package org.demo.custon_view; 
 
import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.Canvas; 
import android.graphics.Matrix; 
import android.graphics.Paint; 
import android.util.AttributeSet; 
import android.view.MotionEvent; 
import android.view.View; 
import android.widget.ImageView; 
 
/** 
 * @Title: SquaredPassWord.java 
 * @Description: 九宮格密碼 
 * @author lhz 
 * @date 2013年9月16日 下午3:48:10 
 * @version V1.0 Copyright (c) 2013 Company,Inc. All Rights Reserved. 
 * 
 */ 
public class SquaredPassWord extends View { 
 ImageView i; 
 private int length;// 九宮格密碼是正方形所以只要知道邊長(zhǎng)就可以 
 private Point[] points = new Point[9];// 九宮格節(jié)點(diǎn) 
 private Bitmap defualtPointMap = BitmapFactory.decodeResource(getResources(), R.drawable.locus_round_original);// 正常情況下點(diǎn)的位圖 
 private int poitleght = defualtPointMap.getWidth();// 節(jié)點(diǎn)的邊長(zhǎng)；這里值考慮正方形狀態(tài) 
 private Bitmap selectPointMap = BitmapFactory.decodeResource(getResources(), R.drawable.locus_round_click);// 選中情況下點(diǎn)的位圖 
 private Point startPoint;// 起點(diǎn) 
 private Point tempPoint;// 臨時(shí)存儲(chǔ)上一個(gè)節(jié)點(diǎn) 
 private StringBuffer passWBuffer = new StringBuffer();// 保存軌跡順序的密碼 
 private Bitmap lineBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.locus_line); 
 private int lineBitmapheight = lineBitmap.getHeight(); 
 private double lineBitmapWidth = lineBitmap.getWidth(); 
 // 以下四個(gè)變量是為了繪制最后一個(gè)跟手指之間的連線 
 private int startX;// 移動(dòng)起點(diǎn)X 
 private int startY;// 移動(dòng)起點(diǎn)Y 
 private int moveX;// 正在移動(dòng)的X 
 private int moveY;// 正在移動(dòng)的Y 
 
 public SquaredPassWord(Context context) { 
  super(context); 
 
 } 
 
 public SquaredPassWord(Context context, AttributeSet attrs) { 
  super(context, attrs); 
 
 } 
 
 public SquaredPassWord(Context context, AttributeSet attrs, int defStyle) { 
  super(context, attrs, defStyle); 
 
 } 
 
 @Override 
 public boolean onTouchEvent(MotionEvent event) { 
  boolean flag = true; 
  switch (event.getAction()) { 
  case MotionEvent.ACTION_DOWN: 
   passWBuffer.delete(0, passWBuffer.length()); 
   int x = (int) event.getX(); 
   int y = (int) event.getY(); 
   for (Point point : points) { 
    if (point.isInMyArea(x, y)) { 
     point.setSelected(true); 
     tempPoint = startPoint = point; 
     startX = startPoint.getCenterX(); 
     startY = startPoint.getCenterY(); 
     passWBuffer.append(startPoint.getId()); 
    } 
   } 
   invalidate(); 
   break; 
  case MotionEvent.ACTION_MOVE: 
   moveX = (int) event.getX(); 
   moveY = (int) event.getY(); 
   for (Point point : points) { 
    if (point.isInMyArea(moveX, moveY) && !point.isSelected()) { 
     tempPoint.setNextID(point.getId()); 
     point.setSelected(true); 
     tempPoint = point; 
     startX = tempPoint.getCenterX(); 
     startY = tempPoint.getCenterY(); 
     passWBuffer.append(tempPoint.getId()); 
    } 
   } 
   invalidate(); 
   break; 
  case MotionEvent.ACTION_UP: 
   reSetData(); 
   startX = startY = moveX = moveY = 0; 
   invalidate(); 
   flag = false; 
   break; 
 
  default: 
   break; 
  } 
  return flag; 
 } 
 
 /** 
  * 回復(fù)各個(gè)點(diǎn)到初始狀態(tài) 
  */ 
 private void reSetData() { 
  for (Point point : points) { 
   point.setSelected(false); 
   point.setNextID(point.getId()); 
  } 
 } 
 
 @Override 
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
  // TODO Auto-generated method stub 
  int width = getWidth() - getPaddingLeft() - getPaddingRight(); 
  int height = getHeight() - getPaddingTop() - getPaddingBottom(); 
  length = (width < height ? width : height);// 獲取邊長(zhǎng) 
  if(!(length>0)){ 
    
  } 
  System.out.println(length); 
  initPionts(points); 
  super.onMeasure(widthMeasureSpec, heightMeasureSpec); 
 } 
 
 @Override 
 protected void onDraw(Canvas canvas) { 
  // TODO Auto-generated method stub 
  if (moveX != 0 && moveY != 0 && startX != 0 && startY != 0) { 
   // 繪制當(dāng)前活動(dòng)的線段 
   drawLine(startX, startY, moveX, moveY, canvas); 
  } 
  drawLinePoint(canvas); 
  super.onDraw(canvas); 
 } 
 
 /** 
  * 初始各節(jié)點(diǎn) 
  * 
  * @param pionts 
  */ 
 @SuppressWarnings("null") 
 private void initPionts(Point[] points) { 
  int spacing = (length - poitleght * 3) / 2; 
 
  if (points == null && points.length != 9) {// 只做九宮格的處理 
   return; 
  } else { 
   for (int i = 0; i < 9; i++) { 
    int row = i / 3;// 行數(shù) 
    int column = i % 3;// 列數(shù)；求整取余 
 
    int x = (poitleght + spacing) * column + getPaddingLeft();// x坐標(biāo) 
    int y = (poitleght + spacing) * row + getPaddingTop();// y坐標(biāo) 
    Point point = new Point((i + 1), x, y, poitleght); 
    points[i] = point; 
   } 
  } 
 } 
 
 /** 
  * 繪制各節(jié)點(diǎn)以及被選擇的個(gè)節(jié)點(diǎn)之間的連線軌跡 
  * 
  * @param canvas 
  */ 
 private void drawLinePoint(Canvas canvas) { 
  if (startPoint != null) { 
   drawP2POrbit(startPoint, canvas); 
  } 
  Paint paint = null;// new Paint(); 
  // 繪制每個(gè)點(diǎn)的圖片 
  for (Point point : points) { 
   if (point.isSelected()) {// 繪制大圈 
    canvas.drawBitmap(selectPointMap, point.getX(), point.getY(), paint); 
   } else { 
    canvas.drawBitmap(defualtPointMap, point.getX(), point.getY(), paint); 
   } 
  } 
 } 
 
 /** 
  * 繪制點(diǎn)與點(diǎn)之間的軌跡 
  * 
  * @param canvas 
  */ 
 private void drawP2POrbit(Point point, Canvas canvas) { 
  if (point.getId() != point.nextID) { 
   // canvas.concat(matrix); 
   Point endPoint = null; 
   // 獲取目標(biāo)節(jié)點(diǎn) 
   for (Point point3 : points) { 
    if (point3.getId() == point.getNextID()) { 
     endPoint = point3; 
     break; 
    } 
   } 
   if (endPoint != null) { 
    // 畫線 
    drawLine(point.getCenterX(), point.getCenterY(), endPoint.getCenterX(), endPoint.getCenterY(), canvas); 
    // 遞歸 
    drawP2POrbit(endPoint, canvas); 
   } 
  } 
 } 
 
 /** 
  * 畫連線 
  * 
  * @param startX 
  *   起點(diǎn)X 
  * @param startY 
  *   起點(diǎn)Y 
  * @param stopX 
  *   終點(diǎn)X 
  * @param stopY 
  *   終點(diǎn)Y 
  * @param canvas 
  */ 
 private void drawLine(int startX, int startY, int stopX, int stopY, Canvas canvas) { 
  Paint paint = new Paint(); 
  // 獲得斜邊長(zhǎng)度 
  double hypotenuse = Math.hypot((stopX - startX), (stopY - startY)); 
  // double side = stopX - startX;// 鄰邊 
  // double piAngle = Math.acos(side / hypotenuse);// pi角度 
  // float rotate = (float) (180 / Math.PI * piAngle);// 轉(zhuǎn)換的角度 
  float rotate = getDegrees(startX, startY, stopX, stopY); 
  Matrix matrix = new Matrix(); 
  // matrix.postRotate(rotate);//不能用這個(gè)matritx 來選擇角度只能用 讓canvas懶選擇 
    // 用matrix的話會(huì)引起圖片所表示的線條不在中心點(diǎn)上 
    canvas.rotate(rotate, startX, startY); 
  matrix.preTranslate(0, 0); 
  matrix.setScale((float) (hypotenuse / lineBitmapWidth), 1.0f); 
  matrix.postTranslate(startX, startY - lineBitmapheight / 2.f); 
  canvas.drawBitmap(lineBitmap, matrix, paint); 
  canvas.rotate(-rotate, startX, startY);//恢復(fù) 
  canvas.save(); 
 
//  Paint paint1 = new Paint(); 
//  paint1.setColor(Color.BLACK); 
//  paint1.setStrokeWidth(8);// 粗細(xì) 
//  paint1.setFlags(Paint.ANTI_ALIAS_FLAG); 
//  canvas.drawLine(startX, startY, stopX, stopY, paint1); 
 
 } 
 
 /** 
  * 獲取角度 
  * 
  * @param startX 
  *   起點(diǎn)X 
  * @param startY 
  *   起點(diǎn)Y 
  * @param stopX 
  *   終點(diǎn)X 
  * @param stopY 
  *   終點(diǎn)Y 
  */ 
 private float getDegrees(int startX, int startY, int stopX, int stopY) { 
  // 獲得斜邊長(zhǎng)度 
  double hypotenuse = Math.hypot((stopX - startX), (stopY - startY)); 
  double side = stopX - startX;// 鄰邊 
  double piAngle = Math.acos(side / hypotenuse);// pi角度 
  float rotate = (float) (180 / Math.PI * piAngle);// 轉(zhuǎn)換的角度（0--180); 
  if (stopY - startY < 0) {// 如果Y愁小于0說明角度在第三或者第四像限 
   rotate = 360 - rotate; 
  } 
  return rotate; 
 } 
 
 /** 
  * 軌跡順序密碼 
  * 
  * @return 
  */ 
 public String getOrbitString() { 
  return (passWBuffer == null ? null : passWBuffer.toString()); 
 } 
 
 /** 
  * 表示一個(gè)點(diǎn) 
  * 
  * @author lanhaizhong 
  * 
  */ 
 class Point { 
 
  private int id;// 點(diǎn)的id 
  private int nextID;// 連向下一個(gè)借點(diǎn)的id 
  private int x;// 點(diǎn)的左上角x坐標(biāo) 
  private int y;// 點(diǎn)的左上角的y坐標(biāo) 
  private boolean isSelected;// 該節(jié)點(diǎn)是否被選中 
  private int width;// 點(diǎn)的長(zhǎng)度 這里只考慮正方形 
 
  public Point() { 
   super(); 
   // TODO Auto-generated constructor stub 
  } 
 
  public int getId() { 
   return id; 
  } 
 
  public void setId(int id) { 
   this.id = id; 
  } 
 
  public int getNextID() { 
   return nextID; 
  } 
 
  public void setNextID(int nextID) { 
   this.nextID = nextID; 
  } 
 
  public int getX() { 
   return x; 
  } 
 
  public void setX(int x) { 
   this.x = x; 
  } 
 
  public int getY() { 
   return y; 
  } 
 
  public void setY(int y) { 
   this.y = y; 
  } 
 
  public boolean isSelected() { 
   return isSelected; 
  } 
 
  public void setSelected(boolean isSelected) { 
   this.isSelected = isSelected; 
  } 
 
  public int getWidth() { 
   return width; 
  } 
 
  public void setWidth(int width) { 
   this.width = width; 
  } 
 
  public Point(int id, int x, int y, int width) { 
   super(); 
   this.id = id; 
   this.x = x; 
   this.y = y; 
   this.nextID = id; 
   this.isSelected = false; 
   this.width = width; 
  } 
 
  public int getCenterX() { 
   return x + (width / 2); 
  } 
 
  private int getCenterY() { 
   return y + (width / 2); 
  } 
 
  /** 
   * 判斷某個(gè)坐標(biāo)是否這個(gè)這個(gè)表示一個(gè)點(diǎn)的圖形區(qū)域內(nèi) 
   * 
   * @param x 
   * @param y 
   * @return 
   */ 
  public boolean isInMyArea(int x, int y) { 
 
   // return (this.x < x && x < (this.x + width)) && (this.y < y && y < 
   // (this.y + width)); 
   return ((this.getCenterX() - lineBitmapWidth / 2) < x && x < (this.getCenterX() + lineBitmapWidth / 2)) 
     && ((this.getCenterY() - lineBitmapWidth / 2) < y && y < (this.getCenterY() + lineBitmapWidth / 2)); 
  } 
 } 
}