]> git.saurik.com Git - wxWidgets.git/blobdiff - src/propgrid/propgrid.cpp
Add missing WXK constants for the control keys
[wxWidgets.git] / src / propgrid / propgrid.cpp
index c727d2f3da3f722bf32d3ffe95ae3b513b6b5041..87380ff30de8ca14a8c92b9234481f356603d8d4 100644 (file)
@@ -6,7 +6,7 @@
 // Created:     2004-09-25
 // RCS-ID:      $Id$
 // Copyright:   (c) Jaakko Salli
-// Licence:     wxWindows license
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // For compilers that support precompilation, includes "wx/wx.h".
@@ -63,6 +63,7 @@
 
 #include "wx/timer.h"
 #include "wx/dcbuffer.h"
+#include "wx/scopeguard.h"
 
 // Two pics for the expand / collapse buttons.
 // Files are not supplied with this project (since it is
@@ -234,6 +235,10 @@ wxPGGlobalVarsClass::~wxPGGlobalVarsClass()
         delete ((wxPGEditor*)vt_it->second);
     }
 
+    // Make sure the global pointers have been reset
+    wxASSERT(wxPG_EDITOR(TextCtrl) == NULL);
+    wxASSERT(wxPG_EDITOR(ChoiceAndButton) == NULL);
+
     delete wxPGProperty::sm_wxPG_LABEL;
 }
 
@@ -245,9 +250,9 @@ void wxPropertyGridInitGlobalsIfNeeded()
 // wxPropertyGrid
 // -----------------------------------------------------------------------
 
-IMPLEMENT_DYNAMIC_CLASS(wxPropertyGrid, wxScrolledWindow)
+IMPLEMENT_DYNAMIC_CLASS(wxPropertyGrid, wxControl)
 
-BEGIN_EVENT_TABLE(wxPropertyGrid, wxScrolledWindow)
+BEGIN_EVENT_TABLE(wxPropertyGrid, wxControl)
   EVT_IDLE(wxPropertyGrid::OnIdle)
   EVT_PAINT(wxPropertyGrid::OnPaint)
   EVT_SIZE(wxPropertyGrid::OnResize)
@@ -270,7 +275,7 @@ END_EVENT_TABLE()
 // -----------------------------------------------------------------------
 
 wxPropertyGrid::wxPropertyGrid()
-    : wxScrolledWindow()
+    : wxControl(), wxScrollHelper(this)
 {
     Init1();
 }
@@ -283,7 +288,7 @@ wxPropertyGrid::wxPropertyGrid( wxWindow *parent,
                                 const wxSize& size,
                                 long style,
                                 const wxString& name )
-    : wxScrolledWindow()
+    : wxControl(), wxScrollHelper(this)
 {
     Init1();
     Create(parent,id,pos,size,style,name);
@@ -310,7 +315,10 @@ bool wxPropertyGrid::Create( wxWindow *parent,
     style &= ~(wxTAB_TRAVERSAL);
     style |= wxWANTS_CHARS;
 
-    wxScrolledWindow::Create(parent,id,pos,size,style,name);
+    wxControl::Create(parent, id, pos, size,
+                      style | wxScrolledWindowStyle,
+                      wxDefaultValidator,
+                      name);
 
     Init2();
 
@@ -340,10 +348,12 @@ void wxPropertyGrid::Init1()
     m_eventObject = this;
     m_curFocused = NULL;
     m_processedEvent = NULL;
+    m_tlp = NULL;
     m_sortFunction = NULL;
-    m_inDoPropertyChanged = 0;
-    m_inCommitChangesFromEditor = 0;
-    m_inDoSelectProperty = 0;
+    m_inDoPropertyChanged = false;
+    m_inCommitChangesFromEditor = false;
+    m_inDoSelectProperty = false;
+    m_inOnValidationFailure = false;
     m_permanentValidationFailureBehavior = wxPG_VFB_DEFAULT;
     m_dragStatus = 0;
     m_mouseSide = 16;
@@ -366,9 +376,7 @@ void wxPropertyGrid::Init1()
     m_coloursCustomized = 0;
     m_frozen = 0;
 
-#if wxPG_DOUBLE_BUFFER
     m_doubleBuffer = NULL;
-#endif
 
 #ifndef wxPG_ICON_WIDTH
     m_expandbmp = NULL;
@@ -458,7 +466,6 @@ void wxPropertyGrid::Init2()
     SetBackgroundStyle( wxBG_STYLE_CUSTOM );
 
     // Hook the top-level parent
-    m_tlp = NULL;
     m_tlpClosed = NULL;
     m_tlpClosedTime = 0;
 
@@ -468,10 +475,6 @@ void wxPropertyGrid::Init2()
 
     m_timeCreated = ::wxGetLocalTimeMillis();
 
-    //m_canvas->Create(this, wxID_ANY, wxPoint(0, 0), GetClientSize(),
-    //                 wxWANTS_CHARS | wxCLIP_CHILDREN);
-    SetBackgroundStyle( wxBG_STYLE_CUSTOM );
-
     m_iFlags |= wxPG_FL_INITIALIZED;
 
     m_ncWidth = wndsize.GetWidth();
@@ -539,10 +542,8 @@ wxPropertyGrid::~wxPropertyGrid()
                       wxS("Close(false).)") );
     }
 
-#if wxPG_DOUBLE_BUFFER
     if ( m_doubleBuffer )
         delete m_doubleBuffer;
-#endif
 
     if ( m_iFlags & wxPG_FL_CREATEDSTATE )
         delete m_pState;
@@ -570,7 +571,7 @@ bool wxPropertyGrid::Destroy()
     if ( m_iFlags & wxPG_FL_MOUSE_CAPTURED )
         ReleaseMouse();
 
-    return wxScrolledWindow::Destroy();
+    return wxControl::Destroy();
 }
 
 // -----------------------------------------------------------------------
@@ -629,12 +630,12 @@ void wxPropertyGrid::SetWindowStyleFlag( long style )
             //
             // Tooltips disabled
             //
-            wxScrolledWindow::SetToolTip( NULL );
+            SetToolTip( NULL );
         }
     #endif
     }
 
-    wxScrolledWindow::SetWindowStyleFlag ( style );
+    wxControl::SetWindowStyleFlag ( style );
 
     if ( m_iFlags & wxPG_FL_INITIALIZED )
     {
@@ -652,7 +653,7 @@ void wxPropertyGrid::Freeze()
 {
     if ( !m_frozen )
     {
-        wxScrolledWindow::Freeze();
+        wxControl::Freeze();
     }
     m_frozen++;
 }
@@ -665,11 +666,9 @@ void wxPropertyGrid::Thaw()
 
     if ( !m_frozen )
     {
-        wxScrolledWindow::Thaw();
+        wxControl::Thaw();
         RecalculateVirtualSize();
-    #if wxPG_REFRESH_CONTROLS_AFTER_REPAINT
         Refresh();
-    #endif
 
         // Force property re-selection
         // NB: We must copy the selection.
@@ -1122,13 +1121,11 @@ void wxPropertyGrid::SetExtraStyle( long exStyle )
         }
         else
         {
-        #if wxPG_DOUBLE_BUFFER
             wxDELETE(m_doubleBuffer);
-        #endif
         }
     }
 
-    wxScrolledWindow::SetExtraStyle( exStyle );
+    wxControl::SetExtraStyle( exStyle );
 
     if ( exStyle & wxPG_EX_INIT_NOCAT )
         m_pState->InitNonCatMode();
@@ -1234,7 +1231,7 @@ bool wxPropertyGrid::Reparent( wxWindowBase *newParent )
 {
     OnTLPChanging((wxWindow*)newParent);
 
-    bool res = wxScrolledWindow::Reparent(newParent);
+    bool res = wxControl::Reparent(newParent);
 
     return res;
 }
@@ -1247,7 +1244,7 @@ void wxPropertyGrid::CalculateFontAndBitmapStuff( int vspacing )
 {
     int x = 0, y = 0;
 
-    m_captionFont = wxScrolledWindow::GetFont();
+    m_captionFont = wxControl::GetFont();
 
     GetTextExtent(wxS("jG"), &x, &y, 0, 0, &m_captionFont);
     m_subgroup_extramargin = x + (x/2);
@@ -1442,7 +1439,7 @@ bool wxPropertyGrid::SetFont( const wxFont& font )
     // Must disable active editor.
     DoClearSelection();
 
-    bool res = wxScrolledWindow::SetFont( font );
+    bool res = wxControl::SetFont( font );
     if ( res && GetParent()) // may not have been Create()ed yet if SetFont called from SetWindowVariant
     {
         CalculateFontAndBitmapStuff( m_vspacing );
@@ -1683,7 +1680,7 @@ wxPoint wxPropertyGrid::GetGoodEditorDialogPosition( wxPGProperty* p,
 
 wxString& wxPropertyGrid::ExpandEscapeSequences( wxString& dst_str, wxString& src_str )
 {
-    if ( src_str.length() == 0 )
+    if ( src_str.empty() )
     {
         dst_str = src_str;
         return src_str;
@@ -1742,7 +1739,7 @@ wxString& wxPropertyGrid::ExpandEscapeSequences( wxString& dst_str, wxString& sr
 
 wxString& wxPropertyGrid::CreateEscapeSequences( wxString& dst_str, wxString& src_str )
 {
-    if ( src_str.length() == 0 )
+    if ( src_str.empty() )
     {
         dst_str = src_str;
         return src_str;
@@ -1828,6 +1825,9 @@ void wxPropertyGrid::OnPaint( wxPaintEvent& WXUNUSED(event) )
     r.x = 0;
     r.width = GetClientSize().x;
 
+    r.y = vy;
+    r.height = GetClientSize().y;
+
     // Repaint this rectangle
     DrawItems( dc, r.y, r.y + r.height, &r );
 
@@ -1917,7 +1917,7 @@ void wxPropertyGrid::DrawExpanderButton( wxDC& dc, const wxRect& rect,
 void wxPropertyGrid::DrawItems( wxDC& dc,
                                 unsigned int topItemY,
                                 unsigned int bottomItemY,
-                                const wxRect* drawRect )
+                                const wxRect* itemsRect )
 {
     if ( m_frozen ||
          m_height < 1 ||
@@ -1927,15 +1927,26 @@ void wxPropertyGrid::DrawItems( wxDC& dc,
 
     m_pState->EnsureVirtualHeight();
 
-    wxRect tempDrawRect;
-    if ( !drawRect )
+    wxRect tempItemsRect;
+    if ( !itemsRect )
     {
-        tempDrawRect = wxRect(0, topItemY,
-                              m_pState->m_width,
-                              bottomItemY);
-        drawRect = &tempDrawRect;
+        tempItemsRect = wxRect(0, topItemY,
+                               m_pState->m_width,
+                               bottomItemY);
+        itemsRect = &tempItemsRect;
     }
 
+    int vx, vy;
+    GetViewStart(&vx, &vy);
+    vx *= wxPG_PIXELS_PER_UNIT;
+    vy *= wxPG_PIXELS_PER_UNIT;
+
+    // itemRect is in virtual grid space
+    wxRect drawRect(itemsRect->x - vx,
+                    itemsRect->y - vy,
+                    itemsRect->width,
+                    itemsRect->height);
+
     // items added check
     if ( m_pState->m_itemsAdded ) PrepareAfterItemsAdded();
 
@@ -1946,14 +1957,13 @@ void wxPropertyGrid::DrawItems( wxDC& dc,
         wxDC* dcPtr = &dc;
         bool isBuffered = false;
 
-    #if wxPG_DOUBLE_BUFFER
         wxMemoryDC* bufferDC = NULL;
 
         if ( !(GetExtraStyle() & wxPG_EX_NATIVE_DOUBLE_BUFFERING) )
         {
             if ( !m_doubleBuffer )
             {
-                paintFinishY = drawRect->y;
+                paintFinishY = itemsRect->y;
                 dcPtr = NULL;
             }
             else
@@ -1967,13 +1977,12 @@ void wxPropertyGrid::DrawItems( wxDC& dc,
                 isBuffered = true;
             }
         }
-    #endif
 
         if ( dcPtr )
         {
-            dc.SetClippingRegion( *drawRect );
-            paintFinishY = DoDrawItems( *dcPtr, drawRect, isBuffered );
-            int drawBottomY = drawRect->y + drawRect->height;
+            // paintFinishY and drawBottomY are in buffer/physical space
+            paintFinishY = DoDrawItems( *dcPtr, itemsRect, isBuffered );
+            int drawBottomY = itemsRect->y + itemsRect->height - vy;
 
             // Clear area beyond last painted property
             if ( paintFinishY < drawBottomY )
@@ -1984,48 +1993,44 @@ void wxPropertyGrid::DrawItems( wxDC& dc,
                                      m_width,
                                      drawBottomY );
             }
-
-            dc.DestroyClippingRegion();
         }
 
-    #if wxPG_DOUBLE_BUFFER
         if ( bufferDC )
         {
-            dc.Blit( drawRect->x, drawRect->y, drawRect->width,
-                     drawRect->height,
+            dc.Blit( drawRect.x, drawRect.y, drawRect.width,
+                     drawRect.height,
                      bufferDC, 0, 0, wxCOPY );
             delete bufferDC;
         }
-    #endif
     }
     else
     {
         // Just clear the area
         dc.SetPen(m_colEmptySpace);
         dc.SetBrush(m_colEmptySpace);
-        dc.DrawRectangle(*drawRect);
+        dc.DrawRectangle(drawRect);
     }
 }
 
 // -----------------------------------------------------------------------
 
 int wxPropertyGrid::DoDrawItems( wxDC& dc,
-                                 const wxRect* drawRect,
+                                 const wxRect* itemsRect,
                                  bool isBuffered ) const
 {
     const wxPGProperty* firstItem;
     const wxPGProperty* lastItem;
 
-    firstItem = DoGetItemAtY(drawRect->y);
-    lastItem = DoGetItemAtY(drawRect->y+drawRect->height-1);
+    firstItem = DoGetItemAtY(itemsRect->y);
+    lastItem = DoGetItemAtY(itemsRect->y+itemsRect->height-1);
 
     if ( !lastItem )
         lastItem = GetLastItem( wxPG_ITERATE_VISIBLE );
 
     if ( m_frozen || m_height < 1 || firstItem == NULL )
-        return drawRect->y;
+        return itemsRect->y;
 
-    wxCHECK_MSG( !m_pState->m_itemsAdded, drawRect->y,
+    wxCHECK_MSG( !m_pState->m_itemsAdded, itemsRect->y,
                  "no items added" );
     wxASSERT( m_pState->m_properties->GetChildCount() );
 
@@ -2034,8 +2039,8 @@ int wxPropertyGrid::DoDrawItems( wxDC& dc,
     int firstItemTopY;
     int lastItemBottomY;
 
-    firstItemTopY = drawRect->y;
-    lastItemBottomY = drawRect->y + drawRect->height;
+    firstItemTopY = itemsRect->y;
+    lastItemBottomY = itemsRect->y + itemsRect->height;
 
     // Align y coordinates to item boundaries
     firstItemTopY -= firstItemTopY % lh;
@@ -2045,20 +2050,20 @@ int wxPropertyGrid::DoDrawItems( wxDC& dc,
     // Entire range outside scrolled, visible area?
     if ( firstItemTopY >= (int)m_pState->GetVirtualHeight() ||
          lastItemBottomY <= 0 )
-        return drawRect->y;
+        return itemsRect->y;
 
     wxCHECK_MSG( firstItemTopY < lastItemBottomY,
-                 drawRect->y,
+                 itemsRect->y,
                  "invalid y values" );
 
     /*
     wxLogDebug("  -> DoDrawItems ( \"%s\" -> \"%s\"
-               "height=%i (ch=%i), drawRect = 0x%lX )",
+               "height=%i (ch=%i), itemsRect = 0x%lX )",
         firstItem->GetLabel().c_str(),
         lastItem->GetLabel().c_str(),
         (int)(lastItemBottomY - firstItemTopY),
         (int)m_height,
-        (unsigned long)drawRect );
+        (unsigned long)&itemsRect );
     */
 
     wxRect r;
@@ -2068,31 +2073,29 @@ int wxPropertyGrid::DoDrawItems( wxDC& dc,
     int xRelMod = 0;
 
     //
-    // With wxPG_DOUBLE_BUFFER, do double buffering
-    // - buffer's y = 0, so align drawRect and coordinates to that
+    // For now, do some manual calculation for double buffering
+    // - buffer's y = 0, so align itemsRect and coordinates to that
+    //
+    // TODO: In future use wxAutoBufferedPaintDC (for example)
     //
-#if wxPG_DOUBLE_BUFFER
     int yRelMod = 0;
 
     wxRect cr2;
 
     if ( isBuffered )
     {
-        xRelMod = drawRect->x;
-        yRelMod = drawRect->y;
+        xRelMod = itemsRect->x;
+        yRelMod = itemsRect->y;
 
         //
-        // drawRect conversion
-        cr2 = *drawRect;
+        // itemsRect conversion
+        cr2 = *itemsRect;
         cr2.x -= xRelMod;
         cr2.y -= yRelMod;
-        drawRect = &cr2;
+        itemsRect = &cr2;
         firstItemTopY -= yRelMod;
         lastItemBottomY -= yRelMod;
     }
-#else
-    wxUnusedVar(isBuffered);
-#endif
 
     int x = m_marginWidth - xRelMod;
 
@@ -2134,10 +2137,6 @@ int wxPropertyGrid::DoDrawItems( wxDC& dc,
     const wxPropertyGridPageState* state = m_pState;
     const wxArrayInt& colWidths = state->m_colWidths;
 
-#if wxPG_REFRESH_CONTROLS_AFTER_REPAINT
-    bool wasSelectedPainted = false;
-#endif
-
     // TODO: Only render columns that are within clipping region.
 
     dc.SetFont(normalFont);
@@ -2265,11 +2264,6 @@ int wxPropertyGrid::DoDrawItems( wxDC& dc,
         }
         else
         {
-#if wxPG_REFRESH_CONTROLS_AFTER_REPAINT
-            if ( p == firstSelected )
-                wasSelectedPainted = true;
-#endif
-
             renderFlags |= wxPGCellRenderer::Selected;
 
             if ( !p->IsCategory() )
@@ -2506,18 +2500,6 @@ int wxPropertyGrid::DoDrawItems( wxDC& dc,
         y += rowHeight;
     }
 
-    // Refresh editor controls (seems not needed on msw)
-    // NOTE: This code is mandatory for GTK!
-#if wxPG_REFRESH_CONTROLS_AFTER_REPAINT
-    if ( wasSelectedPainted )
-    {
-        if ( m_wndEditor )
-            m_wndEditor->Refresh();
-        if ( m_wndEditor2 )
-            m_wndEditor2->Refresh();
-    }
-#endif
-
     return y;
 }
 
@@ -2537,7 +2519,7 @@ wxRect wxPropertyGrid::GetPropertyRect( const wxPGProperty* p1, const wxPGProper
     //
     // Return rect which encloses the given property range
     // (in logical grid coordinates)
-    // 
+    //
 
     int visTop = p1->GetY();
     int visBottom;
@@ -2595,7 +2577,7 @@ void wxPropertyGrid::DrawItems( const wxPGProperty* p1, const wxPGProperty* p2 )
 
 void wxPropertyGrid::RefreshProperty( wxPGProperty* p )
 {
-    if ( m_pState->DoIsPropertySelected(p) )
+    if ( m_pState->DoIsPropertySelected(p) || p->IsChildSelected(true) )
     {
         // NB: We must copy the selection.
         wxArrayPGProperty selection = m_pState->m_selection;
@@ -2657,7 +2639,7 @@ void wxPropertyGrid::Refresh( bool WXUNUSED(eraseBackground),
 
     wxWindow::Refresh(false, rect);
 
-#if wxPG_REFRESH_CONTROLS_AFTER_REPAINT
+#if wxPG_REFRESH_CONTROLS
     // I think this really helps only GTK+1.2
     if ( m_wndEditor ) m_wndEditor->Refresh();
     if ( m_wndEditor2 ) m_wndEditor2->Refresh();
@@ -2908,7 +2890,7 @@ bool wxPropertyGrid::CommitChangesFromEditor( wxUint32 flags )
          (m_iFlags & wxPG_FL_INITIALIZED) &&
          selected )
     {
-        m_inCommitChangesFromEditor = 1;
+        m_inCommitChangesFromEditor = true;
 
         wxVariant variant(selected->GetValueRef());
         bool valueIsPending = false;
@@ -2943,9 +2925,9 @@ bool wxPropertyGrid::CommitChangesFromEditor( wxUint32 flags )
             EditorsValueWasNotModified();
         }
 
-        bool res = true;
+        m_inCommitChangesFromEditor = false;
 
-        m_inCommitChangesFromEditor = 0;
+        bool res = true;
 
         if ( validationFailure && !forceSuccess )
         {
@@ -3076,7 +3058,7 @@ bool wxPropertyGrid::PerformValidation( wxPGProperty* p, wxVariant& pendingValue
             if ( changedProperty == GetSelection() )
             {
                 wxWindow* editor = GetEditorControl();
-                wxASSERT( editor->IsKindOf(CLASSINFO(wxTextCtrl)) );
+                wxASSERT( wxDynamicCast(editor, wxTextCtrl) );
                 evtChangingValue = wxStaticCast(editor, wxTextCtrl)->GetValue();
             }
             else
@@ -3131,7 +3113,7 @@ bool wxPropertyGrid::PerformValidation( wxPGProperty* p, wxVariant& pendingValue
 wxStatusBar* wxPropertyGrid::GetStatusBar()
 {
     wxWindow* topWnd = ::wxGetTopLevelParent(this);
-    if ( topWnd && topWnd->IsKindOf(CLASSINFO(wxFrame)) )
+    if ( wxDynamicCast(topWnd, wxFrame) )
     {
         wxFrame* pFrame = wxStaticCast(topWnd, wxFrame);
         if ( pFrame )
@@ -3145,7 +3127,7 @@ wxStatusBar* wxPropertyGrid::GetStatusBar()
 
 void wxPropertyGrid::DoShowPropertyError( wxPGProperty* WXUNUSED(property), const wxString& msg )
 {
-    if ( !msg.length() )
+    if ( msg.empty() )
         return;
 
 #if wxUSE_STATUSBAR
@@ -3160,7 +3142,7 @@ void wxPropertyGrid::DoShowPropertyError( wxPGProperty* WXUNUSED(property), cons
     }
 #endif
 
-    ::wxMessageBox(msg, wxT("Property Error"));
+    ::wxMessageBox(msg, _("Property Error"));
 }
 
 // -----------------------------------------------------------------------
@@ -3185,7 +3167,27 @@ void wxPropertyGrid::DoHidePropertyError( wxPGProperty* WXUNUSED(property) )
 bool wxPropertyGrid::OnValidationFailure( wxPGProperty* property,
                                           wxVariant& invalidValue )
 {
+    if ( m_inOnValidationFailure )
+        return true;
+
+    m_inOnValidationFailure = true;
+    wxON_BLOCK_EXIT_SET(m_inOnValidationFailure, false);
+
     wxWindow* editor = GetEditorControl();
+    int vfb = m_validationInfo.m_failureBehavior;
+
+    if ( m_inDoSelectProperty )
+    {
+        // When property selection is being changed, do not display any
+        // messages, if some were already shown for this property.
+        if ( property->HasFlag(wxPG_PROP_INVALID_VALUE) )
+        {
+            m_validationInfo.m_failureBehavior =
+                vfb & ~(wxPG_VFB_SHOW_MESSAGE |
+                        wxPG_VFB_SHOW_MESSAGEBOX |
+                        wxPG_VFB_SHOW_MESSAGE_ON_STATUSBAR);
+        }
+    }
 
     // First call property's handler
     property->OnValidationFailure(invalidValue);
@@ -3194,7 +3196,7 @@ bool wxPropertyGrid::OnValidationFailure( wxPGProperty* property,
 
     //
     // For non-wxTextCtrl editors, we do need to revert the value
-    if ( !editor->IsKindOf(CLASSINFO(wxTextCtrl)) &&
+    if ( !wxDynamicCast(editor, wxTextCtrl) &&
          property == GetSelection() )
     {
         property->GetEditorClass()->UpdateControl(property, editor);
@@ -3247,14 +3249,32 @@ bool wxPropertyGrid::DoOnValidationFailure( wxPGProperty* property, wxVariant& W
         }
     }
 
-    if ( vfb & wxPG_VFB_SHOW_MESSAGE )
+    if ( vfb & (wxPG_VFB_SHOW_MESSAGE |
+                wxPG_VFB_SHOW_MESSAGEBOX |
+                wxPG_VFB_SHOW_MESSAGE_ON_STATUSBAR) )
     {
         wxString msg = m_validationInfo.m_failureMessage;
 
-        if ( !msg.length() )
-            msg = wxT("You have entered invalid value. Press ESC to cancel editing.");
+        if ( msg.empty() )
+            msg = _("You have entered invalid value. Press ESC to cancel editing.");
+
+    #if wxUSE_STATUSBAR
+        if ( vfb & wxPG_VFB_SHOW_MESSAGE_ON_STATUSBAR )
+        {
+            if ( !wxPGGlobalVars->m_offline )
+            {
+                wxStatusBar* pStatusBar = GetStatusBar();
+                if ( pStatusBar )
+                    pStatusBar->SetStatusText(msg);
+            }
+        }
+    #endif
+
+        if ( vfb & wxPG_VFB_SHOW_MESSAGE )
+            DoShowPropertyError(property, msg);
 
-        DoShowPropertyError(property, msg);
+        if ( vfb & wxPG_VFB_SHOW_MESSAGEBOX )
+            ::wxMessageBox(msg, _("Property Error"));
     }
 
     return (vfb & wxPG_VFB_STAY_IN_PROPERTY) ? false : true;
@@ -3284,6 +3304,18 @@ void wxPropertyGrid::DoOnValidationFailureReset( wxPGProperty* property )
         }
     }
 
+#if wxUSE_STATUSBAR
+    if ( vfb & wxPG_VFB_SHOW_MESSAGE_ON_STATUSBAR )
+    {
+        if ( !wxPGGlobalVars->m_offline )
+        {
+            wxStatusBar* pStatusBar = GetStatusBar();
+            if ( pStatusBar )
+                pStatusBar->SetStatusText(wxEmptyString);
+        }
+    }
+#endif
+
     if ( vfb & wxPG_VFB_SHOW_MESSAGE )
     {
         DoHidePropertyError(property);
@@ -3300,12 +3332,13 @@ bool wxPropertyGrid::DoPropertyChanged( wxPGProperty* p, unsigned int selFlags )
     if ( m_inDoPropertyChanged )
         return true;
 
+    m_inDoPropertyChanged = true;
+    wxON_BLOCK_EXIT_SET(m_inDoPropertyChanged, false);
+
     wxPGProperty* selected = GetSelection();
 
     m_pState->m_anyModified = 1;
 
-    m_inDoPropertyChanged = 1;
-
     // If property's value is being changed, assume it is valid
     OnValidationFailureReset(selected);
 
@@ -3373,7 +3406,7 @@ bool wxPropertyGrid::DoPropertyChanged( wxPGProperty* p, unsigned int selFlags )
     }
     else
     {
-#if wxPG_REFRESH_CONTROLS_AFTER_REPAINT
+#if wxPG_REFRESH_CONTROLS
         if ( m_wndEditor ) m_wndEditor->Refresh();
         if ( m_wndEditor2 ) m_wndEditor2->Refresh();
 #endif
@@ -3397,8 +3430,6 @@ bool wxPropertyGrid::DoPropertyChanged( wxPGProperty* p, unsigned int selFlags )
 
     SendEvent( wxEVT_PG_CHANGED, changedProperty, NULL );
 
-    m_inDoPropertyChanged = 0;
-
     return true;
 }
 
@@ -3476,13 +3507,19 @@ bool wxPropertyGrid::DoEditorValidate()
 
 // -----------------------------------------------------------------------
 
-void wxPropertyGrid::HandleCustomEditorEvent( wxEvent &event )
+bool wxPropertyGrid::HandleCustomEditorEvent( wxEvent &event )
 {
+    //
+    // NB: We should return true if the event was recognized as
+    //     a dedicated wxPropertyGrid event, and as such was
+    //     either properly handled or ignored.
+    //
+
     // It is possible that this handler receives event even before
     // the control has been properly initialized. Let's skip the
     // event handling in that case.
     if ( !m_pState )
-        return;
+        return false;
 
     // Don't care about the event if it originated from the
     // 'label editor'. In this function we only care about the
@@ -3490,7 +3527,7 @@ void wxPropertyGrid::HandleCustomEditorEvent( wxEvent &event )
     if ( m_labelEditor && event.GetId() == m_labelEditor->GetId() )
     {
         event.Skip();
-        return;
+        return true;
     }
 
     wxPGProperty* selected = GetSelection();
@@ -3499,14 +3536,15 @@ void wxPropertyGrid::HandleCustomEditorEvent( wxEvent &event )
     // Possibly, but very rare.
     if ( !selected ||
           selected->HasFlag(wxPG_PROP_BEING_DELETED) ||
+          m_inOnValidationFailure ||
           // Also don't handle editor event if wxEVT_PG_CHANGED or
           // similar is currently doing something (showing a
           // message box, for instance).
           m_processedEvent )
-        return;
+        return true;
 
     if ( m_iFlags & wxPG_FL_IN_HANDLECUSTOMEDITOREVENT )
-        return;
+        return true;
 
     wxVariant pendingValue(selected->GetValueRef());
     wxWindow* wnd = GetEditorControl();
@@ -3524,22 +3562,28 @@ void wxPropertyGrid::HandleCustomEditorEvent( wxEvent &event )
     // Filter out excess wxTextCtrl modified events
     if ( event.GetEventType() == wxEVT_COMMAND_TEXT_UPDATED && wnd )
     {
-        if ( wnd->IsKindOf(CLASSINFO(wxTextCtrl)) )
+        if ( wxDynamicCast(wnd, wxTextCtrl) )
         {
             wxTextCtrl* tc = (wxTextCtrl*) wnd;
 
             wxString newTcValue = tc->GetValue();
             if ( m_prevTcValue == newTcValue )
-                return;
+                return true;
             m_prevTcValue = newTcValue;
         }
-        else if ( wnd->IsKindOf(CLASSINFO(wxComboCtrl)) )
+        else if ( wxDynamicCast(wnd, wxComboCtrl) )
         {
+            // In some cases we might stumble unintentionally on
+            // wxComboCtrl's embedded wxTextCtrl's events. Let's
+            // avoid them.
+            if ( wxDynamicCast(editorWnd, wxTextCtrl) )
+                return false;
+
             wxComboCtrl* cc = (wxComboCtrl*) wnd;
 
             wxString newTcValue = cc->GetTextCtrl()->GetValue();
             if ( m_prevTcValue == newTcValue )
-                return;
+                return true;
             m_prevTcValue = newTcValue;
         }
     }
@@ -3548,6 +3592,7 @@ void wxPropertyGrid::HandleCustomEditorEvent( wxEvent &event )
 
     bool validationFailure = false;
     bool buttonWasHandled = false;
+    bool result = false;
 
     //
     // Try common button handling
@@ -3575,6 +3620,8 @@ void wxPropertyGrid::HandleCustomEditorEvent( wxEvent &event )
 
             if ( editor->OnEvent( this, selected, editorWnd, event ) )
             {
+                result = true;
+
                 // If changes, validate them
                 if ( DoEditorValidate() )
                 {
@@ -3648,12 +3695,15 @@ void wxPropertyGrid::HandleCustomEditorEvent( wxEvent &event )
         // Let unhandled button click events go to the parent
         if ( !buttonWasHandled && event.GetEventType() == wxEVT_COMMAND_BUTTON_CLICKED )
         {
+            result = true;
             wxCommandEvent evt(wxEVT_COMMAND_BUTTON_CLICKED,GetId());
             GetEventHandler()->AddPendingEvent(evt);
         }
     }
 
     ClearInternalFlag(wxPG_FL_IN_HANDLECUSTOMEDITOREVENT);
+
+    return result;
 }
 
 // -----------------------------------------------------------------------
@@ -3829,6 +3879,14 @@ private:
 
         m_propGrid->HandleCustomEditorEvent(event);
 
+        //
+        // NB: We should return true if the event was recognized as
+        //     a dedicated wxPropertyGrid event, and as such was
+        //     either properly handled or ignored.
+        //
+        if ( m_propGrid->IsMainButtonEvent(event) )
+            return true;
+
         //
         // NB: On wxMSW, a wxTextCtrl with wxTE_PROCESS_ENTER
         //     may beep annoyingly if that event is skipped
@@ -3895,20 +3953,7 @@ void wxPropertyGrid::FreeEditors()
     // Return focus back to canvas from children (this is required at least for
     // GTK+, which, unlike Windows, clears focus when control is destroyed
     // instead of moving it to closest parent).
-    wxWindow* focus = wxWindow::FindFocus();
-    if ( focus )
-    {
-        wxWindow* parent = focus->GetParent();
-        while ( parent )
-        {
-            if ( parent == this )
-            {
-                SetFocusOnCanvas();
-                break;
-            }
-            parent = parent->GetParent();
-        }
-    }
+    SetFocusOnCanvas();
 
     // Do not free editors immediately if processing events
     if ( m_wndEditor2 )
@@ -3948,13 +3993,11 @@ bool wxPropertyGrid::DoSelectProperty( wxPGProperty* p, unsigned int flags )
     if ( m_inDoSelectProperty )
         return true;
 
-    m_inDoSelectProperty = 1;
+    m_inDoSelectProperty = true;
+    wxON_BLOCK_EXIT_SET(m_inDoSelectProperty, false);
 
     if ( !m_pState )
-    {
-        m_inDoSelectProperty = 0;
         return false;
-    }
 
     wxArrayPGProperty prevSelection = m_pState->m_selection;
     wxPGProperty* prevFirstSel;
@@ -3982,6 +4025,8 @@ bool wxPropertyGrid::DoSelectProperty( wxPGProperty* p, unsigned int flags )
         wxPrintf( "P = NULL\n" );
 */
 
+    wxWindow* primaryCtrl = NULL;
+
     // If we are frozen, then just set the values.
     if ( m_frozen )
     {
@@ -4020,7 +4065,6 @@ bool wxPropertyGrid::DoSelectProperty( wxPGProperty* p, unsigned int flags )
                 }
             }
 
-            m_inDoSelectProperty = 0;
             return true;
         }
 
@@ -4028,8 +4072,6 @@ bool wxPropertyGrid::DoSelectProperty( wxPGProperty* p, unsigned int flags )
         // First, deactivate previous
         if ( prevFirstSel )
         {
-            OnValidationFailureReset(prevFirstSel);
-
             // Must double-check if this is an selected in case of forceswitch
             if ( p != prevFirstSel )
             {
@@ -4038,11 +4080,15 @@ bool wxPropertyGrid::DoSelectProperty( wxPGProperty* p, unsigned int flags )
                     // Validation has failed, so we can't exit the previous editor
                     //::wxMessageBox(_("Please correct the value or press ESC to cancel the edit."),
                     //               _("Invalid Value"),wxOK|wxICON_ERROR);
-                    m_inDoSelectProperty = 0;
                     return false;
                 }
             }
 
+            // This should be called after CommitChangesFromEditor(), so that
+            // OnValidationFailure() still has information on property's
+            // validation state.
+            OnValidationFailureReset(prevFirstSel);
+
             FreeEditors();
 
             m_iFlags &= ~(wxPG_FL_ABNORMAL_EDITOR);
@@ -4106,7 +4152,7 @@ bool wxPropertyGrid::DoSelectProperty( wxPGProperty* p, unsigned int flags )
 
                 m_wndEditor = wndList.m_primary;
                 m_wndEditor2 = wndList.m_secondary;
-                wxWindow* primaryCtrl = GetEditorControl();
+                primaryCtrl = GetEditorControl();
 
                 //
                 // Essentially, primaryCtrl == m_wndEditor
@@ -4234,34 +4280,30 @@ bool wxPropertyGrid::DoSelectProperty( wxPGProperty* p, unsigned int flags )
         ClearInternalFlag(wxPG_FL_IN_SELECT_PROPERTY);
     }
 
-#if wxUSE_STATUSBAR
+    const wxString* pHelpString = NULL;
 
-    //
-    // Show help text in status bar.
-    //   (if found and grid not embedded in manager with help box and
-    //    style wxPG_EX_HELP_AS_TOOLTIPS is not used).
-    //
+    if ( p )
+        pHelpString = &p->GetHelpString();
 
     if ( !(GetExtraStyle() & wxPG_EX_HELP_AS_TOOLTIPS) )
     {
+#if wxUSE_STATUSBAR
+
+        //
+        // Show help text in status bar.
+        //   (if found and grid not embedded in manager with help box and
+        //    style wxPG_EX_HELP_AS_TOOLTIPS is not used).
+        //
         wxStatusBar* statusbar = GetStatusBar();
         if ( statusbar )
         {
-            const wxString* pHelpString = (const wxString*) NULL;
-
-            if ( p )
+            if ( pHelpString && !pHelpString->empty() )
             {
-                pHelpString = &p->GetHelpString();
-                if ( pHelpString->length() )
-                {
-                    // Set help box text.
-                    statusbar->SetStatusText( *pHelpString );
-                    m_iFlags |= wxPG_FL_STRING_IN_STATUSBAR;
-                }
+                // Set help box text.
+                statusbar->SetStatusText( *pHelpString );
+                m_iFlags |= wxPG_FL_STRING_IN_STATUSBAR;
             }
-
-            if ( (!pHelpString || !pHelpString->length()) &&
-                 (m_iFlags & wxPG_FL_STRING_IN_STATUSBAR) )
+            else if ( m_iFlags & wxPG_FL_STRING_IN_STATUSBAR )
             {
                 // Clear help box - but only if it was written
                 // by us at previous time.
@@ -4269,10 +4311,21 @@ bool wxPropertyGrid::DoSelectProperty( wxPGProperty* p, unsigned int flags )
                 m_iFlags &= ~(wxPG_FL_STRING_IN_STATUSBAR);
             }
         }
+#endif
     }
+    else
+    {
+#if wxPG_SUPPORT_TOOLTIPS
+        //
+        // Show help as a tool tip on the editor control.
+        //
+        if ( pHelpString && !pHelpString->empty() &&
+             primaryCtrl )
+        {
+            primaryCtrl->SetToolTip(*pHelpString);
+        }
 #endif
-
-    m_inDoSelectProperty = 0;
+    }
 
     // call wx event handler (here so that it also occurs on deselection)
     if ( !(flags & wxPG_SEL_DONT_SEND_EVENT) )
@@ -4493,6 +4546,11 @@ void wxPropertyGrid::RecalculateVirtualSize( int forceXPos )
     SetScrollbars( wxPG_PIXELS_PER_UNIT, wxPG_PIXELS_PER_UNIT,
                    xAmount, yAmount, xPos, yPos, true );
 
+    // This may be needed in addition to calling SetScrollbars()
+    // when class inherits from wxScrollHelper instead of
+    // actual wxScrolled<T>.
+    AdjustScrollbars();
+
     // Must re-get size now
     GetClientSize(&width,&height);
 
@@ -4526,7 +4584,6 @@ void wxPropertyGrid::OnResize( wxSizeEvent& event )
     m_width = width;
     m_height = height;
 
-#if wxPG_DOUBLE_BUFFER
     if ( !(GetExtraStyle() & wxPG_EX_NATIVE_DOUBLE_BUFFERING) )
     {
         int dblh = (m_lineHeight*2);
@@ -4554,8 +4611,6 @@ void wxPropertyGrid::OnResize( wxSizeEvent& event )
         }
     }
 
-#endif
-
     m_pState->OnClientWidthChange( width, event.GetSize().x - m_ncWidth, true );
     m_ncWidth = event.GetSize().x;
 
@@ -4591,7 +4646,24 @@ void wxPropertyGrid::SetVirtualWidth( int width )
 
 void wxPropertyGrid::SetFocusOnCanvas()
 {
-    SetFocusIgnoringChildren();
+    // To prevent wxPropertyGrid from stealing focus from other controls,
+    // only move focus to the grid if it was already in one if its child
+    // controls.
+    wxWindow* focus = wxWindow::FindFocus();
+    if ( focus )
+    {
+        wxWindow* parent = focus->GetParent();
+        while ( parent )
+        {
+            if ( parent == this )
+            {
+                SetFocus();
+                break;
+            }
+            parent = parent->GetParent();
+        }
+    }
+
     m_editorFocused = 0;
 }
 
@@ -4723,7 +4795,10 @@ bool wxPropertyGrid::HandleMouseClick( int x, unsigned int y, wxMouseEvent &even
                         else DoExpand( p, true );
                     }
 
-                res = false;
+                // Do not Skip() the event after selection has been made.
+                // Otherwise default event handling behaviour kicks in
+                // and may revert focus back to the main canvas.
+                res = true;
             }
             else
             {
@@ -4778,7 +4853,7 @@ bool wxPropertyGrid::HandleMouseClick( int x, unsigned int y, wxMouseEvent &even
                             m_draggedSplitter = splitterHit;
                             m_dragOffset = splitterHitOffset;
 
-                        #if wxPG_REFRESH_CONTROLS_AFTER_REPAINT
+                        #if wxPG_REFRESH_CONTROLS
                             // Fixes button disappearance bug
                             if ( m_wndEditor2 )
                                 m_wndEditor2->Show ( false );
@@ -4862,28 +4937,6 @@ bool wxPropertyGrid::HandleMouseDoubleClick( int WXUNUSED(x),
 
 // -----------------------------------------------------------------------
 
-#if wxPG_SUPPORT_TOOLTIPS
-
-void wxPropertyGrid::SetToolTip( const wxString& tipString )
-{
-    if ( tipString.length() )
-    {
-        wxScrolledWindow::SetToolTip(tipString);
-    }
-    else
-    {
-    #if wxPG_ALLOW_EMPTY_TOOLTIPS
-        wxScrolledWindow::SetToolTip( m_emptyString );
-    #else
-        wxScrolledWindow::SetToolTip( NULL );
-    #endif
-    }
-}
-
-#endif // #if wxPG_SUPPORT_TOOLTIPS
-
-// -----------------------------------------------------------------------
-
 // Return false if should be skipped
 bool wxPropertyGrid::HandleMouseMove( int x, unsigned int y,
                                       wxMouseEvent &event )
@@ -4973,8 +5026,6 @@ bool wxPropertyGrid::HandleMouseMove( int x, unsigned int y,
         //
         if ( m_windowStyle & wxPG_TOOLTIPS )
         {
-            wxToolTip* tooltip = GetToolTip();
-
             if ( m_propHover != prevHover || prevSide != m_mouseSide )
             {
                 if ( m_propHover && !m_propHover->IsCategory() )
@@ -5014,34 +5065,18 @@ bool wxPropertyGrid::HandleMouseMove( int x, unsigned int y,
                             int tw, th;
                             GetTextExtent( tipString, &tw, &th, 0, 0 );
                             if ( tw > space )
-                            {
                                 SetToolTip( tipString );
-                            }
                         }
                         else
                         {
-                            if ( tooltip )
-                            {
-                            #if wxPG_ALLOW_EMPTY_TOOLTIPS
-                                SetToolTip( m_emptyString );
-                            #else
-                                wxScrolledWindow::SetToolTip( NULL );
-                            #endif
-                            }
+                            SetToolTip( m_emptyString );
                         }
 
                     }
                 }
                 else
                 {
-                    if ( tooltip )
-                    {
-                    #if wxPG_ALLOW_EMPTY_TOOLTIPS
-                        SetToolTip( m_emptyString );
-                    #else
-                        wxScrolledWindow::SetToolTip( NULL );
-                    #endif
-                    }
+                    SetToolTip( m_emptyString );
                 }
             }
         }
@@ -5130,7 +5165,7 @@ bool wxPropertyGrid::HandleMouseUp( int x, unsigned int WXUNUSED(y),
     int splitterHitOffset;
     state->HitTestH( x, &splitterHit, &splitterHitOffset );
 
-    // No event type check - basicly calling this method should
+    // No event type check - basically calling this method should
     // just stop dragging.
     // Left up after dragged?
     if ( m_dragStatus >= 1 )
@@ -5151,7 +5186,7 @@ bool wxPropertyGrid::HandleMouseUp( int x, unsigned int WXUNUSED(y),
         // Disable splitter auto-centering (but only if moved any -
         // otherwise we end up disabling auto-center even after a
         // recentering double-click).
-        int posDiff = abs(m_startingSplitterX - 
+        int posDiff = abs(m_startingSplitterX -
                           GetSplitterPosition(m_draggedSplitter));
 
         if ( posDiff > 1 )
@@ -5183,7 +5218,7 @@ bool wxPropertyGrid::HandleMouseUp( int x, unsigned int WXUNUSED(y),
             m_wndEditor->Show ( true );
         }
 
-    #if wxPG_REFRESH_CONTROLS_AFTER_REPAINT
+    #if wxPG_REFRESH_CONTROLS
         // Fixes button disappearance bug
         if ( m_wndEditor2 )
             m_wndEditor2->Show ( true );
@@ -5209,7 +5244,7 @@ bool wxPropertyGrid::OnMouseCommon( wxMouseEvent& event, int* px, int* py )
 
     // Hide popup on clicks
     if ( event.GetEventType() != wxEVT_MOTION )
-        if ( wnd && wnd->IsKindOf(CLASSINFO(wxOwnerDrawnComboBox)) )
+        if ( wxDynamicCast(wnd, wxOwnerDrawnComboBox) )
         {
             ((wxOwnerDrawnComboBox*)wnd)->HidePopup();
         }
@@ -5244,9 +5279,13 @@ void wxPropertyGrid::OnMouseClick( wxMouseEvent &event )
     int x, y;
     if ( OnMouseCommon( event, &x, &y ) )
     {
-        HandleMouseClick(x,y,event);
+        if ( !HandleMouseClick(x, y, event) )
+            event.Skip();
+    }
+    else
+    {
+        event.Skip();
     }
-    event.Skip();
 }
 
 // -----------------------------------------------------------------------
@@ -5269,7 +5308,9 @@ void wxPropertyGrid::OnMouseDoubleClick( wxMouseEvent &event )
     int x, y;
     CalcUnscrolledPosition( event.m_x, event.m_y, &x, &y );
     HandleMouseDoubleClick(x,y,event);
-    event.Skip();
+
+    // Do not Skip() event here - OnMouseClick() call above
+    // should have already taken care of it.
 }
 
 // -----------------------------------------------------------------------
@@ -5291,9 +5332,13 @@ void wxPropertyGrid::OnMouseUp( wxMouseEvent &event )
     int x, y;
     if ( OnMouseCommon( event, &x, &y ) )
     {
-        HandleMouseUp(x,y,event);
+        if ( !HandleMouseUp(x, y, event) )
+            event.Skip();
+    }
+    else
+    {
+        event.Skip();
     }
-    event.Skip();
 }
 
 // -----------------------------------------------------------------------
@@ -5508,12 +5553,14 @@ void wxPropertyGrid::HandleKeyEvent( wxKeyEvent &event, bool fromChild )
 
     if ( keycode == WXK_TAB )
     {
+#if defined(__WXGTK__)
         wxWindow* mainControl;
 
         if ( HasInternalFlag(wxPG_FL_IN_MANAGER) )
             mainControl = GetParent();
         else
             mainControl = this;
+#endif
 
         if ( !event.ShiftDown() )
         {
@@ -5614,6 +5661,12 @@ void wxPropertyGrid::HandleKeyEvent( wxKeyEvent &event, bool fromChild )
 
         wxPGProperty* p = selected;
 
+        if ( action == wxPG_ACTION_EDIT && !editorFocused )
+        {
+            DoSelectProperty( p, wxPG_SEL_FOCUS );
+            wasHandled = true;
+        }
+
         // Travel and expand/collapse
         int selectDir = -2;
 
@@ -5795,6 +5848,13 @@ bool wxPropertyGrid::IsEditorFocused() const
 // Called by focus event handlers. newFocused is the window that becomes focused.
 void wxPropertyGrid::HandleFocusChange( wxWindow* newFocused )
 {
+    //
+    // Never allow focus to be changed when handling editor event.
+    // Especially because they may be displaing a dialog which
+    // could cause all kinds of weird (native) focus changes.
+    if ( HasInternalFlag(wxPG_FL_IN_HANDLECUSTOMEDITOREVENT) )
+        return;
+
     unsigned int oldFlags = m_iFlags;
     bool wasEditorFocused = false;
     wxWindow* wndEditor = m_wndEditor;
@@ -5934,7 +5994,7 @@ wxPGEditor* wxPropertyGrid::DoRegisterEditorClass( wxPGEditor* editorClass,
         RegisterDefaultEditors();
 
     wxString name = editorName;
-    if ( name.length() == 0 )
+    if ( name.empty() )
         name = editorClass->GetName();
 
     // Existing editor under this name?
@@ -6146,6 +6206,7 @@ void wxPropertyGridEvent::Init()
     m_column = 1;
     m_canVeto = false;
     m_wasVetoed = false;
+    m_pg = NULL;
 }
 
 // -----------------------------------------------------------------------
@@ -6283,7 +6344,7 @@ wxPGProperty* wxPropertyGridPopulator::Add( const wxString& propClass,
         return NULL;
     }
 
-    if ( !classInfo || !classInfo->IsKindOf(CLASSINFO(wxPGProperty)) )
+    if ( !classInfo || !classInfo->IsKindOf(wxCLASSINFO(wxPGProperty)) )
     {
         ProcessError(wxString::Format(wxT("'%s' is not valid property class"),propClass.c_str()));
         return NULL;
@@ -6335,7 +6396,7 @@ wxPGChoices wxPropertyGridPopulator::ParseChoices( const wxString& choicesString
     else
     {
         bool found = false;
-        if ( idString.length() )
+        if ( !idString.empty() )
         {
             wxPGHashMapS2P::iterator it = m_dictIdChoices.find(idString);
             if ( it != m_dictIdChoices.end() )
@@ -6411,7 +6472,7 @@ wxPGChoices wxPropertyGridPopulator::ParseChoices( const wxString& choicesString
             }
 
             // Assign to id
-            if ( idString.length() )
+            if ( !idString.empty() )
                 m_dictIdChoices[idString] = choices.GetData();
         }
     }
@@ -6452,7 +6513,7 @@ bool wxPropertyGridPopulator::AddAttribute( const wxString& name,
     wxString valuel = value.Lower();
     wxVariant variant;
 
-    if ( type.length() == 0 )
+    if ( type.empty() )
     {
         long v;