From 33d2d0e5ea5136f99ab9fe4166602f8a5c6424e4 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 16 Oct 2014 17:40:31 +0530
Subject: [PATCH] E-book viewer: Allow right clicking on the toolbar buttons to
 popup the optional menus, useful when using the viewer on a touch screen.
 Fixes #1380359 [Feature Request: right-click menus missing in ebook
 viewer](https://bugs.launchpad.net/calibre/+bug/1380359)

---
 src/calibre/gui2/viewer/ui.py | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/calibre/gui2/viewer/ui.py b/src/calibre/gui2/viewer/ui.py
index 704a1f7b70..0066f25411 100644
--- a/src/calibre/gui2/viewer/ui.py
+++ b/src/calibre/gui2/viewer/ui.py
@@ -178,6 +178,19 @@ def test_history():
     assert h == [0, 9]
 # }}}
 
+class ToolBar(QToolBar):  # {{{
+
+    def contextMenuEvent(self, ev):
+        ac = self.actionAt(ev.pos())
+        if ac is None:
+            return
+        ch = self.widgetForAction(ac)
+        sm = getattr(ch, 'showMenu', None)
+        if callable(sm):
+            ev.accept()
+            sm()
+# }}}
+
 class Main(MainWindow):
 
     def __init__(self, debug_javascript):
@@ -209,14 +222,14 @@ class Main(MainWindow):
         hs.setOrientation(Qt.Vertical), hs.setObjectName("horizontal_scrollbar")
         cl.addWidget(hs, 1, 0, 1, 1)
 
-        self.tool_bar = tb = QToolBar(self)
+        self.tool_bar = tb = ToolBar(self)
         tb.setObjectName('tool_bar'), tb.setIconSize(QSize(32, 32))
         self.addToolBar(Qt.LeftToolBarArea, tb)
 
         self.tool_bar2 = tb2 = QToolBar(self)
         tb2.setObjectName('tool_bar2')
         self.addToolBar(Qt.TopToolBarArea, tb2)
-        self.tool_bar.setContextMenuPolicy(Qt.PreventContextMenu)
+        self.tool_bar.setContextMenuPolicy(Qt.DefaultContextMenu)
         self.tool_bar2.setContextMenuPolicy(Qt.PreventContextMenu)
 
         self.pos = DoubleSpinBox()