[PATCH] kconfig: add "void conf_set_changed_callback(void (*fn)(void))", use it in qconf.cc

Added function sets "void (*conf_changed_callback)(void)".  Call it, if
.config's changed state changes.  Use above in qconf.cc to set gui's
save-widget's sensitvity.

Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 12 insertions, 1 deletions

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 8d60d99bd9f1..0b2fcc417f59 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -38,6 +38,8 @@
 static QApplication *configApp;
 static ConfigSettings *configSettings;
 
+QAction *ConfigMainWindow::saveAction;
+
 static inline QString qgettext(const char* str)
 {
         return QString::fromLocal8Bit(gettext(str));
@@ -1306,8 +1308,11 @@ ConfigMainWindow::ConfigMainWindow(void)
           connect(quitAction, SIGNAL(activated()), SLOT(close()));
         QAction *loadAction = new QAction("Load", QPixmap(xpm_load), "&Load", CTRL+Key_L, this);
           connect(loadAction, SIGNAL(activated()), SLOT(loadConfig()));
-        QAction *saveAction = new QAction("Save", QPixmap(xpm_save), "&Save", CTRL+Key_S, this);
+        saveAction = new QAction("Save", QPixmap(xpm_save), "&Save", CTRL+Key_S, this);
           connect(saveAction, SIGNAL(activated()), SLOT(saveConfig()));
+        conf_set_changed_callback(conf_changed);
+        // Set saveAction's initial state
+        conf_changed();
         QAction *saveAsAction = new QAction("Save As...", "Save &As...", 0, this);
           connect(saveAsAction, SIGNAL(activated()), SLOT(saveConfigAs()));
         QAction *searchAction = new QAction("Search", "&Search", CTRL+Key_F, this);
@@ -1658,6 +1663,12 @@ void ConfigMainWindow::saveSettings(void)
         configSettings->writeSizes("/split2", split2->sizes());
 }
 
+void ConfigMainWindow::conf_changed(void)
+{
+        if (saveAction)
+                saveAction->setEnabled(conf_get_changed());
+}
+
 void fixup_rootmenu(struct menu *menu)
 {
         struct menu *child;