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