Take into account the initial buttons state when creating wxGTK toolbar.

With wxMSW it is possible to call e.g. wxToolBarTool::Enable(false) on a tool
before calling wxToolBar::Realize() to create the tool in an initially
disabled state but this wasn't done in wxGTK version.

Override Realize() now under wxGTK to bring the native toolbar buttons state
in sync with the internal state of the corresponding wxToolBarTools.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62994 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/toolbar.cpp

@@ -445,6 +445,32 @@ void wxToolBar::SetWindowStyleFlag( long style )
         GtkSetStyle();
 }
 
+bool wxToolBar::Realize()
+{
+    if ( !wxToolBarBase::Realize() )
+        return false;
+
+    // bring the initial state of all the toolbar items in line with the
+    // internal state if the latter was changed by calling wxToolBarTool::
+    // Enable(): this works under MSW, where the toolbar items are only created
+    // in Realize() which uses the internal state to determine the initial
+    // button state, so make it work under GTK too
+    for ( wxToolBarToolsList::const_iterator i = m_tools.begin();
+          i != m_tools.end();
+          ++i )
+    {
+        // by default the toolbar items are enabled and not toggled, so we only
+        // have to do something if their internal state doesn't correspond to
+        // this
+        if ( !(*i)->IsEnabled() )
+            DoEnableTool(*i, false);
+        if ( (*i)->IsToggled() )
+            DoToggleTool(*i, true);
+    }
+
+    return true;
+}
+
 bool wxToolBar::DoInsertTool(size_t pos, wxToolBarToolBase *toolBase)
 {
     wxToolBarTool* tool = static_cast<wxToolBarTool*>(toolBase);