104 lines
2.7 KiB
Java
104 lines
2.7 KiB
Java
package jp.juggler.subwaytooter;
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import android.app.Activity;
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import android.support.v4.view.PagerAdapter;
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import android.support.v4.view.ViewPager;
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import android.util.SparseArray;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import java.util.ArrayList;
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public class ColumnPagerAdapter extends PagerAdapter{
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final ActMain activity;
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final LayoutInflater inflater;
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boolean loop_mode = false;
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ColumnPagerAdapter( ActMain activity ){
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this.activity = activity;
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this.inflater = activity.getLayoutInflater();
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}
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final ArrayList<Column> column_list = new ArrayList<>();
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final SparseArray<ColumnViewHolder> holder_list = new SparseArray<>();
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int addColumn( ViewPager pager, Column column ){
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int size = column_list.size();
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if( size == 0 ){
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column_list.add( column );
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notifyDataSetChanged();
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return 0;
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}else{
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int idx = 1+pager.getCurrentItem();
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column_list.add( idx, column );
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notifyDataSetChanged();
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pager.setCurrentItem( idx );
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return idx;
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}
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}
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public void removeColumn( ViewPager pager,Column column ){
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int idx_column = column_list.indexOf( column );
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if( idx_column == - 1 ) return;
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int idx_showing = pager.getCurrentItem();
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pager.setAdapter( null );
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column_list.remove( idx_column );
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pager.setAdapter( this );
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pager.setCurrentItem( idx_showing >= column_list.size() ? idx_showing -1 : idx_showing );
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}
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public Column getColumn( int idx ){
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return column_list.get( idx );
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}
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public ColumnViewHolder getColumnViewHolder( int idx ){
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return holder_list.get( idx );
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}
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@Override public int getCount(){
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return column_list.size();
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}
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@Override public CharSequence getPageTitle( int page_idx ){
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return "page"+ page_idx;
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}
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@Override
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public boolean isViewFromObject( View view, Object object ){
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return view == object;
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}
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@Override public Object instantiateItem( ViewGroup container, int page_idx ){
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View root = inflater.inflate( R.layout.page_column, container, false );
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container.addView( root, 0 );
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Column column = column_list.get( page_idx );
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ColumnViewHolder holder = new ColumnViewHolder( activity,column, page_idx );
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//
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holder_list.put( page_idx, holder );
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//
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holder.onPageCreate( root );
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return root;
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}
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@Override public void destroyItem( ViewGroup container, int page_idx, Object object ){
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View view = (View) object;
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//
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container.removeView( view );
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//
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ColumnViewHolder holder = holder_list.get( page_idx );
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holder_list.remove( page_idx );
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if( holder != null ){
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holder.is_destroyed.set( true );
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holder.onPageDestroy( view );
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}
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}
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} |