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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.camera.ui;
import android.content.Context;
import android.os.Handler;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.android.camera.R;
import com.android.camera.ListPreference;
/* A one-line camera setting that includes a title (ex: Picture size), a
previous button, the current value (ex: 5MP), and a next button. Other
setting popup window includes several InLineSettingPicker. */
public class InLineSettingPicker extends RelativeLayout {
private final String TAG = "InLineSettingPicker";
// The view that shows the name of the setting. Ex: Picture size
private TextView mTitle;
// The view that shows the current selected setting. Ex: 5MP
private TextView mEntry;
private Button mPrevButton, mNextButton;
private ListPreference mPreference;
private boolean mNext, mPrevious;
private int mIndex;
private String mKey;
private Listener mListener;
// Scene mode can override the original preference value.
private String mOverrideValue;
static public interface Listener {
public void onSettingChanged();
}
private Handler mHandler;
private final Runnable mRunnable = new Runnable() {
public void run() {
if (mNext) {
if (changeIndex(mIndex - 1)) {
mHandler.postDelayed(this, 100);
}
} else if (mPrevious) {
if (changeIndex(mIndex + 1)) {
mHandler.postDelayed(this, 100);
}
}
}
};
public InLineSettingPicker(Context context, AttributeSet attrs) {
super(context, attrs);
mHandler = new Handler();
}
@Override
public void onFinishInflate() {
super.onFinishInflate();
OnTouchListener nextTouchListener = new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (mOverrideValue != null) return true;
if (event.getAction() == MotionEvent.ACTION_DOWN) {
if (!mNext && changeIndex(mIndex - 1)) {
mNext = true;
// Give bigger delay so users can change only one step.
mHandler.postDelayed(mRunnable, 300);
}
} else if (event.getAction() == MotionEvent.ACTION_UP
|| event.getAction() == MotionEvent.ACTION_CANCEL) {
mNext = false;
}
return false;
}
};
OnTouchListener previousTouchListener = new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (mOverrideValue != null) return true;
if (event.getAction() == MotionEvent.ACTION_DOWN) {
if (!mPrevious && changeIndex(mIndex + 1)) {
mPrevious = true;
// Give bigger delay so users can change only one step.
mHandler.postDelayed(mRunnable, 300);
}
} else if (event.getAction() == MotionEvent.ACTION_UP
|| event.getAction() == MotionEvent.ACTION_CANCEL) {
mPrevious = false;
}
return false;
}
};
mNextButton = (Button) findViewById(R.id.increment);
mNextButton.setOnTouchListener(nextTouchListener);
mPrevButton = (Button) findViewById(R.id.decrement);
mPrevButton.setOnTouchListener(previousTouchListener);
mEntry = (TextView) findViewById(R.id.current_setting);
mTitle = (TextView) findViewById(R.id.title);
}
public void initialize(ListPreference preference) {
mPreference = preference;
reloadPreference();
}
// The value of the preference may have changed. Update the UI.
public void reloadPreference() {
mIndex = mPreference.findIndexOfValue(mPreference.getValue());
updateView();
}
private boolean changeIndex(int index) {
if (index >= mPreference.getEntryValues().length || index < 0) return false;
mIndex = index;
mPreference.setValueIndex(mIndex);
if (mListener != null) {
mListener.onSettingChanged();
}
updateView();
return true;
}
private void updateView() {
if (mOverrideValue == null) {
mEntry.setText(mPreference.getEntry());
mNextButton.setVisibility(mIndex == 0 ? View.INVISIBLE : View.VISIBLE);
mPrevButton.setVisibility(mIndex == mPreference.getEntryValues().length - 1
? View.INVISIBLE : View.VISIBLE);
} else {
int index = mPreference.findIndexOfValue(mOverrideValue);
if (index != -1) {
mEntry.setText(mPreference.getEntries()[index]);
} else {
// Avoid the crash if camera driver has bugs.
Log.e(TAG, "Fail to find override value=" + mOverrideValue);
mPreference.print();
}
mNextButton.setVisibility(View.INVISIBLE);
mPrevButton.setVisibility(View.INVISIBLE);
}
}
public void setSettingChangedListener(Listener listener) {
mListener = listener;
}
public void overrideSettings(String value) {
mOverrideValue = value;
updateView();
}
}
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