+ fixes #0001517: Problem with constraint menu not displaying properly if moved (overwrites the background)

src/Mod/Sketcher/Gui/EditDatumDialog.cpp

@@ -62,12 +62,10 @@ EditDatumDialog::EditDatumDialog(Sketcher::SketchObject* pcSketch, int ConstrNbr
 
 EditDatumDialog::~EditDatumDialog(){}
 
-void EditDatumDialog::run(void * data, SoSensor * sensor)
+void EditDatumDialog::customEvent(QEvent*)
 {
-    EditDatumDialog* self = reinterpret_cast<EditDatumDialog*>(data);
-    self->exec();
-    delete self;
-    delete sensor;
+    this->exec();
+    this->deleteLater();
 }
 
 void EditDatumDialog::exec(bool atCursor)

src/Mod/Sketcher/Gui/EditDatumDialog.h

@@ -22,7 +22,7 @@
 #ifndef SKETCHERGUI_EditDatumDialog_H
 #define SKETCHERGUI_EditDatumDialog_H
 
-class SoSensor;
+#include <QObject>
 
 namespace Sketcher {
 class Constraint;
@@ -32,15 +32,15 @@ class SketchObject;
 namespace SketcherGui {
 class ViewProviderSketch;
 
-class EditDatumDialog {
+class EditDatumDialog : public QObject {
     Q_DECLARE_TR_FUNCTIONS(SketcherGui::EditDatumDialog)
 public:
     EditDatumDialog(ViewProviderSketch* vp, int ConstrNbr);
     EditDatumDialog(Sketcher::SketchObject* pcSketch, int ConstrNbr);
     ~EditDatumDialog();
 
-    static void run(void * data, SoSensor * sensor);   
     void exec(bool atCursor=true);
+    void customEvent(QEvent*);
 
 private:
     Sketcher::SketchObject* sketch;

src/Mod/Sketcher/Gui/ViewProviderSketch.cpp

@@ -52,7 +52,6 @@
 # include <Inventor/nodes/SoText2.h>
 # include <Inventor/nodes/SoFont.h>
 # include <Inventor/nodes/SoPickStyle.h>
-# include <Inventor/sensors/SoIdleSensor.h>
 # include <Inventor/nodes/SoCamera.h>
 
 /// Qt Include Files
@@ -876,9 +875,9 @@ void ViewProviderSketch::editDoubleClicked(void)
             Constr->Type == Sketcher::DistanceX || Constr->Type == Sketcher::DistanceY ||
             Constr->Type == Sketcher::Radius || Constr->Type == Sketcher::Angle) {
 
+            // Coin's SoIdleSensor causes problems on some platform while Qt seems to work properly (#0001517)
             EditDatumDialog * editDatumDialog = new EditDatumDialog(this, edit->PreselectConstraint);
-            SoIdleSensor* sensor = new SoIdleSensor(EditDatumDialog::run, editDatumDialog);
-            sensor->schedule();
+            QCoreApplication::postEvent(editDatumDialog, new QEvent(QEvent::User));
             edit->editDatumDialog = true; // avoid to double handle "ESC"
         }
     }