Android Open Source - FirstTipCalc Ratio Dialog

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From Project

Back to project page FirstTipCalc.

License

The source code is released under:

Apache License

Java Source Code

/**
 * Copyright 2014 ReliQ Artz//from  w  w w. j a  v a  2  s .  co m
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.reliqartz.firsttipcalc.gui;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.reliqartz.firsttipcalc.R;
import com.reliqartz.firsttipcalc.interfaces.SplitRatioChangeListener;
import com.reliqartz.firsttipcalc.utils.ValidTextUtils;

/**
 * Ratio dialog.
 * @author Patrick Reid
 */
public class RatioDialog extends DialogFragment {
  public static final String TAG = "FirstTip/RatioDialog";
  
  private static final String ARG_BILL = "__BILL__";
  private static final String ARG_SPLIT_FOR = "__SPLIT__";
  
  private boolean mAllowClose = false; // close with any ratio
  private int mSplitFor = 2;
  private double mBill = 0.0;
  private SplitRatioChangeListener mActivity;
  private View mView;
  private EditText mRatioEditText;
  
  /**
   * Factory method to create a new instance of this fragment using
   * the provided parameters.
   */
  public static RatioDialog newInstance(double bill, int splitFor) {
    RatioDialog fragment = new RatioDialog();
    Bundle args = new Bundle();
    args.putDouble(ARG_BILL, bill);
    args.putInt(ARG_SPLIT_FOR, splitFor);
    fragment.setArguments(args);
    return fragment;
  }
  
  /* (non-Javadoc)
   * @see android.support.v4.app.DialogFragment#onCreate(android.os.Bundle)
   */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mSplitFor = getArguments().getInt(ARG_SPLIT_FOR, mSplitFor);
    mBill = getArguments().getDouble(ARG_BILL, mBill);
    Log.i(TAG, "Expecting ratio of " + mBill + " split for " + mSplitFor);
  }

  /* (non-Javadoc)
   * @see android.support.v4.app.DialogFragment#onAttach(android.app.Activity)
   */
  @Override
  public void onAttach(Activity activity) {
    super.onAttach(activity);
    try {
      mActivity = (SplitRatioChangeListener) activity;
    } catch(ClassCastException e) {
      Log.e(TAG, "Calling activity must implement SplitRatioChangeListener!!");
      e.printStackTrace();
    }
  }

  /* (non-Javadoc)
   * @see android.support.v4.app.DialogFragment#onCreateDialog(android.os.Bundle)
   */
  @Override
  public Dialog onCreateDialog(Bundle savedInstanceState) {
    mView = getActivity().getLayoutInflater().inflate(R.layout.fragment_ratio_dialog, null);
    mRatioEditText = (EditText) mView.findViewById(R.id.ratioEditText);
    
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); 
    builder.setTitle(R.string.title_ratio_dialog);
    builder.setView(mView);
    ((TextView) mView.findViewById(R.id.ratioHintTextView))
      .setText(getString(R.string.ratio_hint_text, mSplitFor));
    builder.setNegativeButton(R.string.cancel_text, new DialogInterface.OnClickListener() {
      @Override
      public void onClick(DialogInterface dialog, int which) {
        Log.v(TAG, "Ratio cancelled.");
      }
    });
    builder.setPositiveButton(R.string.title_section2, null);
    return builder.create();
  }

  /* (non-Javadoc)
   * @see android.support.v4.app.DialogFragment#onStart()
   */
  @Override
  public void onStart() {
    super.onStart();
    
    // prevent canceling
    setCancelable(false);
    
    // setup TextWatcher for input
    mRatioEditText.addTextChangedListener(new TextWatcher(){

      @Override
      public void beforeTextChanged(CharSequence s, int start, int count,
          int after) {
        // do nothing
      }

      @Override
      public void onTextChanged(CharSequence s, int start, int before,
          int count) {
        // do nothing
      }
      @Override
      public void afterTextChanged(Editable s) {
        String str = s.toString();
        // allow only 0-9 and :
        if (str.length() > 0) {
          int length = str.length();
          // if last character is not allowed
          if ( ! str.substring(length-1, length).matches("[:0-9]")) {
                str = str.substring(0, length-1);
                s.clear();     // clear editable 
                s.append(str);   // append acceptable string
            }
        }
      }
      
    });
    
    // get the shown dialog and override the positive buttons OnClickListener
    AlertDialog dialog = (AlertDialog) getDialog();
    if (dialog != null) {
      dialog.getButton(Dialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
          String ratio = mRatioEditText.getText().toString();
          if (ValidTextUtils.validRatio(ratio, mSplitFor) || mAllowClose) {
            mActivity.onSplitRatioChanged(ratio);
            dismiss();
          } else {
            Toast.makeText(getActivity(), 
                getString(R.string.ratio_invalid, mSplitFor), Toast.LENGTH_SHORT).show();
          }
        }
      });
    }  
  }
  
}

Java Source Code List

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