From 3cfe6d95a219a4fd6579a8362716c2c7062fb551 Mon Sep 17 00:00:00 2001
From: Li Fanxi <lifanxi@freemindworld.com>
Date: Thu, 16 Dec 2010 00:14:41 +0800
Subject: [PATCH] [Device] Give prompts when Bambook SDK is not avalible.

---
 src/calibre/devices/bambook/driver.py         | 6 +++++-
 src/calibre/devices/bambook/libbambookcore.py | 3 +++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/calibre/devices/bambook/driver.py b/src/calibre/devices/bambook/driver.py
index a687d3b88d..b1731306ca 100644
--- a/src/calibre/devices/bambook/driver.py
+++ b/src/calibre/devices/bambook/driver.py
@@ -12,11 +12,12 @@ import time, os, hashlib
 from itertools import cycle
 from calibre.devices.interface import DevicePlugin
 from calibre.devices.usbms.deviceconfig import DeviceConfig
-from calibre.devices.bambook.libbambookcore import Bambook, text_encoding, CONN_CONNECTED
+from calibre.devices.bambook.libbambookcore import Bambook, text_encoding, CONN_CONNECTED, is_bambook_lib_ready
 from calibre.devices.usbms.books import Book, BookList
 from calibre.ebooks.metadata.book.json_codec import JsonCodec
 from calibre.ptempfile import TemporaryDirectory, TemporaryFile
 from calibre.constants import __appname__, __version__
+from calibre.devices.errors import OpenFeedback
 
 class BAMBOOK(DeviceConfig, DevicePlugin):
     name           = 'Bambook Device Interface'
@@ -52,6 +53,9 @@ class BAMBOOK(DeviceConfig, DevicePlugin):
         self.open()
     
     def open(self):
+        # Make sure the Bambook library is ready
+        if not is_bambook_lib_ready():
+            raise OpenFeedback(_("Unable to connect to Bambook, you need to install Bambook library first."))
         # Disconnect first if connected
         self.eject()
         # Connect
diff --git a/src/calibre/devices/bambook/libbambookcore.py b/src/calibre/devices/bambook/libbambookcore.py
index 9bae22b83f..12a88d5f62 100644
--- a/src/calibre/devices/bambook/libbambookcore.py
+++ b/src/calibre/devices/bambook/libbambookcore.py
@@ -38,6 +38,9 @@ elif islinux:
 elif isosx:
     text_encoding = 'utf-8'
 
+def is_bambook_lib_ready():
+    return lib_handle != None
+
 # Constant
 DEFAULT_BAMBOOK_IP = '192.168.250.2'
 BAMBOOK_SDK_VERSION = 0x00090000