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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.camera.ui;
import com.android.camera.ListPreference;
import com.android.camera.R;
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.view.accessibility.AccessibilityEvent;
import android.widget.Button;
import android.widget.TextView;
/* A knob setting control. */
public class InLineSettingKnob extends InLineSettingItem {
private final String TAG = "InLineSettingKnob";
private boolean mNext, mPrevious;
private Button mPrevButton, mNextButton;
private Handler mHandler;
// The view that shows the current selected setting. Ex: 5MP
private TextView mEntry;
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 InLineSettingKnob(Context context, AttributeSet attrs) {
super(context, attrs);
mHandler = new Handler();
}
OnTouchListener mNextTouchListener = 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 mPreviousTouchListener = 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;
}
};
@Override
protected void onFinishInflate() {
super.onFinishInflate();
mNextButton = (Button) findViewById(R.id.increment);
mNextButton.setOnTouchListener(mNextTouchListener);
mPrevButton = (Button) findViewById(R.id.decrement);
mPrevButton.setOnTouchListener(mPreviousTouchListener);
mEntry = (TextView) findViewById(R.id.current_setting);
}
@Override
public void initialize(ListPreference preference) {
super.initialize(preference);
// Add content descriptions for the increment and decrement buttons.
mNextButton.setContentDescription(getResources().getString(
R.string.accessibility_increment, mPreference.getTitle()));
mPrevButton.setContentDescription(getResources().getString(
R.string.accessibility_decrement, mPreference.getTitle()));
}
protected 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);
}
}
@Override
public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
onPopulateAccessibilityEvent(event);
return true;
}
@Override
public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
super.onPopulateAccessibilityEvent(event);
event.getText().add(mPreference.getTitle() + mPreference.getEntry());
}
}
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