diff -Naur qt-x11-opensource-desktop-4.0.0-orig/src/gui/kernel/qaction.cpp qt-x11-opensource-desktop-4.0.0/src/gui/kernel/qaction.cpp
--- qt-x11-opensource-desktop-4.0.0-orig/src/gui/kernel/qaction.cpp	2005-06-24 10:54:44.000000000 -0300
+++ qt-x11-opensource-desktop-4.0.0/src/gui/kernel/qaction.cpp	2005-07-05 15:00:03.000000000 -0300
@@ -592,12 +592,23 @@
 QString QAction::toolTip() const
 {
     Q_D(const QAction);
-    if (d->tooltip.isEmpty()) {
-        if (!d->text.isEmpty())
-            return qt_strippedText(d->text);
-        return d->iconText;
+
+    QString s = d->tooltip;
+    if (s.isEmpty())
+        s = qt_strippedText(d->text);
+
+    if (!isEnabled()) {
+        QString reason = disableReason();
+	if (!reason.isEmpty()) {
+	    QString fmt("<p>%1</p>"
+			"<p><b>This item is not available for use.</b><br>"
+			"The reason it has been disabled is:<br>"
+			"<i>%2</i></p>");
+	    s = fmt.arg(s, reason);
+	}
     }
-    return d->tooltip;
+
+    return s;
 }
 
 /*!
@@ -624,7 +635,18 @@
 QString QAction::statusTip() const
 {
     Q_D(const QAction);
-    return d->statustip;
+
+    QString s = d->statustip;
+
+    if (!isEnabled()) {
+        QString reason = disableReason();
+	if (!reason.isEmpty()) {
+	    QString fmt("%1%2Disabled:%3");
+	    s = fmt.arg(s, (s.isEmpty() ?  "" : " "), reason);
+	}
+    }
+
+    return s;
 }
 
 /*!
@@ -653,6 +675,25 @@
     return d->whatsthis;
 }
 
+/*!
+    \property QAction::disableReason
+    \brief the action's disable reason
+*/
+void QAction::setDisableReason(const QString &reason)
+{
+    Q_D(QAction);
+    if (d->disablereason == reason)
+        return;
+
+    d->disablereason = reason;
+    d->sendDataChanged();
+}
+
+QString QAction::disableReason() const
+{
+    Q_D(const QAction);
+    return d->disablereason;
+}
 
 /*!
     \property QAction::checkable
@@ -771,6 +812,21 @@
     return d->enabled;
 }
 
+
+void QAction::disable(const QString &reason)
+{
+    setEnabled(false);
+    setDisableReason(reason);
+}
+
+void QAction::enable()
+{
+    setDisableReason("");
+    setEnabled(true);
+}
+
+
+
 /*!
     \property QAction::visible
     \brief whether the action can be seen (e.g. in menus and toolbars)
diff -Naur qt-x11-opensource-desktop-4.0.0-orig/src/gui/kernel/qaction.h qt-x11-opensource-desktop-4.0.0/src/gui/kernel/qaction.h
--- qt-x11-opensource-desktop-4.0.0-orig/src/gui/kernel/qaction.h	2005-06-24 10:54:44.000000000 -0300
+++ qt-x11-opensource-desktop-4.0.0/src/gui/kernel/qaction.h	2005-07-05 14:12:00.000000000 -0300
@@ -53,6 +53,7 @@
     Q_PROPERTY(QString toolTip READ toolTip WRITE setToolTip)
     Q_PROPERTY(QString statusTip READ statusTip WRITE setStatusTip)
     Q_PROPERTY(QString whatsThis READ whatsThis WRITE setWhatsThis)
+    Q_PROPERTY(QString disableReason READ disableReason WRITE setDisableReason)
     Q_PROPERTY(QKeySequence shortcut READ shortcut WRITE setShortcut)
     Q_PROPERTY(QFont font READ font WRITE setFont)
     Q_PROPERTY(Qt::ShortcutContext shortcutContext READ shortcutContext WRITE setShortcutContext)
@@ -93,6 +94,9 @@
     void setWhatsThis(const QString &what);
     QString whatsThis() const;
 
+    void setDisableReason(const QString &reason);
+    QString disableReason() const;
+
     QMenu *menu() const;
     void setMenu(QMenu *menu);
 
@@ -153,6 +157,8 @@
     void toggle();
     void setEnabled(bool);
     inline void setDisabled(bool b) { setEnabled(!b); }
+    void disable(const QString &reason);
+    void enable();
     void setVisible(bool);
 
 signals:
diff -Naur qt-x11-opensource-desktop-4.0.0-orig/src/gui/kernel/qaction_p.h qt-x11-opensource-desktop-4.0.0/src/gui/kernel/qaction_p.h
--- qt-x11-opensource-desktop-4.0.0-orig/src/gui/kernel/qaction_p.h	2005-06-24 10:54:44.000000000 -0300
+++ qt-x11-opensource-desktop-4.0.0/src/gui/kernel/qaction_p.h	2005-07-05 14:10:50.000000000 -0300
@@ -64,6 +64,7 @@
     QString tooltip;
     QString statustip;
     QString whatsthis;
+    QString disablereason;
     QKeySequence shortcut;
     QVariant userData;
     int shortcutId;
diff -Naur qt-x11-opensource-desktop-4.0.0-orig/src/gui/kernel/qwidget.cpp qt-x11-opensource-desktop-4.0.0/src/gui/kernel/qwidget.cpp
--- qt-x11-opensource-desktop-4.0.0-orig/src/gui/kernel/qwidget.cpp	2005-06-24 10:54:45.000000000 -0300
+++ qt-x11-opensource-desktop-4.0.0/src/gui/kernel/qwidget.cpp	2005-07-05 15:00:20.000000000 -0300
@@ -1831,6 +1831,18 @@
     d->setEnabled_helper(enable);
 }
 
+void QWidget::disable(const QString &reason)
+{
+    setEnabled(false);
+    setDisableReason(reason);
+}
+
+void QWidget::enable()
+{
+    setDisableReason("");
+    setEnabled(true);
+}
+
 void QWidgetPrivate::setEnabled_helper(bool enable)
 {
     Q_Q(QWidget);
@@ -4917,20 +4929,26 @@
         break;
 
     case QEvent::Enter:
-        if (d->statusTip.size()) {
-            QStatusTipEvent tip(d->statusTip);
-            QApplication::sendEvent(const_cast<QWidget *>(this), &tip);
-        }
-        enterEvent(e);
-        break;
+        {
+	    QString s = statusTip();
+	    if (s.size()) {
+                QStatusTipEvent tip(s);
+		QApplication::sendEvent(const_cast<QWidget *>(this), &tip);
+	    }
+	    enterEvent(e);
+	}
+	break;
 
     case QEvent::Leave:
-        if (d->statusTip.size()) {
-            QString empty;
-            QStatusTipEvent tip(empty);
-            QApplication::sendEvent(const_cast<QWidget *>(this), &tip);
-        }
-        leaveEvent(e);
+        {
+	    QString s = statusTip();
+	    if (s.size()) {
+                QString empty;
+		QStatusTipEvent tip(empty);
+		QApplication::sendEvent(const_cast<QWidget *>(this), &tip);
+	    }
+	    leaveEvent(e);
+	}
         break;
 
     case QEvent::HoverEnter:
@@ -5113,10 +5131,14 @@
         break;
 
     case QEvent::ToolTip:
-        if (d->toolTip.size() && isActiveWindow())
-            QToolTip::showText(static_cast<QHelpEvent*>(e)->globalPos(), d->toolTip, this);
-        else
-            e->ignore();
+        {
+  	    QString s = toolTip();
+	    if (!s.isEmpty() && isActiveWindow())
+	        QToolTip::showText(static_cast<QHelpEvent*>(e)->globalPos(),
+				   s, this);
+	    else
+	        e->ignore();
+	}
         break;
 
 #ifndef QT_NO_WHATSTHIS
@@ -6585,7 +6607,21 @@
 QString QWidget::toolTip() const
 {
     Q_D(const QWidget);
-    return d->toolTip;
+
+    QString s = d->toolTip;
+
+    if (!isEnabled()) {
+        QString reason = disableReason();
+        if (!reason.isEmpty()) {
+	    QString fmt("<p>%1</p>"
+			"<p><b>This item is not available for use.</b><br>"
+			"The reason it has been disabled is:<br>"
+			"<i>%2</i></p>");
+	    s = fmt.arg(s, reason);
+	}
+    }
+
+    return s;
 }
 
 /*!
@@ -6604,7 +6640,18 @@
 QString QWidget::statusTip() const
 {
     Q_D(const QWidget);
-    return d->statusTip;
+
+    QString s = d->statusTip;
+
+    if (!isEnabled()) {
+        QString reason = disableReason();
+	if (!reason.isEmpty()) {
+	    QString fmt("%1%2Disabled:%3");
+	    s = fmt.arg(s, (s.isEmpty() ?  "" : " "), reason);
+	}
+    }
+
+    return s;
 }
 
 /*!
@@ -6626,6 +6673,33 @@
     return d->whatsThis;
 }
 
+/*!
+  \property QWidget::disableReason
+
+  \brief the reason why widget is disabled.
+
+  \sa QWidget::toolTip QWidget::statusTip QWidget::disabled()
+*/
+void QWidget::setDisableReason(const QString &s)
+{
+    Q_D(QWidget);
+    d->disableReason = s;
+}
+
+QString QWidget::disableReason() const
+{
+    Q_D(const QWidget);
+
+    QString s = d->disableReason;
+
+    if (s.isEmpty()) {
+        QWidget *p = (QWidget*)parent();
+	if (p != NULL)
+	  s = p->disableReason();
+    }
+    return s;
+}
+
 #ifndef QT_NO_ACCESSIBILITY
 /*!
   \property QWidget::accessibleName
diff -Naur qt-x11-opensource-desktop-4.0.0-orig/src/gui/kernel/qwidget.h qt-x11-opensource-desktop-4.0.0/src/gui/kernel/qwidget.h
--- qt-x11-opensource-desktop-4.0.0-orig/src/gui/kernel/qwidget.h	2005-06-24 10:54:45.000000000 -0300
+++ qt-x11-opensource-desktop-4.0.0/src/gui/kernel/qwidget.h	2005-07-04 17:43:19.000000000 -0300
@@ -166,6 +166,7 @@
     Q_PROPERTY(QString toolTip READ toolTip WRITE setToolTip)
     Q_PROPERTY(QString statusTip READ statusTip WRITE setStatusTip)
     Q_PROPERTY(QString whatsThis READ whatsThis WRITE setWhatsThis)
+    Q_PROPERTY(QString disableReason READ disableReason WRITE setDisableReason)
 #ifndef QT_NO_ACCESSIBILITY
     Q_PROPERTY(QString accessibleName READ accessibleName WRITE setAccessibleName)
     Q_PROPERTY(QString accessibleDescription READ accessibleDescription WRITE setAccessibleDescription)
@@ -203,6 +204,8 @@
 public slots:
     void setEnabled(bool);
     void setDisabled(bool);
+    void disable(const QString &);
+    void enable();
     void setWindowModified(bool);
 
     // Widget coordinates
@@ -315,6 +318,9 @@
     void setWhatsThis(const QString &);
     QString whatsThis() const;
 
+    void setDisableReason(const QString &);
+    QString disableReason() const;
+
 #ifndef QT_NO_ACCESSIBILITY
     QString accessibleName() const;
     void setAccessibleName(const QString &name);
@@ -581,6 +587,7 @@
     QWidget(QWidgetPrivate &d, QWidget* parent, Qt::WFlags f);
 private:
 
+
     bool testAttribute_helper(Qt::WidgetAttribute) const;
 
     friend class QApplication;
diff -Naur qt-x11-opensource-desktop-4.0.0-orig/src/gui/kernel/qwidget_p.h qt-x11-opensource-desktop-4.0.0/src/gui/kernel/qwidget_p.h
--- qt-x11-opensource-desktop-4.0.0-orig/src/gui/kernel/qwidget_p.h	2005-06-24 10:54:45.000000000 -0300
+++ qt-x11-opensource-desktop-4.0.0/src/gui/kernel/qwidget_p.h	2005-07-04 17:50:09.000000000 -0300
@@ -305,7 +305,7 @@
     int leftmargin, topmargin, rightmargin, bottommargin;
     // ### TODO: reorganize private/extra/topextra to save memory
     QPointer<QWidget> compositeChildGrab;
-    QString toolTip, statusTip, whatsThis;
+    QString toolTip, statusTip, whatsThis, disableReason;
     QString accessibleName, accessibleDescription;
 
 #ifndef QT_NO_PALETTE