java-如何制作带有渐变的JProgress栏

我正在使用Swing,并希望通过向其添加与应用程序主题匹配的柔和渐变来使其JProgress栏看起来更具吸引力.

我的进度条在我正在工作的JTable单元格中,但是我的当前示例使用渐变而不是JProgress栏本身来绘制单元格.我希望该单元格为纯白色,但进度条从浅灰色转到->深灰色,因为它变得更完整.

如果其他方法可以解决问题,请打开以不使用JProgress栏. (也许只是使用单元格渲染器？)

我的单元格渲染器

class JPBRenderer extends JProgressBar implements TableCellRenderer {

Batch batch;

public JPBRenderer() {
    super();
    setStringPainted(true);
    setBorderPainted(false);
    setOpaque(false); //EDIT 1
    setForeground(UIConfig.backgroundColor);
}

public Component getTableCellRendererComponent(JTable table, Object value,
        boolean isSelected, boolean hasFocus, int row, int column) {
    batch = ((BatchTableModel)table.getModel()).getBatchForRow(row);
    setMinimum(0);
    setMaximum(batch.getQuantityToProduce());
    setValue(batch.getQuantityCompleted());
    setString(GeneralUtils.formatNumber((batch.getQuantityCompleted()/batch.getQuantityToProduce())*100, 1) + " %");
    return this;
}

@Override
protected void paintComponent(Graphics g) {

    Color color2 = UIConfig.backgroundColor;
    Color color1 = UIConfig.backgroundColor.brighter().brighter();
    double value = 1;
    if(batch != null){
        value = batch.getQuantityCompleted()/batch.getQuantityToProduce();
    }
    int w = getWidth();
    int h = getHeight();
    Graphics2D g2d = (Graphics2D) g;

    GradientPaint gp = new GradientPaint(0, 0, color1, w, 0, color2);

    g2d.setPaint(gp);
    g2d.fillRect(0, 0, w, h);

    super.paintComponent(g);
}
}

我的批次课程包含…

public class Batch {
    private Integer id;
    private BigDecimal length;
    private int quantityToProduce;
    private int quantityCompleted;

    //Constructors and getters...
}

提前致谢！

解决方法:

您将需要一个自定义的ProgressBarUI,可能是从BasicProgressBarUI所示的here派生的.您可能可以使用现有的paintDeterminate()实现作为指南.看到一个应用于BasicSliderUI的LinearGradientPaint显示为here.

或者,考虑显示为here的ProgressIcon.

标签：jprogressbar,swing,tablecellrenderer,java
来源： https://codeday.me/bug/20191122/2056764.html