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/*
* Copyright (C) 2016 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.dialer.callcomposer.camera.camerafocus;
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.FrameLayout;
import java.util.ArrayList;
import java.util.List;
/** Focusing overlay. */
public class RenderOverlay extends FrameLayout {
/** Render interface. */
interface Renderer {
boolean handlesTouch();
boolean onTouchEvent(MotionEvent evt);
void setOverlay(RenderOverlay overlay);
void layout(int left, int top, int right, int bottom);
void draw(Canvas canvas);
}
private RenderView mRenderView;
private List<Renderer> mClients;
// reverse list of touch clients
private List<Renderer> mTouchClients;
private int[] mPosition = new int[2];
public RenderOverlay(Context context, AttributeSet attrs) {
super(context, attrs);
mRenderView = new RenderView(context);
addView(mRenderView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
mClients = new ArrayList<>(10);
mTouchClients = new ArrayList<>(10);
setWillNotDraw(false);
addRenderer(new PieRenderer(context));
}
public PieRenderer getPieRenderer() {
for (Renderer renderer : mClients) {
if (renderer instanceof PieRenderer) {
return (PieRenderer) renderer;
}
}
return null;
}
public void addRenderer(Renderer renderer) {
mClients.add(renderer);
renderer.setOverlay(this);
if (renderer.handlesTouch()) {
mTouchClients.add(0, renderer);
}
renderer.layout(getLeft(), getTop(), getRight(), getBottom());
}
public void addRenderer(int pos, Renderer renderer) {
mClients.add(pos, renderer);
renderer.setOverlay(this);
renderer.layout(getLeft(), getTop(), getRight(), getBottom());
}
public void remove(Renderer renderer) {
mClients.remove(renderer);
renderer.setOverlay(null);
}
@Override
public boolean dispatchTouchEvent(MotionEvent m) {
return false;
}
private void adjustPosition() {
getLocationInWindow(mPosition);
}
public void update() {
mRenderView.invalidate();
}
@SuppressLint("ClickableViewAccessibility")
private class RenderView extends View {
public RenderView(Context context) {
super(context);
setWillNotDraw(false);
}
@Override
public boolean onTouchEvent(MotionEvent evt) {
if (mTouchClients != null) {
boolean res = false;
for (Renderer client : mTouchClients) {
res |= client.onTouchEvent(evt);
}
return res;
}
return false;
}
@Override
public void onLayout(boolean changed, int left, int top, int right, int bottom) {
adjustPosition();
super.onLayout(changed, left, top, right, bottom);
if (mClients == null) {
return;
}
for (Renderer renderer : mClients) {
renderer.layout(left, top, right, bottom);
}
}
@Override
public void draw(Canvas canvas) {
super.draw(canvas);
if (mClients == null) {
return;
}
boolean redraw = false;
for (Renderer renderer : mClients) {
renderer.draw(canvas);
redraw = redraw || ((OverlayRenderer) renderer).isVisible();
}
if (redraw) {
invalidate();
}
}
}
}
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