Added note prompt for single note to point where to select note, when score is...

Added note prompt for single note to point where to select note, when score is cleared clear key signature as well, when exam starts - revert colors of note 2 and 3

src/libs/core/score/tscoreobject.cpp

@@ -787,8 +787,10 @@ void TscoreObject::deleteLastNote() {
 
 
 void TscoreObject::clearScore() {
-  if (notesCount() == 0)
-    return;
+  if (notesCount() == 0) {
+      setKeySignature(0);
+      return;
+    }
 
   if (m_singleNote) {
       setNote(note(0), Tnote());
@@ -804,6 +806,7 @@ void TscoreObject::clearScore() {
       setSelectedItem(nullptr);
       emit scoreWasCleared();
   }
+  setKeySignature(0);
 }
 
 

src/main/tmainscoreobject.cpp

@@ -230,6 +230,7 @@ void TmainScoreObject::isExamChangedSlot() {
           paletteSlot();
         }
       }
+      singleModeSlot();
   } else {
       m_scoreActions << m_playAct << m_recModeAct << m_openXmlAct << m_saveXmlAct << m_showNamesAct << m_extraAccidsAct
                     << m_zoomOutAct << m_zoomInAct << m_deleteLastAct << m_clearScoreAct;

src/nootka.qrc

@@ -46,6 +46,7 @@
     <file alias="Tie.qml">qml/score/Tie.qml</file>
     <file alias="AddLine.qml">qml/score/AddLine.qml</file>
     <file alias="NoteCursor.qml">qml/score/NoteCursor.qml</file>
+    <file alias="NotePrompt.qml">qml/score/NotePrompt.qml</file>
     <file alias="AccidControl.qml">qml/score/AccidControl.qml</file>
     <file alias="RhythmControl.qml">qml/score/RhythmControl.qml</file>
     <file alias="ControlButton.qml">qml/score/ControlButton.qml</file>

src/qml/MainScore.qml

@@ -92,6 +92,7 @@ Score {
 
   // private
   property var scordature: null
+  property var notePrompt: null
 
   Connections {
     target: SOUND
@@ -118,12 +119,20 @@ Score {
     }
     if (GLOB.tuning.scordature && GLOB.instrument.type !== Tinstrument.BassGuitar) {
         var c = Qt.createComponent("qrc:/Scordature.qml")
-        var scordature = c.createObject(firstStaff)
+        scordature = c.createObject(firstStaff)
         firstStaff.scordSpace = scordature.height
     } else
         firstStaff.scordSpace = 0
   }
 
+  onSingleNoteChanged: {
+    if (singleNote) {
+        var c = Qt.createComponent("qrc:/NotePrompt.qml")
+        notePrompt = c.createObject(scoreObj.note(0))
+    } else
+        notePrompt.destroy()
+  }
+
   Rectangle { // note highlight
     id: noteHighlight
     parent: currentNote

src/qml/score/NotePrompt.qml

+/** This file is part of Nootka (http://nootka.sf.net)               *
+ * Copyright (C) 2018 by Tomasz Bojczuk (seelook@gmail.com)          *
+ * on the terms of GNU GPLv3 license (http://www.gnu.org/licenses)   */
+
+import QtQuick 2.9
+
+import Score 1.0
+
+
+Text {
+  parent: scoreObj.note(0)
+  text: "n"
+  font { pixelSize: parent.width * 2.2; family: "Nootka" }
+  color: Noo.alpha(GLOB.isExam ? GLOB.correctColor : GLOB.noteCursorColor, 50)
+  x: (parent.width - width) / 2 - 0.5; y: score.upperLine - 1.6
+  visible: !scoreObj.readOnly && parent.notePosY === 0 && !(score.cursor && score.cursor.parent)
+}