How to remove Close button from window title bar?

[bbanelli]

Greetings,

I think I've found a very irritating "feature" only manifesting on Linux. Hopefully, maybe I'm just doing something wrong, but...

PB 5.31, Ubuntu 12.04

Code: Select all

If OpenWindow(0, 0, 0, 320, 240, "Window 1", #PB_Window_ScreenCentered|#PB_Window_SystemMenu)
  If OpenWindow(1, 0, 0, 240, 120, "Window 2", #PB_Window_Tool|#PB_Window_WindowCentered,WindowID(0))
    DisableWindow(0,1)
    SetActiveWindow(1)
    ButtonGadget(0, 60, 40, 120, 25, "Close Window 2")
  EndIf
  Repeat
    Event = WaitWindowEvent()
    Select Event
      Case #PB_Event_Gadget
        Select EventGadget()
          Case 0 : CloseWindow(1) : DisableWindow(0,0) : SetActiveWindow(0)
        EndSelect
    EndSelect
  Until Event = #PB_Event_CloseWindow
EndIf

End

So, if you click on 'x' button on Linux second window, whole program gets terminated. Which is logical, but the bug is actually related to the fact that Close button actually exists in other window; the same button that gets removed by #PB_Window_Tool on Windows/OSX.

This code partially settles the problem:

Code: Select all

If OpenWindow(0, 0, 0, 320, 240, "Window 1", #PB_Window_ScreenCentered|#PB_Window_SystemMenu)
  If OpenWindow(1, 0, 0, 240, 120, "Window 2", #PB_Window_WindowCentered,WindowID(0))
    DisableWindow(0,1)
    SetActiveWindow(1)
    ButtonGadget(0, 60, 40, 120, 25, "Close Window 2")
  EndIf
  Repeat
    Event = WaitWindowEvent()
    Window = EventWindow()
    Select Event
      Case #PB_Event_Gadget
        Select EventGadget()
          Case 0 : CloseWindow(1) : DisableWindow(0,0) : SetActiveWindow(0)
        EndSelect
      Case #PB_Event_CloseWindow
        If Window = 0
          End
        ElseIf Window = 1
          CloseWindow(1)
          DisableWindow(0,0)
          SetActiveWindow(0)
        EndIf
    EndSelect
  Until 0
EndIf

End

Is it really impossible to remove Close button in native PureBasic code on Linux?

[Shardik]

It depends on the Window Manager of your Linux distribution whether it is possible to remove the close button from a window's title bar with gtk_window_set_deletable():

By default, windows have a close button in the window frame. Some window managers allow GTK+ to disable this button. If you set the deletable property to FALSE using this function, GTK+ will do its best to convince the window manager not to show a close button. Depending on the system, this function may not have any effect when called on a window that is already visible, so you should call it before calling gtk_window_show().

I have tested your modified 1st example below successfully with these Linux distributions (no close button in Window 2):
- ElementaryOS 0.2 x86 with Pantheon
- Fedora 20 x86 with Gnome 3
- Kubuntu 10.04 x86 with KDE
- Kubuntu 14.04 x86 with KDE
- Linux Mint 17 x86 with Cinnamon
- OpenSuse 11.1 x86 with KDE (reported by Vera)
- PearOS 8 x86 with heavily modified Gnome 3
- Xubuntu 14.04 x86 with Xfce (a "+" button is displayed instead of an "x" button in Window 2 but it doesn't close Window 2!)

It doesn't work on these distributions (Close button is still displayed and operational):
- andLinux/Kubuntu 9.04 x86 with KDE (running with a modified CoLinux kernel as task in Windows XP SP3)
- Bodhi Linux 2.4.0 with Enlightenment 17
- Lubuntu 14.04 x86 with LXDE
- Ubuntu 10.04 x86 with Gnome 2
- Ubuntu 14.04 x86 with Unity

Code: Select all

CompilerIf #PB_Compiler_OS = #PB_OS_Linux
  Import ""
    gtk_window_set_deletable(*Window.GtkWindow, Setting.I)
  EndImport
CompilerEndIf

If OpenWindow(0, 0, 0, 320, 240, "Window 1", #PB_Window_ScreenCentered|#PB_Window_SystemMenu)
  If OpenWindow(1, 0, 0, 240, 120, "Window 2", #PB_Window_Tool|#PB_Window_WindowCentered,WindowID(0))
    DisableWindow(0,1)

    CompilerIf #PB_Compiler_OS = #PB_OS_Linux
      gtk_window_set_deletable(WindowID(1), #False)
      gtk_widget_show_(WindowID(1))
    CompilerEndIf

    SetActiveWindow(1)
    ButtonGadget(0, 60, 40, 120, 25, "Close Window 2")
  EndIf
  Repeat
    Event = WaitWindowEvent()
    Select Event
      Case #PB_Event_Gadget
        Select EventGadget()
          Case 0 : CloseWindow(1) : DisableWindow(0,0) : SetActiveWindow(0)
        EndSelect
    EndSelect
  Until Event = #PB_Event_CloseWindow
EndIf

End

[Vera]

~ thanks

No x-button showing up on my distro:
- Linux Suse 11.1 x86 with KDE

[bbanelli]

It depends on the Window Manager of your Linux distribution whether it is possible to remove the close button from a window's title bar with gtk_window_set_deletable():

By default, windows have a close button in the window frame. Some window managers allow GTK+ to disable this button. If you set the deletable property to FALSE using this function, GTK+ will do its best to convince the window manager not to show a close button. Depending on the system, this function may not have any effect when called on a window that is already visible, so you should call it before calling gtk_window_show().

Hi Shardik,

thank you once again for very detailed explanation and help!

I have tested your modified 1st example below successfully with these Linux distributions (no close button in Window 2):
- ElementaryOS 0.2 x86 with Pantheon
- Fedora 20 x86 with Gnome 3
- Kubuntu 10.04 x86 with KDE
- Kubuntu 14.04 x86 with KDE
- Linux Mint 17 x86 with Cinnamon
- OpenSuse 11.1 x86 with KDE (reported by Vera)
- PearOS 8 x86 with heavily modified Gnome 3
- Xubuntu 14.04 x86 with Xfce (a "+" button is displayed instead of an "x" button in Window 2 but it doesn't close Window 2!)

It works for me on:
- Ubuntu 12.04 LTS x86 Unity
- Ubuntu 12.04 LTS x86 Gnome
- Ubuntu 12.04 LTS x64 Unity
- Ubuntu 12.04 LTS x64 Gnome

Unity

Code: Select all

bubba@ubuntu-vb:~$ echo $DESKTOP_SESSION
ubuntu-2d
bubba@ubuntu-vb:~$ echo $XDG_CURRENT_DESKTOP
Unity

Gnome

Code: Select all

bubba@ubuntu-vb:~$ echo $DESKTOP_SESSION
gnome-classic
bubba@ubuntu-vb:~$ echo $XDG_CURRENT_DESKTOP
GNOME

Which makes me wonder...

It doesn't work on these distributions (Close button is still displayed and operational):
- Ubuntu 10.04 x86 with Gnome 2
- Ubuntu 14.04 x86 with Unity

Why isn't it working on these two for you?

In any case, perhaps a review of documentation should be in order, since #PB_Window_Tool could have a Linux remark within it?

[Shardik]

It works for me on:
- Ubuntu 12.04 LTS x86 Unity
- Ubuntu 12.04 LTS x86 Gnome
- Ubuntu 12.04 LTS x64 Unity
- Ubuntu 12.04 LTS x64 Gnome

Which makes me wonder...

Code: Select all

It doesn't work on these distributions (Close button is still displayed and operational):
- Ubuntu 10.04 x86 with Gnome 2
- Ubuntu 14.04 x86 with Unity

Why isn't it working on these two for you?

I have also done some tests on Ubuntu 12.04 x86 and it seems to depend on the type of window manager with which you sign on. On my Ubuntu 12.04 x86 installation I have the choice between 4 window managers to use for sign on and it seems that those with 3D features don't allow to remove the close button:
[-] Ubuntu
[+] Ubuntu 2D
[-] GNOME Classic
[+] GNOME Classic (No effects)

In the tests of my previous posting I always used the default window manager for sign on. So for Ubuntu I always used Unity (with 3D features) whereas you used the 2D version...

[bbanelli]

I have also done some tests on Ubuntu 12.04 x86 and it seems to depend on the type of window manager with which you sign on. On my Ubuntu 12.04 x86 installation I have the choice between 4 window managers to use for sign on and it seems that those with 3D features don't allow to remove the close button:
[-] Ubuntu
[+] Ubuntu 2D
[-] GNOME Classic
[+] GNOME Classic (No effects)

In the tests of my previous posting I always used the default window manager for sign on. So for Ubuntu I always used Unity (with 3D features) whereas you used the 2D version...

OK, got it for Unity, but GNOME classic works for me on Ubuntu 12.04 LTS x86?!



This really makes me troubled since I plan to publish software and Linux seems to be quite quirky regarding this GTK stuff. I initially thought that this was owing to the PureBasic, but it seems GTK is inconsistent with itself to begin with...