Merge "Draw a trace of the movement of fingers" into main (fb2ada0d) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/input/debug/TouchpadVisualizationView.java

+95 −12

Original line number	Diff line number	Diff line
		@@ -27,20 +27,28 @@ import com.android.server.input.TouchpadFingerState;
		import com.android.server.input.TouchpadHardwareProperties;
		import com.android.server.input.TouchpadHardwareState;

		import java.util.ArrayDeque;
		import java.util.HashMap;
		import java.util.Map;

		public class TouchpadVisualizationView extends View {
		private static final String TAG = "TouchpadVizMain";
		private static final boolean DEBUG = true;
		private static final float DEFAULT_RES_X = 47f;
		private static final float DEFAULT_RES_Y = 45f;
		private static final float MAX_TRACE_HISTORY_DURATION_SECONDS = 1f;

		private final TouchpadHardwareProperties mTouchpadHardwareProperties;
		private float mScaleFactor;

		TouchpadHardwareState mLatestHardwareState = new TouchpadHardwareState(0, 0, 0, 0,
		new TouchpadFingerState[]{});
		private final ArrayDeque<TouchpadHardwareState> mHardwareStateHistory =
		new ArrayDeque<TouchpadHardwareState>();
		private final Map<Integer, TouchpadFingerState> mTempFingerStatesByTrackingId = new HashMap<>();

		private final Paint mOvalStrokePaint;
		private final Paint mOvalFillPaint;
		private final Paint mTracePaint;
		private final Paint mCenterPointPaint;
		private final RectF mTempOvalRect = new RectF();

		public TouchpadVisualizationView(Context context,
		@@ -55,6 +63,29 @@ public class TouchpadVisualizationView extends View {
		mOvalFillPaint = new Paint();
		mOvalFillPaint.setAntiAlias(true);
		mOvalFillPaint.setARGB(255, 0, 0, 0);
		mTracePaint = new Paint();
		mTracePaint.setAntiAlias(false);
		mTracePaint.setARGB(255, 0, 0, 255);
		mTracePaint.setStyle(Paint.Style.STROKE);
		mTracePaint.setStrokeWidth(2);
		mCenterPointPaint = new Paint();
		mCenterPointPaint.setAntiAlias(true);
		mCenterPointPaint.setARGB(255, 255, 0, 0);
		mCenterPointPaint.setStrokeWidth(2);
		}

		private void removeOldPoints() {
		float latestTimestamp = mHardwareStateHistory.getLast().getTimestamp();

		while (!mHardwareStateHistory.isEmpty()) {
		TouchpadHardwareState oldestPoint = mHardwareStateHistory.getFirst();
		float onScreenTime = latestTimestamp - oldestPoint.getTimestamp();
		if (onScreenTime >= MAX_TRACE_HISTORY_DURATION_SECONDS) {
		mHardwareStateHistory.removeFirst();
		} else {
		break;
		}
		}
		}

		private void drawOval(Canvas canvas, float x, float y, float major, float minor, float angle) {
		@@ -71,19 +102,22 @@ public class TouchpadVisualizationView extends View {

		@Override
		protected void onDraw(Canvas canvas) {
		if (mHardwareStateHistory.isEmpty()) {
		return;
		}

		TouchpadHardwareState latestHardwareState = mHardwareStateHistory.getLast();

		float maximumPressure = 0;
		for (TouchpadFingerState touchpadFingerState : mLatestHardwareState.getFingerStates()) {
		for (TouchpadFingerState touchpadFingerState : latestHardwareState.getFingerStates()) {
		maximumPressure = Math.max(maximumPressure, touchpadFingerState.getPressure());
		}

		for (TouchpadFingerState touchpadFingerState : mLatestHardwareState.getFingerStates()) {
		float newX = translateRange(mTouchpadHardwareProperties.getLeft(),
		mTouchpadHardwareProperties.getRight(), 0, getWidth(),
		touchpadFingerState.getPositionX());
		// Visualizing fingers as ovals
		for (TouchpadFingerState touchpadFingerState : latestHardwareState.getFingerStates()) {
		float newX = translateX(touchpadFingerState.getPositionX());

		float newY = translateRange(mTouchpadHardwareProperties.getTop(),
		mTouchpadHardwareProperties.getBottom(), 0, getHeight(),
		touchpadFingerState.getPositionY());
		float newY = translateY(touchpadFingerState.getPositionY());

		float newAngle = translateRange(0, mTouchpadHardwareProperties.getOrientationMaximum(),
		0, 90, touchpadFingerState.getOrientation());
		@@ -102,6 +136,28 @@ public class TouchpadVisualizationView extends View {

		drawOval(canvas, newX, newY, newTouchMajor, newTouchMinor, newAngle);
		}

		mTempFingerStatesByTrackingId.clear();

		// Drawing the trace
		for (TouchpadHardwareState currentHardwareState : mHardwareStateHistory) {
		for (TouchpadFingerState currentFingerState : currentHardwareState.getFingerStates()) {
		TouchpadFingerState prevFingerState = mTempFingerStatesByTrackingId.put(
		currentFingerState.getTrackingId(), currentFingerState);

		if (prevFingerState == null) {
		continue;
		}

		float currentX = translateX(currentFingerState.getPositionX());
		float currentY = translateY(currentFingerState.getPositionY());
		float prevX = translateX(prevFingerState.getPositionX());
		float prevY = translateY(prevFingerState.getPositionY());

		canvas.drawLine(prevX, prevY, currentX, currentY, mTracePaint);
		canvas.drawPoint(currentX, currentY, mCenterPointPaint);
		}
		}
		}

		/**
		@@ -114,7 +170,18 @@ public class TouchpadVisualizationView extends View {
		logHardwareState(schs);
		}

		mLatestHardwareState = schs;
		if (!mHardwareStateHistory.isEmpty()
		&& mHardwareStateHistory.getLast().getFingerCount() == 0
		&& schs.getFingerCount() > 0) {
		mHardwareStateHistory.clear();
		}

		mHardwareStateHistory.addLast(schs);
		removeOldPoints();

		if (DEBUG) {
		logFingerTrace();
		}

		invalidate();
		}
		@@ -128,6 +195,16 @@ public class TouchpadVisualizationView extends View {
		mScaleFactor = scaleFactor;
		}

		private float translateX(float x) {
		return translateRange(mTouchpadHardwareProperties.getLeft(),
		mTouchpadHardwareProperties.getRight(), 0, getWidth(), x);
		}

		private float translateY(float y) {
		return translateRange(mTouchpadHardwareProperties.getTop(),
		mTouchpadHardwareProperties.getBottom(), 0, getHeight(), y);
		}

		private float translateRange(float rangeBeforeMin, float rangeBeforeMax,
		float rangeAfterMin, float rangeAfterMax, float value) {
		return rangeAfterMin + (value - rangeBeforeMin) / (rangeBeforeMax - rangeBeforeMin) * (
		@@ -154,4 +231,10 @@ public class TouchpadVisualizationView extends View {
		}
		}

		private void logFingerTrace() {
		Slog.d(TAG, "Trace size= " + mHardwareStateHistory.size());
		for (TouchpadFingerState tfs : mHardwareStateHistory.getLast().getFingerStates()) {
		Slog.d(TAG, "ID= " + tfs.getTrackingId());
		}
		}
		}
		No newline at end of file