Question

我正在尝试使用gtk＃和opengl编写一个简单的基本建模程序。为了能够同时使用gtk gui和opengl，我正在使用glwidget。最近我遇到了在同一个vbox中同时拥有菜单栏和glwidget的问题（它们位于不同的插槽中，但是相同的vbox）。这是我的代码：

//MainWindow.cs
using System;
using Gtk;
using CubeGameModeler;
using OpenTK;
using OpenTK.Graphics.OpenGL;
using GLib;

public partial class MainWindow: Gtk.Window
{   
    public MainWindow (): base (Gtk.WindowType.Toplevel)
    {
        Build ();
    }
    protected void OnDeleteEvent (object sender, DeleteEventArgs a)
    {
        Application.Quit ();
        a.RetVal = true;
    }
    protected void OnExit (object sender, EventArgs e)
    {
        Application.Quit ();
    }
    protected void OnSaveAs (object sender, EventArgs e)
    {
        SaveWindow savewindow = new SaveWindow ();
        savewindow.Show ();
    }
    protected void OnSettings (object sender, EventArgs e)
    {
        SettingsWindow settingswindow = new SettingsWindow ();
        settingswindow.Show ();
    }
    protected void OnAbout (object sender, EventArgs e)
    {
        AboutWindow aboutwindow = new AboutWindow ();
        aboutwindow.Show ();
    }
    protected void OnOpen (object sender, EventArgs e)
    {
        OpenWindow openwindow = new OpenWindow ();
        openwindow.Show ();
    }
    protected void OnHelp (object sender, EventArgs e)
    {
        HelpWindow helpwindow = new HelpWindow ();
        helpwindow.Show ();
    }
    protected void glwidget2_RenderFrame (object sender, EventArgs e)
    {
        GL.Viewport (0, 0, 100, 100);
        GL.ClearColor (0.5f, 0.5f, 1.0f, 1.0f);
        GL.Clear (ClearBufferMask.ColorBufferBit);
        GL.MatrixMode (MatrixMode.Modelview);
        GL.LoadIdentity ();
    }

}

这是我的MainWindow.cs类中的代码。我并不担心opengl渲染，我只是想让窗口保持打开超过一瞬间。我不知道这是不是一个错误，或者它只是与我糟糕的笔记本电脑有关。我在Debian Wheezy i386上使用MonoDevelop。当我尝试运行程序时，它会打开一瞬间然后关闭。当我查看应用程序输出时，它就是这样说的：

Loaded assembly: /home/mprogrammer/Documents/Monodevelop_Projects/CubeGameModeler/CubeGameModeler/bin/Debug/CubeGameModeler.exe
Loaded assembly: /usr/lib/mono/gac/gtk-sharp/2.12.0.0__35e10195dab3c99f/gtk-sharp.dll [External]
Loaded assembly: /usr/lib/mono/gac/glib-sharp/2.12.0.0__35e10195dab3c99f/glib-sharp.dll [External]
Loaded assembly: /usr/lib/mono/gac/atk-sharp/2.12.0.0__35e10195dab3c99f/atk-sharp.dll [External]
Loaded assembly: /usr/lib/mono/gac/System/4.0.0.0__b77a5c561934e089/System.dll [External]
Loaded assembly: /usr/lib/mono/gac/gdk-sharp/2.12.0.0__35e10195dab3c99f/gdk-sharp.dll [External]
Loaded assembly: /usr/lib/mono/gac/Mono.Posix/4.0.0.0__0738eb9f132ed756/Mono.Posix.dll [External]
Loaded assembly: /home/mprogrammer/Documents/Monodevelop_Projects/CubeGameModeler/CubeGameModeler/bin/Debug/OpenTK.dll [External]
Loaded assembly: /usr/lib/mono/gac/System.Drawing/4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll [External]
Stacktrace:

  at (wrapper managed-to-native) Gtk.Application.gtk_main () <IL 0x00022, 0xffffffff>
  at Gtk.Application.Run () <IL 0x00000, 0x0001f>
  at CubeGameModeler.MainClass.Main (string[]) [0x00011] in /home/mprogrammer/Documents/Monodevelop_Projects/CubeGameModeler/CubeGameModeler/Main.cs:13
  at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) <IL 0x00050, 0xffffffff>

Native stacktrace:

    /usr/bin/mono() [0x80e863d]
    /usr/bin/mono() [0x8128bac]
    /usr/bin/mono() [0x8064d1f]
    [0xb76f240c]
    /lib/i386-linux-gnu/i686/cmov/libpthread.so.0(__pthread_mutex_lock+0x1d) [0xb769618d]
    /usr/lib/i386-linux-gnu/libX11.so.6(+0x2999d) [0xb64d599d]
    [0x156]

Debug info from gdb:


=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

我已经通过反复试验确定问题出在菜单栏上，因为如果我把它留在窗口上，但是让它不可见，那么glwidget没有问题，程序继续运行。
如果需要更多信息，请告诉我。

Answer 1

我遇到了同样的问题。而且不仅有菜单，还有Button和Entry小部件。我找到了解决问题的方法。在程序启动时初始化工具包为我解决了问题。这是代码：

public static void Main (string[] args)
{
  using(Init())
  {
    Application.Init ();
    MainWindow win = new MainWindow ();
    win.Show ();
    Application.Run ();      
  }
}

private static OpenTK.Toolkit Init()
{
  return Toolkit.Init(new ToolkitOptions
  {
      Backend = PlatformBackend.PreferNative
  });
}

Gtk＃菜单栏似乎与GLWidget冲突

1 个答案: