/*
* Copyright 2013 serso aka se.solovyev
*
* 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.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* Contact details
*
* Email: se.solovyev@gmail.com
* Site: http://se.solovyev.org
*/
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 javax.annotation.Nonnull;
import javax.annotation.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);
}
final boolean rowsChanged = this.rows != newRows;
final 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(@Nonnull 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]);
}
}
}
@Nonnull
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(@Nonnull View view, int row, int col) {
return view.findViewWithTag(getCellTag(row, col));
}
@Nonnull
private String getRowTag(int row) {
if (row != NUMBER_INDEX) {
return "row_" + row;
} else {
return "row_index";
}
}
@Nonnull
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;
}
@Nonnull
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;
}
@Nonnull
private String getCellTag(int row, int col) {
if (row != NUMBER_INDEX) {
return "cell_" + row + "_" + col;
} else {
return "cell_index_" + col;
}
}
}