我在冻结的应用中使用Esky
。它具有以下属性和方法
可以在Esky课程上找到:
app.version: the current best available version.
app.active_version: the currently-executing version, or None
if the esky isn't for the current app.
app.find_update(): find the best available update, or None
if no updates are available.
app.fetch_version(v): fetch the specified version into local storage.
app.install_version(v): install and activate the specified version.
现在,这很好,但我希望在我的Gui中显示下载任务的进度。
我怎样才能做到这一点?
答案 0 :(得分:2)
wxPython将Esky包装在他们自己的SoftwareUpdate方法中:
https://github.com/wxWidgets/wxPython/blob/master/wx/lib/softwareupdate.py
在他们的实现中,应用程序检查新版本,并询问用户是否要更新(使用wx GUI进行交互)。如果用户选择更新,代码只需调用esky的auto_update()方法来处理其余的,但是它们为它提供了一个_updateProgress方法,该方法更新进度条并提供指示Esky进度的消息:
self._esky.auto_update(self._updateProgress)
...
def _updateProgress(self, status):
# Show progress of the download and install. This function is passed to Esky
# functions to use as a callback.
if self._pd is None and status.get('status') != 'done':
self._pd = wx.ProgressDialog('Software Update', ' '*40,
style=wx.PD_CAN_ABORT|wx.PD_APP_MODAL,
parent=self._parentWindow)
self._pd.Update(0, '')
if self._parentWindow:
self._pd.CenterOnParent()
simpleMsgMap = { 'searching' : 'Searching...',
'retrying' : 'Retrying...',
'ready' : 'Download complete...',
'installing' : 'Installing...',
'cleaning up' : 'Cleaning up...',}
if status.get('status') in simpleMsgMap:
self._doUpdateProgress(True, simpleMsgMap[status.get('status')])
elif status.get('status') == 'found':
self._doUpdateProgress(True, 'Found version %s...' % status.get('new_version'))
elif status.get('status') == 'downloading':
received = status.get('received')
size = status.get('size')
currentPercentage = 1.0 * received / size * 100
if currentPercentage > 99.5:
self._doUpdateProgress(False, "Unzipping...", int(currentPercentage))
else:
self._doUpdateProgress(False, "Downloading...", int(currentPercentage))
elif status.get('status') == 'done':
if self._pd:
self._pd.Destroy()
self._pd = None
wx.Yield()
def _doUpdateProgress(self, pulse, message, value=0):
if pulse:
keepGoing, skip = self._pd.Pulse(message)
else:
keepGoing, skip = self._pd.Update(value, message)
if not keepGoing: # user pressed the cancel button
self._pd.Destroy()
self._pd = None
raise UpdateAbortedError()
上面的代码直接来自https://github.com/wxWidgets/wxPython/blob/master/wx/lib/softwareupdate.py。
此功能记录在Esky来源,file: init.py,line: 689。
代码本身显示了您的回调在整个更新过程中可以看到的内容。以下是一些可以调用回调的摘录:
callback({"status":"searching"})
callback({"status":"found", "new_version":version})
callback({"status":"installing", "new_version":version})
for status in self.sudo_proxy.fetch_version_iter(version):
if callback is not None:
callback(status)
callback({"status":"cleaning up"})
callback({"status":"cleaning up"})
callback({"status":"error","exception":e})
callback({"status":"done"})
答案 1 :(得分:0)
没有正确记录,有fetch_version_iter
生成器函数:
fetch_version_iter:与fetch_version类似,但会产生进度更新 在执行期间
它产生以下值:
产量{“状态”:“下载”, “size”:infile_size, “received”:partfile.tell(), }
yield {“status”:“retrying”,“size”:None}
yield {“status”:“ready”,“path”:name}
此外,您可以获得如下文件名:
app.version_finder.version_graph.get_best_path(app.version,v)的