OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/ListAwareSwipeRefreshLayout.java


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/*
 * Copyright (C) 2014 Daniel Albert
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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 org.sufficientlysecure.keychain.ui.widget;

import android.content.Context;
import android.support.v4.widget.SwipeRefreshLayout;
import android.util.AttributeSet;

import org.sufficientlysecure.keychain.util.Log;

import se.emilsjolander.stickylistheaders.StickyListHeadersListView;

public class ListAwareSwipeRefreshLayout extends SwipeRefreshLayout {


    private StickyListHeadersListView mStickyListHeadersListView = null;
    private boolean mIsLocked = false;

    /**
     * Constructors
     */
    public ListAwareSwipeRefreshLayout(Context context) {
        super(context);
    }
    public ListAwareSwipeRefreshLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    /**
     * Getters / Setters
     */
    public void setStickyListHeadersListView(StickyListHeadersListView stickyListHeadersListView) {
        mStickyListHeadersListView = stickyListHeadersListView;
    }
    public StickyListHeadersListView getStickyListHeadersListView() {
        return mStickyListHeadersListView;
    }

    public void setIsLocked(boolean locked) {
        mIsLocked = locked;
        Log.d("ListAwareSwipeRefreshLayout", (mIsLocked ? "is locked" : "not locked"));
    }
    public boolean getIsLocked() {
        return mIsLocked;
    }

    @Override
    public boolean canChildScrollUp() {
        if (mStickyListHeadersListView == null)
            return super.canChildScrollUp();

        return (
            mIsLocked
            ||
            (
                mStickyListHeadersListView.getWrappedList().getChildCount() > 0
                &&
                (
                    mStickyListHeadersListView.getTop() > 0
                    ||
                    mStickyListHeadersListView.getFirstVisiblePosition() > 0
                )
            )
        );
    }
}