Blackberry JAVA DEVELOPMENT ENVIRONMENT - - CRYPTOGRAPHIC SMART CARD DRIVER - DEVELOPMENT GUIDE Průvodce řešením problémů stáhnout pdf (Strana 34)

BlackBerry Java Development Environment Development Guide

Code sample: Creating a custom list

Example: SampleListFieldCallback.java

/**

* SampleListFieldCallback.java

package com.rim.samples.docs.listfields;

import java.util.*;

import net.rim.device.api.system.*;

import net.rim.device.api.ui.*;

import net.rim.device.api.ui.component.*;

import net.rim.device.api.ui.container.*;

public class SampleListFieldCallback extends UiApplication {

private ListField myList;

public static void main(String[] args) {

SampleListFieldCallback app = new SampleListFieldCallback();

app.enterEventDispatcher();

}

private static class ListCallback implements ListFieldCallback {

private Vector listElements = new Vector();

public void drawListRow(

ListField list, Graphics g, int index, int y, int w) {

String text = (String)listElements.elementAt(index);

g.drawText(text, 0, y, 0, w);

}

public Object get(ListField list, int index) {

return listElements.elementAt(index);

}

public int indexOfList(ListField list, String p, int s) {

return listElements.indexOf(p, s);

}

public int getPreferredWidth(ListField list) {

return Graphics.getScreenWidth();

}

public void insert(String toInsert, int index) {

listElements.addElement(toInsert);

}

public void erase() {

listElements.removeAllElements();

}

public SampleListFieldCallback() {

MainScreen mainScreen = new MainScreen();

myList = new ListField();

ListCallback myCallback = new ListCallback();

myList.setCallback(myCallback);

String fieldOne = “ListField one”;

String fieldTwo = “ListField two”;

String fieldThree = “ListField three”;

myList.insert(0);

myCallback.insert(fieldOne, 0);

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