// MarketDataModel.java
// A custom table model for use with the MYOSM enviornment.
//
import javax.swing.table.*;
import javax.swing.*;
public class MarketDataModel extends AbstractTableModel
implements Runnable {
Thread runner;
MYOSM market;
int delay;
public MarketDataModel(int initialDelay) {
market = new MYOSM();
delay = initialDelay * 1000;
Thread runner = new Thread(this);
runner.start();
}
Stock[] stocks = new Stock[0];
int[] stockIndices = new int[0];
String[] headers = {"Symbol", "Price", "Change", "Last updated"};
public int getRowCount() { return stocks.length; }
public int getColumnCount() { return headers.length; }
public String getColumnName(int c) { return headers[c]; }
public Object getValueAt(int r, int c) {
switch(c) {
case 0:
return stocks[r].symbol;
case 1:
return new Double(stocks[r].price);
case 2:
return new Double(stocks[r].delta);
case 3:
return stocks[r].lastUpdate;
}
throw new IllegalArgumentException("Bad cell (" + r + ", " + c +")");
}
public void setDelay(int seconds) { delay = seconds * 1000; }
public void setStocks(int[] indices) {
stockIndices = indices;
updateStocks();
fireTableDataChanged();
}
public void updateStocks() {
stocks = new Stock[stockIndices.length];
for (int i = 0; i < stocks.length; i++) {
stocks[i] = market.getQuote(stockIndices[i]);
}
}
public void run() {
while(true) {
// Blind update . . . we could check for real deltas if necessary
updateStocks();
// We know there are no new columns, so don't fire a data change, only
// fire a row update . . . this keeps the table from flashing
fireTableRowsUpdated(0, stocks.length - 1);
try { Thread.sleep(delay); }
catch(InterruptedException ie) {}
}
}
}
|