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102 lines
2.7 KiB
Java
102 lines
2.7 KiB
Java
package org.gcube.portlets.user.newsfeed.client.ui;
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import com.google.gwt.core.shared.GWT;
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import com.google.gwt.dom.client.Style.Unit;
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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.user.client.Window;
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import com.google.gwt.user.client.ui.Anchor;
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import com.google.gwt.user.client.ui.FlowPanel;
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import com.google.gwt.user.client.ui.SimplePanel;
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import com.google.gwt.user.client.ui.Widget;
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import com.google.gwt.user.client.ui.WidgetCollection;
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/**
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* This panel will contain the attachments/previews
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* @author Massimiliano Assante at ISTI CNR
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* @author Costantino Perciante at ISTI CNR
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*
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*/
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public class Placeholder extends FlowPanel {
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private static final String SHOW_OTHER_ATTACHMENTS_LABEL = "Show All";
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// check if we need to show more attachments
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private boolean appendShowMoreLabel;
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/**
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* Modified version of the add method.
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*/
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public void add(AttachmentPreviewer atPrev){
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// retrieve the list of children
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WidgetCollection listOfChildren = this.getChildren();
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// check the size
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int size = listOfChildren.size();
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// look at NewsFeed.css ...
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if(Window.getClientWidth() <= 1128){
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add((Widget)atPrev);
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atPrev.changeAttachmentWidth(92, Unit.PCT);
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}
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else if(size % 2 == 0){
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// in this case the next attachment we are going to add remains with the same width
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add((Widget)atPrev);
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GWT.log("added without changing size");
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}
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else{
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// we need to change the length of the last element added and of this new one
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((AttachmentPreviewer) listOfChildren.get(size -1)).changeAttachmentWidth(45, Unit.PCT);
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atPrev.changeAttachmentWidth(45, Unit.PCT);
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// add it finally
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add((Widget)atPrev);
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}
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if(size >= 4){
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// ok, we are going to add the 5th attachment and so forth but we hide them..
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atPrev.setVisible(false);
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// remember to add the button to let the user show them later
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appendShowMoreLabel = true;
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}
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}
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/**
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* Append "Show All" label to the post template.
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*/
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public void appendShowMoreLabel(){
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if(appendShowMoreLabel){
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final WidgetCollection listOfChildren = this.getChildren();
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final SimplePanel sp = new SimplePanel();
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sp.setStyleName("centered");
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final Anchor showMoreAttachments = new Anchor(SHOW_OTHER_ATTACHMENTS_LABEL);
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showMoreAttachments.setTitle("Show all the attached files");
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showMoreAttachments.setStyleName("link");
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sp.add(showMoreAttachments);
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showMoreAttachments.addClickHandler(new ClickHandler() {
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@Override
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public void onClick(ClickEvent event) {
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// retrieve the list of attachmentPreviewers and show them
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for(Widget w: listOfChildren){
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w.setVisible(true);
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}
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sp.setVisible(false);
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}
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});
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// show the panel
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this.add(sp);
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}
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}
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}
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