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114 lines
2.8 KiB
Java
114 lines
2.8 KiB
Java
package org.gcube.portlets.user.newsfeed.client.ui;
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import org.gcube.portlets.widgets.imagepreviewerwidget.client.ui.Carousel;
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import com.google.gwt.core.client.GWT;
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import com.google.gwt.dom.client.Style.Cursor;
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import com.google.gwt.event.dom.client.ClickEvent;
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import com.google.gwt.event.dom.client.ClickHandler;
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import com.google.gwt.uibinder.client.UiBinder;
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import com.google.gwt.uibinder.client.UiField;
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import com.google.gwt.user.client.ui.Composite;
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import com.google.gwt.user.client.ui.HTML;
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import com.google.gwt.user.client.ui.Image;
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import com.google.gwt.user.client.ui.Widget;
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/**
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* Link Previewer class to show a link a preview.
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* @author Costantino Perciante at ISTI-CNR
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* @author Massimiliano Assante at ISTI-CNR
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*/
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public class LinkPreviewer extends Composite {
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// is the preview image still there ?
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private boolean imageRemoved = false;
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@UiField
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HTML titleArea;
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@UiField
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HTML urlText;
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@UiField
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HTML descText;
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@UiField
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Image image;
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// saved file name
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private final String fileName;
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private static LinkPreviewUiBinder uiBinder = GWT
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.create(LinkPreviewUiBinder.class);
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interface LinkPreviewUiBinder extends UiBinder<Widget, LinkPreviewer> {
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}
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public LinkPreviewer(String title, String titleDesc, String host, String linkThumbUrl, String url) {
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initWidget(uiBinder.createAndBindUi(this));
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if (linkThumbUrl == null || linkThumbUrl.equals("null")){
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image.removeFromParent();
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imageRemoved = true;
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}
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else {
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image.setUrl(linkThumbUrl);
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image.setWidth("80px");
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}
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// save the filename info
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fileName = title;
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titleArea.setHTML("<a class=\"link\" target=\"_blank\" href=\"" + url + "\">"+title+"</a> <span style=\"color: #333;\"> - " + host+ "</span>");
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urlText.setHTML((url.length() > 70) ? url.substring(0, 70)+"..." : url);
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String desc = titleDesc;
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descText.setHTML((desc.length() > 256) ? desc.substring(0, 256)+"..." : desc);
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}
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/**
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* Open the carousel when the user clicks on the preview's image.
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* @param carousel
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*/
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public void onImageClickOpenCarousel(final Carousel carousel) {
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if(imageRemoved)
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return;
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// change cursor type on hover
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image.getElement().getStyle().setCursor(Cursor.POINTER);
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// add handler
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image.addClickHandler(new ClickHandler() {
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@Override
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public void onClick(ClickEvent event) {
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carousel.show();
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}
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});
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}
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/**
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* Open the carousel when the user clicks on the previews' file name.
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* @param carousel
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*/
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public void onFileNameClickOpenCarousel(final Carousel carousel) {
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String nameToShow = fileName.length() > 40 ? fileName.substring(0, 40) + "..." : fileName;
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titleArea.setHTML("<a class=\"link\" >"+ nameToShow +"</a>");
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titleArea.setTitle(fileName);
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titleArea.addClickHandler(new ClickHandler() {
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@Override
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public void onClick(ClickEvent event) {
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carousel.show();
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}
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});
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}
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}
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