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/*
This file is part of Subsonic.
Subsonic 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.
Subsonic 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 Subsonic. If not, see <http://www.gnu.org/licenses/>.
Copyright 2015 (C) Scott Jackson
*/
package github.daneren2005.dsub.adapter;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import github.daneren2005.dsub.R;
import github.daneren2005.dsub.util.DrawableTint;
import github.daneren2005.dsub.view.BasicHeaderView;
import github.daneren2005.dsub.view.UpdateView;
public abstract class ExpandableSectionAdapter<T> extends SectionAdapter<T> {
private static final int DEFAULT_VISIBLE = 4;
private static final int EXPAND_TOGGLE = R.attr.select_server;
private static final int COLLAPSE_TOGGLE = R.attr.select_tabs;
protected List<Integer> sectionsDefaultVisible;
protected List<List<T>> sectionsExtras;
protected int expandToggleRes;
protected int collapseToggleRes;
protected ExpandableSectionAdapter() {}
public ExpandableSectionAdapter(Context context, List<T> section) {
List<List<T>> sections = new ArrayList<>();
sections.add(section);
init(context, Collections.singletonList("Section"), sections, Collections.singletonList((Integer) null));
}
public ExpandableSectionAdapter(Context context, List<String> headers, List<List<T>> sections, List<Integer> sectionsDefaultVisible) {
init(context, headers, sections, sectionsDefaultVisible);
}
protected void init(Context context, List<String> headers, List<List<T>> fullSections, List<Integer> sectionsDefaultVisible) {
this.context = context;
this.headers = headers;
this.sectionsDefaultVisible = sectionsDefaultVisible;
if(sectionsDefaultVisible == null) {
sectionsDefaultVisible = new ArrayList<>(fullSections.size());
for(int i = 0; i < fullSections.size(); i++) {
sectionsDefaultVisible.add(DEFAULT_VISIBLE);
}
}
this.sections = new ArrayList<>();
this.sectionsExtras = new ArrayList<>();
int i = 0;
for(List<T> fullSection: fullSections) {
List<T> visibleSection = new ArrayList<>();
Integer defaultVisible = sectionsDefaultVisible.get(i);
if(defaultVisible == null || defaultVisible >= fullSection.size()) {
visibleSection.addAll(fullSection);
this.sectionsExtras.add(null);
} else {
visibleSection.addAll(fullSection.subList(0, defaultVisible));
this.sectionsExtras.add(fullSection.subList(defaultVisible, fullSection.size()));
}
this.sections.add(visibleSection);
i++;
}
expandToggleRes = DrawableTint.getDrawableRes(context, EXPAND_TOGGLE);
collapseToggleRes = DrawableTint.getDrawableRes(context, COLLAPSE_TOGGLE);
}
@Override
public UpdateView.UpdateViewHolder onCreateHeaderHolder(ViewGroup parent) {
return new UpdateView.UpdateViewHolder(new BasicHeaderView(context, R.layout.expandable_header));
}
@Override
public void onBindHeaderHolder(UpdateView.UpdateViewHolder holder, String header, final int sectionIndex) {
UpdateView view = holder.getUpdateView();
ImageView toggleSelectionView = (ImageView) view.findViewById(R.id.item_select);
List<T> visibleSelection = sections.get(sectionIndex);
List<T> sectionExtras = sectionsExtras.get(sectionIndex);
if(sectionExtras != null && !sectionExtras.isEmpty()) {
toggleSelectionView.setVisibility(View.VISIBLE);
toggleSelectionView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
List<T> visibleSelection = sections.get(sectionIndex);
List<T> sectionExtras = sectionsExtras.get(sectionIndex);
// Update icon
int selectToggleAttr;
if (!visibleSelection.contains(sectionExtras.get(0))) {
selectToggleAttr = COLLAPSE_TOGGLE;
// Update how many are displayed
int lastIndex = getItemPosition(visibleSelection.get(visibleSelection.size() - 1));
visibleSelection.addAll(sectionExtras);
notifyItemRangeInserted(lastIndex, sectionExtras.size());
} else {
selectToggleAttr = EXPAND_TOGGLE;
// Update how many are displayed
visibleSelection.removeAll(sectionExtras);
int lastIndex = getItemPosition(visibleSelection.get(visibleSelection.size() - 1));
notifyItemRangeRemoved(lastIndex, sectionExtras.size());
}
((ImageView) v).setImageResource(DrawableTint.getDrawableRes(context, selectToggleAttr));
}
});
int selectToggleAttr;
if (!visibleSelection.contains(sectionExtras.get(0))) {
selectToggleAttr = EXPAND_TOGGLE;
} else {
selectToggleAttr = COLLAPSE_TOGGLE;
}
toggleSelectionView.setImageResource(DrawableTint.getDrawableRes(context, selectToggleAttr));
} else {
toggleSelectionView.setVisibility(View.GONE);
}
view.setObject(header);
}
}
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