如何在 py-gtk 窗口中显示连续数据? [英] How to display continuous data in a py-gtk window?
问题描述
我试图使用 py-gtk 构建一个简单的秒表应用程序.这是我的秒表窗口中切换按钮的回调函数.
I was trying to build a simple stopwatch app using py-gtk. Here is the callback function for the toggle button in my stopwatch window.
def start(self,widget):
if widget.get_active():
widget.set_label('Stop')
else:
self.entry.set_text(str(time.time() - s))
widget.set_label('Start')
它工作得非常好,除了时间不会连续显示在条目小部件中.如果我在 'If ' 条件中添加一个无限循环,
It works perfectly well except for the fact that time does not get continuously get displayed in the entry widget. If I add an infinite while loop inside the 'If ' condition like ,
while 1:
self.entry.set_text(str(time.time() - s))
窗口变得无响应.有人可以帮忙吗?
the window becomes unresponsive. Can someone help?
推荐答案
gobject.timeout_add(500, self.update)
让 gtk 每 500 毫秒调用一次 self.update()
.
to have gtk call self.update()
every 500 milliseconds.
在 update
方法中检查秒表是否处于活动状态并调用
In the update
method check if the stopwatch is active and call
self.entry.set_text(str(time.time() - s))
根据需要.
以下是使用 gobject.timeout_add
绘制进度条的相当简短的示例:
Here is fairly short example which draws a progress bar using gobject.timeout_add
:
import pygtk
pygtk.require('2.0')
import gtk
import gobject
import time
class ProgressBar(object):
def __init__(self):
self.val = 0
self.scale = gtk.HScale()
self.scale.set_range(0, 100)
self.scale.set_update_policy(gtk.UPDATE_CONTINUOUS)
self.scale.set_value(self.val)
gobject.timeout_add(100, self.timeout)
def timeout(self):
self.val += 1
# time.sleep(1)
self.scale.set_value(self.val)
return True
def demo_timeout_add():
# http://faq.pygtk.org/index.py?req=show&file=faq23.020.htp
# http://stackoverflow.com/a/497313/190597
win = gtk.Window()
win.set_default_size(300, 50)
win.connect("destroy", gtk.main_quit)
bar = ProgressBar()
win.add(bar.scale)
win.show_all()
gtk.main()
demo_timeout_add()
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