|
|
|
/*
|
|
|
|
* Copyright 2010-2018 Eric Kok et al.
|
|
|
|
*
|
|
|
|
* Transdroid 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.
|
|
|
|
*
|
|
|
|
* Transdroid 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 Transdroid. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
*/
|
|
|
|
package org.transdroid.core.gui.lists;
|
|
|
|
|
|
|
|
import android.view.View;
|
|
|
|
import android.view.ViewGroup;
|
|
|
|
import android.widget.BaseAdapter;
|
|
|
|
import android.widget.ListView;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* A simple wrapper adapter around a single view, typically for use in a {@link MergeAdapter}. Notably, this adapter
|
|
|
|
* handles the proper showing or hiding of the view according to the contained view's visibility if
|
|
|
|
* {@link #setViewVisibility(int)} is used on this adapter rather than setting the visibility of the view directly on
|
|
|
|
* the view object. This is required since otherwise the adapter's consumer (i.e. a {@link ListView}) does not update
|
|
|
|
* the list row accordingly. Use {@link #setViewEnabled(boolean)} to enable or disable this contained view for user
|
|
|
|
* interaction.
|
|
|
|
*
|
|
|
|
* @author Eric Kok
|
|
|
|
*/
|
|
|
|
public class ViewHolderAdapter extends BaseAdapter {
|
|
|
|
|
|
|
|
private final View view;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Instantiates this wrapper adapter with the one and only view to show. It can not be updated and view visibility
|
|
|
|
* should be set directly on this adapter using {@link #setViewVisibility(int)}. Use
|
|
|
|
* {@link #setViewEnabled(boolean)} to enable or disable this contained view for user interaction.
|
|
|
|
*
|
|
|
|
* @param view The view that will be wrapper in an adapter to show in a list view
|
|
|
|
*/
|
|
|
|
public ViewHolderAdapter(View view) {
|
|
|
|
this.view = view;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Sets the visibility on the contained view and notifies consumers of this adapter (i.e. a {@link ListView})
|
|
|
|
* accordingly. Use {@link View#GONE} to hide this adapter's view altogether.
|
|
|
|
*
|
|
|
|
* @param visibility The visibility to set on the contained view
|
|
|
|
*/
|
|
|
|
public void setViewVisibility(int visibility) {
|
|
|
|
view.setVisibility(visibility);
|
|
|
|
notifyDataSetChanged();
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Sets whether the contained view should be enabled and notifies consumers of this adapter (i.e. a {@link ListView}
|
|
|
|
* ) accordingly. A contained enabled view allows user interaction (clicks, focus), while a disabled view does not.
|
|
|
|
*
|
|
|
|
* @param enabled Whether the contained view should be enabled
|
|
|
|
*/
|
|
|
|
public void setViewEnabled(boolean enabled) {
|
|
|
|
view.setEnabled(enabled);
|
|
|
|
notifyDataSetChanged();
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Returns 1 if the contained view is {@link View#VISIBLE} or {@link View#INVISIBLE}, return 0 if {@link View#GONE}.
|
|
|
|
*/
|
|
|
|
@Override
|
|
|
|
public int getCount() {
|
|
|
|
return view.getVisibility() == View.VISIBLE ? 1 : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Always directly returns the single contained view instance.
|
|
|
|
*/
|
|
|
|
@Override
|
|
|
|
public Object getItem(int position) {
|
|
|
|
return view;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Always returns the position directly as item id.
|
|
|
|
*/
|
|
|
|
@Override
|
|
|
|
public long getItemId(int position) {
|
|
|
|
return position;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Always directly returns the single contained view instance.
|
|
|
|
*/
|
|
|
|
@Override
|
|
|
|
public View getView(int position, View convertView, ViewGroup parent) {
|
|
|
|
return view;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Always returns true, as there is only one contained item and it is never changed.
|
|
|
|
*/
|
|
|
|
@Override
|
|
|
|
public boolean hasStableIds() {
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Returns false, as the contained view can still be enabled and disabled.
|
|
|
|
*/
|
|
|
|
@Override
|
|
|
|
public boolean areAllItemsEnabled() {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Returns true if the contained view is enabled, returns false otherwise.
|
|
|
|
*/
|
|
|
|
@Override
|
|
|
|
public boolean isEnabled(int position) {
|
|
|
|
return view.isEnabled();
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|