com.vuze.android.widget.SwipeRefreshLayoutExtra.java Source code

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Here is the source code for com.vuze.android.widget.SwipeRefreshLayoutExtra.java

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/*
 * Copyright (c) Azureus Software, Inc, All Rights Reserved.
 *
 * 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

package com.vuze.android.widget;

import android.content.Context;
import android.support.v4.widget.SwipeRefreshLayout;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;

import com.vuze.android.remote.AndroidUtils;

/**
 * A SwipeRefreshLayout with an extra view undernear the refresh circle.
 *
 * Sorta crappy.  Should just really take the SwipeRefreshLayout and add
 * to it instead of hacking
 */
public class SwipeRefreshLayoutExtra extends SwipeRefreshLayout {
    private static final String TAG = "SwipeLayoutExtra";

    private static final boolean DEBUG_FOLLOW_THE_CIRLCE_HACK = false;

    ImageView mCircleView;

    private OnExtraViewVisibilityChangeListener listenerOnExtraViewVisiblityChange;

    private View mExtraView;

    public SwipeRefreshLayoutExtra(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public SwipeRefreshLayoutExtra(Context context) {
        super(context);
    }

    public void setExtraLayout(int layoutID) {
        LayoutInflater factory = LayoutInflater.from(getContext());
        mExtraView = factory.inflate(layoutID, this, false);
        mExtraView.setVisibility(View.GONE);
    }

    public View getExtraView() {
        return mExtraView;
    }

    private ImageView findCircleView() {
        if (mExtraView == null) {
            return null;
        }
        if (mCircleView != null) {
            return mCircleView;
        }
        for (int i = 0; i < getChildCount(); i++) {
            View child = getChildAt(i);
            if (child instanceof ImageView) {
                mCircleView = (ImageView) child;
                break;
            }
        }
        if (mExtraView.getParent() == null) {
            addView(mExtraView, -1);
            mExtraView.bringToFront();
        }

        return mCircleView;
    }

    @Override
    public void invalidate() {
        super.invalidate();
        ImageView circleView = findCircleView();
        if (circleView != null) {
            layoutExtra(circleView);
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        boolean b = super.onTouchEvent(ev);

        // Mostly needed for older APIs (8)
        ImageView circleView = findCircleView();
        if (circleView != null) {
            layoutExtra(circleView);
        }
        return b;
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
        if (mExtraView == null) {
            return;
        }

        ImageView circleView = findCircleView();
        if (circleView == null) {
            return;
        }

        layoutExtra(circleView);
    }

    private void layoutExtra(ImageView circleView) {
        if (mExtraView == null) {
            return;
        }
        final int width = getMeasuredWidth();

        int tvHeight = mExtraView.getMeasuredHeight();

        int circleHeight = circleView.getMeasuredHeight();
        int offset = circleView.getTop();

        int tvTop = offset + circleHeight;
        if (DEBUG_FOLLOW_THE_CIRLCE_HACK) {
            Log.d(TAG, "layoutExtra: " + tvTop + ";" + circleView.getVisibility());
        }
        mExtraView.layout(0, tvTop, width, tvTop + tvHeight);

        int visibility = mExtraView.getVisibility();
        int newVisibility = tvTop <= 0 ? View.GONE : View.VISIBLE;

        if (visibility != newVisibility) {
            if (DEBUG_FOLLOW_THE_CIRLCE_HACK) {
                Log.d(TAG, "layoutExtra: set " + (tvTop <= 0 ? "GONE" : "VISIBLE") + ";"
                        + AndroidUtils.getCompressedStackTrace());
            }
            mExtraView.setVisibility(newVisibility);
            if (listenerOnExtraViewVisiblityChange != null) {
                listenerOnExtraViewVisiblityChange.onExtraViewVisibilityChange(mExtraView, newVisibility);
            }
        }
    }

    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        if (mExtraView == null) {
            return;
        }
        if (mExtraView.getLayoutParams() == null) {
            return;
        }
        mExtraView.measure(getChildMeasureSpec(widthMeasureSpec, 0, mExtraView.getLayoutParams().width),
                getChildMeasureSpec(heightMeasureSpec, 0, mExtraView.getLayoutParams().height)

        );
    }

    public void setOnExtraViewVisibilityChange(OnExtraViewVisibilityChangeListener l) {
        listenerOnExtraViewVisiblityChange = l;
    }

    public interface OnExtraViewVisibilityChangeListener {
        void onExtraViewVisibilityChange(View view, int visibility);
    }

}