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/*
* Copyright (C) 2010 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.gallery3d.photoeditor;
import android.content.Context;
import android.content.res.Configuration;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.FrameLayout;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map.Entry;
/**
* View that holds a single child and could be recreated/restored after orientation changes.
*/
public abstract class RestorableView extends FrameLayout {
private final HashMap<Integer, Runnable> clickRunnables = new HashMap<Integer, Runnable>();
private final HashSet<Integer> changedViews = new HashSet<Integer>();
private final LayoutInflater inflater;
public RestorableView(Context context, AttributeSet attrs) {
super(context, attrs);
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
protected abstract int childLayoutId();
private void recreateChildView() {
if (getChildCount() != 0) {
removeAllViews();
}
inflater.inflate(childLayoutId(), this, true);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
recreateChildView();
}
@Override
protected void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Remember the removing child before recreating the child.
View view = getChildAt(0);
recreateChildView();
// Restore its runnables and status of views that have been changed.
for (Entry<Integer, Runnable> entry : clickRunnables.entrySet()) {
setClickRunnable(entry.getKey(), entry.getValue());
}
for (int id : changedViews) {
View changed = view.findViewById(id);
setViewEnabled(id, changed.isEnabled());
setViewSelected(id, changed.isSelected());
}
}
public void setClickRunnable(int id, final Runnable r) {
findViewById(id).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (isEnabled()) {
r.run();
}
}
});
clickRunnables.put(id, r);
}
public void setViewEnabled(int id, boolean enabled) {
findViewById(id).setEnabled(enabled);
// Track views whose enabled status has been updated.
changedViews.add(id);
}
public void setViewSelected(int id, boolean selected) {
findViewById(id).setSelected(selected);
// Track views whose selected status has been updated.
changedViews.add(id);
}
}
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