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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.graphics.RectF;
import android.util.Log;
import com.android.camera.async.MainThread;
import com.android.camera.ui.motion.LinearScale;
/**
* The focus controller interacts with the focus ring UI element.
*/
public class FocusController {
private static final String TAG = "FocusController";
private final FocusRing mFocusRing;
private final FocusSound mFocusSound;
private final MainThread mMainThread;
public FocusController(FocusRing focusRing, FocusSound focusSound, MainThread mainThread) {
mFocusRing = focusRing;
mFocusSound = focusSound;
mMainThread = mainThread;
}
/**
* Show a passive focus animation at the center of the active area.
* This will likely be different than the view bounds due to varying image
* ratios and dimensions.
*/
public void showPassiveFocusAtCenter() {
mMainThread.execute(new Runnable() {
@Override
public void run() {
Log.v(TAG, "Running showPassiveFocusAtCenter()");
mFocusRing.startPassiveFocus();
mFocusRing.centerFocusLocation();
}
});
}
/**
* Show a passive focus animation at the given viewX and viewY position.
* This is usually indicates the camera subsystem kicked off an auto-focus
* at the given screen position.
*
* @param viewX the view's x coordinate
* @param viewY the view's y coordinate
*/
public void showPassiveFocusAt(final int viewX, final int viewY) {
mMainThread.execute(new Runnable() {
@Override
public void run() {
Log.v(TAG, "Running showPassiveFocusAt(" + viewX + ", " + viewY + ")");
mFocusRing.startPassiveFocus();
mFocusRing.setFocusLocation(viewX, viewY);
}
});
}
/**
* Show an active focus animation at the given viewX and viewY position.
* This is normally initiated by the user touching the screen at a given
* point.
*
* @param viewX the view's x coordinate
* @param viewY the view's y coordinate
*/
public void showActiveFocusAt(final int viewX, final int viewY) {
mMainThread.execute(new Runnable() {
@Override
public void run() {
Log.v(TAG, "showActiveFocusAt(" + viewX + ", " + viewY + ")");
mFocusRing.startActiveFocus();
mFocusRing.setFocusLocation(viewX, viewY);
// TODO: Enable focus sound when better audio controls exist.
// mFocusSound.play();
}
});
}
/**
* Computing the correct location for the focus ring requires knowing
* the screen position and size of the preview area so the drawing
* operations can be clipped correctly.
*/
public void configurePreviewDimensions(final RectF previewArea) {
mMainThread.execute(new Runnable() {
@Override
public void run() {
Log.v(TAG, "configurePreviewDimensions(" + previewArea + ")");
mFocusRing.configurePreviewDimensions(previewArea);
}
});
}
/**
* Set the radius of the focus ring as a radius between 0 and 1.
* This will map to the min and max values computed for the UI.
*/
public void setFocusRatio(final float ratio) {
mMainThread.execute(new Runnable() {
@Override
public void run() {
if (mFocusRing.isPassiveFocusRunning() ||
mFocusRing.isActiveFocusRunning()) {
mFocusRing.setRadiusRatio(ratio);
}
}
});
}
}
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