Add wxArtProvider using Tango icons.

The icons are embedded as PNG images directly in the source code to avoid the
need for installing them. This does make the library larger though so provide
a wxUSE_ARTPROVIDER_TANGO option to turn the new code and associated bloat off.
Also turn it off by default under wxGTK as the native art provider is used
there anyhow.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66505 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

configure.in

@@ -389,6 +389,7 @@ DEFAULT_wxUSE_IPV6=no
 DEFAULT_wxUSE_GSTREAMER8=no
 
 dnl automatic features
+DEFAULT_wxUSE_ARTPROVIDER_TANGO=auto
 DEFAULT_wxUSE_UNICODE_UTF8=auto
 DEFAULT_wxUSE_OPENGL=auto
 DEFAULT_wxUSE_MEDIACTRL=auto
@@ -452,6 +453,7 @@ if test "$wxUSE_ALL_FEATURES" = "no"; then
     dnl reset all the options with default value of auto if all features are to
     dnl be disabled because we can't have an option with default value of
     dnl "auto-or-no-if-wxUSE_ALL_FEATURES-is-disabled"
+    DEFAULT_wxUSE_ARTPROVIDER_TANGO=no
     DEFAULT_wxUSE_MEDIACTRL=no
 fi
 
@@ -926,6 +928,7 @@ fi
 dnl please keep the settings below in alphabetical order
 WX_ARG_FEATURE(accel,       [  --enable-accel          use accelerators], wxUSE_ACCEL)
 WX_ARG_FEATURE(animatectrl, [  --enable-animatectrl    use wxAnimationCtrl class], wxUSE_ANIMATIONCTRL)
+WX_ARG_FEATURE(arttango,    [  --enable-arttango       use Tango icons in wxArtProvider], wxUSE_ARTPROVIDER_TANGO)
 WX_ARG_FEATURE(bmpbutton,   [  --enable-bmpbutton      use wxBitmapButton class], wxUSE_BMPBUTTON)
 WX_ARG_FEATURE(bmpcombobox, [  --enable-bmpcombobox    use wxBitmapComboBox class], wxUSE_BITMAPCOMBOBOX)
 WX_ARG_FEATURE(button,      [  --enable-button         use wxButton class], wxUSE_BUTTON)
@@ -7144,6 +7147,23 @@ if test "$wxUSE_ACCESSIBILITY" = "yes"; then
     SAMPLES_SUBDIRS="$SAMPLES_SUBDIRS access"
 fi
 
+if test "$wxUSE_ARTPROVIDER_TANGO" = "auto"; then
+    dnl Tango-based art provider is not needed in GTK-based ports as the
+    dnl native art provider completely replaces it.
+    if test "$wxUSE_GTK" != 1; then
+        dnl It also requires support for memory-mapped PNG images.
+        if test "$wxUSE_LIBPNG" != no -a \
+                "$wxUSE_IMAGE" = yes -a \
+                "$wxUSE_STREAMS" = yes; then
+            wxUSE_ARTPROVIDER_TANGO="yes"
+        fi
+    fi
+fi
+
+if test "$wxUSE_ARTPROVIDER_TANGO" = "yes"; then
+    AC_DEFINE(wxUSE_ARTPROVIDER_TANGO)
+fi
+
 if test "$wxUSE_DRAGIMAGE" = "yes"; then
     AC_DEFINE(wxUSE_DRAGIMAGE)
     SAMPLES_SUBDIRS="$SAMPLES_SUBDIRS dragimag"