3

I am trying to make an example of a proper Gtk.HeaderBar with Gtk.PopoverMenus that shows how the different widgets are used. I looked at a lot of examples and code, but can't figure out, how to work the Gtk.ModelButton.

Especially this sentence makes no sense to me:

When the action is specified via the “action-name” and “action-target” properties, the role of the button (i.e. whether it is a plain, check or radio button) is determined by the type of the action and doesn't have to be explicitly specified with the “role” property.

In any case, here is my attempt to just use normal widgets in the PopoverMenu, leading to inconsistent highlighting (the whole row should be highlighted):

enter image description here

So my question is: How are ModelButtons subclassed, so they appear as proper PopoverMenu-widgets?

Here is the Python code:

from gi.repository import Gtk, Gio

class HeaderBarWindow(Gtk.Window):

    def __init__(self):
        Gtk.Window.__init__(self, title="HeaderBar & PopoverMenu")
        self.set_border_width(10)
        self.set_default_size(400, 400)
        builder = Gtk.Builder()
        objects = builder.add_objects_from_file("popovermenu_layout.xml", ("pom_options", ""))
        pom_opt = builder.get_object("pom_options")
        builder.connect_signals(self)

        hb = Gtk.HeaderBar()
        hb.set_show_close_button(True)
        hb.props.title = "HeaderBar & PopoverMenu"
        self.set_titlebar(hb)

        def on_click(button, popovermenu):
            """
            Toggles the respective popovermenu.
            """
            if popovermenu.get_visible():
                popovermenu.hide()
            else:
                popovermenu.show_all()

        button_opt = Gtk.Button()
        icon = Gio.ThemedIcon(name="format-justify-fill-symbolic")
        image = Gtk.Image.new_from_gicon(icon, Gtk.IconSize.BUTTON)
        button_opt.add(image)
        hb.pack_end(button_opt)
        pom_opt.set_relative_to(button_opt)
        button_opt.connect("clicked", on_click, pom_opt)

        self.add(Gtk.TextView())

    def print_something(self, modelbutton, event):
        print("you pressed a button")

    def night_mode_switcher(self, switch, state):
        Gtk.Settings.get_default().set_property("gtk-application-prefer-dark-theme", state)

win = HeaderBarWindow()
win.connect("delete-event", Gtk.main_quit)
win.show_all()
Gtk.main()

And here is the model for the PopoverMenu:

<interface>
    <object class="GtkPopoverMenu" id ="pom_options">
      <child>
        <object class="GtkBox">
          <property name="visible">True</property>
          <property name="margin">10</property>
          <property name="orientation">vertical</property>
          <child>
            <object class="GtkModelButton" id="mb_print">
              <property name="visible">True</property>
              <property name="text" translatable="yes">Print</property>
              <property name="can_focus">True</property>
              <property name="receives_default">True</property>
              <signal name="button-press-event" handler="print_something" swapped="no"/>
            </object>
          </child>
          <child>
            <object class="GtkCheckButton" id="checkbutton1">
              <property name="label" translatable="yes">checkbutton</property>
              <property name="visible">True</property>
              <property name="can_focus">True</property>
              <property name="receives_default">False</property>
              <property name="draw_indicator">True</property>
            </object>
          </child>
          <child>
              <object class="GtkBox" id="box1">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <child>
                  <object class="GtkSwitch" id="switch1">
                    <property name="visible">True</property>
                    <property name="can_focus">True</property>
                    <signal name="state-set" handler="night_mode_switcher" swapped="no"/>
                    <property name="margin_start">9</property>
                    <property name="margin_end">9</property>
                  </object>
                  <packing>
                    <property name="expand">False</property>
                    <property name="fill">True</property>
                    <property name="position">0</property>
                  </packing>
                </child>
                <child>
                  <object class="GtkModelButton" id="mb_night">
                    <property name="text" translatable="yes">Night Mode</property>
                    <property name="visible">True</property>
                    <property name="can_focus">False</property>
                    <property name="margin_start">9</property>
                    <property name="margin_end">9</property>
                  </object>
                  <packing>
                    <property name="expand">True</property>
                    <property name="fill">True</property>
                    <property name="position">1</property>
                  </packing>
                </child>
              </object>
          </child>
        </object>
      </child>
    </object>
</interface>
4

1 回答 1

5

我设法解决了我的大部分问题。最重要的是，似乎必须使用Gtk.Applicationand Gtk.ApplicationWindow。我不能说我完全理解为什么，但这使得Actions以 的形式添加Gio.SimpleActions到应用程序中成为可能。Gtk.Builder解析XML菜单，并且可以使用 - 方法简单地将其添加到菜单中set_popover。然后，对于 XML 中定义的每个动作（不要忘记app.XML 中的 -prefix），在 Python 代码Gio.SimpleAction中创建一个（没有app.-prefix 作为名称）并添加到应用程序中。我有一个正常的按钮和一个可以工作的复选按钮。仍在为单选按钮苦苦挣扎，但这可能是另一个问题。

这是Python代码：

from gi.repository import Gio, Gtk, GLib
import sys


class MainApplication(Gtk.Application):

    def __init__(self):
        Gtk.Application.__init__(self,
                                 application_id="needs.dot",
                                 flags=Gio.ApplicationFlags.FLAGS_NONE)
        #https://developer.gnome.org/gio/unstable/GApplication.html#g-application-id-is-valid
        self.connect("activate", self.activate_window)

    def activate_window(self, app):
        """
        The activate signal of Gtk.Application passes the MainApplication class
        to the window. The window is then set as a window of that class.
        """
        self.window = Gtk.ApplicationWindow()
        self.window.set_default_size(500, 400)

        self.hb = Gtk.HeaderBar()
        self.hb.set_show_close_button(True)
        self.hb.props.title = "HeaderBar & PopOverMenu"
        self.window.set_titlebar(self.hb)

        button_settings = Gtk.MenuButton()
        icon = Gio.ThemedIcon(name="format-justify-fill-symbolic")
        image = Gtk.Image.new_from_gicon(icon, Gtk.IconSize.BUTTON)
        button_settings.add(image)
        self.hb.pack_end(button_settings)

        self.builder = Gtk.Builder()
        self.builder.add_from_file("popovermenu_layout.xml")
        pom_options = self.builder.get_object("pom_options")
        button_settings.set_popover(pom_options)
        #self.builder.connect_signals(self) #Not needed because of using actions?

        app.add_window(self.window)

        #Connects to the action. The first part of the XML name is left away:
        #<property name="action-name">app.print</property>
        #becomes simply "print".
        action_print = Gio.SimpleAction.new("print", None)
        action_print.connect("activate", self.print_something)
        app.add_action(action_print)

        #app.toggle becomes -> toggle
        action_toggle = Gio.SimpleAction.new_stateful("toggle", None, GLib.Variant.new_boolean(False))
        action_toggle.connect("change-state", self.toggle_toggled)
        app.add_action(action_toggle)

        btn = Gtk.Button("Button")
        self.window.add(btn)
        self.window.show_all()

    def print_something(self, action, variable):
        print("something")

    def toggle_toggled(self, action, state):
        action.set_state(state)
        Gtk.Settings.get_default().set_property("gtk-application-prefer-dark-theme", state)

    def on_action_quit_activated(self, action):
        self.app.quit()


if __name__ == "__main__":
    """
    Creates an instance of the MainApplication class that inherits from
    Gtk.Application.
    """
    app = MainApplication()
    app.run(sys.argv)

和菜单的 XML 文件：

<interface>
    <object class="GtkPopoverMenu" id ="pom_options">
      <child>
        <object class="GtkBox">
          <property name="visible">True</property>
          <property name="margin">10</property>
          <property name="orientation">vertical</property>
          <child>
            <object class="GtkModelButton" id="mb_print">
              <property name="visible">True</property>
              <property name="action-name">app.print</property>
              <property name="can_focus">True</property>
              <property name="receives_default">True</property>
              <property name="label" translatable="yes">Print</property>
            </object>
          </child>
          <child>
            <object class="GtkModelButton" id="mp_toggle">
              <property name="visible">True</property>
              <property name="action-name">app.toggle</property>
              <property name="can_focus">True</property>
              <property name="receives_default">True</property>
              <property name="label" translatable="yes">Night Mode</property>
            </object>
          </child>
        </object>
      </child>
    </object>
</interface>
于 2015-07-01T11:43:59.020 回答