package com.jiuqi.njt.register;
import java.util.List;
import com.jiuqi.njt.R;
import com.jiuqi.njt.util.ActivityUtil;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.CornerPathEffect;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Path;
import android.graphics.RectF;
import android.os.Build;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.view.WindowManager;
import android.widget.LinearLayout;
import android.widget.TextView;
/**
* http://blog.csdn.net/lmj623565791/article/details/42160391
* @author zhy
*
*/
@TargetApi(Build.VERSION_CODES.FROYO)
public class ViewPagerIndicator extends LinearLayout
{
/**
* 绘制三角形的画笔
*/
private Paint mPaint;
/**
* path构成一个三角形
*/
private Path mPath;
/**
* 三角形的宽度
*/
private int mTriangleWidth;
/**
* 三角形的高度
*/
private int mTriangleHeight;
/**
* 三角形的宽度为单个Tab的1/6
*/
private static final float RADIO_TRIANGEL = 1.0f / 6;
/**
* 三角形的最大宽度
*/
private final int DIMENSION_TRIANGEL_WIDTH = (int) (getScreenWidth() / 3 * RADIO_TRIANGEL);
/**
* 初始时，三角形指示器的偏移量
*/
private int mInitTranslationX;
/**
* 手指滑动时的偏移量
*/
private float mTranslationX;
/**
* 默认的Tab数量
*/
private static final int COUNT_DEFAULT_TAB = 4;
/**
* tab数量
*/
private int mTabVisibleCount = COUNT_DEFAULT_TAB;
/**
* tab上的内容
*/
private List<String> mTabTitles;
/**
* 与之绑定的ViewPager
*/
public ViewPager mViewPager;
private Context context;
/**
* 标题正常时的颜色
*/
// private static final int COLOR_TEXT_NORMAL = 0x77FFFFFF;
private static final int COLOR_TEXT_NORMAL = Color.parseColor("#6a6a6a");
/**
* 标题选中时的颜色
*/
private static final int COLOR_TEXT_HIGHLIGHTCOLOR = 0xFFFFFFFF;
int dateheight = 0;
int width = 0;
public ViewPagerIndicator(Context context)
{
this(context, null);
Log.wtf("dateheight", dateheight+"");
dateheight=ActivityUtil.getWindowDateHeight(context);
width = ActivityUtil.getWindowWidth(context);
}
public ViewPagerIndicator(Context context, AttributeSet attrs)
{
super(context, attrs);
this.context = context;
// 获得自定义属性，tab的数量
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.ViewPagerIndicator);
mTabVisibleCount = a.getInt(R.styleable.ViewPagerIndicator_item_count,
COUNT_DEFAULT_TAB);
if (mTabVisibleCount < 0)
mTabVisibleCount = COUNT_DEFAULT_TAB;
a.recycle();
// 初始化画笔
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setColor(Color.parseColor("#8Ffc8c02"));
mPaint.setStyle(Style.FILL);
// mPaint.setStyle(Paint.Style.STROKE);//设置空心
mPaint.setPathEffect(new CornerPathEffect(3));
}
/**
* 绘制指示器
*/
@SuppressLint("NewApi")
@Override
protected void dispatchDraw(Canvas canvas)
{
super.dispatchDraw(canvas);
canvas.save();
// 画笔平移到正确的位置
canvas.translate(mInitTranslationX + mTranslationX, getHeight() /2);
Log.e("------------------", "mInitTranslationX"+mInitTranslationX+"==="+getHeight());
dateheight=ActivityUtil.getWindowDateHeight(context);
Log.e("??", ""+dateheight/3);
// canvas.drawPath(mPath, mPaint);
RectF rect = new RectF(-mInitTranslationX*3/4,-dateheight/3 , mInitTranslationX*1.4f*3/4,dateheight/3);
canvas.drawRoundRect(rect,
dateheight/3, //x轴的半径
dateheight/3, //y轴的半径
mPaint);
Matrix matrix = new Matrix();
float aa = (float)(getHeight());
matrix.setTranslate(0, getHeight()/2);
// matrix.setScale(0, -200);
canvas.setMatrix(matrix);
// canvas.translate(0, getHeight()/2);
// canvas.drawCircle(10,-45, 50, mPaint);
// Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
// canvas.drawBitmap(bitmap , new Matrix(), mPaint);
canvas.restore();
}
/**
* 初始化三角形的宽度
*/
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh)
{
super.onSizeChanged(w, h, oldw, oldh);
mTriangleWidth = (int) (w / mTabVisibleCount * RADIO_TRIANGEL);// 1/6 of
// width
mTriangleWidth = Math.min(DIMENSION_TRIANGEL_WIDTH, mTriangleWidth);
// 初始化三角形
initTriangle();
// 初始时的偏移量
mInitTranslationX = getWidth() / mTabVisibleCount / 2 - mTriangleWidth
/ 2;
}
/**
* 设置可见的tab的数量
*
* @param count
*/
public void setVisibleTabCount(int count)
{
this.mTabVisibleCount = count;
}
/**
* 设置tab的标题内容 可选，可以自己在布局文件中写死
*
* @param datas
*/
public void setTabItemTitles(List<String> datas)
{
// 如果传入的list有值，则移除布局文件中设置的view
if (datas != null && datas.size() > 0)
{
this.removeAllViews();
this.mTabTitles = datas;
for (String title : mTabTitles)
{
// 添加view
addView(generateTextView(title));
}
// 设置item的click事件
setItemClickEvent();
}
}
/**
* 对外的ViewPager的回调接口
*
* @author zhy
*
*/
public interface PageChangeListener
{
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels);
public void onPageSelected(int position);
public void onPageScrollStateChanged(int state);
}
// 对外的ViewPager的回调接口
private PageChangeListener onPageChangeListener;
// 对外的ViewPager的回调接口的设置
public void setOnPageChangeListener(PageChangeListener pageChangeListener)
{
this.onPageChangeListener = pageChangeListener;
}
// 设置关联的ViewPager
public void setViewPager(ViewPager mViewPager, int pos)
{
this.mViewPager = mViewPager;
mViewPager.setOnPageChangeListener(new OnPageChangeListener()
{
@Override
public void onPageSelected(int position)
{
// 设置字体颜色高亮
resetTextViewColor();
highLightTextView(position);
// 回调
if (onPageChangeListener != null)
{
onPageChangeListener.onPageSelected(position);
}
}
@Override
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels)
{
// 滚动
scroll(position, positionOffset);
// 回调
if (onPageChangeListener != null)
{
onPageChangeListener.onPageScrolled(position,
positionOffset, positionOffsetPixels);
}
}
@Override
public void onPageScrollStateChanged(int state)
{
// 回调
if (onPageChangeListener != null)
{
onPageChangeListener.onPageScrollStateChanged(state);
}
}
});
// 设置当前页
mViewPager.setCurrentItem(pos);
// 高亮
highLightTextView(pos);
}
/**
* 高亮文本
*
* @param position
*/
protected void highLightTextView(int position)
{
View view = getChildAt(position);
if (view instanceof TextView)
{
// ((TextView) view).setTextColor(COLOR_TEXT_HIGHLIGHTCOLOR);
}
}
/**
* 重置文本颜色
*/
private void resetTextViewColor()
{
for (int i = 0; i < getChildCount(); i++)
{
View view = getChildAt(i);
if (view instanceof TextView)
{
((TextView) view).setTextColor(COLOR_TEXT_NORMAL);
}
}
}
/**
* 设置点击事件
*/
public void setItemClickEvent()
{
int cCount = getChildCount();
for (int i = 0; i < cCount; i++)
{
final int j = i;
View view = getChildAt(i);
view.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
mViewPager.setCurrentItem(j);
}
});
}
}
/**
* 根据标题生成我们的TextView
*
* @param text
* @return
*/
private TextView generateTextView(String text)
{
TextView tv = new TextView(getContext());
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
lp.width = getScreenWidth() / mTabVisibleCount;
tv.setGravity(Gravity.CENTER);
tv.setTextColor(COLOR_TEXT_NORMAL);
tv.setText(text);
tv.setTextSize(TypedValue.COMPLEX_UNIT_SP, 16);
tv.setLayoutParams(lp);
return tv;
}
/**
* 初始化三角形指示器
*/
private void initTriangle()
{
mPath = new Path();
mTriangleHeight = (int) (mTriangleWidth / 2 / Math.sqrt(2));
mPath.moveTo(0, 0);
mPath.lineTo(mTriangleWidth, 0);
mPath.lineTo(mTriangleWidth / 2, -mTriangleHeight);
mPath.close();
// mPath=new Path();
// mPath.moveTo(18, 20);
// mPath.lineTo(20, 20);
// mPath.lineTo(21, 21);
// mPath.lineTo(20, 22);
// mPath.lineTo(18, 22);
// mPath.lineTo(17, 21);
// mPath.close();//封闭
}
/**
* 指示器跟随手指滚动，以及容器滚动
*
* @param position
* @param offset
*/
public void scroll(int position, float offset)
{
/**
* <pre>
* 0-1:position=0 ;1-0:postion=0;
* </pre>
*/
// 不断改变偏移量，invalidate
mTranslationX = getWidth() / mTabVisibleCount * (position + offset);
int tabWidth = getScreenWidth() / mTabVisibleCount;
// 容器滚动，当移动到倒数最后一个的时候，开始滚动
if (offset > 0 && position >= (mTabVisibleCount - 2)
&& getChildCount() > mTabVisibleCount)
{
if (mTabVisibleCount != 1)
{
this.scrollTo((position - (mTabVisibleCount - 2)) * tabWidth
+ (int) (tabWidth * offset), 0);
} else
// 为count为1时 的特殊处理
{
this.scrollTo(
position * tabWidth + (int) (tabWidth * offset), 0);
}
}
invalidate();
}
/**
* 设置布局中view的一些必要属性；如果设置了setTabTitles，布局中view则无效
*/
@Override
protected void onFinishInflate()
{
Log.e("TAG", "onFinishInflate");
super.onFinishInflate();
int cCount = getChildCount();
if (cCount == 0)
return;
for (int i = 0; i < cCount; i++)
{
View view = getChildAt(i);
LinearLayout.LayoutParams lp = (LayoutParams) view
.getLayoutParams();
lp.weight = 0;
lp.width = getScreenWidth() / mTabVisibleCount;
view.setLayoutParams(lp);
}
// 设置点击事件
setItemClickEvent();
}
/**
* 获得屏幕的宽度
*
* @return
*/
public int getScreenWidth()
{
WindowManager wm = (WindowManager) getContext().getSystemService(
Context.WINDOW_SERVICE);
DisplayMetrics outMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(outMetrics);
return outMetrics.widthPixels;
}
}