我用的是自定义的TableCellRenderer
与多个JFormattedTextField
在表格单元格中。我使用相同的组件TableCellEditor
。现在我需要知道在什么方面JFormattedTextField
用户单击,以及该字段中的位置(可以使用viewToModel
).
使用自定义时TableCellEditor
,唯一获得的方法是Point
鼠标点击是isCellEditable(EventObject e) http://docs.oracle.com/javase/7/docs/api/javax/swing/CellEditor.html#isCellEditable%28java.util.EventObject%29中的方法CellEditor
. The Point
给出的是在父母坐标系中。
anEvent 位于调用组件坐标系中。
但是如何获取点击坐标处的组件呢?我尝试过findComponentAt(Point p) http://docs.oracle.com/javase/7/docs/api/java/awt/Container.html#findComponentAt%28java.awt.Point%29但它返回null
for me.
这是我测试过的一些代码:
@Override
public boolean isCellEditable(EventObject e) {
if(e instanceof MouseEvent) {
MouseEvent ev = (MouseEvent)e;
Point p = ev.getPoint();
// gives strange values
Point p3 = editor.getLocation();
// x: 0 y: 0
Point tp = ((JTable)e.getSource()).getLocation();
// these returns null
Component c1 = renderer.findComponentAt(p);
Component c2 = editor.findComponentAt(p);
System.out.println("Click at " + p + " editor at: " + p3);
}
return true;
}
组件位置的值editor.getLocation();
给出 y 坐标的几乎随机值(例如,当在表中使用 5 行时)。
如何获取用户在使用时单击的组件TableCellEditor
and a TableCellRenderer
?
这是一个完整的示例:
public class FormattedTableEditDemo extends JFrame {
public FormattedTableEditDemo() {
MyTableModel model = new MyTableModel();
MyTableCellEditorAndRenderer cellEditorAndRenderer =
new MyTableCellEditorAndRenderer();
JTable table = new JTable(model);
table.setDefaultRenderer(BigDecimal.class, cellEditorAndRenderer);
table.setDefaultEditor(BigDecimal.class, cellEditorAndRenderer);
table.setRowHeight(40);
add(new JScrollPane(table));
pack();
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
}
class MyTableCellEditorAndRenderer extends AbstractCellEditor
implements TableCellEditor, TableCellRenderer {
MyCellPanel editor = new MyCellPanel();
MyCellPanel renderer = new MyCellPanel();
@Override
public Object getCellEditorValue() {
return editor.getValue();
}
@Override
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus,
int row, int column) {
renderer.setValue(value);
return renderer;
}
@Override
public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column) {
editor.setValue(value);
return editor;
}
@Override
public boolean shouldSelectCell(EventObject e) {
return false;
}
@Override
public boolean isCellEditable(EventObject e) {
if(e instanceof MouseEvent) {
MouseEvent ev = (MouseEvent)e;
Point p = ev.getPoint();
// gives strange values
Point p3 = editor.getLocation();
// x: 0 y: 0
Point tp = ((JTable)e.getSource()).getLocation();
// these returns null
Component c1 = renderer.findComponentAt(p);
Component c2 = editor.findComponentAt(p);
System.out.println("Click at " + p + " editor at: " + p3);
}
return true;
}
}
class MyCellPanel extends JPanel {
JFormattedTextField field1 = new JFormattedTextField();
JFormattedTextField field2 = new JFormattedTextField();
public MyCellPanel() {
field1.setColumns(8);
field2.setColumns(8);
field2.setValue(new BigDecimal("0.00"));
setLayout(new BorderLayout());
add(field1, BorderLayout.WEST);
add(Box.createHorizontalStrut(30));
add(field2, BorderLayout.EAST);
}
public Object getValue() {
return field1.getValue();
}
public void setValue(Object value) {
field1.setValue(value);
}
}
class MyTableModel extends AbstractTableModel {
List<BigDecimal> values = new ArrayList<BigDecimal>();
public MyTableModel() {
// test values
values.add(new BigDecimal("37.00"));
values.add(new BigDecimal("4305.90"));
values.add(new BigDecimal("386.04"));
values.add(new BigDecimal("3486.58"));
values.add(new BigDecimal("6546.45"));
}
@Override
public int getColumnCount() {
return 1;
}
@Override
public int getRowCount() {
return values.size();
}
@Override
public Object getValueAt(int row, int column) {
return values.get(row);
}
@Override
public boolean isCellEditable(int row, int column) {
return true;
}
@Override
public Class<?> getColumnClass(int column) {
return BigDecimal.class;
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new FormattedTableEditDemo();
}
});
}
}