定制BlackBerry上面的Slider Bar

由于BB项目需要，特定制了Sliderbar，BB上没有这个组件，所以只能自己动手。

请看代码：

Java代码

package cc.mdev.seek;
import net.rim.device.api.math.Fixed32;
import net.rim.device.api.system.EncodedImage;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.TouchEvent;
import net.rim.device.api.ui.TouchGesture;
import net.rim.device.api.ui.component.BitmapField;
import net.rim.device.api.ui.component.GaugeField;
import net.rim.device.api.ui.container.HorizontalFieldManager;
/**
* Seekbar 可以拖动
*
* @author Wang XinFeng
* @site http://mdev.cc
*
*/
public
class SeekBar2 extends Field {
/**
* 水平滑動
*/
public
static
int HORIZONTAL_SLIDE = 0;
/**
* 垂直滑動
*/
public
static
int VERTICAL_SLIDE = 1;
/**
* 背景图片
*/
private EncodedImage background;
/**
* 整个Field的高宽度
*/
private
int width;
/**
* 整个Field的高度
*/
private
int height;
/**
* 可以拖动的Image
*/
private EncodedImage barImage = null;
/**
* x,y的坐标点
*/
private
int x = 0, y = 0;
/**
* 拖动时候的监听器
*/
private OnSlideListener listener = null;
/**
* 刻度的最大值
*/
private
int maxValue;
/**
* Seekbar
*
* @param width
* 宽度
* @param maxValue 刻度最大值
* @param barImage
* 可拖动的图片
* @param background
* 背景
* @param listener
* 监听器
*/
public SeekBar2(int width,int maxValue,EncodedImage barImage, EncodedImage background,
OnSlideListener listener) {
this(width, maxValue,barImage, background);
this.listener = listener;
}
/**
*
* @param width
* 宽度
* @param maxValue 刻度最大值
* @param barImage
* 可拖动的图片
* @param slideStlye
* 滑动方式垂直或者水平
* @param background
* 背景
*/
public SeekBar2(int width,int maxValue, EncodedImage barImage, EncodedImage background) {
super(FOCUSABLE);
this.width = width;
this.height = barImage.getHeight();
this.background = background.scaleImage32(Fixed32.div(background
.getWidth(), width + barImage.getWidth()), Fixed32.div(
background.getHeight(), height));
this.barImage = barImage;
this.maxValue = maxValue;
}
public
int getCurrentValue(){
return(this.x)/(width/maxValue);
}
/**
* 设置滑动监听器
*
* @param listener
*/
public
void setOnSlideListener(OnSlideListener listener) {
this.listener = listener;
}
protected
void layout(int width, int height) {
setExtent(this.background.getWidth(), this.height);
}
protected
void paint(Graphics graphics) {
graphics.drawImage(x, 0, width, height, barImage, 0, 0, 0);
}
protected
void paintBackground(Graphics arg0) {
arg0.drawImage(getPaddingLeft(), getPaddingTop(), this.background
.getWidth(), height, background, 0, 0, 0);
}
protected
boolean touchEvent(TouchEvent message) {
int e = message.getEvent();
// 聚焦时候点击处理
if (e == TouchEvent.CLICK && isFocus()) {
this.x = message.getX(1);
if (listener != null) {
listener.onStart();
}
if (this.x > this.width) {
this.x = width;
}
if (this.x < 0) {
this.x = 0;
}
System.out.println("SeekBar2.touchEvent()Click x is :" + this.x);
System.out.println("SeekBar2.touchEvent()getCurrentValue is :" + getCurrentValue());
this.invalidate();
return
true;
}
// 聚焦时候弹起处理
if (e == TouchEvent.UP && isFocus()) {
if (listener != null) {
listener.onEnd();
}
return
true;
}
// 聚焦时候移动处理
if (e == TouchEvent.MOVE && isFocus()) {
int x2 = message.getX(1);
this.x=x2;
if (this.x > this.width) {
this.x = width;
}
if (this.x < 0) {
this.x = 0;
}
System.out.println("SeekBar2.touchEvent()MOVE x is :" + this.x);
System.out.println("SeekBar2.touchEvent()getCurrentValue is :" + getCurrentValue());
this.invalidate();
if (listener != null) {
listener.onSlide();
}
return
true;
}
return
false;
}
public
static
int RGB2HEX(int r, int g, int b) {
return r << 16 | g << 8 << b;
}
// 禁用此方法，不讓系統畫出焦點
protected
void drawFocus(Graphics graphics, boolean on) {
}
/**
* 滑动监听器
*
* @author Wang XinFeng
*
*/
public
static
interface OnSlideListener {
/**
* 开始滑动
*/
public
void onStart();
/**
* 滑动中
*/
public
void onSlide();
/**
* 滑动结束
*/
public
void onEnd();
}
}

package cc.mdev.seek;import net.rim.device.api.math.Fixed32;import net.rim.device.api.system.EncodedImage;import net.rim.device.api.ui.Field;import net.rim.device.api.ui.Graphics;import net.rim.device.api.ui.TouchEvent;import net.rim.device.api.ui.TouchGesture;import net.rim.device.api.ui.component.BitmapField;import net.rim.device.api.ui.component.GaugeField;import net.rim.device.api.ui.container.HorizontalFieldManager;/** * Seekbar 可以拖动 * * @author Wang XinFeng * @site http://mdev.cc * */public class SeekBar2 extends Field { /** * 水平滑動 */ public static int HORIZONTAL_SLIDE = 0; /** * 垂直滑動 */ public static int VERTICAL_SLIDE = 1; /** * 背景图片 */ private EncodedImage background; /** * 整个Field的高宽度 */ private int width; /** * 整个Field的高度 */ private int height; /** * 可以拖动的Image */ private EncodedImage barImage = null; /** * x,y的坐标点 */ private int x = 0, y = 0; /** * 拖动时候的监听器 */ private OnSlideListener listener = null; /** * 刻度的最大值 */ private int maxValue; /** * Seekbar * * @param width * 宽度 * @param maxValue 刻度最大值 * @param barImage * 可拖动的图片 * @param background * 背景 * @param listener * 监听器 */ public SeekBar2(int width,int maxValue,EncodedImage barImage, EncodedImage background, OnSlideListener listener) { this(width, maxValue,barImage, background); this.listener = listener; } /** * * @param width * 宽度 * @param maxValue 刻度最大值 * @param barImage * 可拖动的图片 * @param slideStlye * 滑动方式垂直或者水平 * @param background * 背景 */ public SeekBar2(int width,int maxValue, EncodedImage barImage, EncodedImage background) { super(FOCUSABLE); this.width = width; this.height = barImage.getHeight(); this.background = background.scaleImage32(Fixed32.div(background .getWidth(), width + barImage.getWidth()), Fixed32.div( background.getHeight(), height)); this.barImage = barImage; this.maxValue = maxValue; } public int getCurrentValue(){ return(this.x)/(width/maxValue); } /** * 设置滑动监听器 * * @param listener */ public void setOnSlideListener(OnSlideListener listener) { this.listener = listener; } protected void layout(int width, int height) { setExtent(this.background.getWidth(), this.height); } protected void paint(Graphics graphics) { graphics.drawImage(x, 0, width, height, barImage, 0, 0, 0); } protected void paintBackground(Graphics arg0) { arg0.drawImage(getPaddingLeft(), getPaddingTop(), this.background .getWidth(), height, background, 0, 0, 0); } protected boolean touchEvent(TouchEvent message) { int e = message.getEvent(); // 聚焦时候点击处理 if (e == TouchEvent.CLICK && isFocus()) { this.x = message.getX(1); if (listener != null) { listener.onStart(); } if (this.x > this.width) { this.x = width; } if (this.x < 0) { this.x = 0; } System.out.println("SeekBar2.touchEvent()Click x is :" + this.x); System.out.println("SeekBar2.touchEvent()getCurrentValue is :" + getCurrentValue()); this.invalidate(); return true; } // 聚焦时候弹起处理 if (e == TouchEvent.UP && isFocus()) { if (listener != null) { listener.onEnd(); } return true; } // 聚焦时候移动处理 if (e == TouchEvent.MOVE && isFocus()) { int x2 = message.getX(1); this.x=x2; if (this.x > this.width) { this.x = width; } if (this.x < 0) { this.x = 0; } System.out.println("SeekBar2.touchEvent()MOVE x is :" + this.x); System.out.println("SeekBar2.touchEvent()getCurrentValue is :" + getCurrentValue()); this.invalidate(); if (listener != null) { listener.onSlide(); } return true; } return false; } public static int RGB2HEX(int r, int g, int b) { return r << 16 | g << 8 << b; } // 禁用此方法，不讓系統畫出焦點 protected void drawFocus(Graphics graphics, boolean on) { } /** * 滑动监听器 * * @author Wang XinFeng * */ public static interface OnSlideListener { /** * 开始滑动 */ public void onStart(); /** * 滑动中 */ public void onSlide(); /** * 滑动结束 */ public void onEnd(); }}
此段代码只设置了横向滚动，纵向的并没有设置。

请看运行截图：

本文转自www.35java.com

posted on 2011-01-03 19:22 老男孩咖啡阅读(172) 评论(0) 收藏举报

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