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/*
* Copyright (C) 2007 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.KeyEvent;
import android.view.View;
public class Sweep extends GraphicsActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new SampleView(this));
}
private static class SampleView extends View {
private Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
private float mRotate;
private Matrix mMatrix = new Matrix();
private Shader mShader;
private boolean mDoTiming;
public SampleView(Context context) {
super(context);
setFocusable(true);
setFocusableInTouchMode(true);
float x = 160;
float y = 100;
mShader = new SweepGradient(x, y, new int[] { Color.GREEN,
Color.RED,
Color.BLUE,
Color.GREEN }, null);
mPaint.setShader(mShader);
}
@Override protected void onDraw(Canvas canvas) {
Paint paint = mPaint;
float x = 160;
float y = 100;
canvas.drawColor(Color.WHITE);
mMatrix.setRotate(mRotate, x, y);
mShader.setLocalMatrix(mMatrix);
mPaint.setShader(mShader);
mRotate += 3;
if (mRotate >= 360) {
mRotate = 0;
}
invalidate();
if (mDoTiming) {
long now = System.currentTimeMillis();
for (int i = 0; i < 20; i++) {
canvas.drawCircle(x, y, 80, paint);
}
now = System.currentTimeMillis() - now;
android.util.Log.d("skia", "sweep ms = " + (now/20.));
}
else {
canvas.drawCircle(x, y, 80, paint);
}
}
@Override public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_D:
mPaint.setDither(!mPaint.isDither());
invalidate();
return true;
case KeyEvent.KEYCODE_T:
mDoTiming = !mDoTiming;
invalidate();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
}
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