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First (failed) stab at using threads correctly.

This commit is contained in:
Raoul Snyman 2014-11-06 23:08:56 +02:00
parent fbeb0222a8
commit 435a299b19
1 changed files with 47 additions and 12 deletions
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59
openlp/core/ui/firsttimeform.py
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@ -50,30 +50,48 @@ from .firsttimewizard import UiFirstTimeWizard, FirstTimePage
log = logging.getLogger(__name__)
class ThemeScreenshotThread(QtCore.QThread):
class ThemeScreenshotWorker(QtCore.QObject):
"""
This thread downloads the theme screenshots.
"""
screenshot_downloaded = QtCore.pyqtSignal(str, str)
def __init__(self, config, themes_url):
"""
Set up the worker object
"""
self.config = config
self.themes_url = themes_url
self.was_download_cancelled = False
super(ThemeScreenshotWorker, self).__init__()
def run(self):
"""
Overridden method to run the thread.
"""
themes = self.parent().config.get('themes', 'files')
themes = self.config.get('themes', 'files')
themes = themes.split(',')
config = self.parent().config
config = self.config
for theme in themes:
# Stop if the wizard has been cancelled.
if self.parent().was_download_cancelled:
if self.was_download_cancelled:
return
title = config.get('theme_%s' % theme, 'title')
filename = config.get('theme_%s' % theme, 'filename')
screenshot = config.get('theme_%s' % theme, 'screenshot')
urllib.request.urlretrieve('%s%s' % (self.parent().themes_url, screenshot),
urllib.request.urlretrieve('%s%s' % (self.themes_url, screenshot),
os.path.join(gettempdir(), 'openlp', screenshot))
item = QtGui.QListWidgetItem(title, self.parent().themes_list_widget)
item.setData(QtCore.Qt.UserRole, filename)
item.setCheckState(QtCore.Qt.Unchecked)
item.setFlags(item.flags() | QtCore.Qt.ItemIsUserCheckable)
# Signal that the screenshot has been downloaded
self.screenshot_downloaded.emit(title, filename)
@QtCore.pyqtSlot(bool)
def set_download_canceled(self, toggle):
"""
Externally set if the download was canceled
:param toggle: Set if the download was canceled or not
"""
self.was_download_cancelled = toggle
class FirstTimeForm(QtGui.QWizard, UiFirstTimeWizard, RegistryProperties):
@ -142,8 +160,8 @@ class FirstTimeForm(QtGui.QWizard, UiFirstTimeWizard, RegistryProperties):
self.bibles_url = self.web + self.config.get('bibles', 'directory') + '/'
self.themes_url = self.web + self.config.get('themes', 'directory') + '/'
self.update_screen_list_combo()
self.was_download_cancelled = False
self.theme_screenshot_thread = None
self.theme_screenshot_worker = None
self.has_run_wizard = False
self.downloading = translate('OpenLP.FirstTimeWizard', 'Downloading %s...')
self.cancel_button.clicked.connect(self.on_cancel_button_clicked)
@ -187,7 +205,11 @@ class FirstTimeForm(QtGui.QWizard, UiFirstTimeWizard, RegistryProperties):
item.setFlags(item.flags() | QtCore.Qt.ItemIsUserCheckable)
self.bibles_tree_widget.expandAll()
# Download the theme screenshots.
self.theme_screenshot_thread = ThemeScreenshotThread(self)
self.theme_screenshot_worker = ThemeScreenshotWorker(self.config, self.themes_url)
self.theme_screenshot_worker.screenshot_downloaded.connect(self.on_screenshot_downloaded)
self.theme_screenshot_thread = QtCore.QThread(self)
self.theme_screenshot_thread.started.connect(self.theme_screenshot_worker.run)
self.theme_screenshot_worker.moveToThread(self.theme_screenshot_thread)
self.theme_screenshot_thread.start()
self.application.set_normal_cursor()
@ -255,13 +277,26 @@ class FirstTimeForm(QtGui.QWizard, UiFirstTimeWizard, RegistryProperties):
(self.last_id <= FirstTimePage.Plugins and not self.has_run_wizard):
QtCore.QCoreApplication.exit()
sys.exit()
self.was_download_cancelled = True
if self.theme_screenshot_worker:
self.theme_screenshot_worker.set_download_canceled(True)
# Was the thread created.
if self.theme_screenshot_thread:
while self.theme_screenshot_thread.isRunning():
time.sleep(0.1)
self.application.set_normal_cursor()
def on_screenshot_downloaded(self, title, filename):
"""
Add an item to the list when a theme has been downloaded
:param title: The title of the theme
:param filename: The filename of the theme
"""
item = QtGui.QListWidgetItem(title, self.themes_list_widget)
item.setData(QtCore.Qt.UserRole, filename)
item.setCheckState(QtCore.Qt.Unchecked)
item.setFlags(item.flags() | QtCore.Qt.ItemIsUserCheckable)
def on_no_internet_finish_button_clicked(self):
"""
Process the triggering of the "Finish" button on the No Internet page.