在 JTable (Nimbus L & F) 中编辑数据时，当用户从一个单元格切换到另一个单元格时，哪个单元格具有焦点并不明显。我怎样才能更清楚哪个单元格有焦点？我知道可以设置许多属性来修改 Nimbus - 有人知道我想要哪个属性吗？
下面的屏幕截图只有一个属性设置为默认值以外的其他属性：
UIManager.put("Table.showGrid", true);
问问题
3244 次
2 回答
3
你看看渲染器的概念，
默认情况下适用于Nimbus Look and Feel，
JButtons 组件 (JCheckBox ei)可能有一些问题，但在这个论坛上回答或解决了几次
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.Graphics;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
import javax.swing.Icon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.RowSorter.SortKey;
import javax.swing.SortOrder;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;
public class ImageChangeDemo extends JFrame {
private static final long serialVersionUID = 1L;
private JTable table = new javax.swing.JTable();
private JTable table1 = new javax.swing.JTable();
private static Icon ascendingSortIcon;
private static Icon descendingSortIcon;
public static void main(String args[]) {
//comment out the code below to try in Metal L&F
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
ascendingSortIcon = UIManager.getLookAndFeelDefaults().getIcon("Table.ascendingSortIcon");
descendingSortIcon = UIManager.getLookAndFeelDefaults().getIcon("Table.descendingSortIcon");
//UIManager.getLookAndFeelDefaults().put("Table.ascendingSortIcon", new BevelArrowIcon(BevelArrowIcon.UP, false, false));
//UIManager.getLookAndFeelDefaults().put("Table.descendingSortIcon", new BevelArrowIcon(BevelArrowIcon.DOWN, false, false));
break;
}
}
} catch (Exception ex) {
ex.printStackTrace();
}
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new ImageChangeDemo().setVisible(true);
}
});
}
public ImageChangeDemo() {
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
JScrollPane pane = new javax.swing.JScrollPane();
//table.setAutoCreateRowSorter(true);
table.setModel(new javax.swing.table.DefaultTableModel(
new Object[][]{
{"a", "q", "h", "v"},
{"b", "m", "l", "h"},
{"d", "c", "a", "d"},
{"j", "o", "y", "e"}
},
new String[]{
"Col 1", "Col 2", "Col 3", "Col 4"
}) {
private static final long serialVersionUID = 1L;
Class[] types = new Class[]{
String.class, String.class, String.class, String.class
};
@Override
public Class getColumnClass(int columnIndex) {
return types[columnIndex];
}
});
TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(table.getModel()) {
@Override
public void toggleSortOrder(int column) {
if (column >= 0 && column < getModelWrapper().getColumnCount() && isSortable(column)) {
List<SortKey> keys = new ArrayList<SortKey>(getSortKeys());
if (!keys.isEmpty()) {
SortKey sortKey = keys.get(0);
if (sortKey.getColumn() == column && sortKey.getSortOrder() == SortOrder.DESCENDING) {
setSortKeys(null);
return;
}
}
}
super.toggleSortOrder(column);
}
};
table.setRowSorter(sorter);
table.setPreferredScrollableViewportSize(table.getPreferredSize());
pane.setViewportView(table);
UIManager.getLookAndFeelDefaults().put("Table.ascendingSortIcon", new BevelArrowIcon(BevelArrowIcon.UP, false, false));
UIManager.getLookAndFeelDefaults().put("Table.descendingSortIcon", new BevelArrowIcon(BevelArrowIcon.DOWN, false, false));
SwingUtilities.updateComponentTreeUI(table);
add(pane, BorderLayout.NORTH);
JScrollPane pane1 = new javax.swing.JScrollPane();
//table.setAutoCreateRowSorter(true);
table1.setModel(new javax.swing.table.DefaultTableModel(
new Object[][]{
{"a", "q", "h", "v"},
{"b", "m", "l", "h"},
{"d", "c", "a", "d"},
{"j", "o", "y", "e"}
},
new String[]{
"Col 1", "Col 2", "Col 3", "Col 4"
}) {
private static final long serialVersionUID = 1L;
Class[] types = new Class[]{
String.class, String.class, String.class, String.class
};
@Override
public Class getColumnClass(int columnIndex) {
return types[columnIndex];
}
});
table1.setRowSorter(sorter);
table1.setPreferredScrollableViewportSize(table1.getPreferredSize());
pane1.setViewportView(table1);
add(pane1, BorderLayout.SOUTH);
for (int i = 0; i < table1.getColumnCount(); i++) {
RowColorRenderer rowRenderer = new RowColorRenderer(i);
TableColumn column = table1.getColumnModel().getColumn(i);
column.setCellRenderer(rowRenderer);
}
pack();
}
private class RowColorRenderer extends DefaultTableCellRenderer {
private static final long serialVersionUID = 1L;
private int colNo = 0;
RowColorRenderer(int col) {
colNo = col;
}
@Override
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
Component comp = super.getTableCellRendererComponent(table, value,
isSelected, hasFocus, row, column);
JComponent jc = (JComponent) comp;
if (!isSelected) {
if (table.getValueAt(row, colNo) != null) {
String str = table.getValueAt(row, colNo).toString();
if (!str.isEmpty()) {
if (Pattern.compile("\\d").matcher(str).find()) {
if (((Pattern.compile("[02468]").matcher(str).find()))
&& (!(Pattern.compile("[13579]").matcher(str).find()))) {
setForeground(Color.magenta);
setBackground(Color.orange);
} else if ((!(Pattern.compile("[02468]").matcher(str).find()))
&& ((Pattern.compile("[13579]").matcher(str).find()))) {
setForeground(Color.blue);
setBackground(Color.yellow);
} else if (((Pattern.compile("[02468]").matcher(str).find()))
&& ((Pattern.compile("[13579]").matcher(str).find()))) {
setForeground(Color.red);
setBackground(Color.cyan);
}
setFont(new Font("Serif", Font.BOLD, 12));
setHorizontalAlignment(CENTER);
} else {
setBackground(table.getBackground());
setForeground(table.getForeground());
setFont(new Font("Serif", Font.PLAIN, 8));
setHorizontalAlignment(CENTER);
}
}
}
} else {
if (hasFocus) {
setFont(new Font("Serif", Font.BOLD, 12));
setForeground(Color.magenta);
setBackground(Color.orange);
}
}
return this;
}
}
static class BevelArrowIcon implements Icon {
public static final int UP = 0; // direction
public static final int DOWN = 1;
private static final int DEFAULT_SIZE = 11;
private Color edge1;
private Color edge2;
private Color fill;
private int size;
private int direction;
public BevelArrowIcon(int direction, boolean isRaisedView, boolean isPressedView) {
if (isRaisedView) {
if (isPressedView) {
init(UIManager.getColor("controlLtHighlight"), UIManager.getColor("controlDkShadow"), UIManager.getColor("controlShadow"), DEFAULT_SIZE, direction);
} else {
init(UIManager.getColor("controlHighlight"), UIManager.getColor("controlShadow"), UIManager.getColor("control"), DEFAULT_SIZE, direction);
}
} else {
if (isPressedView) {
init(UIManager.getColor("controlDkShadow"), UIManager.getColor("controlLtHighlight"), UIManager.getColor("controlShadow"), DEFAULT_SIZE, direction);
} else {
init(UIManager.getColor("controlShadow"), UIManager.getColor("controlHighlight"), UIManager.getColor("control"), DEFAULT_SIZE, direction);
}
}
}
public BevelArrowIcon(Color edge1, Color edge2, Color fill, int size, int direction) {
init(edge1, edge2, fill, size, direction);
}
@Override
public void paintIcon(Component c, Graphics g, int x, int y) {
switch (direction) {
case DOWN:
drawDownArrow(g, x, y);
break;
case UP:
drawUpArrow(g, x, y);
break;
}
}
@Override
public int getIconWidth() {
return size;
}
@Override
public int getIconHeight() {
return size;
}
private void init(Color edge1, Color edge2, Color fill, int size, int direction) {
edge1 = Color.red;
edge2 = Color.blue;
this.edge1 = edge1;
this.edge2 = edge2;
this.fill = fill;
this.size = size;
this.direction = direction;
}
private void drawDownArrow(Graphics g, int xo, int yo) {
g.setColor(edge1);
g.drawLine(xo, yo, xo + size - 1, yo);
g.drawLine(xo, yo + 1, xo + size - 3, yo + 1);
g.setColor(edge2);
g.drawLine(xo + size - 2, yo + 1, xo + size - 1, yo + 1);
int x = xo + 1;
int y = yo + 2;
int dx = size - 6;
while (y + 1 < yo + size) {
g.setColor(edge1);
g.drawLine(x, y, x + 1, y);
g.drawLine(x, y + 1, x + 1, y + 1);
if (0 < dx) {
g.setColor(fill);
g.drawLine(x + 2, y, x + 1 + dx, y);
g.drawLine(x + 2, y + 1, x + 1 + dx, y + 1);
}
g.setColor(edge2);
g.drawLine(x + dx + 2, y, x + dx + 3, y);
g.drawLine(x + dx + 2, y + 1, x + dx + 3, y + 1);
x += 1;
y += 2;
dx -= 2;
}
g.setColor(edge1);
g.drawLine(xo + (size / 2), yo + size - 1, xo + (size / 2), yo + size - 1);
}
private void drawUpArrow(Graphics g, int xo, int yo) {
g.setColor(edge1);
int x = xo + (size / 2);
g.drawLine(x, yo, x, yo);
x--;
int y = yo + 1;
int dx = 0;
while (y + 3 < yo + size) {
g.setColor(edge1);
g.drawLine(x, y, x + 1, y);
g.drawLine(x, y + 1, x + 1, y + 1);
if (0 < dx) {
g.setColor(fill);
g.drawLine(x + 2, y, x + 1 + dx, y);
g.drawLine(x + 2, y + 1, x + 1 + dx, y + 1);
}
g.setColor(edge2);
g.drawLine(x + dx + 2, y, x + dx + 3, y);
g.drawLine(x + dx + 2, y + 1, x + dx + 3, y + 1);
x -= 1;
y += 2;
dx += 2;
}
g.setColor(edge1);
g.drawLine(xo, yo + size - 3, xo + 1, yo + size - 3);
g.setColor(edge2);
g.drawLine(xo + 2, yo + size - 2, xo + size - 1, yo + size - 2);
g.drawLine(xo, yo + size - 1, xo + size, yo + size - 1);
}
}
}
于 2012-07-01T07:14:51.093 回答
1
您需要创建一个自定义单元格渲染器类，例如，如果选择该类，它将更改前景色。
您的类将扩展 DefaultTableCellRenderer并覆盖方法 getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)。
例如
public class SpreadsheetCellRenderer extends DefaultTableCellRenderer {
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
/* the following is the similar to DefaultTableCellRenderer */
if (isSelected) {
super.setForeground(Color.red);
} else {
super.setForeground(Color.black);
}
setText(value.toString());
return this;
}
}
然后，您需要通过执行此操作将该渲染器设置为表中的字符串对象的默认渲染器。
table.setDefaultRenderer(Class.forName("java.lang.String"), new SpreadsheetCellRenderer());
于 2012-07-01T07:34:49.027 回答