1 /* 2 * Copyright (C) 2008 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.example.android.apis.graphics; 18 19 import android.content.Context; 20 import android.graphics.*; 21 import android.os.Bundle; 22 import android.view.View; 23 24 public class ScaleToFit extends GraphicsActivity { 25 26 @Override 27 protected void onCreate(Bundle savedInstanceState) { 28 super.onCreate(savedInstanceState); 29 setContentView(new SampleView(this)); 30 } 31 32 private static class SampleView extends View { 33 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 34 private final Paint mHairPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 35 private final Paint mLabelPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 36 private final Matrix mMatrix = new Matrix(); 37 private final RectF mSrcR = new RectF(); 38 39 private static final Matrix.ScaleToFit[] sFits = 40 new Matrix.ScaleToFit[] { 41 Matrix.ScaleToFit.FILL, 42 Matrix.ScaleToFit.START, 43 Matrix.ScaleToFit.CENTER, 44 Matrix.ScaleToFit.END 45 }; 46 47 private static final String[] sFitLabels = new String[] { 48 "FILL", "START", "CENTER", "END" 49 }; 50 51 private static final int[] sSrcData = new int[] { 52 80, 40, Color.RED, 53 40, 80, Color.GREEN, 54 30, 30, Color.BLUE, 55 80, 80, Color.BLACK 56 }; 57 private static final int N = 4; 58 59 private static final int WIDTH = 52; 60 private static final int HEIGHT = 52; 61 private final RectF mDstR = new RectF(0, 0, WIDTH, HEIGHT); 62 63 public SampleView(Context context) { 64 super(context); 65 66 mHairPaint.setStyle(Paint.Style.STROKE); 67 mLabelPaint.setTextSize(16); 68 } 69 70 private void setSrcR(int index) { 71 int w = sSrcData[index*3 + 0]; 72 int h = sSrcData[index*3 + 1]; 73 mSrcR.set(0, 0, w, h); 74 } 75 76 private void drawSrcR(Canvas canvas, int index) { 77 mPaint.setColor(sSrcData[index*3 + 2]); 78 canvas.drawOval(mSrcR, mPaint); 79 } 80 81 private void drawFit(Canvas canvas, int index, Matrix.ScaleToFit stf) { 82 canvas.save(); 83 84 setSrcR(index); 85 mMatrix.setRectToRect(mSrcR, mDstR, stf); 86 canvas.concat(mMatrix); 87 drawSrcR(canvas, index); 88 89 canvas.restore(); 90 91 canvas.drawRect(mDstR, mHairPaint); 92 } 93 94 @Override 95 protected void onDraw(Canvas canvas) { 96 canvas.drawColor(Color.WHITE); 97 98 canvas.translate(10, 10); 99 100 canvas.save(); 101 for (int i = 0; i < N; i++) { 102 setSrcR(i); 103 drawSrcR(canvas, i); 104 canvas.translate(mSrcR.width() + 15, 0); 105 } 106 canvas.restore(); 107 108 canvas.translate(0, 100); 109 for (int j = 0; j < sFits.length; j++) { 110 canvas.save(); 111 for (int i = 0; i < N; i++) { 112 drawFit(canvas, i, sFits[j]); 113 canvas.translate(mDstR.width() + 8, 0); 114 } 115 canvas.drawText(sFitLabels[j], 0, HEIGHT*2/3, mLabelPaint); 116 canvas.restore(); 117 canvas.translate(0, 80); 118 } 119 } 120 } 121 } 122
