From 3c1f8cb1f5cbef0f7699110fd28027948e644c6f Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Sun, 22 Oct 2006 22:28:37 +0000
Subject: [PATCH] initial draft of wxCollapsiblePane (patch 1577412 by
 Francesco)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42259 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 build/bakefiles/files.bkl      |   3 +
 docs/changes.txt               |   1 +
 docs/latex/wx/collpane.tex     | 114 +++++++++++++
 include/wx/collpane.h          |  94 +++++++++++
 include/wx/generic/collpaneg.h | 115 +++++++++++++
 include/wx/gtk/collpane.h      |  77 +++++++++
 samples/collpane/collpane.bkl  |  13 ++
 samples/collpane/collpane.cpp  | 269 +++++++++++++++++++++++++++++
 src/generic/aboutdlgg.cpp      |  13 +-
 src/generic/collpaneg.cpp      | 213 +++++++++++++++++++++++
 src/gtk/collpane.cpp           | 298 +++++++++++++++++++++++++++++++++
 11 files changed, 1208 insertions(+), 2 deletions(-)
 create mode 100644 docs/latex/wx/collpane.tex
 create mode 100644 include/wx/collpane.h
 create mode 100644 include/wx/generic/collpaneg.h
 create mode 100644 include/wx/gtk/collpane.h
 create mode 100644 samples/collpane/collpane.bkl
 create mode 100644 samples/collpane/collpane.cpp
 create mode 100644 src/generic/collpaneg.cpp
 create mode 100644 src/gtk/collpane.cpp

diff --git a/build/bakefiles/files.bkl b/build/bakefiles/files.bkl
index 4522b5c657..e92a2b31cc 100644
--- a/build/bakefiles/files.bkl
+++ b/build/bakefiles/files.bkl
@@ -948,6 +948,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
 <set var="GTK_SRC" hints="files">
     <!-- Generic implementations used by wxGTK: -->
     src/generic/accel.cpp
+    src/generic/collpaneg.cpp
     src/generic/colrdlgg.cpp
     src/generic/dirdlgg.cpp
     src/generic/fdrepdlg.cpp
@@ -968,6 +969,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
     src/gtk/checklst.cpp
     src/gtk/choice.cpp
     src/gtk/colordlg.cpp
+    src/gtk/collpane.cpp
     src/gtk/combobox.cpp
     src/gtk/control.cpp
     src/gtk/clrpicker.cpp
@@ -1510,6 +1512,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
 </set>
 
 <set var="MSW_SRC" hints="files">
+    src/generic/collpaneg.cpp
     src/generic/statusbr.cpp
     src/generic/prntdlgg.cpp
     src/msw/accel.cpp
diff --git a/docs/changes.txt b/docs/changes.txt
index 7d21c120d3..5abcdf0672 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -71,6 +71,7 @@ All (GUI):
 - Reverted wxBuffered[Paint]DC to pre 2.7.1 state, added
   wxAutoBufferedPaintDC and wxAutoBufferedPaintDCFactory.
 - Renamed wxProgressDialog::UpdatePulse() to just Pulse()
+- Added wxCollapsiblePane (Francesco Montorsi)
 - Added wxSimpleHtmlListBox (Francesco Montorsi)
 
 Unix Ports:
diff --git a/docs/latex/wx/collpane.tex b/docs/latex/wx/collpane.tex
new file mode 100644
index 0000000000..40774f130f
--- /dev/null
+++ b/docs/latex/wx/collpane.tex
@@ -0,0 +1,114 @@
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Name:        collpane.tex
+%% Purpose:     wxCollapsiblePane documentation
+%% Author:      Francesco Montorsi
+%% Created:     2006-10-14
+%% RCS-ID:      $Id$
+%% Copyright:   (c) 2006 Francesco Montorsi
+%% License:     wxWindows license
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+
+
+\section{\class{wxCollapsiblePane}}\label{wxcollapsiblepane}
+
+A collapsable panel is a container with an embedded button-like control which can be
+used by the user to collapse or expand the pane's contents.
+
+\wxheading{Derived from}
+
+\helpref{wxControl}{wxcontrol}\\
+\helpref{wxWindow}{wxwindow}\\
+\helpref{wxEvtHandler}{wxevthandler}\\
+\helpref{wxObject}{wxobject}
+
+\wxheading{Include files}
+
+<wx/collpane.h>
+
+\wxheading{Window styles}
+
+There are no specific styles for this window.
+
+See also \helpref{window styles overview}{windowstyles}.
+
+\wxheading{See also}
+
+\helpref{wxPanel}{wxpanel}
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+
+
+\membersection{wxCollapsiblePane::wxCollapsiblePane}\label{wxcollapsiblepane}
+
+\func{}{wxCollapsiblePane}{\param{wxWindow *}{parent},\rtfsp
+\param{wxWindowID}{ id},\rtfsp
+\param{const wxString\& }{label},\rtfsp
+\param{const wxPoint\& }{pos = wxDefaultPosition},\rtfsp
+\param{const wxSize\& }{size = wxDefaultSize},\rtfsp
+\param{long}{ style = wxCP\_DEFAULT\_STYLE},\rtfsp
+\param{const wxValidator\& }{validator = wxDefaultValidator},
+\param{const wxString\& }{name = ``collapsiblePane"}}
+
+Initializes the object and calls \helpref{Create}{wxcollapsiblepanecreate} with
+all the parameters.
+
+
+\membersection{wxCollapsiblePane::Create}\label{wxcollapsiblepanecreate}
+
+\func{bool}{Create}{\param{wxWindow *}{parent},\rtfsp
+\param{wxWindowID}{ id},\rtfsp
+\param{const wxString\& }{label},\rtfsp
+\param{const wxPoint\& }{pos = wxDefaultPosition},\rtfsp
+\param{const wxSize\& }{size = wxDefaultSize},\rtfsp
+\param{long}{ style = wxCP\_DEFAULT\_STYLE},\rtfsp
+\param{const wxValidator\& }{validator = wxDefaultValidator},
+\param{const wxString\& }{name = ``colourpickerctrl"}}
+
+\wxheading{Parameters}
+
+\docparam{parent}{Parent window, must not be non-\texttt{NULL}.}
+
+\docparam{id}{The identifier for the control.}
+
+\docparam{label}{The initial label shown in the button which allows the user to expand or collapse the pane window.}
+
+\docparam{pos}{Initial position.}
+
+\docparam{size}{Initial size.}
+
+\docparam{style}{The window style, see {\tt wxCP\_*} flags.}
+
+\docparam{validator}{Validator which can be used for additional date checks.}
+
+\docparam{name}{Control name.}
+
+\wxheading{Return value}
+
+\true if the control was successfully created or \false if creation failed.
+
+
+\membersection{wxCollapsiblePane::IsCollapsed}\label{wxcollapsiblepaneiscollapsed}
+
+\constfunc{bool}{IsCollapsed}{\void}
+
+Returns \true if the pane window is currently hidden.
+
+
+
+\membersection{wxCollapsiblePane::Collapse}\label{wxcollapsiblepanecollapse}
+
+\func{void}{Collapse}{\param{bool }{collapse = true}}
+
+Collapses or expands the pane window.
+
+
+
+\membersection{wxCollapsiblePane::Expand}\label{wxcollapsiblepaneexpand}
+
+\func{void}{Expand}{\void}
+
+Equivalent to {\tt Collapse(false)}.
+
+
diff --git a/include/wx/collpane.h b/include/wx/collpane.h
new file mode 100644
index 0000000000..002e5a3e21
--- /dev/null
+++ b/include/wx/collpane.h
@@ -0,0 +1,94 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/collpane.h
+// Purpose:     wxCollapsiblePane
+// Author:      Francesco Montorsi
+// Modified by:
+// Created:     8/10/2006
+// RCS-ID:      $Id$
+// Copyright:   (c) Francesco Montorsi
+// Licence:     wxWindows Licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_COLLAPSABLE_PANE_H_BASE_
+#define _WX_COLLAPSABLE_PANE_H_BASE_
+
+#include "wx/control.h"
+
+
+// ----------------------------------------------------------------------------
+// wxCollapsiblePaneBase: interface for wxCollapsiblePane
+// ----------------------------------------------------------------------------
+
+#define wxCP_DEFAULT_STYLE          (0)
+
+class WXDLLEXPORT wxCollapsiblePaneBase : public wxControl
+{
+public:
+    wxCollapsiblePaneBase() {}
+
+    virtual void Expand()
+        { Collapse(false); }
+
+    virtual void Collapse(bool collapse = true) = 0;
+    virtual bool IsCollapsed() const = 0;
+    virtual wxWindow *GetPane() const = 0;
+
+    virtual wxString GetLabel() const = 0;
+    virtual void SetLabel(const wxString &label) = 0;
+};
+
+
+// ----------------------------------------------------------------------------
+// event types and macros
+// ----------------------------------------------------------------------------
+
+BEGIN_DECLARE_EVENT_TYPES()
+    DECLARE_EXPORTED_EVENT_TYPE(WXDLLIMPEXP_CORE, wxEVT_COMMAND_COLLPANE_CHANGED, 1102)
+END_DECLARE_EVENT_TYPES()
+
+class WXDLLIMPEXP_CORE wxCollapsiblePaneEvent : public wxCommandEvent
+{
+public:
+    wxCollapsiblePaneEvent() {}
+    wxCollapsiblePaneEvent(wxObject *generator, int id, bool collapsed)
+        : wxCommandEvent(wxEVT_COMMAND_COLLPANE_CHANGED, id),
+        m_bCollapsed(collapsed)
+    {
+        SetEventObject(generator);
+    }
+
+    bool GetCollapsed() const { return m_bCollapsed; }
+    void SetCollapsed(bool c) { m_bCollapsed = c; }
+
+
+    // default copy ctor, assignment operator and dtor are ok
+    virtual wxEvent *Clone() const { return new wxCollapsiblePaneEvent(*this); }
+
+private:
+    bool m_bCollapsed;
+
+    DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxCollapsiblePaneEvent)
+};
+
+// ----------------------------------------------------------------------------
+// event types and macros
+// ----------------------------------------------------------------------------
+
+typedef void (wxEvtHandler::*wxCollapsiblePaneEventFunction)(wxCollapsiblePaneEvent&);
+
+#define wxCollapsiblePaneEventHandler(func) \
+    (wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxCollapsiblePaneEventFunction, &func)
+
+#define EVT_COLLAPSIBLEPANE_CHANGED(id, fn) \
+    wx__DECLARE_EVT1(wxEVT_COMMAND_COLLPANE_CHANGED, id, wxCollapsiblePaneEventFunction(fn))
+
+
+#if defined(__WXGTK24__)
+    #include "wx/gtk/collpane.h"
+#else
+    #include "wx/generic/collpaneg.h"
+    #define wxCollapsiblePane   wxGenericCollapsiblePane
+#endif
+
+#endif
+    // _WX_COLLAPSABLE_PANE_H_BASE_
diff --git a/include/wx/generic/collpaneg.h b/include/wx/generic/collpaneg.h
new file mode 100644
index 0000000000..32f26c17da
--- /dev/null
+++ b/include/wx/generic/collpaneg.h
@@ -0,0 +1,115 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/generic/collpaneg.h
+// Purpose:     wxGenericCollapsiblePane
+// Author:      Francesco Montorsi
+// Modified by:
+// Created:     8/10/2006
+// RCS-ID:      $Id$
+// Copyright:   (c) Francesco Montorsi
+// Licence:     wxWindows Licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_COLLAPSABLE_PANE_H_GENERIC_
+#define _WX_COLLAPSABLE_PANE_H_GENERIC_
+
+#include "wx/button.h"
+
+
+// the ID of the wxButton used to collapse/expand the panel
+#define wxCP_BUTTON_ID      12356
+
+// the number of pixels to leave between the button and the static line and
+// between the button and the pane
+#define wxCP_MARGIN         10
+
+// forward declared
+class WXDLLEXPORT wxStaticLine;
+
+// class name
+extern WXDLLEXPORT_DATA(const wxChar) wxGenericCollapsiblePaneNameStr[];
+
+
+
+// ----------------------------------------------------------------------------
+// wxGenericCollapsiblePane
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxGenericCollapsiblePane : public wxCollapsiblePaneBase
+{
+public:
+    wxGenericCollapsiblePane() { Init(); }
+
+    wxGenericCollapsiblePane(wxWindow *parent,
+                        wxWindowID winid,
+                        const wxString& label,
+                        const wxPoint& pos = wxDefaultPosition,
+                        const wxSize& size = wxDefaultSize,
+                        long style = wxTAB_TRAVERSAL | wxNO_BORDER,
+                        const wxValidator& val = wxDefaultValidator,
+                        const wxString& name = wxGenericCollapsiblePaneNameStr)
+    {
+        Init();
+
+        Create(parent, winid, label, pos, size, style, val, name);
+    }
+
+    void Init()
+    {
+        m_pButton = NULL;
+        m_pStatLine = NULL;
+        m_pPane = NULL;
+    }
+
+    bool Create(wxWindow *parent,
+                wxWindowID winid,
+                const wxString& label,
+                const wxPoint& pos = wxDefaultPosition,
+                const wxSize& size = wxDefaultSize,
+                long style = wxTAB_TRAVERSAL | wxNO_BORDER,
+                const wxValidator& val = wxDefaultValidator,
+                const wxString& name = wxGenericCollapsiblePaneNameStr);
+
+
+public:     // public API
+
+    void Collapse(bool collapse = true);
+    void SetLabel(const wxString &label);
+
+    bool IsCollapsed() const
+        { return m_pPane==NULL || !m_pPane->IsShown(); }
+    wxWindow *GetPane() const
+        { return m_pPane; }
+    wxString GetLabel() const
+        { return m_strLabel; }
+
+    wxWindow *GetTopLevelParent();
+
+public:         // event handlers
+
+    void OnButton(wxCommandEvent &ev);
+    void OnSize(wxSizeEvent &ev);
+
+protected:      // internal utils
+
+    void LayoutChildren();
+
+    wxString GetBtnLabel() const;
+    virtual wxSize DoGetBestSize() const;
+
+protected:
+
+    wxButton *m_pButton;
+    wxStaticLine *m_pStatLine;
+    wxWindow *m_pPane;
+
+    // the button label without ">>" or "<<"
+    wxString m_strLabel;
+
+private:
+    DECLARE_DYNAMIC_CLASS(wxGenericCollapsiblePane)
+    DECLARE_EVENT_TABLE()
+};
+
+
+#endif
+    // _WX_COLLAPSABLE_PANE_H_GENERIC_
diff --git a/include/wx/gtk/collpane.h b/include/wx/gtk/collpane.h
new file mode 100644
index 0000000000..1158b65a99
--- /dev/null
+++ b/include/wx/gtk/collpane.h
@@ -0,0 +1,77 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/gtk/collpane.h
+// Purpose:     wxCollapsiblePane
+// Author:      Francesco Montorsi
+// Modified by:
+// Created:     8/10/2006
+// RCS-ID:      $Id$
+// Copyright:   (c) Francesco Montorsi
+// Licence:     wxWindows Licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_COLLAPSABLE_PANEL_H_GTK_
+#define _WX_COLLAPSABLE_PANEL_H_GTK_
+
+#include "wx/generic/collpaneg.h"
+
+extern WXDLLEXPORT_DATA(const wxChar) wxCollapsiblePaneNameStr[];
+
+// ----------------------------------------------------------------------------
+// wxCollapsiblePane
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxCollapsiblePane : public wxGenericCollapsiblePane
+{
+public:
+    wxCollapsiblePane() { Init(); }
+
+    wxCollapsiblePane(wxWindow *parent,
+                        wxWindowID winid,
+                        const wxString& label,
+                        const wxPoint& pos = wxDefaultPosition,
+                        const wxSize& size = wxDefaultSize,
+                        long style = wxTAB_TRAVERSAL | wxNO_BORDER,
+                        const wxValidator& val = wxDefaultValidator,
+                        const wxString& name = wxCollapsiblePaneNameStr)
+    {
+        Init();
+
+        Create(parent, winid, label, pos, size, style, val, name);
+    }
+
+    void Init()
+    {
+        m_bIgnoreNextChange = false;
+    }
+
+    bool Create(wxWindow *parent,
+                wxWindowID winid,
+                const wxString& label,
+                const wxPoint& pos = wxDefaultPosition,
+                const wxSize& size = wxDefaultSize,
+                long style = wxTAB_TRAVERSAL | wxNO_BORDER,
+                const wxValidator& val = wxDefaultValidator,
+                const wxString& name = wxCollapsiblePaneNameStr);
+
+public:     // public API
+
+    wxSize DoGetBestSize() const;
+    void Collapse(bool collapse = true);
+    bool IsCollapsed() const;
+    void SetLabel(const wxString &str);
+
+    void OnSize(wxSizeEvent&);
+
+public:     // used by GTK callbacks
+
+    bool m_bIgnoreNextChange;
+    wxSize m_szCollapsed;
+
+private:
+    DECLARE_DYNAMIC_CLASS(wxCollapsiblePane)
+    DECLARE_EVENT_TABLE()
+};
+
+
+#endif
+    // _WX_COLLAPSABLE_PANEL_H_GTK_
diff --git a/samples/collpane/collpane.bkl b/samples/collpane/collpane.bkl
new file mode 100644
index 0000000000..631dfd905e
--- /dev/null
+++ b/samples/collpane/collpane.bkl
@@ -0,0 +1,13 @@
+<?xml version="1.0" ?>
+<makefile>
+
+    <include file="../../build/bakefiles/common_samples.bkl"/>
+
+    <exe id="collpane" template="wx_sample" template_append="wx_append">
+        <sources>collpane.cpp</sources>
+        <wx-lib>core</wx-lib>
+        <wx-lib>base</wx-lib>
+        <win32-res>../sample.rc</win32-res>
+    </exe>
+
+</makefile>
diff --git a/samples/collpane/collpane.cpp b/samples/collpane/collpane.cpp
new file mode 100644
index 0000000000..f693d52d71
--- /dev/null
+++ b/samples/collpane/collpane.cpp
@@ -0,0 +1,269 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        collpane.cpp
+// Purpose:     wxCollapsiblePane sample
+// Author:      Francesco Montorsi
+// Modified by:
+// Created:     14/10/06
+// RCS-ID:      $Id$
+// Copyright:   (c) Francesco Montorsi
+// Licence:     wxWindows license
+/////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// For compilers that support precompilation, includes "wx/wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+    #include "wx/log.h"
+
+    #include "wx/app.h"
+    #include "wx/frame.h"
+
+    #include "wx/scrolwin.h"
+    #include "wx/menu.h"
+
+    #include "wx/textdlg.h"       // for wxGetTextFromUser
+#endif
+
+#include "wx/collpane.h"
+#include "wx/sizer.h"
+#include "wx/stattext.h"
+#include "wx/clrpicker.h"
+#include "wx/filepicker.h"
+#include "wx/fontpicker.h"
+
+// ----------------------------------------------------------------------------
+// constants
+// ----------------------------------------------------------------------------
+
+// ID for the menu commands
+enum
+{
+    PANE_COLLAPSE,
+    PANE_EXPAND,
+    PANE_SETLABEL,
+    PANE_SHOWDLG,
+    PANE_QUIT = wxID_EXIT
+};
+
+
+// ----------------------------------------------------------------------------
+// our classes
+// ----------------------------------------------------------------------------
+
+class MyApp: public wxApp
+{
+public:
+    MyApp() { }
+
+    virtual bool OnInit();
+
+    DECLARE_NO_COPY_CLASS(MyApp)
+};
+
+class MyFrame: public wxFrame
+{
+public:
+    MyFrame();
+    virtual ~MyFrame();
+
+    // Menu commands
+    void OnCollapse(wxCommandEvent& event);
+    void OnExpand(wxCommandEvent& event);
+    void OnSetLabel(wxCommandEvent& event);
+    void OnShowDialog(wxCommandEvent& event);
+    void Quit(wxCommandEvent& event);
+
+    // Menu command update functions
+    void UpdateUI(wxUpdateUIEvent& event);
+
+private:
+    wxCollapsiblePane *m_collPane;
+
+    DECLARE_EVENT_TABLE()
+    DECLARE_NO_COPY_CLASS(MyFrame)
+};
+
+class MyDialog : public wxDialog
+{
+public:
+    MyDialog(wxFrame *parent);
+    void OnToggleStatus(wxCommandEvent& WXUNUSED(ev));
+
+private:
+    wxCollapsiblePane *m_collPane;
+
+    DECLARE_EVENT_TABLE()
+    DECLARE_NO_COPY_CLASS(MyDialog)
+};
+
+
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// MyApp
+// ----------------------------------------------------------------------------
+
+IMPLEMENT_APP(MyApp)
+
+bool MyApp::OnInit()
+{
+    // create and show the main frame
+    MyFrame* frame = new MyFrame;
+
+    frame->Show(true);
+
+    return true;
+}
+
+// ----------------------------------------------------------------------------
+// MyFrame
+// ----------------------------------------------------------------------------
+
+BEGIN_EVENT_TABLE(MyFrame, wxFrame)
+    EVT_MENU(PANE_COLLAPSE, MyFrame::OnCollapse)
+    EVT_MENU(PANE_EXPAND, MyFrame::OnExpand)
+    EVT_MENU(PANE_SETLABEL, MyFrame::OnSetLabel)
+    EVT_MENU(PANE_SHOWDLG, MyFrame::OnShowDialog)
+    EVT_MENU(PANE_QUIT, MyFrame::Quit)
+
+    EVT_UPDATE_UI(wxID_ANY, MyFrame::UpdateUI)
+END_EVENT_TABLE()
+
+// My frame constructor
+MyFrame::MyFrame()
+       : wxFrame(NULL, wxID_ANY, _T("wxCollapsiblePane sample"),
+                 wxDefaultPosition, wxSize(420, 300),
+                 wxDEFAULT_FRAME_STYLE | wxNO_FULL_REPAINT_ON_RESIZE)
+{
+#if wxUSE_STATUSBAR
+    CreateStatusBar(2);
+#endif // wxUSE_STATUSBAR
+
+    // Make a menubar
+    wxMenu *paneMenu = new wxMenu;
+    paneMenu->Append(PANE_COLLAPSE, _T("Collapse\tCtrl-C"));
+    paneMenu->Append(PANE_EXPAND, _T("Expand\tCtrl-E"));
+    paneMenu->AppendSeparator();
+    paneMenu->Append(PANE_SETLABEL, _T("Set label...\tCtrl-S"));
+    paneMenu->AppendSeparator();
+    paneMenu->Append(PANE_SHOWDLG, _T("Show dialog...\tCtrl-S"));
+    paneMenu->AppendSeparator();
+    paneMenu->Append(PANE_QUIT);
+
+    wxMenuBar *menuBar = new wxMenuBar;
+    menuBar->Append(paneMenu, _T("&Pane"));
+    SetMenuBar(menuBar);
+
+    m_collPane = new wxCollapsiblePane(this, -1, wxT("test!"));
+    wxWindow *win = m_collPane->GetPane();
+
+    new wxStaticText(win, -1, wxT("Static control with absolute coords"), wxPoint(10,2));
+    new wxStaticText(win, -1, wxT("Yet another one!"), wxPoint(30, 30));
+    new wxTextCtrl(win, -1, wxT("You can place anything you like inside a wxCollapsiblePane"),
+                   wxPoint(5, 60), wxSize(300, -1));
+}
+
+MyFrame::~MyFrame()
+{
+}
+
+// menu command handlers
+
+void MyFrame::Quit(wxCommandEvent& WXUNUSED(event) )
+{
+    Close(true);
+}
+
+void MyFrame::OnCollapse(wxCommandEvent& WXUNUSED(event) )
+{
+    m_collPane->Collapse();
+}
+
+void MyFrame::OnExpand(wxCommandEvent& WXUNUSED(event) )
+{
+    m_collPane->Expand();
+}
+
+void MyFrame::OnSetLabel(wxCommandEvent& WXUNUSED(event) )
+{
+    wxString text = wxGetTextFromUser(wxT("Input the new label"));
+    m_collPane->SetLabel(text);
+}
+
+void MyFrame::OnShowDialog(wxCommandEvent& WXUNUSED(event) )
+{
+    MyDialog dlg(this);
+    dlg.ShowModal();
+}
+
+void MyFrame::UpdateUI(wxUpdateUIEvent& event)
+{
+    GetMenuBar()->Enable(PANE_COLLAPSE, !m_collPane->IsCollapsed());
+    GetMenuBar()->Enable(PANE_EXPAND, m_collPane->IsCollapsed());
+}
+
+// ----------------------------------------------------------------------------
+// MyDialog
+// ----------------------------------------------------------------------------
+
+enum
+{
+    PANEDLG_TOGGLESTATUS_BTN = wxID_HIGHEST
+};
+
+BEGIN_EVENT_TABLE(MyDialog, wxDialog)
+    EVT_BUTTON(PANEDLG_TOGGLESTATUS_BTN, MyDialog::OnToggleStatus)
+END_EVENT_TABLE()
+
+MyDialog::MyDialog(wxFrame *parent)
+                : wxDialog(parent, wxID_ANY, wxT("Test dialog"),
+                            wxDefaultPosition, wxDefaultSize,
+                            wxRESIZE_BORDER|wxDEFAULT_DIALOG_STYLE )
+{
+    wxSizer *sz = new wxBoxSizer(wxVERTICAL);
+    sz->Add(new wxStaticText(this, -1, 
+        wxT("This dialog allows you to test the wxCollapsiblePane control")),
+        0, wxALL, 5);
+    sz->Add(new wxButton(this, PANEDLG_TOGGLESTATUS_BTN, wxT("Change status")), 
+        1, wxGROW|wxALL, 5);
+    
+    m_collPane = new wxCollapsiblePane(this, -1, wxT("Click here for a surprise"));
+    sz->Add(m_collPane, 1, wxGROW|wxALL, 5);
+    sz->Add(new wxTextCtrl(this, -1, wxT("just a test")), 0, wxGROW|wxALL, 5);
+    sz->AddSpacer(10);
+    sz->Add(new wxButton(this, wxID_OK), 0, wxALIGN_RIGHT|wxALL, 5);
+
+    // now add test controls in the collapsible pane
+    wxWindow *win = m_collPane->GetPane();
+    wxSizer *paneSz = new wxGridSizer(2, 2, 5, 5);
+    paneSz->Add(new wxColourPickerCtrl(win, -1), 1, wxGROW|wxALL, 2);
+    paneSz->Add(new wxFontPickerCtrl(win, -1), 1, wxGROW|wxALL, 2);
+    paneSz->Add(new wxFilePickerCtrl(win, -1), 1, wxALL|wxALIGN_CENTER, 2);
+    paneSz->Add(new wxDirPickerCtrl(win, -1), 1, wxALL|wxALIGN_CENTER, 2);
+    win->SetSizer(paneSz);
+    paneSz->SetSizeHints(win);
+
+    SetSizer(sz);
+    sz->SetSizeHints(this);
+}
+
+void MyDialog::OnToggleStatus(wxCommandEvent& WXUNUSED(ev))
+{
+    m_collPane->Collapse(!m_collPane->IsCollapsed());
+}
+
diff --git a/src/generic/aboutdlgg.cpp b/src/generic/aboutdlgg.cpp
index a1237317f7..61f0db4470 100644
--- a/src/generic/aboutdlgg.cpp
+++ b/src/generic/aboutdlgg.cpp
@@ -36,6 +36,7 @@
 #include "wx/generic/aboutdlgg.h"
 
 #include "wx/hyperlink.h"
+#include "wx/collpane.h"
 
 // ============================================================================
 // implementation
@@ -101,7 +102,8 @@ wxIcon wxAboutDialogInfo::GetIcon() const
 bool wxGenericAboutDialog::Create(const wxAboutDialogInfo& info)
 {
     // TODO: should we use main frame as parent by default here?
-    if ( !wxDialog::Create(NULL, wxID_ANY, _("About ") + info.GetName()) )
+    if ( !wxDialog::Create(NULL, wxID_ANY, _("About ") + info.GetName(),
+                           wxDefaultPosition, wxDefaultSize, wxRESIZE_BORDER|wxDEFAULT_DIALOG_STYLE) )
         return false;
 
     m_sizerText = new wxBoxSizer(wxVERTICAL);
@@ -131,7 +133,14 @@ bool wxGenericAboutDialog::Create(const wxAboutDialogInfo& info)
 #endif // wxUSE_HYPERLINKCTRL/!wxUSE_HYPERLINKCTRL
     }
 
-    // TODO: add licence
+    // add licence
+    wxCollapsiblePane *licensepnl = new wxCollapsiblePane(this, wxID_ANY, wxT("License"));
+
+    new wxStaticText(licensepnl->GetPane(), wxID_ANY, info.GetLicence(),
+                     wxDefaultPosition, wxDefaultSize,
+                     wxALIGN_CENTRE);
+
+    m_sizerText->Add(licensepnl, wxSizerFlags(1).Expand().Border(wxBOTTOM));
 
     // TODO: add credits (developers, artists, doc writers, translators)
 
diff --git a/src/generic/collpaneg.cpp b/src/generic/collpaneg.cpp
new file mode 100644
index 0000000000..f8f7f3fcbc
--- /dev/null
+++ b/src/generic/collpaneg.cpp
@@ -0,0 +1,213 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        src/generic/collpaneg.cpp
+// Purpose:     wxGenericCollapsiblePane
+// Author:      Francesco Montorsi
+// Modified By:
+// Created:     8/10/2006
+// Id:          $Id$
+// Copyright:   (c) Francesco Montorsi
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+#include "wx/collpane.h"
+#include "wx/statline.h"
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+const wxChar wxGenericCollapsiblePaneNameStr[] = wxT("genericCollapsiblePane");
+
+//-----------------------------------------------------------------------------
+// wxGenericCollapsiblePane
+//-----------------------------------------------------------------------------
+
+DEFINE_EVENT_TYPE(wxEVT_COMMAND_COLLPANE_CHANGED)
+IMPLEMENT_DYNAMIC_CLASS(wxGenericCollapsiblePane, wxControl)
+IMPLEMENT_DYNAMIC_CLASS(wxCollapsiblePaneEvent, wxCommandEvent)
+
+BEGIN_EVENT_TABLE(wxGenericCollapsiblePane, wxControl)
+    EVT_BUTTON(wxCP_BUTTON_ID, wxGenericCollapsiblePane::OnButton)
+    EVT_SIZE(wxGenericCollapsiblePane::OnSize)
+END_EVENT_TABLE()
+
+
+bool wxGenericCollapsiblePane::Create( wxWindow *parent, wxWindowID id,
+                                        const wxString& label,
+                                        const wxPoint& pos,
+                                        const wxSize& size,
+                                        long style,
+                                        const wxValidator& val,
+                                        const wxString& name)
+{
+    if ( !wxControl::Create(parent, id, pos, size, style, val, name) )
+        return false;
+
+    m_strLabel = label;
+
+    // create children; their size & position is set in OnSize()
+    m_pButton = new wxButton(this, wxCP_BUTTON_ID, GetBtnLabel(), wxPoint(0, 0),
+                             wxDefaultSize, wxBU_EXACTFIT);
+    m_pStatLine = new wxStaticLine(this, wxID_ANY);
+    m_pPane = new wxWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxNO_BORDER);
+
+    // start as collapsed:
+    m_pPane->Hide();
+
+    //CacheBestSize(GetBestSize());
+    return true;
+}
+
+wxSize wxGenericCollapsiblePane::DoGetBestSize() const
+{
+    wxSize sz = m_pButton->GetBestSize();
+
+    // set width
+    sz.SetWidth( sz.GetWidth() + wxCP_MARGIN + m_pStatLine->GetBestSize().GetWidth() );
+    sz.SetWidth( wxMax(sz.GetWidth(), m_pPane->GetBestSize().GetWidth()) );
+
+    // when expanded, we need more vertical space
+    if (!IsCollapsed())
+        sz.SetHeight( sz.GetHeight() + wxCP_MARGIN + m_pPane->GetBestSize().GetHeight() );
+
+    return sz;
+}
+
+wxString wxGenericCollapsiblePane::GetBtnLabel() const
+{
+    if (IsCollapsed())
+        return m_strLabel + wxT(" >>");
+    return m_strLabel + wxT(" <<");
+}
+
+void wxGenericCollapsiblePane::Collapse(bool collapse)
+{
+    // optimization
+    if (IsCollapsed() == collapse)
+        return;
+
+    // update our state
+    m_pPane->Show(!collapse);
+
+    // update button label
+    // NB: this must be done after updating our "state"
+    m_pButton->SetLabel(GetBtnLabel());
+
+    // minimal size has priority over the best size so set here our min size
+    wxSize sz = GetBestSize();
+    SetMinSize(sz);
+    SetSize(sz);
+
+    wxWindow *top = GetTopLevelParent();
+    if (top)
+    {
+        // we've changed our size, thus our top level parent needs to relayout itself
+        top->Layout();
+
+        // FIXME: this makes wxGenericCollapsiblePane behave as the user expect but
+        //        maybe there are cases where this is unwanted!
+        if (top->GetSizer())
+#ifdef __WXGTK__
+        // FIXME: the SetSizeHints() call would be required also for GTK+ for the
+        //        expanded->collapsed transition.
+        //        Unfortunately if we enable this line, then the GTK+ top window
+        //        won't always be resized by the SetClientSize() call below!
+        //        As a side effect of this dirty fix, the minimal size for the
+        //        pane window is not set in GTK+ and the user can hide it shrinking
+        //        the "top" window...
+        if (IsCollapsed())
+#endif
+            top->GetSizer()->SetSizeHints(top);
+
+        if (IsCollapsed())
+        {
+            // NB: we need to use SetClientSize() and not SetSize() otherwise the size for
+            //     windows like e.g. wxFrames with wxMenubars won't be correctly set
+            top->SetClientSize(sz);
+        }
+        else
+        {
+            // force our parent to "fit", i.e. expand so that it can honour
+            // our minimal size
+            top->Fit();
+        }
+    }
+}
+
+wxWindow *wxGenericCollapsiblePane::GetTopLevelParent()
+{
+    wxWindow *parent = GetParent();
+    while (parent && !parent->IsTopLevel())
+        parent = parent->GetParent();
+
+    return parent;
+}
+
+void wxGenericCollapsiblePane::SetLabel(const wxString &label)
+{
+    m_strLabel = label;
+    m_pButton->SetLabel(GetBtnLabel());
+    m_pButton->SetBestFittingSize();
+
+    LayoutChildren();
+}
+
+void wxGenericCollapsiblePane::LayoutChildren()
+{
+    wxSize btnSz = m_pButton->GetSize();
+
+    // the button position & size are always ok...
+
+    // move & resize the static line
+    m_pStatLine->SetSize(btnSz.GetWidth() + wxCP_MARGIN, btnSz.GetHeight()/2,
+                         GetSize().GetWidth() - btnSz.GetWidth() - wxCP_MARGIN, -1,
+                         wxSIZE_USE_EXISTING);
+
+    // move & resize the container window
+    m_pPane->SetSize(0, btnSz.GetHeight() + wxCP_MARGIN,
+                     GetSize().GetWidth(), GetSize().GetHeight() - btnSz.GetHeight() - wxCP_MARGIN);
+}
+
+
+
+//-----------------------------------------------------------------------------
+// wxGenericCollapsiblePane - event handlers
+//-----------------------------------------------------------------------------
+
+void wxGenericCollapsiblePane::OnButton(wxCommandEvent &WXUNUSED(event))
+{
+    Collapse(!IsCollapsed());
+
+    // this change was generated by the user - send the event
+    wxCollapsiblePaneEvent ev(this, GetId(), IsCollapsed());
+    GetEventHandler()->ProcessEvent(ev);
+}
+
+void wxGenericCollapsiblePane::OnSize(wxSizeEvent& WXUNUSED(event))
+{
+#if 0       // for debug only
+    wxClientDC dc(this);
+    dc.SetPen(*wxBLACK_PEN);
+    dc.SetBrush(*wxTRANSPARENT_BRUSH);
+    dc.DrawRectangle(wxPoint(0,0), GetSize());
+    dc.SetPen(*wxRED_PEN);
+    dc.DrawRectangle(wxPoint(0,0), GetBestSize());
+#endif
+
+
+    if (!m_pButton || !m_pStatLine || !m_pPane)
+        return;     // we need to complete the creation first!
+
+    LayoutChildren();
+
+    // this is very important to make the pane window layout show correctly
+    m_pPane->Layout();
+}
+
diff --git a/src/gtk/collpane.cpp b/src/gtk/collpane.cpp
new file mode 100644
index 0000000000..263306affc
--- /dev/null
+++ b/src/gtk/collpane.cpp
@@ -0,0 +1,298 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        src/gtk/collpane.cpp
+// Purpose:     wxCollapsiblePane
+// Author:      Francesco Montorsi
+// Modified By:
+// Created:     8/10/2006
+// Id:          $Id$
+// Copyright:   (c) Francesco Montorsi
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __WXGTK24__
+
+#include "wx/collpane.h"
+#include <gtk/gtkexpander.h>
+#include <gtk/gtk.h>
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+
+/* DEBUG TIMER */
+class myTimer : public wxTimer
+{
+    wxCollapsiblePane *p;
+
+public:
+    myTimer(wxCollapsiblePane *pp) {p=pp;}
+
+    void Notify()
+    {
+        //wxLogDebug(wxT("%d"), p->IsCollapsed());
+
+        wxSize sz = p->GetBestSize();
+        wxLogDebug(wxT("our best size is now: %d-%d"), sz.GetWidth(), sz.GetHeight());
+    }
+};
+
+
+
+const wxChar wxCollapsiblePaneNameStr[] = wxT("CollapsiblePane");
+
+//-----------------------------------------------------------------------------
+// "notify::expanded" signal
+//-----------------------------------------------------------------------------
+
+extern "C" {
+
+static void gtk_collapsiblepane_expanded_callback (GObject    *object,
+                                                    GParamSpec *param_spec,
+                                                    wxCollapsiblePane *p)
+{
+    // NB: unlike for the "activate" signal, when this callback is called, if we try to
+    //     query the "collapsed" status through p->IsCollapsed(), we get the right value.
+    //     I.e. here p->IsCollapsed() will return false if this callback has been called
+    //     at the end of a collapsed->expanded transition and viceversa.
+    //     Inside the "activate" signal callback p->IsCollapsed() would return the wrong value!
+
+    wxLogDebug("gtk_collapsiblepane_expanded_callback - IsCollapsed says %d", p->IsCollapsed());
+
+    wxSize sz;
+    if (!p->IsCollapsed())
+    {
+        // unfortunately there's no clean way to retrieve the minimal size of the expanded pane
+        // in this handler or in other handlers for the signals generated by user clicks on the
+        // GtkExpander button: p->GetBestSize() or p->GetMinSize() would still return the size for
+        // the collapsed expander even if the collapsed->expanded transition has already been
+        // completed (this because GTK+ queues some resize calls which still must be processed).
+        // So, the only solution to correctly set the size hints for this window is to calculate
+        // the expanded size ourselves, without relying on p->Get[Best|Min]Size:
+        sz = p->GetMinSize();
+        sz.SetWidth( wxMax(sz.GetWidth(), p->GetPane()->GetMinSize().GetWidth()) );
+        sz.SetHeight( sz.GetHeight() + p->GetPane()->GetMinSize().GetHeight() + 10 );
+    }
+    else
+    {
+        // same problem described above: using p->Get[Best|Min]Size() here we would get the size
+        // of the control when it is expanded even if the expanded->collapsed transition should be
+        // complete now...
+        // So, we use the size cached at control-creation time...
+        sz = p->m_szCollapsed;
+    }
+
+    wxLogDebug(wxT("gtk_collapsiblepane_expanded_callback - my min size is now: %d-%d"),
+               sz.GetWidth(), sz.GetHeight());
+
+    // minimal size has priority over the best size so set here our min size
+    p->SetMinSize(sz);
+    p->SetSize(sz);
+
+    wxWindow *top = p->GetTopLevelParent();
+    if (top)
+    {
+        // we've changed our size, thus our top level parent needs to relayout itself
+        top->Layout();
+
+        // FIXME: this makes wxGenericCollapsiblePane behave as the user expect but
+        //        maybe there are cases where this is unwanted!
+        if (top->GetSizer())
+#ifdef __WXGTK__
+        // FIXME: the SetSizeHints() call would be required also for GTK+ for the
+        //        expanded->collapsed transition.
+        //        Unfortunately if we enable this line, then the GTK+ top window
+        //        won't always be resized by the SetClientSize() call below!
+        //        As a side effect of this dirty fix, the minimal size for the
+        //        pane window is not set in GTK+ and the user can hide it shrinking
+        //        the "top" window...
+        if (p->IsCollapsed())
+#endif
+            top->GetSizer()->SetSizeHints(top);
+
+        if (p->IsCollapsed())
+        {
+            // NB: we need to use SetClientSize() and not SetSize() otherwise the size for
+            //     windows like e.g. wxFrames with wxMenubars won't be correctly set
+            top->SetClientSize(sz);
+        }
+        else
+        {
+            // force our parent to "fit", i.e. expand so that it can honour
+            // our minimal size
+            top->Fit();
+        }
+    }
+
+    if (p->m_bIgnoreNextChange)
+    {
+        // change generated programmatically - do not send an event!
+        p->m_bIgnoreNextChange = false;
+        return;
+    }
+
+    // fire an event
+    wxCollapsiblePaneEvent ev(p, p->GetId(), p->IsCollapsed());
+    p->GetEventHandler()->ProcessEvent(ev);
+}
+}
+
+static void gtk_collapsiblepane_insert_callback( wxWindowGTK* parent, wxWindowGTK* child )
+{
+    // this callback should be used only once to insert the "pane" into
+    // the GtkExpander widget. wxGenericCollapsiblePane::DoAddChild() will check
+    // if it has been called only once (and in any case we would get a warning
+    // from the following call as GtkExpander is a GtkBin and can contain only a
+    // single child!).
+    gtk_container_add (GTK_CONTAINER (parent->m_widget), child->m_widget);
+}
+
+
+//-----------------------------------------------------------------------------
+// wxCollapsiblePane
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxCollapsiblePane, wxGenericCollapsiblePane)
+
+BEGIN_EVENT_TABLE(wxCollapsiblePane, wxGenericCollapsiblePane)
+    EVT_SIZE(wxCollapsiblePane::OnSize)
+END_EVENT_TABLE()
+
+bool wxCollapsiblePane::Create( wxWindow *parent, wxWindowID id,
+                                 const wxString& label,
+                                const wxPoint& pos,
+                                const wxSize& size,
+                                long style,
+                                const wxValidator& val,
+                                const wxString& name)
+{
+    if (gtk_check_version(2,4,0)) {wxASSERT(0);
+        return wxGenericCollapsiblePane::Create(parent, id, label, pos, size, style, val, name);}
+
+    m_needParent = true;
+    m_acceptsFocus = true;
+    m_bIgnoreNextChange = false;
+
+    if (!PreCreation( parent, pos, size ) ||
+         !wxControl::CreateBase(parent, id, pos, size, style, val, name))
+    {
+        wxFAIL_MSG( wxT("wxCollapsiblePane creation failed") );
+        return false;
+    }
+
+    m_widget = gtk_expander_new(label.c_str());
+
+    // see the gtk_collapsiblepane_expanded_callback comments to understand why we connect
+    // to the "notify::expanded" signal instead of the more common "activate" one
+    g_signal_connect(m_widget, "notify::expanded",
+                     G_CALLBACK(gtk_collapsiblepane_expanded_callback), this);
+
+    // before creating m_pPane, we need to makesure our own insert callback will be used
+    m_insertCallback = gtk_collapsiblepane_insert_callback;
+
+    // this the real "pane"
+    m_pPane = new wxWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxNO_BORDER);
+
+    gtk_widget_show( GTK_WIDGET(m_widget) );
+    m_parent->DoAddChild( this );
+
+    PostCreation(size);
+    //SetBestSize(size);
+
+    // remember the size of this control when it's collapsed
+    m_szCollapsed = GetBestSize();
+
+    /*
+    myTimer *t = new myTimer(this);
+    t->Start(2000);
+    */
+
+    return true;
+}
+
+wxSize wxCollapsiblePane::DoGetBestSize() const
+{
+    if (!gtk_check_version(2,4,0))
+    {
+        //return wxControl::DoGetBestSize();        // need not to cache the best size!
+
+        wxASSERT_MSG( m_widget, wxT("DoGetBestSize called before creation") );
+
+        GtkRequisition req;
+        req.width = 2;
+        req.height = 2;
+        (* GTK_WIDGET_CLASS( GTK_OBJECT_GET_CLASS(m_widget) )->size_request )
+                (m_widget, &req );
+
+        wxSize best(req.width, req.height);
+        //CacheBestSize(best);
+        return best;
+    }
+
+    return wxGenericCollapsiblePane::DoGetBestSize();
+}
+
+void wxCollapsiblePane::Collapse(bool collapse)
+{
+    if (!gtk_check_version(2,4,0))
+    {
+        // optimization
+        if (IsCollapsed() == collapse)
+            return;
+
+        // do not send event in next signal handler call
+        m_bIgnoreNextChange = true;
+        gtk_expander_set_expanded(GTK_EXPANDER(m_widget), !collapse);
+    }
+    else
+        wxGenericCollapsiblePane::Collapse(collapse);
+}
+
+bool wxCollapsiblePane::IsCollapsed() const
+{
+    if (!gtk_check_version(2,4,0))
+        return !gtk_expander_get_expanded(GTK_EXPANDER(m_widget));
+
+    return wxGenericCollapsiblePane::IsCollapsed();
+}
+
+void wxCollapsiblePane::SetLabel(const wxString &str)
+{
+    if (!gtk_check_version(2,4,0))
+        gtk_expander_set_label(GTK_EXPANDER(m_widget), str.c_str());
+    else
+        wxGenericCollapsiblePane::SetLabel(str);
+}
+
+void wxCollapsiblePane::OnSize(wxSizeEvent &ev)
+{
+#if 0       // for debug only
+    wxClientDC dc(this);
+    dc.SetPen(*wxBLACK_PEN);
+    dc.SetBrush(*wxTRANSPARENT_BRUSH);
+    dc.DrawRectangle(wxPoint(0,0), GetSize());
+    dc.SetPen(*wxRED_PEN);
+    dc.DrawRectangle(wxPoint(0,0), GetBestSize());
+#endif
+
+    //wxLogDebug(wxT("wxCollapsiblePane::OnSize"));
+
+    // here we need to resize the pane window otherwise, even if the GtkExpander container
+    // is expanded or shrinked, the pane window won't be updated!
+    m_pPane->SetSize(ev.GetSize());
+
+    // we need to explicitely call m_pPane->Layout() or else it won't correctly relayout
+    // (even if SetAutoLayout(true) has been called on it!)
+    m_pPane->Layout();
+}
+
+#endif      //  __WXGTK24__
+
-- 
2.50.0

