Java tutorial
/* ********************************************************************** ** ** Copyright notice ** ** ** ** (c) 2005-2009 RSSOwl Development Team ** ** http://www.rssowl.org/ ** ** ** ** 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.rssowl.org/legal/epl-v10.html ** ** ** ** A copy is found in the file epl-v10.html and important notices to the ** ** license from the team is found in the textfile LICENSE.txt distributed ** ** in this package. ** ** ** ** This copyright notice MUST APPEAR in all copies of the file! ** ** ** ** Contributors: ** ** RSSOwl Development Team - initial API and implementation ** ** ** ** ********************************************************************** */ package org.rssowl.ui.internal.dialogs.bookmark; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.fieldassist.ContentProposalAdapter; import org.eclipse.jface.fieldassist.SimpleContentProposalProvider; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.SWT; import org.eclipse.swt.dnd.Clipboard; import org.eclipse.swt.dnd.TextTransfer; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.FontMetrics; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Link; import org.eclipse.swt.widgets.Text; import org.rssowl.core.Owl; import org.rssowl.core.internal.persist.pref.DefaultPreferences; import org.rssowl.core.persist.IBookMark; import org.rssowl.core.persist.ILabel; import org.rssowl.core.persist.dao.DynamicDAO; import org.rssowl.core.persist.dao.ICategoryDAO; import org.rssowl.core.persist.dao.ILabelDAO; import org.rssowl.core.persist.pref.IPreferenceScope; import org.rssowl.core.util.Pair; import org.rssowl.core.util.StringUtils; import org.rssowl.core.util.URIUtils; import org.rssowl.ui.internal.OwlUI; import org.rssowl.ui.internal.actions.ImportAction; import org.rssowl.ui.internal.util.JobRunner; import org.rssowl.ui.internal.util.LayoutUtils; import java.util.Collection; import java.util.Comparator; import java.util.HashMap; import java.util.Map; import java.util.Set; import java.util.TreeSet; /** * @author bpasero */ public class FeedDefinitionPage extends WizardPage { private Text fFeedLinkInput; private Text fKeywordInput; private Button fLoadTitleFromFeedButton; private Button fFeedByLinkButton; private Button fFeedByKeywordButton; private String fInitialLink; private IPreferenceScope fGlobalScope = Owl.getPreferenceService().getGlobalScope(); private boolean fIsAutoCompleteKeywordHooked; private Map<String, IBookMark> fExistingFeeds = new HashMap<String, IBookMark>(); /** * @param pageName * @param initialLink */ protected FeedDefinitionPage(String pageName, String initialLink) { super(pageName, pageName, OwlUI.getImageDescriptor("icons/wizban/bkmrk_wiz.gif")); //$NON-NLS-1$ setMessage(Messages.FeedDefinitionPage_CREATE_BOOKMARK); fInitialLink = initialLink; Collection<IBookMark> bookmarks = DynamicDAO.loadAll(IBookMark.class); for (IBookMark bookMark : bookmarks) { fExistingFeeds.put(bookMark.getFeedLinkReference().getLinkAsText(), bookMark); } } boolean loadTitleFromFeed() { return fLoadTitleFromFeedButton.getSelection(); } private String loadInitialLinkFromClipboard() { String initial = URIUtils.HTTP; Clipboard cb = new Clipboard(getShell().getDisplay()); TextTransfer transfer = TextTransfer.getInstance(); String data = (String) cb.getContents(transfer); data = (data != null) ? data.trim() : null; cb.dispose(); if (URIUtils.looksLikeLink(data)) initial = URIUtils.ensureProtocol(data); return initial; } String getLink() { return fFeedByLinkButton.getSelection() ? fFeedLinkInput.getText().trim() : null; } void setLink(String link) { fFeedLinkInput.setText(link); onLinkChange(); } String getKeyword() { return fFeedByKeywordButton.getSelection() ? fKeywordInput.getText() : null; } boolean isKeywordSubscription() { return StringUtils.isSet(getKeyword()); } /* * @see org.eclipse.jface.dialogs.DialogPage#setVisible(boolean) */ @Override public void setVisible(boolean visible) { super.setVisible(visible); if (visible && !isKeywordSubscription()) fFeedLinkInput.setFocus(); else if (visible) fKeywordInput.setFocus(); } /* * @see org.eclipse.jface.wizard.WizardPage#isPageComplete() */ @Override public boolean isPageComplete() { /* Checked for proper Link */ if (fFeedByLinkButton.getSelection()) return fFeedLinkInput.getText().length() > 0; /* Check for Keyword */ return fKeywordInput.getText().length() > 0; } /* * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite) */ public void createControl(Composite parent) { Composite container = new Composite(parent, SWT.NONE); container.setLayout(new GridLayout(1, false)); /* 1) Feed by Link */ if (!StringUtils.isSet(fInitialLink)) fInitialLink = loadInitialLinkFromClipboard(); boolean loadTitleFromFeed = fGlobalScope.getBoolean(DefaultPreferences.BM_LOAD_TITLE_FROM_FEED); fFeedByLinkButton = new Button(container, SWT.RADIO); fFeedByLinkButton.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false)); fFeedByLinkButton.setText(loadTitleFromFeed ? Messages.FeedDefinitionPage_CREATE_FEED : Messages.FeedDefinitionPage_CREATE_FEED_DIRECT); fFeedByLinkButton.setSelection(true); fFeedByLinkButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { fFeedLinkInput.setEnabled(fFeedByLinkButton.getSelection()); fLoadTitleFromFeedButton.setEnabled(fFeedByLinkButton.getSelection()); fFeedLinkInput.setFocus(); getContainer().updateButtons(); } }); Composite textIndent = new Composite(container, SWT.NONE); textIndent.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false)); textIndent.setLayout(new GridLayout(1, false)); ((GridLayout) textIndent.getLayout()).marginLeft = 10; ((GridLayout) textIndent.getLayout()).marginBottom = 10; fFeedLinkInput = new Text(textIndent, SWT.BORDER); fFeedLinkInput.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false)); OwlUI.makeAccessible(fFeedLinkInput, fFeedByLinkButton); GC gc = new GC(fFeedLinkInput); gc.setFont(JFaceResources.getDialogFont()); FontMetrics fontMetrics = gc.getFontMetrics(); int entryFieldWidth = Dialog.convertHorizontalDLUsToPixels(fontMetrics, IDialogConstants.ENTRY_FIELD_WIDTH); gc.dispose(); ((GridData) fFeedLinkInput.getLayoutData()).widthHint = entryFieldWidth; //Required to avoid large spanning dialog for long Links fFeedLinkInput.setFocus(); if (StringUtils.isSet(fInitialLink) && !fInitialLink.equals(URIUtils.HTTP)) { fFeedLinkInput.setText(fInitialLink); fFeedLinkInput.selectAll(); onLinkChange(); } else { fFeedLinkInput.setText(URIUtils.HTTP); fFeedLinkInput.setSelection(URIUtils.HTTP.length()); } fFeedLinkInput.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { getContainer().updateButtons(); onLinkChange(); } }); fLoadTitleFromFeedButton = new Button(textIndent, SWT.CHECK); fLoadTitleFromFeedButton.setText(Messages.FeedDefinitionPage_USE_TITLE_OF_FEED); fLoadTitleFromFeedButton.setSelection(loadTitleFromFeed); fLoadTitleFromFeedButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { getContainer().updateButtons(); } }); /* 2) Feed by Keyword */ fFeedByKeywordButton = new Button(container, SWT.RADIO); fFeedByKeywordButton.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false)); fFeedByKeywordButton.setText(Messages.FeedDefinitionPage_CREATE_KEYWORD_FEED); fFeedByKeywordButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { fKeywordInput.setEnabled(fFeedByKeywordButton.getSelection()); if (fKeywordInput.isEnabled()) hookKeywordAutocomplete(); fKeywordInput.setFocus(); getContainer().updateButtons(); } }); textIndent = new Composite(container, SWT.NONE); textIndent.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false)); textIndent.setLayout(new GridLayout(1, false)); ((GridLayout) textIndent.getLayout()).marginLeft = 10; fKeywordInput = new Text(textIndent, SWT.BORDER); OwlUI.makeAccessible(fKeywordInput, fFeedByKeywordButton); fKeywordInput.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false)); fKeywordInput.setEnabled(false); fKeywordInput.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { getContainer().updateButtons(); } }); /* Info Container */ Composite infoContainer = new Composite(container, SWT.None); infoContainer.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); infoContainer.setLayout(LayoutUtils.createGridLayout(2, 0, 5)); Label infoImg = new Label(infoContainer, SWT.NONE); infoImg.setImage(OwlUI.getImage(infoImg, "icons/obj16/info.gif")); //$NON-NLS-1$ infoImg.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false)); Link infoLink = new Link(infoContainer, SWT.NONE); infoLink.setText(Messages.FeedDefinitionPage_IMPORT_WIZARD_TIP); infoLink.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); infoLink.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { new ImportAction().openWizardForKeywordSearch(getShell()); } }); Dialog.applyDialogFont(container); setControl(container); } private void onLinkChange() { IBookMark existingBookMark = fExistingFeeds.get(fFeedLinkInput.getText()); if (existingBookMark != null) setMessage(NLS.bind(Messages.FeedDefinitionPage_BOOKMARK_EXISTS, existingBookMark.getName()), WARNING); else setMessage(Messages.FeedDefinitionPage_CREATE_BOOKMARK); } private void hookKeywordAutocomplete() { /* Only perform once */ if (fIsAutoCompleteKeywordHooked) return; fIsAutoCompleteKeywordHooked = true; final Pair<SimpleContentProposalProvider, ContentProposalAdapter> autoComplete = OwlUI .hookAutoComplete(fKeywordInput, null, true, false); /* Load proposals in the Background */ JobRunner.runInBackgroundThread(new Runnable() { public void run() { if (!fKeywordInput.isDisposed()) { Set<String> values = new TreeSet<String>(new Comparator<String>() { public int compare(String o1, String o2) { return o1.compareToIgnoreCase(o2); } }); values.addAll(DynamicDAO.getDAO(ICategoryDAO.class).loadAllNames()); Collection<ILabel> labels = DynamicDAO.getDAO(ILabelDAO.class).loadAll(); for (ILabel label : labels) { values.add(label.getName()); } /* Apply Proposals */ if (!fKeywordInput.isDisposed()) OwlUI.applyAutoCompleteProposals(values, autoComplete.getFirst(), autoComplete.getSecond(), false); } } }); } }