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.camera.drawable; 18 19 import android.content.res.Resources; 20 import android.graphics.Canvas; 21 import android.graphics.Color; 22 import android.graphics.ColorFilter; 23 import android.graphics.Paint; 24 import android.graphics.Paint.Align; 25 import android.graphics.Rect; 26 import android.graphics.drawable.Drawable; 27 import android.util.TypedValue; 28 29 30 public class TextDrawable extends Drawable { 31 32 private static final int DEFAULT_COLOR = Color.WHITE; 33 private static final int DEFAULT_TEXTSIZE = 15; 34 35 private Paint mPaint; 36 private CharSequence mText; 37 private int mIntrinsicWidth; 38 private int mIntrinsicHeight; 39 TextDrawable(Resources res, CharSequence text)40 public TextDrawable(Resources res, CharSequence text) { 41 mText = text; 42 mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 43 mPaint.setColor(DEFAULT_COLOR); 44 mPaint.setTextAlign(Align.CENTER); 45 float textSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 46 DEFAULT_TEXTSIZE, res.getDisplayMetrics()); 47 mPaint.setTextSize(textSize); 48 mIntrinsicWidth = (int) (mPaint.measureText(mText, 0, mText.length()) + .5); 49 mIntrinsicHeight = mPaint.getFontMetricsInt(null); 50 } 51 52 @Override draw(Canvas canvas)53 public void draw(Canvas canvas) { 54 Rect bounds = getBounds(); 55 canvas.drawText(mText, 0, mText.length(), 56 bounds.centerX(), bounds.centerY(), mPaint); 57 } 58 59 @Override getOpacity()60 public int getOpacity() { 61 return mPaint.getAlpha(); 62 } 63 64 @Override getIntrinsicWidth()65 public int getIntrinsicWidth() { 66 return mIntrinsicWidth; 67 } 68 69 @Override getIntrinsicHeight()70 public int getIntrinsicHeight() { 71 return mIntrinsicHeight; 72 } 73 74 @Override setAlpha(int alpha)75 public void setAlpha(int alpha) { 76 mPaint.setAlpha(alpha); 77 } 78 79 @Override setColorFilter(ColorFilter filter)80 public void setColorFilter(ColorFilter filter) { 81 mPaint.setColorFilter(filter); 82 } 83 84 } 85