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WatchFace / Wearable / src / com.example.android.wearable.watchface /

CardBoundsWatchFaceService.java

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/*
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 * Copyright (C) 2014 The Android Open Source Project
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *      http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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package com.example.android.wearable.watchface;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.Paint;
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import android.graphics.Rect;
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import android.support.wearable.watchface.CanvasWatchFaceService;
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import android.support.wearable.watchface.WatchFaceStyle;
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import android.util.Log;
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import android.view.SurfaceHolder;
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/**
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 * Proof of concept sample watch face that demonstrates how a watch face can detect where the peek
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 * card is. This watch face draws a border around the area where the peeking card is.
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 */
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public class CardBoundsWatchFaceService extends CanvasWatchFaceService {
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    private static final String TAG = "CardBoundsWatchFace";
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    @Override
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    public Engine onCreateEngine() {
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        return new Engine();
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    }
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    private class Engine extends CanvasWatchFaceService.Engine {
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        static final int BORDER_WIDTH_PX = 5;
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        final Rect mCardBounds = new Rect();
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        final Paint mPaint = new Paint();
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        @Override
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        public void onCreate(SurfaceHolder holder) {
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            if (Log.isLoggable(TAG, Log.DEBUG)) {
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                Log.d(TAG, "onCreate");
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            }
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            super.onCreate(holder);
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            setWatchFaceStyle(new WatchFaceStyle.Builder(CardBoundsWatchFaceService.this)
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                    .setCardPeekMode(WatchFaceStyle.PEEK_MODE_VARIABLE)
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                    .setBackgroundVisibility(WatchFaceStyle.BACKGROUND_VISIBILITY_INTERRUPTIVE)
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                    .setShowSystemUiTime(true)
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                    .setPeekOpacityMode(WatchFaceStyle.PEEK_OPACITY_MODE_TRANSLUCENT)
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                    .build());
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        }
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        @Override
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        public void onAmbientModeChanged(boolean inAmbientMode) {
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            if (Log.isLoggable(TAG, Log.DEBUG)) {
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                Log.d(TAG, "onAmbientModeChanged: " + inAmbientMode);
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            }
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            super.onAmbientModeChanged(inAmbientMode);
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            invalidate();
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        }
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        @Override
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        public void onPeekCardPositionUpdate(Rect bounds) {
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            super.onPeekCardPositionUpdate(bounds);
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            if (Log.isLoggable(TAG, Log.DEBUG)) {
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                Log.d(TAG, "onPeekCardPositionUpdate: " + bounds);
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            }
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            super.onPeekCardPositionUpdate(bounds);
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            if (!bounds.equals(mCardBounds)) {
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                mCardBounds.set(bounds);
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                invalidate();
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            }
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        }
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        @Override
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        public void onDraw(Canvas canvas, Rect bounds) {
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            // Clear screen.
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            canvas.drawColor(isInAmbientMode() ? Color.BLACK : Color.BLUE);
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            // Draw border around card in interactive mode.
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            if (!isInAmbientMode()) {
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                mPaint.setColor(Color.MAGENTA);
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                canvas.drawRect(mCardBounds.left - BORDER_WIDTH_PX,
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                        mCardBounds.top - BORDER_WIDTH_PX,
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                        mCardBounds.right + BORDER_WIDTH_PX,
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                        mCardBounds.bottom + BORDER_WIDTH_PX, mPaint);
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            }
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            // Fill area under card.
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            mPaint.setColor(isInAmbientMode() ? Color.RED : Color.GREEN);
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            canvas.drawRect(mCardBounds, mPaint);
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        }
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    }
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}
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