Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2011 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.help.ui.internal.views; import org.eclipse.help.ui.internal.HelpUIResources; import org.eclipse.help.ui.internal.IHelpUIConstants; import org.eclipse.help.ui.internal.Messages; import org.eclipse.jface.action.IAction; import org.eclipse.jface.action.IMenuManager; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.layout.RowData; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.ui.IMemento; import org.eclipse.ui.actions.ActionFactory; import org.eclipse.ui.forms.AbstractFormPart; import org.eclipse.ui.forms.HyperlinkGroup; import org.eclipse.ui.forms.events.HyperlinkAdapter; import org.eclipse.ui.forms.events.HyperlinkEvent; import org.eclipse.ui.forms.events.IHyperlinkListener; import org.eclipse.ui.forms.widgets.FormToolkit; import org.eclipse.ui.forms.widgets.ImageHyperlink; public class SeeAlsoPart extends AbstractFormPart implements IHelpPart { private Composite container; private Composite linkContainer; private ReusableHelpPart helpPart; private String id; private Image bgImage; private HyperlinkGroup hyperlinkGroup; /** * @param parent * @param toolkit * @param style */ public SeeAlsoPart(Composite parent, FormToolkit toolkit) { container = toolkit.createComposite(parent); container.setBackgroundMode(SWT.INHERIT_DEFAULT); GridLayout layout = new GridLayout(); layout.marginHeight = 0; //layout.marginWidth = 0; layout.verticalSpacing = 0; layout.marginTop = 2; container.setLayout(layout); linkContainer = new Composite(container, SWT.NULL); linkContainer.setLayoutData(new GridData(GridData.FILL_BOTH)); RowLayout rlayout = new RowLayout(); rlayout.marginBottom = 0; rlayout.marginTop = 0; rlayout.marginLeft = 0; rlayout.marginRight = 0; rlayout.justify = false; rlayout.wrap = true; linkContainer.setLayout(rlayout); hyperlinkGroup = new HyperlinkGroup(container.getDisplay()); hyperlinkGroup.setHyperlinkUnderlineMode(toolkit.getHyperlinkGroup().getHyperlinkUnderlineMode()); } private void updateLinks(String href) { Control[] children = linkContainer.getChildren(); for (int i = 0; i < children.length; i++) { ImageHyperlink link = (ImageHyperlink) children[i]; RowData data = (RowData) link.getLayoutData(); boolean isCurrentPage = link.getHref().equals(href); if (isCurrentPage) { link.setFont(JFaceResources.getBannerFont()); } else { link.setFont(JFaceResources.getDefaultFont()); } data.exclude = false; link.setVisible(!data.exclude); } linkContainer.layout(); helpPart.reflow(); } private void addLinks(final Composite container, FormToolkit toolkit) { IHyperlinkListener listener = new HyperlinkAdapter() { public void linkActivated(final HyperlinkEvent e) { container.getDisplay().asyncExec(new Runnable() { public void run() { SeeAlsoPart.this.helpPart.showPage((String) e.getHref(), true); } }); } }; if ((helpPart.getStyle() & ReusableHelpPart.ALL_TOPICS) != 0) addPageLink(container, toolkit, Messages.SeeAlsoPart_allTopics, IHelpUIConstants.HV_ALL_TOPICS_PAGE, IHelpUIConstants.IMAGE_ALL_TOPICS, listener); if ((helpPart.getStyle() & ReusableHelpPart.SEARCH) != 0) { addPageLink(container, toolkit, Messages.SeeAlsoPart_search, IHelpUIConstants.HV_FSEARCH_PAGE, IHelpUIConstants.IMAGE_HELP_SEARCH, listener); } if ((helpPart.getStyle() & ReusableHelpPart.CONTEXT_HELP) != 0) { addPageLink(container, toolkit, Messages.SeeAlsoPart_contextHelp, IHelpUIConstants.HV_CONTEXT_HELP_PAGE, IHelpUIConstants.IMAGE_RELATED_TOPICS, listener); } if ((helpPart.getStyle() & ReusableHelpPart.BOOKMARKS) != 0) { addPageLink(container, toolkit, Messages.SeeAlsoPart_bookmarks, IHelpUIConstants.HV_BOOKMARKS_PAGE, IHelpUIConstants.IMAGE_BOOKMARKS, listener); } if ((helpPart.getStyle() & ReusableHelpPart.INDEX) != 0) { addPageLink(container, toolkit, Messages.SeeAlsoPart_index, IHelpUIConstants.HV_INDEX_PAGE, IHelpUIConstants.IMAGE_INDEX, listener); } } private void addPageLink(Composite container, FormToolkit toolkit, String text, String id, String imgRef, IHyperlinkListener listener) { String cid = helpPart.getCurrentPageId(); if (cid != null && cid.equals(id)) return; ImageHyperlink link = new ImageHyperlink(container, SWT.WRAP | toolkit.getOrientation()); toolkit.adapt(link, true, true); link.setImage(HelpUIResources.getImage(imgRef)); link.setText(text); link.setHref(id); link.setBackground(null); link.addHyperlinkListener(listener); hyperlinkGroup.add(link); RowData data = new RowData(); data.exclude = false; link.setLayoutData(data); } /* * (non-Javadoc) * * @see org.eclipse.help.ui.internal.views.IHelpPart#getControl() */ public Control getControl() { return container; } /* * (non-Javadoc) * * @see org.eclipse.help.ui.internal.views.IHelpPart#init(org.eclipse.help.ui.internal.views.NewReusableHelpPart) */ public void init(ReusableHelpPart parent, String id, IMemento memento) { this.helpPart = parent; this.id = id; FormToolkit toolkit = helpPart.getForm().getToolkit(); addLinks(linkContainer, toolkit); Composite padding = toolkit.createComposite(container); GridData paddingData = new GridData(GridData.HORIZONTAL_ALIGN_FILL); paddingData.heightHint = 2; padding.setLayoutData(paddingData); Composite separator = new Composite(container, SWT.NULL); GridData seperatorData = new GridData(GridData.HORIZONTAL_ALIGN_FILL); separator.setBackground(toolkit.getColors().getBorderColor()); seperatorData.heightHint = 1; separator.setLayoutData(seperatorData); } public String getId() { return id; } /* * (non-Javadoc) * * @see org.eclipse.help.ui.internal.views.IHelpPart#setVisible(boolean) */ public void setVisible(boolean visible) { container.setVisible(visible); if (visible) markStale(); } /* (non-Javadoc) * @see org.eclipse.ui.forms.AbstractFormPart#dispose() */ public void dispose() { super.dispose(); if (bgImage != null && !bgImage.isDisposed()) { bgImage.dispose(); } } /* * (non-Javadoc) * * @see org.eclipse.help.ui.internal.views.IHelpPart#fillContextMenu(org.eclipse.jface.action.IMenuManager) */ public boolean fillContextMenu(IMenuManager manager) { return false; } /* * (non-Javadoc) * * @see org.eclipse.help.ui.internal.views.IHelpPart#hasFocusControl(org.eclipse.swt.widgets.Control) */ public boolean hasFocusControl(Control control) { return control != null && control.getParent() == linkContainer; } public IAction getGlobalAction(String id) { if (id.equals(ActionFactory.COPY.getId())) return helpPart.getCopyAction(); return null; } public void stop() { } public void refresh() { if (linkContainer != null && helpPart.getCurrentPageId() != null) updateLinks(helpPart.getCurrentPageId()); super.refresh(); } public void toggleRoleFilter() { } public void refilter() { } public void saveState(IMemento memento) { } public void setFocus() { if (linkContainer != null) linkContainer.setFocus(); } }