Add support for HistoryBackButton and HistoryForwardButton

This resolves TDE/tdebase#421.

Signed-off-by: Mavridis Philippe <mavridisf@gmail.com>

src/kernel/ntqnamespace.h

@@ -78,7 +78,9 @@ public:
 	LeftButton	     = 0x0001,
 	RightButton	     = 0x0002,
 	MidButton	     = 0x0004,
-	MouseButtonMask = 0x0007,
+	HistoryBackButton    = 0x0008,
+	HistoryForwardButton = 0x0010,
+	MouseButtonMask      = 0x001f,
 	ShiftButton	     = 0x0100,
 	ControlButton        = 0x0200,
 	AltButton	     = 0x0400,

src/kernel/qapplication_x11.cpp

@@ -4228,6 +4228,10 @@ bool TQETWidget::translateMouseEvent( const XEvent *event )
 		translateWheelEvent( globalPos.x(), globalPos.y(), delta, state, (hor)?Horizontal:Vertical );
 	    }
 	    return TRUE;
+
+        // history navigation buttons
+        case 8: button = HistoryBackButton; break;
+        case 9: button = HistoryForwardButton; break;
 	}
 	if ( event->type == ButtonPress ) {	// mouse button pressed
 #if defined(Q_OS_IRIX) && defined(QT_TABLET_SUPPORT)

src/kernel/qevent.cpp

@@ -91,6 +91,8 @@
     the right button on left-handed mice.)
     \value RightButton  the right button.
     \value MidButton  the middle button.
+    \value HistoryBackButton  history navigation back button.
+    \value HistoryForwardButton  history navigation forward button.
     \value ShiftButton  a Shift key on the keyboard is also pressed.
     \value ControlButton  a Ctrl key on the keyboard is also pressed.
     \value AltButton  an Alt key on the keyboard is also pressed.
@@ -98,7 +100,8 @@
     \value Keypad  a keypad button is pressed.
     \value KeyButtonMask a mask for ShiftButton, ControlButton,
     AltButton and MetaButton.
-    \value MouseButtonMask a mask for LeftButton, RightButton and MidButton.
+    \value MouseButtonMask a mask for LeftButton, RightButton, MidButton,
+    HistoryBackButton and HistoryForwardButton.
 */
 
 /*!