X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ea5af9c5356676a5c4d81b4d4915ad32ca3c9c6e..6cab4fcac7fe26d9ae5a1d29066e0893d689bb38:/src/propgrid/propgridpagestate.cpp

diff --git a/src/propgrid/propgridpagestate.cpp b/src/propgrid/propgridpagestate.cpp
index fb9c1c8d7e..59c3a88a39 100644
--- a/src/propgrid/propgridpagestate.cpp
+++ b/src/propgrid/propgridpagestate.cpp
@@ -38,9 +38,9 @@
 // This define is necessary to prevent macro clearing
 #define __wxPG_SOURCE_FILE__
 
-#include <wx/propgrid/propgridpagestate.h>
-#include <wx/propgrid/propgrid.h>
-#include <wx/propgrid/editors.h>
+#include "wx/propgrid/propgridpagestate.h"
+#include "wx/propgrid/propgrid.h"
+#include "wx/propgrid/editors.h"
 
 #define wxPG_DEFAULT_SPLITTERX      110
 
@@ -74,11 +74,10 @@ void wxPropertyGridIteratorBase::Init( wxPropertyGridPageState* state, int flags
 
 void wxPropertyGridIteratorBase::Init( wxPropertyGridPageState* state, int flags, int startPos, int dir  )
 {
-    wxPGProperty* property;
+    wxPGProperty* property = NULL;
 
     if ( startPos == wxTOP )
     {
-        property = NULL;
         if ( dir == 0 )
             dir = 1;
     }
@@ -90,8 +89,7 @@ void wxPropertyGridIteratorBase::Init( wxPropertyGridPageState* state, int flags
     }
     else
     {
-        wxASSERT_MSG( false, wxT("Only supported stating positions are wxTOP and wxBOTTOM") );
-        property = NULL;
+        wxFAIL_MSG("Only supported starting positions are wxTOP and wxBOTTOM");
     }
 
     Init( state, flags, property, dir );
@@ -203,12 +201,12 @@ void wxPropertyGridIteratorBase::Next( bool iterateChildren )
 
 wxPropertyGridPageState::wxPropertyGridPageState()
 {
-    m_pPropGrid = (wxPropertyGrid*) NULL;
+    m_pPropGrid = NULL;
     m_regularArray.SetParentState(this);
     m_properties = &m_regularArray;
-    m_abcArray = (wxPGRootProperty*) NULL;
-    m_currentCategory = (wxPropertyCategory*) NULL;
-    m_selected = (wxPGProperty*) NULL;
+    m_abcArray = NULL;
+    m_currentCategory = NULL;
+    m_selected = NULL;
     m_width = 0;
     m_virtualHeight = 0;
     m_lastCaptionBottomnest = 1;
@@ -233,7 +231,7 @@ void wxPropertyGridPageState::InitNonCatMode()
 {
     if ( !m_abcArray )
     {
-        m_abcArray = new wxPGRootProperty();
+        m_abcArray = new wxPGRootProperty(wxS("<Root_NonCat>"));
         m_abcArray->SetParentState(this);
         m_abcArray->SetFlag(wxPG_PROP_CHILDREN_ARE_COPIES);
     }
@@ -247,17 +245,17 @@ void wxPropertyGridPageState::InitNonCatMode()
 
     if ( m_properties->GetChildCount() )
     {
-        // Copy items.
-        wxPropertyGridIterator it( this, wxPG_ITERATE_DEFAULT|wxPG_ITERATE_CATEGORIES );
+        //
+        // Prepare m_abcArray
+        wxPropertyGridIterator it( this, wxPG_ITERATE_PROPERTIES );
 
         for ( ; !it.AtEnd(); it.Next() )
         {
             wxPGProperty* p = it.GetProperty();
             wxPGProperty* parent = p->GetParent();
-            if ( p->HasFlag(wxPG_PROP_MISC_PARENT) &&
-                ( parent == m_properties || (parent->IsCategory() || parent->IsRoot()) ) )
+            if ( parent->IsCategory() || parent->IsRoot() )
             {
-                m_abcArray->AddChild2( p );
+                m_abcArray->AddChild2(p);
                 p->m_parent = &m_regularArray;
             }
         }
@@ -276,14 +274,14 @@ void wxPropertyGridPageState::DoClear()
 
     m_dictName.clear();
 
-    m_currentCategory = (wxPropertyCategory*) NULL;
+    m_currentCategory = NULL;
     m_lastCaptionBottomnest = 1;
     m_itemsAdded = 0;
 
     m_virtualHeight = 0;
     m_vhCalcPending = 0;
 
-    m_selected = (wxPGProperty*) NULL;
+    m_selected = NULL;
 }
 
 // -----------------------------------------------------------------------
@@ -371,7 +369,7 @@ void wxPropertyGridPageState::OnClientWidthChange( int newWidth, int widthChange
 wxPGProperty* wxPropertyGridPageState::GetLastItem( int flags )
 {
     if ( !m_properties->GetChildCount() )
-        return (wxPGProperty*) NULL;
+        return NULL;
 
     wxPG_ITERATOR_CREATE_MASKS(flags, int itemExMask, int parentExMask)
 
@@ -405,7 +403,7 @@ wxPropertyCategory* wxPropertyGridPageState::GetPropertyCategory( const wxPGProp
             return (wxPropertyCategory*)parent;
     } while ( grandparent );
 
-    return (wxPropertyCategory*) NULL;
+    return NULL;
 }
 
 // -----------------------------------------------------------------------
@@ -445,7 +443,7 @@ wxPGProperty* wxPropertyGridPageState::BaseGetPropertyByName( const wxString& na
     it = m_dictName.find(name);
     if ( it != m_dictName.end() )
         return (wxPGProperty*) it->second;
-    return (wxPGProperty*) NULL;
+    return NULL;
 }
 
 // -----------------------------------------------------------------------
@@ -455,8 +453,15 @@ void wxPropertyGridPageState::DoSetPropertyName( wxPGProperty* p,
 {
     wxCHECK_RET( p, wxT("invalid property id") );
 
-    if ( p->GetBaseName().Len() ) m_dictName.erase( p->GetBaseName() );
-    if ( newName.Len() ) m_dictName[newName] = (void*) p;
+    wxPGProperty* parent = p->GetParent();
+
+    if ( parent->IsCategory() || parent->IsRoot() )
+    {
+        if ( p->GetBaseName().length() )
+            m_dictName.erase( p->GetBaseName() );
+        if ( newName.length() )
+            m_dictName[newName] = (void*) p;
+    }
 
     p->DoSetName(newName);
 }
@@ -470,7 +475,7 @@ void wxPropertyGridPageState::DoSetPropertyName( wxPGProperty* p,
 //   NB: Nowadays only needed for alphabetic/categoric mode switching.
 // -----------------------------------------------------------------------
 
-#define II_INVALID_I    0x00FFFFFF
+//#define II_INVALID_I    0x00FFFFFF
 
 #define ITEM_ITERATION_VARIABLES \
     wxPGProperty* parent; \
@@ -481,14 +486,16 @@ void wxPropertyGridPageState::DoSetPropertyName( wxPGProperty* p,
     parent = m_properties; \
     i = 0;
 
+#if 0
 #define ITEM_ITERATION_INIT(startparent, startindex, state) \
     parent = startparent; \
     i = (unsigned int)startindex; \
-    if ( parent == (wxPGProperty*) NULL ) \
+    if ( parent == NULL ) \
     { \
         parent = state->m_properties; \
         i = 0; \
     }
+#endif
 
 #define ITEM_ITERATION_LOOP_BEGIN \
     do \
@@ -595,64 +602,106 @@ bool wxPropertyGridPageState::EnableCategories( bool enable )
 #if wxUSE_STL
 #include <algorithm>
 
-static bool wxPG_SortFunc(wxPGProperty *p1, wxPGProperty *p2)
+static bool wxPG_SortFunc_ByFunction(wxPGProperty *p1, wxPGProperty *p2)
+{
+    wxPropertyGrid* pg = p1->GetGrid();
+    wxPGSortCallback sortFunction = pg->GetSortFunction();
+    return sortFunction(pg, p1, p2) < 0;
+}
+
+static bool wxPG_SortFunc_ByLabel(wxPGProperty *p1, wxPGProperty *p2)
 {
-    return p1->GetLabel() < p2->GetLabel();
+    return p1->GetLabel().CmpNoCase( p2->GetLabel() ) < 0;
 }
 
 #else
 
-static int wxPG_SortFunc(wxPGProperty **p1, wxPGProperty **p2)
+static int wxPG_SortFunc_ByFunction(wxPGProperty **pp1, wxPGProperty **pp2)
+{
+    wxPGProperty *p1 = *pp1;
+    wxPGProperty *p2 = *pp2;
+    wxPropertyGrid* pg = p1->GetGrid();
+    wxPGSortCallback sortFunction = pg->GetSortFunction();
+    return sortFunction(pg, p1, p2);
+}
+
+static int wxPG_SortFunc_ByLabel(wxPGProperty **pp1, wxPGProperty **pp2)
 {
-    wxPGProperty *pp1 = *p1;
-    wxPGProperty *pp2 = *p2;
-    return pp1->GetLabel().compare( pp2->GetLabel() );
+    wxPGProperty *p1 = *pp1;
+    wxPGProperty *p2 = *pp2;
+    return p1->GetLabel().CmpNoCase( p2->GetLabel() );
 }
 
 #endif
 
-void wxPropertyGridPageState::SortChildren( wxPGProperty* p )
+void wxPropertyGridPageState::DoSortChildren( wxPGProperty* p,
+                                              int flags )
 {
     if ( !p )
-        p = (wxPGProperty*)m_properties;
+        p = m_properties;
 
+    // Can only sort items with children
     if ( !p->GetChildCount() )
         return;
 
-    wxPGProperty* pwc = (wxPGProperty*)p;
+    // Never sort children of aggregate properties
+    if ( p->HasFlag(wxPG_PROP_AGGREGATE) )
+        return;
 
-    // Can only sort items with children
-    if ( pwc->GetChildCount() < 1 )
+    if ( (flags & wxPG_SORT_TOP_LEVEL_ONLY)
+         && !p->IsCategory() && !p->IsRoot() )
         return;
 
 #if wxUSE_STL
-    std::sort(pwc->m_children.begin(), pwc->m_children.end(), wxPG_SortFunc);
+    if ( GetGrid()->GetSortFunction() )
+        std::sort(p->m_children.begin(), p->m_children.end(),
+                  wxPG_SortFunc_ByFunction);
+    else
+        std::sort(p->m_children.begin(), p->m_children.end(),
+                  wxPG_SortFunc_ByLabel);
 #else
-    pwc->m_children.Sort( wxPG_SortFunc );
+    if ( GetGrid()->GetSortFunction() )
+        p->m_children.Sort( wxPG_SortFunc_ByFunction );
+    else
+        p->m_children.Sort( wxPG_SortFunc_ByLabel );
 #endif
 
-    // Fix indexes
-    pwc->FixIndexesOfChildren();
+    // Fix indices
+    p->FixIndicesOfChildren();
 
+    if ( flags & wxPG_RECURSE )
+    {
+        // Apply sort recursively
+        for ( unsigned int i=0; i<p->GetChildCount(); i++ )
+            DoSortChildren(p->Item(i), flags);
+    }
 }
 
 // -----------------------------------------------------------------------
 
-void wxPropertyGridPageState::Sort()
+void wxPropertyGridPageState::DoSort( int flags )
 {
-    SortChildren( m_properties );
+    DoSortChildren( m_properties, flags | wxPG_RECURSE );
 
-    // Sort categories as well
-    if ( !IsInNonCatMode() )
-    {
-        size_t i;
-        for ( i=0;i<m_properties->GetChildCount();i++)
-        {
-            wxPGProperty* p = m_properties->Item(i);
-            if ( p->IsCategory() )
-                SortChildren( p );
-        }
-    }
+    // We used to sort categories as well here also if in non-categorized
+    // mode, but doing would naturally cause child indices to become
+    // corrupted.
+}
+
+// -----------------------------------------------------------------------
+
+bool wxPropertyGridPageState::PrepareAfterItemsAdded()
+{
+    if ( !m_itemsAdded ) return false;
+
+    wxPropertyGrid* pg = GetGrid();
+
+    m_itemsAdded = 0;
+
+    if ( pg->HasFlag(wxPG_AUTO_SORT) )
+        DoSort(wxPG_SORT_TOP_LEVEL_ONLY);
+
+    return true;
 }
 
 // -----------------------------------------------------------------------
@@ -663,7 +712,7 @@ wxPGProperty* wxPropertyGridPageState::DoGetItemAtY( int y ) const
 {
     // Outside?
     if ( y < 0 )
-        return (wxPGProperty*) NULL;
+        return NULL;
 
     unsigned int a = 0;
     return m_properties->GetItemAtY(y, GetGrid()->m_lineHeight, &a);
@@ -697,7 +746,10 @@ int wxPropertyGridPageState::GetColumnFitWidth(wxClientDC& dc,
         wxPGProperty* p = pwc->Item(i);
         if ( !p->IsCategory() )
         {
-            dc.GetTextExtent( p->GetColumnText(col), &w, &h );
+            const wxPGCell* cell = NULL;
+            wxString text;
+            p->GetDisplayInfo(col, -1, 0, &text, &cell);
+            dc.GetTextExtent(text, &w, &h);
             if ( col == 0 )
                 w += ( ((int)p->m_depth-1) * pg->m_subgroup_extramargin );
 
@@ -892,8 +944,6 @@ void wxPropertyGridPageState::CheckColumnWidths( int widthChange )
     int reduceCol = -1;
     int highestColWidth = 0;
 
-    bool minimizedCols = false;
-
 #ifdef __WXDEBUG__
     if ( debug )
         wxLogDebug(wxT("ColumnWidthCheck (virtualWidth: %i, clientWidth: %i)"), width, clientWidth);
@@ -907,7 +957,6 @@ void wxPropertyGridPageState::CheckColumnWidths( int widthChange )
         if ( m_colWidths[i] <= min )
         {
             m_colWidths[i] = min;
-            minimizedCols = true;
         }
         else
         {
@@ -944,10 +993,10 @@ void wxPropertyGridPageState::CheckColumnWidths( int widthChange )
         if ( colsWidth < width )
         {
             // Increase column
-        #ifdef __WXDEBUG__
-        if ( debug )
-            wxLogDebug(wxT("  Adjust last column to %i"), m_colWidths[lastColumn] + widthHigher);
-        #endif
+#ifdef __WXDEBUG__
+            if ( debug )
+                wxLogDebug(wxT("  Adjust last column to %i"), m_colWidths[lastColumn] + widthHigher);
+#endif
             m_colWidths[lastColumn] = m_colWidths[lastColumn] + widthHigher;
         }
         else if ( colsWidth > width )
@@ -1100,7 +1149,7 @@ bool wxPropertyGridPageState::DoSetPropertyValueString( wxPGProperty* p, const w
 {
     if ( p )
     {
-        int flags = wxPG_REPORT_ERROR|wxPG_FULL_VALUE;
+        int flags = wxPG_REPORT_ERROR|wxPG_FULL_VALUE|wxPG_PROGRAMMATIC_VALUE;
 
         wxVariant variant = p->GetValueRef();
         bool res;
@@ -1114,7 +1163,7 @@ bool wxPropertyGridPageState::DoSetPropertyValueString( wxPGProperty* p, const w
         {
             p->SetValue(variant);
             if ( m_selected==p && this==m_pPropGrid->GetState() )
-                p->UpdateControl(m_pPropGrid->GetEditorControl());
+                m_pPropGrid->RefreshEditor();
         }
 
         return true;
@@ -1130,7 +1179,7 @@ bool wxPropertyGridPageState::DoSetPropertyValue( wxPGProperty* p, wxVariant& va
     {
         p->SetValue(value);
         if ( m_selected==p && this==m_pPropGrid->GetState() )
-            p->UpdateControl(m_pPropGrid->GetEditorControl());
+            m_pPropGrid->RefreshEditor();
 
         return true;
     }
@@ -1151,33 +1200,6 @@ bool wxPropertyGridPageState::DoSetPropertyValueWxObjectPtr( wxPGProperty* p, wx
     return false;
 }
 
-// -----------------------------------------------------------------------
-
-void wxPropertyGridPageState::DoSetPropertyValueUnspecified( wxPGProperty* p )
-{
-    wxCHECK_RET( p, wxT("invalid property id") );
-
-    if ( !p->IsValueUnspecified() )
-    {
-        // Value should be set first - editor class methods may need it
-        p->m_value.MakeNull();
-
-        wxASSERT( m_pPropGrid );
-
-        if ( m_pPropGrid->GetState() == this )
-        {
-            if ( m_pPropGrid->m_selected == p && m_pPropGrid->m_wndEditor )
-            {
-                p->GetEditorClass()->SetValueToUnspecified(p, m_pPropGrid->GetEditorControl());
-            }
-        }
-
-        unsigned int i;
-        for ( i = 0; i < p->GetChildCount(); i++ )
-            DoSetPropertyValueUnspecified( p->Item(i) );
-    }
-}
-
 // -----------------------------------------------------------------------
 // wxPropertyGridPageState property operations
 // -----------------------------------------------------------------------
@@ -1373,7 +1395,7 @@ void wxPropertyGridPageState::DoSetPropertyValues( const wxVariantList& list, wx
 
     //
     // Second pass for special entries
-    for ( node = list.begin(); node != list.end(); node++ )
+    for ( node = list.begin(); node != list.end(); ++node )
     {
         wxVariant *current = (wxVariant*)*node;
 
@@ -1401,7 +1423,7 @@ void wxPropertyGridPageState::DoSetPropertyValues( const wxVariantList& list, wx
                     if ( wxStrcmp(current->GetType(), wxS("list")) == 0 )
                     {
                         DoSetPropertyValues( current->GetList(),
-                                p->IsCategory()?p:((wxPGProperty*)NULL)
+                                p->IsCategory()?p:(NULL)
                             );
                     }
                     else
@@ -1437,7 +1459,7 @@ void wxPropertyGridPageState::DoSetPropertyValues( const wxVariantList& list, wx
 
     if ( numSpecialEntries )
     {
-        for ( node = list.begin(); node != list.end(); node++ )
+        for ( node = list.begin(); node != list.end(); ++node )
         {
             wxVariant *current = (wxVariant*)*node;
 
@@ -1468,7 +1490,7 @@ void wxPropertyGridPageState::DoSetPropertyValues( const wxVariantList& list, wx
                                 wxVariantList& list2 = current->GetList();
                                 wxVariantList::const_iterator node2;
 
-                                for ( node2 = list2.begin(); node2 != list2.end(); node2++ )
+                                for ( node2 = list2.begin(); node2 != list2.end(); ++node2 )
                                 {
                                     wxVariant *attr = (wxVariant*)*node2;
                                     foundProp->SetAttribute( attr->GetName(), *attr );
@@ -1497,9 +1519,7 @@ void wxPropertyGridPageState::DoSetPropertyValues( const wxVariantList& list, wx
         m_pPropGrid->Thaw();
 
         if ( this == m_pPropGrid->GetState() )
-        {
-            m_selected->UpdateControl(m_pPropGrid->GetEditorControl());
-        }
+            m_pPropGrid->RefreshEditor();
     }
 
 }
@@ -1508,14 +1528,14 @@ void wxPropertyGridPageState::DoSetPropertyValues( const wxVariantList& list, wx
 // wxPropertyGridPageState property adding and removal
 // -----------------------------------------------------------------------
 
-int wxPropertyGridPageState::PrepareToAddItem( wxPGProperty* property,
-                                           wxPGProperty* scheduledParent )
+bool wxPropertyGridPageState::PrepareToAddItem( wxPGProperty* property,
+                                                wxPGProperty* scheduledParent )
 {
     wxPropertyGrid* propGrid = m_pPropGrid;
 
     // This will allow better behavior.
     if ( scheduledParent == m_properties )
-        scheduledParent = (wxPGProperty*) NULL;
+        scheduledParent = NULL;
 
     if ( scheduledParent && !scheduledParent->IsCategory() )
     {
@@ -1545,7 +1565,7 @@ int wxPropertyGridPageState::PrepareToAddItem( wxPGProperty* property,
             {
                 delete property;
                 m_currentCategory = pwc;
-                return 2; // Tells the caller what we did.
+                return false;
             }
         }
     }
@@ -1562,123 +1582,29 @@ int wxPropertyGridPageState::PrepareToAddItem( wxPGProperty* property,
 #endif
 
     // Make sure nothing is selected.
-    if ( propGrid && propGrid->m_selected )
-    {
-        bool selRes = propGrid->ClearSelection();
-        wxPG_CHECK_MSG_DBG( selRes,
-                            -1,
-                            wxT("failed to deselect a property (editor probably had invalid value)") );
-    }
+    if ( propGrid )
+        propGrid->ClearSelection(false);
 
-    if ( scheduledParent )
-    {
-        // Use parent's colours.
-        property->m_bgColIndex = scheduledParent->m_bgColIndex;
-        property->m_fgColIndex = scheduledParent->m_fgColIndex;
-
-        // Fix no parent does not yet have parenting flag yet, set one now
-        if ( !scheduledParent->HasFlag(wxPG_PROP_PARENTAL_FLAGS) )
-            scheduledParent->SetParentalType(wxPG_PROP_MISC_PARENT);
-            //scheduledParent->SetFlag(wxPG_PROP_MISC_PARENT);
-    }
+    // NULL parent == root parent
+    if ( !scheduledParent )
+        scheduledParent = DoGetRoot();
 
-    // If in hideable adding mode, or if assigned parent is hideable, then
-    // make this one hideable.
-    if (
-         ( scheduledParent && (scheduledParent->m_flags & wxPG_PROP_HIDDEN) ) ||
-         ( propGrid && (propGrid->m_iFlags & wxPG_FL_ADDING_HIDEABLES) )
-       )
-        property->SetFlag( wxPG_PROP_HIDDEN );
-
-    // Set custom image flag.
-    int custImgHeight = property->OnMeasureImage().y;
-    if ( custImgHeight < 0 /*|| custImgHeight > 1*/ )
-    {
-        property->m_flags |= wxPG_PROP_CUSTOMIMAGE;
-    }
+    property->m_parent = scheduledParent;
 
-    if ( propGrid && (propGrid->GetWindowStyleFlag() & wxPG_LIMITED_EDITING) )
-        property->m_flags |= wxPG_PROP_NOEDITOR;
+    property->InitAfterAdded(this, propGrid);
 
-    if ( !property->IsCategory() )
+    if ( property->IsCategory() )
     {
-        // This is not a category.
-
-        //wxASSERT_MSG( property->GetEditorClass(), wxT("Editor class not initialized!") );
-
-        // Depth.
-        //
-        unsigned char depth = 1;
-        if ( scheduledParent )
-        {
-            depth = scheduledParent->m_depth;
-            if ( !scheduledParent->IsCategory() )
-                depth++;
-        }
-        property->m_depth = depth;
-        unsigned char greyDepth = depth;
-
-        if ( scheduledParent )
-        {
-            wxPropertyCategory* pc;
-
-            if ( scheduledParent->IsCategory() || scheduledParent->IsRoot() )
-                pc = (wxPropertyCategory*)scheduledParent;
-            else
-                // This conditional compile is necessary to
-                // bypass some compiler bug.
-                pc = GetPropertyCategory(scheduledParent);
-
-            if ( pc )
-                greyDepth = pc->GetDepth();
-            else
-                greyDepth = scheduledParent->m_depthBgCol;
-        }
-
-        property->m_depthBgCol = greyDepth;
-
-        // Prepare children pre-added children
-        if ( property->GetChildCount() )
-        {
-            property->SetParentalType(wxPG_PROP_AGGREGATE);
-
-            property->SetExpanded(false); // Properties with children are not expanded by default.
-            if ( propGrid && propGrid->GetWindowStyleFlag() & wxPG_HIDE_MARGIN )
-                property->SetExpanded(true); // ...unless it cannot be expanded.
+        wxPropertyCategory* pc = wxStaticCast(property, wxPropertyCategory);
 
-            property->PrepareSubProperties();
+        m_currentCategory = pc;
 
-            return -1;
-        }
-
-        if ( propGrid && (propGrid->GetExtraStyle() & wxPG_EX_AUTO_UNSPECIFIED_VALUES) )
-            property->SetFlagRecursively(wxPG_PROP_AUTO_UNSPECIFIED, true);
-
-        return 0;
-    }
-    else
-    {
-        // This is a category.
-
-        // depth
-        unsigned char depth = 1;
-        if ( scheduledParent )
-        {
-            depth = scheduledParent->m_depth + 1;
-        }
-        property->m_depth = depth;
-        property->m_depthBgCol = depth;
-
-        m_currentCategory = (wxPropertyCategory*)property;
-
-        wxPropertyCategory* pc = (wxPropertyCategory*)property;
-
-        // Calculate text extent for caption item.
+        // Calculate text extent for category caption
         if ( propGrid )
             pc->CalculateTextExtent(propGrid, propGrid->GetCaptionFont());
-
-        return 1;
     }
+
+    return true;
 }
 
 // -----------------------------------------------------------------------
@@ -1687,7 +1613,7 @@ wxPGProperty* wxPropertyGridPageState::DoAppend( wxPGProperty* property )
 {
     wxPropertyCategory* cur_cat = m_currentCategory;
     if ( property->IsCategory() )
-        cur_cat = (wxPropertyCategory*) NULL;
+        cur_cat = NULL;
 
     return DoInsert( cur_cat, -1, property );
 }
@@ -1703,13 +1629,16 @@ wxPGProperty* wxPropertyGridPageState::DoInsert( wxPGProperty* parent, int index
                  wxNullProperty,
                  wxT("when adding properties to fixed parents, use BeginAddChildren and EndAddChildren.") );
 
-    int parenting = PrepareToAddItem( property, (wxPropertyCategory*)parent );
+    bool res = PrepareToAddItem( property, (wxPropertyCategory*)parent );
 
-    // This type of invalid parenting value indicates we should exit now, returning
-    // id of most recent category.
-    if ( parenting > 1 )
+    // PrepareToAddItem() may just decide to use use current category
+    // instead of adding new one.
+    if ( !res )
         return m_currentCategory;
 
+    bool parentIsRoot = parent->IsRoot();
+    bool parentIsCategory = parent->IsCategory();
+
     // Note that item must be added into current mode later.
 
     // If parent is wxParentProperty, just stick it in...
@@ -1722,42 +1651,34 @@ wxPGProperty* wxPropertyGridPageState::DoInsert( wxPGProperty* parent, int index
     //   1) Add to given category in given index.
     //   2) Add as last item in m_abcArray.
 
-    if ( !parent->IsCategory() && !parent->IsRoot() )
+    if ( m_properties == &m_regularArray )
     {
-        // Parent is wxParentingProperty: Just stick it in...
-        parent->AddChild2( property, index );
-    }
-    else
-    {
-        // Parent is Category or Root.
+        // We are currently in Categorized mode
 
-        if ( m_properties == &m_regularArray )
+        // Only add non-categories to m_abcArray.
+        if ( m_abcArray && !property->IsCategory() &&
+             (parentIsCategory || parentIsRoot) )
         {
-            // Categorized mode
-
-            // Only add non-categories to m_abcArray.
-            if ( m_abcArray && parenting <= 0 )
-                m_abcArray->AddChild2( property, -1, false );
-
-            // Add to current mode.
-            parent->AddChild2( property, index );
-
+            m_abcArray->AddChild2( property, -1, false );
         }
-        else
-        {
-            // Non-categorized mode.
 
-            if ( parent != m_properties )
-                // Parent is category.
-                parent->AddChild2( property, index, false );
-            else
-                // Parent is root.
-                m_regularArray.AddChild2( property, -1, false );
-
-            // Add to current mode (no categories).
-            if ( parenting <= 0 )
-                m_abcArray->AddChild2( property, index );
-        }
+        // Add to current mode.
+        parent->AddChild2( property, index, true );
+    }
+    else
+    {
+        // We are currently in Non-categorized/Alphabetic mode
+
+        if ( parentIsCategory )
+            // Parent is category.
+            parent->AddChild2( property, index, false );
+        else if ( parentIsRoot )
+            // Parent is root.
+            m_regularArray.AddChild2( property, -1, false );
+
+        // Add to current mode
+        if ( !property->IsCategory() )
+            m_abcArray->AddChild2( property, index, true );
     }
 
     // category stuff
@@ -1770,7 +1691,8 @@ wxPGProperty* wxPropertyGridPageState::DoInsert( wxPGProperty* parent, int index
     }
 
     // Only add name to hashmap if parent is root or category
-    if ( (parent->IsCategory() || parent->IsRoot()) && property->m_name.length() )
+    if ( property->m_name.length() &&
+        (parentIsCategory || parentIsRoot) )
         m_dictName[property->m_name] = (void*) property;
 
     VirtualHeightChanged();
@@ -1784,7 +1706,7 @@ wxPGProperty* wxPropertyGridPageState::DoInsert( wxPGProperty* parent, int index
 
 // -----------------------------------------------------------------------
 
-void wxPropertyGridPageState::DoDelete( wxPGProperty* item )
+void wxPropertyGridPageState::DoDelete( wxPGProperty* item, bool doDelete )
 {
     wxCHECK_RET( item->GetParent(),
         wxT("this property was already deleted") );
@@ -1792,59 +1714,43 @@ void wxPropertyGridPageState::DoDelete( wxPGProperty* item )
     wxCHECK_RET( item != &m_regularArray && item != m_abcArray,
         wxT("wxPropertyGrid: Do not attempt to remove the root item.") );
 
-    size_t i;
     unsigned int indinparent = item->GetIndexInParent();
 
     wxPGProperty* pwc = (wxPGProperty*)item;
+    wxPGProperty* parent = item->GetParent();
 
-    wxCHECK_RET( !item->GetParent()->HasFlag(wxPG_PROP_AGGREGATE),
+    wxCHECK_RET( !parent->HasFlag(wxPG_PROP_AGGREGATE),
         wxT("wxPropertyGrid: Do not attempt to remove sub-properties.") );
 
-    if ( item->IsCategory() )
+    // Delete children
+    if ( item->GetChildCount() && !item->HasFlag(wxPG_PROP_AGGREGATE) )
     {
         // deleting a category
-
-        // erase category entries from the hash table
-        for ( i=0; i<pwc->GetChildCount(); i++ )
+        if ( item->IsCategory() )
         {
-            wxPGProperty* sp = pwc->Item( i );
-            if ( sp->GetBaseName().Len() ) m_dictName.erase(sp->GetBaseName());
+            if ( pwc == m_currentCategory )
+                m_currentCategory = NULL;
         }
 
-        if ( pwc == m_currentCategory )
-            m_currentCategory = (wxPropertyCategory*) NULL;
-
-        if ( m_abcArray )
-        {
-            // Remove children from non-categorized array.
-            for ( i=0; i<pwc->GetChildCount(); i++ )
-            {
-                wxPGProperty * p = pwc->Item( i );
-                wxASSERT( p != NULL );
-                if ( !p->IsCategory() )
-                    m_abcArray->RemoveChild(p);
-            }
-
-            if ( IsInNonCatMode() )
-                m_abcArray->FixIndexesOfChildren();
-        }
+        item->DeleteChildren();
     }
 
     if ( !IsInNonCatMode() )
     {
         // categorized mode - non-categorized array
 
-        // Remove from non-cat array, but only if parent is in it
-        if ( !item->IsCategory() && item->GetParent()->IsCategory() )
+        // Remove from non-cat array
+        if ( !item->IsCategory() &&
+             (parent->IsCategory() || parent->IsRoot()) )
         {
             if ( m_abcArray )
                 m_abcArray->RemoveChild(item);
         }
 
         // categorized mode - categorized array
-        wxArrayPGProperty& parentsChildren = item->m_parent->m_children;
+        wxArrayPGProperty& parentsChildren = parent->m_children;
         parentsChildren.erase( parentsChildren.begin() + indinparent );
-        item->m_parent->FixIndexesOfChildren();
+        item->m_parent->FixIndicesOfChildren();
     }
     else
     {
@@ -1877,14 +1783,17 @@ void wxPropertyGridPageState::DoDelete( wxPGProperty* item )
             wxASSERT( item->m_parent == m_abcArray );
             wxArrayPGProperty& parentsChildren = item->m_parent->m_children;
             parentsChildren.erase(parentsChildren.begin() + indinparent);
-            item->m_parent->FixIndexesOfChildren(indinparent);
+            item->m_parent->FixIndicesOfChildren(indinparent);
         }
     }
 
-    if ( item->GetBaseName().Len() ) m_dictName.erase(item->GetBaseName());
+    if ( item->GetBaseName().length() && 
+         (parent->IsCategory() || parent->IsRoot()) )
+        m_dictName.erase(item->GetBaseName());
 
     // We can actually delete it now
-    delete item;
+    if ( doDelete )
+        delete item;
 
     m_itemsAdded = 1; // Not a logical assignment (but required nonetheless).