[英]How can i create two Jtables which have same Columnmodel, but they have different models
我设计了两个具有相同columnmodel的jtable,因此它们会相应地调整大小,这两个jtable应该具有相同的列号,当我们调整列大小或更改滚动条时,我希望它们以相同的方式表现。 现在我有一个问题,当我调整第二个表的大小时,行上的列不会更改其大小,并且滚动条也不会相应地表现。
我的代码就是这样
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.event.ChangeEvent;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
import javax.swing.JScrollPane;
public class CompFilteredTable extends JPanel{
private JTable tblFilter;
private JTable tblData;
private JScrollPane scrollPane;
private JScrollPane scrollPane_1;
public CompFilteredTable() {
setLayout(new BorderLayout(0, 0));
add(getScrollPane_1(), BorderLayout.NORTH);
add(getScrollPane(), BorderLayout.CENTER);
}
public JTable getTblFilter() {
if (tblFilter == null) {
tblFilter = new MyTable(new TestTableModel2());
tblFilter.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
tblFilter.setTableHeader (null);
}
return tblFilter;
}
public JTable getTblData() {
if (tblData == null) {
tblData = new MyTable(new TestTableModel());
tblData.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
tblFilter.setColumnModel(tblData.getColumnModel());
}
return tblData;
}
private class MyTable extends JTable {
private MyTable (final TableModel model) {
super (model);
}
private boolean isColumnMarginChangeInProgress=false;
@Override
public void columnMarginChanged(final ChangeEvent e) {
if (isColumnMarginChangeInProgress) {
return;
}
isColumnMarginChangeInProgress = true;
if (isEditing()) {
removeEditor();
}
TableColumn resizingColumn = null;
if (tableHeader != null) {
resizingColumn = tableHeader.getResizingColumn();
}
if (resizingColumn != null) {
if (autoResizeMode == AUTO_RESIZE_OFF) {
resizingColumn.setPreferredWidth(resizingColumn.getWidth());
} else { // this else block is missing in jdk1.4 as compared to 1.3
doLayout();
repaint();
}
} else {
resizeAndRepaint();
}
isColumnMarginChangeInProgress = false;
}
}
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setPreferredSize(new Dimension(600, 400));
CompFilteredTable compFilteredTable = new CompFilteredTable();
frame.getContentPane().add(compFilteredTable);
frame.pack();
frame.setVisible(true);
}
private class TestTableModel extends DefaultTableModel {
@Override
public int getRowCount () {
return 10;
}
@Override
public int getColumnCount () {
return 10;
}
@Override
public String getColumnName (final int column) {
return "Col-"+column;
}
@Override
public Object getValueAt (final int row, final int column) {
return (row * column) + "";
}
}
private class TestTableModel2 extends DefaultTableModel {
@Override
public int getRowCount () {
return 1;
}
@Override
public int getColumnCount () {
return 10;
}
@Override
public String getColumnName (final int column) {
return "Col-"+column;
}
@Override
public Object getValueAt (final int row, final int column) {
return (row * column) + "";
}
}
private JScrollPane getScrollPane() {
if (scrollPane == null) {
scrollPane = new JScrollPane();
scrollPane.setViewportView(getTblData());
}
return scrollPane;
}
private JScrollPane getScrollPane_1() {
if (scrollPane_1 == null) {
scrollPane_1 = new JScrollPane();
scrollPane_1.setViewportView(getTblFilter());
}
return scrollPane_1;
}
}
贡献Deepak之后更新了代码 (我不知道如何显示我的更新,因此在下面添加了)
我更新了代码,现在在图片上看到了两个问题。 第二个表的标题不可见,并且表之间有很大的差距。
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.event.ChangeEvent;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
import javax.swing.JScrollPane;
import java.awt.GridLayout;
public class CompFilteredTable extends JPanel{
private JTable tblFilter;
private JTable tblData;
private JScrollPane scrollPane;
private JPanel panel;
public CompFilteredTable() {
setLayout(new BorderLayout(0, 0));
add(getScrollPane(), BorderLayout.CENTER);
}
public JTable getTblFilter() {
if (tblFilter == null) {
tblFilter = new MyTable(new TestTableModel2());
tblFilter.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
tblFilter.setTableHeader (null);
}
return tblFilter;
}
public JTable getTblData() {
if (tblData == null) {
tblData = new MyTable(new TestTableModel());
tblData.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
tblFilter.setColumnModel(tblData.getColumnModel());
}
return tblData;
}
private class MyTable extends JTable {
private MyTable (final TableModel model) {
super (model);
}
private boolean isColumnMarginChangeInProgress=false;
@Override
public void columnMarginChanged(final ChangeEvent e) {
if (isColumnMarginChangeInProgress) {
return;
}
isColumnMarginChangeInProgress = true;
if (isEditing()) {
removeEditor();
}
TableColumn resizingColumn = null;
if (tableHeader != null) {
resizingColumn = tableHeader.getResizingColumn();
}
if (resizingColumn != null) {
if (autoResizeMode == AUTO_RESIZE_OFF) {
resizingColumn.setPreferredWidth(resizingColumn.getWidth());
} else { // this else block is missing in jdk1.4 as compared to 1.3
doLayout();
}
repaint();
} else {
resizeAndRepaint();
}
isColumnMarginChangeInProgress = false;
}
}
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setPreferredSize(new Dimension(600, 400));
CompFilteredTable compFilteredTable = new CompFilteredTable();
frame.getContentPane().add(compFilteredTable);
frame.pack();
frame.setVisible(true);
}
private class TestTableModel extends DefaultTableModel {
@Override
public int getRowCount () {
return 10;
}
@Override
public int getColumnCount () {
return 10;
}
@Override
public String getColumnName (final int column) {
return "Col-"+column;
}
@Override
public Object getValueAt (final int row, final int column) {
return (row * column) + "";
}
}
private class TestTableModel2 extends DefaultTableModel {
@Override
public int getRowCount () {
return 1;
}
@Override
public int getColumnCount () {
return 10;
}
@Override
public String getColumnName (final int column) {
return "Col-"+column;
}
@Override
public Object getValueAt (final int row, final int column) {
return (row * column) + "";
}
}
private JScrollPane getScrollPane() {
if (scrollPane == null) {
scrollPane = new JScrollPane();
scrollPane.setViewportView(getPanel());
}
return scrollPane;
}
private JPanel getPanel() {
if (panel == null) {
panel = new JPanel();
panel.setLayout(new GridLayout(2, 1, 0, 0));
panel.add(getTblFilter());
panel.add(getTblData());
}
return panel;
}
}
输出画面
使用columnMarginChanged
事件上的setPreferredWidth
方法设置TableColumn
的首选宽度将更新JTableHeader
组件。 因此,表头的大小正在按观察到的方式调整。 设置所需的属性后,显式调用repaint()
也会触发将更改应用于表的每个组件。
因此,这里是进行此更改以使其达到预期效果所需的更改。
if (autoResizeMode == AUTO_RESIZE_OFF) {
resizingColumn.setPreferredWidth(resizingColumn.getWidth());
repaint();
} else { // this else block is missing in jdk1.4 as compared to 1.3
同样, repaint()
也可以移出条件块。
问题1:看不到第二个表的标题。
原因:如表中的代码所示,表头被设置为null
。
public JTable getTblFilter() {
if (tblFilter == null) {
tblFilter = new MyTable(new TestTableModel2());
tblFilter.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
tblFilter.setTableHeader (null);
}
return tblFilter;
}
解决方案是不要将表头设置为null。 删除部分代码tblFilter.setTableHeader (null);
应该管用。
问题2:表格之间的差距很大。
有各种可用的LayoutManager,可用于根据需要设计UI。 在这里使用带有2行1列的GridLayout应该会有所帮助。
public CompFilteredTable() {
setLayout(new GridLayout(2, 1));
add(getScrollPane_1());
add(getScrollPane());
}
可以将单个JTable添加到单个JScrollPane中,以解决表头未在UI中显示的问题。
要管理表之间的间隙,GridBagLayout会有所帮助。 GridBagLayout是最灵活的布局管理器类。GridBagLayout的对象使组件垂直,水平或沿其基线对齐, 而不需要相同大小的组件。
我解决了所有问题,表格之间有一些缝隙。 我想将此组件用作根据上表中的值过滤表的组件。 这个组件有什么改进吗? 也许可以将过滤功能添加到此组件中。
组件的输出屏幕:
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.event.ChangeEvent;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
import javax.swing.JScrollPane;
import javax.swing.ScrollPaneConstants;
public class CompFilteredTable extends JPanel{
private JTable tblFilter;
private JTable tblData;
private JScrollPane scrollPane;
private JPanel panel;
private JScrollPane scrollPane_1;
private JScrollPane scrollPane_2;
public CompFilteredTable() {
setLayout(new BorderLayout(0, 0));
add(getScrollPane(), BorderLayout.CENTER);
}
public JTable getTblFilter() {
if (tblFilter == null) {
tblFilter = new FilteredTable(new TestTableModel2());
tblFilter.setPreferredScrollableViewportSize(new Dimension(0, 0));
tblFilter.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
tblFilter.setTableHeader (null);
}
return tblFilter;
}
public JTable getTblData() {
if (tblData == null) {
tblData = new FilteredTable(new TestTableModel());
tblData.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
tblFilter.setColumnModel(tblData.getColumnModel());
}
return tblData;
}
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setPreferredSize(new Dimension(600, 400));
CompFilteredTable compFilteredTable = new CompFilteredTable();
frame.getContentPane().add(compFilteredTable);
frame.pack();
frame.setVisible(true);
}
private class TestTableModel extends DefaultTableModel {
@Override
public int getRowCount () {
return 10;
}
@Override
public int getColumnCount () {
return 10;
}
@Override
public String getColumnName (final int column) {
return "Col-"+column;
}
@Override
public Object getValueAt (final int row, final int column) {
return (row * column) + "";
}
}
private class TestTableModel2 extends DefaultTableModel {
@Override
public int getRowCount () {
return 1;
}
@Override
public int getColumnCount () {
return 10;
}
@Override
public String getColumnName (final int column) {
return "Col-"+column;
}
@Override
public Object getValueAt (final int row, final int column) {
return (row * column) + "";
}
}
private JScrollPane getScrollPane() {
if (scrollPane == null) {
scrollPane = new JScrollPane();
scrollPane.setViewportView(getPanel());
}
return scrollPane;
}
private JPanel getPanel() {
if (panel == null) {
panel = new JPanel();
panel.setLayout(new BorderLayout(0, 0));
panel.add(getScrollPane_2(), BorderLayout.NORTH);
panel.add(getScrollPane_1());
}
return panel;
}
private JScrollPane getScrollPane_1() {
if (scrollPane_1 == null) {
scrollPane_1 = new JScrollPane();
scrollPane_1.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
scrollPane_1.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scrollPane_1.setViewportView(getTblData());
Dimension d = tblData.getPreferredSize();
scrollPane_1.setPreferredSize(new Dimension(d.width,tblData.getRowHeight()*tblData.getRowCount()+1));
}
return scrollPane_1;
}
private JScrollPane getScrollPane_2() {
if (scrollPane_2 == null) {
scrollPane_2 = new JScrollPane();
scrollPane_2.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scrollPane_2.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
scrollPane_2.setViewportView(getTblFilter());
Dimension d = tblFilter.getPreferredSize();
scrollPane_2.setPreferredSize(new Dimension(d.width,tblFilter.getRowHeight()*tblFilter.getRowCount()+1));
}
return scrollPane_2;
}
}
class FilteredTable extends JTable {
FilteredTable (final TableModel model) {
super (model);
}
private boolean isColumnMarginChangeInProgress=false;
@Override
public void columnMarginChanged(final ChangeEvent e) {
if (isColumnMarginChangeInProgress) {
return;
}
isColumnMarginChangeInProgress = true;
if (isEditing()) {
removeEditor();
}
TableColumn resizingColumn = null;
if (tableHeader != null) {
resizingColumn = tableHeader.getResizingColumn();
}
if (resizingColumn != null) {
if (autoResizeMode == AUTO_RESIZE_OFF) {
resizingColumn.setPreferredWidth(resizingColumn.getWidth());
} else { // this else block is missing in jdk1.4 as compared to 1.3
doLayout();
}
repaint();
} else {
resizeAndRepaint();
}
isColumnMarginChangeInProgress = false;
}
}
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