From 069db44e0ccb50283e3470a603752264c68fc2d3 Mon Sep 17 00:00:00 2001
From: ws <ws@wschweer.de>
Date: Thu, 21 Apr 2016 14:17:18 +0200
Subject: [PATCH] fix #106851: changing pitch on percussion staff crashes
 MuseScore

---
 libmscore/chord.cpp     | 29 ++++++++++++++++++-----------
 libmscore/measure.cpp   |  4 ++--
 mscore/debugger/note.ui |  4 ++--
 3 files changed, 22 insertions(+), 15 deletions(-)

diff --git a/libmscore/chord.cpp b/libmscore/chord.cpp
index 1e1f2213dc67f..bd4ce63d9c536 100644
--- a/libmscore/chord.cpp
+++ b/libmscore/chord.cpp
@@ -1603,8 +1603,9 @@ void Chord::cmdUpdateNotes(AccidentalState* as)
             }
 
       std::vector<Note*> lnotes(notes());  // we need a copy!
-      for (Note* note : lnotes) {
-            if (staffGroup == StaffGroup::STANDARD) {
+
+      if (staffGroup == StaffGroup::STANDARD) {
+            for (Note* note : lnotes) {
                   if (note->tieBack()) {
                         if (note->accidental() && note->tpc() == note->tieBack()->startNote()->tpc()) {
                               // TODO: remove accidental only if note is not
@@ -1614,19 +1615,25 @@ void Chord::cmdUpdateNotes(AccidentalState* as)
                         }
                   note->updateAccidental(as);
                   }
-            else if (staffGroup == StaffGroup::PERCUSSION) {
-                  const Instrument* instrument = part()->instrument();
-                  const Drumset* drumset = instrument->drumset();
-                  int pitch = note->pitch();
-                  if (drumset) {
+            }
+      else if (staffGroup == StaffGroup::PERCUSSION) {
+            const Instrument* instrument = part()->instrument();
+            const Drumset* drumset = instrument->drumset();
+            if (!drumset)
+                  qWarning("no drumset");
+            for (Note* note : lnotes) {
+                  if (!drumset)
+                        note->setLine(0);
+                  else {
+                        int pitch = note->pitch();
                         if (!drumset->isValid(pitch)) {
-                              // qDebug("unmapped drum note %d", pitch);
+                              note->setLine(0);
+                              qWarning("unmapped drum note %d", pitch);
                               }
                         else if (!note->fixed()) {
                               note->undoChangeProperty(P_ID::HEAD_GROUP, int(drumset->noteHead(pitch)));
-                             // note->setHeadGroup(drumset->noteHead(pitch));
+                              // note->setHeadGroup(drumset->noteHead(pitch));
                               note->setLine(drumset->line(pitch));
-                              continue;
                               }
                         }
                   }
@@ -1704,7 +1711,7 @@ void Chord::layoutPitched()
             c->layoutPitched();
 
       qreal _spatium         = spatium();
-      qreal _mag             = staff()->mag();
+      qreal _mag             = staff() ? staff()->mag() : 1.0;    // palette elements do not have a staff
       qreal dotNoteDistance  = score()->styleP(StyleIdx::dotNoteDistance)  * _mag;
       qreal minNoteDistance  = score()->styleP(StyleIdx::minNoteDistance)  * _mag;
       qreal minTieLength     = score()->styleP(StyleIdx::MinTieLength)     * _mag;
diff --git a/libmscore/measure.cpp b/libmscore/measure.cpp
index cc224db1eefc6..eac190463b9d2 100644
--- a/libmscore/measure.cpp
+++ b/libmscore/measure.cpp
@@ -2855,8 +2855,8 @@ void Measure::layoutCR0(ChordRest* cr, qreal mm, AccidentalState* as)
       if (cr->small())
             m *= score()->styleD(StyleIdx::smallNoteMag);
 
-      if (cr->type() == Element::Type::CHORD) {
-            Chord* chord = static_cast<Chord*>(cr);
+      if (cr->isChord()) {
+            Chord* chord = toChord(cr);
             for (Chord* c : chord->graceNotes())
                   layoutCR0(c, mm, as);
             if (!chord->isGrace())
diff --git a/mscore/debugger/note.ui b/mscore/debugger/note.ui
index 2ee181699c901..48a51f3f427ae 100644
--- a/mscore/debugger/note.ui
+++ b/mscore/debugger/note.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>807</width>
-    <height>309</height>
+    <height>325</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -157,7 +157,7 @@
          <bool>true</bool>
         </property>
         <property name="minimum">
-         <number>-99</number>
+         <number>-9999</number>
         </property>
        </widget>
       </item>