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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 package org.chromium.chrome.browser.widget; |
| 6 |
| 7 import android.content.Context; |
| 8 import android.graphics.Canvas; |
| 9 import android.util.AttributeSet; |
| 10 import android.view.View; |
| 11 |
| 12 /** |
| 13 * A class that encapsulates {@link FadingShadow} as a self-contained view. |
| 14 */ |
| 15 public class FadingShadowView extends View { |
| 16 private FadingShadow mFadingShadow; |
| 17 private int mPosition; |
| 18 private float mStrength; |
| 19 |
| 20 /** |
| 21 * Constructor for inflating from XML. |
| 22 */ |
| 23 public FadingShadowView(Context context, AttributeSet attrs) { |
| 24 super(context, attrs); |
| 25 } |
| 26 |
| 27 /** |
| 28 * Sets shadow color and position, please refer to the below function. Note
that this function |
| 29 * must be called before using this class. |
| 30 * @see FadingShadow#drawShadow(View, Canvas, int, float, float) |
| 31 */ |
| 32 public void init(int shadowColor, int position) { |
| 33 mFadingShadow = new FadingShadow(shadowColor); |
| 34 mPosition = position; |
| 35 postInvalidateOnAnimation(); |
| 36 } |
| 37 |
| 38 /** |
| 39 * Sets the shadow strength. Please refer to the below function's shadowStre
ngth argument. |
| 40 * @see FadingShadow#drawShadow(View, Canvas, int, float, float) |
| 41 */ |
| 42 public void setStrength(float strength) { |
| 43 if (mStrength != strength) { |
| 44 mStrength = strength; |
| 45 postInvalidateOnAnimation(); |
| 46 } |
| 47 } |
| 48 |
| 49 /** |
| 50 * Gets the shadow strength. Please refer to the below function's shadowStre
ngth argument. |
| 51 * @see FadingShadow#drawShadow(View, Canvas, int, float, float) |
| 52 */ |
| 53 public float getStrength() { |
| 54 return mStrength; |
| 55 } |
| 56 |
| 57 @Override |
| 58 protected void onDraw(Canvas canvas) { |
| 59 super.onDraw(canvas); |
| 60 if (mFadingShadow != null) { |
| 61 mFadingShadow.drawShadow(this, canvas, mPosition, getHeight(), mStre
ngth); |
| 62 } |
| 63 } |
| 64 } |
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