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/*******************************************************************************
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* Copyright (c) 2010 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* Research Group Software Construction,
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* RWTH Aachen University, Germany - initial API and implementation
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*/
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package org.eclipse.draw2d;
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import java.beans.PropertyChangeEvent;
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import java.beans.PropertyChangeListener;
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/**
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* A {@link ScrollPane} with transparent {@link ScrollBar}s.
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*
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* @author Alexander Nyssen
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* @author Philip Ritzkopf
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*
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* @since 3.6
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*/
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public class PuristicScrollPane extends ScrollPane {
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/**
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* A {@link ScrollBar} with no thumb and non-opaque buttons.
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*
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* @author Alexander Nyssen
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* @author Philip Ritzkopf
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*/
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public class PuristicScrollBar extends ScrollBar {
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/**
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* Instantiates a new transparent scroll bar.
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*
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* @param isHorizontal
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* whether this scroll bar is used as a horizontal one.
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*/
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public PuristicScrollBar(boolean isHorizontal) {
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super();
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setHorizontal(isHorizontal);
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setOpaque(false);
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}
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/**
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* @see org.eclipse.draw2d.ScrollBar#createDefaultDownButton()
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*/
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protected Clickable createDefaultDownButton() {
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Clickable buttonDown = super.createDefaultDownButton();
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buttonDown.setBorder(null);
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buttonDown.setOpaque(false);
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return buttonDown;
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}
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/**
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* @see org.eclipse.draw2d.ScrollBar#createDefaultThumb()
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*/
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protected IFigure createDefaultThumb() {
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return null;
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}
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/**
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* @see org.eclipse.draw2d.ScrollBar#createDefaultUpButton()
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*/
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protected Clickable createDefaultUpButton() {
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Clickable buttonUp = super.createDefaultUpButton();
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buttonUp.setBorder(null);
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buttonUp.setOpaque(false);
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return buttonUp;
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}
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/**
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* @see org.eclipse.draw2d.ScrollBar#createPageDown()
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*/
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protected Clickable createPageDown() {
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return null;
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}
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/**
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* @see org.eclipse.draw2d.ScrollBar#createPageUp()
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*/
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protected Clickable createPageUp() {
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return null;
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}
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/**
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* @see PropertyChangeListener#propertyChange(java.beans.
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* PropertyChangeEvent )
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*/
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public void propertyChange(PropertyChangeEvent event) {
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if (event.getSource() instanceof RangeModel) {
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getButtonDown().setVisible(
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getValue() != getMaximum() - getExtent());
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getButtonUp().setVisible(getValue() != getMinimum());
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}
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super.propertyChange(event);
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}
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}
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public PuristicScrollPane() {
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// layout to ensure, viewport gets complete client area
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setLayoutManager(new ScrollPaneLayout() {
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public void layout(IFigure parent) {
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// scroll panes are layouted normally
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super.layout(parent);
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// viewport gets complete client area
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ScrollPane scrollpane = (ScrollPane) parent;
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Viewport viewport = scrollpane.getViewport();
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viewport.setBounds(parent.getClientArea());
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}
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});
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}
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/**
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* @see org.eclipse.draw2d.ScrollPane#createVerticalScrollBar()
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*/
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protected void createVerticalScrollBar() {
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PuristicScrollBar verticalScrollBar = new PuristicScrollBar(false);
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setVerticalScrollBar(verticalScrollBar);
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}
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/**
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* @see org.eclipse.draw2d.ScrollPane#createHorizontalScrollBar()
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*/
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protected void createHorizontalScrollBar() {
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PuristicScrollBar horizontalScrollBar = new PuristicScrollBar(true);
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setHorizontalScrollBar(horizontalScrollBar);
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}
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}
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