From 84fcca22936c9268918d4f61a1dbc63990b04e3a Mon Sep 17 00:00:00 2001
From: Howard-C <howardc@pku.edu.cn>
Date: Thu, 26 Mar 2020 11:05:50 +0800
Subject: [PATCH] Add the ability to close score tab by clicking middle button

---
 mscore/scoretab.cpp | 29 +++++++++++++++++++++++++++--
 mscore/scoretab.h   | 21 ++++++++++++++++++---
 2 files changed, 45 insertions(+), 5 deletions(-)

diff --git a/mscore/scoretab.cpp b/mscore/scoretab.cpp
index 39a6279734f10..8b1b3a4e70306 100644
--- a/mscore/scoretab.cpp
+++ b/mscore/scoretab.cpp
@@ -42,6 +42,31 @@
 
 namespace Ms {
 
+//---------------------------------------------------------
+//   MsTabBar::mousePressEvent
+//---------------------------------------------------------
+
+void MsTabBar::mousePressEvent(QMouseEvent* e)
+      {
+      QTabBar::mousePressEvent(e);
+      if (e->button() == Qt::MiddleButton)
+            _middleClickedTab = tabAt(e->pos());
+      }
+
+//---------------------------------------------------------
+//   MsTabBar::mouseReleaseEvent
+//---------------------------------------------------------
+
+void MsTabBar::mouseReleaseEvent(QMouseEvent* e)
+      {
+      QTabBar::mouseReleaseEvent(e);
+      if (e->button() == Qt::MiddleButton) {
+            if (tabAt(e->pos()) == _middleClickedTab)
+                  emit tabCloseRequested(_middleClickedTab);
+            _middleClickedTab = -1; // reset
+            }
+      }
+
 //---------------------------------------------------------
 //   ScoreTab
 //---------------------------------------------------------
@@ -64,7 +89,7 @@ ScoreTab::ScoreTab(QList<MasterScore*>* sl, QWidget* parent)
 
       connect(ag, SIGNAL(triggered(QAction*)), this, SIGNAL(actionTriggered(QAction*)));
 
-      tab = new QTabBar(this);
+      tab = new MsTabBar(this);
       tab->setObjectName("primarytab");
       tab->setAccessibleName("");
       tab->setExpanding(false);
@@ -73,7 +98,7 @@ ScoreTab::ScoreTab(QList<MasterScore*>* sl, QWidget* parent)
       tab->setTabsClosable(true);
       tab->setMovable(true);
 
-      tab2 = new QTabBar(this);
+      tab2 = new MsTabBar(this);
       tab2->setObjectName("secondarytab");
       tab2->setAccessibleName("");
       tab2->setExpanding(false);
diff --git a/mscore/scoretab.h b/mscore/scoretab.h
index 8083cf4bffc30..a896183a8006d 100644
--- a/mscore/scoretab.h
+++ b/mscore/scoretab.h
@@ -40,6 +40,21 @@ struct TabScoreView {
             }
       };
 
+//---------------------------------------------------------
+//   MsTabBar
+//---------------------------------------------------------
+
+class MsTabBar : public QTabBar {
+      int _middleClickedTab { -1 };
+
+   public:
+      MsTabBar(QWidget* parent = nullptr) : QTabBar(parent) {}
+
+   private:
+      void mousePressEvent(QMouseEvent* e) override;
+      void mouseReleaseEvent(QMouseEvent* e) override;
+      };
+
 //---------------------------------------------------------
 //   ScoreTab
 //---------------------------------------------------------
@@ -47,8 +62,8 @@ struct TabScoreView {
 class ScoreTab : public QWidget {
       Q_OBJECT
       QList<MasterScore*>* scoreList { nullptr };
-      QTabBar* tab  { nullptr };                 // list of scores
-      QTabBar* tab2 { nullptr };                 // list of excerpts for current score
+      MsTabBar* tab  { nullptr };                 // list of scores
+      MsTabBar* tab2 { nullptr };                 // list of excerpts for current score
       QStackedLayout* stack { nullptr };
       MuseScore* mainWindow { nullptr };;
       void clearTab2();
@@ -75,7 +90,7 @@ class ScoreTab : public QWidget {
       ScoreTab(QList<MasterScore*>*, QWidget* parent = 0);
       ~ScoreTab();
 
-      QTabBar* getTab() const { return tab; }
+      MsTabBar* getTab() const { return tab; }
 
       void insertTab(MasterScore*);
       void setTabText(int, const QString&);