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using System;
using System.Collections.Generic;
using System.Linq;
using Android.Content;
using Android.Util;
using Android.Views;
using Android.Widget;
namespace Mono.Samples.LabelledSections
{
class SeparatedListAdapter : BaseAdapter
{
public SeparatedListAdapter (Context context)
{
headers = new ArrayAdapter<string> (context, Resource.Layout.ListHeader);
}
Dictionary<string, IAdapter> sections = new Dictionary<string, IAdapter> ();
ArrayAdapter<string> headers;
const int TypeSectionHeader = 0;
public void AddSection (string section, IAdapter adapter)
{
headers.Add (section);
sections.Add (section, adapter);
}
public override Java.Lang.Object GetItem (int position)
{
int op = position;
foreach (var section in sections.Keys) {
var adapter = sections [section];
int size = adapter.Count + 1;
if (position == 0)
return section;
if (position < size)
return adapter.GetItem (position - 1);
position -= size;
}
return null;
}
public override int Count {
get {
return sections.Values.Sum (adapter => adapter.Count + 1);
}
}
public override int ViewTypeCount {
get {
return 1 + sections.Values.Sum (adapter => adapter.ViewTypeCount);
}
}
public override int GetItemViewType (int position)
{
int type = 1;
foreach (var section in sections.Keys) {
var adapter = sections [section];
int size = adapter.Count + 1;
// check if position inside this section
if (position == 0)
return TypeSectionHeader;
if (position < size)
return type + adapter.GetItemViewType (position - 1);
// otherwise jump into next section
position -= size;
type += adapter.ViewTypeCount;
}
return -1;
}
public override bool AreAllItemsEnabled ()
{
return false;
}
public override bool IsEnabled (int position)
{
return (GetItemViewType (position) != TypeSectionHeader);
}
public override View GetView(int position, View convertView, ViewGroup parent) {
int sectionnum = 0;
foreach (var section in sections.Keys) {
var adapter = sections [section];
int size = adapter.Count + 1;
// check if position inside this section
if (position == 0)
return headers.GetView (sectionnum, convertView, parent);
if (position < size)
return adapter.GetView (position - 1, convertView, parent);
// otherwise jump into next section
position -= size;
sectionnum++;
}
return null;
}
public override long GetItemId(int position)
{
return position;
}
}
}
#if false
public class SeparatedListAdapter extends BaseAdapter {
public final Map<String, Adapter> sections = new LinkedHashMap<String, Adapter>();
public final ArrayAdapter<String> headers;
public final static int TYPE_SECTION_HEADER = 0;
public SeparatedListAdapter(Context context) {
headers = new ArrayAdapter<String>(context, R.layout.list_header);
}
public void addSection(String section, Adapter adapter) {
this.headers.add(section);
this.sections.put(section, adapter);
}
public Object getItem(int position) {
for (Object section : this.sections.keySet()) {
Adapter adapter = sections.get(section);
int size = adapter.getCount() + 1;
// check if position inside this section
if (position == 0)
return section;
if (position < size)
return adapter.getItem(position - 1);
// otherwise jump into next section
position -= size;
}
return null;
}
public int getCount() {
// total together all sections, plus one for each section header
int total = 0;
for (Adapter adapter : this.sections.values())
total += adapter.getCount() + 1;
return total;
}
public int getViewTypeCount() {
// assume that headers count as one, then total all sections
int total = 1;
for (Adapter adapter : this.sections.values())
total += adapter.getViewTypeCount();
return total;
}
public int getItemViewType(int position) {
int type = 1;
for (Object section : this.sections.keySet()) {
Adapter adapter = sections.get(section);
int size = adapter.getCount() + 1;
// check if position inside this section
if (position == 0)
return TYPE_SECTION_HEADER;
if (position < size)
return type + adapter.getItemViewType(position - 1);
// otherwise jump into next section
position -= size;
type += adapter.getViewTypeCount();
}
return -1;
}
public boolean areAllItemsSelectable() {
return false;
}
public boolean isEnabled(int position) {
return (getItemViewType(position) != TYPE_SECTION_HEADER);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
int sectionnum = 0;
for (Object section : this.sections.keySet()) {
Adapter adapter = sections.get(section);
int size = adapter.getCount() + 1;
// check if position inside this section
if (position == 0)
return headers.getView(sectionnum, convertView, parent);
if (position < size)
return adapter.getView(position - 1, convertView, parent);
// otherwise jump into next section
position -= size;
sectionnum++;
}
return null;
}
@Override
public long getItemId(int position) {
return position;
}
}
#endif
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