Add wxAddRemoveCtrl class.

This is a simple high level helper combining an arbitrary control showing
multiple items with the buttons allowing to add items to and remove items from
this control, but using the buttons and the layout appropriate for the current
platform.

Add the implementation itself, an example of using it to the dialogs sample
and the documentation.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78462 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

configure

@@ -1242,6 +1242,7 @@ enable_dnd
 enable_controls
 enable_markup
 enable_accel
+enable_addremovectrl
 enable_animatectrl
 enable_bannerwindow
 enable_artstd
@@ -2173,6 +2174,7 @@ Optional Features:
   --disable-controls      disable compilation of all standard controls
   --enable-markup         support wxControl::SetLabelMarkup
   --enable-accel          use accelerators
+  --enable-addremovectrl  use wxAddRemoveCtrl
   --enable-animatectrl    use wxAnimationCtrl class
   --enable-bannerwindow   use wxBannerWindow class
   --enable-artstd         use standard XPM icons in wxArtProvider
@@ -11243,6 +11245,50 @@ fi
 $as_echo "$result" >&6; }
 
 
+          enablestring=
+          defaultval=$wxUSE_ALL_FEATURES
+          if test -z "$defaultval"; then
+              if test x"$enablestring" = xdisable; then
+                  defaultval=yes
+              else
+                  defaultval=no
+              fi
+          fi
+
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for --${enablestring:-enable}-addremovectrl" >&5
+$as_echo_n "checking for --${enablestring:-enable}-addremovectrl... " >&6; }
+          # Check whether --enable-addremovectrl was given.
+if test "${enable_addremovectrl+set}" = set; then :
+  enableval=$enable_addremovectrl;
+                          if test "$enableval" = yes; then
+                            wx_cv_use_addremovectrl='wxUSE_ADDREMOVECTRL=yes'
+                          else
+                            wx_cv_use_addremovectrl='wxUSE_ADDREMOVECTRL=no'
+                          fi
+
+else
+
+                          wx_cv_use_addremovectrl='wxUSE_ADDREMOVECTRL=${'DEFAULT_wxUSE_ADDREMOVECTRL":-$defaultval}"
+
+fi
+
+
+          eval "$wx_cv_use_addremovectrl"
+
+          if test x"$enablestring" = xdisable; then
+            if test $wxUSE_ADDREMOVECTRL = no; then
+              result=yes
+            else
+              result=no
+            fi
+          else
+            result=$wxUSE_ADDREMOVECTRL
+          fi
+
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $result" >&5
+$as_echo "$result" >&6; }
+
+
           enablestring=
           defaultval=$wxUSE_ALL_FEATURES
           if test -z "$defaultval"; then
@@ -35704,6 +35750,11 @@ if test "$wxUSE_ACCEL" = "yes"; then
   USES_CONTROLS=1
 fi
 
+if test "$wxUSE_ADDREMOVECTRL" = "yes"; then
+  $as_echo "#define wxUSE_ADDREMOVECTRL 1" >>confdefs.h
+
+fi
+
 if test "$wxUSE_ANIMATIONCTRL" = "yes"; then
   $as_echo "#define wxUSE_ANIMATIONCTRL 1" >>confdefs.h