des.calculator.ui.MenuTabActivity.java Source code

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Here is the source code for des.calculator.ui.MenuTabActivity.java

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/*******************************************************************************
 * Copyright 2011 Douglas Siemon
 * 
 * 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 des.calculator.ui;

import des.calculator.calculatorPlus.CalculatorState;
import des.calculator.ui.R;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTransaction;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TabHost;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;

import java.util.HashMap;
import android.widget.TabHost.TabSpec;
import android.widget.TableRow.LayoutParams;

/**
 * This demonstrates how you can implement switching between the tabs of a
 * TabHost through fragments.  It uses a trick (see the code below) to allow
 * the tabs to switch between fragments instead of simple views.
 */
public class MenuTabActivity extends FragmentActivity {
    TabHost tabHost;
    private TableLayout historyTable;

    private CalculatorState state = CalculatorState.getInstance();
    //    TabManager mTabManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.menu);
        tabHost = (TabHost) findViewById(R.id.tabhost);
        tabHost.setup();

        TabSpec spec1 = tabHost.newTabSpec("History");
        spec1.setContent(R.id.historyTab);
        spec1.setIndicator("History");

        TabSpec spec2 = tabHost.newTabSpec("Funtions");
        spec2.setIndicator("Funtions");
        spec2.setContent(R.id.functionTab);

        TabSpec spec3 = tabHost.newTabSpec("Variables");
        spec3.setIndicator("Variables");
        spec3.setContent(R.id.variableTab);

        tabHost.addTab(spec1);
        tabHost.addTab(spec2);
        tabHost.addTab(spec3);

        // create the history tab content
        this.historyTable = (TableLayout) this.findViewById(R.id.historyTable);
        Button clearButton = (Button) this.findViewById(R.id.clearHistory);
        clearButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                state.clearHistory();
                buildHistoryTable();
            }
        });
        this.buildHistoryTable();

        if (savedInstanceState != null) {
            tabHost.setCurrentTabByTag(savedInstanceState.getString("tab"));
        }
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putString("tab", tabHost.getCurrentTabTag());
    }

    private void buildHistoryTable() {
        final int historySize = state.getHistoryLength();

        TableRow currentRow = null;
        // clear the table in case it has already been loaded.
        historyTable.removeAllViews();
        // for each history entry
        for (int i = historySize - 1; i >= 0; i--) {
            // create the new row
            currentRow = new TableRow(this);
            //TableLayout.LayoutParams rowLayout = new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);

            //rowLayout.setMargins(2, 2, 2, 2);
            //currentRow.setLayoutParams(rowLayout);
            //currentRow.setBackgroundColor(0xFF282828);
            currentRow.setBackgroundResource(R.layout.rowlayout);
            historyTable.addView(currentRow,
                    new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

            // add the history info
            TextView entry = new TextView(this);
            entry.setText(state.getInputHistory(i));
            entry.setGravity(Gravity.LEFT);
            entry.setTextSize(20);
            entry.setTextColor(0xFFFFFFFF);

            TextView answer = new TextView(this);
            answer.setText(state.getAnsHistory(i));
            answer.setGravity(Gravity.RIGHT);
            answer.setWidth(30);
            answer.setTextSize(20);
            answer.setTextColor(0xFFFFFFFF);

            // create layout params for the text views
            TableRow.LayoutParams textLayout = new TableRow.LayoutParams(LayoutParams.WRAP_CONTENT,
                    LayoutParams.WRAP_CONTENT);
            textLayout.setMargins(4, 1, 4, 1);

            currentRow.addView(entry, textLayout);
            currentRow.addView(answer, textLayout);
        }
    }
}