package org.kuali.student.common.ui.client.widgets.headers;

 import org.kuali.student.common.ui.client.configurable.mvc.LayoutController;

 import org.kuali.student.common.ui.client.mvc.Callback;

 import org.kuali.student.common.ui.client.mvc.Controller;

 import org.kuali.student.common.ui.client.util.ExportUtils;

 import org.kuali.student.common.ui.client.util.PrintUtils;

 import org.kuali.student.common.ui.client.widgets.ApplicationPanel;

 import org.kuali.student.common.ui.client.widgets.dialog.ReportExportDialog;

 import org.kuali.student.common.ui.client.widgets.field.layout.element.SpanPanel;

 import com.google.gwt.core.client.GWT;

 import com.google.gwt.event.dom.client.ClickEvent;

 import com.google.gwt.event.dom.client.ClickHandler;

 import com.google.gwt.uibinder.client.UiBinder;

 import com.google.gwt.uibinder.client.UiField;

 import com.google.gwt.user.client.ui.Composite;

 import com.google.gwt.user.client.ui.HTML;

 import com.google.gwt.user.client.ui.Image;

 import com.google.gwt.user.client.ui.Widget;

 public class KSDocumentHeader extends Composite {

     private static KSDocumentHeaderUiBinder uiBinder = GWT.create(KSDocumentHeaderUiBinder.class);

     private ReportExportDialog exportDialog = null;

     interface KSDocumentHeaderUiBinder extends UiBinder<Widget, KSDocumentHeader> {}

     @UiField

     HTML headerHTML;

     @UiField

     HTML infoLabel;

     @UiField

     SpanPanel widgetPanel;

     @UiField

     Image printImage;

     @UiField

     Image exportImage;

     private Widget printContent = null;  // Widget to be printed. 

     private boolean hasSeparator = true;

     public KSDocumentHeader() {

         initWidget(uiBinder.createAndBindUi(this));

         setupPrint();

         setupExportPrint();

     }

     public KSDocumentHeader(boolean hasContentWidgetSeparator) {

         this.hasSeparator = hasContentWidgetSeparator;

         initWidget(uiBinder.createAndBindUi(this));

         setupPrint();

         setupExportPrint();

     }

     /**

      * returns the widget that will be printed

      * 

      * @return

      */

     public Widget getPrintContent(){

             return this.printContent;

     }

     /**

      * Takes a widget to be printed. This is useful when you want to 

      * print only a certain section of a page

      * 

      * @param pContent

      */

     public void setPrintContent(Widget pContent){

             this.printContent = pContent;

     }

     private void setupPrint() {

             // Default to the old way of printing the entire page

             if(this.printContent == null){

                     this.setPrintContent(ApplicationPanel.get().getWidget(0));

             }

         printImage.setVisible(false);

         printImage.addClickHandler(new ClickHandler() {

             @Override

             public void onClick(ClickEvent event) {

                 PrintUtils.print(getPrintContent());

             }

         });

     }

     private void setupExportPrint() {

         exportDialog = new ReportExportDialog();

         exportImage.setVisible(false);

         exportImage.addClickHandler(new ClickHandler() {

             @Override

             public void onClick(ClickEvent event) {

                 if (exportDialog != null) {

                     exportDialog.show();

                 }

             }

         });

         exportDialog.addSelectCompleteCallback(new Callback<String>() {

             @Override

             public void exec(String format) {

                 Controller currController = ExportUtils.getController(KSDocumentHeader.this);

                 String title = null;

                 if (currController instanceof LayoutController) {

                     title = ((LayoutController) currController).getName();

                 }

                 ExportUtils.handleExportClickEvent(currController, format, title);

             }

         });

     }

     public void setTitle(String header) {

         headerHTML.setHTML("<h2>" + header + "</h2>");

     }

     public void addWidget(Widget w) {

         if (w != null) {

             if (hasSeparator) {

                 if (widgetPanel.getElement().hasChildNodes()) {

                     widgetPanel.add(new HTML("<span style='float: left; margin-left: .7em; margin-right: .7em'>|</span>"));

                 }

             }

             widgetPanel.add(w);

         }

         w.getElement().setAttribute("style", "float: left");

     }

     public HTML getInfoLabel() {

         return infoLabel;

     }

     public void showPrint(boolean show) {

         printImage.setVisible(true);

     }

     /**

      * This method set the visibility of the export button to the value of the parameter

      * 

      * @param show

      */

     public void showExport(boolean show) {

             exportImage.setVisible(show);

     }

     public Image getExportImage() {

         return exportImage;

     }

 }