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/**
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*
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* Enhanced by Zoff (c) 2011 - 2012
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* zoff@zanavi.cc
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*
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*/
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/**
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* Copyright (c) 2010, Jeffrey F. Cole
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the technologichron.net nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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package net.technologichron.manacalc;
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import android.content.Context;
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import android.os.Handler;
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import android.text.Editable;
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import android.text.InputType;
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import android.text.TextWatcher;
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import android.util.AttributeSet;
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import android.view.Gravity;
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import android.view.KeyEvent;
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import android.view.MotionEvent;
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import android.view.View;
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import android.widget.Button;
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import android.widget.EditText;
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import android.widget.LinearLayout;
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/**
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* A simple layout group that provides a numeric text area with two buttons to
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* increment or decrement the value in the text area. Holding either button
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* will auto increment the value up or down appropriately.
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*
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* @author Jeffrey F. Cole
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*
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*/
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public class NumberPicker extends LinearLayout
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{
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private final long REPEAT_DELAY = 50;
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private final int ELEMENT_HEIGHT = 120;
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private final int ELEMENT_WIDTH = 70;
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private final int MINIMUM = 0;
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private final int MAXIMUM = 9;
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private int mMaxValue = MAXIMUM;
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private int mMinValue = MINIMUM;
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public Integer value;
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Button decrement;
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Button increment;
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public EditText valueText;
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private Handler repeatUpdateHandler = new Handler();
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private boolean autoIncrement = false;
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private boolean autoDecrement = false;
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/**
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* This little guy handles the auto part of the auto incrementing feature.
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* In doing so it instantiates itself. There has to be a pattern name for
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* that...
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*
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* @author Jeffrey F. Cole
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*
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*/
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class RepetetiveUpdater implements Runnable
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{
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public void run()
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{
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if (autoIncrement)
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{
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increment();
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repeatUpdateHandler.postDelayed(new RepetetiveUpdater(), REPEAT_DELAY);
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}
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else if (autoDecrement)
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{
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decrement();
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repeatUpdateHandler.postDelayed(new RepetetiveUpdater(), REPEAT_DELAY);
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}
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}
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}
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public NumberPicker(Context context, AttributeSet attributeSet)
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{
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super(context, attributeSet);
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int nW = attributeSet.getAttributeIntValue(null, "nwidth", android.view.ViewGroup.LayoutParams.WRAP_CONTENT);
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int nH = attributeSet.getAttributeIntValue(null, "nheight", android.view.ViewGroup.LayoutParams.WRAP_CONTENT);
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mMinValue = attributeSet.getAttributeIntValue(null, "minValue", mMinValue);
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mMaxValue = attributeSet.getAttributeIntValue(null, "maxValue", mMaxValue);
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this.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
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LayoutParams elementParams = new LinearLayout.LayoutParams(nW, nH);
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// init the individual elements
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initDecrementButton(context);
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initValueEditText(context);
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initIncrementButton(context);
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// Can be configured to be vertical or horizontal
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// Thanks for the help, LinearLayout!
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if (getOrientation() == VERTICAL)
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{
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addView(increment, elementParams);
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addView(valueText, elementParams);
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addView(decrement, elementParams);
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}
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else
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{
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addView(decrement, elementParams);
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addView(valueText, elementParams);
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addView(increment, elementParams);
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}
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}
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private void initIncrementButton(Context context)
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{
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increment = new Button(context);
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increment.setTextSize(20);
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increment.setText("+");
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// Increment once for a click
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increment.setOnClickListener(new View.OnClickListener()
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{
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public void onClick(View v)
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{
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increment();
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}
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});
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// Auto increment for a long click
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increment.setOnLongClickListener(new View.OnLongClickListener()
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{
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public boolean onLongClick(View arg0)
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{
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autoIncrement = true;
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repeatUpdateHandler.post(new RepetetiveUpdater());
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return false;
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}
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});
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// When the button is released, if we're auto incrementing, stop
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increment.setOnTouchListener(new View.OnTouchListener()
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{
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public boolean onTouch(View v, MotionEvent event)
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{
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if (event.getAction() == MotionEvent.ACTION_UP && autoIncrement)
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{
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autoIncrement = false;
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}
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return false;
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}
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});
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}
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private void initValueEditText(Context context)
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{
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value = new Integer(0);
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valueText = new EditText(context);
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valueText.setTextSize(20);
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// Since we're a number that gets affected by the button, we need to be
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// ready to change the numeric value with a simple ++/--, so whenever
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// the value is changed with a keyboard, convert that text value to a
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// number. We can set the text area to only allow numeric input, but
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// even so, a carriage return can get hacked through. To prevent this
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// little quirk from causing a crash, store the value of the internal
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// number before attempting to parse the changed value in the text area
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// so we can revert to that in case the text change causes an invalid
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// number
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valueText.setOnKeyListener(new View.OnKeyListener()
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{
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public boolean onKey(View v, int arg1, KeyEvent event)
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{
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//System.out.println("xx222222222222");
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int backupValue = value;
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try
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{
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value = Integer.parseInt(((EditText) v).getText().toString());
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}
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catch (NumberFormatException nfe)
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{
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value = backupValue;
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}
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return false;
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}
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});
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valueText.addTextChangedListener(new TextWatcher()
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{
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@Override
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public void afterTextChanged(Editable s)
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{
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//System.out.println("xxxxxxxx111");
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int backupValue = value;
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try
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{
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value = Integer.parseInt(valueText.getText().toString());
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}
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catch (NumberFormatException nfe)
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{
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value = backupValue;
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}
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}
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@Override
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public void beforeTextChanged(CharSequence s, int start, int count, int after)
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{
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}
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@Override
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public void onTextChanged(CharSequence s, int start, int before, int count)
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{
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}
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});
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// Highlight the number when we get focus
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valueText.setOnFocusChangeListener(new View.OnFocusChangeListener()
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{
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public void onFocusChange(View v, boolean hasFocus)
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{
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if (hasFocus)
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{
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((EditText) v).selectAll();
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}
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}
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});
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valueText.setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL);
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valueText.setText(value.toString());
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valueText.setInputType(InputType.TYPE_CLASS_NUMBER);
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}
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private void initDecrementButton(Context context)
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{
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decrement = new Button(context);
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decrement.setTextSize(20);
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decrement.setText("-");
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// Decrement once for a click
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decrement.setOnClickListener(new View.OnClickListener()
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{
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public void onClick(View v)
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{
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decrement();
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}
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});
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// Auto Decrement for a long click
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decrement.setOnLongClickListener(new View.OnLongClickListener()
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{
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public boolean onLongClick(View arg0)
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{
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autoDecrement = true;
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repeatUpdateHandler.post(new RepetetiveUpdater());
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return false;
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}
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});
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// When the button is released, if we're auto decrementing, stop
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decrement.setOnTouchListener(new View.OnTouchListener()
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{
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public boolean onTouch(View v, MotionEvent event)
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{
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if (event.getAction() == MotionEvent.ACTION_UP && autoDecrement)
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{
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autoDecrement = false;
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}
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return false;
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}
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});
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}
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public void increment()
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{
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if (value < mMaxValue)
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{
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value = value + 1;
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valueText.setText(value.toString());
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}
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}
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public void decrement()
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{
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if (value > mMinValue)
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{
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value = value - 1;
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valueText.setText(value.toString());
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}
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}
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public int getValue()
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{
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return value;
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}
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public void setValue(int value)
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{
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if (value > mMaxValue) value = mMaxValue;
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if (value >= 0)
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{
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this.value = value;
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valueText.setText(this.value.toString());
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}
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}
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}
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