From 18b7cc28702aa4bca1b6566eb93f65d8b5d273f2 Mon Sep 17 00:00:00 2001
From: David Sansome <davidsansome@gmail.com>
Date: Fri, 25 Dec 2009 16:12:07 +0000
Subject: [PATCH] Right click on playlist column headers to hide and show them

---
 src/playlistheader.cpp | 62 ++++++++++++++++++++++++++++++++++++++++++
 src/playlistheader.h   | 34 +++++++++++++++++++++++
 src/playlistview.cpp   |  3 ++
 src/src.pro            |  6 ++--
 4 files changed, 103 insertions(+), 2 deletions(-)
 create mode 100644 src/playlistheader.cpp
 create mode 100644 src/playlistheader.h

diff --git a/src/playlistheader.cpp b/src/playlistheader.cpp
new file mode 100644
index 000000000..64d18c407
--- /dev/null
+++ b/src/playlistheader.cpp
@@ -0,0 +1,62 @@
+#include "playlistheader.h"
+
+#include <QtDebug>
+#include <QContextMenuEvent>
+#include <QMenu>
+#include <QSignalMapper>
+
+PlaylistHeader::PlaylistHeader(Qt::Orientation orientation, QWidget* parent)
+    : QHeaderView(orientation, parent),
+      menu_(new QMenu(this)),
+      show_menu_(new QMenu(this)),
+      show_mapper_(new QSignalMapper(this))
+{
+  hide_action_ = menu_->addAction("Hide...", this, SLOT(HideCurrent()));
+  QAction* show_action = menu_->addAction("Show section");
+  show_action->setMenu(show_menu_);
+
+  connect(show_mapper_, SIGNAL(mapped(int)), SLOT(ToggleVisible(int)));
+}
+
+void PlaylistHeader::contextMenuEvent(QContextMenuEvent* e) {
+  menu_section_ = logicalIndexAt(e->pos());
+
+  if (menu_section_ == -1)
+    hide_action_->setVisible(false);
+  else {
+    hide_action_->setVisible(true);
+
+    QString title(model()->headerData(menu_section_, Qt::Horizontal).toString());
+    hide_action_->setText("Hide " + title);
+  }
+
+  show_menu_->clear();
+  for (int i=0 ; i<model()->columnCount() ; ++i) {
+    AddColumnAction(i);
+  }
+
+  menu_->popup(e->globalPos());
+}
+
+void PlaylistHeader::AddColumnAction(int index) {
+  QString title(model()->headerData(index, Qt::Horizontal).toString());
+
+  QAction* action = show_menu_->addAction(title, show_mapper_, SLOT(map()));
+  action->setCheckable(true);
+  action->setChecked(!isSectionHidden(index));
+
+  show_mapper_->setMapping(action, index);
+}
+
+void PlaylistHeader::HideCurrent() {
+  if (menu_section_ == -1)
+    return;
+
+  setSectionHidden(menu_section_, true);
+}
+
+void PlaylistHeader::ToggleVisible(int section) {
+  setSectionHidden(section, !isSectionHidden(section));
+}
+
+
diff --git a/src/playlistheader.h b/src/playlistheader.h
new file mode 100644
index 000000000..955923e8f
--- /dev/null
+++ b/src/playlistheader.h
@@ -0,0 +1,34 @@
+#ifndef PLAYLISTHEADER_H
+#define PLAYLISTHEADER_H
+
+#include <QHeaderView>
+
+class QMenu;
+class QSignalMapper;
+
+class PlaylistHeader : public QHeaderView {
+  Q_OBJECT
+
+ public:
+  PlaylistHeader(Qt::Orientation orientation, QWidget* parent = 0);
+
+  // QWidget
+  void contextMenuEvent(QContextMenuEvent* e);
+
+ private slots:
+  void HideCurrent();
+  void ToggleVisible(int section);
+
+ private:
+  void AddColumnAction(int index);
+
+ private:
+  int menu_section_;
+  QMenu* menu_;
+  QAction* hide_action_;
+  QMenu* show_menu_;
+
+  QSignalMapper* show_mapper_;
+};
+
+#endif // PLAYLISTHEADER_H
diff --git a/src/playlistview.cpp b/src/playlistview.cpp
index 07fcda107..688b20039 100644
--- a/src/playlistview.cpp
+++ b/src/playlistview.cpp
@@ -1,5 +1,6 @@
 #include "playlistview.h"
 #include "playlist.h"
+#include "playlistheader.h"
 
 #include <QPainter>
 #include <QHeaderView>
@@ -101,6 +102,8 @@ PlaylistView::PlaylistView(QWidget *parent)
 {
   setItemDelegate(new PlaylistDelegateBase(this));
   setItemDelegateForColumn(Playlist::Column_Length, new LengthItemDelegate(this));
+
+  setHeader(new PlaylistHeader(Qt::Horizontal, this));
   header()->setMovable(true);
 
   connect(header(), SIGNAL(sectionResized(int,int,int)), SLOT(SaveGeometry()));
diff --git a/src/src.pro b/src/src.pro
index 41fba5f0a..66ce74cd8 100644
--- a/src/src.pro
+++ b/src/src.pro
@@ -32,7 +32,8 @@ SOURCES += main.cpp \
     systemtrayicon.cpp \
     libraryquery.cpp \
     fileview.cpp \
-    fileviewlist.cpp
+    fileviewlist.cpp \
+    playlistheader.cpp
 HEADERS += mainwindow.h \
     player.h \
     library.h \
@@ -61,7 +62,8 @@ HEADERS += mainwindow.h \
     systemtrayicon.h \
     libraryquery.h \
     fileview.h \
-    fileviewlist.h
+    fileviewlist.h \
+    playlistheader.h
 FORMS += mainwindow.ui \
     libraryconfig.ui \
     fileview.ui