Add Pointer Location to the window manager.

The window manager now has pointer location built into it.
Viva la touch!

1 files changed, 333 insertions, 0 deletions

diff --git a/common/java/com/android/common/ui/PointerLocationView.java b/common/java/com/android/common/ui/PointerLocationView.java
new file mode 100644
index 0000000..e83c5ae
--- /dev/null
+++ b/common/java/com/android/common/ui/PointerLocationView.java
@@ -0,0 +1,333 @@
+package com.android.common.ui;
+
+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 id = (action&MotionEvent.ACTION_POINTER_ID_MASK)
+                        >> MotionEvent.ACTION_POINTER_ID_SHIFT;
+                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 PointerState ps = mPointers.get(event.getPointerId(i));
+                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 " + (i+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 " + (i+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 id = (action&MotionEvent.ACTION_POINTER_ID_MASK)
+                        >> MotionEvent.ACTION_POINTER_ID_SHIFT;
+                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 PointerState ps = mPointers.get(event.getPointerId(i));
+                    if (ps.mCurDown) {
+                        ps.mCurDown = false;
+                        if (mPrintCoords) {
+                            Log.i("Pointer", "Pointer " + (i+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;
+    }
+}