我试图在Scala Swing应用程序的第二列中为每个单元格添加ComboBox作为列单元格编辑器,并且很难做到。以下代码显示了我到目前为止所尝试的内容,请帮助我更改代码以完成任务。
REFLECTABLE
更新
刚发现similair问题:How to embed a (working) Button in a Swing Table in Scala?会尝试建议的方法。
答案 0 :(得分:1)
感谢Nickal提示。我自己的解决方案是原始代码的修改版本,仅在此处发布更改。
修改导入块:
import scala.swing._
import scala.swing.Swing._
import javax.swing._
import javax.swing.table.{TableCellEditor, AbstractTableModel}
import java.awt.{Component => AWTComponent}
添加了两个特性,可以在新类中混合使用java类:
//////////////////////////////////////////////////////////////////////////////////////////////////
trait AbstractCellEditorTrait extends AbstractCellEditor
//////////////////////////////////////////////////////////////////////////////////////////////////
trait TableCellEditorTrait extends TableCellEditor
//////////////////////////////////////////////////////////////////////////////////////////////////
class comboboxEditor(val currentValue: AnyRef) extends AbstractCellEditorTrait with TableCellEditorTrait {
private val cb = new ComboBox(Array("Value1", "Value2", "Value3"))
cb.selection.item = currentValue.toString
def getCellEditorValue: AnyRef = cb.selection.item.asInstanceOf[AnyRef]
def getTableCellEditorComponent(tab: JTable, value: AnyRef, isSelected: Boolean, row: Int, col: Int): AWTComponent = {
cb.peer.asInstanceOf[AWTComponent]
}
}
修改后的代码在TestTable
类中设置单元格编辑器(以val Col1 = peer.g
开头的3行代码替换为下面的代码):
override def editor(row: Int, col: Int): TableCellEditor = {
if (col == 1)
new comboboxEditor(mymodel.getValueAt(row, col))
else
super.editor(row, col)
}
答案 1 :(得分:0)
基于 e_z 的代码,我为公共代码分离了一个BaseEditor
抽象类,因为最终我还需要实现isCellEditable
。在BaseEditor
的子类中,您需要一个editor
的实例,它是您的组件并实现getCellEditorValue
。
abstract class BaseEditor extends AbstractCellEditor with TableCellEditor {
protected val editor: Component // scala.swing.Component
override def isCellEditable(e: EventObject): Boolean= {
if (super.isCellEditable(e)) {
e match {
case me: java.awt.event.MouseEvent => me.getClickCount >= 2
case ke: java.awt.event.KeyEvent =>
// F2 not working, for some reason keypress arrives as ActionEvent
ke.getKeyCode == java.awt.event.KeyEvent.VK_F2
case ae: java.awt.event.ActionEvent => false // ignore for now
case x => false // otherwise ignore
}
} else false
}
def getTableCellEditorComponent(table: JTable, value: AnyRef,
selected: Boolean, row: Int, col: Int): AWTComponent= {
editor.peer.asInstanceOf[AWTComponent]
}
}
// example extending BaseEditor and custom StringData object
case class StringData(s: String)
class TextFieldEditor(current: StringData) extends BaseEditor {
protected val editor= new TextField(current.s)
def getCellEditorValue: AnyRef= StringData(editor.text)
}