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