Question

我尝试更改nimbus JProgressBar的默认颜色。我可以通过更改“nimbusOrange”来更改颜色全局。我喜欢这个结果。但我需要一个由nimbus在原始nimbusOrange中的ProgressBar和另一个包含在蓝色相同程序中的ProgressBar。我试试这个：

JProgressBar progressBar = new JProgressBar();

UIDefaults overrides = new UIDefaults();
overrides.put("nimbusOrange", Color.BLUE);
overrides.put("ProgressBar[Enabled].backgroundPainter", UIManager.get("ProgressBar[Enabled].backgroundPainter"));
//overrides.put("ProgressBar[Enabled].foregroundPainter", UIManager.get("ProgressBar[Enabled].foregroundPainter"));
progressBar.putClientProperty("Nimbus.Overrides", overrides);
progressBar.putClientProperty("Nimbus.Overrides.InheritDefaults", false);

但是，如果我将foregroundPainter放回代码，它只显示ProgressBar的正常橙色样式......

任何帮助？

亲切的问候 Highchiller

Answer 1

好的，我得到了解决方案，但它看起来很糟糕......如果有人知道更简单的解决方法，请告诉我。

我采用扩展AbstractRegionPainter的原始ProgressBarPainter.java。我将名称更改为BlueProgressBarPainter。它还在构造函数中获取PaintContext对象。此类是AbstractRegionPainter的受保护内部类。所以我将给定参数更改为Object并将其强制转换为构造函数。

毕竟构造函数看起来像：

public BlueProgressBarPainter(Object ctx, int state) {
    super();
    this.state = state;
    this.ctx = (AbstractRegionPainter.PaintContext)ctx;
}

此外，我们将“nimbusOrange”的所有访问权限更改为“internalBlue”，并在引入新的LookAndFeel之前将此新颜色（例如BLUE）添加到nimbus和该行：

UIManager.put("internalBlue", Color.BLUE);

好的......还好。现在我们必须将自己的画家添加到特定的progressBar中。但是我们需要原画家的AbstractRegionPainter.PaintContext对象。为此，我们需要反思！导致AbstractRegionPainter中的方法“getPaintContext（）”受到保护。

    // initialize progressBar
    JProgressBar progressBar = new JProgressBar();

    // create own UIDefaults
    UIDefaults overrides = new UIDefaults();
    BlueProgressBarPainter painter = null;

    // get the original AbstractRegionPainter of Nimbus
    AbstractRegionPainter abstractPainter = (AbstractRegionPainter)UIManager.get("ProgressBar[Enabled].foregroundPainter");

    // reflection begin
    try {
        Class<?> clazz = abstractPainter.getClass();
        // get the protected Method of AbstractRegionPainter
        Method protectedMethod = clazz.getDeclaredMethod("getPaintContext");
        protectedMethod.setAccessible(true);

        // create now our own Painter with the original AbstractRegionPainter.PaintContext
        painter = new BlueProgressBarPainter( 
                (Object) protectedMethod.invoke(abstractPainter) ,
                3 ); // 3 is constant for "FOREGROUND_ENABLED"
    } catch (Exception e) {} 

    // set original background painter
    overrides.put("ProgressBar[Enabled].backgroundPainter", UIManager.get("ProgressBar[Enabled].backgroundPainter"));
    // set own foreground painter
    overrides.put("ProgressBar[Enabled].foregroundPainter", painter);
    // accept overrides
    progressBar.putClientProperty("Nimbus.Overrides", overrides);
    progressBar.putClientProperty("Nimbus.Overrides.InheritDefaults", false);

我觉得这很难......但它对o.O呜呜很有用。

祝你好运， Highchiller

为一个组件更改Nimbus ProgressBar

1 个答案: