]> git.saurik.com Git - wxWidgets.git/blobdiff - samples/propgrid/propgrid.cpp
For wxGTK2, link with X11 explicitly, since we use many X11 functions directly.
[wxWidgets.git] / samples / propgrid / propgrid.cpp
index 16dc91e8abed7e88b2370d7464186ada3386da9b..4d36f39bfe04b8fd600f6e2ee87db7e2c0cde1ac 100644 (file)
@@ -6,7 +6,7 @@
 // Created:     2004-09-25
 // RCS-ID:      $Id$
 // Copyright:   (c) Jaakko Salli
-// Licence:     wxWindows license
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 //
@@ -198,267 +198,6 @@ private:
 
 #endif // wxUSE_VALIDATORS
 
-// -----------------------------------------------------------------------
-// AdvImageFile Property
-// -----------------------------------------------------------------------
-
-class wxMyImageInfo;
-
-WX_DECLARE_OBJARRAY(wxMyImageInfo, wxArrayMyImageInfo);
-
-class wxMyImageInfo
-{
-public:
-    wxString    m_path;
-    wxBitmap*   m_pThumbnail1; // smaller thumbnail
-    wxBitmap*   m_pThumbnail2; // larger thumbnail
-
-    wxMyImageInfo ( const wxString& str )
-    {
-        m_path = str;
-        m_pThumbnail1 = (wxBitmap*) NULL;
-        m_pThumbnail2 = (wxBitmap*) NULL;
-    }
-    virtual ~wxMyImageInfo()
-    {
-        if ( m_pThumbnail1 )
-            delete m_pThumbnail1;
-        if ( m_pThumbnail2 )
-            delete m_pThumbnail2;
-    }
-
-};
-
-
-#include <wx/arrimpl.cpp>
-WX_DEFINE_OBJARRAY(wxArrayMyImageInfo);
-
-wxArrayMyImageInfo  g_myImageArray;
-
-
-// Preferred thumbnail height.
-#define PREF_THUMBNAIL_HEIGHT       64
-
-
-wxPGChoices wxAdvImageFileProperty::ms_choices;
-
-WX_PG_IMPLEMENT_PROPERTY_CLASS(wxAdvImageFileProperty,wxFileProperty,
-                               wxString,const wxString&,ChoiceAndButton)
-
-
-wxAdvImageFileProperty::wxAdvImageFileProperty( const wxString& label,
-                                                          const wxString& name,
-                                                          const wxString& value)
-    : wxFileProperty(label,name,value)
-{
-    m_wildcard = wxPGGetDefaultImageWildcard();
-
-    m_index = -1;
-
-    m_pImage = (wxImage*) NULL;
-
-    // Only show names.
-    m_flags &= ~(wxPG_PROP_SHOW_FULL_FILENAME);
-}
-
-wxAdvImageFileProperty::~wxAdvImageFileProperty ()
-{
-    // Delete old image
-    if ( m_pImage )
-    {
-        delete m_pImage;
-        m_pImage = (wxImage*) NULL;
-    }
-}
-
-void wxAdvImageFileProperty::OnSetValue()
-{
-    wxFileProperty::OnSetValue();
-
-    // Delete old image
-    if ( m_pImage )
-    {
-        delete m_pImage;
-        m_pImage = (wxImage*) NULL;
-    }
-
-    wxString imagename = GetValueAsString(0);
-
-    if ( imagename.length() )
-    {
-        wxFileName filename = GetFileName();
-        size_t prevCount = g_myImageArray.GetCount();
-        int index = ms_choices.Index(imagename);
-
-        // If not in table, add now.
-        if ( index == wxNOT_FOUND )
-        {
-            ms_choices.Add( imagename );
-            g_myImageArray.Add( new wxMyImageInfo( filename.GetFullPath() ) );
-
-            index = g_myImageArray.GetCount() - 1;
-        }
-
-        // If no thumbnail ready, then need to load image.
-        if ( !g_myImageArray[index].m_pThumbnail2 )
-        {
-            // Load if file exists.
-            if ( filename.FileExists() )
-                m_pImage = new wxImage( filename.GetFullPath() );
-        }
-
-        m_index = index;
-
-        wxPropertyGrid* pg = GetGrid();
-        wxWindow* control = pg->GetEditorControl();
-
-        if ( pg->GetSelection() == this && control )
-        {
-            wxString name = GetValueAsString(0);
-
-            if ( g_myImageArray.GetCount() != prevCount )
-            {
-                wxASSERT( g_myImageArray.GetCount() == (prevCount+1) );
-
-                // Add to the control's array.
-                // (should be added to own array earlier)
-
-                if ( control )
-                    GetEditorClass()->InsertItem(control, name, -1);
-            }
-
-            if ( control )
-               GetEditorClass()->UpdateControl(this, control);
-        }
-    }
-    else
-        m_index = -1;
-}
-
-bool wxAdvImageFileProperty::IntToValue( wxVariant& variant, int number, int WXUNUSED(argFlags) ) const
-{
-    wxASSERT( number >= 0 );
-    return StringToValue( variant, ms_choices.GetLabel(number), wxPG_FULL_VALUE );
-}
-
-bool wxAdvImageFileProperty::OnEvent( wxPropertyGrid* propgrid, wxWindow* primary,
-   wxEvent& event )
-{
-    if ( propgrid->IsMainButtonEvent(event) )
-    {
-        return wxFileProperty::OnEvent(propgrid,primary,event);
-    }
-    return false;
-}
-
-wxSize wxAdvImageFileProperty::OnMeasureImage( int item ) const
-{
-    if ( item == -1 )
-        return wxPG_DEFAULT_IMAGE_SIZE;
-
-    return wxSize(PREF_THUMBNAIL_HEIGHT,PREF_THUMBNAIL_HEIGHT);
-}
-
-void wxAdvImageFileProperty::LoadThumbnails( size_t index )
-{
-    wxMyImageInfo& mii = g_myImageArray[index];
-
-    if ( !mii.m_pThumbnail2 )
-    {
-        wxFileName filename = GetFileName();
-
-        if ( !m_pImage || !m_pImage->Ok() ||
-             filename != mii.m_path
-           )
-        {
-            if ( m_pImage )
-                delete m_pImage;
-            m_pImage = new wxImage( mii.m_path );
-        }
-
-        if ( m_pImage && m_pImage->Ok() )
-        {
-            int im_wid = m_pImage->GetWidth();
-            int im_hei = m_pImage->GetHeight();
-            if ( im_hei > PREF_THUMBNAIL_HEIGHT )
-            {
-                // TNW = (TNH*IW)/IH
-                im_wid = (PREF_THUMBNAIL_HEIGHT*m_pImage->GetWidth())/m_pImage->GetHeight();
-                im_hei = PREF_THUMBNAIL_HEIGHT;
-            }
-
-            m_pImage->Rescale( im_wid, im_hei );
-
-            mii.m_pThumbnail2 = new wxBitmap( *m_pImage );
-
-            wxSize cis = GetParentState()->GetGrid()->GetImageSize();
-            m_pImage->Rescale ( cis.x, cis.y );
-
-            mii.m_pThumbnail1 = new wxBitmap( *m_pImage );
-
-        }
-
-        if ( m_pImage )
-        {
-            delete m_pImage;
-            m_pImage = (wxImage*) NULL;
-        }
-    }
-}
-
-void wxAdvImageFileProperty::OnCustomPaint( wxDC& dc,
-                                                 const wxRect& rect,
-                                                 wxPGPaintData& pd )
-{
-    int index = m_index;
-    if ( pd.m_choiceItem >= 0 )
-        index = pd.m_choiceItem;
-
-    //wxLogDebug(wxT("%i"),index);
-
-    if ( index >= 0 )
-    {
-        LoadThumbnails(index);
-
-        // Is this a measure item call?
-        if ( rect.x < 0 )
-        {
-            // Variable height
-            //pd.m_drawnHeight = PREF_THUMBNAIL_HEIGHT;
-            wxBitmap* pBitmap = (wxBitmap*)g_myImageArray[index].m_pThumbnail2;
-            if ( pBitmap )
-                pd.m_drawnHeight = pBitmap->GetHeight();
-            else
-                pd.m_drawnHeight = 16;
-            return;
-        }
-
-        // Draw the thumbnail
-
-        wxBitmap* pBitmap;
-
-        if ( pd.m_choiceItem >= 0 )
-            pBitmap = (wxBitmap*)g_myImageArray[index].m_pThumbnail2;
-        else
-            pBitmap = (wxBitmap*)g_myImageArray[index].m_pThumbnail1;
-
-        if ( pBitmap )
-        {
-            dc.DrawBitmap ( *pBitmap, rect.x, rect.y, FALSE );
-
-            // Tell the caller how wide we drew.
-            pd.m_drawnWidth = pBitmap->GetWidth();
-
-            return;
-        }
-    }
-
-    // No valid file - just draw a white box.
-    dc.SetBrush ( *wxWHITE_BRUSH );
-    dc.DrawRectangle ( rect );
-}
-
-
 // -----------------------------------------------------------------------
 // wxVectorProperty
 // -----------------------------------------------------------------------
@@ -583,7 +322,7 @@ public:
         wxString s = ::wxGetSingleChoice(wxT("Message"),
                                          wxT("Caption"),
                                          m_choices.GetLabels());
-        if ( s.length() )
+        if ( !s.empty() )
         {
             SetValue(s);
             return true;
@@ -644,6 +383,7 @@ enum
     ID_INSERTPROP,
     ID_INSERTCAT,
     ID_ENABLE,
+    ID_SETREADONLY,
     ID_HIDE,
     ID_DELETE,
     ID_DELETER,
@@ -690,7 +430,8 @@ enum
     ID_RUNMINIMAL,
     ID_ENABLELABELEDITING,
     ID_VETOCOLDRAG,
-    ID_SHOWHEADER
+    ID_SHOWHEADER,
+    ID_ONEXTENDEDKEYNAV
 };
 
 // -----------------------------------------------------------------------
@@ -748,12 +489,14 @@ BEGIN_EVENT_TABLE(FormMain, wxFrame)
     EVT_MENU( ID_UNSPECIFY, FormMain::OnMisc )
     EVT_MENU( ID_DELETEALL, FormMain::OnClearClick )
     EVT_MENU( ID_ENABLE, FormMain::OnEnableDisable )
-    EVT_MENU( ID_HIDE, FormMain::OnHideShow )
+    EVT_MENU( ID_SETREADONLY, FormMain::OnSetReadOnly )
+    EVT_MENU( ID_HIDE, FormMain::OnHide )
 
     EVT_MENU( ID_ITERATE1, FormMain::OnIterate1Click )
     EVT_MENU( ID_ITERATE2, FormMain::OnIterate2Click )
     EVT_MENU( ID_ITERATE3, FormMain::OnIterate3Click )
     EVT_MENU( ID_ITERATE4, FormMain::OnIterate4Click )
+    EVT_MENU( ID_ONEXTENDEDKEYNAV, FormMain::OnExtendedKeyNav )
     EVT_MENU( ID_SETBGCOLOUR, FormMain::OnSetBackgroundColour )
     EVT_MENU( ID_SETBGCOLOURRECUR, FormMain::OnSetBackgroundColour )
     EVT_MENU( ID_CLEARMODIF, FormMain::OnClearModifyStatusClick )
@@ -907,7 +650,7 @@ void FormMain::OnPropertyGridChanging( wxPropertyGridEvent& event )
             event.Veto();
 
             // Since we ask a question, it is better if we omit any validation
-            // failure behavior.
+            // failure behaviour.
             event.SetValidationFailureBehavior(0);
         }
     }
@@ -924,25 +667,36 @@ void FormMain::OnPropertyGridChange( wxPropertyGridEvent& event )
     wxPGProperty* property = event.GetProperty();
 
     const wxString& name = property->GetName();
-    wxVariant value = property->GetValue();
+
+    // Properties store values internally as wxVariants, but it is preferred
+    // to use the more modern wxAny at the interface level
+    wxAny value = property->GetValue();
 
     // Don't handle 'unspecified' values
     if ( value.IsNull() )
         return;
 
+    //
+    // FIXME-VC6: In order to compile on Visual C++ 6.0, wxANY_AS()
+    //            macro is used. Unless you want to support this old
+    //            compiler in your own code, you can use the more
+    //            nicer form value.As<FOO>() instead of
+    //            wxANY_AS(value, FOO).
+    //
+
     // Some settings are disabled outside Windows platform
     if ( name == wxT("X") )
-        SetSize ( m_pPropGridManager->GetPropertyValueAsInt(property), -1, -1, -1, wxSIZE_USE_EXISTING );
+        SetSize( wxANY_AS(value, int), -1, -1, -1, wxSIZE_USE_EXISTING );
     else if ( name == wxT("Y") )
     // wxPGVariantToInt is safe long int value getter
-        SetSize ( -1, value.GetLong(), -1, -1, wxSIZE_USE_EXISTING );
+        SetSize ( -1, wxANY_AS(value, int), -1, -1, wxSIZE_USE_EXISTING );
     else if ( name == wxT("Width") )
-        SetSize ( -1, -1, m_pPropGridManager->GetPropertyValueAsInt(property), -1, wxSIZE_USE_EXISTING );
+        SetSize ( -1, -1, wxANY_AS(value, int), -1, wxSIZE_USE_EXISTING );
     else if ( name == wxT("Height") )
-        SetSize ( -1, -1, -1, value.GetLong(), wxSIZE_USE_EXISTING );
+        SetSize ( -1, -1, -1, wxANY_AS(value, int), wxSIZE_USE_EXISTING );
     else if ( name == wxT("Label") )
     {
-        SetTitle ( m_pPropGridManager->GetPropertyValueAsString(property) );
+        SetTitle( wxANY_AS(value, wxString) );
     }
     else if ( name == wxT("Password") )
     {
@@ -956,8 +710,7 @@ void FormMain::OnPropertyGridChange( wxPropertyGridEvent& event )
     else
     if ( name == wxT("Font") )
     {
-        wxFont font;
-        font << value;
+        wxFont font = wxANY_AS(value, wxFont);
         wxASSERT( font.Ok() );
 
         m_pPropGridManager->SetFont( font );
@@ -965,26 +718,22 @@ void FormMain::OnPropertyGridChange( wxPropertyGridEvent& event )
     else
     if ( name == wxT("Margin Colour") )
     {
-        wxColourPropertyValue cpv;
-        cpv << value;
+        wxColourPropertyValue cpv = wxANY_AS(value, wxColourPropertyValue);
         m_pPropGridManager->GetGrid()->SetMarginColour( cpv.m_colour );
     }
     else if ( name == wxT("Cell Colour") )
     {
-        wxColourPropertyValue cpv;
-        cpv << value;
+        wxColourPropertyValue cpv = wxANY_AS(value, wxColourPropertyValue);
         m_pPropGridManager->GetGrid()->SetCellBackgroundColour( cpv.m_colour );
     }
     else if ( name == wxT("Line Colour") )
     {
-        wxColourPropertyValue cpv;
-        cpv << value;
+        wxColourPropertyValue cpv = wxANY_AS(value, wxColourPropertyValue);
         m_pPropGridManager->GetGrid()->SetLineColour( cpv.m_colour );
     }
     else if ( name == wxT("Cell Text Colour") )
     {
-        wxColourPropertyValue cpv;
-        cpv << value;
+        wxColourPropertyValue cpv = wxANY_AS(value, wxColourPropertyValue);
         m_pPropGridManager->GetGrid()->SetCellTextColour( cpv.m_colour );
     }
 }
@@ -1328,7 +1077,7 @@ void FormMain::PopulateWithStandardItems ()
     // an empty value cell, while help string is shown either in the
     // description text box, as a tool tip, or on the status bar.
     pg->SetPropertyHelpString("Height",
-        "This property uses attributes \"Units\" and \"InlineHelp\"." );
+        "This property uses attributes \"Units\" and \"Hint\"." );
 
     pg->Append( new wxIntProperty(wxT("Width"),wxPG_LABEL,640) );
     pg->SetPropertyAttribute(wxT("Width"), wxPG_ATTR_MIN, (long)10 );
@@ -1336,8 +1085,10 @@ void FormMain::PopulateWithStandardItems ()
     pg->SetPropertyAttribute(wxT("Width"), wxPG_ATTR_UNITS, wxT("Pixels") );
 
     pg->SetPropertyValueUnspecified(wxT("Width"));
-    pg->SetPropertyAttribute(wxT("Width"), wxPG_ATTR_INLINE_HELP, wxT("Enter new width for window") );
-    pg->SetPropertyHelpString(wxT("Width"), wxT("This property uses attributes \"Units\" and \"InlineHelp\".") );
+    pg->SetPropertyAttribute("Width", wxPG_ATTR_HINT,
+                             "Enter new width for window" );
+    pg->SetPropertyHelpString("Width",
+        "This property uses attributes \"Units\" and \"Hint\"." );
 
     pg->Append( new wxIntProperty(wxT("X"),wxPG_LABEL,10) );
     pg->SetPropertyAttribute(wxT("X"), wxPG_ATTR_UNITS, wxT("Pixels") );
@@ -1347,7 +1098,7 @@ void FormMain::PopulateWithStandardItems ()
     pg->SetPropertyAttribute(wxT("Y"), wxPG_ATTR_UNITS, wxT("Pixels") );
     pg->SetPropertyHelpString(wxT("Y"), wxT("This property uses \"Units\" attribute.") );
 
-    const wxChar* disabledHelpString = wxT("This property is simply disabled. Inorder to have label disabled as well, ")
+    const wxChar* disabledHelpString = wxT("This property is simply disabled. In order to have label disabled as well, ")
                                        wxT("you need to set wxPG_EX_GREY_LABEL_WHEN_DISABLED using SetExtraStyle.");
 
     pg->Append( new wxPropertyCategory(wxT("Environment"),wxPG_LABEL) );
@@ -1381,12 +1132,6 @@ void FormMain::PopulateWithStandardItems ()
         wxT("with custom action (dir dialog popup) defined.")
         );
 
-    pg->Append( new wxAdvImageFileProperty(wxT("AdvImageFileProperty"),wxPG_LABEL) );
-    pg->SetPropertyHelpString( wxT("AdvImageFileProperty"),
-        wxT("This demonstrates wxAdvImageFileProperty class defined in this sample app. ")
-        wxT("Button can be used to add new images to the popup list.")
-        );
-
     wxArrayDouble arrdbl;
     arrdbl.Add(-1.0);
     arrdbl.Add(-0.5);
@@ -1471,9 +1216,10 @@ void FormMain::PopulateWithExamples ()
     pg->SetPropertyHelpString( wxT("BoolProperty with CheckBox"),
         wxT("Property attribute wxPG_BOOL_USE_CHECKBOX has been set to true.") );
 
-     pid = pg->Append( new wxFloatProperty( wxT("FloatProperty"),
-                                       wxPG_LABEL,
-                                       1234500.23 ) );
+    prop = pg->Append( new wxFloatProperty("FloatProperty",
+                                           wxPG_LABEL,
+                                           1234500.23) );
+    prop->SetAttribute("Min", -100.12);
 
     // A string property that can be edited in a separate editor dialog.
     pg->Append( new wxLongStringProperty( wxT("LongStringProperty"), wxT("LongStringProp"),
@@ -1513,13 +1259,19 @@ void FormMain::PopulateWithExamples ()
 #endif
 
     pid = pg->Append( new wxColourProperty(wxT("ColourProperty"),wxPG_LABEL,*wxRED) );
-    //pg->SetPropertyAttribute(pid,wxPG_COLOUR_ALLOW_CUSTOM,false);
     pg->SetPropertyEditor( wxT("ColourProperty"), wxPGEditor_ComboBox );
-    pg->GetProperty(wxT("ColourProperty"))->SetFlag(wxPG_PROP_AUTO_UNSPECIFIED);
+    pg->GetProperty(wxT("ColourProperty"))->SetAutoUnspecified(true);
     pg->SetPropertyHelpString( wxT("ColourProperty"),
         wxT("wxPropertyGrid::SetPropertyEditor method has been used to change ")
         wxT("editor of this property to wxPGEditor_ComboBox)"));
 
+    pid = pg->Append( new wxColourProperty("ColourPropertyWithAlpha",
+                                           wxPG_LABEL,
+                                           wxColour(15, 200, 95, 128)) );
+    pg->SetPropertyAttribute("ColourPropertyWithAlpha", "HasAlpha", true);
+    pg->SetPropertyHelpString("ColourPropertyWithAlpha",
+        "Attribute \"HasAlpha\" is set to true for this property.");
+
     //
     // This demonstrates using alternative editor for colour property
     // to trigger colour dialog directly from button.
@@ -1645,7 +1397,7 @@ void FormMain::PopulateWithExamples ()
     mdc.DrawLine(0, 0, 60, 15);
     mdc.SelectObject(wxNullBitmap);
     pg->SetPropertyImage( wxT("StringPropertyWithBitmap"), myTestBitmap );
+
 
     // this value array would be optional if values matched string indexes
     //long flags_prop_values[] = { wxICONIZE, wxCAPTION, wxMINIMIZE_BOX, wxMAXIMIZE_BOX };
@@ -1841,6 +1593,15 @@ void FormMain::PopulateWithLibraryConfig ()
     wxPropertyGridManager* pgman = m_pPropGridManager;
     wxPropertyGridPage* pg = pgman->GetPage(wxT("wxWidgets Library Config"));
 
+    // Set custom column proportions (here in the sample app we need
+    // to check if the grid has wxPG_SPLITTER_AUTO_CENTER style. You usually
+    // need not to do it in your application).
+    if ( pgman->HasFlag(wxPG_SPLITTER_AUTO_CENTER) )
+    {
+        pg->SetColumnProportion(0, 3);
+        pg->SetColumnProportion(1, 1);
+    }
+
     wxPGProperty* cat;
 
     wxBitmap bmp = wxArtProvider::GetBitmap(wxART_REPORT_VIEW);
@@ -1909,7 +1670,6 @@ void FormMain::PopulateWithLibraryConfig ()
     ADD_WX_LIB_CONF_GROUP(wxT("Unicode Support"))
     ADD_WX_LIB_CONF( wxUSE_UNICODE )
     ADD_WX_LIB_CONF( wxUSE_UNICODE_MSLU )
-    ADD_WX_LIB_CONF( wxUSE_WCHAR_T )
 
     ADD_WX_LIB_CONF_GROUP(wxT("Global Features"))
     ADD_WX_LIB_CONF( wxUSE_EXCEPTIONS )
@@ -2172,7 +1932,9 @@ void FormMain::CreateGrid( int style, int extraStyle )
 
     pgman->SetExtraStyle(extraStyle);
 
-    m_pPropGridManager->SetValidationFailureBehavior( wxPG_VFB_BEEP | wxPG_VFB_MARK_CELL | wxPG_VFB_SHOW_MESSAGE );
+    // This is the default validation failure behaviour
+    m_pPropGridManager->SetValidationFailureBehavior( wxPG_VFB_MARK_CELL |
+                                                      wxPG_VFB_SHOW_MESSAGEBOX );
 
     m_pPropGridManager->GetGrid()->SetVerticalSpacing( 2 );
 
@@ -2281,13 +2043,20 @@ FormMain::FormMain(const wxString& title, const wxPoint& pos, const wxSize& size
     m_itemEnable = menuTools1->Append(ID_ENABLE, wxT("Enable"),
         wxT("Toggles item's enabled state.") );
     m_itemEnable->Enable( FALSE );
-    menuTools1->Append(ID_HIDE, wxT("Hide"), wxT("Shows or hides a property") );
+    menuTools1->Append(ID_HIDE, "Hide", "Hides a property" );
+    menuTools1->Append(ID_SETREADONLY, "Set as Read-Only",
+                       "Set property as read-only" );
 
     menuTools2->Append(ID_ITERATE1, wxT("Iterate Over Properties") );
     menuTools2->Append(ID_ITERATE2, wxT("Iterate Over Visible Items") );
     menuTools2->Append(ID_ITERATE3, wxT("Reverse Iterate Over Properties") );
     menuTools2->Append(ID_ITERATE4, wxT("Iterate Over Categories") );
     menuTools2->AppendSeparator();
+    menuTools2->Append(ID_ONEXTENDEDKEYNAV, "Extend Keyboard Navigation",
+                       "This will set Enter to navigate to next property, "
+                       "and allows arrow keys to navigate even when in "
+                       "editor control.");
+    menuTools2->AppendSeparator();
     menuTools2->Append(ID_SETPROPERTYVALUE, wxT("Set Property Value") );
     menuTools2->Append(ID_CLEARMODIF, wxT("Clear Modified Status"), wxT("Clears wxPG_MODIFIED flag from all properties.") );
     menuTools2->AppendSeparator();
@@ -2664,6 +2433,25 @@ void FormMain::OnIterate4Click( wxCommandEvent& WXUNUSED(event) )
 
 // -----------------------------------------------------------------------
 
+void FormMain::OnExtendedKeyNav( wxCommandEvent& WXUNUSED(event) )
+{
+    // Use AddActionTrigger() and DedicateKey() to set up Enter,
+    // Up, and Down keys for navigating between properties.
+    wxPropertyGrid* propGrid = m_pPropGridManager->GetGrid();
+
+    propGrid->AddActionTrigger(wxPG_ACTION_NEXT_PROPERTY,
+                               WXK_RETURN);
+    propGrid->DedicateKey(WXK_RETURN);
+
+    // Up and Down keys are alredy associated with navigation,
+    // but we must also prevent them from being eaten by
+    // editor controls.
+    propGrid->DedicateKey(WXK_UP);
+    propGrid->DedicateKey(WXK_DOWN);
+}
+
+// -----------------------------------------------------------------------
+
 void FormMain::OnFitColumnsClick( wxCommandEvent& WXUNUSED(event) )
 {
     wxPropertyGridPage* page = m_pPropGridManager->GetCurrentPage();
@@ -2729,36 +2517,29 @@ void FormMain::OnEnableDisable( wxCommandEvent& )
 
 // -----------------------------------------------------------------------
 
-void FormMain::OnHideShow( wxCommandEvent& WXUNUSED(event) )
+void FormMain::OnSetReadOnly( wxCommandEvent& WXUNUSED(event) )
 {
-    wxPGProperty* id = m_pPropGridManager->GetGrid()->GetSelection();
-    if ( !id )
+    wxPGProperty* p = m_pPropGridManager->GetGrid()->GetSelection();
+    if ( !p )
     {
         wxMessageBox(wxT("First select a property."));
         return;
     }
+    m_pPropGridManager->SetPropertyReadOnly(p);
+}
 
-    if ( m_pPropGridManager->IsPropertyShown( id ) )
-    {
-        m_pPropGridManager->HideProperty( id, true );
-        m_itemEnable->SetItemLabel( wxT("Show") );
-    }
-    else
-    {
-        m_pPropGridManager->HideProperty( id, false );
-        m_itemEnable->SetItemLabel( wxT("Hide") );
-    }
-
-    wxPropertyGridPage* curPage = m_pPropGridManager->GetCurrentPage();
-
-    // Check for bottomY precalculation validity
-    unsigned int byPre = curPage->GetVirtualHeight();
-    unsigned int byAct = curPage->GetActualVirtualHeight();
+// -----------------------------------------------------------------------
 
-    if ( byPre != byAct )
+void FormMain::OnHide( wxCommandEvent& WXUNUSED(event) )
+{
+    wxPGProperty* id = m_pPropGridManager->GetGrid()->GetSelection();
+    if ( !id )
     {
-        wxLogDebug(wxT("VirtualHeight is %u, should be %u"), byPre, byAct);
+        wxMessageBox(wxT("First select a property."));
+        return;
     }
+
+    m_pPropGridManager->HideProperty( id, true );
 }
 
 // -----------------------------------------------------------------------
@@ -3020,8 +2801,8 @@ void FormMain::OnCatColours( wxCommandEvent& event )
 
 void FormMain::OnSelectStyle( wxCommandEvent& WXUNUSED(event) )
 {
-    int style;
-    int extraStyle;
+    int style = 0;
+    int extraStyle = 0;
 
     {
         wxArrayString chs;