Java tutorial
/* * Copyright 2012 Axel Winkler, Daniel Dunr * * This file is part of Daxplore Presenter. * * Daxplore Presenter is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 2.1 of the License, or * (at your option) any later version. * * Daxplore Presenter is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with Daxplore Presenter. If not, see <http://www.gnu.org/licenses/>. */ package org.daxplore.presenter.client.ui; import java.util.LinkedList; import java.util.List; import org.daxplore.presenter.client.event.EmbedSizeEvent; import org.daxplore.presenter.client.event.EmbedSizeHandler; import org.daxplore.presenter.client.event.ImageButtonEvent; import org.daxplore.presenter.client.event.ImageButtonHandler; import org.daxplore.presenter.client.event.QueryUpdateEvent; import org.daxplore.presenter.client.event.QueryUpdateHandler; import org.daxplore.presenter.client.resources.DaxploreConfig; import org.daxplore.presenter.client.resources.UITexts; import org.daxplore.presenter.shared.EmbedDefinition; import org.daxplore.presenter.shared.EmbedDefinition.EmbedFlag; import org.daxplore.presenter.shared.PrefixProperties; import org.daxplore.presenter.shared.QueryDefinition; import com.google.gwt.core.client.GWT; import com.google.gwt.event.dom.client.ChangeEvent; import com.google.gwt.event.dom.client.ChangeHandler; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.dom.client.MouseOverEvent; import com.google.gwt.event.dom.client.MouseOverHandler; import com.google.gwt.event.dom.client.MouseUpEvent; import com.google.gwt.event.dom.client.MouseUpHandler; import com.google.gwt.event.logical.shared.ValueChangeEvent; import com.google.gwt.event.logical.shared.ValueChangeHandler; import com.google.gwt.i18n.client.LocaleInfo; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.CheckBox; import com.google.gwt.user.client.ui.DisclosurePanel; import com.google.gwt.user.client.ui.FlowPanel; import com.google.gwt.user.client.ui.Frame; import com.google.gwt.user.client.ui.HorizontalPanel; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.PopupPanel; import com.google.gwt.user.client.ui.TextArea; import com.google.gwt.user.client.ui.VerticalPanel; import com.google.inject.Inject; import com.google.web.bindery.event.shared.EventBus; /** * A {@link PopupPanel} that is displayed when the user clicks the embed button * in the {@link ImageButtonPanel}. * * <p> * Popups are displayed on top of the rest of the page. * </p> * * <p> * This popup is used as a component of {@link ButtonWithPopup}. * </p> */ public class EmbedPopup extends PopupPanel implements EmbedSizeHandler, QueryUpdateHandler, ImageButtonHandler, MouseUpHandler, ChangeHandler, ValueChangeHandler<Boolean> { private DaxploreConfig config; private PrefixProperties prefixProperties; private VerticalPanel mainPanel; private Frame iframeSpot = new Frame(); private final TextArea linkTextArea; private String currentEmbedText = ""; private CheckBox transparencyCheckbox, legendCheckbox; private EmbedSize currentEmbedSize = EmbedSize.MEDIUM; private boolean needCodeUpdate = false; private QueryDefinition queryDefinition; /** * Instantiates a new embed popup panel. * * @param eventBus * the system's bus * @param uiTexts * the resource that supplies localized text to the UI * @param config * supplies configuration parameters to the client */ @Inject public EmbedPopup(final EventBus eventBus, UITexts uiTexts, DaxploreConfig config, PrefixProperties prefixProperties) { super(true); this.prefixProperties = prefixProperties; mainPanel = new VerticalPanel(); mainPanel.setSpacing(5); Label popupHeader = new Label(uiTexts.embedPopupTitle()); mainPanel.add(popupHeader); Label popupDescription = new Label(uiTexts.embedPopupDescription()); mainPanel.add(popupDescription); linkTextArea = new TextArea(); linkTextArea.setText(""); linkTextArea.addMouseOverHandler(new MouseOverHandler() { @Override public void onMouseOver(MouseOverEvent event) { linkTextArea.setFocus(true); linkTextArea.selectAll(); } }); linkTextArea.getElement().setAttribute("spellCheck", "false"); linkTextArea.addMouseUpHandler(this); linkTextArea.addChangeHandler(this); setStyleName("daxplore-EmbedPopup"); popupHeader.addStyleName("daxplore-EmbedPopup-header"); linkTextArea.addStyleName("daxplore-EmbedPopup-textarea"); mainPanel.add(linkTextArea); DisclosurePanel settingsPanel = new DisclosurePanel(uiTexts.embedSettingsHeader()); FlowPanel settingsContentPanel = new FlowPanel(); settingsPanel.add(settingsContentPanel); settingsPanel.setWidth("100%"); mainPanel.add(settingsPanel); HorizontalPanel sizeButtonPanel = new HorizontalPanel(); sizeButtonPanel.setSpacing(10); for (final EmbedSize embedSize : EmbedSize.values()) { Button button = new Button(embedSize.getButtonText(config, uiTexts)); button.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { eventBus.fireEvent(new EmbedSizeEvent(embedSize)); } }); sizeButtonPanel.add(button); } currentEmbedSize = EmbedSize.MEDIUM; settingsContentPanel.add(sizeButtonPanel); transparencyCheckbox = new CheckBox(uiTexts.embedTransparentBackground()); transparencyCheckbox.setValue(true, false); transparencyCheckbox.addValueChangeHandler(this); settingsContentPanel.add(transparencyCheckbox); legendCheckbox = new CheckBox(uiTexts.embedShowLegend()); legendCheckbox.setValue(true, false); legendCheckbox.addValueChangeHandler(this); settingsContentPanel.add(legendCheckbox); iframeSpot.setStyleName("daxplore-EmbedPopup-iframeSpot"); mainPanel.add(iframeSpot); setWidget(mainPanel); EmbedSizeEvent.register(eventBus, this); QueryUpdateEvent.register(eventBus, this); } /** * {@inheritDoc} */ @Override public void onEmbedSize(EmbedSizeEvent event) { currentEmbedSize = event.getEmbedSize(); updateEmbedCode(); } private void updateEmbedCode() { if (queryDefinition != null) { int width = currentEmbedSize.getWidth(config); int height = currentEmbedSize.getHeight(config); // get base address, e.g. http://127.0.0.1/p/myprefix String address = GWT.getHostPageBaseURL() + prefixProperties.getPrefix(); address += "?f=embed&q=" + queryDefinition.getAsString(); address += "&l=" + LocaleInfo.getCurrentLocale().getLocaleName(); if (!GWT.isScript() && Window.Location.getParameter("gwt.codesvr") != null) { address += "&gwt.codesvr=" + Window.Location.getParameter("gwt.codesvr"); } List<EmbedFlag> flags = new LinkedList<EmbedFlag>(); String transparency = ""; if (transparencyCheckbox.getValue()) { flags.add(EmbedFlag.TRANSPARENT); transparency = " allowtransparency=\"true\""; } if (legendCheckbox.getValue()) { flags.add(EmbedFlag.LEGEND); } EmbedDefinition embedDefinition = new EmbedDefinition(flags); address += "#" + embedDefinition.getAsString(); currentEmbedText = "<iframe src=\"" + address + "\" width=\"" + width + "\" height=\"" + height + "\" frameborder=\"0\"" + transparency + "></iframe>"; linkTextArea.setText(currentEmbedText); // temporary test code: mainPanel.remove(iframeSpot); iframeSpot = new Frame(); iframeSpot.setStyleName("daxplore-EmbedPopup-iframeSpot"); iframeSpot.setUrl("about:blank"); iframeSpot.setUrl(address); iframeSpot.getElement().setAttribute("frameborder", "0"); iframeSpot.getElement().setAttribute("style", "width:" + width + "px;" + "height:" + height + "px;"); if (transparencyCheckbox.getValue()) { iframeSpot.getElement().setAttribute("allowtransparency", "true"); iframeSpot.getElement().setAttribute("style", "width:" + width + "px;" + "height:" + height + "px"); } else { iframeSpot.getElement().setAttribute("style", "width:" + width + "px;" + "height:" + height + "px"); } mainPanel.add(iframeSpot); } } /** * {@inheritDoc} */ @Override public void onQueryUpdate(QueryUpdateEvent event) { queryDefinition = event.getQueryDefinition(); if (isVisible()) { updateEmbedCode(); } else { needCodeUpdate = true; } } /** * {@inheritDoc} */ @Override public void onImageButtonClick(ImageButtonEvent event) { if (needCodeUpdate) { updateEmbedCode(); needCodeUpdate = false; } } /** * {@inheritDoc} */ @Override public void onMouseUp(MouseUpEvent event) { if (event.getSource() == linkTextArea) { event.preventDefault(); linkTextArea.setFocus(true); linkTextArea.selectAll(); } } /** * {@inheritDoc} */ @Override public void onChange(ChangeEvent event) { if (event.getSource() == linkTextArea) { linkTextArea.setText(currentEmbedText); } } /** * {@inheritDoc} */ @Override public void onValueChange(ValueChangeEvent<Boolean> event) { updateEmbedCode(); } }