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cw pro adaption (illegal default argument error was given)
[wxWidgets.git] / samples / treectrl / treetest.cpp
diff --git a/samples/treectrl/treetest.cpp b/samples/treectrl/treetest.cpp
index 0eb7d8894645c4cb1be4641f105cfd8026953c03..3868180f3d6a760c00e9819d22888b18673b31af 100644 (file)
--- a/samples/treectrl/treetest.cpp
+++ b/samples/treectrl/treetest.cpp
@@ -6,382 +6,437 @@
 // Created:     04/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Julian Smart and Markus Holzem
 // Created:     04/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Julian Smart and Markus Holzem
-// Licence:    wxWindows license
+// Licence:     wxWindows license
 /////////////////////////////////////////////////////////////////////////////
 
 #ifdef __GNUG__
 /////////////////////////////////////////////////////////////////////////////
 
 #ifdef __GNUG__
-#pragma implementation
-#pragma interface
+  #pragma implementation
+  #pragma interface
 #endif
 
 // For compilers that support precompilation, includes "wx/wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
 #endif
 
 // For compilers that support precompilation, includes "wx/wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
-#pragma hdrstop
+  #pragma hdrstop
 #endif
 
 #ifndef WX_PRECOMP
 #endif
 
 #ifndef WX_PRECOMP
-#include "wx/wx.h"
+  #include "wx/wx.h"
 #endif
 
 #endif
 
-#ifdef __WXGTK__
-#include "mondrian.xpm"
+// under Windows the icons are in the .rc file
+#ifndef __WXMSW__
+  #include "icon1.xpm"
+  #include "icon2.xpm"
+  #include "mondrian.xpm"
 #endif
 
 #endif
 
+#include "wx/log.h"
+
+#include "wx/imaglist.h"
 #include "wx/treectrl.h"
 
 #include "treetest.h"
 
 #include "wx/treectrl.h"
 
 #include "treetest.h"
 
+// verify that the item is ok and insult the user if it is not
+#define CHECK_ITEM( item ) if ( !item.IsOk() ) {                            \
+                             wxMessageBox("Please select some item first!", \
+                                          "Tree sample error",              \
+                                          wxOK | wxICON_EXCLAMATION,        \
+                                          this);                            \
+                             return;                                        \
+                           }  
+                                          
 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
-       EVT_MENU(TREE_QUIT, MyFrame::OnQuit)
-       EVT_MENU(TREE_ABOUT, MyFrame::OnAbout)
+  EVT_MENU(TreeTest_Quit, MyFrame::OnQuit)
+  EVT_MENU(TreeTest_About, MyFrame::OnAbout)
+  EVT_MENU(TreeTest_Dump, MyFrame::OnDump)
+  EVT_MENU(TreeTest_Rename, MyFrame::OnRename)
+  EVT_MENU(TreeTest_Sort, MyFrame::OnSort)
+  EVT_MENU(TreeTest_SortRev, MyFrame::OnSortRev)
+  EVT_MENU(TreeTest_Bold, MyFrame::OnSetBold)
+  EVT_MENU(TreeTest_UnBold, MyFrame::OnClearBold)
+  EVT_MENU(TreeTest_Delete, MyFrame::OnDelete)
+  EVT_MENU(TreeTest_DeleteChildren, MyFrame::OnDeleteChildren)
+  EVT_MENU(TreeTest_DeleteAll, MyFrame::OnDeleteAll)
+  EVT_MENU(TreeTest_Recreate, MyFrame::OnRecreate)
 END_EVENT_TABLE()
 
 BEGIN_EVENT_TABLE(MyTreeCtrl, wxTreeCtrl)
 END_EVENT_TABLE()
 
 BEGIN_EVENT_TABLE(MyTreeCtrl, wxTreeCtrl)
-       EVT_TREE_BEGIN_DRAG(TREE_CTRL, MyTreeCtrl::OnBeginDrag)
-       EVT_TREE_BEGIN_RDRAG(TREE_CTRL, MyTreeCtrl::OnBeginRDrag)
-       EVT_TREE_BEGIN_LABEL_EDIT(TREE_CTRL, MyTreeCtrl::OnBeginLabelEdit)
-       EVT_TREE_END_LABEL_EDIT(TREE_CTRL, MyTreeCtrl::OnEndLabelEdit)
-       EVT_TREE_DELETE_ITEM(TREE_CTRL, MyTreeCtrl::OnDeleteItem)
-       EVT_TREE_GET_INFO(TREE_CTRL, MyTreeCtrl::OnGetInfo)
-       EVT_TREE_SET_INFO(TREE_CTRL, MyTreeCtrl::OnSetInfo)
-       EVT_TREE_ITEM_EXPANDED(TREE_CTRL, MyTreeCtrl::OnItemExpanded)
-       EVT_TREE_ITEM_EXPANDING(TREE_CTRL, MyTreeCtrl::OnItemExpanding)
-       EVT_TREE_SEL_CHANGED(TREE_CTRL, MyTreeCtrl::OnSelChanged)
-       EVT_TREE_SEL_CHANGING(TREE_CTRL, MyTreeCtrl::OnSelChanging)
-       EVT_TREE_KEY_DOWN(TREE_CTRL, MyTreeCtrl::OnKeyDown)
+  EVT_TREE_BEGIN_DRAG(TreeTest_Ctrl, MyTreeCtrl::OnBeginDrag)
+  EVT_TREE_BEGIN_RDRAG(TreeTest_Ctrl, MyTreeCtrl::OnBeginRDrag)
+  EVT_TREE_BEGIN_LABEL_EDIT(TreeTest_Ctrl, MyTreeCtrl::OnBeginLabelEdit)
+  EVT_TREE_END_LABEL_EDIT(TreeTest_Ctrl, MyTreeCtrl::OnEndLabelEdit)
+  EVT_TREE_DELETE_ITEM(TreeTest_Ctrl, MyTreeCtrl::OnDeleteItem)
+  EVT_TREE_GET_INFO(TreeTest_Ctrl, MyTreeCtrl::OnGetInfo)
+  EVT_TREE_SET_INFO(TreeTest_Ctrl, MyTreeCtrl::OnSetInfo)
+  EVT_TREE_ITEM_EXPANDED(TreeTest_Ctrl, MyTreeCtrl::OnItemExpanded)
+  EVT_TREE_ITEM_EXPANDING(TreeTest_Ctrl, MyTreeCtrl::OnItemExpanding)
+  EVT_TREE_ITEM_COLLAPSED(TreeTest_Ctrl, MyTreeCtrl::OnItemCollapsed)
+  EVT_TREE_ITEM_COLLAPSING(TreeTest_Ctrl, MyTreeCtrl::OnItemCollapsing)
+  EVT_TREE_SEL_CHANGED(TreeTest_Ctrl, MyTreeCtrl::OnSelChanged)
+  EVT_TREE_SEL_CHANGING(TreeTest_Ctrl, MyTreeCtrl::OnSelChanging)
+  EVT_TREE_KEY_DOWN(TreeTest_Ctrl, MyTreeCtrl::OnTreeKeyDown)
+  EVT_TREE_ITEM_ACTIVATED(TreeTest_Ctrl, MyTreeCtrl::OnItemActivated)
 END_EVENT_TABLE()
 
 IMPLEMENT_APP(MyApp)
 
 END_EVENT_TABLE()
 
 IMPLEMENT_APP(MyApp)
 
-// `Main program' equivalent, creating windows and returning main app frame
-bool MyApp::OnInit(void)
+bool MyApp::OnInit()
 {
   // Create the main frame window
 {
   // Create the main frame window
-  MyFrame *frame = new MyFrame(NULL, "wxTreeCtrl Test", 50, 50, 450, 340);
+  MyFrame *frame = new MyFrame("wxTreeCtrl Test", 50, 50, 450, 340);
 
 
-  // This reduces flicker effects - even better would be to define OnEraseBackground
-  // to do nothing. When the tree control's scrollbars are show or hidden, the
-  // frame is sent a background erase event.
-  frame->SetBackgroundColour(wxColour(255, 255, 255));
+  // Show the frame
+  frame->Show(TRUE);
+  SetTopWindow(frame);
 
 
-  // Give it an icon
-#ifdef __WXMSW__
-  frame->SetIcon(wxIcon("mondrian"));
-#else
-  frame->SetIcon(wxIcon(mondrian_xpm));
-#endif
+  return TRUE;
+}
 
 
-  // Make an image list containing small icons
-  m_imageListNormal = new wxImageList(16, 16, TRUE);
 
 
-#ifdef __WXMSW__
-  wxIcon icon1("icon1", wxBITMAP_TYPE_ICO_RESOURCE);
-  m_imageListNormal->Add(icon1);
-  wxIcon icon2("icon2", wxBITMAP_TYPE_ICO_RESOURCE);
-  m_imageListNormal->Add(icon2);
-#else
-#endif
+// My frame constructor
+MyFrame::MyFrame(const wxString& title, int x, int y, int w, int h)
+       : wxFrame((wxFrame *)NULL, -1, title, wxPoint(x, y), wxSize(w, h))
+{
+  // This reduces flicker effects - even better would be to define
+  // OnEraseBackground to do nothing. When the tree control's scrollbars are
+  // show or hidden, the frame is sent a background erase event.
+  SetBackgroundColour(wxColour(255, 255, 255));
+
+  // Give it an icon
+  SetIcon(wxICON(mondrian));
 
   // Make a menubar
 
   // Make a menubar
-  wxMenu *file_menu = new wxMenu;
+  wxMenu *file_menu = new wxMenu,
+         *tree_menu = new wxMenu;
+
+  file_menu->Append(TreeTest_About, "&About...");
+  file_menu->AppendSeparator();
+  file_menu->Append(TreeTest_Quit, "E&xit");
+
+  tree_menu->Append(TreeTest_Dump, "D&ump tree items");
+  tree_menu->Append(TreeTest_Recreate, "&Recreate the tree");
+  tree_menu->AppendSeparator();
+  tree_menu->Append(TreeTest_Delete, "&Delete this item");
+  tree_menu->Append(TreeTest_DeleteChildren, "Delete &children");
+  tree_menu->Append(TreeTest_DeleteAll, "Delete &all items");
+  tree_menu->AppendSeparator();
+  tree_menu->Append(TreeTest_Sort, "Sort children of current item");
+  tree_menu->Append(TreeTest_SortRev, "Sort in reversed order");
+  tree_menu->Append(TreeTest_Rename, "Rename item...");
+  tree_menu->AppendSeparator();
+  tree_menu->Append(TreeTest_Bold, "Make item &bold");
+  tree_menu->Append(TreeTest_UnBold, "Make item &not bold");
 
 
-  file_menu->Append(TREE_ABOUT, "&About");
-  file_menu->Append(TREE_QUIT, "E&xit");
   wxMenuBar *menu_bar = new wxMenuBar;
   menu_bar->Append(file_menu, "&File");
   wxMenuBar *menu_bar = new wxMenuBar;
   menu_bar->Append(file_menu, "&File");
-  frame->SetMenuBar(menu_bar);
+  menu_bar->Append(tree_menu, "&Tree");
+  SetMenuBar(menu_bar);
 
   // Make a panel with a message
 
   // Make a panel with a message
-  frame->m_treeCtrl = new MyTreeCtrl(frame, TREE_CTRL, wxPoint(0, 0), wxSize(400, 200),
-       wxTR_HAS_BUTTONS|wxSUNKEN_BORDER);
-  frame->m_logWindow = new wxTextCtrl(frame, -1, "", wxPoint(0, 0), wxSize(400, 200),
-       wxTE_MULTILINE|wxSUNKEN_BORDER);
+  m_treeCtrl = new MyTreeCtrl(this, TreeTest_Ctrl,
+                              wxDefaultPosition, wxDefaultSize,
+                              wxTR_HAS_BUTTONS | wxSUNKEN_BORDER);
+  wxTextCtrl *textCtrl = new wxTextCtrl(this, -1, "",
+                                        wxDefaultPosition, wxDefaultSize,
+                                        wxTE_MULTILINE | wxSUNKEN_BORDER);
 
   wxLayoutConstraints *c = new wxLayoutConstraints;
 
   wxLayoutConstraints *c = new wxLayoutConstraints;
-  c->top.SameAs                        (frame, wxTop);
-  c->left.SameAs               (frame, wxLeft);
-  c->right.SameAs              (frame, wxRight);
-  c->height.PercentOf  (frame, wxHeight, 66);
-  frame->m_treeCtrl->SetConstraints(c);
+  c->top.SameAs(this, wxTop);
+  c->left.SameAs(this, wxLeft);
+  c->right.SameAs(this, wxRight);
+  c->height.PercentOf(this, wxHeight, 66);
+  m_treeCtrl->SetConstraints(c);
 
   c = new wxLayoutConstraints;
 
   c = new wxLayoutConstraints;
-  c->top.Below                 (frame->m_treeCtrl);
-  c->left.SameAs               (frame, wxLeft);
-  c->right.SameAs              (frame, wxRight);
-  c->bottom.SameAs             (frame, wxBottom);
-  frame->m_logWindow->SetConstraints(c);
-  frame->SetAutoLayout(TRUE);
-
-  frame->m_treeCtrl->SetImageList(wxGetApp().m_imageListNormal, wxIMAGE_LIST_NORMAL);
-
-  long rootId = frame->m_treeCtrl->InsertItem(0, "Root", 0);
-
-  char buf[20];
-  int i;
-  wxString str;
-
-  for ( i = 0; i < 10; i++)
-  {
-       sprintf(buf, "Folder child %d", i);
-    str = buf;
-    long id = frame->m_treeCtrl->InsertItem(rootId, str, 0);
-       int j;
-    for ( j = 0; j < 5; j++)
-    {
-         sprintf(buf, "File child %d", j);
-      str = buf;
-      frame->m_treeCtrl->InsertItem(id, str, 1);
-    }
-  }
-  for ( i = 0; i < 10; i++)
-  {
-       sprintf(buf, "File child %d", i);
-    str = buf;
-    frame->m_treeCtrl->InsertItem(rootId, str, 1);
-  }
-
-  frame->CreateStatusBar(3);
-  frame->SetStatusText("", 0);
-
-  // Show the frame
-  frame->Show(TRUE);
-  
-  SetTopWindow(frame);
-
-  return TRUE;
+  c->top.Below(m_treeCtrl);
+  c->left.SameAs(this, wxLeft);
+  c->right.SameAs(this, wxRight);
+  c->bottom.SameAs(this, wxBottom);
+  textCtrl->SetConstraints(c);
+  SetAutoLayout(TRUE);
+
+  // create a status bar with 3 panes
+  CreateStatusBar(3);
+  SetStatusText("", 0);
+
+#ifdef __WXMOTIF__
+  // For some reason, we get a memcpy crash in wxLogStream::DoLogStream
+  // on gcc/wxMotif, if we use wxLogTextCtl. Maybe it's just gcc?
+  delete wxLog::SetActiveTarget(new wxLogStderr);
+#else
+  // set our text control as the log target
+  wxLogTextCtrl *logWindow = new wxLogTextCtrl(textCtrl);
+  delete wxLog::SetActiveTarget(logWindow);
+#endif
 }
 
 }
 
-// My frame constructor
-MyFrame::MyFrame(wxFrame *frame, char *title, int x, int y, int w, int h):
-  wxFrame(frame, -1, title, wxPoint(x, y), wxSize(w, h))
+MyFrame::~MyFrame()
 {
 {
-       m_treeCtrl = NULL;
-       m_logWindow = NULL;
+  delete wxLog::SetActiveTarget(NULL);
 }
 
 }
 
-MyFrame::~MyFrame(void)
+void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 {
 {
-       delete wxGetApp().m_imageListNormal;
+  Close(TRUE);
 }
 
 }
 
-void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event) )
+void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 {
 {
-  Close(TRUE);
+  wxMessageBox("Tree test sample\n"
+               "Julian Smart (c) 1997,\n"
+               "Vadim Zeitlin (c) 1998",
+               "About tree test",
+               wxOK | wxICON_INFORMATION, this);
 }
 
 }
 
-void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event) )
+void MyFrame::OnRename(wxCommandEvent& WXUNUSED(event))
 {
 {
-  wxMessageDialog dialog(this, "Tree test sample\nJulian Smart (c) 1997",
-       "About tree test", wxOK|wxCANCEL);
+  wxTreeItemId item = m_treeCtrl->GetSelection();
 
 
-  dialog.ShowModal();
-}
+  CHECK_ITEM( item );
 
 
-// MyTreeCtrl
+  static wxString s_text;
+  s_text = wxGetTextFromUser("New name: ", "Tree sample question",
+                             s_text, this);
+  if ( !s_text.IsEmpty() )
+  {
+    m_treeCtrl->SetItemText(item, s_text);
+  }
+}
 
 
-void MyTreeCtrl::OnBeginDrag(wxTreeEvent& WXUNUSED(event) )
+void MyFrame::DoSort(bool reverse)
 {
 {
-       if ( !wxGetApp().GetTopWindow() )
-               return;
+  wxTreeItemId item = m_treeCtrl->GetSelection();
 
 
-       wxTextCtrl *text = ((MyFrame *)wxGetApp().GetTopWindow())->m_logWindow;
-       if ( !text )
-               return;
+  CHECK_ITEM( item );
 
 
-#ifndef __GNUWIN32__
-       ostream str(text);
-
-       str << "OnBeginDrag\n";
-       str.flush();
-#endif
+  m_treeCtrl->DoSortChildren(item, reverse);
 }
 
 }
 
-void MyTreeCtrl::OnBeginRDrag(wxTreeEvent& WXUNUSED(event) )
+void MyFrame::OnDump(wxCommandEvent& WXUNUSED(event))
 {
 {
-       if ( !wxGetApp().GetTopWindow() )
-               return;
-
-       wxTextCtrl *text = ((MyFrame *)wxGetApp().GetTopWindow())->m_logWindow;
-       if ( !text )
-               return;
+  wxTreeItemId root = m_treeCtrl->GetSelection();
 
 
-#ifndef __GNUWIN32__
-       ostream str(text);
+  CHECK_ITEM( root );
 
 
-       str << "OnBeginRDrag\n";
-       str.flush();
-#endif
+  m_treeCtrl->GetItemsRecursively(root, -1);
 }
 
 }
 
-void MyTreeCtrl::OnBeginLabelEdit(wxTreeEvent& WXUNUSED(event) )
+void MyFrame::DoSetBold(bool bold)
 {
 {
-       if ( !wxGetApp().GetTopWindow() )
-               return;
-
-       wxTextCtrl *text = ((MyFrame *)wxGetApp().GetTopWindow())->m_logWindow;
-       if ( !text )
-               return;
+  wxTreeItemId item = m_treeCtrl->GetSelection();
 
 
-#ifndef __GNUWIN32__
-       ostream str(text);
+  CHECK_ITEM( item );
 
 
-       str << "OnBeginLabelEdit\n";
-       str.flush();
-#endif
+  m_treeCtrl->SetItemBold(item, bold);
 }
 
 }
 
-void MyTreeCtrl::OnEndLabelEdit(wxTreeEvent& WXUNUSED(event) )
+void MyFrame::OnDelete(wxCommandEvent& WXUNUSED(event))
 {
 {
-       if ( !wxGetApp().GetTopWindow() )
-               return;
+  wxTreeItemId item = m_treeCtrl->GetSelection();
 
 
-       wxTextCtrl *text = ((MyFrame *)wxGetApp().GetTopWindow())->m_logWindow;
-       if ( !text )
-               return;
+  CHECK_ITEM( item );
 
 
-#ifndef __GNUWIN32__
-       ostream str(text);
-
-       str << "OnEndLabelEdit\n";
-       str.flush();
-#endif
+  m_treeCtrl->Delete(item);
 }
 
 }
 
-void MyTreeCtrl::OnDeleteItem(wxTreeEvent& WXUNUSED(event) )
+void MyFrame::OnDeleteChildren(wxCommandEvent& WXUNUSED(event))
 {
 {
-       if ( !wxGetApp().GetTopWindow() )
-               return;
+  wxTreeItemId item = m_treeCtrl->GetSelection();
 
 
-       wxTextCtrl *text = ((MyFrame *)wxGetApp().GetTopWindow())->m_logWindow;
-       if ( !text )
-               return;
+  CHECK_ITEM( item );
 
 
-#ifndef __GNUWIN32__
-       ostream str(text);
+  m_treeCtrl->DeleteChildren(item);
+}
 
 
-       str << "OnDeleteItem\n";
-       str.flush();
-#endif
+void MyFrame::OnDeleteAll(wxCommandEvent& WXUNUSED(event))
+{
+  m_treeCtrl->DeleteAllItems();
 }
 
 }
 
-void MyTreeCtrl::OnGetInfo(wxTreeEvent& WXUNUSED(event) )
+void MyFrame::OnRecreate(wxCommandEvent& event)
 {
 {
-       if ( !wxGetApp().GetTopWindow() )
-               return;
+  OnDeleteAll(event);
+  m_treeCtrl->AddTestItemsToTree(3, 2);
+}
 
 
-       wxTextCtrl *text = ((MyFrame *)wxGetApp().GetTopWindow())->m_logWindow;
-       if ( !text )
-               return;
+// MyTreeCtrl implementation
+IMPLEMENT_DYNAMIC_CLASS(MyTreeCtrl, wxTreeCtrl)
 
 
-#ifndef __GNUWIN32__
-       ostream str(text);
+MyTreeCtrl::MyTreeCtrl(wxWindow *parent, const wxWindowID id,
+                       const wxPoint& pos, const wxSize& size,
+                       long style)
+          : wxTreeCtrl(parent, id, pos, size, style)
+{
+  m_reverseSort = FALSE;
 
 
-       str << "OnGetInfo\n";
-       str.flush();
-#endif
-}
+  // Make an image list containing small icons
+  m_imageListNormal = new wxImageList(16, 16, TRUE);
 
 
-void MyTreeCtrl::OnSetInfo(wxTreeEvent& WXUNUSED(event) )
-{
-       if ( !wxGetApp().GetTopWindow() )
-               return;
+  // should correspond to TreeCtrlIcon_xxx enum
+#if defined(__WXMSW__) && defined(__WIN16__)
+  // This is required in 16-bit Windows mode only because we can't load a specific (16x16)
+  // icon image, so it comes out stretched
+  m_imageListNormal->Add(wxBitmap("bitmap1", wxBITMAP_TYPE_BMP_RESOURCE));
+  m_imageListNormal->Add(wxBitmap("bitmap2", wxBITMAP_TYPE_BMP_RESOURCE));
+#else
+  m_imageListNormal->Add(wxICON(icon1));
+  m_imageListNormal->Add(wxICON(icon2));
+#endif
 
 
-       wxTextCtrl *text = ((MyFrame *)wxGetApp().GetTopWindow())->m_logWindow;
-       if ( !text )
-               return;
+  SetImageList(m_imageListNormal);
 
 
-#ifndef __GNUWIN32__
-       ostream str(text);
+  // Add some items to the tree
+  AddTestItemsToTree(3, 2);
+}
 
 
-       str << "OnSetInfo\n";
-       str.flush();
-#endif
+MyTreeCtrl::~MyTreeCtrl()
+{
+  delete m_imageListNormal;
 }
 
 }
 
-void MyTreeCtrl::OnItemExpanded(wxTreeEvent& WXUNUSED(event) )
+int MyTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
+                               const wxTreeItemId& item2)
 {
 {
-       if ( !wxGetApp().GetTopWindow() )
-               return;
+  if ( m_reverseSort )
+  {
+    // just exchange 1st and 2nd items
+    return wxTreeCtrl::OnCompareItems(item2, item1);
+  }
+  else
+  {
+    return wxTreeCtrl::OnCompareItems(item1, item2);
+  }
+}
 
 
-       wxTextCtrl *text = ((MyFrame *)wxGetApp().GetTopWindow())->m_logWindow;
-       if ( !text )
-               return;
+void MyTreeCtrl::AddItemsRecursively(const wxTreeItemId& idParent,
+                                     size_t numChildren,
+                                     size_t depth,
+                                     size_t folder)
+{
+  if ( depth > 0 )
+  {
+    wxString str;
+    for ( size_t n = 0; n < numChildren; n++ )
+    {
+      // at depth 1 elements won't have any more children
+      if (depth == 1)
+        str.Printf("%s child %d.%d", "File", folder, n + 1);
+      else
+        str.Printf("%s child %d","Folder", n + 1);
+
+      int image = depth == 1 ? TreeCtrlIcon_File : TreeCtrlIcon_Folder;
+      wxTreeItemId id = AppendItem(idParent, str, image, image,
+                                   new MyTreeItemData(str));
+      AddItemsRecursively(id, numChildren, depth - 1, n + 1);
+    }
+  }
+  //else: done!
+}
 
 
-#ifndef __GNUWIN32__
-       ostream str(text);
+void MyTreeCtrl::AddTestItemsToTree(size_t numChildren,
+                                    size_t depth)
+{
+  wxTreeItemId rootId = AddRoot("Root",
+                        TreeCtrlIcon_Folder, TreeCtrlIcon_Folder,
+                        new MyTreeItemData("Root item"));
 
 
-       str << "OnItemExpanded\n";
-       str.flush();
-#endif
+  AddItemsRecursively(rootId, numChildren, depth, 0);
 }
 
 }
 
-void MyTreeCtrl::OnItemExpanding(wxTreeEvent& WXUNUSED(event) )
+void MyTreeCtrl::GetItemsRecursively(const wxTreeItemId& idParent, long cookie)
 {
 {
-       if ( !wxGetApp().GetTopWindow() )
-               return;
+  wxTreeItemId id;
 
 
-       wxTextCtrl *text = ((MyFrame *)wxGetApp().GetTopWindow())->m_logWindow;
-       if ( !text )
-               return;
+  if( cookie == -1 )
+    id = GetFirstChild(idParent, cookie);
+  else
+    id = GetNextChild(idParent, cookie);
 
 
-#ifndef __GNUWIN32__
-       ostream str(text);
+  if(id <= 0)
+    return;
 
 
-       str << "OnItemExpanding\n";
-       str.flush();
-#endif
-}
+  wxString text=GetItemText(id);
+  wxLogMessage(text);
 
 
-void MyTreeCtrl::OnSelChanged(wxTreeEvent& WXUNUSED(event) )
-{
-       if ( !wxGetApp().GetTopWindow() )
-               return;
+  if (ItemHasChildren(id))
+    GetItemsRecursively(id,-1);
 
 
-       wxTextCtrl *text = ((MyFrame *)wxGetApp().GetTopWindow())->m_logWindow;
-       if ( !text )
-               return;
+  GetItemsRecursively(idParent, cookie);
+}
 
 
-#ifndef __GNUWIN32__
-       ostream str(text);
 
 
-       str << "OnSelChanged\n";
-       str.flush();
-#endif
-}
+// avoid repetition
+#define TREE_EVENT_HANDLER(name)                                \
+    void MyTreeCtrl::name(wxTreeEvent& WXUNUSED(event))         \
+    {                                                           \
+      wxLogMessage(#name);                                      \
+    }
 
 
-void MyTreeCtrl::OnSelChanging(wxTreeEvent& WXUNUSED(event) )
+TREE_EVENT_HANDLER(OnBeginDrag)
+TREE_EVENT_HANDLER(OnBeginRDrag)
+TREE_EVENT_HANDLER(OnBeginLabelEdit)
+TREE_EVENT_HANDLER(OnEndLabelEdit)
+TREE_EVENT_HANDLER(OnDeleteItem)
+TREE_EVENT_HANDLER(OnGetInfo)
+TREE_EVENT_HANDLER(OnSetInfo)
+TREE_EVENT_HANDLER(OnItemExpanded)
+TREE_EVENT_HANDLER(OnItemExpanding)
+TREE_EVENT_HANDLER(OnItemCollapsed)
+TREE_EVENT_HANDLER(OnSelChanged)
+TREE_EVENT_HANDLER(OnSelChanging)
+
+#undef TREE_EVENT_HANDLER
+
+void MyTreeCtrl::OnItemCollapsing(wxTreeEvent& event)
 {
 {
-       if ( !wxGetApp().GetTopWindow() )
-               return;
+  wxLogMessage("OnItemCollapsing");
 
 
-       wxTextCtrl *text = ((MyFrame *)wxGetApp().GetTopWindow())->m_logWindow;
-       if ( !text )
-               return;
+  // for testing, prevent the user from collapsing the root item
+  wxTreeItemId itemId = event.GetItem();
+  if ( !GetParent(itemId).IsOk() )
+  {
+    wxMessageBox("You can't collapse the root item.");
 
 
-#ifndef __GNUWIN32__
-       ostream str(text);
+    event.Veto();
+  }
+}
 
 
-       str << "OnSelChanging\n";
-       str.flush();
-#endif
+void MyTreeCtrl::OnTreeKeyDown(wxTreeEvent&WXUNUSED(event))
+{
+  wxLogMessage("OnTreeKeyDown");
 }
 
 }
 
-void MyTreeCtrl::OnKeyDown(wxTreeEvent& WXUNUSED(event) )
+void MyTreeCtrl::OnItemActivated(wxTreeEvent&WXUNUSED(event))
 {
 {
-       if ( !wxGetApp().GetTopWindow() )
-               return;
+  // show some info about this item
+  wxTreeItemId itemId = GetSelection();
+  MyTreeItemData *item = (MyTreeItemData *)GetItemData(itemId);
 
 
-       wxTextCtrl *text = ((MyFrame *)wxGetApp().GetTopWindow())->m_logWindow;
-       if ( !text )
-               return;
+  if ( item != NULL )
+  {
+    item->ShowInfo(this);
+  }
 
 
-#ifndef __GNUWIN32__
-       ostream str(text);
+  wxLogMessage("OnItemActivated");
+}
 
 
-       str << "OnKeyDown\n";
-       str.flush();
-#endif
+static inline const char *Bool2String(bool b)
+{
+  return b ? "" : "not ";
 }
 
 }
 
+void MyTreeItemData::ShowInfo(wxTreeCtrl *tree)
+{
+  wxLogMessage("Item '%s': %sselected, %sexpanded, %sbold,\n"
+               "%u children (%u immediately under this item).",
+               m_desc.c_str(),
+               Bool2String(tree->IsSelected(GetId())),
+               Bool2String(tree->IsExpanded(GetId())),
+               Bool2String(tree->IsBold(GetId())),
+               tree->GetChildrenCount(GetId()),
+               tree->GetChildrenCount(GetId(), FALSE));
+}
wxWidgets (Impactor)