From fdd67a6a5099581e154492ffe3be07417fe52222 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Mon, 4 Jul 2011 09:03:00 +0000
Subject: [PATCH] Fix crash in wxDataViewProgressRenderer in non-Unicode build.

We can't use the column pointer in wxDataViewProgressRenderer ctor as it's not
set yet, so postpone setting the renderer label until later in non-Unicode
build which needs the font used by this column to do the conversion to UTF-8.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@68145 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 include/wx/gtk/dvrenderers.h |  8 +++++++
 src/gtk/dataview.cpp         | 44 ++++++++++++++++++++++++++++++------
 2 files changed, 45 insertions(+), 7 deletions(-)

diff --git a/include/wx/gtk/dvrenderers.h b/include/wx/gtk/dvrenderers.h
index 2e05380324..528a7a1235 100644
--- a/include/wx/gtk/dvrenderers.h
+++ b/include/wx/gtk/dvrenderers.h
@@ -185,9 +185,17 @@ public:
     virtual wxSize GetSize() const;
 
 private:
+    void GTKSetLabel();
+
     wxString    m_label;
     int         m_value;
 
+#if !wxUSE_UNICODE
+    // Flag used to indicate that we need to set the label because we were
+    // unable to do it in the ctor (see comments there).
+    bool m_needsToSetLabel;
+#endif // !wxUSE_UNICODE
+
 protected:
     DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewProgressRenderer)
 };
diff --git a/src/gtk/dataview.cpp b/src/gtk/dataview.cpp
index 01ba4e009c..8aba4f4d77 100644
--- a/src/gtk/dataview.cpp
+++ b/src/gtk/dataview.cpp
@@ -2459,15 +2459,20 @@ wxDataViewProgressRenderer::wxDataViewProgressRenderer( const wxString &label,
     {
         m_renderer = (GtkCellRenderer*) gtk_cell_renderer_progress_new();
 
-        GValue gvalue = { 0, };
-        g_value_init( &gvalue, G_TYPE_STRING );
-
-        g_value_set_string( &gvalue, wxGTK_CONV_FONT( m_label, GetOwner()->GetOwner()->GetFont() ) );
-        g_object_set_property( G_OBJECT(m_renderer), "text", &gvalue );
-        g_value_unset( &gvalue );
-
         SetMode(mode);
         SetAlignment(align);
+
+#if !wxUSE_UNICODE
+        // We can't initialize the renderer just yet because we don't have the
+        // pointer to the column that uses this renderer yet and so attempt to
+        // dereference GetOwner() to get the font that is used as a source of
+        // encoding in multibyte-to-Unicode conversion in GTKSetLabel() in
+        // non-Unicode builds would crash. So simply remember to do it later.
+        if ( !m_label.empty() )
+            m_needsToSetLabel = true;
+        else
+#endif // !wxUSE_UNICODE
+            GTKSetLabel();
     }
     else
 #endif
@@ -2481,11 +2486,36 @@ wxDataViewProgressRenderer::~wxDataViewProgressRenderer()
 {
 }
 
+void wxDataViewProgressRenderer::GTKSetLabel()
+{
+    GValue gvalue = { 0, };
+    g_value_init( &gvalue, G_TYPE_STRING );
+
+    // Take care to not use GetOwner() here if the label is empty, we can be
+    // called from ctor when GetOwner() is still NULL in this case.
+    g_value_set_string( &gvalue,
+                        m_label.empty() ? ""
+                                        : wxGTK_CONV_FONT(m_label,
+                                            GetOwner()->GetOwner()->GetFont())
+                      );
+    g_object_set_property( G_OBJECT(m_renderer), "text", &gvalue );
+    g_value_unset( &gvalue );
+
+#if !wxUSE_UNICODE
+    m_needsToSetLabel = false;
+#endif // !wxUSE_UNICODE
+}
+
 bool wxDataViewProgressRenderer::SetValue( const wxVariant &value )
 {
 #ifdef __WXGTK26__
     if (!gtk_check_version(2,6,0))
     {
+#if !wxUSE_UNICODE
+        if ( m_needsToSetLabel )
+            GTKSetLabel();
+#endif // !wxUSE_UNICODE
+
         gint tmp = (long) value;
         GValue gvalue = { 0, };
         g_value_init( &gvalue, G_TYPE_INT );
-- 
2.45.2