Merge branch 'dev-matrix-support' into dev

Conflicts:
	calculatorpp/AndroidManifest.xml
	calculatorpp/project.properties
	calculatorpp/res/layout/calc_vars_button.xml
	calculatorpp/src/main/java/org/solovyev/android/calculator/CalculatorButtons.java

calculatorpp/AndroidManifest.xml

@@ -53,6 +53,9 @@
 
         <activity android:label="@string/c_plot_graph" android:name=".plot.CalculatorPlotActivity"/>
 
+        <!-- todo serso: strings-->
+        <activity android:label="@string/c_plot_graph" android:name=".matrix.CalculatorMatrixActivity"/>
+
         <activity android:name=".widget.CalculatorWidgetConfigurationActivity" android:theme="@style/cpp_metro_blue_theme">
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE"/>

calculatorpp/res/layout/calc_vars_button.xml

@@ -11,6 +11,7 @@
 													   a:id="@+id/vars_button"
 													   c:directionTextScale="0.5"
 													   c:textUp="+π"
+													   c:textDown="+m"
 													   a:text="π,…"
 													   a:textStyle="italic"
 													   a:onClick="varsButtonClickHandler"

calculatorpp/res/layout/matrix_edit_fragment.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+
+<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
+              xmlns:picker="http://schemas.android.com/apk/res-auto"
+              a:id="@+id/main_fragment_layout"
+              style="?fragmentLayoutStyle"
+              a:layout_width="match_parent"
+              a:layout_height="match_parent">
+
+    <TextView a:id="@+id/fragmentTitle"
+              a:layout_height="wrap_content"
+              a:layout_width="match_parent"
+              style="?fragmentTitleStyle"/>
+
+    <include layout="@layout/ad"/>
+
+    <LinearLayout a:layout_height="match_parent"
+                  a:layout_width="match_parent"
+                  a:orientation="vertical">
+
+        <org.solovyev.android.view.Picker a:id="@+id/matrix_cols_count_picker"
+                                          a:layout_height="wrap_content"
+                                          a:layout_width="wrap_content"
+                                          a:layout_gravity="center"
+                                          picker:orientation="horizontal"/>
+
+        <LinearLayout a:layout_height="match_parent"
+                      a:layout_width="match_parent"
+                      a:orientation="horizontal"
+                      a:gravity="center">
+
+            <org.solovyev.android.view.Picker a:id="@+id/matrix_rows_count_picker"
+                                              a:layout_height="wrap_content"
+                                              a:layout_width="wrap_content"/>
+
+            <ScrollView a:layout_height="match_parent"
+                        a:layout_width="match_parent"
+                        a:scrollbars="vertical">
+
+                <HorizontalScrollView a:layout_height="wrap_content"
+                                      a:layout_width="match_parent"
+                                      a:minHeight="300dp">
+
+                    <org.solovyev.android.calculator.matrix.MatrixView a:id="@+id/matrix_layout"
+                                                                       a:layout_height="match_parent"
+                                                                       a:layout_width="match_parent"
+                                                                       a:minWidth="300dp"/>
+
+                </HorizontalScrollView>
+
+            </ScrollView>
+
+        </LinearLayout>
+
+    </LinearLayout>
+
+
+</LinearLayout>

calculatorpp/res/layout/matrix_edit_fragment_item.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
+              a:layout_height="match_parent"
+              a:layout_width="match_parent">
+
+    <EditText a:id="@+id/matrix_element_edittext"
+              a:layout_height="match_parent"
+              a:layout_width="match_parent"
+              a:text="test"/>
+
+</LinearLayout>

calculatorpp/src/main/java/org/solovyev/android/calculator/CalculatorButtons.java

@@ -2,6 +2,7 @@ package org.solovyev.android.calculator;
 
 import android.app.Activity;
 import android.content.Context;
+import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.res.Configuration;
 import android.preference.PreferenceManager;
@@ -16,6 +17,7 @@ import jscl.NumeralBase;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.AndroidUtils;
+import org.solovyev.android.calculator.matrix.CalculatorMatrixActivity;
 import org.solovyev.android.calculator.model.AndroidCalculatorEngine;
 import org.solovyev.android.calculator.view.AngleUnitsButton;
 import org.solovyev.android.calculator.view.NumeralBasesButton;
@@ -134,6 +136,9 @@ public final class CalculatorButtons {
             if (dragDirection == DragDirection.up) {
                 CalculatorActivityLauncher.createVar(context, Locator.getInstance().getDisplay());
                 result = true;
+            } else if ( dragDirection == DragDirection.down ) {
+                context.startActivity(new Intent(context, CalculatorMatrixActivity.class));
+                result = true;
             }
 
             return result;

calculatorpp/src/main/java/org/solovyev/android/calculator/about/CalculatorFragmentType.java

@@ -1,76 +1,80 @@
-package org.solovyev.android.calculator.about;
+package org.solovyev.android.calculator.about;
-
+
-import android.support.v4.app.Fragment;
+import android.support.v4.app.Fragment;
-import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.NotNull;
-import org.solovyev.android.calculator.CalculatorEditorFragment;
+import org.solovyev.android.calculator.CalculatorEditorFragment;
-import org.solovyev.android.calculator.R;
+import org.solovyev.android.calculator.R;
-import org.solovyev.android.calculator.help.CalculatorHelpFaqFragment;
+import org.solovyev.android.calculator.help.CalculatorHelpFaqFragment;
-import org.solovyev.android.calculator.help.CalculatorHelpHintsFragment;
+import org.solovyev.android.calculator.help.CalculatorHelpHintsFragment;
-import org.solovyev.android.calculator.help.CalculatorHelpScreensFragment;
+import org.solovyev.android.calculator.help.CalculatorHelpScreensFragment;
-import org.solovyev.android.calculator.history.CalculatorHistoryFragment;
+import org.solovyev.android.calculator.history.CalculatorHistoryFragment;
-import org.solovyev.android.calculator.history.CalculatorSavedHistoryFragment;
+import org.solovyev.android.calculator.history.CalculatorSavedHistoryFragment;
-import org.solovyev.android.calculator.math.edit.CalculatorFunctionsFragment;
+import org.solovyev.android.calculator.math.edit.CalculatorFunctionsFragment;
-import org.solovyev.android.calculator.math.edit.CalculatorOperatorsFragment;
+import org.solovyev.android.calculator.math.edit.CalculatorOperatorsFragment;
-import org.solovyev.android.calculator.math.edit.CalculatorVarsFragment;
+import org.solovyev.android.calculator.math.edit.CalculatorVarsFragment;
-import org.solovyev.android.calculator.plot.CalculatorPlotFragment;
+import org.solovyev.android.calculator.matrix.CalculatorMatrixEditFragment;
-
+import org.solovyev.android.calculator.plot.CalculatorPlotFragment;
-/**
+
- * User: Solovyev_S
+/**
- * Date: 03.10.12
+ * User: Solovyev_S
- * Time: 11:30
+ * Date: 03.10.12
- */
+ * Time: 11:30
-public enum CalculatorFragmentType {
+ */
-
+public enum CalculatorFragmentType {
-    editor(CalculatorEditorFragment.class, R.layout.calc_editor, R.string.editor),
+
-    //display(CalculatorHistoryFragment.class, "history", R.layout.history_fragment, R.string.c_history),
+    editor(CalculatorEditorFragment.class, R.layout.calc_editor, R.string.editor),
-    //keyboard(CalculatorHistoryFragment.class, "history", R.layout.history_fragment, R.string.c_history),
+    //display(CalculatorHistoryFragment.class, "history", R.layout.history_fragment, R.string.c_history),
-    history(CalculatorHistoryFragment.class, R.layout.history_fragment, R.string.c_history),
+    //keyboard(CalculatorHistoryFragment.class, "history", R.layout.history_fragment, R.string.c_history),
-    saved_history(CalculatorSavedHistoryFragment.class, R.layout.history_fragment, R.string.c_saved_history),
+    history(CalculatorHistoryFragment.class, R.layout.history_fragment, R.string.c_history),
-    variables(CalculatorVarsFragment.class, R.layout.vars_fragment, R.string.c_vars),
+    saved_history(CalculatorSavedHistoryFragment.class, R.layout.history_fragment, R.string.c_saved_history),
-    functions(CalculatorFunctionsFragment.class, R.layout.math_entities_fragment, R.string.c_functions),
+    variables(CalculatorVarsFragment.class, R.layout.vars_fragment, R.string.c_vars),
-    operators(CalculatorOperatorsFragment.class, R.layout.math_entities_fragment, R.string.c_operators),
+    functions(CalculatorFunctionsFragment.class, R.layout.math_entities_fragment, R.string.c_functions),
-    plotter(CalculatorPlotFragment.class, R.layout.plot_fragment, R.string.c_graph),
+    operators(CalculatorOperatorsFragment.class, R.layout.math_entities_fragment, R.string.c_operators),
-    about(CalculatorAboutFragment.class, R.layout.about_fragment, R.string.c_about),
+    plotter(CalculatorPlotFragment.class, R.layout.plot_fragment, R.string.c_graph),
-    faq(CalculatorHelpFaqFragment.class, R.layout.help_faq_fragment, R.string.c_faq),
+    about(CalculatorAboutFragment.class, R.layout.about_fragment, R.string.c_about),
-    hints(CalculatorHelpHintsFragment.class, R.layout.help_hints_fragment, R.string.c_hints),
+    faq(CalculatorHelpFaqFragment.class, R.layout.help_faq_fragment, R.string.c_faq),
-    screens(CalculatorHelpScreensFragment.class, R.layout.help_screens_fragment, R.string.c_screens),
+    hints(CalculatorHelpHintsFragment.class, R.layout.help_hints_fragment, R.string.c_hints),
-    release_notes(CalculatorReleaseNotesFragment.class, R.layout.release_notes_fragment, R.string.c_release_notes);
+    screens(CalculatorHelpScreensFragment.class, R.layout.help_screens_fragment, R.string.c_screens),
-
+
-    @NotNull
+    // todo serso: strings
-    private Class<? extends Fragment> fragmentClass;
+    matrix_edit(CalculatorMatrixEditFragment.class, R.layout.matrix_edit_fragment, R.string.c_screens),
-
+    release_notes(CalculatorReleaseNotesFragment.class, R.layout.release_notes_fragment, R.string.c_release_notes);
-    private final int defaultLayoutId;
+
-
+    @NotNull
-    private int defaultTitleResId;
+    private Class<? extends Fragment> fragmentClass;
-
+
-    private CalculatorFragmentType(@NotNull Class<? extends Fragment> fragmentClass,
+    private final int defaultLayoutId;
-                                   int defaultLayoutId,
+
-                                   int defaultTitleResId) {
+    private int defaultTitleResId;
-        this.fragmentClass = fragmentClass;
+
-        this.defaultLayoutId = defaultLayoutId;
+    private CalculatorFragmentType(@NotNull Class<? extends Fragment> fragmentClass,
-        this.defaultTitleResId = defaultTitleResId;
+                                   int defaultLayoutId,
-    }
+                                   int defaultTitleResId) {
-
+        this.fragmentClass = fragmentClass;
-    @NotNull
+        this.defaultLayoutId = defaultLayoutId;
-    public String getFragmentTag() {
+        this.defaultTitleResId = defaultTitleResId;
-        return this.name();
+    }
-    }
+
-
+    @NotNull
-    public int getDefaultTitleResId() {
+    public String getFragmentTag() {
-        return defaultTitleResId;
+        return this.name();
-    }
+    }
-
+
-    @NotNull
+    public int getDefaultTitleResId() {
-    public Class<? extends Fragment> getFragmentClass() {
+        return defaultTitleResId;
-        return fragmentClass;
+    }
-    }
+
-
+    @NotNull
-    public int getDefaultLayoutId() {
+    public Class<? extends Fragment> getFragmentClass() {
-        return defaultLayoutId;
+        return fragmentClass;
-    }
+    }
-
+
-    @NotNull
+    public int getDefaultLayoutId() {
-    public String createSubFragmentTag(@NotNull String subFragmentTag) {
+        return defaultLayoutId;
-        return this.getFragmentTag() + "_" + subFragmentTag;
+    }
-    }
+
-}
+    @NotNull
+    public String createSubFragmentTag(@NotNull String subFragmentTag) {
+        return this.getFragmentTag() + "_" + subFragmentTag;
+    }
+}

calculatorpp/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixActivity.java

@@ -0,0 +1,23 @@
+package org.solovyev.android.calculator.matrix;
+
+import android.app.ActionBar;
+import android.os.Bundle;
+import org.solovyev.android.calculator.CalculatorFragmentActivity;
+import org.solovyev.android.calculator.R;
+import org.solovyev.android.calculator.about.CalculatorFragmentType;
+
+/**
+ * User: Solovyev_S
+ * Date: 12.10.12
+ * Time: 10:56
+ */
+public class CalculatorMatrixActivity extends CalculatorFragmentActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
+        getActivityHelper().setFragment(this, CalculatorFragmentType.matrix_edit, null, R.id.main_layout);
+    }
+}

calculatorpp/src/main/java/org/solovyev/android/calculator/matrix/CalculatorMatrixEditFragment.java

@@ -0,0 +1,137 @@
+package org.solovyev.android.calculator.matrix;
+
+import android.os.Bundle;
+import android.view.View;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.solovyev.android.calculator.CalculatorFragment;
+import org.solovyev.android.calculator.R;
+import org.solovyev.android.calculator.about.CalculatorFragmentType;
+import org.solovyev.android.view.IntegerRange;
+import org.solovyev.android.view.Picker;
+
+import java.io.Serializable;
+
+/**
+ * User: Solovyev_S
+ * Date: 12.10.12
+ * Time: 10:41
+ */
+public class CalculatorMatrixEditFragment extends CalculatorFragment implements Picker.OnChangedListener<Integer> {
+
+    /*
+    **********************************************************************
+    *
+    *                           CONSTANTS
+    *
+    **********************************************************************
+    */
+
+    private static final int MAX_COUNT = 10;
+    private static final int MIN_COUNT = 2;
+    private static final int DEFAULT_ROWS = 2;
+    private static final int DEFAULT_COLS = 2;
+
+    private static final String MATRIX = "matrix";
+
+
+    /*
+    **********************************************************************
+    *
+    *                           CONSTRUCTORS
+    *
+    **********************************************************************
+    */
+
+    public CalculatorMatrixEditFragment() {
+        super(CalculatorFragmentType.matrix_edit);
+
+        setRetainInstance(true);
+    }
+
+    /*
+    **********************************************************************
+    *
+    *                           METHODS
+    *
+    **********************************************************************
+    */
+
+
+    @Override
+    public void onViewCreated(View root, @Nullable Bundle in) {
+        super.onViewCreated(root, in);
+
+        final Picker<Integer> matrixRowsCountPicker = (Picker<Integer>) root.findViewById(R.id.matrix_rows_count_picker);
+        initPicker(matrixRowsCountPicker);
+        final Picker<Integer> matrixColsCountPicker = (Picker<Integer>) root.findViewById(R.id.matrix_cols_count_picker);
+        initPicker(matrixColsCountPicker);
+
+        Matrix matrix = null;
+        if (in != null) {
+            final Object matrixObject = in.getSerializable(MATRIX);
+            if (matrixObject instanceof Matrix) {
+                matrix = (Matrix) matrixObject;
+            }
+        }
+
+        final MatrixView matrixView = getMatrixView(root);
+        if (matrix == null) {
+            matrixView.setMatrixDimensions(DEFAULT_ROWS, DEFAULT_COLS);
+        } else {
+            matrixView.setMatrix(matrix.bakingArray);
+        }
+        matrixRowsCountPicker.setCurrent(matrixView.getRows());
+        matrixColsCountPicker.setCurrent(matrixView.getCols());
+    }
+
+    @Override
+    public void onSaveInstanceState(@NotNull Bundle out) {
+        super.onSaveInstanceState(out);
+
+        out.putSerializable(MATRIX, new Matrix(getMatrixView(getView()).toMatrix()));
+    }
+
+    @NotNull
+    private MatrixView getMatrixView(@NotNull View root) {
+        return (MatrixView) root.findViewById(R.id.matrix_layout);
+    }
+
+    private void initPicker(@NotNull Picker<Integer> picker) {
+        picker.setRange(new IntegerRange(MIN_COUNT, MAX_COUNT, 1, 0, null));
+        picker.setOnChangeListener(this);
+    }
+
+    @Override
+    public void onChanged(@NotNull Picker picker, @NotNull Integer value) {
+        switch (picker.getId()) {
+            case R.id.matrix_rows_count_picker:
+                onRowsCountChange(value);
+                break;
+            case R.id.matrix_cols_count_picker:
+                onColsCountChange(value);
+                break;
+        }
+    }
+
+    private void onColsCountChange(@NotNull Integer newCols) {
+        getMatrixView(getView()).setMatrixCols(newCols);
+    }
+
+    private void onRowsCountChange(@NotNull Integer newRows) {
+        getMatrixView(getView()).setMatrixRows(newRows);
+    }
+
+    public static class Matrix implements Serializable {
+
+        @NotNull
+        private String[][] bakingArray;
+
+        public Matrix() {
+        }
+
+        public Matrix(@NotNull String[][] bakingArray) {
+            this.bakingArray = bakingArray;
+        }
+    }
+}

calculatorpp/src/main/java/org/solovyev/android/calculator/matrix/MatrixView.java

@@ -0,0 +1,289 @@
+package org.solovyev.android.calculator.matrix;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.EditText;
+import android.widget.TableLayout;
+import android.widget.TableRow;
+import android.widget.TextView;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * User: Solovyev_S
+ * Date: 12.10.12
+ * Time: 15:41
+ */
+public class MatrixView extends TableLayout {
+
+    /*
+    **********************************************************************
+    *
+    *                           CONSTANTS
+    *
+    **********************************************************************
+    */
+
+    private static final CharSequence DEFAULT_CELL_TEXT = "0";
+    private static final int NUMBER_INDEX = -1;
+
+
+    /*
+    **********************************************************************
+    *
+    *                           FIELDS
+    *
+    **********************************************************************
+    */
+
+    private int rows = 0;
+    private int cols = 0;
+
+    @Nullable
+    private CharSequence defaultCellText = DEFAULT_CELL_TEXT;
+
+    private boolean initialized = false;
+
+    /*
+    **********************************************************************
+    *
+    *                           CONSTRUCTORS
+    *
+    **********************************************************************
+    */
+
+    public MatrixView(Context context) {
+        super(context);
+    }
+
+    public MatrixView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    /*
+    **********************************************************************
+    *
+    *                           METHODS
+    *
+    **********************************************************************
+    */
+
+    public int getRows() {
+        return rows;
+    }
+
+    public int getCols() {
+        return cols;
+    }
+
+    public void setMatrixCols(int newCols) {
+        setMatrixDimensions(rows, newCols);
+    }
+
+    public void setMatrixRows(int newRows) {
+        setMatrixDimensions(newRows, cols);
+    }
+
+    public void setMatrixDimensions(int newRows, int newCols) {
+        if (newRows <= 1) {
+            throw new IllegalArgumentException("Number of rows must be more than 1: " + newRows);
+        }
+
+        if (newCols <= 1) {
+            throw new IllegalArgumentException("Number of columns must be more than 1: " + newCols);
+        }
+
+        boolean rowsChanged = this.rows != newRows;
+        boolean colsChanged = this.cols != newCols;
+
+        if (rowsChanged || colsChanged) {
+            if (!initialized) {
+                addRow(NUMBER_INDEX, 0);
+                initialized = true;
+            }
+
+            if (this.cols > newCols) {
+                removeCols(newCols);
+            } else if (this.cols < newCols) {
+                addCols(newCols);
+            }
+
+            this.cols = newCols;
+
+            if (this.rows > newRows) {
+                removeRows(newRows);
+            } else if (this.rows < newRows) {
+                addRows(newRows);
+            }
+
+            this.rows = newRows;
+        }
+    }
+
+    public void setMatrix(@NotNull Object[][] matrix) {
+        final int rows = matrix.length;
+        final int cols = matrix[0].length;
+
+        setMatrixDimensions(rows, cols);
+        for (int row = 0; row < rows; row++) {
+            for (int col = 0; col < cols; col++) {
+                setCell(row, col, matrix[row][col]);
+            }
+        }
+    }
+
+    @NotNull
+    public String[][] toMatrix() {
+        final String[][] result = new String[rows][cols];
+
+        for (int row = 0; row < rows; row++) {
+            for (int col = 0; col < cols; col++) {
+                final TextView cellTextView = (TextView) getCell(this, row, col);
+                if (cellTextView != null) {
+                    result[row][col] = cellTextView.getText().toString();
+                }
+            }
+        }
+
+        return result;
+    }
+
+    private void setCell(int row, int col, @Nullable Object o) {
+        final TextView cellTextView = (TextView) getCell(this, row, col);
+        if (cellTextView != null) {
+            if (o == null) {
+                cellTextView.setText(null);
+            } else {
+                cellTextView.setText(String.valueOf(o));
+            }
+        }
+    }
+
+    /*
+    **********************************************************************
+    *
+    *                           PRIVATE METHODS
+    *
+    **********************************************************************
+    */
+
+    private void addRows(int newRows) {
+        for (int row = this.rows; row < newRows; row++) {
+            addRow(row, cols);
+        }
+    }
+
+    private void removeRows(int newRows) {
+        for (int row = this.rows - 1; row >= newRows; row--) {
+            removeRow(row);
+        }
+    }
+
+    private void addCols(int newCols) {
+        for (int row = NUMBER_INDEX; row < rows; row++) {
+            final ViewGroup rowView = getRow(row);
+            if (rowView != null) {
+                for (int col = this.cols; col < newCols; col++) {
+                    rowView.addView(createCellView(row, col));
+                }
+            }
+        }
+    }
+
+    private void removeCols(int newCols) {
+        for (int row = NUMBER_INDEX; row < rows; row++) {
+            final ViewGroup rowView = getRow(row);
+            if (rowView != null) {
+                for (int col = this.cols - 1; col >= newCols; col--) {
+                    final View cellView = getCell(rowView, row, col);
+                    if (cellView != null) {
+                        rowView.removeView(cellView);
+                    }
+                }
+            }
+        }
+    }
+
+    private void addRow(int row, int newCols) {
+        this.addView(createRowView(row, newCols));
+    }
+
+    private void removeRow(int row) {
+        final View rowView = getRow(row);
+        if (rowView != null) {
+            this.removeView(rowView);
+        }
+    }
+
+    @Nullable
+    private TableRow getRow(int row) {
+        return (TableRow) this.findViewWithTag(getRowTag(row));
+    }
+
+    @Nullable
+    private View getCell(@NotNull View view, int row, int col) {
+        return view.findViewWithTag(getCellTag(row, col));
+    }
+
+    @NotNull
+    private String getRowTag(int row) {
+        if (row != NUMBER_INDEX) {
+            return "row_" + row;
+        } else {
+            return "row_index";
+        }
+    }
+
+    @NotNull
+    private View createRowView(int row, int cols) {
+        final ViewGroup rowView = new TableRow(this.getContext());
+
+        rowView.setTag(getRowTag(row));
+
+        if (row != NUMBER_INDEX) {
+            rowView.addView(createCellView(row, NUMBER_INDEX));
+        } else {
+            // empty cell
+            rowView.addView(new View(this.getContext()));
+        }
+
+        for (int col = 0; col < cols; col++) {
+            rowView.addView(createCellView(row, col));
+        }
+        return rowView;
+    }
+
+    @NotNull
+    private View createCellView(int row, int col) {
+        final TextView result;
+
+        if (row != NUMBER_INDEX && col != NUMBER_INDEX) {
+            result = new EditText(this.getContext());
+            result.setText(defaultCellText);
+        } else {
+            result = new TextView(this.getContext());
+            if (row == NUMBER_INDEX) {
+                result.setText(String.valueOf(col + 1));
+            } else {
+                result.setText(String.valueOf(row + 1));
+            }
+        }
+
+        result.setTag(getCellTag(row, col));
+
+        return result;
+
+    }
+
+    @NotNull
+    private String getCellTag(int row, int col) {
+        if (row != NUMBER_INDEX) {
+            return "cell_" + row + "_" + col;
+        } else {
+            return "cell_index_" + col;
+        }
+    }
+
+}