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tips4java · web-flow · commit 5902d770be47 · 2023-08-26T13:42:17.000-04:00
diff --git a/source/ComboBoxTableEditorDemo.java b/source/ComboBoxTableEditorDemo.java
@@ -0,0 +1,88 @@
+import java.awt.*;
+import java.awt.event.*;
+import java.io.*;
+import java.util.ArrayList;
+import java.util.Vector;
+import javax.swing.*;
+import javax.swing.event.*;
+import javax.swing.table.*;
+
+public class ComboBoxTableEditorDemo
+{
+    public static void main(String[] args)
+    {
+        SwingUtilities.invokeLater(new Runnable() {
+            public void run() {
+                createAndShowGUI();
+            }
+        });
+    }
+
+    public static void createAndShowGUI()
+    {
+		//  Build a table with data
+
+		Object[][] data =
+		{
+			{"Color", "Red"},
+			{"Fruit", "Banana"},
+			{"Shape", "Square"},
+		};
+		String[] columnNames = {"Type","Value"};
+
+		JTable table = new JTable(data, columnNames);
+		table.setRowHeight(table.getRowHeight() + 6);
+		table.setPreferredScrollableViewportSize(table.getPreferredSize());
+		JScrollPane scrollPane = new JScrollPane( table );
+
+		//  Editor for first column
+
+		String[] items = { "Color", "Fruit", "Shape" };
+		DefaultCellEditor dce = new DefaultCellEditor(new JComboBox<String>(items));
+		table.getColumnModel().getColumn(0).setCellEditor(dce);
+
+		//  Editor with multiple models for second column
+
+		JComboBox<String> comboBox = new JComboBox<>();
+		comboBox.setRenderer( new PromptComboBoxRenderer("Select Value") );
+		ComboBoxTableEditor editor = new ComboBoxTableEditor(comboBox, 0);
+		table.getColumnModel().getColumn(1).setCellEditor( editor );
+
+		String[] items1 = { "Red", "Blue", "Green" };
+		editor.addModel("Color", items1);
+
+		String[] items2 = { "Circle", "Square", "Triangle" };
+		editor.addModel("Shape", items2);
+
+		String[] items3 = { "Apple", "Orange", "Banana" };
+		editor.addModel("Fruit", items3);
+
+		//  Reset second column when first column changes
+		//  (replaces TableModelListener)
+
+		Action action = new AbstractAction()
+		{
+			public void actionPerformed(ActionEvent e)
+			{
+				TableCellListener tcl = (TableCellListener)e.getSource();
+   				int column = tcl.getColumn();
+
+				if (column == 0)
+				{
+					int row = tcl.getRow();
+					TableModel model = tcl.getTable().getModel();
+	   				model.setValueAt(null, row, 1);
+				}
+	   		}
+		};
+
+		TableCellListener tcl = new TableCellListener(table, action);
+
+		JFrame frame = new JFrame("Combo Box Table Editor");
+		frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
+		frame.add( scrollPane );
+		frame.setSize(300, 200);
+		frame.setLocationRelativeTo( null );
+		frame.setVisible(true);
+    }
+}
