e693 Mon Sep 17 00:00:00 2001
From: Abdullah Tahiri <abdullah.tahiri.yo@gmail.com>
Date: Sun, 16 Jun 2019 12:12:14 +0200
Subject: [PATCH] PartDesign: Extend Datums ViewProvider to overlay attachment
 status

---
 src/Mod/PartDesign/Gui/ViewProviderDatum.cpp | 51 ++++++++++++++++++--
 src/Mod/PartDesign/Gui/ViewProviderDatum.h   |  8 +--
 2 files changed, 53 insertions(+), 6 deletions(-)

diff --git a/src/Mod/PartDesign/Gui/ViewProviderDatum.cpp b/src/Mod/PartDesign/Gui/ViewProviderDatum.cpp
index 747e5b64e5..be294dc156 100644
--- a/src/Mod/PartDesign/Gui/ViewProviderDatum.cpp
+++ b/src/Mod/PartDesign/Gui/ViewProviderDatum.cpp
@@ -24,6 +24,7 @@
 #include "PreCompiled.h"
 
 #ifndef _PreComp_
+# include <QApplication>
 # include <QMessageBox>
 # include <QAction>
 # include <QMenu>
@@ -61,6 +62,7 @@
 #include <Gui/ViewProviderOrigin.h>
 #include <Gui/View3DInventor.h>
 #include <Gui/View3DInventorViewer.h>
+#include <Gui/BitmapFactory.h>
 
 #include <Mod/PartDesign/App/DatumPoint.h>
 #include <Mod/PartDesign/App/DatumLine.h>
@@ -282,11 +284,11 @@ bool ViewProviderDatum::doubleClicked(void)
     std::string Msg("Edit ");
     Msg += this->pcObject->Label.getValue();
     Gui::Command::openCommand(Msg.c_str());
-    
+
     Part::Datum* pcDatum = static_cast<Part::Datum*>(getObject());
     PartDesign::Body* activeBody = getActiveView()->getActiveObject<PartDesign::Body*>(PDBODYKEY);
     auto datumBody = PartDesignGui::getBodyFor(pcDatum, false);
-    
+
     if (datumBody != NULL) {
         if (datumBody != activeBody) {
             Gui::Command::doCommand(Gui::Command::Gui,
@@ -339,7 +341,7 @@ SbBox3f ViewProviderDatum::getRelevantBoundBox () const {
 
         if(group) {
             auto* ext = group->getExtensionByType<App::GroupExtension>();
-            if(ext) 
+            if(ext)
                 objs = ext->getObjects ();
         } else {
             // Fallback to whole document
@@ -409,3 +411,46 @@ void ViewProviderDatum::setPickable(bool val) {
     else
         pPickStyle->style = SoPickStyle::UNPICKABLE;
 }
+
+QIcon ViewProviderDatum::mergeOverlayIcons (const QIcon & orig) const
+{
+    QIcon mergedicon = orig;
+
+    if (getObject()->hasExtension(Part::AttachExtension::getExtensionClassTypeId())) {
+
+        bool attached = false;
+
+        try{
+            attached = getObject()->getExtensionByType<Part::AttachExtension>()->positionBySupport();
+        }
+        catch (...) { // We are just trying to get an icon, if no placement can be calculated, set unattached.
+            // set unattached
+        }
+
+        if(!attached) {
+            QPixmap px;
+
+            static const char * const feature_detached_xpm[]={
+                "9 9 3 1",
+                ". c None",
+                "# c #cc00cc",
+                "a c #ffffff",
+                "...###...",
+                ".##aaa##.",
+                "##aaaaa##",
+                "##aaaaa##",
+                ".##aaa##.",
+                "...###...",
+                "...###...",
+                "....#....",
+                "....#....",
+                "....#...."};
+
+                px = QPixmap(feature_detached_xpm);
+
+                mergedicon = mergePixmap(mergedicon, px, Gui::BitmapFactoryInst::BottomLeft);
+        }
+    }
+
+    return mergedicon;
+}
diff --git a/src/Mod/PartDesign/Gui/ViewProviderDatum.h b/src/Mod/PartDesign/Gui/ViewProviderDatum.h
index 98854b940b..c0d811f17e 100644
--- a/src/Mod/PartDesign/Gui/ViewProviderDatum.h
+++ b/src/Mod/PartDesign/Gui/ViewProviderDatum.h
@@ -60,14 +60,14 @@ public:
     virtual std::string getElement(const SoDetail *) const;
     virtual SoDetail* getDetail(const char*) const;
 
-    /** 
+    /**
      * Enable/Disable the selectability of the datum
-     * This differs from the normal ViewProvider selectability in that, that with this enabled one 
+     * This differs from the normal ViewProvider selectability in that, that with this enabled one
      * can pick through the datum and select stuff behind it.
      */
     bool isPickable();
     void setPickable(bool val);
-    
+
     /**
      * Update the visual size to match the given extents
      * @note should be reimplemented in the offspings
@@ -124,6 +124,8 @@ protected:
     // Get the separator to fill with datum content
     SoSeparator *getShapeRoot () { return pShapeSep; }
 
+    virtual QIcon mergeOverlayIcons (const QIcon & orig) const override;
+
 private:
     SoSeparator* pShapeSep;
     SoPickStyle* pPickStyle;