Java JFrame calculateMaxMenuItems(JFrame window)

Description

calculate Max Menu Items

License

Apache License

Declaration

public static int calculateMaxMenuItems(JFrame window) 

Method Source Code

//package com.java2s;
/*//ww  w. ja  v  a  2s  . com
 * 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 int calculateMaxMenuItems(JFrame window) {
        UIDefaults def = UIManager.getDefaults();
        Font itemFont = def.getFont("MenuItem.font");
        Font barFont = def.getFont("MenuBar.font");

        int itemHeight = 16;
        int barHeight = 24;

        FontMetrics fm = window.getFontMetrics(itemFont);
        if (fm != null) {
            itemHeight = fm.getHeight();
        } else {
            itemHeight = convertPointSizeToPixel(itemFont.getSize());
        }
        FontMetrics barMetrics = window.getFontMetrics(barFont);
        if (barMetrics != null) {
            barHeight = fm.getHeight();
        } else {
            barHeight = convertPointSizeToPixel(barFont.getSize());
        }

        Insets itemInsets = def.getInsets("MenuItem.margin");
        if (itemInsets != null) {
            itemHeight += itemInsets.top + itemInsets.bottom;
        }

        Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
        int screenHeight = (int) screen.getHeight();
        int usableHeight = screenHeight - barHeight * 3;
        int numItems = usableHeight / itemHeight;
        return numItems;
    }

    public static int convertPointSizeToPixel(int points) {
        int dpi = Toolkit.getDefaultToolkit().getScreenResolution();
        int pixel = points * dpi / 72;
        return pixel;
    }
}

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4. calcLocation(JFrame main, JDialog dialog)
5. calculateMaxMenuItems(JFrame window)
6. centre(JFrame frame)
7. centreJustifyFrame(final JFrame frame, final int y_position)
8. centreWindow(Window c, JFrame frame)
9. changeLookAndFeel(final String lookName, final JFrame frame)