| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.android.apis.graphics; |
| |
| import android.content.Context; |
| import android.graphics.*; |
| import android.os.Bundle; |
| import android.view.View; |
| |
| public class ScaleToFit extends GraphicsActivity { |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setContentView(new SampleView(this)); |
| } |
| |
| private static class SampleView extends View { |
| private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); |
| private final Paint mHairPaint = new Paint(Paint.ANTI_ALIAS_FLAG); |
| private final Paint mLabelPaint = new Paint(Paint.ANTI_ALIAS_FLAG); |
| private final Matrix mMatrix = new Matrix(); |
| private final RectF mSrcR = new RectF(); |
| |
| private static final Matrix.ScaleToFit[] sFits = |
| new Matrix.ScaleToFit[] { |
| Matrix.ScaleToFit.FILL, |
| Matrix.ScaleToFit.START, |
| Matrix.ScaleToFit.CENTER, |
| Matrix.ScaleToFit.END |
| }; |
| |
| private static final String[] sFitLabels = new String[] { |
| "FILL", "START", "CENTER", "END" |
| }; |
| |
| private static final int[] sSrcData = new int[] { |
| 80, 40, Color.RED, |
| 40, 80, Color.GREEN, |
| 30, 30, Color.BLUE, |
| 80, 80, Color.BLACK |
| }; |
| private static final int N = 4; |
| |
| private static final int WIDTH = 52; |
| private static final int HEIGHT = 52; |
| private final RectF mDstR = new RectF(0, 0, WIDTH, HEIGHT); |
| |
| public SampleView(Context context) { |
| super(context); |
| |
| mHairPaint.setStyle(Paint.Style.STROKE); |
| mLabelPaint.setTextSize(16); |
| } |
| |
| private void setSrcR(int index) { |
| int w = sSrcData[index*3 + 0]; |
| int h = sSrcData[index*3 + 1]; |
| mSrcR.set(0, 0, w, h); |
| } |
| |
| private void drawSrcR(Canvas canvas, int index) { |
| mPaint.setColor(sSrcData[index*3 + 2]); |
| canvas.drawOval(mSrcR, mPaint); |
| } |
| |
| private void drawFit(Canvas canvas, int index, Matrix.ScaleToFit stf) { |
| canvas.save(); |
| |
| setSrcR(index); |
| mMatrix.setRectToRect(mSrcR, mDstR, stf); |
| canvas.concat(mMatrix); |
| drawSrcR(canvas, index); |
| |
| canvas.restore(); |
| |
| canvas.drawRect(mDstR, mHairPaint); |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| canvas.drawColor(Color.WHITE); |
| |
| canvas.translate(10, 10); |
| |
| canvas.save(); |
| for (int i = 0; i < N; i++) { |
| setSrcR(i); |
| drawSrcR(canvas, i); |
| canvas.translate(mSrcR.width() + 15, 0); |
| } |
| canvas.restore(); |
| |
| canvas.translate(0, 100); |
| for (int j = 0; j < sFits.length; j++) { |
| canvas.save(); |
| for (int i = 0; i < N; i++) { |
| drawFit(canvas, i, sFits[j]); |
| canvas.translate(mDstR.width() + 8, 0); |
| } |
| canvas.drawText(sFitLabels[j], 0, HEIGHT*2/3, mLabelPaint); |
| canvas.restore(); |
| canvas.translate(0, 80); |
| } |
| } |
| } |
| } |