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Implement a queue to process the requests

This commit is contained in:
Tim Bentley 2011-11-28 17:10:00 +00:00
parent ef884792ac
commit 4f629dfd3b
1 changed files with 25 additions and 12 deletions
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37
openlp/core/ui/slidecontroller.py
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@ -26,9 +26,9 @@
###############################################################################
import logging
import os
import time
import copy
from collections import deque
from PyQt4 import QtCore, QtGui
from PyQt4.phonon import Phonon
@ -79,7 +79,6 @@ class SlideController(QtGui.QWidget):
self.songEdit = False
self.selectedRow = 0
self.serviceItem = None
self.keypress_count = 0
self.panel = QtGui.QWidget(parent.controlSplitter)
self.slideList = {}
# Layout for holding panel
@ -92,6 +91,7 @@ class SlideController(QtGui.QWidget):
self.typeLabel.setText(UiStrings().Live)
self.split = 1
self.typePrefix = u'live'
self.keypress_queue = deque()
else:
self.typeLabel.setText(UiStrings().Preview)
self.split = 0
@ -579,18 +579,31 @@ class SlideController(QtGui.QWidget):
self.display.videoStop()
def servicePrevious(self):
self.keypress_count += 1
if self.keypress_count == 1:
while self.keypress_count != 0:
Receiver.send_message('servicemanager_previous_item')
self.keypress_count -= 1
"""
Live event to select the previous service item from the service manager.
"""
self.keypress_queue.append(u'previous')
self._process_queue()
def serviceNext(self):
self.keypress_count += 1
if self.keypress_count == 1:
while self.keypress_count != 0:
Receiver.send_message('servicemanager_next_item')
self.keypress_count -= 1
"""
Live event to select the next service item from the service manager.
"""
self.keypress_queue.append(u'next')
self._process_queue()
def _process_queue(self):
"""
Process the service item request queue. The key presses can arrive
faster than the processing so implement a FIFO queue.
"""
if len(self.keypress_queue):
while len(self.keypress_queue):
if self.keypress_queue.popleft() == u'previous':
Receiver.send_message('servicemanager_previous_item')
else:
Receiver.send_message('servicemanager_next_item')
def screenSizeChanged(self):