package com.smartgwt.sample.showcase.client.grid;

import com.google.gwt.user.client.Timer;
import com.smartgwt.client.data.DSRequest;
import com.smartgwt.client.data.DSResponse;
import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.data.Hilite;
import com.smartgwt.client.data.Criterion;
import com.smartgwt.client.data.Record;
import com.smartgwt.client.data.ResponseTransformer;
import com.smartgwt.client.widgets.IButton;
import com.smartgwt.client.types.ListGridFieldType;
import com.smartgwt.client.types.OperatorId;
import com.smartgwt.client.types.DSOperationType;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.Label;
import com.smartgwt.client.widgets.grid.ListGrid;
import com.smartgwt.client.widgets.grid.ListGridField;
import com.smartgwt.client.widgets.events.ClickEvent;
import com.smartgwt.client.widgets.events.ClickHandler;
import com.smartgwt.client.widgets.layout.VLayout;

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

public class FetchingVisibleOnlySample implements EntryPoint {

private Label outputFields;
 private ListGrid countryGrid;
 private VLayout vLayout;
 
 private class ServerCountLabel extends Label {
 private int count = 0; 
 
 public ServerCountLabel() { 
 setWidth(800);
 setHeight(40);
 setPadding(10);
 setBorder("1px solid grey");
 setContents("List of requested fields: NA");
 } 
 
 public void updateContent (String outputs, int totalRows, int startRow, int endRow) {
 count++;
 outputFields.setContents("Number of server trips: " + this.count + 
 " Total rows in this filter set: " + totalRows + 
 " Last range of records returned: " + startRow + " to " + endRow + 
 " Fields included in returned records: "+outputs+"");
 }
 }
 
 @Override
 public void onModuleLoad() {

vLayout = new VLayout();
        vLayout.setWidth(800);
        vLayout.setHeight(250);
        vLayout.setMembersMargin(10);
    	
        IButton highlightButton = new IButton();
        highlightButton.setAutoFit(true);
        highlightButton.setTitle("Highlight G8 Countries");
        highlightButton.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                countryGrid.destroy();
                recreateListGrid(true);
            }
        });
   
        outputFields = new ServerCountLabel();
    	    	
        vLayout.setMembers(highlightButton, outputFields);
    	
        recreateListGrid(false);

vLayout.draw();
    }

private void recreateListGrid (boolean includeHilites) {
        Hilite hilites[] = new Hilite[] {  
            new Hilite() {{  
                setFieldNames("countryName");  
                setCriteria(new Criterion("member_g8", OperatorId.EQUALS, true));  
                setCssText("background-color:#FFA07A;");  
            }}  
        };
        
        DataSource countryDS = DataSource.get("countryDS", null, new ResponseTransformer() {
            protected void transformResponse(DSResponse response, DSRequest request, Object data) {
                if(request.getOperationType() == DSOperationType.FETCH) {
                    int totalRows = response.getTotalRows(); 
                    int startRow = response.getStartRow(); 
                    int endRow = response.getEndRow(); 
                    String outouts = request.getOutputs();
                    ((ServerCountLabel) outputFields).updateContent(outouts, totalRows, startRow, endRow); 
                    outputFields.setBackgroundColor("#ffff77"); 
                    new Timer() { 
                        public void run() { 
                            outputFields.setBackgroundColor("#ffffff"); 
                        } 
                    }.schedule(500); 
                }
                defaultTransformResponse(response, request, data);
            }
        });
        
        countryGrid = new ListGrid() {
            public boolean canEditCell(int rowNum, int colNum) {
                Record record = countryGrid.getRecord(rowNum);
                String fieldName = countryGrid.getFieldName(colNum);
                if (fieldName.equals("countryCode") || (fieldName.equals("capital") && record.getAttribute("continent").equals("Europe"))) {
                    return false;
                }
                return true;
            };
    	    
        };
    	
        countryGrid.setWidth100();
        countryGrid.setHeight(300);
        countryGrid.setShowFilterEditor(true);
        countryGrid.setCanEditHilites(true);
        countryGrid.setAutoFetchData(true);
        countryGrid.setDataSource(countryDS);
    	
        ListGridField countryCode = new ListGridField("countryCode", "Flag");
        countryCode.setWidth(40);
        countryCode.setType(ListGridFieldType.IMAGE);
        countryCode.setImageURLPrefix("flags/16/");
        countryCode.setImageURLSuffix(".png");
        countryCode.setCanEdit(false);
        ListGridField countryName = new ListGridField("countryName");
        ListGridField capital = new ListGridField("capital");
        ListGridField population = new ListGridField("population", "Population");
        population.setHidden(true);
        ListGridField continent = new ListGridField("continent");
    	
        countryGrid.setDefaultFields(countryCode,countryName,capital,population);
        countryGrid.setFetchFields(continent);
    	
        if (includeHilites) countryGrid.setHilites(hilites);

vLayout.addMember(countryGrid, 1);
    }
    
    
}