| /* |
| * Copyright (C) 2010 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.android.test.hwui; |
| |
| import android.app.Activity; |
| import android.content.Context; |
| import android.graphics.Canvas; |
| import android.graphics.LinearGradient; |
| import android.graphics.Matrix; |
| import android.graphics.Paint; |
| import android.graphics.Shader; |
| import android.os.Bundle; |
| import android.view.View; |
| |
| @SuppressWarnings({"UnusedDeclaration"}) |
| public class GradientsActivity extends Activity { |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| setContentView(new ShadersView(this)); |
| } |
| |
| static class ShadersView extends View { |
| private final Paint mPaint; |
| private final float mDrawWidth; |
| private final float mDrawHeight; |
| private final LinearGradient mGradient; |
| private final Matrix mMatrix; |
| |
| ShadersView(Context c) { |
| super(c); |
| |
| mDrawWidth = 200; |
| mDrawHeight = 200; |
| |
| mGradient = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); |
| mMatrix = new Matrix(); |
| |
| mPaint = new Paint(); |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| super.onDraw(canvas); |
| canvas.drawRGB(255, 255, 255); |
| |
| // Gradients |
| canvas.save(); |
| float top = 40.0f; |
| float right = 40.0f + mDrawWidth; |
| float left = 40.0f; |
| float bottom = 40.0f + mDrawHeight; |
| |
| mPaint.setShader(mGradient); |
| |
| mMatrix.setScale(1, mDrawWidth); |
| mMatrix.postRotate(90); |
| mMatrix.postTranslate(right, top); |
| mGradient.setLocalMatrix(mMatrix); |
| canvas.drawRect(right - mDrawWidth, top, right, top + mDrawHeight, mPaint); |
| |
| top += 40.0f + mDrawHeight; |
| bottom += 40.0f + mDrawHeight; |
| |
| mMatrix.setScale(1, mDrawHeight); |
| mMatrix.postTranslate(left, top); |
| mGradient.setLocalMatrix(mMatrix); |
| canvas.drawRect(left, top, right, top + mDrawHeight, mPaint); |
| |
| left += 40.0f + mDrawWidth; |
| right += 40.0f + mDrawWidth; |
| top -= 40.0f + mDrawHeight; |
| bottom -= 40.0f + mDrawHeight; |
| |
| mMatrix.setScale(1, mDrawHeight); |
| mMatrix.postRotate(180); |
| mMatrix.postTranslate(left, bottom); |
| mGradient.setLocalMatrix(mMatrix); |
| canvas.drawRect(left, bottom - mDrawHeight, right, bottom, mPaint); |
| |
| top += 40.0f + mDrawHeight; |
| bottom += 40.0f + mDrawHeight; |
| |
| mMatrix.setScale(1, mDrawWidth); |
| mMatrix.postRotate(-90); |
| mMatrix.postTranslate(left, top); |
| mGradient.setLocalMatrix(mMatrix); |
| canvas.drawRect(left, top, left + mDrawWidth, bottom, mPaint); |
| |
| canvas.restore(); |
| } |
| } |
| } |