Added optional purely QML scrollbar.

lib/TerminalDisplay.cpp

@@ -387,6 +387,8 @@ TerminalDisplay::TerminalDisplay(QQuickItem *parent)
 
   setFlags(ItemHasContents | ItemAcceptsInputMethod);
 
+  connect(_scrollBar, SIGNAL(valueChanged(int)), this, SIGNAL(scrollbarParamsChanged(int)));
+
   // TODO Forcing rendering to Framebuffer. We need to determine if this is ok
   // always or if we need to make this customizable.
   setRenderTarget(QQuickPaintedItem::FramebufferObject);
@@ -1713,6 +1715,9 @@ void TerminalDisplay::scrollBarPositionChanged(int)
   _screenWindow->setTrackOutput( atEndOfOutput );
 
   updateImage();
+
+  // QMLTermWidget: notify qml side of the change only when needed.
+  emit scrollbarValueChanged();
 }
 
 void TerminalDisplay::setScroll(int cursor, int slines)
@@ -3282,4 +3287,19 @@ bool TerminalDisplay::getUsesMouse()
     return !usesMouse();
 }
 
+int TerminalDisplay::getScrollbarValue()
+{
+    return _scrollBar->value();
+}
+
+int TerminalDisplay::getScrollbarMaximum()
+{
+    return _scrollBar->maximum();
+}
+
+int TerminalDisplay::getScrollbarMinimum()
+{
+    return _scrollBar->minimum();
+}
+
 //#include "TerminalDisplay.moc"