Application: gvSIG desktop » Library: org.gvsig.tools

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package org.gvsig.tools.swing.api;

import java.awt.Dimension;

import javax.swing.JComponent;

import javax.swing.JLabel;

/**

 *

 * @author gvSIG Team

 */

public class ToolsSwingUtils {

    private ToolsSwingUtils() {

    }

    private static double pixelsXrow = -1;

    private static double pixelsXcolumn = -1;

    private static void calculateRowsCols2Pixels() {

        String s = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPRSTUVWXYZ[]()!?|_/@";

        JLabel label = new JLabel(s);

        Dimension dim = label.getPreferredSize();

        pixelsXrow = dim.height;

        pixelsXcolumn = dim.width / s.length();

    }

    public static int rows2px(int rows) {

        if( pixelsXrow == -1 ) {

            calculateRowsCols2Pixels();

        }

        return (int) (rows * pixelsXrow);

    }

    public static int cols2px(int cols) {

        if( pixelsXcolumn == -1 ) {

            calculateRowsCols2Pixels();

        }

        return (int) (cols * pixelsXcolumn);

    }

    public static Dimension rowscols2dimension(int rows, int cols) {

        return new Dimension(cols2px(cols), rows2px(rows));

    }

    public static Dimension ensureRowsCols(JComponent comp, int rows, int cols) {

        Dimension dim = comp.getPreferredSize();

        return ensureRowsCols(dim, rows, cols);

    }

    public static Dimension ensureRowsCols(Dimension dim, int rows, int cols) {

        int h = rows2px(rows);

        if( dim.height < h ) {

            dim.height = h;

        }

        int w = cols2px(cols);

        if( dim.width < w ) {

            dim.width = w;

        }

        return dim;

    }

    public static Dimension ensureMaxRows(JComponent comp, int rows) {

        Dimension dim = comp.getPreferredSize();

        int h = rows2px(rows);

        if( dim.height > h ) {

            dim.height = h;

        }

        return dim;

    }

    public static Dimension ensureMaxRows(Dimension dim, int rows) {

        int h = rows2px(rows);

        if( dim.height > h ) {

            dim.height = h;

        }

        return dim;

    }

    public static Dimension ensureRows(Dimension dim, int rows) {

        int h = rows2px(rows);

        if( dim.height < h ) {

            dim.height = h;

        }

        return dim;

    }

    public static Dimension ensureCols(Dimension dim, int cols) {

        int w = cols2px(cols);

        if( dim.width < w ) {

            dim.width = w;

        }

        return dim;

    }

}