Question

如果用户选择ComboBoxCellEditor项，我想让" "可编辑。我尝试使用两个CellEditor，一个是TextCellEditor，一个是ComboBoxCellEditor。如果用户选择" "项，CellEditor将切换为TextCellEditor。但它不起作用。因为comboIndex有一个ArrayOutOfBoundException。任何人都可以帮我修改我的代码吗？原始EditingSupport的代码如下所示：

import java.util.ArrayList;
import java.util.List;

import org.apache.log4j.Logger;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.ComboBoxCellEditor;
import org.eclipse.jface.viewers.EditingSupport;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TextCellEditor;

public class SecondColEdittingSupport extends EditingSupport {
    private final TableViewer viewer;
    private final CellEditor comboEditor;
    private final CellEditor textEditor;
    Logger logger = Logger.getLogger(this.getClass());
    public static String[] names ={ " ","SMALLINT ", "INTEGER", "BIGINT", 
    "DECIMAL", "NUMERIC", 
            "REAL", "TIMESTAMP", "VARCHAR", "CHAR", "TEXT"};

    public SecondColEdittingSupport(TableViewer viewer) {
        super(viewer);
        this.viewer = viewer;
        comboEditor = new ComboBoxCellEditor(viewer.getTable(), names);
        textEditor = new TextCellEditor(viewer.getTable());
    }

    private int getNameIndex(String name) {
        for (int i = 1; i < SecondColEdittingSupport.names.length; i++) {
            if (SecondColEdittingSupport.names[i].equals(name))
                return i;
        }
        return 0;
    }

    @Override
    protected CellEditor getCellEditor(Object element) {
        String[] str = (String[]) element;
        if (getNameIndex(str[1]) != 0) {
            return comboEditor;
        }
        return textEditor;
    }

    @Override
    protected boolean canEdit(Object element) {
        return true;
    }

    @Override
    protected Object getValue(Object element) {
        String[] str = (String[]) element;
        if (getNameIndex(str[1]) != 0) {
            return getNameIndex(str[1]);
        }
        return  str[1];
    }

    @Override
    protected void setValue(Object element, Object userInputValue) {
        String[] str = (String[]) element;
        if (getNameIndex(str[1]) != 0) {
            Integer comboIndex = (Integer) userInputValue;
            str[1] = SecondColEdittingSupport.names[comboIndex];
        } else {
            str[1] = String.valueOf(userInputValue);
        }
        viewer.update(element, null);
    }

}

堆栈跟踪如下所示：

java.lang.ArrayIndexOutOfBoundsException：-1 在com.highgo.admin.migrator.ui.SecondColEdittingSupport.setValue（SecondColEdittingSupport.java:77）在org.eclipse.jface.viewers.EditingSupport.saveCellEditorValue（EditingSupport.java:113）在org.eclipse.jface.viewers.ColumnViewerEditor.saveEditorValue（ColumnViewerEditor.java:433）在org.eclipse.jface.viewers.ColumnViewerEditor.applyEditorValue（ColumnViewerEditor.java:299）在org.eclipse.jface.viewers.ColumnViewerEditor.handleEditorActivationEvent（ColumnViewerEditor.java:416）在org.eclipse.jface.viewers.ColumnViewer.triggerEditorActivationEvent（ColumnViewer.java:677）在org.eclipse.jface.viewers.ColumnViewer.handleMouseDown（ColumnViewer.java:652）在org.eclipse.jface.viewers.ColumnViewer.access $ 0（ColumnViewer.java:648）在org.eclipse.jface.viewers.ColumnViewer $ 1.mouseDown（ColumnViewer.java:97） at org.eclipse.swt.widgets.TypedListener.handleEvent（TypedListener.java:193）在org.eclipse.swt.widgets.EventTable.sendEvent（EventTable.java:86）在org.eclipse.swt.widgets.Display.sendEvent（Display.java:4428）在org.eclipse.swt.widgets.Widget.sendEvent（Widget.java:1079）在org.eclipse.swt.widgets.Display.runDeferredEvents（Display.java:4238）在org.eclipse.swt.widgets.Display.readAndDispatch（Display.java:3817）在org.eclipse.jface.window.Window.runEventLoop（Window.java:818）在org.eclipse.jface.window.Window.open（Window.java:794）在com.highgo.admin.migrator.handler.OpenMigratorHandler.execute（OpenMigratorHandler.java:28）在com.highgo.admin.NavigatorActionExecuteAdvanceTool.executeTool（NavigatorActionExecuteAdvanceTool.java:46）在com.highgo.admin.NavigatorActionExecuteAdvanceTool.run（NavigatorActionExecuteAdvanceTool.java:37）在org.jkiss.dbeaver.ui.ActionUtils $ 1.run（ActionUtils.java:267）在org.eclipse.jface.action.Action.runWithEvent（Action.java:473） at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection（ActionContributionItem.java:565） at org.eclipse.jface.action.ActionContributionItem.lambda $ 4（ActionContributionItem.java:397） at org.eclipse.jface.action.ActionContributionItem $$ Lambda $ 148 / 1073564434.handleEvent（Unknown Source）在org.eclipse.swt.widgets.EventTable.sendEvent（EventTable.java:86）在org.eclipse.swt.widgets.Display.sendEvent（Display.java:4428）在org.eclipse.swt.widgets.Widget.sendEvent（Widget.java:1079）在org.eclipse.swt.widgets.Display.runDeferredEvents（Display.java:4238）在org.eclipse.swt.widgets.Display.readAndDispatch（Display.java:3817） at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine $ 5.run（PartRenderingEngine.java:1155）在org.eclipse.core.databinding.observable.Realm.runWithDefault（Realm.java:336）在org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run（PartRenderingEngine.java:1044）在org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI（E4Workbench.java:153）在org.eclipse.ui.internal.Workbench.lambda $ 3（Workbench.java:680）在org.eclipse.ui.internal.Workbench $$ Lambda $ 14 / 1717433286.run（未知来源）在org.eclipse.core.databinding.observable.Realm.runWithDefault（Realm.java:336）在org.eclipse.ui.internal.Workbench.createAndRunWorkbench（Workbench.java:594）在org.eclipse.ui.PlatformUI.createAndRunWorkbench（PlatformUI.java:148）在org.jkiss.dbeaver.core.application.DBeaverApplication.start（DBeaverApplication.java:160）在org.eclipse.equinox.internal.app.EclipseAppHandle.run（EclipseAppHandle.java:196）在org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication（EclipseAppLauncher.java:134）在org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start（EclipseAppLauncher.java:104）在org.eclipse.core.runtime.adaptor.EclipseStarter.run（EclipseStarter.java:388）在org.eclipse.core.runtime.adaptor.EclipseStarter.run（EclipseStarter.java:243） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method） at sun.reflect.NativeMethodAccessorImpl.invoke（Unknown Source） at sun.reflect.DelegatingMethodAccessorImpl.invoke（Unknown Source） at java.lang.reflect.Method.invoke（Unknown Source）在org.eclipse.equinox.launcher.Main.invokeFramework（Main.java:653）在org.eclipse.equinox.launcher.Main.basicRun（Main.java:590）在org.eclipse.equinox.launcher.Main.run（Main.java:1499）在org.eclipse.equinox.launcher.Main.main（Main.java:1472）

Answer 1

对于可编辑的ComboBoxCellEditor，我们可以使用新的ComboBoxCellEditor扩展旧的doSetValue()，并覆盖其doGetValue()方法和ComboBoxCellEditor方法。这可以使protected void doSetValue(final Object value) { if (value instanceof String) { ((CCombo) getControl()).setText((String) value); } else { super.doSetValue(value); } } @Override protected Object doGetValue() { final Object value = super.doGetValue(); if (value instanceof Integer && (Integer) value == -1) { return ((CCombo) getControl()).getText(); } return value; }可编辑。

$("div").on("mouseup",function(){

  var that = $(this)[0];
  
  // Get the position
  var pos = getCaretPosition(that);
  //console.log(pos);

  var otherDiv;
  if($(this).attr("id")=="t1"){
    otherDiv = $("#t2")[0];
  }else{
    otherDiv = $("#t1")[0];
  }

  // Set the position
  otherDiv.focus();
  setCaretPosition(otherDiv,pos);
});

// From https://stackoverflow.com/a/6249440/2159528
function setCaretPosition(editableDiv,pos){
  var range = document.createRange();
  var sel = window.getSelection();
  range.setStart(editableDiv.childNodes[0], pos);
  range.collapse(true);
  sel.removeAllRanges();
  sel.addRange(range);
}

// From https://stackoverflow.com/a/3976125/2159528
function getCaretPosition(editableDiv) {
  var caretPos = 0,
      sel, range;
  if (window.getSelection) {
    sel = window.getSelection();
    if (sel.rangeCount) {
      range = sel.getRangeAt(0);
      if (range.commonAncestorContainer.parentNode == editableDiv) {
        caretPos = range.endOffset;
      }
    }
  } else if (document.selection && document.selection.createRange) {
    range = document.selection.createRange();
    if (range.parentElement() == editableDiv) {
      var tempEl = document.createElement("span");
      editableDiv.insertBefore(tempEl, editableDiv.firstChild);
      var tempRange = range.duplicate();
      tempRange.moveToElementText(tempEl);
      tempRange.setEndPoint("EndToEnd", range);
      caretPos = tempRange.text.length;
    }
  }
  return caretPos;
}

Answer 2

ComboBoxCellEditor本身是可编辑的，因为它使用的是JFace Combo（完全是CCombo）。人们可以轻松覆盖所选文本。在这种情况下，setValue会将-1作为value返回（在OP的代码userInputValue中）。

所以要获得一个可编辑的ComboBoxCellEditor就足以在setValue - 方法中处理这个值：

@Override
protected void setValue(Object element, Object value) {
    if ((int)value == -1) {
        str[1] = ((CCombo)editor.getControl()).getText();
    } else {
        str[1] = names[(int)value];
    }
    viewer.update(element, null);
}

在EditingSupport

2 个答案: