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

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.ResultSet;
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.smartgwt.client.widgets.layout.HLayout;

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

public class SpreadsheetFilteringSample implements EntryPoint {

private Label serverCountLabel;
 private ListGrid supplyGrid;
 private HLayout mainLayout;
 private VLayout leftVLayout;
 
 private class ServerCountLabel extends Label {
 private int count = 0; 
 
 public ServerCountLabel() { 
 setWidth100();
 setHeight(40);
 setPadding(10);
 setBorder("1px solid grey");
 setContents("Number of server trips: 0");
 } 
 
 public void updateContent (String dataSource, int totalRows, int startRow, int endRow) {
 count++;
 serverCountLabel.setContents("Number of server trips: " + this.count + 
 " DataSource: \"" + dataSource + "\"" +
 " Total rows in this filter set: " + totalRows + 
 " Last range of records returned: " + startRow + " to " + endRow );
 }
 } 
 
 private DataSource supplyItemDS = DataSource.get("supplyItem", 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(); 
 ((ServerCountLabel) serverCountLabel).updateContent(supplyItemDS.getID(), totalRows, startRow, endRow); 
 serverCountLabel.setBackgroundColor("#ffff77"); 
 new Timer() { 
 public void run() { 
 serverCountLabel.setBackgroundColor("#ffffff"); 
 } 
 }.schedule(500); 
 }
 defaultTransformResponse(response, request, data);
 }
 });
 
 @Override
 public void onModuleLoad() {
 
 leftVLayout = new VLayout();
 leftVLayout.setMembersMargin(20);
 
 mainLayout = new HLayout();
 mainLayout.setWidth100();
 mainLayout.setHeight100(); 
 mainLayout.setMembersMargin(20);
 	
 VLayout rightVLayout = new VLayout();
 rightVLayout.setMembersMargin(20);
 
 IButton fetchUnloadedRecordsButton = new IButton();
 fetchUnloadedRecordsButton.setWidth(200);
 fetchUnloadedRecordsButton.setTitle("Fetch Unloaded Records");
 fetchUnloadedRecordsButton.addClickHandler(new ClickHandler() {
 @Override
 public void onClick(ClickEvent event) {
 ResultSet rest = supplyGrid.getResultSet();
 if (!rest.rangeIsLoaded(0, rest.getLength())) {
 // getRange will fetch the requested rows from the server
 rest.getRange(0, rest.getLength());
 }
 }
 });
 IButton recreateGridButton = new IButton();
 recreateGridButton.setWidth(200);
 recreateGridButton.setTitle("Recreate Grid");
 recreateGridButton.addClickHandler(new ClickHandler() {
 @Override
 public void onClick(ClickEvent event) {
 (leftVLayout.getMember(0)).destroy();
 createGrid();
 }
 });
 
 serverCountLabel = new ServerCountLabel();
 
 leftVLayout.setMembers(serverCountLabel);
 rightVLayout.setMembers(fetchUnloadedRecordsButton, recreateGridButton);
 	
 mainLayout.setMembers(leftVLayout, rightVLayout);
 
 createGrid();

mainLayout.draw();
    }

private void createGrid () {
        supplyGrid = new ListGrid();    	
        supplyGrid.setWidth100();
        supplyGrid.setHeight(300);
        supplyGrid.setShowFilterEditor(true);
        supplyGrid.setFilterOnKeypress(true);
        supplyGrid.setFetchDelay(500);
        supplyGrid.setAutoFetchData(true);
        supplyGrid.setDataSource(DataSource.get("supplyItem"));
    	
        ListGridField SKU = new ListGridField("SKU");
        ListGridField itemName = new ListGridField("itemName");
        ListGridField category = new ListGridField("category");
        ListGridField units = new ListGridField("units");
    	
        supplyGrid.setFields(SKU,itemName,category,units);
    	
        leftVLayout.addMember(supplyGrid, 0);
    }
    
    
    
}