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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.camera.ui.focus;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.RectF;
import android.graphics.Region;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import com.android.camera.ui.motion.AnimationClock.SystemTimeClock;
import com.android.camera.ui.motion.DynamicAnimator;
import com.android.camera.ui.motion.Invalidator;
import com.android.camera.ui.motion.LinearScale;
import org.codeaurora.snapcam.R;
/**
* Custom view for running the focus ring animations.
*/
public class FocusRingView extends View implements Invalidator, FocusRing {
private static final String TAG = "FocusRingView";
private static final float FADE_IN_DURATION_MILLIS = 1000f;
private static final float FADE_OUT_DURATION_MILLIS = 250f;
private final AutoFocusRing mAutoFocusRing;
private final ManualFocusRing mManualFocusRing;
private final DynamicAnimator mAnimator;
private final LinearScale mRatioScale;
private final float mDefaultRadiusPx;
private FocusRingRenderer currentFocusAnimation;
private boolean isFirstDraw;
private float mLastRadiusPx;
private RectF mPreviewSize;
public FocusRingView(Context context, AttributeSet attrs) {
super(context, attrs);
Resources res = getResources();
Paint paint = makePaint(res, R.color.focus_color);
float focusCircleMinSize = res.getDimensionPixelSize(R.dimen.focus_circle_min_size);
float focusCircleMaxSize = res.getDimensionPixelSize(R.dimen.focus_circle_max_size);
mDefaultRadiusPx = res.getDimensionPixelSize(R.dimen.focus_circle_initial_size);
mRatioScale = new LinearScale(0, 1, focusCircleMinSize, focusCircleMaxSize);
mAnimator = new DynamicAnimator(this, new SystemTimeClock());
mAutoFocusRing = new AutoFocusRing(mAnimator, paint,
FADE_IN_DURATION_MILLIS,
FADE_OUT_DURATION_MILLIS);
mManualFocusRing = new ManualFocusRing(mAnimator, paint,
FADE_OUT_DURATION_MILLIS);
mAnimator.animations.add(mAutoFocusRing);
mAnimator.animations.add(mManualFocusRing);
isFirstDraw = true;
mLastRadiusPx = mDefaultRadiusPx;
}
@Override
public boolean isPassiveFocusRunning() {
return mAutoFocusRing.isActive();
}
@Override
public boolean isActiveFocusRunning() {
return mManualFocusRing.isActive();
}
@Override
public void startPassiveFocus() {
mAnimator.invalidate();
long tMs = mAnimator.getTimeMillis();
if (mManualFocusRing.isActive() && !mManualFocusRing.isExiting()) {
mManualFocusRing.stop(tMs);
}
mAutoFocusRing.start(tMs, mLastRadiusPx, mLastRadiusPx);
currentFocusAnimation = mAutoFocusRing;
}
@Override
public void startActiveFocus() {
mAnimator.invalidate();
long tMs = mAnimator.getTimeMillis();
if (mAutoFocusRing.isActive() && !mAutoFocusRing.isExiting()) {
mAutoFocusRing.stop(tMs);
}
mManualFocusRing.start(tMs, 0.0f, mLastRadiusPx);
currentFocusAnimation = mManualFocusRing;
}
@Override
public void stopFocusAnimations() {
long tMs = mAnimator.getTimeMillis();
if (mManualFocusRing.isActive() && !mManualFocusRing.isExiting()
&& !mManualFocusRing.isEntering()) {
mManualFocusRing.exit(tMs);
}
if (mAutoFocusRing.isActive() && !mAutoFocusRing.isExiting()) {
mAutoFocusRing.exit(tMs);
}
}
@Override
public void setFocusLocation(float viewX, float viewY) {
mAutoFocusRing.setCenterX((int) viewX);
mAutoFocusRing.setCenterY((int) viewY);
mManualFocusRing.setCenterX((int) viewX);
mManualFocusRing.setCenterY((int) viewY);
}
@Override
public void centerFocusLocation() {
Point center = computeCenter();
mAutoFocusRing.setCenterX(center.x);
mAutoFocusRing.setCenterY(center.y);
mManualFocusRing.setCenterX(center.x);
mManualFocusRing.setCenterY(center.y);
}
@Override
public void setRadiusRatio(float ratio) {
setRadius(mRatioScale.scale(mRatioScale.clamp(ratio)));
}
@Override
public void configurePreviewDimensions(RectF previewArea) {
mPreviewSize = previewArea;
mLastRadiusPx = mDefaultRadiusPx;
if (!isFirstDraw) {
centerAutofocusRing();
}
}
@Override
protected void onDraw(Canvas canvas) {
if (isFirstDraw) {
isFirstDraw = false;
centerAutofocusRing();
}
if (mPreviewSize != null) {
canvas.clipRect(mPreviewSize, Region.Op.REPLACE);
}
mAnimator.draw(canvas);
}
private void setRadius(float radiusPx) {
long tMs = mAnimator.getTimeMillis();
// Some devices return zero for invalid or "unknown" diopter values.
if (currentFocusAnimation != null && radiusPx > 0.1f) {
currentFocusAnimation.setRadius(tMs, radiusPx);
mLastRadiusPx = radiusPx;
}
}
private void centerAutofocusRing() {
Point center = computeCenter();
mAutoFocusRing.setCenterX(center.x);
mAutoFocusRing.setCenterY(center.y);
}
private Point computeCenter() {
if (mPreviewSize != null && (mPreviewSize.width() * mPreviewSize.height() > 0.01f)) {
Log.i(TAG, "Computing center via preview size.");
return new Point((int) mPreviewSize.centerX(), (int) mPreviewSize.centerY());
}
Log.i(TAG, "Computing center via view bounds.");
return new Point(getWidth() / 2, getHeight() / 2);
}
private Paint makePaint(Resources res, int color) {
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setColor(res.getColor(color));
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeCap(Paint.Cap.ROUND);
paint.setStrokeWidth(res.getDimension(R.dimen.focus_circle_stroke));
return paint;
}
}
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