问题描述
在pygtk参考中,它指出每个 Gtk.Widget
都有事件,但是使用我的测试代码,该事件永远不会为Label组件启动
有什么我应该做的不同吗?
import pygtk
pygtk.require('2.0')
import gtk
class LabelTest:
$ b $ def delete_event( self,widget,event,data = None):
return False
def destroy(self,widget,data = None):
gtk.main_quit()
def __init __(self):
self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
self.window.connect(delete_event,self.delete_event)
self.window.connect(destroy,self.destroy)
self.window.set_border_width(10)
self.label = gtk.Label(A label)
#question section
def labelMouseOver(w,data = None):
printmouse over
self.label.connect('enter-notify-event',labelMouseOver,None)
#/问题部分
self.window.add(self.label)
self.label.show()
self.window.show()
def main(self):
gtk.main()
if __name__ ==__main__:
test = LabelTest()
test.main()
$ b $由于性能原因,某些小部件不具有自己的X窗口,因为它们大多是装饰性的,通常不需要处理X事件信号。您可以在找到完整列表。
在这些情况下,来包装无窗口小部件(EventBox是专门为此目标构建的)。
In the pygtk reference it states that every Gtk.Widget
has the event enter-event-notify, but with my test code that event is never fired for the Label widget (with others it has worked).
Is there something I should do differently?
import pygtk
pygtk.require('2.0')
import gtk
class LabelTest:
def delete_event(self, widget, event, data=None):
return False
def destroy(self, widget, data=None):
gtk.main_quit()
def __init__(self):
self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
self.window.connect("delete_event", self.delete_event)
self.window.connect("destroy", self.destroy)
self.window.set_border_width(10)
self.label = gtk.Label("A label")
# question section
def labelMouseOver(w, data=None):
print "mouse over"
self.label.connect('enter-notify-event', labelMouseOver, None)
# /question section
self.window.add(self.label)
self.label.show()
self.window.show()
def main(self):
gtk.main()
if __name__ == "__main__":
test = LabelTest()
test.main()
There are certain widgets that don't own a X-window of their own for performance reasons ,since they are mostly decorative an generally don't need to handle X event signals. You can find a complete list here.
In those cases, a GtkEventBox is recommended to wrap the windowless widget with(the EventBox was build with that objective specifically).
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