Java JLabel Size getPreferredLabelSize(JLabel c, int widthHint)

Description

get Preferred Label Size

License

Open Source License

Declaration

public static Dimension getPreferredLabelSize(JLabel c, int widthHint) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2010 BSI Business Systems Integration AG.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:/*from  w ww  .j a v a  2  s.co  m*/
 *     BSI Business Systems Integration AG - initial API and implementation
 ******************************************************************************/

import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Insets;

import java.awt.Rectangle;

import javax.swing.Icon;

import javax.swing.JLabel;

import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;

import javax.swing.text.View;

public class Main {
    public static Dimension getPreferredLabelSize(JLabel c, int widthHint) {
        View v = (View) c.getClientProperty(javax.swing.plaf.basic.BasicHTML.propertyKey);
        if (v == null) {
            return c.getPreferredSize();
        }
        //
        String text = c.getText();
        Icon icon = c.isEnabled() ? c.getIcon() : c.getDisabledIcon();
        int hAlign = c.getHorizontalAlignment();
        int vAlign = c.getVerticalAlignment();
        int hTextPosition = c.getHorizontalTextPosition();
        int vTextPosition = c.getVerticalTextPosition();
        int iconTextGap = c.getIconTextGap();
        // int mnemonicIndex=c.getDisplayedMnemonicIndex();
        Font font = c.getFont();
        Insets insets = c.getInsets(new Insets(0, 0, 0, 0));
        //
        int dx = insets.left + insets.right;
        int dy = insets.top + insets.bottom;
        if (icon == null && (text == null || font == null)) {
            return new Dimension(dx, dy);
        } else if ((text == null) || ((icon != null) && (font == null))) {
            return new Dimension((icon != null ? icon.getIconWidth() : 0) + dx,
                    (icon != null ? icon.getIconHeight() : 0) + dy);
        } else {
            Rectangle iconR = new Rectangle();
            Rectangle textR = new Rectangle();
            Rectangle viewR = new Rectangle();
            FontMetrics fm = c.getFontMetrics(font);
            iconR.x = iconR.y = iconR.width = iconR.height = 0;
            textR.x = textR.y = textR.width = textR.height = 0;
            viewR.x = dx;
            viewR.y = dy;
            viewR.width = widthHint - dx;
            viewR.height = Short.MAX_VALUE;
            //PATCH BEGIN: set inner size of html view
            int availTextWidth;
            int gap = (icon == null) ? 0 : iconTextGap;

            if (hTextPosition == SwingConstants.CENTER) {
                availTextWidth = viewR.width;
            } else {
                availTextWidth = viewR.width - (((icon == null) ? 0 : icon.getIconWidth()) + gap);
            }
            v.setSize(availTextWidth, 0);
            //PATCH END
            SwingUtilities.layoutCompoundLabel(c, fm, text, icon, vAlign, hAlign, vTextPosition, hTextPosition,
                    viewR, iconR, textR, iconTextGap);
            int x1 = Math.min(iconR.x, textR.x);
            int x2 = Math.max(iconR.x + iconR.width, textR.x + textR.width);
            int y1 = Math.min(iconR.y, textR.y);
            int y2 = Math.max(iconR.y + iconR.height, textR.y + textR.height);
            Dimension rv = new Dimension(x2 - x1, y2 - y1);
            rv.width += dx;
            rv.height += dy;
            return rv;
        }
    }
}

Related

1. adjustLabelSizes(List labels)
2. getLabelPreferredSize(JLabel label)
3. getPreferredSize(JLabel label)
4. makeSameSize(int alignment, JLabel... labels)
5. resizeLabel(JLabel label, Dimension newDim)