[英]Python/Glade/PyGTK - Download Percentage in Glade Label
我正在尝试使用Glade,PyGTK和Python设置一个小型下载应用程序。 我已经计划好了如何编写这个进度条和所有内容的脚本,尽管我觉得我的方式错误,因为......好吧......它没有用。
我正在使用我找到的一个小脚本来检查下载的百分比,然后通常它会打印到终端,但我想它会改变Glade中的标签。 虽然在下载过程中不会改变标签,但GUI会冻结,直到文件完成,然后更新说它已完成100%。
制作像这样的作品最好的方法是什么? 任何帮助表示赞赏,提前谢谢!
Python脚本:
import sys
import pygtk
pygtk.require("2.0")
import gtk
import gtk.glade
import urllib2
import time
class FileSelector:
def __init__(self):
#Set the Glade file
filename = "FileSelector.glade"
self.builder = gtk.Builder()
self.builder.add_from_file(filename)
self.builder.connect_signals(self)
self.window = self.builder.get_object("MainWindow")
self.label1 = self.builder.get_object("label1")
def on_MainWindow_destroy(self, obj):
gtk.main_quit() #make the program quit
def btnSubmit_clicked(self, widget):
status_dropbox = self.builder.get_object("chkboxDropbox")
status_python = self.builder.get_object("chkboxPython")
status_chrome = self.builder.get_object("chkboxChrome")
#Start downloader script
url = "http://dl.dropbox.com/u/9235267/project.png"
file_name = url.split('/')[-1]
u = urllib2.urlopen(url)
f = open(file_name, 'wb')
meta = u.info()
file_size = int(meta.getheaders("Content-Length")[0])
print "Downloading: %s Bytes: %s" % (file_name, file_size)
file_size_dl = 0
block_sz = 8192
while True:
buffer = u.read(block_sz)
if not buffer:
break
file_size_dl += len(buffer)
f.write(buffer)
status = r"%10d [%3.2f%%]" % (file_size_dl, file_size_dl * 100. / file_size)
self.label1.set_text(status)
f.close()
if __name__ == "__main__":
FileSelector()
gtk.main()
Glade文件(FileSelector.glade):
<?xml version="1.0" encoding="UTF-8"?>
<interface>
<requires lib="gtk+" version="2.24"/>
<!-- interface-naming-policy project-wide -->
<object class="GtkWindow" id="MainWindow">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="title" translatable="yes">MainWindow</property>
<property name="resizable">False</property>
<property name="window_position">center</property>
<signal name="destroy" handler="on_MainWindow_destroy" swapped="no"/>
<child>
<object class="GtkVBox" id="vbox1">
<property name="visible">True</property>
<property name="can_focus">False</property>
<child>
<object class="GtkLabel" id="label1">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="label" translatable="yes">Enviroment Downloader</property>
<attributes>
<attribute name="style" value="normal"/>
<attribute name="size" value="300"/>
</attributes>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkCheckButton" id="chkboxDropbox">
<property name="label" translatable="yes">Dropbox</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="receives_default">False</property>
<property name="use_action_appearance">False</property>
<property name="draw_indicator">True</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">1</property>
</packing>
</child>
<child>
<object class="GtkCheckButton" id="chkboxPython">
<property name="label" translatable="yes">Python</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="receives_default">False</property>
<property name="use_action_appearance">False</property>
<property name="draw_indicator">True</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">2</property>
</packing>
</child>
<child>
<object class="GtkCheckButton" id="chkboxChrome">
<property name="label" translatable="yes">Google Chrome</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="receives_default">False</property>
<property name="use_action_appearance">False</property>
<property name="draw_indicator">True</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">3</property>
</packing>
</child>
<child>
<object class="GtkButton" id="btnSubmit">
<property name="label" translatable="yes">Download/Run</property>
<property name="visible">True</property>
<property name="can_focus">True</property>
<property name="receives_default">True</property>
<property name="use_action_appearance">False</property>
<signal name="clicked" handler="btnSubmit_clicked" swapped="no"/>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">4</property>
</packing>
</child>
</object>
</child>
</object>
</interface>
行后
self.label1.set_text(status)
加:
while gtk.events_pending():
gtk.main_iteration()
这将在您等待文件下载时更新GUI并运行主循环,您不必使用线程。
您需要使用线程。 如果您在回调函数中下载,则按钮上的事件被阻止,您可以看到按钮处于按下状态,即它正在等待回调函数完成并返回。 虽然我对python的了解是零,但我可以使用谷歌等制作一些样本如下:
import sys
import pygtk
pygtk.require("2.0")
import gtk
import gtk.glade
import urllib2
import time
import threading
import glib
# Replace this with what you want to do
def download(label):
index = 0
while True:
if index>1200:
break
index += 120
time.sleep(1)
status = r"%10d " % (index)
label.set_label(status)
class FileSelector:
def __init__(self):
#Set the Glade file
filename = "FileSelector.glade"
self.builder = gtk.Builder()
self.builder.add_from_file(filename)
self.builder.connect_signals(self)
self.window = self.builder.get_object("MainWindow")
self.label1 = self.builder.get_object("label1")
def on_MainWindow_destroy(self, obj):
gtk.main_quit() #make the program quit
def btnSubmit_clicked(self, widget):
status_dropbox = self.builder.get_object("chkboxDropbox")
status_python = self.builder.get_object("chkboxPython")
status_chrome = self.builder.get_object("chkboxChrome")
# Launch the thread to update label
threading.Thread(target=download, args=(self.builder.get_object("label1"),)).start()
if __name__ == "__main__":
FileSelector()
glib.threads_init()
# Add gdk thread enter and leave
gtk.main()
你也可以参考这个问题 。
希望这可以帮助!
PS:添加线程安全并可能禁用按钮直到下载完成?
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