在EditingSupport中编辑ComboBoxCellEditor-Java 学习之路

如果用户选择 " " 项目，我想使 ComboBoxCellEditor 可编辑 . 我试着用两个 CellEditor ，一个是 TextCellEditor ，一个是 ComboBoxCellEditor . 如果用户选择 " " item， CellEditor 将切换到 TextCellEditor . 但它不起作用 . 因为 comboIndex 有 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）位于org.eclipse.jface上的org.eclipse.jers.view.ColumnView.handleMouseDown（ColumnViewer.java:652）的org.eclipse.jface.viewers.ColumnViewer.triggerEditorActivationEvent（ColumnViewer.java:677） .viewers.ColumnViewer.access $ 0（ColumnViewer.java:648）atg.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）at Org.eclipse.swt.wts.wtis.Andplay.sendEvent(dob.::::: or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or or Display.java:4238）org.eclipse.wt.jidget.Display.readAndDispatch（Display.java:3817）位于org.eclipse.jface的org.eclipse.jface.window.Window.runEventLoop（Window.java:818） .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）org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection（ActionContributionItem.java:565）org.eclipse.jface.action.ActionContributionItem.lambda $ 4（ActionContrib） utionItem.java:397）org.eclipse.jface.action.ActionContributionItem $$ Lambda $ 148 / 1073564434.handleEvent（未知来源）org.eclipse.swt.widgets.EventTable.sendEvent（EventTable.java:86）at org . eclipse.swt.widgets.Display.sendEvent（Display.java:4428）atg.eclipse.swt.widgets.Widget.sendEvent（Widget.java:1079）org.eclipse.swt.widgets.Display.runDeferredEvents（显示 . java：4238）org.eclipse.swt.widgets.Display.readAndDispatch（Display.java:3817）at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine $ 5.run（PartRenderingEngine.java:1155）at at Org.eclipse.core.databinding.observable.Realm.runWithDefault（Realm.java:336）位于org.eclipse的org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run（PartRenderingEngine.java:1044） . e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153）org.eclipse.ui.internal.Workbench.lambda $ 3（Workbench.java:680）org.eclipse.ui.internal.Workbench $$ lambda $ 14 / 1717433286.run（未知来源）org.eclipse.core.databind ing.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.eclipse.core.run上的org.eclipse.equinox.internal.app.EclipseAppHandle.run（EclipseAppHandle.java:196）的org.jkiss.dbeaver.core.application.DBeaverApplication.start(DBeaverApplication.java:160） .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）atg.eclipse.core.runtime.adaptor.EclipseStarter.run（EclipseStarter.java:243）at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke来自org.ecl的java.lang.reflect.Method.invoke（未知来源）的sun.reflect.DelegatingMethodAccessorImpl.invoke（未知来源）的（未知来源）位于org.eclipse.equinox.launcher.Main.basicRun（Main.java:590）的org.eclipse.equinox.launcher.Main.run上的ipse.equinox.launcher.Main.invokeFramework（Main.java:653） java：1499）org.eclipse.equinox.launcher.Main.main（Main.java:1472）

2 回答

对于可编辑的 ComboBoxCellEditor ，我们可以使用新的 ComboBoxCellEditor 扩展旧的，并覆盖其 doSetValue() 方法和 doGetValue() 方法 . 这可以使 ComboBoxCellEditor 可编辑 .

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;
}

回复于 2024-04-29T05:59:21+08:00

0
ComboBoxCellEditor 本身是可编辑的，因为它使用 JFace Combo （完全是 CCombo ） . 可以轻松覆盖所选文本 . 在这种情况下， setValue 返回 -1 为 value （在OP的代码 userInputValue 中） .

因此，要获得可编辑的 ComboBoxCellEditor 就足以在 setValue -method中处理此值：
```
@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);
}
```
回复于 2024-04-29T05:59:21+08:00

在EditingSupport中编辑ComboBoxCellEditor

2 回答

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