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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 class KeyguardCircleFramedDrawable extends Drawable {
     33 
     34     private final Bitmap mBitmap;
     35     private final int mSize;
     36     private final Paint mPaint;
     37     private final float mShadowRadius;
     38     private final float mStrokeWidth;
     39     private final int mFrameColor;
     40     private final int mHighlightColor;
     41     private final int mFrameShadowColor;
     42 
     43     private float mScale;
     44     private Path mFramePath;
     45     private Rect mSrcRect;
     46     private RectF mDstRect;
     47     private RectF mFrameRect;
     48     private boolean mPressed;
     49 
     50     public KeyguardCircleFramedDrawable(Bitmap bitmap, int size,
     51             int frameColor, float strokeWidth,
     52             int frameShadowColor, float shadowRadius,
     53             int highlightColor) {
     54         super();
     55         mSize = size;
     56         mShadowRadius = shadowRadius;
     57         mFrameColor = frameColor;
     58         mFrameShadowColor = frameShadowColor;
     59         mStrokeWidth = strokeWidth;
     60         mHighlightColor = highlightColor;
     61 
     62         mBitmap = Bitmap.createBitmap(mSize, mSize, Bitmap.Config.ARGB_8888);
     63         final Canvas canvas = new Canvas(mBitmap);
     64 
     65         final int width = bitmap.getWidth();
     66         final int height = bitmap.getHeight();
     67         final int square = Math.min(width, height);
     68 
     69         final Rect cropRect = new Rect((width - square) / 2, (height - square) / 2, square, square);
     70         final RectF circleRect = new RectF(0f, 0f, mSize, mSize);
     71         circleRect.inset(mStrokeWidth / 2f, mStrokeWidth / 2f);
     72         circleRect.inset(mShadowRadius, mShadowRadius);
     73 
     74         final Path fillPath = new Path();
     75         fillPath.addArc(circleRect, 0f, 360f);
     76 
     77         canvas.drawColor(0, PorterDuff.Mode.CLEAR);
     78 
     79         // opaque circle matte
     80         mPaint = new Paint();
     81         mPaint.setAntiAlias(true);
     82         mPaint.setColor(Color.BLACK);
     83         mPaint.setStyle(Paint.Style.FILL);
     84         canvas.drawPath(fillPath, mPaint);
     85 
     86         // mask in the icon where the bitmap is opaque
     87         mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_ATOP));
     88         canvas.drawBitmap(bitmap, cropRect, circleRect, mPaint);
     89 
     90         // prepare paint for frame drawing
     91         mPaint.setXfermode(null);
     92 
     93         mScale = 1f;
     94 
     95         mSrcRect = new Rect(0, 0, mSize, mSize);
     96         mDstRect = new RectF(0, 0, mSize, mSize);
     97         mFrameRect = new RectF(mDstRect);
     98         mFramePath = new Path();
     99     }
    100 
    101     public void reset() {
    102         mScale = 1f;
    103         mPressed = false;
    104     }
    105 
    106     @Override
    107     public void draw(Canvas canvas) {
    108         // clear background
    109         final float outside = Math.min(canvas.getWidth(), canvas.getHeight());
    110         final float inside = mScale * outside;
    111         final float pad = (outside - inside) / 2f;
    112 
    113         mDstRect.set(pad, pad, outside - pad, outside - pad);
    114         canvas.drawBitmap(mBitmap, mSrcRect, mDstRect, null);
    115 
    116         mFrameRect.set(mDstRect);
    117         mFrameRect.inset(mStrokeWidth / 2f, mStrokeWidth / 2f);
    118         mFrameRect.inset(mShadowRadius, mShadowRadius);
    119 
    120         mFramePath.reset();
    121         mFramePath.addArc(mFrameRect, 0f, 360f);
    122 
    123         // white frame
    124         if (mPressed) {
    125             mPaint.setStyle(Paint.Style.FILL);
    126             mPaint.setColor(Color.argb((int) (0.33f * 255),
    127                             Color.red(mHighlightColor),
    128                             Color.green(mHighlightColor),
    129                             Color.blue(mHighlightColor)));
    130             canvas.drawPath(mFramePath, mPaint);
    131         }
    132         mPaint.setStrokeWidth(mStrokeWidth);
    133         mPaint.setStyle(Paint.Style.STROKE);
    134         mPaint.setColor(mPressed ? mHighlightColor : mFrameColor);
    135         mPaint.setShadowLayer(mShadowRadius, 0f, 0f, mFrameShadowColor);
    136         canvas.drawPath(mFramePath, mPaint);
    137     }
    138 
    139     public void setScale(float scale) {
    140         mScale = scale;
    141     }
    142 
    143     public float getScale() {
    144         return mScale;
    145     }
    146 
    147     public void setPressed(boolean pressed) {
    148         mPressed = pressed;
    149     }
    150 
    151     @Override
    152     public int getOpacity() {
    153         return PixelFormat.TRANSLUCENT;
    154     }
    155 
    156     @Override
    157     public void setAlpha(int alpha) {
    158     }
    159 
    160     @Override
    161     public void setColorFilter(ColorFilter cf) {
    162     }
    163 
    164     public boolean verifyParams(float iconSize, int frameColor, float stroke,
    165             int frameShadowColor, float shadowRadius, int highlightColor) {
    166         return mSize == iconSize
    167                 && mFrameColor == frameColor
    168                 && mStrokeWidth == stroke
    169                 && mFrameShadowColor == frameShadowColor
    170                 && mShadowRadius == shadowRadius
    171                 && mHighlightColor == highlightColor;
    172     }
    173 }
    174