101 lines
2.8 KiB
Java
101 lines
2.8 KiB
Java
package com.mobeta.android.dslv;
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import android.content.Context;
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import android.view.Gravity;
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import android.view.View;
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import android.view.View.MeasureSpec;
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import android.view.ViewGroup;
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import android.widget.AbsListView;
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import timber.log.Timber;
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/**
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* Lightweight ViewGroup that wraps list items obtained from user's
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* ListAdapter. ItemView expects a single child that has a definite
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* height (i.e. the child's layout height is not MATCH_PARENT).
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* The width of
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* ItemView will always match the width of its child (that is,
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* the width MeasureSpec given to ItemView is passed directly
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* to the child, and the ItemView measured width is set to the
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* child's measured width). The height of ItemView can be anything;
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* the
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*
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*
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* The purpose of this class is to optimize slide
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* shuffle animations.
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*/
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public class DragSortItemView extends ViewGroup {
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private int mGravity = Gravity.TOP;
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public DragSortItemView(Context context) {
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super(context);
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// always init with standard ListView layout params
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setLayoutParams(new AbsListView.LayoutParams(
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ViewGroup.LayoutParams.FILL_PARENT,
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ViewGroup.LayoutParams.WRAP_CONTENT));
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//setClipChildren(true);
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}
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public void setGravity(int gravity) {
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mGravity = gravity;
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}
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public int getGravity() {
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return mGravity;
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}
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@Override
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protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
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final View child = getChildAt(0);
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if (child == null) {
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return;
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}
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if (mGravity == Gravity.TOP) {
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child.layout(0, 0, getMeasuredWidth(), child.getMeasuredHeight());
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} else {
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child.layout(0, getMeasuredHeight() - child.getMeasuredHeight(), getMeasuredWidth(), getMeasuredHeight());
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}
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}
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/**
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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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int height = MeasureSpec.getSize(heightMeasureSpec);
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int width = MeasureSpec.getSize(widthMeasureSpec);
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int heightMode = MeasureSpec.getMode(heightMeasureSpec);
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final View child = getChildAt(0);
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if (child == null) {
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setMeasuredDimension(0, width);
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return;
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}
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if (child.isLayoutRequested()) {
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// Always let child be as tall as it wants.
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measureChild(child, widthMeasureSpec,
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MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
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}
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if (heightMode == MeasureSpec.UNSPECIFIED) {
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ViewGroup.LayoutParams lp = getLayoutParams();
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if (lp.height > 0) {
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height = lp.height;
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} else {
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height = child.getMeasuredHeight();
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}
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}
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setMeasuredDimension(width, height);
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}
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}
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