package com.imooc_wuziqi;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewTreeObserver;
public class WuziqiPanel extends View {
private int mPanelWidth;
private float mLineHight;
private int MAX_LINE = 10;
private Paint mPaint = new Paint();
public WuziqiPanel(Context context, AttributeSet attrs) {
super(context, attrs);
setBackgroundColor(0x44ff0000);
init();
}
private void init() {
mPaint.setColor(0x88000000);
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setStyle(Paint.Style.STROKE);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int heighSize = MeasureSpec.getSize(heightMeasureSpec);
int heighMode = MeasureSpec.getMode(heightMeasureSpec);
int width = Math.min(widthSize, heighSize);
if (widthMode == MeasureSpec.UNSPECIFIED) {
width = heighSize;
} else if (heighMode == MeasureSpec.UNSPECIFIED) {
width = widthSize;
}
setMeasuredDimension(width, width);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
// TODO Auto-generated method stub
super.onSizeChanged(w, h, oldw, oldh);
mPanelWidth = w;
mLineHight =mPanelWidth* 1.0f / MAX_LINE;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
drawBoard(canvas);
}
private void drawBoard(Canvas canvas) {
int w = mPanelWidth;
float lineHeight =mLineHight ;
//绘制棋盘的横线和竖线
for (int i = 0; i < MAX_LINE; i++) {
int startX = (int) (lineHeight * 0.5);
int endX = w - startX;
int y = (int) (lineHeight * (0.5 + i));//倍数增长,如果是加,长度就会是完全错误的
//绘制横线
canvas.drawLine(startX, y, endX, y, mPaint);
//绘制竖线
canvas.drawLine(y, startX, y, endX, mPaint);
}
}
}