PyGtk3，在可选标签上隐藏光标

Question

我可以用set_selectable方法在pygtk3中制作一个可选标签。但我无法隐藏可选标签的光标。有没有办法做到这一点？

Answer 1

首先，通常您可能会重新考虑禁用游标。没有它，你不能轻松地选择（部分）文本。如果您只想要整个文本，则可能更容易执行label.get_text()来获取文本。

如果由于某种模糊的原因，你做想改变（或隐藏）光标，你可以使用一个小部件的enter和leave事件。标签小部件没有这些，因此您必须首先将GtkLabel插入GtkEventBox。以下是如何做到这一点：

#!/usr/bin/env python3 
# -*- coding: utf-8 -*- 
# 
# test_selectable_label.py 
# 
# Copyright 2017 John Coppens <john@jcoppens.com> 
# 
# This program is free software; you can redistribute it and/or modify 
# it under the terms of the GNU General Public License as published by 
# the Free Software Foundation; either version 2 of the License, or 
# (at your option) any later version. 
# 
# This program is distributed in the hope that it will be useful, 
# but WITHOUT ANY WARRANTY; without even the implied warranty of 
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
# GNU General Public License for more details. 
# 
# You should have received a copy of the GNU General Public License 
# along with this program; if not, write to the Free Software 
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 
# MA 02110-1301, USA. 
# 
# 


from gi.repository import Gtk 

class TestWindow(Gtk.VBox): 
    def __init__(self): 
     super(TestWindow, self).__init__() 
     self.set_spacing(5) 

     sel_label = Gtk.Label("abcdefghijklmnopqrstuvwxyz") 
     sel_label.set_selectable(True) 

     sel_evbox = Gtk.EventBox() 
     sel_evbox.add(sel_label) 
     sel_evbox.connect("enter_notify_event", self.enter_label) 
     sel_evbox.connect("leave_notify_event", self.leave_label) 
     self.pack_start(sel_evbox, False, False, 0) 

     label = Gtk.Label() 
     self.pack_start(label, False, False, 0) 

    def enter_label(self, wdg, event): 
     print("Entering") 

    def leave_label(self, wdg, event): 
     print("Leaving") 


class MainWindow(Gtk.Window): 
    def __init__(self): 
     super(MainWindow, self).__init__() 
     self.connect("destroy", lambda x: Gtk.main_quit()) 

     self.add(TestWindow()) 
     self.show_all() 

    def run(self): 
     Gtk.main() 


def main(args): 
    mainwdw = MainWindow() 
    mainwdw.run() 

    return 0 

if __name__ == '__main__': 
    import sys 
    sys.exit(main(sys.argv)) 

我没有实现光标的实际隐藏/显示。一种方法是，使之透明（见GtkWidget的override_cursor方法。set_style将是另一个。