com.reliqartz.firsttipcalc.gui.RatioDialog.java Source code

Introduction

Here is the source code for com.reliqartz.firsttipcalc.gui.RatioDialog.java

Source

/**
 * Copyright 2014 ReliQ Artz
 *
 * 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();
                    }
                }
            });
        }
    }

}