Notify if C PoW missing

- Linux users often don't know that the C PoW is available and complain
  it's slow. This will try to build it, and adds availability
  notification in the status bar
- also, the updateStatusBar signal now allows emphasised notifications,
  which will remain visible for a longer period of time and also
  reappear if a status change happened in the meantime

src/bitmessageqt/__init__.py

@@ -76,6 +76,7 @@ from class_objectHashHolder import objectHashHolder
 from class_singleWorker import singleWorker
 from helper_generic import powQueueSize, invQueueSize
 from proofofwork import getPowType
+from statusbar import BMStatusBar
 
 def _translate(context, text, disambiguation = None, encoding = None, number = None):
     if number is None:
@@ -703,6 +704,7 @@ class MyForm(settingsmixin.SMainWindow):
 
         # Put the colored icon on the status bar
         # self.pushButtonStatusIcon.setIcon(QIcon(":/newPrefix/images/yellowicon.png"))
+        self.setStatusBar(BMStatusBar())
         self.statusbar = self.statusBar()
 
         self.pushButtonStatusIcon = QtGui.QPushButton(self)
@@ -3927,10 +3929,19 @@ class MyForm(settingsmixin.SMainWindow):
         self.rerenderComboBoxSendFromBroadcast()
 
     def updateStatusBar(self, data):
-        if data != "":
-            logger.info('Status bar: ' + data)
+        if type(data) is tuple or type(data) is list:
+            option = data[1]
+            message = data[0]
+        else:
+            option = 0
+            message = data
+        if message != "":
+            logger.info('Status bar: ' + message)
 
-        self.statusBar().showMessage(data, 10000)
+        if option == 1:
+            self.statusBar().addImportant(message)
+        else:
+            self.statusBar().showMessage(message, 10000)
 
     def initSettings(self):
         QtCore.QCoreApplication.setOrganizationName("PyBitmessage")

src/bitmessageqt/statusbar.py

@@ -0,0 +1,38 @@
+from PyQt4 import QtCore, QtGui
+from Queue import Queue
+from time import time
+
+class BMStatusBar(QtGui.QStatusBar):
+    duration = 10000
+    deleteAfter = 60
+
+    def __init__(self, parent=None):
+        super(BMStatusBar, self).__init__(parent)
+        self.important = []
+        self.timer = self.startTimer(BMStatusBar.duration)
+        self.iterator = 0
+
+    def timerEvent(self, event):
+        while len(self.important) > 0:
+            self.iterator += 1
+            try:
+                if time() > self.important[self.iterator][1] + BMStatusBar.deleteAfter:
+                    del self.important[self.iterator]
+                    self.iterator -= 1
+                    continue
+            except IndexError:
+                self.iterator = -1
+                continue
+            super(BMStatusBar, self).showMessage(self.important[self.iterator][0], 0)
+            break
+
+    def addImportant(self, message):
+        self.important.append([message, time()])
+        self.iterator = len(self.important) - 2
+        self.timerEvent(None)
+
+    def showMessage(self, message, timeout=0):
+        super(BMStatusBar, self).showMessage(message, timeout)
+
+    def clearMessage(self):
+        super(BMStatusBar, self).clearMessage()

src/proofofwork.py

@@ -3,6 +3,7 @@
 #from multiprocessing import Pool, cpu_count
 import hashlib
 from struct import unpack, pack
+from subprocess import call
 import sys
 import time
 from debug import logger
@@ -12,6 +13,8 @@ import tr
 import os
 import ctypes
 
+bitmsglib = 'bitmsghash.so'
+
 def _set_idle():
     if 'linux' in sys.platform:
         import os
@@ -109,7 +112,7 @@ def _doGPUPoW(target, initialHash):
     #print "{} - value {} < {}".format(nonce, trialValue, target)
     if trialValue > target:
         deviceNames = ", ".join(gpu.name for gpu in openclpow.enabledGpus)
-        shared.UISignalQueue.put(('updateStatusBar', tr._translate("MainWindow",'Your GPU(s) did not calculate correctly, disabling OpenCL. Please report to the developers.')))
+        shared.UISignalQueue.put(('updateStatusBar', (tr._translate("MainWindow",'Your GPU(s) did not calculate correctly, disabling OpenCL. Please report to the developers.'), 1)))
         logger.error("Your GPUs (%s) did not calculate correctly, disabling OpenCL. Please report to the developers.", deviceNames)
         openclpow.enabledGpus = []
         raise Exception("GPU did not calculate correctly.")
@@ -150,6 +153,37 @@ def getPowType():
         return "C"
     return "python"
 
+def notifyBuild(tried=False):
+    global bmpow
+
+    if bmpow:
+        shared.UISignalQueue.put(('updateStatusBar', (tr._translate("proofofwork", "C PoW module built successfully."), 1)))
+    elif tried:
+        shared.UISignalQueue.put(('updateStatusBar', (tr._translate("proofofwork", "Failed to build C PoW module. Please build it manually."), 1)))
+    else:
+        shared.UISignalQueue.put(('updateStatusBar', (tr._translate("proofofwork", "C PoW module unavailable. Please build it."), 1)))
+
+def buildCPoW():
+    global bmpow
+
+    if bmpow is not None:
+        return
+    if shared.frozen is not None:
+        notifyBuild(False)
+        return
+    if sys.platform in ["win32", "win64"]:
+        notifyBuild(False)
+        return
+    try:
+        call(["make", "-C", os.path.join(shared.codePath(), "bitmsghash")])
+        if os.path.exists(os.path.join(shared.codePath(), "bitmsghash", "bitmsghash.so")):
+            init()
+            notifyBuild(True)
+        else:
+            notifyBuild(True)
+    except:
+        notifyBuild(True)
+
 def run(target, initialHash):
     if shared.shutdown != 0:
         raise
@@ -194,8 +228,9 @@ def run(target, initialHash):
         pass #fallback
 
 # init
-bitmsglib = 'bitmsghash.so'
-if "win32" == sys.platform:
+def init():
+    global bitmsglib, bso, bmpow
+    if "win32" == sys.platform:
         if ctypes.sizeof(ctypes.c_voidp) == 4:
             bitmsglib = 'bitmsghash32.dll'
         else:
@@ -221,18 +256,21 @@ if "win32" == sys.platform:
             except:
                 logger.error("C PoW test fail.", exc_info=True)
                 bso = None
-else:
+    else:
         try:
             bso = ctypes.CDLL(os.path.join(shared.codePath(), "bitmsghash", bitmsglib))
             logger.info("Loaded C PoW DLL %s", bitmsglib)
         except:
             bso = None
-if bso:
+    if bso:
         try:
             bmpow = bso.BitmessagePOW
             bmpow.restype = ctypes.c_ulonglong
         except:
             bmpow = None
-else:
+    else:
         bmpow = None
 
+init()
+if bmpow is None:
+    buildCPoW()

src/translations/bitmessage.pro

@@ -16,6 +16,7 @@ SOURCES	= 	../addresses.py\
 			../helper_msgcoding.py\
 			../helper_sent.py\
 			../helper_startup.py\
+			../proofofwork.py\
 			../shared.py\
 			../upnp.py\
 			../bitmessageqt/__init__.py\