GtkToolButton中的新闻事件

我有一个工具栏和一些Gtk3 +中的工具按钮，但不是点击，我想跟踪新闻事件。我试过：GtkToolButton中的新闻事件

priv->toolbar = gtk_toolbar_new(); 
priv->btn_right= GTK_WIDGET(gtk_tool_button_new(NULL,NULL)); 
gtk_widget_add_events(priv->btn_right, GDK_BUTTON_PRESS_MASK); 
g_signal_connect(priv->btn_right, "button-press-event", 
       G_CALLBACK(at_btn_right_pressed),self); 
gtk_toolbar_insert(GTK_TOOLBAR(priv->toolbar), 
        GTK_TOOL_ITEM(priv->btn_right), 
        6);

但它不起作用。如果我替换button-press-event为click，它适用于点击事件。 at_btn_right_pressed(GtkWidget*, GdkEvent*, gpointer)是这些事件的常用处理程序。

UPDATE：我建立一个图像浏览器，有四个工具栏 “按钮”（左，上，上，下）。当用户用鼠标按下“按钮”时，图像被转换为选定的方向。 clicked信号不是一个好的解决方案，因为用户需要多次点击才能翻译图像，但只需要一次按下事件+一次发布即可完成相同的任务。
A MWE in Gist

谢谢。

来源

2016-07-05 Anderson

问题是它没有达到回调。我提供了断点，但调试过程并不止于此，尽管我将所有回调内容替换为printf + return。我做了一个[MWE]（https://gist.github.com/anderflash/b9cffe559f3981e3fc63e9e0d4eb63ac） – Anderson

别担心。也许这是一个Gtk +设计决定。所以我可以重新考虑重新设计不使用GtkToolbar的界面。目前，我添加了键盘快捷键来完成翻译。 – Anderson

对[GtkToolButton源代码]（https://github.com/GNOME/gtk/blob/master/gtk/gtktoolbutton.c）的一点检查表明，GtkToolButton只是一个拥有GtkButton子项的容器，我们不会无法访问它。只需将按钮的'click'事件传播到工具按钮即可。我认为这种封装失去了几个应用的灵活性。 GtkToolButton可以传播其他GtkButton事件，或者添加一个访问器到按钮。 – Anderson

似乎没有一种简单的方法来禁用默认的“单击”处理程序。显然，该点击处理程序正在窃取用户的'已按'事件。如果你足够快，你可以看到发生这种情况（至少这是我的解释）。点击一个按钮时，它会等待几百毫秒来检查是否发生了另一次点击（双击事件）。在此期间，新闻事件做通过。测试运行下面的程序，点击按钮反复（和快速）：

#!/usr/bin/env python 
# -*- coding: utf-8 -*- 
# 
# test_toolbar_press.py 
# 
# Copyright 2016 John Coppens <[email protected]> 
# 
# 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, Gdk 

class MyToolbar(Gtk.Toolbar): 
    def __init__(self): 
     super(MyToolbar, self).__init__() 

     btn = Gtk.ToolButton(None, None) 
     btn.connect("button-press-event", self.btn_pressed) 
     btn.connect_after("clicked", self.btn_clicked) 

     self.insert(btn, 0) 

    def btn_pressed(self, wdg, event): 
     print("Button pressed") 

    def btn_clicked(self, wdg): 
     print("Button clicked") 

class MainWindow(Gtk.Window): 
    def __init__(self): 
     super(MainWindow, self).__init__() 
     self.connect("destroy", lambda x: Gtk.main_quit()) 
     self.set_size_request(200, 50) 

     tbar = MyToolbar() 
     self.add(tbar) 

     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))

点击缓慢显示了正常的“点击次数”，更快也显示了“按下”：

我建议以下解决方案 - 尽管它不是一个工具栏，你可以做这样的变化，以适应您的设计：

#!/usr/bin/env python 
# -*- coding: utf-8 -*- 
# 
# test_toolbar_press.py 
# 
# Copyright 2016 John Coppens <[email protected]> 
# 
# 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, Gdk 

class MyNavbar(Gtk.Grid): 
    def __init__(self): 
     super(MyNavbar, self).__init__() 

     for dir, x, y in (("N", 1, 0), ("E", 2, 1), ("S", 1, 2), ("W", 0, 1)): 
      btn = Gtk.Button(dir, None) 
      btn.connect("button-press-event", self.btn_pressed, dir) 
      btn.connect("button-release-event", self.btn_released, dir) 
      self.attach(btn, x, y, 1, 1) 

    def btn_pressed(self, wdg, event, data): 
     print("Button pressed %s" % data) 

    def btn_released(self, wdg, event, data): 
     print("Button released %s" % data) 

class MainWindow(Gtk.Window): 
    def __init__(self): 
     super(MainWindow, self).__init__() 
     self.connect("destroy", lambda x: Gtk.main_quit()) 
     self.set_size_request(200, 50) 

     tbar = MyNavbar() 
     self.add(tbar) 

     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))

这是结果：

，这是程序的输出：

Button pressed N 
Button released N 
Button pressed E 
Button released E 
Button pressed S 
Button released S 
Button pressed W 
Button released W

我的道歉在Python中的例子。但是，将基本Gtk函数转换为C应该不会太困难。

来源

2016-07-15 15:32:27 jcoppens

GtkToolButton中的新闻事件

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