package com.loaderman.customviewdemo;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.graphics.Rect;

import android.util.AttributeSet;

import android.util.Log;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

public class RectRefreshSurfaceView extends SurfaceView {

    private Paint mPaint;

    public RectRefreshSurfaceView(Context context) {

        super(context);

        init();

    }

    public RectRefreshSurfaceView(Context context, AttributeSet attrs) {

        super(context, attrs);

        init();

    }

    public RectRefreshSurfaceView(Context context, AttributeSet attrs, int defStyle) {

        super(context, attrs, defStyle);

        init();

    }

    private void init() {

        mPaint = new Paint();

        mPaint.setColor(Color.argb(0x1F, 0xFF, 0xFF, 0xFF));

        mPaint.setTextSize(30);

        getHolder().addCallback(new SurfaceHolder.Callback() {

            @Override

            public void surfaceCreated(SurfaceHolder holder) {

                drawText(holder);

            }

            @Override

            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

            }

            @Override

            public void surfaceDestroyed(SurfaceHolder holder) {

            }

        });

    }

    private void drawText(final SurfaceHolder holder) {

        new Thread(new Runnable() {

            @Override

            public void run() {

                //先进行清屏操作

                while (true) {

                    Rect dirtyRect = new Rect(0, 0, 1, 1);

                    Canvas canvas = holder.lockCanvas(dirtyRect);

                    Rect canvasRect = canvas.getClipBounds();

                    if (getWidth() == canvasRect.width() && getHeight() == canvasRect.height()) {

                        canvas.drawColor(Color.BLACK);

                        holder.unlockCanvasAndPost(canvas);

                    } else {

                        holder.unlockCanvasAndPost(canvas);

                        break;

                    }

                }

                //画图

                for (int i = 0; i < 10; i++) {

                    //画大方

                    if (i == 0) {

                        Canvas canvas = holder.lockCanvas(new Rect(10, 10, 600, 600));

                        dumpCanvasRect(canvas);

                        canvas.drawColor(Color.RED);

                        holder.unlockCanvasAndPost(canvas);

                    }

                    //画中方

                    if (i == 1) {

                        Canvas canvas = holder.lockCanvas(new Rect(30, 30, 570, 570));

                        dumpCanvasRect(canvas);

                        canvas.drawColor(Color.GREEN);

                        holder.unlockCanvasAndPost(canvas);

                    }

                    //画小方

                    if (i == 2) {

                        Canvas canvas = holder.lockCanvas(new Rect(60, 60, 540, 540));

                        dumpCanvasRect(canvas);

                        canvas.drawColor(Color.BLUE);

                        holder.unlockCanvasAndPost(canvas);

                    }

                    //画圆形

                    if (i == 3) {

                        Canvas canvas = holder.lockCanvas(new Rect(200, 200, 400, 400));

                        dumpCanvasRect(canvas);

                        mPaint.setColor(Color.argb(0x3F, 0xFF, 0xFF, 0xFF));

                        canvas.drawCircle(300, 300, 100, mPaint);

                        holder.unlockCanvasAndPost(canvas);

                    }

                    //写字

                    if (i == 4) {

                        Canvas canvas = holder.lockCanvas(new Rect(250, 250, 350, 350));

                        dumpCanvasRect(canvas);

                        mPaint.setColor(Color.RED);

                        canvas.drawText(i + "", 300, 300, mPaint);

                        holder.unlockCanvasAndPost(canvas);

                    }

                    try {

                        Thread.sleep(800);

                    } catch (Exception e) {

                        e.printStackTrace();

                    }

                }

            }

        }).start();

    }

    private void dumpCanvasRect(Canvas canvas) {

        if (canvas != null) {

            Rect rect = canvas.getClipBounds();

            Log.d("loaderman", "left:" + rect.left + "  top:" + rect.top + "  right:" + rect.right + "  bottom:" + rect.bottom);

        }

    }

}