自定义按钮在mac上不工作（ButtonUI）

Question

我有一个应用程序，使用自定义按钮的所有地方的文本和图标。对于windows和linux来说效果很好，但是现在OSX的用户却在抱怨。文本不显示在mac上，只是“...”。代码看起来很简单，但我对Mac电脑一窍不通。我该怎么解决这个？

测试用例：

package example.swingx;
import example.utils.ResourceLoader;
import com.xduke.xlayouts.XTableLayout;    
import javax.swing.*;
import javax.swing.plaf.ComponentUI;
import java.awt.*;
import java.awt.event.ActionEvent;

public class SmallButton extends JButton {
    private static ComponentUI ui = new SmallButtonUI();
    public SmallButton() {
        super();
        /*  final RepaintManager repaintManager = RepaintManager.currentManager(this);
        repaintManager.setDoubleBufferingEnabled(false);
        setDebugGraphicsOptions(DebugGraphics.FLASH_OPTION);*/
    }
    public SmallButton(AbstractAction action) {
        super(action);
    }
    public SmallButton(String text) {
        super(text);
    }
    public SmallButton(Icon icon) {
        super(icon);
    }
    public void updateUI() {
        setUI(ui);
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        final JPanel buttonPanel = new JPanel(new XTableLayout());
        SmallButton firstSmallButton = new SmallButton("One");
        SmallButton secondSmallButton = new SmallButton("Two");
        SmallButton thirdSmallButton = new SmallButton();

        ImageIcon cameraIcon = (ImageIcon) ResourceLoader.getIcon("camera");
        SmallButton fourth = new SmallButton();

        fourth.setAction(new AbstractAction() {
            public void actionPerformed(ActionEvent e) {
                System.out.println("Fourth button pressed!");
            }
        });
        fourth.setIcon(cameraIcon);

        buttonPanel.add(firstSmallButton, "+");
        buttonPanel.add(secondSmallButton, "+");
        buttonPanel.add(thirdSmallButton, "+");
        buttonPanel.add(fourth, "+");

        final Container container = frame.getContentPane();
        container.add(buttonPanel);
        frame.pack();
        frame.setVisible(true);
    }
}

界面：

package example.swingx;

import javax.swing.*;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicButtonUI;
import java.awt.*;

public class SmallButtonUI extends BasicButtonUI {
    private static final Color FOCUS_COLOR = new Color(0, 0, 0);
    private static final Color BACKGROUND_COLOR = new Color(173, 193, 226);
    private static final Color SELECT_COLOR = new Color(102, 132, 186);
    private static final Color DISABLE_TEXT_COLOR = new Color(44, 44, 61);
    private static final Insets DEFAULT_SMALLBUTTON_MARGIN = new Insets(2, 4, 2, 4);

    private final static SmallButtonUI smallButtonUI = new SmallButtonUI();

    public static ComponentUI createUI(JComponent component) {
        return smallButtonUI;
    }
    protected Color getSelectColor() {
        return SELECT_COLOR;
    }
    protected Color getDisabledTextColor() {
        return DISABLE_TEXT_COLOR;
    }
    protected Color getFocusColor() {
        return FOCUS_COLOR;
    }

    public void paint(Graphics g, JComponent c) {
        ((Graphics2D) g).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        super.paint(g, c);
    }

    protected void paintButtonPressed(Graphics graphics, AbstractButton button) {
        if (button.isContentAreaFilled()) {
            Dimension size = button.getSize();
            graphics.setColor(getSelectColor());
            graphics.fillRect(0, 0, size.width, size.height);
        }
    }

    public Dimension getMinimumSize(JComponent component) {
        final AbstractButton button = ((AbstractButton) component);

        // Handle icon buttons:
        Icon buttonIcon = button.getIcon();
        if (buttonIcon != null) {
            return new Dimension(
                    buttonIcon.getIconWidth(),
                    buttonIcon.getIconHeight()
            );
        }

        // Handle text buttons:
        final Font fontButton = button.getFont();
        final FontMetrics fontMetrics = button.getFontMetrics(fontButton);
        final String buttonText = button.getText();
        if (buttonText != null) {
            final int buttonTextWidth = fontMetrics.stringWidth(buttonText);
            return new Dimension(buttonTextWidth + 15,
                    fontMetrics.getHeight() + 5);
        }
        return null;
    }

    protected void installDefaults(AbstractButton button) {
        super.installDefaults(button);
        button.setMargin(DEFAULT_SMALLBUTTON_MARGIN);
        button.setBackground(getBackgroundColor());
    }
    private Color getBackgroundColor() {
        return BACKGROUND_COLOR;
    }
    public Dimension getPreferredSize(JComponent component) {
        return getMinimumSize(component);
    }
    public Dimension getMaximumSize(JComponent component) {
        return super.getMinimumSize(component);
    }
    public SmallButtonUI() {
        super();
    }
}

编辑：调试后，似乎getMinimumSize（）在两个平台上是相同的。此外，当我停在任何使用图形的地方时，似乎mac的transY值为47，而linux的transY值为0。这47似乎也馈入裁剪区域。会在哪里设置？\“

Answer 1

您对首选大小的计算不正确。

BasicButtonUI使用SwingUtilities.LayoutCompoundLabel，在这里进行了研究。在标签中，如果字符串太长，就会添加省略号，但按钮的大小通常要适合其整个文本。

如果不能更好地理解上下文，我将使用sizevariant，如下所示。我还展示了一个简单的BasicButtonUI示例，使用了一个较小的派生Font。UI菜单可以与Quaqua配合使用进行测试。

import java.awt.Color;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.AbstractButton;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JToolBar;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.plaf.basic.BasicButtonUI;

/**
 * @see https://stackoverflow.com/a/14599176/230513
 * @see https://stackoverflow.com/a/11949899/230513
 */
public class Test {

    private void display() {
        JFrame f = new JFrame("Test");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setBackground(new Color(0xfff0f0f0));
        f.setLayout(new GridLayout(0, 1));
        f.add(createToolBar(f));
        f.add(variantPanel("mini"));
        f.add(variantPanel("small"));
        f.add(variantPanel("regular"));
        f.add(variantPanel("large"));
        JPanel customPanel = new JPanel();
        customPanel.add(createCustom("One"));
        customPanel.add(createCustom("Two"));
        customPanel.add(createCustom("Three"));
        f.add(customPanel);
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    }

    private static JPanel variantPanel(String size) {
        JPanel variantPanel = new JPanel();
        variantPanel.add(createVariant("One", size));
        variantPanel.add(createVariant("Two", size));
        variantPanel.add(createVariant("Three", size));
        return variantPanel;
    }

    private static JButton createVariant(String name, String size) {
        JButton b = new JButton(name);
        b.putClientProperty("JComponent.sizeVariant", size);
        return b;
    }

    private static JButton createCustom(String name) {
        JButton b = new JButton(name) {

            @Override
            public void updateUI() {
                super.updateUI();
                setUI(new CustomButtonUI());
            }
        };
        return b;
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                new Test().display();
            }
        });
    }

    private static class CustomButtonUI extends BasicButtonUI {

        private static final Color BACKGROUND_COLOR = new Color(173, 193, 226);
        private static final Color SELECT_COLOR = new Color(102, 132, 186);

        @Override
        protected void paintText(Graphics g, AbstractButton b, Rectangle r, String t) {
            super.paintText(g, b, r, t);
            g.setColor(SELECT_COLOR);
            g.drawRect(r.x, r.y, r.width, r.height);
        }

        @Override
        protected void paintFocus(Graphics g, AbstractButton b,
            Rectangle viewRect, Rectangle textRect, Rectangle iconRect) {
            super.paintFocus(g, b, viewRect, textRect, iconRect);
            g.setColor(Color.blue.darker());
            g.drawRect(viewRect.x, viewRect.y, viewRect.width, viewRect.height);
        }

        @Override
        protected void paintButtonPressed(Graphics g, AbstractButton b) {
            if (b.isContentAreaFilled()) {
                g.setColor(SELECT_COLOR);
                g.fillRect(0, 0, b.getWidth(), b.getHeight());
            }
        }

        @Override
        protected void installDefaults(AbstractButton b) {
            super.installDefaults(b);
            b.setFont(b.getFont().deriveFont(11f));
            b.setBackground(BACKGROUND_COLOR);
        }

        public CustomButtonUI() {
            super();
        }
    }

    private static JToolBar createToolBar(final Component parent) {
        final UIManager.LookAndFeelInfo[] available =
            UIManager.getInstalledLookAndFeels();
        List<String> names = new ArrayList<String>();
        for (UIManager.LookAndFeelInfo info : available) {
            names.add(info.getName());
        }
        final JComboBox combo = new JComboBox(names.toArray());
        String current = UIManager.getLookAndFeel().getName();
        combo.setSelectedItem(current);
        combo.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent ae) {
                int index = combo.getSelectedIndex();
                try {
                    UIManager.setLookAndFeel(
                        available[index].getClassName());
                    SwingUtilities.updateComponentTreeUI(parent);
                } catch (Exception e) {
                    e.printStackTrace(System.err);
                }
            }
        });
        JToolBar bar = new JToolBar("L&F");
        bar.setLayout(new FlowLayout(FlowLayout.LEFT));
        bar.add(combo);
        return bar;
    }
}