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/*
* 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);
}
}
}
}
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