Update output tracking state of screen window when scrolling using Shift+Page/Arrow keys

svn path=/trunk/KDE/kdebase/apps/konsole/; revision=666825

src/ScreenWindow.cpp

@@ -140,6 +140,11 @@ void ScreenWindow::scrollBy( RelativeScrollMode mode , int amount )
     }
 }
 
+bool ScreenWindow::atEndOfOutput() const
+{
+    return _currentLine >= (lineCount()-windowLines());
+}
+
 void ScreenWindow::scrollTo( int line )
 {
     if ( line < 0 )

src/ScreenWindow.h

@@ -137,6 +137,12 @@ public:
     /** Returns the index of the line which is currently at the top of this window */
     int currentLine() const;
 
+    /** 
+     * Convenience method. Returns true if the window is currently at the bottom
+     * of the screen.
+     */
+    bool atEndOfOutput() const;
+
     /** Scrolls the window so that @p line is at the top of the window */
     void scrollTo( int line );
 

src/TerminalDisplay.cpp

@@ -2246,6 +2246,8 @@ void TerminalDisplay::keyPressEvent( QKeyEvent* event )
 
         if ( update )
         {
+            _screenWindow->setTrackOutput( _screenWindow->atEndOfOutput() );
+
             updateLineProperties();
             updateImage();
         }