Java JTextField Size setMinimumSizeFromCols(JTextField component)

Description

set Minimum Size From Cols

License

Apache License

Declaration

public static void setMinimumSizeFromCols(JTextField component) 

Method Source Code

//package com.java2s;
/*//from   w w  w  .j  a  va2  s . c  om
 * WbSwingUtilities.java
 *
 * This file is part of SQL Workbench/J, http://www.sql-workbench.net
 *
 * Copyright 2002-2015, Thomas Kellerer
 *
 * 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.
 *
 * To contact the author please send an email to: support@sql-workbench.net
 *
 */

import javax.swing.*;

import java.awt.*;

public class Main {
    public static void setMinimumSizeFromCols(JTextField component) {
        int columns = component.getColumns();
        component.setColumns(0);
        setMinimumSize(component, columns);
    }

    public static void setMinimumSize(JComponent component, int lines,
            int columns) {
        Font font = component.getFont();
        if (font != null) {
            FontMetrics fm = component.getFontMetrics(font);
            int width = fm.stringWidth("M");
            int height = fm.getHeight();
            Dimension d = new Dimension(width * columns, height * lines);
            component.setPreferredSize(d);
        }
    }

    public static void setMinimumSize(JComponent component, int numChars) {
        int width = calculateCharWidth(component, numChars);
        if (width > 0) {
            Dimension current = component.getPreferredSize();
            Dimension d = new Dimension(width, current.height);
            component.setPreferredSize(d);
        }
    }

    public static int calculateCharWidth(JComponent component, int numChars) {
        if (numChars < 0)
            return -1;
        if (component == null)
            return -1;

        int width = -1;
        Font font = component.getFont();
        if (font != null) {
            FontMetrics fm = component.getFontMetrics(font);
            int charWidth = fm.stringWidth("M");
            width = charWidth * numChars;
        }
        return width;
    }
}

Related

1. adjustSize(JTextField textField)
2. fixTextFieldSize(JTextField field)
3. fixTextFieldsSize(JTextField... jTextFields)