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package us.minak;
import android.content.Context;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.util.AttributeSet;
import android.support.v4.content.LocalBroadcastManager;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.BroadcastReceiver;
import java.util.*;
public class MinakView extends RelativeLayout {
private final Context mContext;
private OnCharacterEnteredListener mOnCharacterEnteredListener;
private OnBackspacePressedListener mOnBackspacePressedListener;
private Button mShiftButton;
private ShiftState mShiftState = ShiftState.OFF;
private final Queue<Character> mSymbolsQueue = new LinkedList<Character>();
private enum ShiftState {
OFF, ON, CAPS_LOCK
};
public MinakView(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
LocalBroadcastManager.getInstance(mContext).registerReceiver(mBroadcastReceiver,
new IntentFilter(SymbolsActivity.INTENT_ACTION));
}
@Override
protected void onFinishInflate() {
DrawingSpaceView drawingSpaceView = (DrawingSpaceView) findViewById(R.id.drawing_space);
drawingSpaceView.setOnGestureRecognizedListener(new OnGestureRecognizedListener() {
@Override
public void gestureRecognized(String character) {
enterCharacter(character);
}
});
final Button symbolsButton = (Button) findViewById(R.id.symbols_btn);
symbolsButton.setOnClickListener(mButtonClickListener);
symbolsButton.setOnLongClickListener(mButtonLongClickListener);
mShiftButton = (Button) findViewById(R.id.shift_btn);
mShiftButton.setOnClickListener(mButtonClickListener);
mShiftButton.setOnLongClickListener(mButtonLongClickListener);
final Button backspaceButton = (Button) findViewById(R.id.backspace_btn);
backspaceButton.setOnClickListener(mButtonClickListener);
backspaceButton.setOnLongClickListener(mButtonLongClickListener);
final Button spaceButton = (Button) findViewById(R.id.space_btn);
spaceButton.setOnClickListener(mButtonClickListener);
spaceButton.setOnLongClickListener(mButtonLongClickListener);
}
public void setOnCharacterEnteredListener(OnCharacterEnteredListener onCharacterEnteredListener) {
mOnCharacterEnteredListener = onCharacterEnteredListener;
}
public void setOnBackspacePressedListener(OnBackspacePressedListener onBackspacePressedListener) {
mOnBackspacePressedListener = onBackspacePressedListener;
}
public Queue<Character> getSymbolsQueue() {
return mSymbolsQueue;
}
/**
* Receiver for broadcasts coming from the symbols activity.
*/
private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (SymbolsActivity.INTENT_ACTION.equals(intent.getAction())) {
mSymbolsQueue.add(intent.getCharExtra(SymbolsActivity.INTENT_EXTRA_NAME, '?'));
}
}
};
/**
* Listener handling pressing all buttons.
*/
private final OnClickListener mButtonClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.symbols_btn:
final Intent intent = new Intent(mContext, SymbolsActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mContext.startActivity(intent);
break;
case R.id.shift_btn:
shift();
break;
case R.id.backspace_btn:
mOnBackspacePressedListener.backspacePressed(false);
break;
case R.id.space_btn:
mOnCharacterEnteredListener.characterEntered(" ");
break;
default:
throw new IllegalArgumentException();
}
}
};
/**
* Listener handling long pressing all buttons.
*/
private final OnLongClickListener mButtonLongClickListener = new OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
switch (v.getId()) {
case R.id.symbols_btn:
case R.id.shift_btn:
break;
case R.id.backspace_btn:
mOnBackspacePressedListener.backspacePressed(true);
return true;
case R.id.space_btn:
break;
default:
throw new IllegalArgumentException();
}
return false;
}
};
/**
* Changes shift state to the next one (OFF -> ON -> CAPS LOCK).
*/
private void shift() {
switch (mShiftState) {
case OFF:
mShiftState = ShiftState.ON;
mShiftButton.setBackgroundResource(R.drawable.shift_on);
break;
case ON:
mShiftState = ShiftState.CAPS_LOCK;
mShiftButton.setBackgroundResource(R.drawable.shift_caps_lock);
break;
case CAPS_LOCK:
mShiftState = ShiftState.OFF;
mShiftButton.setBackgroundResource(R.drawable.shift_off);
break;
default:
throw new IllegalArgumentException();
}
}
/**
* Passes the given character to the input service.
*
* @param character
* The character to enter
*/
private void enterCharacter(String character) {
switch (mShiftState) {
case OFF:
mOnCharacterEnteredListener.characterEntered(character);
break;
case ON:
mOnCharacterEnteredListener.characterEntered(character.toUpperCase(Locale.ENGLISH));
shift();
break;
case CAPS_LOCK:
mOnCharacterEnteredListener.characterEntered(character.toUpperCase(Locale.ENGLISH));
break;
default:
throw new IllegalArgumentException();
}
}
}
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