trace/traceviewer/com.nokia.traceviewer/src/com/nokia/traceviewer/view/listener/ScrollerSelectionListener.java
/*
* Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description:
*
* Scroller Selection Listener class
*
*/
package com.nokia.traceviewer.view.listener;
import org.eclipse.jface.text.TextViewer;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.widgets.Slider;
import com.nokia.traceviewer.engine.StateHolder;
import com.nokia.traceviewer.engine.TraceViewerGlobals;
/**
* Scroller Selection Listener listens changes in view's scroller
*/
public class ScrollerSelectionListener implements SelectionListener {
/**
* Text viewer
*/
private final TextViewer viewer;
/**
* Constructor
*
* @param viewer
* the viewer
*/
public ScrollerSelectionListener(TextViewer viewer) {
this.viewer = viewer;
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.swt.events.SelectionListener#widgetDefaultSelected(org.eclipse
* .swt.events.SelectionEvent)
*/
public void widgetDefaultSelected(SelectionEvent e) {
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.swt.events.SelectionListener#widgetSelected(org.eclipse.swt
* .events.SelectionEvent)
*/
public void widgetSelected(SelectionEvent e) {
Slider slider = (Slider) e.getSource();
TraceViewerGlobals.getTraceViewer().getStateHolder().setState(
StateHolder.State.SCROLLING_WITH_SCROLLBAR);
// Scroll to new line
TraceViewerGlobals.getTraceViewer().getView().scrollViewToLine(
slider.getSelection());
viewer.setTopIndex(slider.getSelection()
- TraceViewerGlobals.getTraceViewer().getView()
.getShowingTracesFrom());
}
}