本文介绍了JTable prepareEditor的工作原理的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我不明白prepareEditor是如何工作的，我无法使用prepareEditor中的Action为prepareRenderer设置可见性规则，因为我在附加图像中捕获了
I don't understand how prepareEditor works, I'm not able set visibility rules for prepareRenderer with Action from prepareEditor, as I captured in attached Image
第一行的规则正如我所料，如果没有选择JCheckBox，其他TableCells是不可见的（使用JTable选择hightlighter），但是如果我在1.st TableColumn中选择JCheckBox，那么我不能只显示Rule + Mail TableColumn，只能显示TableRow中的所有组件，我怎样才能实现
rules for 1.st row works as I expected, other TableCells are un-visible if JCheckBox isn't selected (with JTable selection hightlighter too), but if I select JCheckBox in 1.st TableColumn, then I can't shows only Rule + Mail TableColumn, only to shows all Components in the TableRow, how can I archieve that
import java.awt.Component;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TableWithCheckBoxOrBlank {
private Object[] columns = new Object[]{
"Select", "Name", "Rule", "Mail", "Include", "Phone"};
private Object[][] data = {
{false, "Bill", false, "Blabla@bla", false, "00 000 000"},
{false, "Edd", false, "Blabla@bla", false, "00 000 000"},
{false, "Paul", false, "Blabla@bla", false, "00 000 000"},
{false, "ZOO", false, "Blabla@bla", false, "00 000 000"}};
public void makeUI() {
DefaultTableModel model = new DefaultTableModel(data, columns) {
private static final long serialVersionUID = 1L;
@Override
public boolean isCellEditable(int row, int column) {
return column != 1;
}
@Override
public Class getColumnClass(int columnIndex) {
switch (columnIndex) {
case 0:
return Boolean.class;
case 1:
return String.class;
case 2:
return Boolean.class;
case 3:
return String.class;
case 4:
return Boolean.class;
case 5:
return String.class;
}
return null;
}
};
final JTable table = new JTable(model) {
private static final long serialVersionUID = 1L;
@Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component c = super.prepareRenderer(renderer, row, column);
if (column == 0 || column == 1 || (Boolean) getValueAt(row, 0)) {
return c;
}
return Box.createRigidArea(c.getPreferredSize());
}
@Override
public Component prepareEditor(TableCellEditor editor, int row, int column) {
Component c = super.prepareEditor(editor, row, column);
if (column == 0 || column == 1 || (Boolean) getValueAt(row, 0)) {
return c;
}
return Box.createRigidArea(c.getPreferredSize());
}
};
model.addTableModelListener(new TableModelListener() {
@Override
public void tableChanged(TableModelEvent e) {
if (e.getColumn() == 0) {
if ((Boolean) table.getValueAt(table.getSelectedRow(), 0)) {
table.setValueAt(Boolean.FALSE, table.getSelectedRow(), 2);
}
table.repaint();
}
}
});
JScrollPane scroll = new JScrollPane(table);
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JFrame frame = new JFrame("Table With Check Box Or Blank");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocation(150, 150);
frame.add(scroll);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new TableWithCheckBoxOrBlank().makeUI();
}
});
}
}
+++
编辑真的没有包括在内，我看不到森林中的树木： - （
EDIT really no baterry included, I can't see the forest for the trees :-(
感谢@camickr眼睛之间的踢，到处都有很多重大错误/问题...
thanks to @camickr for kick between eyes, there were lots of big mistakes/problems everywhere...
import java.awt.Component;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TableWithCheckBoxOrBlank {
private Object[] columns = new Object[]{
"Select", "Name", "Rule", "Mail", "Include", "Phone"};
private Object[][] data = {
{false, "Bill", false, "Blabla@bla", false, "00 000 000"},
{false, "Edd", false, "Blabla@bla", false, "00 000 000"},
{false, "Paul", false, "Blabla@bla", false, "00 000 000"},
{false, "ZOO", false, "Blabla@bla", false, "00 000 000"}};
public void makeUI() {
DefaultTableModel model = new DefaultTableModel(data, columns) {
private static final long serialVersionUID = 1L;
@Override
public boolean isCellEditable(int row, int column) {
if (column == 0 || column == 2 || column == 4) {
return true;
}
if (column == 1 || column == 3 || column == 5) {
return false;
}
return (Boolean) getValueAt(row, 0);
}
@Override
public Class getColumnClass(int columnIndex) {
switch (columnIndex) {
case 0:
return Boolean.class;
case 1:
return String.class;
case 2:
return Boolean.class;
case 3:
return String.class;
case 4:
return Boolean.class;
case 5:
return String.class;
}
return null;
}
};
final JTable table = new JTable(model) {
private static final long serialVersionUID = 1L;
@Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component c = super.prepareRenderer(renderer, row, column);
if ((column == 4 || column == 5) && (Boolean) getValueAt(row, 2)) {
return c;
} else if ((column == 2 || column == 3) && (Boolean) getValueAt(row, 0)) {
return c;
} else if (column == 0 || column == 1) {
return c;
}
return Box.createRigidArea(c.getPreferredSize());
}
@Override
public Component prepareEditor(TableCellEditor editor, int row, int column) {
Component c = super.prepareEditor(editor, row, column);
if ((column == 4 || column == 5) && (Boolean) getValueAt(row, 2)) {
return c;
} else if ((column == 2 || column == 3) && (Boolean) getValueAt(row, 0)) {
return c;
} else if (column == 0 || column == 1) {
return c;
}
return Box.createRigidArea(c.getPreferredSize());
}
};
model.addTableModelListener(new TableModelListener() {
@Override
public void tableChanged(TableModelEvent e) {
if (e.getColumn() == 0) {
if ((Boolean) table.getValueAt(table.getSelectedRow(), 0)) {
table.setValueAt(Boolean.FALSE, table.getSelectedRow(), 2);
}
table.repaint();
} else if (e.getColumn() == 2) {
if ((Boolean) table.getValueAt(table.getSelectedRow(), 2)) {
table.setValueAt(Boolean.FALSE, table.getSelectedRow(), 4);
}
table.repaint();
}
}
});
JScrollPane scroll = new JScrollPane(table);
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JFrame frame = new JFrame("Table With Check Box Or Blank");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocation(150, 150);
frame.add(scroll);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new TableWithCheckBoxOrBlank().makeUI();
}
});
}
}
推荐答案
我认为 prepareRenderer（...）代码应为：
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component c = super.prepareRenderer(renderer, row, column);
if ((column == 2 || column == 3) && (Boolean)getValueAt(row, 0)) {
return c;
}
// if (column == 0 || column == 1 || (Boolean) getValueAt(row, 0)) {
if (column == 0 || column == 1) {
return c;
}
return Box.createRigidArea(c.getPreferredSize());
}
然后你应该摆脱 prepareEditor（。 ..）代码。相反，你应该在 isCellEditable（...）方法中有更多的逻辑。类似于：
Then you should get rid of the prepareEditor(...) code. Instead you should have more logic in the isCellEditable(...) method. Something like:
public boolean isCellEditable(int row, int column) {
if (column == 0) return true;
if (column == 1 || column == 4 || column == 5) return false;
return (Boolean)getValueAt(row, 0);
}
这篇关于JTable prepareEditor的工作原理的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！