Added wxPropertyGrid::GetUnspecifiedValueText(). Use it instead of assuming that the unspecified value text is always an empty string.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62955 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/propgrid/propgrid.h

@@ -1239,6 +1239,14 @@ public:
         return m_sortFunction;
     }
 
+    /**
+        Returns (visual) text representation of the unspecified
+        property value.
+
+        @param argFlags For internal use only.
+    */
+    wxString GetUnspecifiedValueText( int argFlags = 0 ) const;
+
     /** Set virtual width for this particular page. Width -1 indicates that the
         virtual width should be disabled. */
     void SetVirtualWidth( int width );

interface/wx/propgrid/propgrid.h

@@ -740,6 +740,14 @@ public:
     */
     wxTextCtrl* GetEditorTextCtrl() const;
 
+    /**
+        Returns (visual) text representation of the unspecified
+        property value.
+
+        @param argFlags For internal use only.
+    */
+    wxString GetUnspecifiedValueText( int argFlags = 0 ) const;
+
     /**
         Returns current vertical spacing.
     */

src/propgrid/editors.cpp

@@ -173,6 +173,9 @@ void wxPGEditor::DrawValue( wxDC& dc, const wxRect& rect, wxPGProperty* property
 {
     if ( !property->IsValueUnspecified() )
         dc.DrawText( text, rect.x+wxPG_XBEFORETEXT, rect.y );
+    else
+        dc.DrawText( property->GetGrid()->GetUnspecifiedValueText(),
+                     rect.x+wxPG_XBEFORETEXT, rect.y );
 }
 
 bool wxPGEditor::GetValueFromControl( wxVariant&, wxPGProperty*, wxWindow* ) const
@@ -232,9 +235,9 @@ wxPGWindowList wxPGTextCtrlEditor::CreateControls( wxPropertyGrid* propGrid,
          property->GetChildCount() )
         return NULL;
 
-    if ( !property->IsValueUnspecified() )
-        text = property->GetValueAsString(property->HasFlag(wxPG_PROP_READONLY) ?
-                                            0 : wxPG_EDITABLE_VALUE);
+    int argFlags = property->HasFlag(wxPG_PROP_READONLY) ? 
+        0 : wxPG_EDITABLE_VALUE;
+    text = property->GetValueAsString(argFlags);
 
     int flags = 0;
     if ( (property->GetFlags() & wxPG_PROP_PASSWORD) &&
@@ -371,7 +374,7 @@ void wxPGTextCtrlEditor::SetValueToUnspecified( wxPGProperty* property, wxWindow
     wxASSERT(pg);  // Really, property grid should exist if editor does
     if ( pg )
     {
-        wxString unspecValueText;
+        wxString unspecValueText = pg->GetUnspecifiedValueText();
         pg->SetupTextCtrlValue(unspecValueText);
         tc->SetValue(unspecValueText);
     }
@@ -987,6 +990,7 @@ bool wxPGChoiceEditor::OnEvent( wxPropertyGrid* propGrid, wxPGProperty* property
                 if ( !cb->HasFlag(wxCB_READONLY) )
                 {
                     wxString unspecValueText;
+                    unspecValueText = propGrid->GetUnspecifiedValueText();
                     propGrid->SetupTextCtrlValue(unspecValueText);
                     cb->GetTextCtrl()->SetValue(unspecValueText);
                 }
@@ -1036,11 +1040,26 @@ void wxPGChoiceEditor::SetControlIntValue( wxPGProperty* WXUNUSED(property), wxW
 }
 
 
-void wxPGChoiceEditor::SetValueToUnspecified( wxPGProperty* WXUNUSED(property), wxWindow* ctrl ) const
+void wxPGChoiceEditor::SetValueToUnspecified( wxPGProperty* property,
+                                              wxWindow* ctrl ) const
 {
     wxOwnerDrawnComboBox* cb = (wxOwnerDrawnComboBox*)ctrl;
+
+    if ( !cb->HasFlag(wxCB_READONLY) )
+    {
+        wxPropertyGrid* pg = property->GetGrid();
+        if ( pg )
+        {
+            wxString tcText = pg->GetUnspecifiedValueText();
+            pg->SetupTextCtrlValue(tcText);
+            cb->SetValue(tcText);
+        }
+    }
+    else
+    {
         cb->SetSelection(-1);
     }
+}
 
 
 bool wxPGChoiceEditor::CanContainCustomImage() const

src/propgrid/property.cpp

@@ -928,8 +928,10 @@ wxString wxPGProperty::GetValueAsString( int argFlags ) const
     }
 #endif
 
+    wxPropertyGrid* pg = GetGrid();
+
     if ( IsValueUnspecified() )
-        return wxEmptyString;
+        return pg->GetUnspecifiedValueText(argFlags);
 
     if ( m_commonValue == -1 )
     {
@@ -939,7 +941,6 @@ wxString wxPGProperty::GetValueAsString( int argFlags ) const
 
     //
     // Return common value's string representation
-    wxPropertyGrid* pg = GetGrid();
     const wxPGCommonValue* cv = pg->GetCommonValue(m_commonValue);
 
     if ( argFlags & wxPG_FULL_VALUE )

src/propgrid/propgrid.cpp

@@ -3629,6 +3629,12 @@ void wxPropertyGrid::CustomSetCursor( int type, bool override )
     m_curcursor = type;
 }
 
+wxString
+wxPropertyGrid::GetUnspecifiedValueText( int WXUNUSED(argFlags) ) const
+{
+    return wxEmptyString;
+}
+
 // -----------------------------------------------------------------------
 // wxPropertyGrid property selection, editor creation
 // -----------------------------------------------------------------------