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/*
* Copyright (C) 2013 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;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
import com.android.camera.FocusOverlayManager;
import com.android.camera.debug.Log;
import com.android.camera2.R;
/**
* Displays a focus indicator.
*/
public class FocusOverlay extends View implements FocusOverlayManager.FocusUI {
private static final Log.Tag TAG = new Log.Tag("FocusOverlay");
private final static int FOCUS_DURATION_MS = 500;
private final static int FOCUS_INDICATOR_ROTATION_DEGREES = 50;
private final Drawable mFocusIndicator;
private final Drawable mFocusOuterRing;
private final Rect mBounds = new Rect();
private final ValueAnimator mFocusAnimation = new ValueAnimator();
private int mPositionX;
private int mPositionY;
private int mAngle;
private final int mFocusIndicatorSize;
private boolean mShowIndicator;
private final int mFocusOuterRingSize;
private boolean mCurrentRunIsAutoFocus = true;
public FocusOverlay(Context context, AttributeSet attrs) {
super(context, attrs);
mFocusIndicator = getResources().getDrawable(R.drawable.focus_ring_touch_inner);
mFocusIndicatorSize = getResources().getDimensionPixelSize(R.dimen.focus_inner_ring_size);
mFocusOuterRing = getResources().getDrawable(R.drawable.focus_ring_touch_outer);
mFocusOuterRingSize = getResources().getDimensionPixelSize(R.dimen.focus_outer_ring_size);
}
@Override
public boolean hasFaces() {
// TODO: Add face detection support.
return false;
}
@Override
public void clearFocus() {
mShowIndicator = false;
}
@Override
public void setFocusPosition(int x, int y, boolean isAutoFocus) {
mPositionX = x;
mPositionY = y;
mBounds.set(x - mFocusIndicatorSize / 2, y - mFocusIndicatorSize / 2,
x + mFocusIndicatorSize / 2, y + mFocusIndicatorSize / 2);
mFocusIndicator.setBounds(mBounds);
mFocusOuterRing.setBounds(x - mFocusOuterRingSize / 2, y - mFocusOuterRingSize / 2,
x + mFocusOuterRingSize / 2, y + mFocusOuterRingSize / 2);
mCurrentRunIsAutoFocus = isAutoFocus;
if (getVisibility() != VISIBLE) {
setVisibility(VISIBLE);
}
}
@Override
public void onFocusStarted() {
mShowIndicator = true;
mFocusAnimation.setIntValues(0, FOCUS_INDICATOR_ROTATION_DEGREES);
mFocusAnimation.setDuration(FOCUS_DURATION_MS);
mFocusAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mAngle = (Integer) animation.getAnimatedValue();
invalidate();
}
});
mFocusAnimation.start();
}
@Override
public void onFocusSucceeded() {
mFocusAnimation.cancel();
mShowIndicator = false;
invalidate();
}
@Override
public void onFocusFailed() {
mFocusAnimation.cancel();
mShowIndicator = false;
invalidate();
}
@Override
public void pauseFaceDetection() {
// TODO: Add face detection support.
}
@Override
public void resumeFaceDetection() {
// TODO: Add face detection support.
}
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mShowIndicator && !mCurrentRunIsAutoFocus) {
mFocusOuterRing.draw(canvas);
canvas.save();
canvas.rotate(mAngle, mPositionX, mPositionY);
mFocusIndicator.draw(canvas);
canvas.restore();
}
}
}
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