可分组 table header,过滤器低于 header
Groupable table header with filter below header
问题
我想创建一个可分组的 table header,在 header.
下面有一个过滤行
我想最直接的方法是将过滤器组件包含在 header 中。问题是组件不是 editable.
我进行了搜索,但没有找到好的或可行的方法。到目前为止,我找到的关于过滤器组件的最佳可行解决方案是将它们放在 table 之外。但是当你有一组 table 时,它看起来和感觉都很丑陋。它们必须低于 header。将过滤器组件放在页脚中也不是一个选项。
我使用了可分组的 table header 代码形式 this thread 并添加了一个过滤器组件。
现在的问题是,当我点击组件时,我无法访问它们。而是触发行排序。即使向文本字段添加鼠标侦听器也无济于事。
问题
有谁知道如何在 table header editable 中制作文本字段?或者有人有更好的方法将 table 过滤器放在 table header 下方吗?
代码
目前的代码:
FilterHeader.java
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.border.EmptyBorder;
public class FilterHeader extends JPanel {
public FilterHeader( JTable table, Object value, int columnIndex) {
setLayout( new BorderLayout());
// header
JLabel header = new JLabel();
header.setForeground(table.getTableHeader().getForeground());
header.setBackground(table.getTableHeader().getBackground());
header.setFont(table.getTableHeader().getFont());
header.setHorizontalAlignment(JLabel.CENTER);
header.setText(value.toString());
header.setBorder(UIManager.getBorder("TableHeader.cellBorder"));
add( header, BorderLayout.CENTER);
// append filter components to header
if( columnIndex == 3) {
JComboBox cb = new JComboBox();
cb.setBackground(Color.yellow);
cb.setBorder(UIManager.getBorder("TableHeader.cellBorder"));
cb.setBorder(new EmptyBorder(0, 0, 0, 0));
cb.setForeground(table.getTableHeader().getForeground());
cb.setPreferredSize(new Dimension(0,table.getRowHeight() + 4));
add( cb, BorderLayout.SOUTH);
} else {
JTextField tf = new JTextField( "enter filtertext");
tf.setBackground(Color.yellow);
tf.setBorder(UIManager.getBorder("TableHeader.cellBorder"));
tf.setForeground(table.getTableHeader().getForeground());
tf.setHorizontalAlignment(JLabel.CENTER);
add( tf, BorderLayout.SOUTH);
tf.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
System.out.println("textfield clicked"); // doesn't work
}
});
}
}
}
ColumnGroup.java
import java.awt.Component;
import java.awt.Dimension;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
public class ColumnGroup {
protected TableCellRenderer renderer;
protected List<TableColumn> columns;
protected List<ColumnGroup> groups;
protected String text;
protected int margin = 0;
public ColumnGroup(String text) {
this(text, null);
}
public ColumnGroup(String text, TableCellRenderer renderer) {
this.text = text;
this.renderer = renderer;
this.columns = new ArrayList<TableColumn>();
this.groups = new ArrayList<ColumnGroup>();
}
public void add(TableColumn column) {
columns.add(column);
}
public void add(ColumnGroup group) {
groups.add(group);
}
/**
* @param column
* TableColumn
*/
public List<ColumnGroup> getColumnGroups(TableColumn column) {
if (!contains(column)) {
return Collections.emptyList();
}
List<ColumnGroup> result = new ArrayList<ColumnGroup>();
result.add(this);
if (columns.contains(column)) {
return result;
}
for (ColumnGroup columnGroup : groups) {
result.addAll(columnGroup.getColumnGroups(column));
}
return result;
}
private boolean contains(TableColumn column) {
if (columns.contains(column)) {
return true;
}
for (ColumnGroup group : groups) {
if (group.contains(column)) {
return true;
}
}
return false;
}
public TableCellRenderer getHeaderRenderer() {
return renderer;
}
public void setHeaderRenderer(TableCellRenderer renderer) {
this.renderer = renderer;
}
public String getHeaderValue() {
return text;
}
public Dimension getSize(JTable table) {
TableCellRenderer renderer = this.renderer;
if (renderer == null) {
renderer = table.getTableHeader().getDefaultRenderer();
}
Component comp = renderer.getTableCellRendererComponent(table, getHeaderValue() == null || getHeaderValue().trim().isEmpty() ? " "
: getHeaderValue(), false, false, -1, -1);
int height = comp.getPreferredSize().height;
int width = 0;
for (ColumnGroup columnGroup : groups) {
width += columnGroup.getSize(table).width;
}
for (TableColumn tableColumn : columns) {
width += tableColumn.getWidth();
width += margin;
}
return new Dimension(width, height);
}
public void setColumnMargin(int margin) {
this.margin = margin;
for (ColumnGroup columnGroup : groups) {
columnGroup.setColumnMargin(margin);
}
}
}
GroupableTableHeader.java
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
@SuppressWarnings("serial")
public class GroupableTableHeader extends JTableHeader {
@SuppressWarnings("unused")
private static final String uiClassID = "GroupableTableHeaderUI";
protected List<ColumnGroup> columnGroups = new ArrayList<ColumnGroup>();
public GroupableTableHeader(TableColumnModel model) {
super(model);
setUI(new GroupableTableHeaderUI());
setReorderingAllowed(false);
// setDefaultRenderer(new MultiLineHeaderRenderer());
}
@Override
public void updateUI() {
setUI(new GroupableTableHeaderUI());
}
@Override
public void setReorderingAllowed(boolean b) {
super.setReorderingAllowed(false);
}
public void addColumnGroup(ColumnGroup g) {
columnGroups.add(g);
}
public List<ColumnGroup> getColumnGroups(TableColumn col) {
for (ColumnGroup group : columnGroups) {
List<ColumnGroup> groups = group.getColumnGroups(col);
if (!groups.isEmpty()) {
return groups;
}
}
return Collections.emptyList();
}
public void setColumnMargin() {
int columnMargin = getColumnModel().getColumnMargin();
for (ColumnGroup group : columnGroups) {
group.setColumnMargin(columnMargin);
}
}
}
GroupableTableHeaderUI.java
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.swing.JComponent;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.plaf.basic.BasicTableHeaderUI;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class GroupableTableHeaderUI extends BasicTableHeaderUI {
protected GroupableTableHeader getHeader() {
return (GroupableTableHeader) header;
}
@Override
public void paint(Graphics g, JComponent c) {
Rectangle clipBounds = g.getClipBounds();
if (header.getColumnModel().getColumnCount() == 0) {
return;
}
int column = 0;
Dimension size = header.getSize();
Rectangle cellRect = new Rectangle(0, 0, size.width, size.height);
Map<ColumnGroup, Rectangle> groupSizeMap = new HashMap<ColumnGroup, Rectangle>();
for (Enumeration<TableColumn> enumeration = header.getColumnModel().getColumns(); enumeration.hasMoreElements();) {
cellRect.height = size.height;
cellRect.y = 0;
TableColumn aColumn = enumeration.nextElement();
List<ColumnGroup> groups = getHeader().getColumnGroups(aColumn);
int groupHeight = 0;
for (ColumnGroup group : groups) {
Rectangle groupRect = groupSizeMap.get(group);
if (groupRect == null) {
groupRect = new Rectangle(cellRect);
Dimension d = group.getSize(header.getTable());
groupRect.width = d.width;
groupRect.height = d.height;
groupSizeMap.put(group, groupRect);
}
paintCell(g, groupRect, group);
groupHeight += groupRect.height;
cellRect.height = size.height - groupHeight;
cellRect.y = groupHeight;
}
cellRect.width = aColumn.getWidth();
if (cellRect.intersects(clipBounds)) {
paintCell(g, cellRect, column);
}
cellRect.x += cellRect.width;
column++;
}
}
private void paintCell(Graphics g, Rectangle cellRect, int columnIndex) {
TableColumn aColumn = header.getColumnModel().getColumn(columnIndex);
TableCellRenderer renderer = aColumn.getHeaderRenderer();
if (renderer == null) {
// original
renderer = getHeader().getDefaultRenderer();
// modified
renderer = new DefaultTableCellRenderer() {
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
FilterHeader header = new FilterHeader( table, value, column);
return header;
}
};
}
Component c = renderer.getTableCellRendererComponent(header.getTable(), aColumn.getHeaderValue(), false, false,
-1, columnIndex);
c.setBackground(UIManager.getColor("control"));
rendererPane.paintComponent(g, c, header, cellRect.x, cellRect.y, cellRect.width, cellRect.height, true);
}
private void paintCell(Graphics g, Rectangle cellRect, ColumnGroup cGroup) {
TableCellRenderer renderer = cGroup.getHeaderRenderer();
if (renderer == null) {
renderer = getHeader().getDefaultRenderer();
}
Component component = renderer.getTableCellRendererComponent(header.getTable(), cGroup.getHeaderValue(), false,
false, -1, -1);
rendererPane
.paintComponent(g, component, header, cellRect.x, cellRect.y, cellRect.width, cellRect.height, true);
}
private int getHeaderHeight() {
int headerHeight = 0;
TableColumnModel columnModel = header.getColumnModel();
for (int column = 0; column < columnModel.getColumnCount(); column++) {
TableColumn aColumn = columnModel.getColumn(column);
TableCellRenderer renderer = aColumn.getHeaderRenderer();
if (renderer == null) {
renderer = getHeader().getDefaultRenderer();
}
Component comp = renderer.getTableCellRendererComponent(header.getTable(), aColumn.getHeaderValue(), false,
false, -1, column);
int cHeight = comp.getPreferredSize().height;
List<ColumnGroup> groups = getHeader().getColumnGroups(aColumn);
for (ColumnGroup group : groups) {
cHeight += group.getSize(header.getTable()).height;
}
headerHeight = Math.max(headerHeight, cHeight);
}
return headerHeight;
}
@Override
public Dimension getPreferredSize(JComponent c) {
int width = 0;
for (Enumeration<TableColumn> enumeration = header.getColumnModel().getColumns(); enumeration.hasMoreElements();) {
TableColumn aColumn = enumeration.nextElement();
width += aColumn.getPreferredWidth();
}
return createHeaderSize(width);
}
private Dimension createHeaderSize(int width) {
TableColumnModel columnModel = header.getColumnModel();
width += columnModel.getColumnMargin() * columnModel.getColumnCount();
if (width > Integer.MAX_VALUE) {
width = Integer.MAX_VALUE;
}
return new Dimension(width, getHeaderHeight());
}
}
GroupableHeaderExample.java
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.RowSorter;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;
// original from
public class GroupableHeaderExample extends JFrame {
GroupableHeaderExample() {
super( "Groupable Header Example" );
DefaultTableModel dm = new DefaultTableModel();
dm.setDataVector(new Object[][]{
{"1","a","b","c","d","e"},
{"2","f","g","h","i","j"},
{"3","k","l","m","n","o"},
{"4","p","q","r","s","t"}
},
new Object[]{"SNo.","1","2","Native","2","3"});
JTable table = new JTable( dm ) {
protected JTableHeader createDefaultTableHeader() {
return new GroupableTableHeader(columnModel);
}
};
TableColumnModel cm = table.getColumnModel();
ColumnGroup g_name = new ColumnGroup("Name");
g_name.add(cm.getColumn(1));
g_name.add(cm.getColumn(2));
ColumnGroup g_lang = new ColumnGroup("Language");
g_lang.add(cm.getColumn(3));
ColumnGroup g_other = new ColumnGroup("Others");
g_other.add(cm.getColumn(4));
g_other.add(cm.getColumn(5));
g_lang.add(g_other);
GroupableTableHeader header = (GroupableTableHeader)table.getTableHeader();
header.addColumnGroup(g_name);
header.addColumnGroup(g_lang);
JScrollPane scroll = new JScrollPane( table );
getContentPane().add( scroll );
setSize( 400, 120 );
// allow sorting
RowSorter<TableModel> sorter = new TableRowSorter<TableModel>(dm);
table.setRowSorter(sorter);
}
public static void main(String[] args) {
GroupableHeaderExample frame = new GroupableHeaderExample();
frame.setSize(1024,768);
frame.addWindowListener( new WindowAdapter() {
public void windowClosing( WindowEvent e ) {
System.exit(0);
}
});
frame.setVisible(true);
}
}
以及截图:
非常感谢您的帮助!
结合各种资源解决了这个问题。
一个来源是 this post on Whosebug,但该解决方案仅将过滤器放在 table 之外。
另一个来源是 open source version of a TableFilter on coderazzi。这非常棒,但也非常适合我的需要。并且不支持分组列。所以总而言之,我需要的是这段代码:
JViewport headerViewport = new JViewport() {
@Override
public void setView(Component view) {
if (view instanceof JTableHeader) {
filterHeader.add(view, BorderLayout.NORTH);
super.setView(filterHeader);
}
}
};
scroll.setColumnHeader(headerViewport);
和
private class TableFilterHeader extends JPanel {
public TableFilterHeader(JTableHeader th) {
setLayout(new BorderLayout());
add(new TableFilterRow(th.getTable()), BorderLayout.SOUTH);
}
}
截图:
感兴趣的可以获取full code from this gist。缺少的是过滤器本身,但这很简单:添加文档侦听器并应用过滤器。
问题
我想创建一个可分组的 table header,在 header.
下面有一个过滤行我想最直接的方法是将过滤器组件包含在 header 中。问题是组件不是 editable.
我进行了搜索,但没有找到好的或可行的方法。到目前为止,我找到的关于过滤器组件的最佳可行解决方案是将它们放在 table 之外。但是当你有一组 table 时,它看起来和感觉都很丑陋。它们必须低于 header。将过滤器组件放在页脚中也不是一个选项。
我使用了可分组的 table header 代码形式 this thread 并添加了一个过滤器组件。
现在的问题是,当我点击组件时,我无法访问它们。而是触发行排序。即使向文本字段添加鼠标侦听器也无济于事。
问题
有谁知道如何在 table header editable 中制作文本字段?或者有人有更好的方法将 table 过滤器放在 table header 下方吗?
代码
目前的代码:
FilterHeader.java
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.border.EmptyBorder;
public class FilterHeader extends JPanel {
public FilterHeader( JTable table, Object value, int columnIndex) {
setLayout( new BorderLayout());
// header
JLabel header = new JLabel();
header.setForeground(table.getTableHeader().getForeground());
header.setBackground(table.getTableHeader().getBackground());
header.setFont(table.getTableHeader().getFont());
header.setHorizontalAlignment(JLabel.CENTER);
header.setText(value.toString());
header.setBorder(UIManager.getBorder("TableHeader.cellBorder"));
add( header, BorderLayout.CENTER);
// append filter components to header
if( columnIndex == 3) {
JComboBox cb = new JComboBox();
cb.setBackground(Color.yellow);
cb.setBorder(UIManager.getBorder("TableHeader.cellBorder"));
cb.setBorder(new EmptyBorder(0, 0, 0, 0));
cb.setForeground(table.getTableHeader().getForeground());
cb.setPreferredSize(new Dimension(0,table.getRowHeight() + 4));
add( cb, BorderLayout.SOUTH);
} else {
JTextField tf = new JTextField( "enter filtertext");
tf.setBackground(Color.yellow);
tf.setBorder(UIManager.getBorder("TableHeader.cellBorder"));
tf.setForeground(table.getTableHeader().getForeground());
tf.setHorizontalAlignment(JLabel.CENTER);
add( tf, BorderLayout.SOUTH);
tf.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
System.out.println("textfield clicked"); // doesn't work
}
});
}
}
}
ColumnGroup.java
import java.awt.Component;
import java.awt.Dimension;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
public class ColumnGroup {
protected TableCellRenderer renderer;
protected List<TableColumn> columns;
protected List<ColumnGroup> groups;
protected String text;
protected int margin = 0;
public ColumnGroup(String text) {
this(text, null);
}
public ColumnGroup(String text, TableCellRenderer renderer) {
this.text = text;
this.renderer = renderer;
this.columns = new ArrayList<TableColumn>();
this.groups = new ArrayList<ColumnGroup>();
}
public void add(TableColumn column) {
columns.add(column);
}
public void add(ColumnGroup group) {
groups.add(group);
}
/**
* @param column
* TableColumn
*/
public List<ColumnGroup> getColumnGroups(TableColumn column) {
if (!contains(column)) {
return Collections.emptyList();
}
List<ColumnGroup> result = new ArrayList<ColumnGroup>();
result.add(this);
if (columns.contains(column)) {
return result;
}
for (ColumnGroup columnGroup : groups) {
result.addAll(columnGroup.getColumnGroups(column));
}
return result;
}
private boolean contains(TableColumn column) {
if (columns.contains(column)) {
return true;
}
for (ColumnGroup group : groups) {
if (group.contains(column)) {
return true;
}
}
return false;
}
public TableCellRenderer getHeaderRenderer() {
return renderer;
}
public void setHeaderRenderer(TableCellRenderer renderer) {
this.renderer = renderer;
}
public String getHeaderValue() {
return text;
}
public Dimension getSize(JTable table) {
TableCellRenderer renderer = this.renderer;
if (renderer == null) {
renderer = table.getTableHeader().getDefaultRenderer();
}
Component comp = renderer.getTableCellRendererComponent(table, getHeaderValue() == null || getHeaderValue().trim().isEmpty() ? " "
: getHeaderValue(), false, false, -1, -1);
int height = comp.getPreferredSize().height;
int width = 0;
for (ColumnGroup columnGroup : groups) {
width += columnGroup.getSize(table).width;
}
for (TableColumn tableColumn : columns) {
width += tableColumn.getWidth();
width += margin;
}
return new Dimension(width, height);
}
public void setColumnMargin(int margin) {
this.margin = margin;
for (ColumnGroup columnGroup : groups) {
columnGroup.setColumnMargin(margin);
}
}
}
GroupableTableHeader.java
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
@SuppressWarnings("serial")
public class GroupableTableHeader extends JTableHeader {
@SuppressWarnings("unused")
private static final String uiClassID = "GroupableTableHeaderUI";
protected List<ColumnGroup> columnGroups = new ArrayList<ColumnGroup>();
public GroupableTableHeader(TableColumnModel model) {
super(model);
setUI(new GroupableTableHeaderUI());
setReorderingAllowed(false);
// setDefaultRenderer(new MultiLineHeaderRenderer());
}
@Override
public void updateUI() {
setUI(new GroupableTableHeaderUI());
}
@Override
public void setReorderingAllowed(boolean b) {
super.setReorderingAllowed(false);
}
public void addColumnGroup(ColumnGroup g) {
columnGroups.add(g);
}
public List<ColumnGroup> getColumnGroups(TableColumn col) {
for (ColumnGroup group : columnGroups) {
List<ColumnGroup> groups = group.getColumnGroups(col);
if (!groups.isEmpty()) {
return groups;
}
}
return Collections.emptyList();
}
public void setColumnMargin() {
int columnMargin = getColumnModel().getColumnMargin();
for (ColumnGroup group : columnGroups) {
group.setColumnMargin(columnMargin);
}
}
}
GroupableTableHeaderUI.java
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.swing.JComponent;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.plaf.basic.BasicTableHeaderUI;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class GroupableTableHeaderUI extends BasicTableHeaderUI {
protected GroupableTableHeader getHeader() {
return (GroupableTableHeader) header;
}
@Override
public void paint(Graphics g, JComponent c) {
Rectangle clipBounds = g.getClipBounds();
if (header.getColumnModel().getColumnCount() == 0) {
return;
}
int column = 0;
Dimension size = header.getSize();
Rectangle cellRect = new Rectangle(0, 0, size.width, size.height);
Map<ColumnGroup, Rectangle> groupSizeMap = new HashMap<ColumnGroup, Rectangle>();
for (Enumeration<TableColumn> enumeration = header.getColumnModel().getColumns(); enumeration.hasMoreElements();) {
cellRect.height = size.height;
cellRect.y = 0;
TableColumn aColumn = enumeration.nextElement();
List<ColumnGroup> groups = getHeader().getColumnGroups(aColumn);
int groupHeight = 0;
for (ColumnGroup group : groups) {
Rectangle groupRect = groupSizeMap.get(group);
if (groupRect == null) {
groupRect = new Rectangle(cellRect);
Dimension d = group.getSize(header.getTable());
groupRect.width = d.width;
groupRect.height = d.height;
groupSizeMap.put(group, groupRect);
}
paintCell(g, groupRect, group);
groupHeight += groupRect.height;
cellRect.height = size.height - groupHeight;
cellRect.y = groupHeight;
}
cellRect.width = aColumn.getWidth();
if (cellRect.intersects(clipBounds)) {
paintCell(g, cellRect, column);
}
cellRect.x += cellRect.width;
column++;
}
}
private void paintCell(Graphics g, Rectangle cellRect, int columnIndex) {
TableColumn aColumn = header.getColumnModel().getColumn(columnIndex);
TableCellRenderer renderer = aColumn.getHeaderRenderer();
if (renderer == null) {
// original
renderer = getHeader().getDefaultRenderer();
// modified
renderer = new DefaultTableCellRenderer() {
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
FilterHeader header = new FilterHeader( table, value, column);
return header;
}
};
}
Component c = renderer.getTableCellRendererComponent(header.getTable(), aColumn.getHeaderValue(), false, false,
-1, columnIndex);
c.setBackground(UIManager.getColor("control"));
rendererPane.paintComponent(g, c, header, cellRect.x, cellRect.y, cellRect.width, cellRect.height, true);
}
private void paintCell(Graphics g, Rectangle cellRect, ColumnGroup cGroup) {
TableCellRenderer renderer = cGroup.getHeaderRenderer();
if (renderer == null) {
renderer = getHeader().getDefaultRenderer();
}
Component component = renderer.getTableCellRendererComponent(header.getTable(), cGroup.getHeaderValue(), false,
false, -1, -1);
rendererPane
.paintComponent(g, component, header, cellRect.x, cellRect.y, cellRect.width, cellRect.height, true);
}
private int getHeaderHeight() {
int headerHeight = 0;
TableColumnModel columnModel = header.getColumnModel();
for (int column = 0; column < columnModel.getColumnCount(); column++) {
TableColumn aColumn = columnModel.getColumn(column);
TableCellRenderer renderer = aColumn.getHeaderRenderer();
if (renderer == null) {
renderer = getHeader().getDefaultRenderer();
}
Component comp = renderer.getTableCellRendererComponent(header.getTable(), aColumn.getHeaderValue(), false,
false, -1, column);
int cHeight = comp.getPreferredSize().height;
List<ColumnGroup> groups = getHeader().getColumnGroups(aColumn);
for (ColumnGroup group : groups) {
cHeight += group.getSize(header.getTable()).height;
}
headerHeight = Math.max(headerHeight, cHeight);
}
return headerHeight;
}
@Override
public Dimension getPreferredSize(JComponent c) {
int width = 0;
for (Enumeration<TableColumn> enumeration = header.getColumnModel().getColumns(); enumeration.hasMoreElements();) {
TableColumn aColumn = enumeration.nextElement();
width += aColumn.getPreferredWidth();
}
return createHeaderSize(width);
}
private Dimension createHeaderSize(int width) {
TableColumnModel columnModel = header.getColumnModel();
width += columnModel.getColumnMargin() * columnModel.getColumnCount();
if (width > Integer.MAX_VALUE) {
width = Integer.MAX_VALUE;
}
return new Dimension(width, getHeaderHeight());
}
}
GroupableHeaderExample.java
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.RowSorter;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;
// original from
public class GroupableHeaderExample extends JFrame {
GroupableHeaderExample() {
super( "Groupable Header Example" );
DefaultTableModel dm = new DefaultTableModel();
dm.setDataVector(new Object[][]{
{"1","a","b","c","d","e"},
{"2","f","g","h","i","j"},
{"3","k","l","m","n","o"},
{"4","p","q","r","s","t"}
},
new Object[]{"SNo.","1","2","Native","2","3"});
JTable table = new JTable( dm ) {
protected JTableHeader createDefaultTableHeader() {
return new GroupableTableHeader(columnModel);
}
};
TableColumnModel cm = table.getColumnModel();
ColumnGroup g_name = new ColumnGroup("Name");
g_name.add(cm.getColumn(1));
g_name.add(cm.getColumn(2));
ColumnGroup g_lang = new ColumnGroup("Language");
g_lang.add(cm.getColumn(3));
ColumnGroup g_other = new ColumnGroup("Others");
g_other.add(cm.getColumn(4));
g_other.add(cm.getColumn(5));
g_lang.add(g_other);
GroupableTableHeader header = (GroupableTableHeader)table.getTableHeader();
header.addColumnGroup(g_name);
header.addColumnGroup(g_lang);
JScrollPane scroll = new JScrollPane( table );
getContentPane().add( scroll );
setSize( 400, 120 );
// allow sorting
RowSorter<TableModel> sorter = new TableRowSorter<TableModel>(dm);
table.setRowSorter(sorter);
}
public static void main(String[] args) {
GroupableHeaderExample frame = new GroupableHeaderExample();
frame.setSize(1024,768);
frame.addWindowListener( new WindowAdapter() {
public void windowClosing( WindowEvent e ) {
System.exit(0);
}
});
frame.setVisible(true);
}
}
以及截图:
非常感谢您的帮助!
结合各种资源解决了这个问题。
一个来源是 this post on Whosebug,但该解决方案仅将过滤器放在 table 之外。
另一个来源是 open source version of a TableFilter on coderazzi。这非常棒,但也非常适合我的需要。并且不支持分组列。所以总而言之,我需要的是这段代码:
JViewport headerViewport = new JViewport() {
@Override
public void setView(Component view) {
if (view instanceof JTableHeader) {
filterHeader.add(view, BorderLayout.NORTH);
super.setView(filterHeader);
}
}
};
scroll.setColumnHeader(headerViewport);
和
private class TableFilterHeader extends JPanel {
public TableFilterHeader(JTableHeader th) {
setLayout(new BorderLayout());
add(new TableFilterRow(th.getTable()), BorderLayout.SOUTH);
}
}
截图:
感兴趣的可以获取full code from this gist。缺少的是过滤器本身,但这很简单:添加文档侦听器并应用过滤器。