그리기 관련 멀티터치 관련 질문요...

Question

밑에 소스는 제가 api가지고 만든 소스입니다.

여기서 손날이나 특정 영역을 무시 하고 펜으로 그릴때만 그리기를 하고 싶은데 도통 이리저리

터치 좌표점을 수정해도 이상하게 되서 이렇게 질문드립니다...ㅜㅜㅜ

도와주시면 감사하겠습니다^^

(이건 클래스를 따로 만들어서 쓴것이라 전체 소스는 올리기가 그렇네요..ㅠㅠ)

 

public class MyView extends View implements View.OnClickListener {

 

public static Bitmap mBitmap;

private Canvas mCanvas;

private Path mPath;

private Paint mBitmapPaint;

private Paint mPaint;

Context Context;

 

StringBuilder builder = new StringBuilder();

// 여러개의좌표를 얻기위한 배열

float[] x = new float[10];

float[] y = new float[10];

boolean[] touched = new boolean[10];

 

public MyView(Context context) {

super(context);

Context = context;

mPaint = new Paint();

mPaint.setAntiAlias(true);

mPaint.setDither(true);

mPaint.setColor(0xFF000000);

mPaint.setStyle(Paint.Style.STROKE);

mPaint.setStrokeJoin(Paint.Join.ROUND);

mPaint.setStrokeCap(Paint.Cap.ROUND);

mPaint.setStrokeWidth(5);

 

mPath = new Path();

mBitmapPaint = new Paint(Paint.DITHER_FLAG);

 

}

 

@Override

protected void onSizeChanged(int w, int h, int oldw, int oldh) {

super.onSizeChanged(w, h, oldw, oldh);

mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);

mCanvas = new Canvas(mBitmap);

}

 

@Override

protected void onDraw(Canvas canvas) {

canvas.drawColor(0xFFFFFFFF);

canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);

canvas.drawPath(mPath, mPaint);

}

 

@Override

public boolean onTouchEvent(MotionEvent event) {

int action = event.getAction() & MotionEvent.ACTION_MASK;

int pointerIndex = (event.getAction() & MotionEvent.ACTION_POINTER_ID_MASK);

pointerIndex = pointerIndex >> MotionEvent.ACTION_POINTER_ID_SHIFT;

int pointerId = event.getPointerId(pointerIndex);

int pointerCount = event.getPointerCount();

 

float mX = 0, mY = 0;

float TOUCH_TOLERANCE = 4;

 

mX = x[pointerId];

mY = y[pointerId];

 

switch (action) {

 

case MotionEvent.ACTION_DOWN:

 

pointerId = event.getPointerId(pointerIndex);

x[pointerId] = (int) event.getX(pointerIndex);

y[pointerId] = (int) event.getY(pointerIndex);

mPath.reset();

mPath.moveTo(x[pointerId], y[pointerId]);

mCanvas.drawPath(mPath, mPaint);

invalidate();

break;

 

case MotionEvent.ACTION_POINTER_DOWN:

pointerId = event.getPointerId(pointerIndex);

x[pointerId] = (int) event.getX(pointerIndex);

y[pointerId] = (int) event.getY(pointerIndex);

mPath.reset();

mPath.rMoveTo(x[pointerId], y[pointerId]);

mCanvas.drawPath(mPath, mPaint);

invalidate();

break;

 

case MotionEvent.ACTION_UP:

x[pointerId] = (int) event.getX(pointerIndex);

y[pointerId] = (int) event.getY(pointerIndex);

mPath.lineTo(x[pointerId], y[pointerId]);

// commit the path to our off screen

mCanvas.drawPath(mPath, mPaint);

// kill this so we don't double draw

mPath.reset();

break;

 

case MotionEvent.ACTION_POINTER_UP:

x[pointerId] = (int) event.getX(pointerIndex);

y[pointerId] = (int) event.getY(pointerIndex);

mPath.lineTo(x[pointerId], y[pointerId]);

mCanvas.drawPath(mPath, mPaint);

mPath.reset();

break;

 

case MotionEvent.ACTION_CANCEL:

touched[pointerId] = false;

x[pointerId] = (int) event.getX(pointerIndex);

y[pointerId] = (int) event.getY(pointerIndex);

break;

 

case MotionEvent.ACTION_MOVE:

for (int i = 0; i < pointerCount; i++) {

pointerIndex = i;

pointerId = event.getPointerId(pointerIndex);

x[pointerId] = (int) event.getX(pointerIndex);

y[pointerId] = (int) event.getY(pointerIndex);

float dx = Math.abs(x[pointerId] - mX);

float dy = Math.abs(y[pointerId] - mY);

if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {

mX = x[pointerId];

mY = y[pointerId];

}

}

mPath.quadTo(mX, mY, (x[pointerId] + mX) / 2,

(y[pointerId] + mY) / 2);

invalidate();

break;

}

updateTextView();

return true;

}

}