我正在更改由JPanel扩展的Custom类填充的JTable的LookAndFeel，但是我不能这样做。
我只编辑了我的代码，但仍然很长。
public class LAF_TableCustomContainer extends JFrame {
public LAF_TableCustomContainer() {
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setSize(300, 300);
setVisible(true);
setLocationRelativeTo(null);
}
public static void changeLAF(Container container, String laf) {
try {
UIManager.setLookAndFeel(laf);
} catch (ClassNotFoundException | InstantiationException
| IllegalAccessException | UnsupportedLookAndFeelException e) {
}
SwingUtilities.updateComponentTreeUI(container);
}
static final JFrame frame = new JFrame();
public JComponent makeUI() {
String[] hdrsObjects = {"PanelSpinnerRadioButton Class Column"};
Object[][] objectMatrix = new Object[3][1];
objectMatrix[0][0] = new PanelSpinnerRadioButtonData(false, 10, 40);
objectMatrix[1][0] = new PanelSpinnerRadioButtonData(true, 20, 40);
objectMatrix[2][0] = new PanelSpinnerRadioButtonData(false, 30, 40);
JTable table = new JTable(new DefaultTableModel(objectMatrix, hdrsObjects));
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
table.setRowHeight(30);
TableColumn tc = table.getColumn("PanelSpinnerRadioButton Class Column");
tc.setCellRenderer(new PSRBTableCellRenderer());
tc.setCellEditor(new PSRBTableCellEditor());
JPanel pH = new JPanel();
pH.setLayout(new BoxLayout(pH, BoxLayout.LINE_AXIS));
JButton bMetal = new JButton("Metal");
bMetal.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
changeLAF(LAF_TableCustomContainer.this, "javax.swing.plaf.metal.MetalLookAndFeel");
changeLAF(table, "javax.swing.plaf.metal.MetalLookAndFeel");
changeLAF(scrollPane, "javax.swing.plaf.metal.MetalLookAndFeel");
changeLAF((JPanel)table.getModel().getValueAt(0, 0), "javax.swing.plaf.metal.MetalLookAndFeel");
}
});
JButton bMotif = new JButton("Motif");
bMotif.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
changeLAF(LAF_TableCustomContainer.this, "com.sun.java.swing.plaf.motif.MotifLookAndFeel");
changeLAF(table, "com.sun.java.swing.plaf.motif.MotifLookAndFeel");
changeLAF(scrollPane, "com.sun.java.swing.plaf.motif.MotifLookAndFeel");
changeLAF((JPanel)table.getModel().getValueAt(0, 0), "com.sun.java.swing.plaf.motif.MotifLookAndFeel");
}
});
JButton bNimbus = new JButton("Nimbus");
bNimbus.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
changeLAF(LAF_TableCustomContainer.this, "javax.swing.plaf.nimbus.NimbusLookAndFeel");
changeLAF(table, "javax.swing.plaf.nimbus.NimbusLookAndFeel");
changeLAF(scrollPane, "javax.swing.plaf.nimbus.NimbusLookAndFeel");
changeLAF((JPanel)table.getModel().getValueAt(0, 0), "javax.swing.plaf.nimbus.NimbusLookAndFeel");
}
});
pH.add(bMetal);
pH.add(bMotif);
pH.add(bNimbus);
JPanel pV = new JPanel();
pV.setLayout(new BoxLayout(pV, BoxLayout.PAGE_AXIS));
pV.add(pH);
pV.add(scrollPane);
return pV;
}
public static void main(String... args) {
EventQueue.invokeLater(() -> {
LAF_TableCustomContainer f = new LAF_TableCustomContainer();
f.getContentPane().add(f.makeUI());
});
}
}
class PanelSpinnerRadioButtonData {
private boolean opt02 = false;
private Integer from = 0;
private Integer size = 1;
PanelSpinnerRadioButtonData() {
this(false, 5, 10);
}
PanelSpinnerRadioButtonData(boolean opt02, Integer from, Integer size) {
this.opt02 = opt02;
this.from = from;
this.size = size;
}
public boolean getOption() {
return opt02;
}
public Integer getFrom() {
return from;
}
public Integer getSize() {
return size;
}
}
class PanelSpinnerRadioButton extends JPanel {
public final JRadioButton jrbOption01 = new JRadioButton("01");
public final JRadioButton jrbOption02 = new JRadioButton("12");
public final JSpinner jspnValues = new JSpinner(new SpinnerNumberModel(5, 0, 10, 1));
private final JPanel panel = new JPanel();
PanelSpinnerRadioButton() {
this(new PanelSpinnerRadioButtonData(false, 20, 40));
}
PanelSpinnerRadioButton(PanelSpinnerRadioButtonData data) {
super();
panel.setLayout(new BoxLayout(panel, BoxLayout.LINE_AXIS));
panel.add(jrbOption01);
panel.add(jrbOption02);
panel.add(Box.createRigidArea(new Dimension(5, 0)));
panel.add(new JSeparator(JSeparator.VERTICAL));
panel.add(Box.createRigidArea(new Dimension(5, 0)));
panel.add(jspnValues);
ButtonGroup bg = new ButtonGroup();
bg.add(jrbOption01);
bg.add(jrbOption02);
((SpinnerNumberModel) jspnValues.getModel()).setMaximum(data.getSize());
setData(data);
init();
}
private void init() {
setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
setBackground(new Color(0, 0, 0, 0));
add(panel);
}
public void setData(PanelSpinnerRadioButtonData data) {
if (data.getOption()) {
jrbOption02.setSelected(true);
} else {
jrbOption01.setSelected(true);
}
((SpinnerNumberModel) jspnValues.getModel()).setValue(data.getFrom());
}
// Used in PSRBTableCellEditor.getCellEditorValue()
public PanelSpinnerRadioButtonData getData() {
return new PanelSpinnerRadioButtonData(
jrbOption02.isSelected(),
(Integer) ((SpinnerNumberModel) jspnValues.getModel()).getValue(),
(Integer) ((SpinnerNumberModel) jspnValues.getModel()).getMaximum());
}
}
class PSRBTableCellRenderer implements TableCellRenderer {
private final PanelSpinnerRadioButton renderer = new PanelSpinnerRadioButton();
@Override public Component getTableCellRendererComponent(
JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
if (value instanceof PanelSpinnerRadioButtonData) {
renderer.setData((PanelSpinnerRadioButtonData) value);
}
return renderer;
}
}
class PSRBTableCellEditor extends AbstractCellEditor implements TableCellEditor {
private final PanelSpinnerRadioButton editor = new PanelSpinnerRadioButton();
@Override public Object getCellEditorValue() {
return editor.getData();
}
@Override public Component getTableCellEditorComponent(
JTable table, Object value, boolean isSelected, int row, int column) {
if (value instanceof PanelSpinnerRadioButtonData) {
editor.setData((PanelSpinnerRadioButtonData) value);
}
return editor;
}
}
当我按下某个按钮时，除包含自定义JPanel的JTable的单元格外，所有JFrame都会更改。
我试图只强迫第一个牢房...
changeLAF((JPanel)table.getModel().getValueAt(0, 0), "javax.swing.plaf.metal.MetalLookAndFeel");
但我有例外:
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: PanelSpinnerRadioButtonData cannot be cast to javax.swing.JPanel
最佳答案
LookAndFeel不能更改PSRBTableCellRenderer不扩展JComponent，因此它不受LookAndFeel方法SwingUtilities # updateComponentTreeUI (...)更新的约束// @see javax/swing/SwingUtilities.java
public static void updateComponentTreeUI(Component c) {
updateComponentTreeUI0(c);
c.invalidate();
c.validate();
c.repaint();
}
private static void updateComponentTreeUI0(Component c) {
if (c instanceof JComponent) {
JComponent jc = (JComponent) c;
jc.updateUI();
JPopupMenu jpm =jc.getComponentPopupMenu();
if(jpm != null) {
updateComponentTreeUI(jpm);
}
}
Component[] children = null;
if (c instanceof JMenu) {
children = ((JMenu)c).getMenuComponents();
}
else if (c instanceof Container) {
children = ((Container)c).getComponents();
}
if (children != null) {
for (Component child : children) {
updateComponentTreeUI0(child);
}
}
}
您可以通过重写
JTable#updateUI()方法并重新创建单元格渲染器和编辑器来避免这种情况。JTable table = new JTable(new DefaultTableModel(objectMatrix, hdrsObjects)) {
@Override public void updateUI() {
super.updateUI();
setRowHeight(30);
TableColumn tc = getColumn("PanelSpinnerRadioButton Class Column");
tc.setCellRenderer(new PSRBTableCellRenderer());
tc.setCellEditor(new PSRBTableCellEditor());
}
};
LAF_TableCustomContainer2.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
public class LAF_TableCustomContainer2 extends JFrame {
public LAF_TableCustomContainer2() {
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setSize(300, 300);
setVisible(true);
setLocationRelativeTo(null);
}
public static void changeLAF(Container container, String laf) {
try {
UIManager.setLookAndFeel(laf);
} catch (ClassNotFoundException | InstantiationException
| IllegalAccessException | UnsupportedLookAndFeelException e) {
}
SwingUtilities.updateComponentTreeUI(container);
}
static final JFrame frame = new JFrame();
public JComponent makeUI() {
JPanel pV = new JPanel();
pV.setLayout(new BoxLayout(pV, BoxLayout.PAGE_AXIS));
String[] hdrsObjects = {"PanelSpinnerRadioButton Class Column"};
Object[][] objectMatrix = new Object[3][1];
objectMatrix[0][0] = new PanelSpinnerRadioButtonData(false, 10, 40);
objectMatrix[1][0] = new PanelSpinnerRadioButtonData(true, 20, 40);
objectMatrix[2][0] = new PanelSpinnerRadioButtonData(false, 30, 40);
JTable table = new JTable(new DefaultTableModel(objectMatrix, hdrsObjects)) {
@Override public void updateUI() {
super.updateUI();
setRowHeight(30);
TableColumn tc = getColumn("PanelSpinnerRadioButton Class Column");
tc.setCellRenderer(new PSRBTableCellRenderer());
tc.setCellEditor(new PSRBTableCellEditor());
}
};
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
// table.setRowHeight(30);
// TableColumn tc = table.getColumn("PanelSpinnerRadioButton Class Column");
// tc.setCellRenderer(new PSRBTableCellRenderer());
// tc.setCellEditor(new PSRBTableCellEditor());
JPanel pH = new JPanel();
pH.setLayout(new BoxLayout(pH, BoxLayout.LINE_AXIS));
JButton bMetal = new JButton("Metal");
bMetal.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
changeLAF(pV, "javax.swing.plaf.metal.MetalLookAndFeel");
}
});
JButton bMotif = new JButton("Motif");
bMotif.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
changeLAF(pV, "com.sun.java.swing.plaf.motif.MotifLookAndFeel");
}
});
JButton bNimbus = new JButton("Nimbus");
bNimbus.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
changeLAF(pV, "javax.swing.plaf.nimbus.NimbusLookAndFeel");
}
});
pH.add(bMetal);
pH.add(bMotif);
pH.add(bNimbus);
pV.add(pH);
pV.add(scrollPane);
return pV;
}
public static void main(String... args) {
EventQueue.invokeLater(() -> {
LAF_TableCustomContainer2 f = new LAF_TableCustomContainer2();
f.getContentPane().add(f.makeUI());
});
}
}
class PanelSpinnerRadioButtonData {
private boolean opt02 = false;
private Integer from = 0;
private Integer size = 1;
PanelSpinnerRadioButtonData() {
this(false, 5, 10);
}
PanelSpinnerRadioButtonData(boolean opt02, Integer from, Integer size) {
this.opt02 = opt02;
this.from = from;
this.size = size;
}
public boolean getOption() {
return opt02;
}
public Integer getFrom() {
return from;
}
public Integer getSize() {
return size;
}
}
class PanelSpinnerRadioButton extends JPanel {
public final JRadioButton jrbOption01 = new JRadioButton("01");
public final JRadioButton jrbOption02 = new JRadioButton("12");
public final JSpinner jspnValues = new JSpinner(new SpinnerNumberModel(5, 0, 10, 1));
private final JPanel panel = new JPanel();
PanelSpinnerRadioButton() {
this(new PanelSpinnerRadioButtonData(false, 20, 40));
}
PanelSpinnerRadioButton(PanelSpinnerRadioButtonData data) {
super();
panel.setLayout(new BoxLayout(panel, BoxLayout.LINE_AXIS));
panel.add(jrbOption01);
panel.add(jrbOption02);
panel.add(Box.createRigidArea(new Dimension(5, 0)));
panel.add(new JSeparator(JSeparator.VERTICAL));
panel.add(Box.createRigidArea(new Dimension(5, 0)));
panel.add(jspnValues);
ButtonGroup bg = new ButtonGroup();
bg.add(jrbOption01);
bg.add(jrbOption02);
((SpinnerNumberModel) jspnValues.getModel()).setMaximum(data.getSize());
setData(data);
init();
}
private void init() {
setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
setBackground(new Color(0, 0, 0, 0));
add(panel);
}
public void setData(PanelSpinnerRadioButtonData data) {
if (data.getOption()) {
jrbOption02.setSelected(true);
} else {
jrbOption01.setSelected(true);
}
((SpinnerNumberModel) jspnValues.getModel()).setValue(data.getFrom());
}
// Used in PSRBTableCellEditor.getCellEditorValue()
public PanelSpinnerRadioButtonData getData() {
return new PanelSpinnerRadioButtonData(
jrbOption02.isSelected(),
(Integer)((SpinnerNumberModel) jspnValues.getModel()).getValue(),
(Integer)((SpinnerNumberModel) jspnValues.getModel()).getMaximum());
}
}
class PSRBTableCellRenderer implements TableCellRenderer {
private final PanelSpinnerRadioButton renderer = new PanelSpinnerRadioButton();
@Override public Component getTableCellRendererComponent(
JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
if (value instanceof PanelSpinnerRadioButtonData) {
renderer.setData((PanelSpinnerRadioButtonData) value);
}
return renderer;
}
}
class PSRBTableCellEditor extends AbstractCellEditor implements TableCellEditor {
private final PanelSpinnerRadioButton editor = new PanelSpinnerRadioButton();
@Override public Object getCellEditorValue() {
return editor.getData();
}
@Override public Component getTableCellEditorComponent(
JTable table, Object value, boolean isSelected, int row, int column) {
if (value instanceof PanelSpinnerRadioButtonData) {
editor.setData((PanelSpinnerRadioButtonData) value);
}
return editor;
}
}