Perl Gtk无法创建抽象(非实例化)类型`GtkBox'的实例

Question

我正在尝试一个简单的Perl GtK,gui只包含一个窗口和一个垂直框.我得到一个分段错误,在此之前有一个警告:"无法创建抽象(非实例化)类型的实例'GtkBox'"

GUI是:

<?xml version="1.0" encoding="UTF-8"?>
<interface>
  <!-- interface-requires gtk+ 3.0 -->
  <object class="GtkWindow" id="window1">
    <property name="can_focus">False</property>
    <property name="title" translatable="yes">Text to EPUB</property>
    <child>
      <object class="GtkBox" id="box1">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <property name="orientation">vertical</property>
        <child>
          <placeholder/>
        </child>
        <child>
          <placeholder/>
        </child>
      </object>
    </child>
  </object>
</interface>

代码是:

#!/usr/bin/perl
use warnings;
use strict;

use File::Spec::Functions qw(rel2abs);
use File::Basename;
use File::Copy;
use Glib;
use Gtk2 '-init';

my $basedir = dirname(rel2abs($0));

my $guifile = "$basedir/txt2epub1.gui";

print "GUI file: $guifile\n";
my $builder = Gtk2::Builder->new();
$builder->add_from_file($guifile) or die "Couldn't read $guifile";
$builder->connect_signals( undef );


my $window = $builder->get_object("window1") or die "Can't open main window";

$window->show_all();

Gtk2->main();

# Callbacks
sub cb_window1_destroy {
    Gtk2->main_quit();
    exit;
}

Answer 1

xml文件包含以下行:

<!-- interface-requires gtk+ 3.0 -->

但是你的Perl脚本有:

use Gtk2 '-init';

看起来您正在尝试使用Gtk2库加载使用Gtk3创建的文件.