我必须用 Swing 在 JAVA 中构建一个复杂的 GUI（目前我有近 80 个类）。应用程序的图形部分拆分如下：第一个选项卡系列（例如“管理”、“管理”、“配置”），然后是第二个级别（例如，“用户”、“组”、“游戏” ）。现在我有两个年级（每个级别的标签一个）。下一个级别是管理业务对象的 JPanel（我的整个 GUI 是围绕我的业务模型构建的），在这个级别有 2 种类型的 JPanel：谁管理简单对象（例如，“用户”、“类别”、“游戏” ”，“级别”）和管理对象的“复合主键”（例如“User_Game”，它代表所有用户的每个游戏级别的复式表的形式）。我的第二级选项卡可以包含多个 JPanel。当我的 JPanel 管理单个对象时，它由一个 JTable 和两个按钮（添加和删除）组成，我在上面放置事件，如果不是，它就是一个简单的 JTable。当我有外键（例如“用户”的“组”和“游戏”的“类别”或“用户游戏”的“级别”）时，它是一个直接从 JTableModel 获取其信息的 JComboBox。在管理 JTable 对象以“复合主键”时，列和行也直接依赖于模型（例如“Game”和“User”“User_Game”）。每个都有自己的 JTable 模型来处理持久层（用于信息的 Hibernate）和其他 TableModel。要管理更改（例如添加、修改或删除“用户”），我使用以下代码：
import java.awt.event.*;
import javax.swing.*;
import java.beans.*;
/*
* This class listens for changes made to the data in the table via the
* TableCellEditor. When editing is started, the value of the cell is saved
* When editing is stopped the new value is saved. When the oold and new
* values are different, then the provided Action is invoked.
*
* The source of the Action is a TableCellListener instance.
*/
public class TabCellListener implements PropertyChangeListener, Runnable
{
private JTable table;
private Action action;
private int row;
private int column;
private Object oldValue;
private Object newValue;
/**
* Create a TableCellListener.
*
* @param table the table to be monitored for data changes
* @param action the Action to invoke when cell data is changed
*/
public TabCellListener(JTable table, Action action)
{
this.table = table;
this.action = action;
this.table.addPropertyChangeListener( this );
this.table.getModel().addTableModelListener(new ModelListenerTableGui(this.table, this.action));
}
/**
* Create a TableCellListener with a copy of all the data relevant to
* the change of data for a given cell.
*
* @param row the row of the changed cell
* @param column the column of the changed cell
* @param oldValue the old data of the changed cell
* @param newValue the new data of the changed cell
*/
private CellListenerTableGui(JTable table, int row, int column, Object oldValue, Object newValue)
{
this.table = table;
this.row = row;
this.column = column;
this.oldValue = oldValue;
this.newValue = newValue;
}
/**
* Get the column that was last edited
*
* @return the column that was edited
*/
public int getColumn()
{
return column;
}
/**
* Get the new value in the cell
*
* @return the new value in the cell
*/
public Object getNewValue()
{
return newValue;
}
/**
* Get the old value of the cell
*
* @return the old value of the cell
*/
public Object getOldValue()
{
return oldValue;
}
/**
* Get the row that was last edited
*
* @return the row that was edited
*/
public int getRow()
{
return row;
}
/**
* Get the table of the cell that was changed
*
* @return the table of the cell that was changed
*/
public JTable getTable()
{
return table;
}
//
// Implement the PropertyChangeListener interface
//
@Override
public void propertyChange(PropertyChangeEvent e)
{
// A cell has started/stopped editing
if ("tableCellEditor".equals(e.getPropertyName()))
{
if (table.isEditing())
processEditingStarted();
else
processEditingStopped();
}
}
/*
* Save information of the cell about to be edited
*/
private void processEditingStarted()
{
// The invokeLater is necessary because the editing row and editing
// column of the table have not been set when the "tableCellEditor"
// PropertyChangeEvent is fired.
// This results in the "run" method being invoked
SwingUtilities.invokeLater( this );
}
/*
* See above.
*/
@Override
public void run()
{
row = table.convertRowIndexToModel( table.getEditingRow() );
column = table.convertColumnIndexToModel( table.getEditingColumn() );
oldValue = table.getModel().getValueAt(row, column);
newValue = null;
}
/*
* Update the Cell history when necessary
*/
private void processEditingStopped()
{
newValue = table.getModel().getValueAt(row, column);
// The data has changed, invoke the supplied Action
if ((newValue == null && oldValue != null) || (newValue != null && !newValue.equals(oldValue)))
{
// Make a copy of the data in case another cell starts editing
// while processing this change
CellListenerTableGui tcl = new CellListenerTableGui(
getTable(), getRow(), getColumn(), getOldValue(), getNewValue());
ActionEvent event = new ActionEvent(
tcl,
ActionEvent.ACTION_PERFORMED,
"");
action.actionPerformed(event);
}
}
}
以及以下动作：
import java.awt.event.ActionEvent;
import java.beans.PropertyChangeListener;
import javax.swing.Action;
public class UpdateTableListener<N> extends AbstractTableListener implements Action
{
protected boolean enabled;
public UpdateTableListener(AbstractTableGui<N> obs)
{
super(obs);
this.enabled = true;
}
@Override
public void actionPerformed(ActionEvent e)
{
if (null != e && e.getSource() instanceof CellListenerTableGui)
{
TabCellListener tcl = (TabCellListener)e.getSource();
this.obs.getModel().setValueAt(tcl.getNewValue(), tcl.getRow(), tcl.getColumn());
int sel = this.obs.getModel().getNextRequiredColumn(tcl.getRow());
if (sel == -1)
this.obs.getModel().save(tcl.getRow());
}
}
@Override
public void addPropertyChangeListener(PropertyChangeListener arg0)
{
}
@Override
public Object getValue(String arg0)
{
return null;
}
@Override
public boolean isEnabled()
{
return this.enabled;
}
@Override
public void putValue(String arg0, Object arg1)
{
}
@Override
public void removePropertyChangeListener(PropertyChangeListener arg0)
{
}
@Override
public void setEnabled(boolean arg0)
{
this.enabled = arg0;
}
}
此代码运行良好，数据保存良好。然后我添加这段代码来刷新依赖组件：
import java.awt.event.ActionEvent;
import java.beans.PropertyChangeListener;
import javax.swing.Action;
public class ChangeTableListener implements Action
{
protected AbstractTableGui table;
public ChangeTableListener(AbstractTableGui table)
{
this.table = table;
}
@Override
public void actionPerformed(ActionEvent arg0)
{
this.table.getModel().fireTableDataChanged();
this.table.repaint();
}
@Override
public void addPropertyChangeListener(PropertyChangeListener arg0)
{
}
@Override
public Object getValue(String arg0)
{
return null;
}
@Override
public boolean isEnabled()
{
return false;
}
@Override
public void putValue(String arg0, Object arg1)
{
}
@Override
public void removePropertyChangeListener(PropertyChangeListener arg0)
{
}
@Override
public void setEnabled(boolean arg0)
{
}
}
我的 TableModel.fireTableDataChanged 重建 JTable 内容（调用 super.fireTableDataChanged 和 fireTableStructureChanged），JTable.repaint 重置了渲染器，它适用于 Combobox（外键）并且它更新了复式表上的标题，但它不能添加或删除复式表中的列或行。此外，如果有最轻微的变化，我会看到更高的延迟。
我的问题很简单：你如何管理相互依赖的组件？
为了您的帮助，提前，谢谢。
编辑：这里是 TableCellEditor 的一个例子。
import javax.swing.DefaultCellEditor;
import javax.swing.JTextField;
public class TextColumnEditor extends DefaultCellEditor
{
public TextColumnEditor()
{
super(new JTextField());
}
public boolean stopCellEditing()
{
Object v = this.getCellEditorValue();
if(v == null || v.toString().length() == 0)
{
this.fireEditingCanceled();
return false;
}
return super.stopCellEditing();
}
}
TableModel 的一个例子：
import java.util.ArrayList;
public class GroupModelTable extends AbstractModelTable<Groups>
{
protected GroupsService service;
public GroupModelTable(AbstractTableGui<Groups> content)
{
super(content, new ArrayList<String>(), new ArrayList<Groups>());
this.headers.add("Group");
this.content.setModel(this);
this.service = new GroupsService();
this.setLines(this.service.search(new Groups()));
}
public Object getValueAt(int rowIndex, int columnIndex)
{
switch (columnIndex)
{
case 0:
return this.lines.get(rowIndex).getTitle();
default:
return "";
}
}
public void setValueAt(Object aVal, int rowIndex, int columnIndex)
{
switch (columnIndex)
{
case 0:
this.lines.get(rowIndex).setTitle(aVal.toString());
break;
default:
break;
}
}
@Override
public Groups getModel(int line, int column)
{
return null;
}
@Override
public Groups getModel(int line)
{
return this.lines.get(line);
}
public boolean isCellEditable(int row, int column)
{
return true;
}
@Override
public GroupModelTableGui newLine()
{
this.lines.add(new Groups());
return this;
}
@Override
public int getNextRequiredColumn(int row)
{
Groups g = this.getModel(row);
if (g != null && g.getTitle() != null && g.getTitle().length() > 0)
return -1;
return 0;
}
@Override
public void save(int row)
{
Groups g = this.getModel(row);
if (g != null)
{
try
{
if (g.getId() == null)
this.service.create(g);
else
this.service.update(g);
}
catch (Exception e)
{
}
}
}
@Override
public void removeRow(int row)
{
Groups g = this.getModel(row);
if (g != null)
{
try
{
if (g.getId() != null)
this.service.delete(g);
super.removeRow(row);
}
catch (Exception e)
{
}
}
}
}
表的一个例子：
public class GroupTable extends AbstractTable<Groups>
{
public GroupTable()
{
new GroupModelTableGui(this);
new CellListenerTableGui(this.getContent(), new UpdateTableListenerGui<Groups>(this));
this.getContent().getColumnModel().getColumn(0).setCellEditor(new TextColumnEditorGui());
}
}
我希望它能帮助你理解：/