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/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.widget;
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import android.content.Context;
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import android.os.Handler;
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import android.text.InputFilter;
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import android.text.InputType;
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import android.text.Spanned;
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import android.text.method.NumberKeyListener;
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import android.util.AttributeSet;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.view.View.OnFocusChangeListener;
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import android.view.View.OnLongClickListener;
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import android.widget.EditText;
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import android.widget.LinearLayout;
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import android.widget.TextView;
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import com.zoffcc.applications.aagtl.R;
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/**
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* This class has been pulled from the Android platform source code, its an internal widget that hasn't been
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* made public so its included in the project in this fashion for use with the preferences screen; I have made
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* a few slight modifications to the code here, I simply put a MAX and MIN default in the code but these values
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* can still be set publically by calling code.
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*
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* @author Google
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*/
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public class NumberPicker extends LinearLayout
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implements
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OnClickListener,
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OnFocusChangeListener,
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OnLongClickListener
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{
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private static final String TAG = "NumberPicker";
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private static final int DEFAULT_MAX = 200;
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private static final int DEFAULT_MIN = 0;
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public interface OnChangedListener
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{
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void onChanged(NumberPicker picker, int oldVal, int newVal);
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}
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public interface Formatter
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{
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String toString(int value);
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}
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/*
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* Use a custom NumberPicker formatting callback to use two-digit
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* minutes strings like "01". Keeping a static formatter etc. is the
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* most efficient way to do this; it avoids creating temporary objects
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* on every call to format().
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*/
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public static final NumberPicker.Formatter TWO_DIGIT_FORMATTER = new NumberPicker.Formatter()
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{
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final StringBuilder mBuilder = new StringBuilder();
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final java.util.Formatter mFmt = new java.util.Formatter(
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mBuilder);
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final Object[] mArgs = new Object[1];
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public String toString(
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int value)
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{
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mArgs[0] = value;
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mBuilder
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.delete(
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0,
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mBuilder
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.length());
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mFmt.format("%02d",
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mArgs);
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return mFmt
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.toString();
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}
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};
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public static final NumberPicker.Formatter THREE_DIGIT_FORMATTER = new NumberPicker.Formatter()
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{
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final StringBuilder mBuilder = new StringBuilder();
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final java.util.Formatter mFmt = new java.util.Formatter(
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mBuilder);
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final Object[] mArgs = new Object[1];
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public String toString(
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int value)
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{
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mArgs[0] = value;
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mBuilder
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.delete(
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0,
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mBuilder
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.length());
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mFmt.format("%03d",
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mArgs);
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return mFmt
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.toString();
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}
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};
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private final Handler mHandler;
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private final Runnable mRunnable = new Runnable()
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{
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public void run()
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{
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if (mIncrement)
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{
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changeCurrent(mCurrent + 1);
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mHandler
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.postDelayed(
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this,
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mSpeed);
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}
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else if (mDecrement)
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{
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changeCurrent(mCurrent - 1);
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mHandler
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.postDelayed(
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this,
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mSpeed);
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}
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}
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};
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private final EditText mText;
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private final InputFilter mNumberInputFilter;
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private String[] mDisplayedValues;
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protected int mStart;
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protected int mEnd;
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protected int mCurrent;
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protected int mPrevious;
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private OnChangedListener mListener;
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private Formatter mFormatter;
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private long mSpeed = 300;
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private boolean mIncrement;
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private boolean mDecrement;
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public NumberPicker(Context context)
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{
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this(context, null);
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}
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public NumberPicker(Context context, AttributeSet attrs)
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{
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this(context, attrs, 0);
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}
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@SuppressWarnings({"UnusedDeclaration"})
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public NumberPicker(Context context, AttributeSet attrs, int defStyle)
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{
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super(context, attrs);
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setOrientation(VERTICAL);
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LayoutInflater inflater = (LayoutInflater) context
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.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
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inflater.inflate(R.layout.number_picker, this, true);
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mHandler = new Handler();
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InputFilter inputFilter = new NumberPickerInputFilter();
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mNumberInputFilter = new NumberRangeKeyListener();
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mIncrementButton = (NumberPickerButton) findViewById(R.id.increment);
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mIncrementButton.setOnClickListener(this);
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mIncrementButton.setOnLongClickListener(this);
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mIncrementButton.setNumberPicker(this);
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mDecrementButton = (NumberPickerButton) findViewById(R.id.decrement);
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mDecrementButton.setOnClickListener(this);
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mDecrementButton.setOnLongClickListener(this);
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mDecrementButton.setNumberPicker(this);
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mText = (EditText) findViewById(R.id.timepicker_input);
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mText.setOnFocusChangeListener(this);
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mText.setFilters(new InputFilter[]{inputFilter});
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mText.setRawInputType(InputType.TYPE_CLASS_NUMBER);
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if (!isEnabled())
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{
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setEnabled(false);
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}
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mStart = DEFAULT_MIN;
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mEnd = DEFAULT_MAX;
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}
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@Override
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public void setEnabled(boolean enabled)
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{
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super.setEnabled(enabled);
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mIncrementButton.setEnabled(enabled);
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mDecrementButton.setEnabled(enabled);
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mText.setEnabled(enabled);
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}
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public void setOnChangeListener(OnChangedListener listener)
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{
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mListener = listener;
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}
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public void setFormatter(Formatter formatter)
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{
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mFormatter = formatter;
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}
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/**
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* Set the range of numbers allowed for the number picker. The current
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* value will be automatically set to the start.
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*
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* @param start
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* the start of the range (inclusive)
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* @param end
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* the end of the range (inclusive)
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*/
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public void setRange(int start, int end)
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{
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mStart = start;
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mEnd = end;
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mCurrent = start;
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updateView();
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}
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/**
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* Set the range of numbers allowed for the number picker. The current
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* value will be automatically set to the start. Also provide a mapping
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* for values used to display to the user.
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*
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* @param start
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* the start of the range (inclusive)
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* @param end
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* the end of the range (inclusive)
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* @param displayedValues
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* the values displayed to the user.
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*/
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public void setRange(int start, int end, String[] displayedValues)
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{
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mDisplayedValues = displayedValues;
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mStart = start;
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mEnd = end;
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mCurrent = start;
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updateView();
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}
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public void setCurrent(int current)
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{
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mCurrent = current;
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updateView();
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}
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/**
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* The speed (in milliseconds) at which the numbers will scroll
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* when the the +/- buttons are longpressed. Default is 300ms.
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*/
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public void setSpeed(long speed)
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{
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mSpeed = speed;
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}
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public void onClick(View v)
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{
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validateInput(mText);
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if (!mText.hasFocus()) mText.requestFocus();
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// now perform the increment/decrement
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if (R.id.increment == v.getId())
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{
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changeCurrent(mCurrent + 1);
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}
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else if (R.id.decrement == v.getId())
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{
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changeCurrent(mCurrent - 1);
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}
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}
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private String formatNumber(int value)
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{
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return (mFormatter != null) ? mFormatter.toString(value) : String.valueOf(value);
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}
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protected void changeCurrent(int current)
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{
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// Wrap around the values if we go past the start or end
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if (current > mEnd)
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{
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current = mStart;
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}
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else if (current < mStart)
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{
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current = mEnd;
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}
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mPrevious = mCurrent;
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mCurrent = current;
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notifyChange();
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updateView();
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}
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protected void notifyChange()
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{
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if (mListener != null)
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{
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mListener.onChanged(this, mPrevious, mCurrent);
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}
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}
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protected void updateView()
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{
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/*
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* If we don't have displayed values then use the
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* current number else find the correct value in the
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* displayed values for the current number.
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*/
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if (mDisplayedValues == null)
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{
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mText.setText(formatNumber(mCurrent));
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}
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else
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{
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mText.setText(mDisplayedValues[mCurrent - mStart]);
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}
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mText.setSelection(mText.getText().length());
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}
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private void validateCurrentView(CharSequence str)
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{
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int val = getSelectedPos(str.toString());
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if ((val >= mStart) && (val <= mEnd))
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{
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if (mCurrent != val)
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{
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mPrevious = mCurrent;
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mCurrent = val;
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notifyChange();
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}
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}
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updateView();
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}
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public void onFocusChange(View v, boolean hasFocus)
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{
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/*
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* When focus is lost check that the text field
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* has valid values.
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*/
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if (!hasFocus)
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{
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validateInput(v);
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}
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}
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private void validateInput(View v)
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{
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String str = String.valueOf(((TextView) v).getText());
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if ("".equals(str))
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{
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// Restore to the old value as we don't allow empty values
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updateView();
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}
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else
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{
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// Check the new value and ensure it's in range
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validateCurrentView(str);
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}
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}
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/**
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* We start the long click here but rely on the {@link NumberPickerButton} to inform us when the long click has ended.
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*/
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public boolean onLongClick(View v)
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{
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/*
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* The text view may still have focus so clear it's focus which will
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* trigger the on focus changed and any typed values to be pulled.
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*/
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mText.clearFocus();
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if (R.id.increment == v.getId())
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{
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mIncrement = true;
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mHandler.post(mRunnable);
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}
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else if (R.id.decrement == v.getId())
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{
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mDecrement = true;
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mHandler.post(mRunnable);
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}
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return true;
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}
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public void cancelIncrement()
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{
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mIncrement = false;
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}
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public void cancelDecrement()
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{
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mDecrement = false;
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}
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private static final char[] DIGIT_CHARACTERS = new char[]{'0', '1', '2', '3', '4', '5', '6',
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'7', '8', '9' };
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private NumberPickerButton mIncrementButton;
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private NumberPickerButton mDecrementButton;
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private class NumberPickerInputFilter implements InputFilter
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{
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public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart,
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int dend)
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{
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if (mDisplayedValues == null) { return mNumberInputFilter.filter(source, start, end, dest,
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dstart, dend); }
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CharSequence filtered = String.valueOf(source.subSequence(start, end));
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String result = String.valueOf(dest.subSequence(0, dstart)) + filtered
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+ dest.subSequence(dend, dest.length());
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String str = String.valueOf(result).toLowerCase();
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for (String val : mDisplayedValues)
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{
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val = val.toLowerCase();
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if (val.startsWith(str)) { return filtered; }
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}
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return "";
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}
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}
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private class NumberRangeKeyListener extends NumberKeyListener
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{
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// XXX This doesn't allow for range limits when controlled by a
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// soft input method!
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public int getInputType()
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{
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return InputType.TYPE_CLASS_NUMBER;
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}
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@Override
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protected char[] getAcceptedChars()
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{
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return DIGIT_CHARACTERS;
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}
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@Override
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public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart,
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int dend)
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{
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CharSequence filtered = super.filter(source, start, end, dest, dstart, dend);
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if (filtered == null)
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{
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filtered = source.subSequence(start, end);
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}
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String result = String.valueOf(dest.subSequence(0, dstart)) + filtered
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+ dest.subSequence(dend, dest.length());
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if ("".equals(result)) { return result; }
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int val = getSelectedPos(result);
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/*
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* Ensure the user can't type in a value greater
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* than the max allowed. We have to allow less than min
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* as the user might want to delete some numbers
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* and then type a new number.
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*/
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if (val > mEnd)
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{
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return "";
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}
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else
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{
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return filtered;
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}
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}
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}
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private int getSelectedPos(String str)
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{
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if (mDisplayedValues == null)
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{
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return Integer.parseInt(str);
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}
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else
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{
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for (int i = 0; i < mDisplayedValues.length; i++)
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{
|
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/* Don't force the user to type in jan when ja will do */
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str = str.toLowerCase();
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if (mDisplayedValues[i].toLowerCase().startsWith(str)) { return mStart + i; }
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}
|
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/*
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* The user might have typed in a number into the month field i.e.
|
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* 10 instead of OCT so support that too.
|
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*/
|
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try
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{
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return Integer.parseInt(str);
|
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}
|
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catch (NumberFormatException e)
|
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{
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521 |
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/* Ignore as if it's not a number we don't care */
|
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}
|
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}
|
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return mStart;
|
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}
|
527 |
|
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/**
|
529 |
* @return the current value.
|
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*/
|
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public int getCurrent()
|
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{
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return mCurrent;
|
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}
|
535 |
}
|