| package com.android.internal.widget; |
| |
| import android.content.Context; |
| import android.graphics.Canvas; |
| import android.graphics.Paint; |
| import android.graphics.Paint.FontMetricsInt; |
| import android.util.Log; |
| import android.view.MotionEvent; |
| import android.view.VelocityTracker; |
| import android.view.View; |
| import android.view.ViewConfiguration; |
| |
| import java.util.ArrayList; |
| |
| public class PointerLocationView extends View { |
| public static class PointerState { |
| private final ArrayList<Float> mXs = new ArrayList<Float>(); |
| private final ArrayList<Float> mYs = new ArrayList<Float>(); |
| private boolean mCurDown; |
| private int mCurX; |
| private int mCurY; |
| private float mCurPressure; |
| private float mCurSize; |
| private int mCurWidth; |
| private VelocityTracker mVelocity; |
| } |
| |
| private final ViewConfiguration mVC; |
| private final Paint mTextPaint; |
| private final Paint mTextBackgroundPaint; |
| private final Paint mTextLevelPaint; |
| private final Paint mPaint; |
| private final Paint mTargetPaint; |
| private final Paint mPathPaint; |
| private final FontMetricsInt mTextMetrics = new FontMetricsInt(); |
| private int mHeaderBottom; |
| private boolean mCurDown; |
| private int mCurNumPointers; |
| private int mMaxNumPointers; |
| private final ArrayList<PointerState> mPointers |
| = new ArrayList<PointerState>(); |
| |
| private boolean mPrintCoords = true; |
| |
| public PointerLocationView(Context c) { |
| super(c); |
| mVC = ViewConfiguration.get(c); |
| mTextPaint = new Paint(); |
| mTextPaint.setAntiAlias(true); |
| mTextPaint.setTextSize(10 |
| * getResources().getDisplayMetrics().density); |
| mTextPaint.setARGB(255, 0, 0, 0); |
| mTextBackgroundPaint = new Paint(); |
| mTextBackgroundPaint.setAntiAlias(false); |
| mTextBackgroundPaint.setARGB(128, 255, 255, 255); |
| mTextLevelPaint = new Paint(); |
| mTextLevelPaint.setAntiAlias(false); |
| mTextLevelPaint.setARGB(192, 255, 0, 0); |
| mPaint = new Paint(); |
| mPaint.setAntiAlias(true); |
| mPaint.setARGB(255, 255, 255, 255); |
| mPaint.setStyle(Paint.Style.STROKE); |
| mPaint.setStrokeWidth(2); |
| mTargetPaint = new Paint(); |
| mTargetPaint.setAntiAlias(false); |
| mTargetPaint.setARGB(255, 0, 0, 192); |
| mPathPaint = new Paint(); |
| mPathPaint.setAntiAlias(false); |
| mPathPaint.setARGB(255, 0, 96, 255); |
| mPaint.setStyle(Paint.Style.STROKE); |
| mPaint.setStrokeWidth(1); |
| |
| PointerState ps = new PointerState(); |
| ps.mVelocity = VelocityTracker.obtain(); |
| mPointers.add(ps); |
| } |
| |
| public void setPrintCoords(boolean state) { |
| mPrintCoords = state; |
| } |
| |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| mTextPaint.getFontMetricsInt(mTextMetrics); |
| mHeaderBottom = -mTextMetrics.ascent+mTextMetrics.descent+2; |
| if (false) { |
| Log.i("foo", "Metrics: ascent=" + mTextMetrics.ascent |
| + " descent=" + mTextMetrics.descent |
| + " leading=" + mTextMetrics.leading |
| + " top=" + mTextMetrics.top |
| + " bottom=" + mTextMetrics.bottom); |
| } |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| synchronized (mPointers) { |
| final int w = getWidth(); |
| final int itemW = w/7; |
| final int base = -mTextMetrics.ascent+1; |
| final int bottom = mHeaderBottom; |
| |
| final int NP = mPointers.size(); |
| |
| if (NP > 0) { |
| final PointerState ps = mPointers.get(0); |
| canvas.drawRect(0, 0, itemW-1, bottom,mTextBackgroundPaint); |
| canvas.drawText("P: " + mCurNumPointers + " / " + mMaxNumPointers, |
| 1, base, mTextPaint); |
| |
| final int N = ps.mXs.size(); |
| if ((mCurDown && ps.mCurDown) || N == 0) { |
| canvas.drawRect(itemW, 0, (itemW * 2) - 1, bottom, mTextBackgroundPaint); |
| canvas.drawText("X: " + ps.mCurX, 1 + itemW, base, mTextPaint); |
| canvas.drawRect(itemW * 2, 0, (itemW * 3) - 1, bottom, mTextBackgroundPaint); |
| canvas.drawText("Y: " + ps.mCurY, 1 + itemW * 2, base, mTextPaint); |
| } else { |
| float dx = ps.mXs.get(N-1) - ps.mXs.get(0); |
| float dy = ps.mYs.get(N-1) - ps.mYs.get(0); |
| canvas.drawRect(itemW, 0, (itemW * 2) - 1, bottom, |
| Math.abs(dx) < mVC.getScaledTouchSlop() |
| ? mTextBackgroundPaint : mTextLevelPaint); |
| canvas.drawText("dX: " + String.format("%.1f", dx), 1 + itemW, base, mTextPaint); |
| canvas.drawRect(itemW * 2, 0, (itemW * 3) - 1, bottom, |
| Math.abs(dy) < mVC.getScaledTouchSlop() |
| ? mTextBackgroundPaint : mTextLevelPaint); |
| canvas.drawText("dY: " + String.format("%.1f", dy), 1 + itemW * 2, base, mTextPaint); |
| } |
| |
| canvas.drawRect(itemW * 3, 0, (itemW * 4) - 1, bottom, mTextBackgroundPaint); |
| int velocity = ps.mVelocity == null ? 0 : (int) (ps.mVelocity.getXVelocity() * 1000); |
| canvas.drawText("Xv: " + velocity, 1 + itemW * 3, base, mTextPaint); |
| |
| canvas.drawRect(itemW * 4, 0, (itemW * 5) - 1, bottom, mTextBackgroundPaint); |
| velocity = ps.mVelocity == null ? 0 : (int) (ps.mVelocity.getYVelocity() * 1000); |
| canvas.drawText("Yv: " + velocity, 1 + itemW * 4, base, mTextPaint); |
| |
| canvas.drawRect(itemW * 5, 0, (itemW * 6) - 1, bottom, mTextBackgroundPaint); |
| canvas.drawRect(itemW * 5, 0, (itemW * 5) + (ps.mCurPressure * itemW) - 1, |
| bottom, mTextLevelPaint); |
| canvas.drawText("Prs: " + String.format("%.2f", ps.mCurPressure), 1 + itemW * 5, |
| base, mTextPaint); |
| |
| canvas.drawRect(itemW * 6, 0, w, bottom, mTextBackgroundPaint); |
| canvas.drawRect(itemW * 6, 0, (itemW * 6) + (ps.mCurSize * itemW) - 1, |
| bottom, mTextLevelPaint); |
| canvas.drawText("Size: " + String.format("%.2f", ps.mCurSize), 1 + itemW * 6, |
| base, mTextPaint); |
| } |
| |
| for (int p=0; p<NP; p++) { |
| final PointerState ps = mPointers.get(p); |
| |
| if (mCurDown && ps.mCurDown) { |
| canvas.drawLine(0, (int)ps.mCurY, getWidth(), (int)ps.mCurY, mTargetPaint); |
| canvas.drawLine((int)ps.mCurX, 0, (int)ps.mCurX, getHeight(), mTargetPaint); |
| int pressureLevel = (int)(ps.mCurPressure*255); |
| mPaint.setARGB(255, pressureLevel, 128, 255-pressureLevel); |
| canvas.drawPoint(ps.mCurX, ps.mCurY, mPaint); |
| canvas.drawCircle(ps.mCurX, ps.mCurY, ps.mCurWidth, mPaint); |
| } |
| } |
| |
| for (int p=0; p<NP; p++) { |
| final PointerState ps = mPointers.get(p); |
| |
| final int N = ps.mXs.size(); |
| float lastX=0, lastY=0; |
| boolean haveLast = false; |
| boolean drawn = false; |
| mPaint.setARGB(255, 128, 255, 255); |
| for (int i=0; i<N; i++) { |
| float x = ps.mXs.get(i); |
| float y = ps.mYs.get(i); |
| if (Float.isNaN(x)) { |
| haveLast = false; |
| continue; |
| } |
| if (haveLast) { |
| canvas.drawLine(lastX, lastY, x, y, mPathPaint); |
| canvas.drawPoint(lastX, lastY, mPaint); |
| drawn = true; |
| } |
| lastX = x; |
| lastY = y; |
| haveLast = true; |
| } |
| |
| if (drawn) { |
| if (ps.mVelocity != null) { |
| mPaint.setARGB(255, 255, 64, 128); |
| float xVel = ps.mVelocity.getXVelocity() * (1000/60); |
| float yVel = ps.mVelocity.getYVelocity() * (1000/60); |
| canvas.drawLine(lastX, lastY, lastX+xVel, lastY+yVel, mPaint); |
| } else { |
| canvas.drawPoint(lastX, lastY, mPaint); |
| } |
| } |
| } |
| } |
| } |
| |
| public void addTouchEvent(MotionEvent event) { |
| synchronized (mPointers) { |
| int action = event.getAction(); |
| |
| //Log.i("Pointer", "Motion: action=0x" + Integer.toHexString(action) |
| // + " pointers=" + event.getPointerCount()); |
| |
| int NP = mPointers.size(); |
| |
| //mRect.set(0, 0, getWidth(), mHeaderBottom+1); |
| //invalidate(mRect); |
| //if (mCurDown) { |
| // mRect.set(mCurX-mCurWidth-3, mCurY-mCurWidth-3, |
| // mCurX+mCurWidth+3, mCurY+mCurWidth+3); |
| //} else { |
| // mRect.setEmpty(); |
| //} |
| if (action == MotionEvent.ACTION_DOWN) { |
| for (int p=0; p<NP; p++) { |
| final PointerState ps = mPointers.get(p); |
| ps.mXs.clear(); |
| ps.mYs.clear(); |
| ps.mVelocity = VelocityTracker.obtain(); |
| ps.mCurDown = false; |
| } |
| mPointers.get(0).mCurDown = true; |
| mMaxNumPointers = 0; |
| if (mPrintCoords) { |
| Log.i("Pointer", "Pointer 1: DOWN"); |
| } |
| } |
| |
| if ((action&MotionEvent.ACTION_MASK) == MotionEvent.ACTION_POINTER_DOWN) { |
| final int index = (action&MotionEvent.ACTION_POINTER_INDEX_MASK) |
| >> MotionEvent.ACTION_POINTER_INDEX_SHIFT; |
| final int id = event.getPointerId(index); |
| while (NP <= id) { |
| PointerState ps = new PointerState(); |
| ps.mVelocity = VelocityTracker.obtain(); |
| mPointers.add(ps); |
| NP++; |
| } |
| final PointerState ps = mPointers.get(id); |
| ps.mVelocity = VelocityTracker.obtain(); |
| ps.mCurDown = true; |
| if (mPrintCoords) { |
| Log.i("Pointer", "Pointer " + (id+1) + ": DOWN"); |
| } |
| } |
| |
| final int NI = event.getPointerCount(); |
| |
| mCurDown = action != MotionEvent.ACTION_UP |
| && action != MotionEvent.ACTION_CANCEL; |
| mCurNumPointers = mCurDown ? NI : 0; |
| if (mMaxNumPointers < mCurNumPointers) { |
| mMaxNumPointers = mCurNumPointers; |
| } |
| |
| for (int i=0; i<NI; i++) { |
| final int id = event.getPointerId(i); |
| final PointerState ps = mPointers.get(id); |
| ps.mVelocity.addMovement(event); |
| ps.mVelocity.computeCurrentVelocity(1); |
| final int N = event.getHistorySize(); |
| for (int j=0; j<N; j++) { |
| if (mPrintCoords) { |
| Log.i("Pointer", "Pointer " + (id+1) + ": (" |
| + event.getHistoricalX(i, j) |
| + ", " + event.getHistoricalY(i, j) + ")" |
| + " Prs=" + event.getHistoricalPressure(i, j) |
| + " Size=" + event.getHistoricalSize(i, j)); |
| } |
| ps.mXs.add(event.getHistoricalX(i, j)); |
| ps.mYs.add(event.getHistoricalY(i, j)); |
| } |
| if (mPrintCoords) { |
| Log.i("Pointer", "Pointer " + (id+1) + ": (" |
| + event.getX(i) + ", " + event.getY(i) + ")" |
| + " Prs=" + event.getPressure(i) |
| + " Size=" + event.getSize(i)); |
| } |
| ps.mXs.add(event.getX(i)); |
| ps.mYs.add(event.getY(i)); |
| ps.mCurX = (int)event.getX(i); |
| ps.mCurY = (int)event.getY(i); |
| //Log.i("Pointer", "Pointer #" + p + ": (" + ps.mCurX |
| // + "," + ps.mCurY + ")"); |
| ps.mCurPressure = event.getPressure(i); |
| ps.mCurSize = event.getSize(i); |
| ps.mCurWidth = (int)(ps.mCurSize*(getWidth()/3)); |
| } |
| |
| if ((action&MotionEvent.ACTION_MASK) == MotionEvent.ACTION_POINTER_UP) { |
| final int index = (action&MotionEvent.ACTION_POINTER_INDEX_MASK) |
| >> MotionEvent.ACTION_POINTER_INDEX_SHIFT; |
| final int id = event.getPointerId(index); |
| final PointerState ps = mPointers.get(id); |
| ps.mXs.add(Float.NaN); |
| ps.mYs.add(Float.NaN); |
| ps.mCurDown = false; |
| if (mPrintCoords) { |
| Log.i("Pointer", "Pointer " + (id+1) + ": UP"); |
| } |
| } |
| |
| if (action == MotionEvent.ACTION_UP) { |
| for (int i=0; i<NI; i++) { |
| final int id = event.getPointerId(i); |
| final PointerState ps = mPointers.get(id); |
| if (ps.mCurDown) { |
| ps.mCurDown = false; |
| if (mPrintCoords) { |
| Log.i("Pointer", "Pointer " + (id+1) + ": UP"); |
| } |
| } |
| } |
| } |
| |
| //if (mCurDown) { |
| // mRect.union(mCurX-mCurWidth-3, mCurY-mCurWidth-3, |
| // mCurX+mCurWidth+3, mCurY+mCurWidth+3); |
| //} |
| //invalidate(mRect); |
| postInvalidate(); |
| } |
| } |
| |
| @Override |
| public boolean onTouchEvent(MotionEvent event) { |
| addTouchEvent(event); |
| return true; |
| } |
| } |