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      1 /*
      2  * Copyright (C) 2007 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 com.example.android.apis.R;
     20 
     21 import android.app.Activity;
     22 import android.content.Context;
     23 import android.graphics.*;
     24 import android.graphics.drawable.*;
     25 import android.os.Bundle;
     26 import android.view.KeyEvent;
     27 import android.view.*;
     28 
     29 public class RoundRects extends GraphicsActivity {
     30 
     31     @Override
     32     protected void onCreate(Bundle savedInstanceState) {
     33         super.onCreate(savedInstanceState);
     34         setContentView(new SampleView(this));
     35     }
     36 
     37     private static class SampleView extends View {
     38         private Path    mPath;
     39         private Paint   mPaint;
     40         private Rect    mRect;
     41         private GradientDrawable mDrawable;
     42 
     43         public SampleView(Context context) {
     44             super(context);
     45             setFocusable(true);
     46 
     47             mPath = new Path();
     48             mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
     49             mRect = new Rect(0, 0, 120, 120);
     50 
     51             mDrawable = new GradientDrawable(GradientDrawable.Orientation.TL_BR,
     52                                              new int[] { 0xFFFF0000, 0xFF00FF00,
     53                                                  0xFF0000FF });
     54             mDrawable.setShape(GradientDrawable.RECTANGLE);
     55             mDrawable.setGradientRadius((float)(Math.sqrt(2) * 60));
     56         }
     57 
     58         static void setCornerRadii(GradientDrawable drawable, float r0,
     59                                    float r1, float r2, float r3) {
     60             drawable.setCornerRadii(new float[] { r0, r0, r1, r1,
     61                                                   r2, r2, r3, r3 });
     62         }
     63 
     64         @Override protected void onDraw(Canvas canvas) {
     65 
     66             mDrawable.setBounds(mRect);
     67 
     68             float r = 16;
     69 
     70             canvas.save();
     71             canvas.translate(10, 10);
     72             mDrawable.setGradientType(GradientDrawable.LINEAR_GRADIENT);
     73             setCornerRadii(mDrawable, r, r, 0, 0);
     74             mDrawable.draw(canvas);
     75             canvas.restore();
     76 
     77             canvas.save();
     78             canvas.translate(10 + mRect.width() + 10, 10);
     79             mDrawable.setGradientType(GradientDrawable.RADIAL_GRADIENT);
     80             setCornerRadii(mDrawable, 0, 0, r, r);
     81             mDrawable.draw(canvas);
     82             canvas.restore();
     83 
     84             canvas.translate(0, mRect.height() + 10);
     85 
     86             canvas.save();
     87             canvas.translate(10, 10);
     88             mDrawable.setGradientType(GradientDrawable.SWEEP_GRADIENT);
     89             setCornerRadii(mDrawable, 0, r, r, 0);
     90             mDrawable.draw(canvas);
     91             canvas.restore();
     92 
     93             canvas.save();
     94             canvas.translate(10 + mRect.width() + 10, 10);
     95             mDrawable.setGradientType(GradientDrawable.LINEAR_GRADIENT);
     96             setCornerRadii(mDrawable, r, 0, 0, r);
     97             mDrawable.draw(canvas);
     98             canvas.restore();
     99 
    100             canvas.translate(0, mRect.height() + 10);
    101 
    102             canvas.save();
    103             canvas.translate(10, 10);
    104             mDrawable.setGradientType(GradientDrawable.RADIAL_GRADIENT);
    105             setCornerRadii(mDrawable, r, 0, r, 0);
    106             mDrawable.draw(canvas);
    107             canvas.restore();
    108 
    109             canvas.save();
    110             canvas.translate(10 + mRect.width() + 10, 10);
    111             mDrawable.setGradientType(GradientDrawable.SWEEP_GRADIENT);
    112             setCornerRadii(mDrawable, 0, r, 0, r);
    113             mDrawable.draw(canvas);
    114             canvas.restore();
    115 
    116         }
    117     }
    118 }
    119 
    120