Question

我正在创建一个自定义按钮，我无法让它在大多数内置PLAF上看起来正确。

这是我的代码

public MyButton(String text, Icon icon) {
    if (icon == null) icon = createDefaultIcon();

    mainButton = new JButton(text);
    popupButton = new JButton(icon);

    removeBorder(mainButton);
    removeBorder(popupButton);

    setModel(new DefaultButtonModel());
    setBorder(UIManager.getBorder("Button.border"));

    int popupButtonWidth = popupButton.getPreferredSize().width;
    int popupButtonHeight = mainButton.getPreferredSize().height;
    Dimension popupButtonSize = new Dimension(popupButtonWidth, popupButtonHeight);

    popupButton.setMinimumSize(popupButtonSize);
    popupButton.setPreferredSize(popupButtonSize);
    popupButton.setMaximumSize(popupButtonSize);

    setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
    add(mainButton);
    add(new JSeparator(VERTICAL));
    add(popupButton);
}

private void removeBorder(JButton button) {
    Border border = button.getBorder();

    if (border instanceof CompoundBorder) {
         button.setBorder(((CompoundBorder) border).getInsideBorder());
    } else {
        button.setBorder(BorderFactory.createEmptyBorder());
    }
}

以下是按钮在计算机上安装的PLAF中的显示方式

金属

My Custom Button Metal PLAF Example

雨云

My Custom Button Nimbus PLAF Example

CDE /基序

My Custom Button CDE/Motif PLAF Example

Mac OS X

My Custom Button Mac OS PLAF Example

CDE / Motif是唯一正常运行的。我查看了一些ButtonUI的源代码，看起来他们可以忽略背景颜色和边框。不幸的是背景颜色和边框是我需要设置的。如何让我的自定义按钮正确支持内置PLAF？

修改根据要求，这是我用来生成图像的代码

public class MyButtonDemo implements Runnable {

    public void run() {
        // Change the array index to get a different PLAF
        try {
            UIManager.setLookAndFeel(UIManager.getInstalledLookAndFeels()[0].getClassName());
        } catch (Exception ignored) { }

        JFrame frame = new JFrame();
        frame.getContentPane().setLayout(new FlowLayout());
        frame.getContentPane().add(new MyButton("My Button", null);
        frame.getContentPane().add(new JButton("Normal Button"));
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new MyButtonDemo());
    }

}

Answer 1

欢迎来到可插拔外观的精彩世界;感觉。我能想到的唯一真正的选择就是提供。每个平台的UI代表或查看Syththetic UI

Answer 2

不确定我做了什么，但现在除了Nimbus之外它现在都在工作。这是代码

public MyButton(String text, Icon icon) {
    arrowIcon = createDefaultArrowIcon();
    mainButton = new JButton(text, icon);
    popupButton = new JButton(arrowIcon);

    mainButton.setBorder(BorderFactory.createEmptyBorder());
    popupButton.setBorder(BorderFactory.createEmptyBorder());

    setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
    add(mainButton);
    add(new JSeparator(VERTICAL));
    add(popupButton);

    setModel(new DefaultButtonModel());
    init(null, null);
}

@Override
public void updateUI() {
    setUI((ButtonUI)UIManager.getUI(this));
}

@Override
public String getUIClassID() {
    return "ButtonUI";
}

如何使用内置PLAF和自定义组件？

2 个答案: