JTable（Nimbus L＆F）でデータを編集する場合、ユーザーがセルからセルにタブ移動すると、どのセルにフォーカスがあるかがわかりません。どのセルにフォーカスがあるかを明確にするにはどうすればよいですか？Nimbusを変更するために設定できるプロパティがいくつかあることを知っています-誰かが私が欲しいプロパティを知っていますか？
以下のスクリーンショットには、デフォルト以外に設定されたプロパティが1つだけあります。
UIManager.put("Table.showGrid", true);
あなたはレンダラーの概念を見てきました、
ニンバスのルックアンドフィールのdefaul作品によって、
いくつかの問題はJButtonsコンポーネント（JCheckBox ei）にある可能性がありますが、このフォーラムで数回回答または解決されています
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);
}
}
}
たとえば、選択した場合に前景色を変更するカスタムセルレンダラークラスを作成する必要があります。
クラスはDefaultTableCellRendererを拡張し、メソッドgetTableCellRendererComponent（JTableテーブル、オブジェクト値、boolean isSelected、boolean hasFocus、int行、int列）をオーバーライドします。
例えば
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;
}
}
次に、これを行うことにより、そのレンダラーをテーブル内のStringオブジェクトなどのデフォルトのレンダラーとして設定する必要があります。
table.setDefaultRenderer(Class.forName("java.lang.String"), new SpreadsheetCellRenderer());