com.df3n5.gwtproc.client.util.MatrixWidget.java Source code

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Here is the source code for com.df3n5.gwtproc.client.util.MatrixWidget.java

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/**   
 * Copyright 2009-2010 Snke Sothmann, Steffen Schfer and others
 * 
 * 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.df3n5.gwtproc.client.util;

import com.df3n5.gwtproc.client.util.math.FloatMatrix;
import com.google.gwt.i18n.client.NumberFormat;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.Label;

/**
 * Widget to display a FloatMatrix.
 * 
 * @author Snke Sothmann
 * @author Steffen Schfer
 * 
 */
public class MatrixWidget extends Composite {

    private int width;
    private int height;
    private FlexTable flextable;
    static private NumberFormat formatter = NumberFormat.getFormat("#########0.00");

    /**
     * Constructs a new instance of the MatrixWidget to view a FloatMatrix of
     * the given size.
     * 
     * @param width
     *            column count of matrix
     * @param height
     *            row count of matrix
     * @param title
     *            the title of the matrix
     */
    public MatrixWidget(int width, int height, String title) {
        this.width = width;
        this.height = height;
        flextable = new FlexTable();
        flextable.setWidget(0, 0, new Label(title));
        flextable.getFlexCellFormatter().setColSpan(0, 0, width);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                flextable.setText(y + 1, x, "[" + String.valueOf(x) + "_" + String.valueOf(y) + "]");
            }
        }

        initWidget(flextable);

        setStyleName("matrixWidget");
    }

    /**
     * Set widget display data to data of the given FloatMatrix
     * 
     * @param matrix
     */
    public void setData(FloatMatrix matrix) {
        if (matrix == null) {
            return;
        }
        float[][] data = matrix.getData();
        for (int spalte = 0; spalte < width; spalte++) {
            for (int zeile = 0; zeile < height; zeile++) {
                flextable.setText(zeile + 1, spalte, "[" + formatter.format(data[zeile][spalte]) + "]");
            }
        }
    }
}