Baked files with Bakefile 0.1.1 using Python 2.3

[wxWidgets.git] / demos / life / life.cpp

diff --git a/demos/life/life.cpp b/demos/life/life.cpp
index 44bca3027ec8752ff13a55c7a42b335b469711a9..cd6c32d693acf63da18097be1a6477b7d406e805 100644 (file)
--- a/demos/life/life.cpp
+++ b/demos/life/life.cpp
@@ -29,25 +29,30 @@
 #endif
 
 #include "wx/statline.h"
 #endif
 
 #include "wx/statline.h"

+#include "wx/wfstream.h"
+#include "wx/filedlg.h"

 
 #include "life.h"
 #include "game.h"
 #include "dialogs.h"
 
 #include "life.h"
 #include "game.h"
 #include "dialogs.h"

+#include "reader.h"

 
 // --------------------------------------------------------------------------
 // resources
 // --------------------------------------------------------------------------
 
 
 // --------------------------------------------------------------------------
 // resources
 // --------------------------------------------------------------------------
 

-#if defined(__WXGTK__) || defined(__WXMOTIF__)
+#if defined(__WXGTK__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__) || defined(__WXX11__)

     // application icon
     #include "mondrian.xpm"
 
     // bitmap buttons for the toolbar
     #include "bitmaps/reset.xpm"
     // application icon
     #include "mondrian.xpm"
 
     // bitmap buttons for the toolbar
     #include "bitmaps/reset.xpm"

+    #include "bitmaps/open.xpm"

     #include "bitmaps/play.xpm"
     #include "bitmaps/stop.xpm"
     #include "bitmaps/zoomin.xpm"
     #include "bitmaps/zoomout.xpm"
     #include "bitmaps/play.xpm"
     #include "bitmaps/stop.xpm"
     #include "bitmaps/zoomin.xpm"
     #include "bitmaps/zoomout.xpm"

+    #include "bitmaps/info.xpm"

 
     // navigator
     #include "bitmaps/north.xpm"
 
     // navigator
     #include "bitmaps/north.xpm"


@@ -61,28 +66,17 @@
 // constants
 // --------------------------------------------------------------------------
 
 // constants
 // --------------------------------------------------------------------------
 

-// IDs for the controls and the menu commands
+// IDs for the controls and the menu commands. Exluding those already defined
+// by wxWindows, such as wxID_NEW.

 enum
 {
     // timer
 enum
 {
     // timer

-    ID_TIMER = 1001,
+    ID_TIMER = wxID_HIGHEST,

 
 

-    // menu items and toolbar buttons
-    ID_RESET,
+    // file menu

     ID_SAMPLES,
     ID_SAMPLES,

-    ID_ABOUT,
-    ID_EXIT,
-    ID_START,
-    ID_STEP,
-    ID_STOP,
-    ID_ZOOMIN,
-    ID_ZOOMOUT,
-    ID_TOPSPEED,

 
 

-    // speed selection slider
-    ID_SLIDER,
-
-    // navigation
+    // view menu

     ID_SHOWNAV,
     ID_ORIGIN,
     ID_CENTER,
     ID_SHOWNAV,
     ID_ORIGIN,
     ID_CENTER,


@@ -90,6 +84,18 @@ enum
     ID_SOUTH,
     ID_EAST,
     ID_WEST,
     ID_SOUTH,
     ID_EAST,
     ID_WEST,

+    ID_ZOOMIN,
+    ID_ZOOMOUT,
+    ID_INFO,
+
+    // game menu
+    ID_START,
+    ID_STEP,
+    ID_STOP,
+    ID_TOPSPEED,
+
+    // speed selection slider
+    ID_SLIDER

 };
 
 // --------------------------------------------------------------------------
 };
 
 // --------------------------------------------------------------------------


@@ -98,14 +104,11 @@ enum
 
 // Event tables
 BEGIN_EVENT_TABLE(LifeFrame, wxFrame)
 
 // Event tables
 BEGIN_EVENT_TABLE(LifeFrame, wxFrame)

+    EVT_MENU            (wxID_NEW,      LifeFrame::OnMenu)
+    EVT_MENU            (wxID_OPEN,     LifeFrame::OnOpen)

     EVT_MENU            (ID_SAMPLES,  LifeFrame::OnSamples)
     EVT_MENU            (ID_SAMPLES,  LifeFrame::OnSamples)

-    EVT_MENU            (ID_RESET,    LifeFrame::OnMenu)
-    EVT_MENU            (ID_ABOUT,    LifeFrame::OnMenu)
-    EVT_MENU            (ID_EXIT,     LifeFrame::OnMenu)
-    EVT_MENU            (ID_START,    LifeFrame::OnMenu)
-    EVT_MENU            (ID_STEP,     LifeFrame::OnMenu)
-    EVT_MENU            (ID_STOP,     LifeFrame::OnMenu)
-    EVT_MENU            (ID_TOPSPEED, LifeFrame::OnMenu)
+    EVT_MENU            (wxID_ABOUT,    LifeFrame::OnMenu)
+    EVT_MENU            (wxID_EXIT,     LifeFrame::OnMenu)

     EVT_MENU            (ID_SHOWNAV,  LifeFrame::OnMenu)
     EVT_MENU            (ID_ORIGIN,   LifeFrame::OnNavigate)
     EVT_BUTTON          (ID_CENTER,   LifeFrame::OnNavigate)
     EVT_MENU            (ID_SHOWNAV,  LifeFrame::OnMenu)
     EVT_MENU            (ID_ORIGIN,   LifeFrame::OnNavigate)
     EVT_BUTTON          (ID_CENTER,   LifeFrame::OnNavigate)


@@ -115,6 +118,11 @@ BEGIN_EVENT_TABLE(LifeFrame, wxFrame)
     EVT_BUTTON          (ID_WEST,     LifeFrame::OnNavigate)
     EVT_MENU            (ID_ZOOMIN,   LifeFrame::OnZoom)
     EVT_MENU            (ID_ZOOMOUT,  LifeFrame::OnZoom)
     EVT_BUTTON          (ID_WEST,     LifeFrame::OnNavigate)
     EVT_MENU            (ID_ZOOMIN,   LifeFrame::OnZoom)
     EVT_MENU            (ID_ZOOMOUT,  LifeFrame::OnZoom)

+    EVT_MENU            (ID_INFO,     LifeFrame::OnMenu)
+    EVT_MENU            (ID_START,    LifeFrame::OnMenu)
+    EVT_MENU            (ID_STEP,     LifeFrame::OnMenu)
+    EVT_MENU            (ID_STOP,     LifeFrame::OnMenu)
+    EVT_MENU            (ID_TOPSPEED, LifeFrame::OnMenu)

     EVT_COMMAND_SCROLL  (ID_SLIDER,   LifeFrame::OnSlider)
     EVT_TIMER           (ID_TIMER,    LifeFrame::OnTimer)
     EVT_CLOSE           (             LifeFrame::OnClose)
     EVT_COMMAND_SCROLL  (ID_SLIDER,   LifeFrame::OnSlider)
     EVT_TIMER           (ID_TIMER,    LifeFrame::OnTimer)
     EVT_CLOSE           (             LifeFrame::OnClose)


@@ -128,7 +136,10 @@ BEGIN_EVENT_TABLE(LifeCanvas, wxWindow)
     EVT_PAINT           (             LifeCanvas::OnPaint)
     EVT_SCROLLWIN       (             LifeCanvas::OnScroll)
     EVT_SIZE            (             LifeCanvas::OnSize)
     EVT_PAINT           (             LifeCanvas::OnPaint)
     EVT_SCROLLWIN       (             LifeCanvas::OnScroll)
     EVT_SIZE            (             LifeCanvas::OnSize)

-    EVT_MOUSE_EVENTS    (             LifeCanvas::OnMouse)
+    EVT_MOTION          (             LifeCanvas::OnMouse)
+    EVT_LEFT_DOWN       (             LifeCanvas::OnMouse)
+    EVT_LEFT_UP         (             LifeCanvas::OnMouse)
+    EVT_LEFT_DCLICK     (             LifeCanvas::OnMouse)

     EVT_ERASE_BACKGROUND(             LifeCanvas::OnEraseBackground)
 END_EVENT_TABLE()
 
     EVT_ERASE_BACKGROUND(             LifeCanvas::OnEraseBackground)
 END_EVENT_TABLE()
 


@@ -142,8 +153,8 @@ IMPLEMENT_APP(LifeApp)
 // ==========================================================================
 
 // some shortcuts
 // ==========================================================================
 
 // some shortcuts

-#define ADD_TOOL(id, bmp, tooltip, help)     \
-    toolBar->AddTool(id, bmp, wxNullBitmap, FALSE, -1, -1, (wxObject *)0, tooltip, help)
+#define ADD_TOOL(id, bmp, tooltip, help) \
+    toolBar->AddTool(id, bmp, wxNullBitmap, false, -1, -1, (wxObject *)0, tooltip, help)

 
 
 // --------------------------------------------------------------------------
 
 
 // --------------------------------------------------------------------------


@@ -157,11 +168,16 @@ bool LifeApp::OnInit()
     LifeFrame *frame = new LifeFrame();
 
     // show it and tell the application that it's our main window
     LifeFrame *frame = new LifeFrame();
 
     // show it and tell the application that it's our main window

-    frame->Show(TRUE);
+    frame->Show(true);

     SetTopWindow(frame);
 
     SetTopWindow(frame);
 

+    // just for Motif
+#ifdef __WXMOTIF__
+    frame->UpdateInfoText();
+#endif
+

     // enter the main message loop and run the app
     // enter the main message loop and run the app

-    return TRUE;
+    return true;

 }
 
 // --------------------------------------------------------------------------
 }
 
 // --------------------------------------------------------------------------


@@ -169,69 +185,81 @@ bool LifeApp::OnInit()
 // --------------------------------------------------------------------------
 
 // frame constructor
 // --------------------------------------------------------------------------
 
 // frame constructor

-LifeFrame::LifeFrame() : wxFrame((wxFrame *)0, -1, _("Life!"), wxPoint(200, 200))
+LifeFrame::LifeFrame() : wxFrame( (wxFrame *) NULL, wxID_ANY,
+    _("Life!"), wxPoint(200, 200) )

 {
     // frame icon
     SetIcon(wxICON(mondrian));
 
     // menu bar
 {
     // frame icon
     SetIcon(wxICON(mondrian));
 
     // menu bar

-    wxMenu *menuFile = new wxMenu("", wxMENU_TEAROFF);
-    wxMenu *menuView = new wxMenu("", wxMENU_TEAROFF);
-    wxMenu *menuGame = new wxMenu("", wxMENU_TEAROFF);
-
-    menuFile->Append(ID_RESET, _("Reset"), _("Start a new game"));
-    menuFile->Append(ID_SAMPLES, _("Sample game..."), _("Select a sample configuration"));
-    menuFile->AppendSeparator();
-    menuFile->Append(ID_ABOUT, _("&About...\tCtrl-A"), _("Show about dialog"));
+    wxMenu *menuFile = new wxMenu(wxMENU_TEAROFF);
+    wxMenu *menuView = new wxMenu(wxMENU_TEAROFF);
+    wxMenu *menuGame = new wxMenu(wxMENU_TEAROFF);
+    wxMenu *menuHelp = new wxMenu(wxMENU_TEAROFF);
+
+    menuFile->Append(wxID_NEW, _("&New"), _("Start a new game"));
+    menuFile->Append(wxID_OPEN, _("&Open..."), _("Open an existing Life pattern"));
+    menuFile->Append(ID_SAMPLES, _("&Sample game..."), _("Select a sample configuration"));

     menuFile->AppendSeparator();
     menuFile->AppendSeparator();

-    menuFile->Append(ID_EXIT, _("E&xit\tAlt-X"), _("Quit this program"));
+    menuFile->Append(wxID_EXIT, _("E&xit\tAlt-X"), _("Quit this program"));

 
 

-    menuView->Append(ID_SHOWNAV, _("Navigation toolbox"), _("Show or hide toolbox"), TRUE);
-    menuView->Check (ID_SHOWNAV, TRUE);
+    menuView->Append(ID_SHOWNAV, _("Navigation &toolbox"), _("Show or hide toolbox"), wxITEM_CHECK);
+    menuView->Check(ID_SHOWNAV, true);

     menuView->AppendSeparator();
     menuView->AppendSeparator();

-    menuView->Append(ID_ORIGIN, _("Absolute origin"), _("Go to (0, 0)"));
-    menuView->Append(ID_CENTER, _("Center of mass"), _("Find center of mass"));
-    menuView->Append(ID_NORTH, _("North"), _("Find northernmost cell"));
-    menuView->Append(ID_SOUTH, _("South"), _("Find southernmost cell"));
-    menuView->Append(ID_EAST, _("East"), _("Find easternmost cell"));
-    menuView->Append(ID_WEST, _("West"), _("Find westernmost cell"));
+    menuView->Append(ID_ORIGIN, _("&Absolute origin"), _("Go to (0, 0)"));
+    menuView->Append(ID_CENTER, _("&Center of mass"), _("Find center of mass"));
+    menuView->Append(ID_NORTH, _("&North"), _("Find northernmost cell"));
+    menuView->Append(ID_SOUTH, _("&South"), _("Find southernmost cell"));
+    menuView->Append(ID_EAST, _("&East"), _("Find easternmost cell"));
+    menuView->Append(ID_WEST, _("&West"), _("Find westernmost cell"));

     menuView->AppendSeparator();
     menuView->AppendSeparator();

-    menuView->Append(ID_ZOOMIN, _("Zoom &in\tCtrl-I"));
-    menuView->Append(ID_ZOOMOUT, _("Zoom &out\tCtrl-O"));
+    menuView->Append(ID_ZOOMIN, _("Zoom &in\tCtrl-I"), _("Zoom in"));
+    menuView->Append(ID_ZOOMOUT, _("Zoom &out\tCtrl-O"), _("Zoom out"));
+    menuView->Append(ID_INFO, _("&Description\tCtrl-D"), _("View pattern description"));

 
     menuGame->Append(ID_START, _("&Start\tCtrl-S"), _("Start"));
     menuGame->Append(ID_STEP, _("&Next\tCtrl-N"), _("Single step"));
     menuGame->Append(ID_STOP, _("S&top\tCtrl-T"), _("Stop"));
 
     menuGame->Append(ID_START, _("&Start\tCtrl-S"), _("Start"));
     menuGame->Append(ID_STEP, _("&Next\tCtrl-N"), _("Single step"));
     menuGame->Append(ID_STOP, _("S&top\tCtrl-T"), _("Stop"));

-    menuGame->Enable(ID_STOP, FALSE);
+    menuGame->Enable(ID_STOP, false);

     menuGame->AppendSeparator();
     menuGame->AppendSeparator();

-    menuGame->Append(ID_TOPSPEED, _("Top speed!"), _("Go as fast as possible"));
+    menuGame->Append(ID_TOPSPEED, _("T&op speed!"), _("Go as fast as possible"));
+
+    menuHelp->Append(wxID_ABOUT, _("&About\tCtrl-A"), _("Show about dialog"));

 
     wxMenuBar *menuBar = new wxMenuBar();
     menuBar->Append(menuFile, _("&File"));
     menuBar->Append(menuView, _("&View"));
     menuBar->Append(menuGame, _("&Game"));
 
     wxMenuBar *menuBar = new wxMenuBar();
     menuBar->Append(menuFile, _("&File"));
     menuBar->Append(menuView, _("&View"));
     menuBar->Append(menuGame, _("&Game"));

+    menuBar->Append(menuHelp, _("&Help"));

     SetMenuBar(menuBar);
 
     // tool bar
     SetMenuBar(menuBar);
 
     // tool bar

-    wxBitmap tbBitmaps[5];
+    wxBitmap tbBitmaps[7];

 
     tbBitmaps[0] = wxBITMAP(reset);
 
     tbBitmaps[0] = wxBITMAP(reset);

-    tbBitmaps[1] = wxBITMAP(play);
-    tbBitmaps[2] = wxBITMAP(stop);
-    tbBitmaps[3] = wxBITMAP(zoomin);
-    tbBitmaps[4] = wxBITMAP(zoomout);
+    tbBitmaps[1] = wxBITMAP(open);
+    tbBitmaps[2] = wxBITMAP(zoomin);
+    tbBitmaps[3] = wxBITMAP(zoomout);
+    tbBitmaps[4] = wxBITMAP(info);
+    tbBitmaps[5] = wxBITMAP(play);
+    tbBitmaps[6] = wxBITMAP(stop);

 
     wxToolBar *toolBar = CreateToolBar();
     toolBar->SetMargins(5, 5);
     toolBar->SetToolBitmapSize(wxSize(16, 16));
 
     wxToolBar *toolBar = CreateToolBar();
     toolBar->SetMargins(5, 5);
     toolBar->SetToolBitmapSize(wxSize(16, 16));

-    ADD_TOOL(ID_RESET, tbBitmaps[0], _("Reset"), _("Start a new game"));
-    ADD_TOOL(ID_START, tbBitmaps[1], _("Start"), _("Start"));
-    ADD_TOOL(ID_STOP, tbBitmaps[2], _("Stop"), _("Stop"));
+
+    ADD_TOOL(wxID_NEW, tbBitmaps[0], _("New"), _("Start a new game"));
+    ADD_TOOL(wxID_OPEN, tbBitmaps[1], _("Open"), _("Open an existing Life pattern"));
+    toolBar->AddSeparator();
+    ADD_TOOL(ID_ZOOMIN, tbBitmaps[2], _("Zoom in"), _("Zoom in"));
+    ADD_TOOL(ID_ZOOMOUT, tbBitmaps[3], _("Zoom out"), _("Zoom out"));
+    ADD_TOOL(ID_INFO, tbBitmaps[4], _("Description"), _("Show description"));

     toolBar->AddSeparator();
     toolBar->AddSeparator();

-    ADD_TOOL(ID_ZOOMIN, tbBitmaps[3], _("Zoom in"), _("Zoom in"));
-    ADD_TOOL(ID_ZOOMOUT, tbBitmaps[4], _("Zoom out"), _("Zoom out"));
+    ADD_TOOL(ID_START, tbBitmaps[5], _("Start"), _("Start"));
+    ADD_TOOL(ID_STOP, tbBitmaps[6], _("Stop"), _("Stop"));
+

     toolBar->Realize();
     toolBar->Realize();

-    toolBar->EnableTool(ID_STOP, FALSE);    // must be after Realize() !
+    toolBar->EnableTool(ID_STOP, false);    // must be after Realize() !

 
     // status bar
     CreateStatusBar(2);
 
     // status bar
     CreateStatusBar(2);


@@ -240,8 +268,8 @@ LifeFrame::LifeFrame() : wxFrame((wxFrame *)0, -1, _("Life!"), wxPoint(200, 200)
     // game and timer
     m_life     = new Life();
     m_timer    = new wxTimer(this, ID_TIMER);
     // game and timer
     m_life     = new Life();
     m_timer    = new wxTimer(this, ID_TIMER);

-    m_running  = FALSE;
-    m_topspeed = FALSE;
+    m_running  = false;
+    m_topspeed = false;

     m_interval = 500;
     m_tics     = 0;
 
     m_interval = 500;
     m_tics     = 0;
 


@@ -250,14 +278,14 @@ LifeFrame::LifeFrame() : wxFrame((wxFrame *)0, -1, _("Life!"), wxPoint(200, 200)
     // and thus updating the text would result in a refresh of the canvas
     // if they belong to the same parent.
 
     // and thus updating the text would result in a refresh of the canvas
     // if they belong to the same parent.
 

-    wxPanel *panel1 = new wxPanel(this, -1);
-    wxPanel *panel2 = new wxPanel(this, -1);
+    wxPanel *panel1 = new wxPanel(this, wxID_ANY);
+    wxPanel *panel2 = new wxPanel(this, wxID_ANY);

 
     // canvas
     m_canvas = new LifeCanvas(panel1, m_life);
 
     // info panel
 
     // canvas
     m_canvas = new LifeCanvas(panel1, m_life);
 
     // info panel

-    m_text = new wxStaticText(panel2, -1,
+    m_text = new wxStaticText(panel2, wxID_ANY,

         wxEmptyString,
         wxDefaultPosition,
         wxDefaultSize,
         wxEmptyString,
         wxDefaultPosition,
         wxDefaultSize,


@@ -276,23 +304,21 @@ LifeFrame::LifeFrame() : wxFrame((wxFrame *)0, -1, _("Life!"), wxPoint(200, 200)
     wxBoxSizer *sizer2 = new wxBoxSizer(wxVERTICAL);
     wxBoxSizer *sizer3 = new wxBoxSizer(wxVERTICAL);
 
     wxBoxSizer *sizer2 = new wxBoxSizer(wxVERTICAL);
     wxBoxSizer *sizer3 = new wxBoxSizer(wxVERTICAL);
 

-    sizer1->Add( new wxStaticLine(panel1, -1), 0, wxGROW );
+    sizer1->Add( new wxStaticLine(panel1, wxID_ANY), 0, wxGROW );

     sizer1->Add( m_canvas, 1, wxGROW | wxALL, 2 );
     sizer1->Add( m_canvas, 1, wxGROW | wxALL, 2 );

-    sizer1->Add( new wxStaticLine(panel1, -1), 0, wxGROW );
+    sizer1->Add( new wxStaticLine(panel1, wxID_ANY), 0, wxGROW );

     panel1->SetSizer( sizer1 );
     panel1->SetSizer( sizer1 );

-    panel1->SetAutoLayout( TRUE );

     sizer1->Fit( panel1 );
 
     sizer2->Add( m_text, 0, wxGROW | wxTOP, 4 );
     sizer2->Add( slider, 0, wxCENTRE | wxALL, 4 );
     sizer1->Fit( panel1 );
 
     sizer2->Add( m_text, 0, wxGROW | wxTOP, 4 );
     sizer2->Add( slider, 0, wxCENTRE | wxALL, 4 );

+

     panel2->SetSizer( sizer2 );
     panel2->SetSizer( sizer2 );

-    panel2->SetAutoLayout( TRUE );

     sizer2->Fit( panel2 );
 
     sizer3->Add( panel1, 1, wxGROW );
     sizer3->Add( panel2, 0, wxGROW );
     SetSizer( sizer3 );
     sizer2->Fit( panel2 );
 
     sizer3->Add( panel1, 1, wxGROW );
     sizer3->Add( panel2, 0, wxGROW );
     SetSizer( sizer3 );

-    SetAutoLayout( TRUE );

     sizer3->Fit( this );
 
     // set minimum frame size
     sizer3->Fit( this );
 
     // set minimum frame size


@@ -326,79 +352,114 @@ void LifeFrame::UpdateUI()
     // start / stop
     GetToolBar()->EnableTool(ID_START, !m_running);
     GetToolBar()->EnableTool(ID_STOP,  m_running);
     // start / stop
     GetToolBar()->EnableTool(ID_START, !m_running);
     GetToolBar()->EnableTool(ID_STOP,  m_running);

-    GetMenuBar()->GetMenu(2)->Enable(ID_START, !m_running);
-    GetMenuBar()->GetMenu(2)->Enable(ID_STEP,  !m_running);
-    GetMenuBar()->GetMenu(2)->Enable(ID_STOP,  m_running);
+    GetMenuBar()->Enable(ID_START, !m_running);
+    GetMenuBar()->Enable(ID_STEP,  !m_running);
+    GetMenuBar()->Enable(ID_STOP,  m_running);
+    GetMenuBar()->Enable(ID_TOPSPEED, !m_topspeed);

 
     // zooming
     int cellsize = m_canvas->GetCellSize();
     GetToolBar()->EnableTool(ID_ZOOMIN,  cellsize < 32);
     GetToolBar()->EnableTool(ID_ZOOMOUT, cellsize > 1);
 
     // zooming
     int cellsize = m_canvas->GetCellSize();
     GetToolBar()->EnableTool(ID_ZOOMIN,  cellsize < 32);
     GetToolBar()->EnableTool(ID_ZOOMOUT, cellsize > 1);

-    GetMenuBar()->GetMenu(1)->Enable(ID_ZOOMIN,  cellsize < 32);
-    GetMenuBar()->GetMenu(1)->Enable(ID_ZOOMOUT, cellsize > 1);
+    GetMenuBar()->Enable(ID_ZOOMIN,  cellsize < 32);
+    GetMenuBar()->Enable(ID_ZOOMOUT, cellsize > 1);

 }
 
 }
 

-// event handlers
+// Event handlers -----------------------------------------------------------
+
+// OnMenu handles all events which don't have their own event handler

 void LifeFrame::OnMenu(wxCommandEvent& event)
 {
     switch (event.GetId())
     {
 void LifeFrame::OnMenu(wxCommandEvent& event)
 {
     switch (event.GetId())
     {

-        case ID_START   : OnStart(); break;
-        case ID_STEP    : OnStep(); break;
-        case ID_STOP    : OnStop(); break;
-        case ID_SHOWNAV :
+        case wxID_NEW:
+        {
+            // stop if it was running
+            OnStop();
+            m_life->Clear();
+            m_canvas->Recenter(0, 0);
+            m_tics = 0;
+            UpdateInfoText();
+            break;
+        }
+        case wxID_ABOUT:
+        {
+            LifeAboutDialog dialog(this);
+            dialog.ShowModal();
+            break;
+        }
+        case wxID_EXIT:
+        {
+            // true is to force the frame to close
+            Close(true);
+            break;
+        }
+        case ID_SHOWNAV:

         {
             bool checked = GetMenuBar()->GetMenu(1)->IsChecked(ID_SHOWNAV);
             m_navigator->Show(checked);
             break;
         }
         {
             bool checked = GetMenuBar()->GetMenu(1)->IsChecked(ID_SHOWNAV);
             m_navigator->Show(checked);
             break;
         }

+        case ID_INFO:
+        {
+            wxString desc = m_life->GetDescription();
+
+            if ( desc.IsEmpty() )
+                desc = _("Not available");
+
+            // should we make the description editable here?
+            wxMessageBox(desc, _("Description"), wxOK | wxICON_INFORMATION);
+
+            break;
+        }
+        case ID_START   : OnStart(); break;
+        case ID_STEP    : OnStep(); break;
+        case ID_STOP    : OnStop(); break;

         case ID_TOPSPEED:
         {
         case ID_TOPSPEED:
         {

-            m_running = TRUE;
-            m_topspeed = TRUE;
+            m_running = true;
+            m_topspeed = true;

             UpdateUI();
             UpdateUI();

-            while (m_running && m_topspeed)           
+            while (m_running && m_topspeed)

             {
                 OnStep();
                 wxYield();
             }
             break;
         }
             {
                 OnStep();
                 wxYield();
             }
             break;
         }

-        case ID_RESET:
+    }
+}
+
+void LifeFrame::OnOpen(wxCommandEvent& WXUNUSED(event))
+{
+    wxFileDialog filedlg(this,
+                         _("Choose a file to open"),
+                         wxEmptyString,
+                         wxEmptyString,
+                         _("Life patterns (*.lif)|*.lif|All files (*.*)|*.*"),
+                         wxOPEN | wxFILE_MUST_EXIST);
+
+    if (filedlg.ShowModal() == wxID_OK)
+    {
+        wxFileInputStream stream(filedlg.GetPath());
+        LifeReader reader(stream);
+
+        // the reader handles errors itself, no need to do anything here
+        if (reader.IsOk())

         {
         {

-            // stop if it was running
+            // stop if running and put the pattern

             OnStop();
             m_life->Clear();
             OnStop();
             m_life->Clear();

+            m_life->SetPattern(reader.GetPattern());
+
+            // recenter canvas

             m_canvas->Recenter(0, 0);
             m_tics = 0;
             UpdateInfoText();
             m_canvas->Recenter(0, 0);
             m_tics = 0;
             UpdateInfoText();

-            break;
-        }
-        case ID_ABOUT:
-        {
-            LifeAboutDialog dialog(this);
-            dialog.ShowModal();
-            break;
-        }
-        case ID_EXIT :
-        {
-            // TRUE is to force the frame to close
-            Close(TRUE);
-            break;

         }
     }
 }
 
         }
     }
 }
 

-void LifeFrame::OnClose(wxCloseEvent& WXUNUSED(event))
-{
-    // Stop if it was running; this is absolutely needed because
-    // the frame won't be actually destroyed until there are no
-    // more pending events, and this in turn won't ever happen
-    // if the timer is running faster than the window can redraw.
-    OnStop();
-    Destroy();   
-}
-

 void LifeFrame::OnSamples(wxCommandEvent& WXUNUSED(event))
 {
     // stop if it was running
 void LifeFrame::OnSamples(wxCommandEvent& WXUNUSED(event))
 {
     // stop if it was running


@@ -409,11 +470,11 @@ void LifeFrame::OnSamples(wxCommandEvent& WXUNUSED(event))
 
     if (dialog.ShowModal() == wxID_OK)
     {
 
     if (dialog.ShowModal() == wxID_OK)
     {

-        const LifeShape shape = dialog.GetShape();
+        const LifePattern pattern = dialog.GetPattern();

 
 

-        // put the shape
+        // put the pattern

         m_life->Clear();
         m_life->Clear();

-        m_life->SetShape(shape);
+        m_life->SetPattern(pattern);

 
         // recenter canvas
         m_canvas->Recenter(0, 0);
 
         // recenter canvas
         m_canvas->Recenter(0, 0);


@@ -440,7 +501,7 @@ void LifeFrame::OnZoom(wxCommandEvent& event)
 
 void LifeFrame::OnNavigate(wxCommandEvent& event)
 {
 
 void LifeFrame::OnNavigate(wxCommandEvent& event)
 {

-    Cell c;
+    LifeCell c;

 
     switch (event.GetId())
     {
 
     switch (event.GetId())
     {


@@ -449,6 +510,9 @@ void LifeFrame::OnNavigate(wxCommandEvent& event)
         case ID_WEST:   c = m_life->FindWest(); break;
         case ID_EAST:   c = m_life->FindEast(); break;
         case ID_CENTER: c = m_life->FindCenter(); break;
         case ID_WEST:   c = m_life->FindWest(); break;
         case ID_EAST:   c = m_life->FindEast(); break;
         case ID_CENTER: c = m_life->FindCenter(); break;

+        default :
+            wxFAIL;
+            // Fall through!

         case ID_ORIGIN: c.i = c.j = 0; break;
     }
 
         case ID_ORIGIN: c.i = c.j = 0; break;
     }
 


@@ -464,7 +528,7 @@ void LifeFrame::OnSlider(wxScrollEvent& event)
         OnStop();
         OnStart();
     }
         OnStop();
         OnStart();
     }

-    
+

     UpdateInfoText();
 }
 
     UpdateInfoText();
 }
 


@@ -473,12 +537,22 @@ void LifeFrame::OnTimer(wxTimerEvent& WXUNUSED(event))
     OnStep();
 }
 
     OnStep();
 }
 

+void LifeFrame::OnClose(wxCloseEvent& WXUNUSED(event))
+{
+    // Stop if it was running; this is absolutely needed because
+    // the frame won't be actually destroyed until there are no
+    // more pending events, and this in turn won't ever happen
+    // if the timer is running faster than the window can redraw.
+    OnStop();
+    Destroy();
+}
+

 void LifeFrame::OnStart()
 {
     if (!m_running)
     {
         m_timer->Start(m_interval);
 void LifeFrame::OnStart()
 {
     if (!m_running)
     {
         m_timer->Start(m_interval);

-        m_running = TRUE;
+        m_running = true;

         UpdateUI();
     }
 }
         UpdateUI();
     }
 }


@@ -488,8 +562,8 @@ void LifeFrame::OnStop()
     if (m_running)
     {
         m_timer->Stop();
     if (m_running)
     {
         m_timer->Stop();

-        m_running = FALSE;
-        m_topspeed = FALSE;
+        m_running = false;
+        m_topspeed = false;

         UpdateUI();
     }
 }
         UpdateUI();
     }
 }


@@ -511,29 +585,29 @@ void LifeFrame::OnStep()
 // --------------------------------------------------------------------------
 
 LifeNavigator::LifeNavigator(wxWindow *parent)
 // --------------------------------------------------------------------------
 
 LifeNavigator::LifeNavigator(wxWindow *parent)

-             : wxMiniFrame(parent, -1,
+             : wxMiniFrame(parent, wxID_ANY,

                            _("Navigation"),
                            wxDefaultPosition,
                            wxDefaultSize,
                            wxCAPTION | wxSIMPLE_BORDER)
 {
                            _("Navigation"),
                            wxDefaultPosition,
                            wxDefaultSize,
                            wxCAPTION | wxSIMPLE_BORDER)
 {

-    wxPanel    *panel  = new wxPanel(this, -1);
+    wxPanel    *panel  = new wxPanel(this, wxID_ANY);

     wxBoxSizer *sizer1 = new wxBoxSizer(wxVERTICAL);
     wxBoxSizer *sizer2 = new wxBoxSizer(wxHORIZONTAL);
 
     // create bitmaps and masks for the buttons
     wxBitmap
         bmpn = wxBITMAP(north),
     wxBoxSizer *sizer1 = new wxBoxSizer(wxVERTICAL);
     wxBoxSizer *sizer2 = new wxBoxSizer(wxHORIZONTAL);
 
     // create bitmaps and masks for the buttons
     wxBitmap
         bmpn = wxBITMAP(north),

-        bmpw = wxBITMAP(west),  
+        bmpw = wxBITMAP(west),

         bmpc = wxBITMAP(center),
         bmpc = wxBITMAP(center),

-        bmpe = wxBITMAP(east),  
+        bmpe = wxBITMAP(east),

         bmps = wxBITMAP(south);
 
         bmps = wxBITMAP(south);
 

-#ifdef __WXMSW__
+#if !defined(__WXGTK__) && !defined(__WXMOTIF__) && !defined(__WXMAC__)

     bmpn.SetMask(new wxMask(bmpn, *wxLIGHT_GREY));
     bmpw.SetMask(new wxMask(bmpw, *wxLIGHT_GREY));
     bmpc.SetMask(new wxMask(bmpc, *wxLIGHT_GREY));
     bmpn.SetMask(new wxMask(bmpn, *wxLIGHT_GREY));
     bmpw.SetMask(new wxMask(bmpw, *wxLIGHT_GREY));
     bmpc.SetMask(new wxMask(bmpc, *wxLIGHT_GREY));

-    bmpe.SetMask(new wxMask(bmpe, *wxLIGHT_GREY)); 
+    bmpe.SetMask(new wxMask(bmpe, *wxLIGHT_GREY));

     bmps.SetMask(new wxMask(bmps, *wxLIGHT_GREY));
 #endif
 
     bmps.SetMask(new wxMask(bmps, *wxLIGHT_GREY));
 #endif
 


@@ -545,11 +619,13 @@ LifeNavigator::LifeNavigator(wxWindow *parent)
         *be = new wxBitmapButton(panel, ID_EAST ,  bmpe),
         *bs = new wxBitmapButton(panel, ID_SOUTH,  bmps);
 
         *be = new wxBitmapButton(panel, ID_EAST ,  bmpe),
         *bs = new wxBitmapButton(panel, ID_SOUTH,  bmps);
 

+#if wxUSE_TOOLTIPS

     bn->SetToolTip(_("Find northernmost cell"));
     bw->SetToolTip(_("Find westernmost cell"));
     bc->SetToolTip(_("Find center of mass"));
     be->SetToolTip(_("Find easternmost cell"));
     bs->SetToolTip(_("Find southernmost cell"));
     bn->SetToolTip(_("Find northernmost cell"));
     bw->SetToolTip(_("Find westernmost cell"));
     bc->SetToolTip(_("Find center of mass"));
     be->SetToolTip(_("Find easternmost cell"));
     bs->SetToolTip(_("Find southernmost cell"));

+#endif

 
     // add buttons to sizers
     sizer2->Add( bw, 0, wxCENTRE | wxWEST,  4 );
 
     // add buttons to sizers
     sizer2->Add( bw, 0, wxCENTRE | wxWEST,  4 );


@@ -559,11 +635,13 @@ LifeNavigator::LifeNavigator(wxWindow *parent)
     sizer1->Add( sizer2 );
     sizer1->Add( bs, 0, wxCENTRE | wxSOUTH, 4 );
 
     sizer1->Add( sizer2 );
     sizer1->Add( bs, 0, wxCENTRE | wxSOUTH, 4 );
 

-    // set the miniframe size
+    // set the panel and miniframe size

     panel->SetSizer(sizer1);
     panel->SetSizer(sizer1);

-    panel->SetAutoLayout(TRUE);
-    sizer1->Fit(this);
-    sizer1->SetSizeHints(this);
+
+    sizer1->Fit(panel);
+    SetClientSize(panel->GetSize());
+    wxSize sz = GetSize();
+    SetSizeHints(sz.x, sz.y, sz.x, sz.y);

 
     // move it to a sensible position
     wxRect parentRect = parent->GetRect();
 
     // move it to a sensible position
     wxRect parentRect = parent->GetRect();


@@ -575,11 +653,12 @@ LifeNavigator::LifeNavigator(wxWindow *parent)
     Move(x, y);
 
     // done
     Move(x, y);
 
     // done

-    Show(TRUE);
+    Show(true);

 }
 
 void LifeNavigator::OnClose(wxCloseEvent& event)
 {
 }
 
 void LifeNavigator::OnClose(wxCloseEvent& event)
 {

+    // avoid if we can

     if (event.CanVeto())
         event.Veto();
     else
     if (event.CanVeto())
         event.Veto();
     else


@@ -593,8 +672,8 @@ void LifeNavigator::OnClose(wxCloseEvent& event)
 
 // canvas constructor
 LifeCanvas::LifeCanvas(wxWindow *parent, Life *life, bool interactive)
 
 // canvas constructor
 LifeCanvas::LifeCanvas(wxWindow *parent, Life *life, bool interactive)

-          : wxWindow(parent, -1, wxPoint(0, 0), wxSize(100, 100),
-            wxSUNKEN_BORDER)
+          : wxWindow(parent, wxID_ANY, wxDefaultPosition, wxSize(100, 100),
+            wxSUNKEN_BORDER|wxFULL_REPAINT_ON_RESIZE)

 {
     m_life        = life;
     m_interactive = interactive;
 {
     m_life        = life;
     m_interactive = interactive;


@@ -609,12 +688,12 @@ LifeCanvas::LifeCanvas(wxWindow *parent, Life *life, bool interactive)
         SetCursor(*wxCROSS_CURSOR);
 
     // reduce flicker if wxEVT_ERASE_BACKGROUND is not available
         SetCursor(*wxCROSS_CURSOR);
 
     // reduce flicker if wxEVT_ERASE_BACKGROUND is not available

-    SetBackgroundColour(*wxWHITE);       
+    SetBackgroundColour(*wxWHITE);

 }
 
 LifeCanvas::~LifeCanvas()
 {
 }
 
 LifeCanvas::~LifeCanvas()
 {

-    delete m_life;   
+    delete m_life;

 }
 
 // recenter at the given position
 }
 
 // recenter at the given position


@@ -624,7 +703,7 @@ void LifeCanvas::Recenter(wxInt32 i, wxInt32 j)
     m_viewportY = j - m_viewportH / 2;
 
     // redraw everything
     m_viewportY = j - m_viewportH / 2;
 
     // redraw everything

-    Refresh(FALSE);
+    Refresh(false);

 }
 
 // set the cell size and refresh display
 }
 
 // set the cell size and refresh display


@@ -641,7 +720,7 @@ void LifeCanvas::SetCellSize(int cellsize)
     GetClientSize(&w, &h);
     m_viewportW = (w + m_cellsize - 1) / m_cellsize;
     m_viewportH = (h + m_cellsize - 1) / m_cellsize;
     GetClientSize(&w, &h);
     m_viewportW = (w + m_cellsize - 1) / m_cellsize;
     m_viewportH = (h + m_cellsize - 1) / m_cellsize;

-    
+

     // recenter
     m_viewportX = cx - m_viewportW / 2;
     m_viewportY = cy - m_viewportH / 2;
     // recenter
     m_viewportX = cx - m_viewportW / 2;
     m_viewportY = cy - m_viewportH / 2;


@@ -654,8 +733,8 @@ void LifeCanvas::SetCellSize(int cellsize)
         m_thumbX = m_viewportW;
         m_thumbY = m_viewportH;
     }
         m_thumbX = m_viewportW;
         m_thumbY = m_viewportH;
     }

-    
-    Refresh(FALSE);
+
+    Refresh(false);

 }
 
 // draw a cell
 }
 
 // draw a cell


@@ -696,15 +775,15 @@ void LifeCanvas::DrawChanged()
     wxClientDC dc(this);
 
     size_t ncells;
     wxClientDC dc(this);
 
     size_t ncells;

-    Cell *cells;
-    bool done = FALSE;
+    LifeCell *cells;
+    bool done = false;

 
     m_life->BeginFind(m_viewportX,
                       m_viewportY,
                       m_viewportX + m_viewportW,
                       m_viewportY + m_viewportH,
 
     m_life->BeginFind(m_viewportX,
                       m_viewportY,
                       m_viewportX + m_viewportW,
                       m_viewportY + m_viewportH,

-                      TRUE);
-   
+                      true);
+

     dc.BeginDrawing();
 
     if (m_cellsize == 1)
     dc.BeginDrawing();
 
     if (m_cellsize == 1)


@@ -729,7 +808,7 @@ void LifeCanvas::DrawChanged()
 }
 
 // event handlers
 }
 
 // event handlers

-void LifeCanvas::OnPaint(wxPaintEvent& event)
+void LifeCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))

 {
     wxPaintDC dc(this);
     wxRect  rect = GetUpdateRegion().GetBox();
 {
     wxPaintDC dc(this);
     wxRect  rect = GetUpdateRegion().GetBox();


@@ -748,11 +827,10 @@ void LifeCanvas::OnPaint(wxPaintEvent& event)
     j1 = YToCell(y + h - 1);
 
     size_t ncells;
     j1 = YToCell(y + h - 1);
 
     size_t ncells;

-    Cell *cells;
-    bool done = FALSE;
+    LifeCell *cells;

 
 

-    m_life->BeginFind(i0, j0, i1, j1, FALSE);
-    done = m_life->FindMore(&cells, &ncells);
+    m_life->BeginFind(i0, j0, i1, j1, false);
+    bool done = m_life->FindMore(&cells, &ncells);

 
     // erase all damaged cells and draw the grid
     dc.BeginDrawing();
 
     // erase all damaged cells and draw the grid
     dc.BeginDrawing();


@@ -811,19 +889,26 @@ void LifeCanvas::OnMouse(wxMouseEvent& event)
     msg.Printf(_("Cell: (%d, %d)"), i, j);
     ((LifeFrame *) wxGetApp().GetTopWindow())->SetStatusText(msg, 1);
 
     msg.Printf(_("Cell: (%d, %d)"), i, j);
     ((LifeFrame *) wxGetApp().GetTopWindow())->SetStatusText(msg, 1);
 

-    // button pressed?
+    // NOTE that wxMouseEvent::LeftDown() and wxMouseEvent::LeftIsDown()
+    // have different semantics. The first one is used to signal that the
+    // button was just pressed (i.e., in "button down" events); the second
+    // one just describes the current status of the button, independently
+    // of the mouse event type. LeftIsDown is typically used in "mouse
+    // move" events, to test if the button is _still_ pressed.
+
+    // is the button down?

     if (!event.LeftIsDown())
     {
         m_status = MOUSE_NOACTION;
         return;
     }
 
     if (!event.LeftIsDown())
     {
         m_status = MOUSE_NOACTION;
         return;
     }
 

-    // button just pressed?
-    if (m_status == MOUSE_NOACTION)
+    // was it pressed just now?
+    if (event.LeftDown())

     {
     {

-        // yes, update status and toggle this cell
+        // yes: start a new action and toggle this cell

         m_status = (m_life->IsAlive(i, j)? MOUSE_ERASING : MOUSE_DRAWING);
         m_status = (m_life->IsAlive(i, j)? MOUSE_ERASING : MOUSE_DRAWING);

-            
+

         m_mi = i;
         m_mj = j;
         m_life->SetCell(i, j, m_status == MOUSE_DRAWING);
         m_mi = i;
         m_mj = j;
         m_life->SetCell(i, j, m_status == MOUSE_DRAWING);


@@ -831,6 +916,7 @@ void LifeCanvas::OnMouse(wxMouseEvent& event)
     }
     else if ((m_mi != i) || (m_mj != j))
     {
     }
     else if ((m_mi != i) || (m_mj != j))
     {

+        // no: continue ongoing action

         bool alive = (m_status == MOUSE_DRAWING);
 
         // prepare DC and pen + brush to optimize drawing
         bool alive = (m_status == MOUSE_DRAWING);
 
         // prepare DC and pen + brush to optimize drawing


@@ -850,12 +936,12 @@ void LifeCanvas::OnMouse(wxMouseEvent& event)
 
         ii = m_mi;
         jj = m_mj;
 
         ii = m_mi;
         jj = m_mj;

-  
+

         if (ai > aj)
         {
             // iterate over i
         if (ai > aj)
         {
             // iterate over i

-            d = aj - (ai >> 1);        
-               
+            d = aj - (ai >> 1);
+

             while (ii != i)
             {
                 m_life->SetCell(ii, jj, alive);
             while (ii != i)
             {
                 m_life->SetCell(ii, jj, alive);


@@ -863,7 +949,7 @@ void LifeCanvas::OnMouse(wxMouseEvent& event)
                 if (d >= 0)
                 {
                     jj += sj;
                 if (d >= 0)
                 {
                     jj += sj;

-                    d  -= ai;   
+                    d  -= ai;

                 }
                 ii += si;
                 d  += aj;
                 }
                 ii += si;
                 d  += aj;


@@ -881,7 +967,7 @@ void LifeCanvas::OnMouse(wxMouseEvent& event)
                 if (d >= 0)
                 {
                     ii += si;
                 if (d >= 0)
                 {
                     ii += si;

-                    d  -= aj;   
+                    d  -= aj;

                 }
                 jj += sj;
                 d  += ai;
                 }
                 jj += sj;
                 d  += ai;


@@ -937,51 +1023,65 @@ void LifeCanvas::OnScroll(wxScrollWinEvent& event)
 
     // calculate scroll increment
     int scrollinc = 0;
 
     // calculate scroll increment
     int scrollinc = 0;

-    switch (type)
+    if (type == wxEVT_SCROLLWIN_TOP)

     {
     {

-        case wxEVT_SCROLLWIN_TOP:
-        {
-            if (orient == wxHORIZONTAL)
-                scrollinc = -m_viewportW;
-            else
-                scrollinc = -m_viewportH;
-            break;    
-        }
-        case wxEVT_SCROLLWIN_BOTTOM:
-        {
-            if (orient == wxHORIZONTAL)
-                scrollinc = m_viewportW;
-            else
-                scrollinc = m_viewportH;
-            break;    
-        }
-        case wxEVT_SCROLLWIN_LINEUP:   scrollinc = -1; break;
-        case wxEVT_SCROLLWIN_LINEDOWN: scrollinc = +1; break;
-        case wxEVT_SCROLLWIN_PAGEUP:   scrollinc = -10; break;
-        case wxEVT_SCROLLWIN_PAGEDOWN: scrollinc = +10; break;
-        case wxEVT_SCROLLWIN_THUMBTRACK:
+        if (orient == wxHORIZONTAL)
+            scrollinc = -m_viewportW;
+        else
+            scrollinc = -m_viewportH;
+    }
+    else
+    if (type == wxEVT_SCROLLWIN_BOTTOM)
+    {
+        if (orient == wxHORIZONTAL)
+            scrollinc = m_viewportW;
+        else
+            scrollinc = m_viewportH;
+    }
+    else
+    if (type == wxEVT_SCROLLWIN_LINEUP)
+    {
+        scrollinc = -1;
+    }
+    else
+    if (type == wxEVT_SCROLLWIN_LINEDOWN)
+    {
+        scrollinc = +1;
+    }
+    else
+    if (type == wxEVT_SCROLLWIN_PAGEUP)
+    {
+        scrollinc = -10;
+    }
+    else
+    if (type == wxEVT_SCROLLWIN_PAGEDOWN)
+    {
+        scrollinc = +10;
+    }
+    else
+    if (type == wxEVT_SCROLLWIN_THUMBTRACK)
+    {
+        if (orient == wxHORIZONTAL)

         {
         {

-            if (orient == wxHORIZONTAL)
-            {
-                scrollinc = pos - m_thumbX;
-                m_thumbX = pos;
-            }
-            else
-            {
-                scrollinc = pos - m_thumbY;
-                m_thumbY = pos;
-            }
-            break;
+            scrollinc = pos - m_thumbX;
+            m_thumbX = pos;

         }
         }

-        case wxEVT_SCROLLWIN_THUMBRELEASE:
+        else

         {
         {

-            m_thumbX = m_viewportW;
-            m_thumbY = m_viewportH;
+            scrollinc = pos - m_thumbY;
+            m_thumbY = pos;

         }
     }
         }
     }

+    else
+    if (type == wxEVT_SCROLLWIN_THUMBRELEASE)
+    {
+        m_thumbX = m_viewportW;
+        m_thumbY = m_viewportH;
+    }

 
 

-#if defined (__WXGTK__) || defined(__WXMOTIF__) // what about Motif?
-    // wxGTK updates the thumb automatically (wxMSW doesn't); reset it back
+#if defined(__WXGTK__) || defined(__WXMOTIF__)
+    // wxGTK and wxMotif update the thumb automatically (wxMSW doesn't);
+    // so reset it back as we always want it to be in the same position.

     if (type != wxEVT_SCROLLWIN_THUMBTRACK)
     {
         SetScrollbar(wxHORIZONTAL, m_viewportW, m_viewportW, 3 * m_viewportW);
     if (type != wxEVT_SCROLLWIN_THUMBTRACK)
     {
         SetScrollbar(wxHORIZONTAL, m_viewportW, m_viewportW, 3 * m_viewportW);


@@ -990,7 +1090,7 @@ void LifeCanvas::OnScroll(wxScrollWinEvent& event)
 #endif
 
     if (scrollinc == 0) return;
 #endif
 
     if (scrollinc == 0) return;

-    
+

     // scroll the window and adjust the viewport
     if (orient == wxHORIZONTAL)
     {
     // scroll the window and adjust the viewport
     if (orient == wxHORIZONTAL)
     {


@@ -999,7 +1099,7 @@ void LifeCanvas::OnScroll(wxScrollWinEvent& event)
     }
     else
     {
     }
     else
     {

-        m_viewportY += scrollinc;    
+        m_viewportY += scrollinc;

         ScrollWindow( 0, -m_cellsize * scrollinc, (const wxRect *) NULL);
     }
 }
         ScrollWindow( 0, -m_cellsize * scrollinc, (const wxRect *) NULL);
     }
 }