小编sim*_*ick的帖子

我正在尝试将用python编写的音频播放器迁移到GTK3 +.在GTK2中,我使用了progress_bar.add_event(... pointer_motion_notify | button_press)(下面的完整代码),并为button_press和pointer_motion_notify设置了信号处理程序.在GTK3中,似乎ProgressBar()不会发出这些信号.

我已经使用Overlay()和DrawingArea()实现了一个解决方法,它允许DrawingArea发出信号,但是不应该......这是一个错误吗？或者我做错了吗？

码:

import gi
gi.require_version("Gtk","3.0")
from gi.repository import Gtk, Gdk, GObject

class MainWindow(Gtk.Window):
    def __init__(self):
        super(MainWindow, self).__init__(title='ProgressBar Event Test')
        self.progressbar = Gtk.ProgressBar()
        self.add(self.progressbar)
        self.progressbar.set_events(Gdk.EventMask.BUTTON_PRESS_MASK
                                  | Gdk.EventMask.POINTER_MOTION_MASK)
        self.progressbar.connect("button-press-event", self.on_event, 'button-press')
        self.progressbar.connect("motion-notify-event", self.on_event, 'motion-notify')
        self.connect("delete-event", Gtk.main_quit)
        self.current_progress = 0.0
        GObject.timeout_add(200,self.update_progress)
        self.show_all()

    def on_event(self, widget, event, data=None):
        print "on_event called for %s signal"%data
        return False

    def update_progress(self):
        self.progressbar.set_fraction(self.current_progress)
        self.current_progress += 0.01
        return self.current_progress <= 1   # False cancels timeout

def main():
    w = MainWindow()
    Gtk.main()

if __name__ == …