package com.inpor.fmctv.util;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import com.inpor.fmctv.R;
public class AntoLineUtil extends ViewGroup {
/**
* 子view左右间距
*/
private int mHorizontalSpacing;
/**
* 子view上下行距离
*/
private int mVerticalSpacing;
private Context context;
public AntoLineUtil(Context context) {
this(context, null);
this.context = context;
}
public AntoLineUtil(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public AntoLineUtil(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
if (attrs != null) {
TypedArray array = context.obtainStyledAttributes(attrs,
R.styleable.AntoLineUtil);
mHorizontalSpacing = array.getDimensionPixelOffset(
R.styleable.AntoLineUtil_horizontalSpacing, 0);
mVerticalSpacing = array.getDimensionPixelOffset(
R.styleable.AntoLineUtil_verticalSpacing, 0);
array.recycle();
if (mHorizontalSpacing < 0) mHorizontalSpacing = 0;
if (mVerticalSpacing < 0) mVerticalSpacing = 0;
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int width = MeasureSpec.getSize(widthMeasureSpec);
int count = getChildCount();
for (int i = 0; i < count; i++) {
measureChild(getChildAt(i), widthMeasureSpec, heightMeasureSpec);
}
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
if (widthMode != MeasureSpec.EXACTLY) {
widthMeasureSpec = MeasureSpec.makeMeasureSpec(
getAutoLinefeedWidth(width), widthMode);
}
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
if (heightMode != MeasureSpec.EXACTLY) {
heightMeasureSpec = MeasureSpec.makeMeasureSpec(
getAutoLinefeedHeight(width), heightMode);
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
/**
* 自动换行 计算需要的宽度
*
* @param width 可用宽度
* @return 需要的宽度
*/
private int getAutoLinefeedWidth(int width) {
int totalWidth = getPaddingLeft() + getPaddingRight();
for (int i = 0; i < getChildCount(); i++) {
if (i > 0) totalWidth += mHorizontalSpacing;
View child = getChildAt(i);
int childWidth = child.getMeasuredWidth();
totalWidth += childWidth;
if (totalWidth >= width) {
totalWidth = width;
break;
}
}
return totalWidth;
}
/**
* 自动换行 计算需要的高度
*
* @param width 可用宽度
* @return 需要的高度
*/
private int getAutoLinefeedHeight(int width) {
int lineWidth = width - getPaddingLeft() - getPaddingRight();
int availableLineWidth = lineWidth;
int totalHeight = getPaddingTop() + getPaddingBottom();
int lineChildIndex = 0;
int lineMaxHeight = 0;
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
int childWidth = child.getMeasuredWidth();
int childHeight = child.getMeasuredHeight();
int needWidth = i == 0 ? childWidth : (childWidth + mHorizontalSpacing);
if (availableLineWidth < needWidth) {
totalHeight = totalHeight + lineMaxHeight;
if (i > 0) totalHeight += mVerticalSpacing;
availableLineWidth = lineWidth;
lineMaxHeight = 0;
lineChildIndex = 0;
}
int realNeedWidth = lineChildIndex == 0 ? childWidth : (childWidth + mHorizontalSpacing);
lineMaxHeight = Math.max(childHeight, lineMaxHeight);
availableLineWidth = availableLineWidth - realNeedWidth;
lineChildIndex++;
}
totalHeight = totalHeight + lineMaxHeight;
return totalHeight;
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
layout();
}
private void layout() {
int count = getChildCount();
int childLeft = getPaddingLeft();
int childTop = getPaddingTop();
int lineWidth = getMeasuredWidth() - getPaddingRight() - getPaddingLeft();
int availableLineWidth = lineWidth;
int lineChildIndex = 0;
int lineMaxHeight = 0;
for (int i = 0; i < count; i++) {
View child = getChildAt(i);
int childWidth = child.getMeasuredWidth();
int childHeight = child.getMeasuredHeight();
int needWidth = i == 0 ? childWidth : (childWidth + mHorizontalSpacing);
if (availableLineWidth < needWidth) {
availableLineWidth = lineWidth;
childTop += lineMaxHeight;
if (i > 0) childTop += mVerticalSpacing;
lineMaxHeight = 0;
childLeft = getPaddingLeft();
lineChildIndex = 0;
}
int realNeedWidth = lineChildIndex == 0 ? childWidth : (childWidth + mHorizontalSpacing);
lineMaxHeight = Math.max(lineMaxHeight, childHeight);
child.layout(childLeft + realNeedWidth - childWidth, childTop, childLeft + realNeedWidth, childTop + childHeight);
availableLineWidth -= realNeedWidth;
childLeft += realNeedWidth;
lineChildIndex++;
}
}
public int getHorizontalSpacing() {
return mHorizontalSpacing;
}
public void setHorizontalSpacing(int horizontalSpacing) {
mHorizontalSpacing = horizontalSpacing;
}
public int getVerticalSpacing() {
return mVerticalSpacing;
}
public void setVerticalSpacing(int verticalSpacing) {
mVerticalSpacing = verticalSpacing;
}
}
