Android Open Source - interdroid-swan Merge Expression Dialog

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License

The source code is released under:

Copyright (c) 2008-2011 Vrije Universiteit, The Netherlands All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the follo...

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Java Source Code

package interdroid.swan.ui;
//from w w  w . j  a v  a 2  s .co m
import interdroid.swan.R;
import interdroid.swan.swansong.BinaryLogicOperator;
import interdroid.swan.swansong.Expression;
import interdroid.swan.swansong.ExpressionFactory;
import interdroid.swan.swansong.ExpressionParseException;
import interdroid.swan.swansong.LogicExpression;
import interdroid.swan.swansong.TriStateExpression;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.RadioGroup;
import android.widget.Toast;

public class MergeExpressionDialog extends Activity {

  public static final int LEFT = 1;
  public static final int RIGHT = 2;
  public static final int OPERATOR = 3;

  boolean leftActive = false;
  boolean rightActive = false;

  int leftIndex;
  int rightIndex;

  ArrayList<String> expressions;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setResult(RESULT_CANCELED);

    setContentView(R.layout.expression_builder_merge_dialog);

    expressions = getIntent().getStringArrayListExtra("Expressions");

    findViewById(R.id.left).setOnClickListener(new View.OnClickListener() {

      @Override
      public void onClick(View v) {
        startActivityForResult(
            getIntent().setClass(getApplicationContext(),
                SelectExpressionDialog.class), LEFT);
      }
    });

    findViewById(R.id.right).setOnClickListener(new View.OnClickListener() {

      @Override
      public void onClick(View v) {
        startActivityForResult(
            getIntent().setClass(getApplicationContext(),
                SelectExpressionDialog.class), RIGHT);
      }
    });

    findViewById(R.id.ok).setOnClickListener(new View.OnClickListener() {

      @Override
      public void onClick(View v) {
        try {
          Expression left = ExpressionFactory
              .parse(((Button) findViewById(R.id.left)).getText()
                  .toString());
          Expression right = ExpressionFactory
              .parse(((Button) findViewById(R.id.right))
                  .getText().toString());
          BinaryLogicOperator logicOperator = ((RadioGroup) findViewById(R.id.operator))
              .getCheckedRadioButtonId() == R.id.and ? BinaryLogicOperator.AND
              : BinaryLogicOperator.OR;
          Expression newExpression = new LogicExpression(
              Expression.LOCATION_INFER,
              (TriStateExpression) left, logicOperator,
              (TriStateExpression) right);
          expressions.add(newExpression.toParseString());
          if (!((CheckBox) findViewById(R.id.keep_originals))
              .isChecked()) {
            expressions.remove(Math.max(rightIndex, leftIndex));
            expressions.remove(Math.min(rightIndex, leftIndex));
          }
          Intent result = new Intent();
          result.putStringArrayListExtra("Expressions", expressions);
          setResult(RESULT_OK, result);
          finish();
        } catch (ExpressionParseException e) {
          // TODO: improve this
          Toast.makeText(getApplicationContext(), "Failed!",
              Toast.LENGTH_LONG).show();
        }

      }
    });

  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
      switch (requestCode) {
      case LEFT:
        leftIndex = data.getIntExtra("Position", -1);
        ((Button) findViewById(R.id.left)).setText(expressions
            .get(leftIndex));
        leftActive = true;
        break;
      case RIGHT:
        rightIndex = data.getIntExtra("Position", -1);
        ((Button) findViewById(R.id.right)).setText(expressions
            .get(rightIndex));
        rightActive = true;
        break;
      default:
        break;
      }
      findViewById(R.id.ok).setEnabled(leftActive && rightActive);
    }
  }

}

Java Source Code List