復選框渲染器在JTable列中不正確

Question

我成功地將復選框添加到JTable的列中。 但我想使用我的自定義復選框，我修改了BooleanRender以擴展我的自定義復選框，它可以工作。問題是當我選中復選框時它會顯示默認的jCheckbox設計並顯示我的coustom復選框，它也會在我未選中時發生復選框。 這是我之前提出的問題

class  BooleanRenderer extends TriCheckBox implements TableCellRenderer, UIResource {

private static final long serialVersionUID = 1L;
private final Border noFocusBorder = new EmptyBorder(1, 1, 1, 1);

BooleanRenderer() {
    super();
    setHorizontalAlignment(JLabel.CENTER);
    setBorderPainted(true);
}

@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
    if (isSelected) {
        setForeground(table.getSelectionForeground());
        super.setBackground(table.getSelectionBackground());
    } else {
        setForeground(table.getForeground());
        setBackground(table.getBackground());
    }
    setSelected(value != null && ((Boolean) value).booleanValue());
    if (hasFocus) {
        setBorder(UIManager.getBorder("Table.focusCellHighlightBorder"));
    } else {
        setBorder(noFocusBorder);
    }
    return this;
}

}

public class TriCheckBox extends JCheckBox {
public static ImageIcon icon =new ImageIcon("src/checkbox_off.png");
public static ImageIcon smallIcon = new ImageIcon(icon.getImage().getScaledInstance (12, -1, Image.SCALE_SMOOTH));
public static ImageIcon iconDark =new ImageIcon("src/logo.png");
public static ImageIcon smallIconDark = new ImageIcon(iconDark.getImage().getScaledInstance (12, -1, Image.SCALE_SMOOTH));
public static ImageIcon iconBrown =new ImageIcon("src/checkbox_on.png");
public static ImageIcon smallIconBrown = new ImageIcon(iconBrown.getImage().getScaledInstance (12, -1, Image.SCALE_SMOOTH));
private boolean indeterminate;
@Override
public void paint(Graphics g) {
    if (isSelected()) {
        indeterminate = false;
    }
    if(indeterminate){
        setIcon(smallIconDark);
    }else if(isSelected()){
        setIcon(smallIconBrown);
    }else{
        setIcon(smallIcon);
    }
    super.paint(g);
}
public boolean isIndetermainate() {
    return indeterminate;
}
public void setIndetermainate(boolean indetermainate) {
    this.indeterminate = indetermainate;
    if (indetermainate) {
        setSelected(false);
        repaint();
    }
}

}

Answer 1

首先，覆蓋paint(...)方法不是一個好主意，如果你想做一些繪畫，請改寫paintComponent(...)方法。

在這種情況下，您沒有進行任何自定義繪制，因此您不需要覆蓋任何這些方法。 以下是您可以做的事情：

public class TriCheckBox extends JCheckBox {
    ....

    public void updateState() {
        if (isSelected()) {
            indeterminate = false;
        }
        if(indeterminate){
            setIcon(smallIconDark);
        }else if(isSelected()){
            setIcon(smallIconBrown);
        }else{
            setIcon(smallIcon);
        }
    }

    public void setIndetermainate(boolean indetermainate) {
        this.indeterminate = indetermainate;
        if (indetermainate) {
            setSelected(false);        
        }else{
            updateState();
        }
    }

    @Override
    public void setSelected(boolean selected){
        updateState();
    }
}

Answer 2

問題是，當我選中復選框時，它會立即顯示默認的jCheckbox設計並顯示我的coustom復選框，當我取消選中該復選框時也會發生這種情況。

首先來看看概念：編輯器和渲染器以及使用其他編輯器

就像您必須提供自定義TableCellRenderer ，您將不得不提供自定義TableCellEditor

然后添加@Titus建議的內容，您不應該在路徑中引用src

public static ImageIcon icon =new ImageIcon("src/checkbox_off.png");

需要成為

public static ImageIcon icon =new ImageIcon(TriCheckBox.class.getResource("/checkbox_off.png"));