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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.browser.addbookmark;
import android.content.Context;
import android.view.View;
import android.util.AttributeSet;
import android.widget.AdapterView;
import android.widget.Spinner;
/**
* Special Spinner class with its own callback for when the selection is set, which
* can be ignored by calling setSelectionIgnoringSelectionChange
*/
public class FolderSpinner extends Spinner
implements AdapterView.OnItemSelectedListener {
private OnSetSelectionListener mOnSetSelectionListener;
private boolean mFireSetSelection;
/**
* Callback for knowing when the selection has been manually set. Does not
* get called until the selected view has changed.
*/
public interface OnSetSelectionListener {
public void onSetSelection(long id);
}
public FolderSpinner(Context context, AttributeSet attrs) {
super(context, attrs);
super.setOnItemSelectedListener(this);
}
@Override
public void setOnItemSelectedListener(AdapterView.OnItemSelectedListener l) {
// Disallow setting an OnItemSelectedListener, since it is used by us
// to fire onSetSelection.
throw new RuntimeException("Cannot set an OnItemSelectedListener on a FolderSpinner");
}
public void setOnSetSelectionListener(OnSetSelectionListener l) {
mOnSetSelectionListener = l;
}
/**
* Call setSelection, without firing the callback
* @param position New position to select.
*/
public void setSelectionIgnoringSelectionChange(int position) {
super.setSelection(position);
}
@Override
public void setSelection(int position) {
mFireSetSelection = true;
int oldPosition = getSelectedItemPosition();
super.setSelection(position);
if (mOnSetSelectionListener != null) {
if (oldPosition == position) {
long id = getAdapter().getItemId(position);
// Normally this is not called because the item did not actually
// change, but in this case, we still want it to be called.
onItemSelected(this, null, position, id);
}
}
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
if (mFireSetSelection) {
mOnSetSelectionListener.onSetSelection(id);
mFireSetSelection = false;
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {}
}
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