parent
cad060282b
commit
887e68700a
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package com.keylesspalace.tusky; |
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import android.content.Context; |
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import android.content.res.TypedArray; |
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import android.util.AttributeSet; |
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import android.view.View; |
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import android.view.ViewGroup; |
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public class FlowLayout extends ViewGroup { |
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private int paddingHorizontal; // internal padding between child views
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private int paddingVertical; //
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private int totalHeight; |
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public FlowLayout(Context context, AttributeSet attrs) { |
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this(context, attrs, 0); |
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} |
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public FlowLayout(Context context, AttributeSet attrs, int defStyle) { |
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super(context, attrs, defStyle); |
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TypedArray a = context.getTheme().obtainStyledAttributes( |
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attrs, R.styleable.FlowLayout, 0, 0); |
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try { |
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paddingHorizontal = a.getDimensionPixelSize( |
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R.styleable.FlowLayout_paddingHorizontal, 0); |
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paddingVertical = a.getDimensionPixelSize(R.styleable.FlowLayout_paddingVertical, 0); |
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} finally { |
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a.recycle(); |
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} |
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} |
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@Override |
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
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assert (MeasureSpec.getMode(widthMeasureSpec) != MeasureSpec.UNSPECIFIED); |
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int width = MeasureSpec.getSize(widthMeasureSpec) - getPaddingLeft() - getPaddingRight(); |
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int height = MeasureSpec.getSize(heightMeasureSpec) - getPaddingTop() - getPaddingBottom(); |
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int count = getChildCount(); |
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int x = getPaddingLeft(); |
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int y = getPaddingTop(); |
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int childHeightMeasureSpec; |
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if (MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.AT_MOST) { |
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childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.AT_MOST); |
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} else { |
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childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); |
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} |
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totalHeight = 0; |
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for (int i = 0; i < count; i++) { |
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View child = getChildAt(i); |
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if (child.getVisibility() != GONE) { |
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child.measure(MeasureSpec.makeMeasureSpec(width, MeasureSpec.AT_MOST), |
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childHeightMeasureSpec); |
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int childwidth = child.getMeasuredWidth(); |
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totalHeight = Math.max(totalHeight, child.getMeasuredHeight() + paddingVertical); |
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if (x + childwidth > width) { |
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x = getPaddingLeft(); |
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y += totalHeight; |
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} |
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x += childwidth + paddingHorizontal; |
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} |
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} |
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if (MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.UNSPECIFIED) { |
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height = y + totalHeight; |
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} else if (MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.AT_MOST) { |
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if (y + totalHeight < height) { |
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height = y + totalHeight; |
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} |
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} |
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height += 5; // Fudge to avoid clipping bottom of last row.
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setMeasuredDimension(width, height); |
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} |
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@Override |
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protected void onLayout(boolean changed, int l, int t, int r, int b) { |
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final int width = r - l; |
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int x = getPaddingLeft(); |
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int y = getPaddingTop(); |
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for (int i = 0; i < getChildCount(); i++) { |
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View child = getChildAt(i); |
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if (child.getVisibility() != GONE) { |
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int childWidth = child.getMeasuredWidth(); |
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int childHeight = child.getMeasuredHeight(); |
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if (x + childWidth > width) { |
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x = getPaddingLeft(); |
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y += totalHeight; |
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} |
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child.layout(x, y, x + childWidth, y + childHeight); |
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x += childWidth + paddingHorizontal; |
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} |
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} |
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} |
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} |
@ -0,0 +1,7 @@ |
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<?xml version="1.0" encoding="utf-8"?> |
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<resources> |
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<declare-styleable name="FlowLayout"> |
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<attr name="paddingHorizontal" format="dimension" /> |
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<attr name="paddingVertical" format="dimension" /> |
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</declare-styleable> |
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</resources> |
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