def getValuePng(self, params=None):
"""get Picture"""
fileExt = RandomNameSequence().next()
rrdFile = self.context.getRrdFilename()
if not os.path.exists(rrdFile):
return None
params['targetname'] = str("/tmp/%s%s_%s.png" % \
(str(self.context.objectID),
params['nameext'],
fileExt))
self.context.generateValuePng(params)
self.request.response.setHeader('Content-Type', 'image/png')
pic = open(params['targetname'], "r")
picMem = pic.read()
pic.close()
os.remove(params['targetname'])
return picMem
def appendImage(self, hours, elemList):
fileExt = RandomNameSequence().next()
currtime = time.time()
params = {}
params['imgtype'] = "PNG"
params['nameext'] = "_%dh" % hours
params['starttime'] = currtime - 3600 * hours
params['endtime'] = currtime
params['width'] = 900
params['height'] = 266
params['targetname'] = str("/tmp/%s%s_%s.png" % \
(str(self.context.objectID),
params['nameext'],
fileExt))
self.context.generateValuePng(params)
im = Image(params['targetname'], width=13.5 * cm, height=4 * cm)
im.hAlign = 'RIGHT'
elemList.append(im)
elemList.append(Spacer(0, 4 * mm))
self.appendFile2Delete(params['targetname'])