From d5c83e5721e575e6b026076596c352042cb9e9b7 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 24 May 2022 19:40:47 +0530
Subject: [PATCH] Book details popup: Double clicking on the cover now uses
 calibre's internal image viewer. Right click on the cover to open it with
 another program. Fixes #1975406 [[Enhancement] Double click to open cover
 with the calibre Image
 viewer](https://bugs.launchpad.net/calibre/+bug/1975406)

---
 src/calibre/gui2/init.py | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/calibre/gui2/init.py b/src/calibre/gui2/init.py
index e20ea42ec9..d3d58a5747 100644
--- a/src/calibre/gui2/init.py
+++ b/src/calibre/gui2/init.py
@@ -7,9 +7,9 @@ __docformat__ = 'restructuredtext en'
 
 import functools
 from qt.core import (
-    QAction, QApplication, QDialog, QEvent, QIcon, QLabel, QMenu, QStylePainter,
-    QSizePolicy, QSplitter, QStackedWidget, QStatusBar, QStyle, QStyleOption, Qt,
-    QTabBar, QTimer, QToolButton, QVBoxLayout, QWidget
+    QAction, QApplication, QDialog, QEvent, QIcon, QLabel, QMenu, QPixmap, QUrl,
+    QSizePolicy, QSplitter, QStackedWidget, QStatusBar, QStyle, QStyleOption,
+    QStylePainter, Qt, QTabBar, QTimer, QToolButton, QVBoxLayout, QWidget
 )
 
 from calibre.constants import get_appname_for_display, get_version, ismacos
@@ -741,7 +741,15 @@ class LayoutMixin:  # {{{
         cpath = self.current_db.new_api.format_abspath(book_id, '__COVER_INTERNAL__')
         if cpath:
             if entry is None:
-                open_local_file(cpath)
+                pm = QPixmap()
+                pm.load(cpath)
+                pm.setDevicePixelRatio(self.devicePixelRatioF())
+                if pm.isNull():
+                    open_local_file(cpath)
+                else:
+                    from calibre.gui2.image_popup import ImageView
+                    iv = ImageView(QApplication.instance().focusWindow(), pm, QUrl.fromLocalFile(cpath), geom_name='book_details_image_view')
+                    iv(use_exec=True)
                 return
             from calibre.gui2.open_with import run_program
             run_program(entry, cpath, self)