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package cometedgwt.auction.client;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.json.client.JSONArray;
import com.google.gwt.json.client.JSONNumber;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.Grid;
import com.google.gwt.user.client.ui.KeyboardListener;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;
import cometedgwt.auction.entity.AuctionItem;
/**
* Entry point classes define <code>onModuleLoad()</code>.
*/
public class App implements EntryPoint {
public static final String TOPIC = "bids";
private StreamingService streamingService;
private Map mapOfItemPrices = new HashMap();
private Map mapOfNumberOfBids = new HashMap();
//
//Ajax Push happens here!
//
private class BidCallback implements AsyncCallback {
public void onFailure(Throwable throwable) {
Window.alert(throwable.getMessage());
}
public void onSuccess(Object result) {
JSONObject resultObject = (JSONObject) result;
JSONArray resultArray = (JSONArray) resultObject.get("value");
JSONNumber itemId = (JSONNumber) resultArray.get(0);
JSONNumber itemPrice = (JSONNumber) resultArray.get(1);
JSONNumber numberOfBids = (JSONNumber) resultArray.get(2);
Integer itemKey = new Integer((int) itemId.getValue());
((Label) mapOfItemPrices.get(itemKey)).setText("$ " + itemPrice.toString());
((Label) mapOfNumberOfBids.get(itemKey)).setText("" + Double.valueOf(numberOfBids.toString()).intValue());
}
}
/**
* This is the entry point method.
*/
public void onModuleLoad() {
List itens = getAuctionItens();
Grid table = new Grid(itens.size() + 1, 6);
table.setStylePrimaryName("corpo");
table.setText(0, 0, "Item Name");
table.setText(0, 1, "# of bids");
table.setText(0, 2, "Price");
table.setText(0, 3, "My bid");
for (int i = 0; i < itens.size(); i++) {
final AuctionItem item = (AuctionItem) itens.get(i);
final int itemId = item.getId();
final Label labelNumberOfBids = new Label(String.valueOf(item.getNumberOfBids()));
final Label labelPrice = new Label("$ " + String.valueOf(item.getPrice()));
final TextBox txtBoxMyBid = new TextBox();
final Button bidButton = new Button("Bid!");
final Label labelMessage = new Label("");
bidButton.setStylePrimaryName("principal");
//Save itemPrice Label to be used when new bids are processed.
mapOfItemPrices.put(new Integer(itemId), labelPrice);
//Save numberOfBids Label to be used when new bids are processed.
mapOfNumberOfBids.put(new Integer(itemId), labelNumberOfBids);
//Handle ENTER key
txtBoxMyBid.addKeyboardListener(new KeyboardListener() {
public void onKeyUp(Widget sender, char keyCode, int modifiers) {
if (keyCode == '\r') {
sendNewBid(item, txtBoxMyBid, labelMessage);
}
}
public void onKeyDown(Widget sender, char keyCode, int modifiers) {
}
public void onKeyPress(Widget sender, char keyCode, int modifiers) {
}
});
//Handle button click
bidButton.addClickListener(new ClickListener() {
public void onClick(Widget sender) {
sendNewBid(item, txtBoxMyBid, labelMessage);
}
});
table.setText(i + 1, 0, item.getName());
table.setWidget(i + 1, 1, labelNumberOfBids);
table.setWidget(i + 1, 2, labelPrice);
table.setWidget(i + 1, 3, txtBoxMyBid);
table.setWidget(i + 1, 4, bidButton);
table.setWidget(i + 1, 5, labelMessage);
}
RootPanel.get("slot1").add(table);
streamingService = StreamingServiceGWTClientImpl.getInstance();
streamingService.subScribeToEvent(TOPIC, new BidCallback());
}
private List getAuctionItens() {
//TODO Get them from server side.
AuctionItem item1 = new AuctionItem(0, "???? Nokia N80", 100.0f);
AuctionItem item2 = new AuctionItem(1, "Laptop Apple PowerBook G4 17''", 1050.0f);
AuctionItem item3 = new AuctionItem(2, "Canon Rebel XT", 800.0f);
List itens = new ArrayList();
itens.add(item1);
itens.add(item2);
itens.add(item3);
return itens;
}
private void sendNewBid(AuctionItem item, TextBox myBid, Label message) {
int itemId = item.getId();
double lastBid = item.getPrice();
String newBid = myBid.getText();
double newBidValue = 0.0;
try {
newBidValue = Double.parseDouble(newBid);
} catch (NumberFormatException e) {
message.setText("Not a valid bid");
return;
}
if (newBidValue < lastBid) {
message.setText("Not a valid bid");
return;
}
message.setText("");
item.setPrice(newBidValue);
int numberOfBids = item.getNumberOfBids();
JSONArray array = new JSONArray();
array.set(0, new JSONNumber(itemId));
array.set(1, new JSONNumber(newBidValue));
array.set(2, new JSONNumber(numberOfBids));
JSONObject container = new JSONObject();
container.put("value", array);
streamingService.sendMessage(TOPIC, container);
myBid.setText("");
myBid.setFocus(true);
}
}