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/*
* Copyright (c) 2013, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of The Linux Foundation nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.codeaurora.bluetooth.hiddtestapp;
import android.content.Context;
import android.content.res.XmlResourceParser;
import android.util.AttributeSet;
import android.widget.LinearLayout;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.xmlpull.v1.XmlPullParserException;
public class Keyboard extends LinearLayout implements Key.KeyListener {
private static final String XML_TAG_LAYOUT = "Layout";
private static final String XML_TAG_KEY = "Key";
private int mShiftCount = 0;
private KeyboardListener mKeyboardListener;
private final List<Key> mKeysWithShiftLabel = new ArrayList<Key>();
public interface KeyboardListener {
public void onKeyDown(byte keyCode);
public void onKeyUp(byte keyCode);
}
public Keyboard(Context context, int xmlResourceID) {
super(context);
setDefaultLayoutConfiguration();
loadFromXmlResource(context, xmlResourceID);
}
public Keyboard(Context context, AttributeSet attrs, int xmlResourceID) {
super(context, attrs);
setDefaultLayoutConfiguration();
loadFromXmlResource(context, xmlResourceID);
}
public Keyboard(Context context, AttributeSet attrs, int defStyle, int xmlResourceID) {
super(context, attrs, defStyle);
setDefaultLayoutConfiguration();
loadFromXmlResource(context, xmlResourceID);
}
private void setDefaultLayoutConfiguration() {
setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
setOrientation(LinearLayout.VERTICAL);
}
private void loadFromXmlResource(Context context, int xmlResourceID) {
try {
XmlResourceParser xmlParser = context.getResources().getXml(xmlResourceID);
while (xmlParser.getEventType() != XmlResourceParser.END_DOCUMENT) {
if (xmlParser.getEventType() == XmlResourceParser.START_TAG
&& xmlParser.getName().equals(XML_TAG_LAYOUT)) {
addView(parseKeyLayout(context, xmlParser));
}
xmlParser.next();
}
xmlParser.close();
} catch (XmlPullParserException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private LinearLayout parseKeyLayout(Context context, XmlResourceParser xmlParser)
throws XmlPullParserException, IOException {
LinearLayout linearLayout = new LinearLayout(context);
linearLayout.setLayoutParams(new LayoutParams(
xmlParser.getAttributeIntValue(null, "width", LayoutParams.MATCH_PARENT),
xmlParser.getAttributeIntValue(null, "height", 0),
xmlParser.getAttributeFloatValue(null, "weight", 1.0f)));
linearLayout.setOrientation(xmlParser.getAttributeIntValue(null, "orientation",
LinearLayout.HORIZONTAL));
String tag;
do {
xmlParser.next();
tag = xmlParser.getName();
if (xmlParser.getEventType() == XmlResourceParser.START_TAG) {
if (tag.equals(XML_TAG_LAYOUT)) {
linearLayout.addView(parseKeyLayout(context, xmlParser));
} else if (tag.equals(XML_TAG_KEY)) {
Key.KeyAttributes attrs = new Key.KeyAttributes();
attrs.keyFunction = getStringAttributeValue(xmlParser, "keyFunc", "");
attrs.mainLabel = getStringAttributeValue(xmlParser, "keyLabel", "");
attrs.shiftLabel = getStringAttributeValue(xmlParser, "shiftLabel", "");
attrs.keyCode = (byte) xmlParser.getAttributeIntValue(null, "keyCode", 0);
Key key = new Key(context, attrs);
key.setLayoutParams(new LayoutParams(
xmlParser.getAttributeIntValue(null, "width", 0),
xmlParser.getAttributeIntValue(null, "height",
LayoutParams.MATCH_PARENT),
xmlParser.getAttributeFloatValue(null, "weight", 1)));
key.setVisibility(xmlParser.getAttributeBooleanValue(null, "visible", true) ?
VISIBLE : INVISIBLE);
key.setKeyListener(this);
if (attrs != null & attrs.shiftLabel != null & attrs.shiftLabel.length() > 0) {
mKeysWithShiftLabel.add(key);
}
linearLayout.addView(key);
}
}
} while (xmlParser.getEventType() != XmlResourceParser.END_TAG
|| !tag.equals(XML_TAG_LAYOUT));
return linearLayout;
}
private String getStringAttributeValue(XmlResourceParser xmlParser, String attributeName,
String defaultValue) {
String value = xmlParser.getAttributeValue(null, attributeName);
if (value != null)
return value;
return defaultValue;
}
private void updateShiftlabel(boolean shiftOn) {
for (Key key : mKeysWithShiftLabel) {
key.setShiftState(shiftOn);
}
}
private void dispatchOnKeyDown(byte keyCode) {
if (mKeyboardListener != null) {
mKeyboardListener.onKeyDown(keyCode);
}
}
private void dispatchOnKeyUp(byte keyCode) {
if (mKeyboardListener != null) {
mKeyboardListener.onKeyUp(keyCode);
}
}
public void setKeyboardListener(KeyboardListener keyboardListener) {
mKeyboardListener = keyboardListener;
}
@Override
public void onKeyDown(String keyFunction, byte keyCode) {
dispatchOnKeyDown(keyCode);
if (keyFunction.toLowerCase().contains("shift")) {
if (mShiftCount == 0) {
updateShiftlabel(true);
}
mShiftCount++;
}
}
@Override
public void onKeyUp(String keyFunction, byte keyCode) {
dispatchOnKeyUp(keyCode);
if (mShiftCount > 0 && keyFunction.toLowerCase().contains("shift")) {
mShiftCount--;
if (mShiftCount == 0) {
updateShiftlabel(false);
}
}
}
}
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