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/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
package org.libreoffice.impressremote.adapter;
import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import org.libreoffice.impressremote.R;
import org.libreoffice.impressremote.communication.SlideShow;
import org.libreoffice.impressremote.util.ImageLoader;
public class SlidesPagerAdapter extends PagerAdapter {
private final LayoutInflater mLayoutInflater;
private final ImageLoader mImageLoader;
private final SlideShow mSlideShow;
private final View.OnClickListener mSlideClickListener;
public SlidesPagerAdapter(Context aContext, SlideShow aSlideShow, View.OnClickListener aSlideClickListener) {
mLayoutInflater = LayoutInflater.from(aContext);
mImageLoader = new ImageLoader(aContext.getResources(), R.drawable.slide_unknown);
mSlideShow = aSlideShow;
mSlideClickListener = aSlideClickListener;
}
@Override
public int getCount() {
return mSlideShow.getSlidesCount();
}
@Override
public Object instantiateItem(ViewGroup aViewGroup, int aPosition) {
ImageView aSlideView = (ImageView) getView(aViewGroup);
if (isSlidePreviewAvailable(aPosition)) {
setUpSlidePreview(aSlideView, aPosition);
}
else {
setUpUnknownSlidePreview(aSlideView);
}
// ViewPager itself cannot handle click events,
// so we need to use hacks. Android is good.
aSlideView.setOnClickListener(mSlideClickListener);
aViewGroup.addView(aSlideView);
return aSlideView;
}
private View getView(ViewGroup aViewGroup) {
return mLayoutInflater.inflate(R.layout.view_pager_slide, aViewGroup, false);
}
private boolean isSlidePreviewAvailable(int aSlideIndex) {
return mSlideShow.getSlidePreviewBytes(aSlideIndex) != null;
}
private void setUpSlidePreview(ImageView aSlideView, int aPosition) {
byte[] aSlidePreviewBytes = mSlideShow.getSlidePreviewBytes(aPosition);
mImageLoader.loadImage(aSlideView, aSlidePreviewBytes);
}
private void setUpUnknownSlidePreview(ImageView aSlideView) {
aSlideView.setImageResource(R.drawable.slide_unknown);
}
@Override
public void destroyItem(ViewGroup aViewGroup, int aPosition, Object aObject) {
View aView = (View) aObject;
aViewGroup.removeView(aView);
}
@Override
public boolean isViewFromObject(View aView, Object aObject) {
return aView == aObject;
}
@Override
public int getItemPosition(Object aObject) {
// There seems no other way to update slides with notifyDataSetChanged.
return POSITION_NONE;
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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