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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.keyguard;
     18 
     19 import android.graphics.Bitmap;
     20 import android.graphics.Canvas;
     21 import android.graphics.Color;
     22 import android.graphics.ColorFilter;
     23 import android.graphics.Paint;
     24 import android.graphics.Path;
     25 import android.graphics.PixelFormat;
     26 import android.graphics.PorterDuff;
     27 import android.graphics.PorterDuffXfermode;
     28 import android.graphics.Rect;
     29 import android.graphics.RectF;
     30 import android.graphics.drawable.Drawable;
     31 
     32 import android.util.Log;
     33 
     34 class KeyguardCircleFramedDrawable extends Drawable {
     35 
     36     private final Bitmap mBitmap;
     37     private final int mSize;
     38     private final Paint mPaint;
     39     private final float mShadowRadius;
     40     private final float mStrokeWidth;
     41     private final int mFrameColor;
     42     private final int mHighlightColor;
     43     private final int mFrameShadowColor;
     44 
     45     private float mScale;
     46     private Path mFramePath;
     47     private Rect mSrcRect;
     48     private RectF mDstRect;
     49     private RectF mFrameRect;
     50     private boolean mPressed;
     51 
     52     public KeyguardCircleFramedDrawable(Bitmap bitmap, int size,
     53             int frameColor, float strokeWidth,
     54             int frameShadowColor, float shadowRadius,
     55             int highlightColor) {
     56         super();
     57         mSize = size;
     58         mShadowRadius = shadowRadius;
     59         mFrameColor = frameColor;
     60         mFrameShadowColor = frameShadowColor;
     61         mStrokeWidth = strokeWidth;
     62         mHighlightColor = highlightColor;
     63 
     64         mBitmap = Bitmap.createBitmap(mSize, mSize, Bitmap.Config.ARGB_8888);
     65         final Canvas canvas = new Canvas(mBitmap);
     66 
     67         final int width = bitmap.getWidth();
     68         final int height = bitmap.getHeight();
     69         final int square = Math.min(width, height);
     70 
     71         final Rect cropRect = new Rect((width - square) / 2, (height - square) / 2, square, square);
     72         final RectF circleRect = new RectF(0f, 0f, mSize, mSize);
     73         circleRect.inset(mStrokeWidth / 2f, mStrokeWidth / 2f);
     74         circleRect.inset(mShadowRadius, mShadowRadius);
     75 
     76         final Path fillPath = new Path();
     77         fillPath.addArc(circleRect, 0f, 360f);
     78 
     79         canvas.drawColor(0, PorterDuff.Mode.CLEAR);
     80 
     81         // opaque circle matte
     82         mPaint = new Paint();
     83         mPaint.setAntiAlias(true);
     84         mPaint.setColor(Color.BLACK);
     85         mPaint.setStyle(Paint.Style.FILL);
     86         canvas.drawPath(fillPath, mPaint);
     87 
     88         // mask in the icon where the bitmap is opaque
     89         mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_ATOP));
     90         canvas.drawBitmap(bitmap, cropRect, circleRect, mPaint);
     91 
     92         // prepare paint for frame drawing
     93         mPaint.setXfermode(null);
     94 
     95         mScale = 1f;
     96 
     97         mSrcRect = new Rect(0, 0, mSize, mSize);
     98         mDstRect = new RectF(0, 0, mSize, mSize);
     99         mFrameRect = new RectF(mDstRect);
    100         mFramePath = new Path();
    101     }
    102 
    103     public void reset() {
    104         mScale = 1f;
    105         mPressed = false;
    106     }
    107 
    108     @Override
    109     public void draw(Canvas canvas) {
    110         // clear background
    111         final float outside = Math.min(canvas.getWidth(), canvas.getHeight());
    112         final float inside = mScale * outside;
    113         final float pad = (outside - inside) / 2f;
    114 
    115         mDstRect.set(pad, pad, outside - pad, outside - pad);
    116         canvas.drawBitmap(mBitmap, mSrcRect, mDstRect, null);
    117 
    118         mFrameRect.set(mDstRect);
    119         mFrameRect.inset(mStrokeWidth / 2f, mStrokeWidth / 2f);
    120         mFrameRect.inset(mShadowRadius, mShadowRadius);
    121 
    122         mFramePath.reset();
    123         mFramePath.addArc(mFrameRect, 0f, 360f);
    124 
    125         // white frame
    126         if (mPressed) {
    127             mPaint.setStyle(Paint.Style.FILL);
    128             mPaint.setColor(Color.argb((int) (0.33f * 255),
    129                             Color.red(mHighlightColor),
    130                             Color.green(mHighlightColor),
    131                             Color.blue(mHighlightColor)));
    132             canvas.drawPath(mFramePath, mPaint);
    133         }
    134         mPaint.setStrokeWidth(mStrokeWidth);
    135         mPaint.setStyle(Paint.Style.STROKE);
    136         mPaint.setColor(mPressed ? mHighlightColor : mFrameColor);
    137         mPaint.setShadowLayer(mShadowRadius, 0f, 0f, mFrameShadowColor);
    138         canvas.drawPath(mFramePath, mPaint);
    139     }
    140 
    141     public void setScale(float scale) {
    142         mScale = scale;
    143     }
    144 
    145     public float getScale() {
    146         return mScale;
    147     }
    148 
    149     public void setPressed(boolean pressed) {
    150         mPressed = pressed;
    151     }
    152 
    153     @Override
    154     public int getOpacity() {
    155         return PixelFormat.TRANSLUCENT;
    156     }
    157 
    158     @Override
    159     public void setAlpha(int alpha) {
    160     }
    161 
    162     @Override
    163     public void setColorFilter(ColorFilter cf) {
    164     }
    165 
    166     public boolean verifyParams(float iconSize, int frameColor, float stroke,
    167             int frameShadowColor, float shadowRadius, int highlightColor) {
    168         return mSize == iconSize
    169                 && mFrameColor == frameColor
    170                 && mStrokeWidth == stroke
    171                 && mFrameShadowColor == frameShadowColor
    172                 && mShadowRadius == shadowRadius
    173                 && mHighlightColor == highlightColor;
    174     }
    175 }
    176