mobile/android/base/home/FadedTextView.java@6474c204b198 (annotated)
mobile/android/base/home/FadedTextView.java
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*- |
| michael@0 | 2 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | package org.mozilla.gecko.home; |
| michael@0 | 7 | |
| michael@0 | 8 | import android.content.Context; |
| michael@0 | 9 | import android.content.res.TypedArray; |
| michael@0 | 10 | import android.graphics.Canvas; |
| michael@0 | 11 | import android.graphics.LinearGradient; |
| michael@0 | 12 | import android.graphics.Shader; |
| michael@0 | 13 | import android.graphics.drawable.Drawable; |
| michael@0 | 14 | import android.util.AttributeSet; |
| michael@0 | 15 | import android.widget.TextView; |
| michael@0 | 16 | |
| michael@0 | 17 | import org.mozilla.gecko.R; |
| michael@0 | 18 | |
| michael@0 | 19 | /** |
| michael@0 | 20 | * FadedTextView fades the ends of the text by fadeWidth amount, |
| michael@0 | 21 | * if the text is too long and requires an ellipsis. |
| michael@0 | 22 | */ |
| michael@0 | 23 | public class FadedTextView extends TextView { |
| michael@0 | 24 | |
| michael@0 | 25 | // Width of the fade effect from end of the view. |
| michael@0 | 26 | private int mFadeWidth; |
| michael@0 | 27 | |
| michael@0 | 28 | // Padding for compound drawables. |
| michael@0 | 29 | private int mCompoundPadding; |
| michael@0 | 30 | |
| michael@0 | 31 | public FadedTextView(Context context) { |
| michael@0 | 32 | this(context, null); |
| michael@0 | 33 | } |
| michael@0 | 34 | |
| michael@0 | 35 | public FadedTextView(Context context, AttributeSet attrs) { |
| michael@0 | 36 | this(context, attrs, android.R.attr.textViewStyle); |
| michael@0 | 37 | } |
| michael@0 | 38 | |
| michael@0 | 39 | public FadedTextView(Context context, AttributeSet attrs, int defStyle) { |
| michael@0 | 40 | super(context, attrs, defStyle); |
| michael@0 | 41 | |
| michael@0 | 42 | TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.FadedTextView); |
| michael@0 | 43 | mFadeWidth = a.getDimensionPixelSize(R.styleable.FadedTextView_fadeWidth, 0); |
| michael@0 | 44 | a.recycle(); |
| michael@0 | 45 | |
| michael@0 | 46 | mCompoundPadding = getCompoundDrawablePadding(); |
| michael@0 | 47 | } |
| michael@0 | 48 | |
| michael@0 | 49 | /** |
| michael@0 | 50 | * {@inheritDoc} |
| michael@0 | 51 | */ |
| michael@0 | 52 | @Override |
| michael@0 | 53 | public void onDraw(Canvas canvas) { |
| michael@0 | 54 | int width = getMeasuredWidth(); |
| michael@0 | 55 | |
| michael@0 | 56 | // Layout doesn't return a proper width for getWidth(). |
| michael@0 | 57 | // Instead check the width of the first line, as we've restricted to just one line. |
| michael@0 | 58 | if (getLayout().getLineWidth(0) > width) { |
| michael@0 | 59 | final Drawable leftDrawable = getCompoundDrawables()[0]; |
| michael@0 | 60 | int drawableWidth = 0; |
| michael@0 | 61 | if (leftDrawable != null) { |
| michael@0 | 62 | drawableWidth = leftDrawable.getIntrinsicWidth() + mCompoundPadding; |
| michael@0 | 63 | width -= drawableWidth; |
| michael@0 | 64 | } |
| michael@0 | 65 | |
| michael@0 | 66 | int color = getCurrentTextColor(); |
| michael@0 | 67 | float stop = ((float) (width - mFadeWidth) / (float) width); |
| michael@0 | 68 | LinearGradient gradient = new LinearGradient(0, 0, width, 0, |
| michael@0 | 69 | new int[] { color, color, 0x0 }, |
| michael@0 | 70 | new float[] { 0, stop, 1.0f - (drawableWidth / width) }, |
| michael@0 | 71 | Shader.TileMode.CLAMP); |
| michael@0 | 72 | getPaint().setShader(gradient); |
| michael@0 | 73 | } else { |
| michael@0 | 74 | getPaint().setShader(null); |
| michael@0 | 75 | } |
| michael@0 | 76 | |
| michael@0 | 77 | // Do a default draw. |
| michael@0 | 78 | super.onDraw(canvas); |
| michael@0 | 79 | } |
| michael@0 | 80 | } |
