Gtk3 ProgressBar():无法在Python中接收事件

时间:2015-11-27 12:35:54

标签: python gtk3

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()实现了一种解决方法,它允许DrawingArea发出信号,但不应该...... 这是一个错误吗?或者我做错了吗?

代码:

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__ == '__main__':
    main()

1 个答案:

答案 0 :(得分:4)

使用事件框可能更好 - 您将窗口小部件添加到事件框并自行连接到事件框信号。

因此:

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')
        eventbox = Gtk.EventBox()
        self.progressbar = Gtk.ProgressBar()
        eventbox.add(self.progressbar)
        self.add(eventbox)
        eventbox.set_events(Gdk.EventMask.BUTTON_PRESS_MASK
                                  | Gdk.EventMask.POINTER_MOTION_MASK)
        eventbox.connect("button-press-event", self.on_event, 'button-press')
        eventbox.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__ == '__main__':
    main()

有关Gtk.Eventbox的更多信息,请访问here