fix #29931

Author: wschweer

libmscore/keysig.cpp

@@ -246,7 +246,6 @@ void KeySig::layout()
             }
 
       // compute bbox
-      setbbox(QRectF());
       for (KeySym& ks : keySymbols) {
             ks.pos = ks.spos * _spatium;
             addbbox(symBbox(ks.sym).translated(ks.pos));
@@ -334,7 +333,7 @@ void KeySig::write(Xml& xml) const
             xml.tag("custom", _sig.customType());
             for (const KeySym& ks: keySymbols) {
                   xml.stag("KeySym");
-                  xml.tag("sym", int(ks.sym));
+                  xml.tag("sym", Sym::id2name(ks.sym));
                   xml.tag("pos", ks.spos);
                   xml.etag();
                   }
@@ -362,8 +361,14 @@ void KeySig::read(XmlReader& e)
                   KeySym ks;
                   while (e.readNextStartElement()) {
                         const QStringRef& tag(e.name());
-                        if (tag == "sym")
-                              ks.sym = SymId(e.readInt());
+                        if (tag == "sym") {
+                              QString val(e.readElementText());
+                              bool valid;
+                              SymId id = SymId(val.toInt(&valid));
+                              if (!valid)
+                                    id = Sym::name2id(val);
+                              ks.sym = id;
+                              }
                         else if (tag == "pos")
                               ks.spos = e.readPoint();
                         else

libmscore/layout.cpp

@@ -1525,7 +1525,8 @@ void Score::addSystemHeader(Measure* m, bool isFirstSystem)
                   switch (el->type()) {
                         case Element::Type::KEYSIG:
                               keysig = static_cast<KeySig*>(el);
-                              keysig->changeKeySigEvent(keyIdx);
+                              if (!keysig->isCustom())
+                                    keysig->changeKeySigEvent(keyIdx);
                               break;
                         case Element::Type::CLEF:
                               clef = static_cast<Clef*>(el);
@@ -1554,7 +1555,7 @@ void Score::addSystemHeader(Measure* m, bool isFirstSystem)
                   }
             else if (!needKeysig && keysig)
                   undoRemoveElement(keysig);
-            else if (keysig && keysig->keySigEvent() != keyIdx)
+            else if (keysig && !keysig->isCustom() && keysig->keySigEvent() != keyIdx)
                   undo(new ChangeKeySig(keysig, keyIdx, keysig->showCourtesy()));
 
             bool needClef = isFirstSystem || styleB(StyleIdx::genClef);

libmscore/measure.cpp

@@ -2085,7 +2085,7 @@ void Measure::read(XmlReader& e, int staffIdx)
                   ks->setTrack(e.track());
                   ks->read(e);
                   int curTick = e.tick();
-                  if (ks->key() == Key::C && curTick == 0) {
+                  if (!ks->isCustom() && ks->key() == Key::C && curTick == 0) {
                         // ignore empty key signature
                         qDebug("remove keysig c at tick 0");
                         delete ks;

mscore/debugger/debugger.cpp

@@ -2467,11 +2467,12 @@ void KeySigView::setElement(Element* e)
       KeySig* ks = static_cast<KeySig*>(e);
       ShowElementBase::setElement(e);
 
+      KeySigEvent ev = ks->keySigEvent();
       keysig.showCourtesySig->setChecked(ks->showCourtesy());
-      keysig.accidentalType->setValue(int(ks->keySigEvent().key()));
-      keysig.customType->setValue(ks->keySigEvent().customType());
-      keysig.custom->setChecked(ks->keySigEvent().custom());
-      keysig.invalid->setChecked(ks->keySigEvent().invalid());
+      keysig.accidentalType->setValue(int(ev.key()));
+      keysig.customType->setValue(ev.customType());
+      keysig.custom->setChecked(ev.custom());
+      keysig.invalid->setChecked(ev.invalid());
       }
 
 //---------------------------------------------------------