/* ownCloud Android client application

* Copyright (C) 2012 Bartek Przybylski

* Copyright (C) 2012-2013 ownCloud Inc.

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License version 2,

* as published by the Free Software Foundation.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <http://www.gnu.org/licenses/>.

*

*/

package com.owncloud.android.ui;

import android.content.Context;

import android.graphics.Canvas;

import android.util.AttributeSet;

import android.widget.ListView;

/**

* ListView allowing to specify the position of an item that should be centered in the visible area, if possible.

*

* The cleanest way I found to overcome the problem due to getHeight() returns 0 until the view is really drawn.

*

* @author David A. Velasco

*/

public class ExtendedListView extends ListView {

private int mPositionToSetAndCenter;

public ExtendedListView(Context context) {

super(context);

}

public ExtendedListView(Context context, AttributeSet attrs) {

super(context, attrs);

}

public ExtendedListView(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

}

/**

* {@inheritDoc}

*

*

*/

@Override

protected void onDraw (Canvas canvas) {

super.onDraw(canvas);

if (mPositionToSetAndCenter > 0) {

this.setSelectionFromTop(mPositionToSetAndCenter, getHeight() / 2);

mPositionToSetAndCenter = 0;

}

}

/**

* Public method to set the position of the item that should be centered in the visible area of the view.

*

* The position is saved here and checked in onDraw().

*

* @param position Position (in the list of items) of the item to center in the visible area.

*/

public void setAndCenterSelection(int position) {

mPositionToSetAndCenter = position;

}

}