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我正在实现一个 JFace TableViewer，其中一些列是ComboBoxViewerCellEditor.

我正在设置ColumnLabelProvider每一列，除了带有组合框的列之外，我也在设置EditingSupport。

containsEditingSupport也封装LabelProvider在ComboBoxViewerCellEditor.

所有的实现都基于 JFace MVC——即没有实现事件监听器的查看器和提供者。

行为如下：

  1. 启动表显示的值确定 - 即列标签提供程序提供正确的数据。
  2. 在列中启动组合框下拉列表中的值显示正常，选择值工作正常 - 即组合框显示新值和数据模型更改为新值
  3. 离开组合框时，组合框中显示的值（标签）返回列标签提供程序提供的值（在＃1中）。

似乎我不应该同时使用两个标签提供程序，或者以某种方式刷新列标签提供程序中的数据。

我正在附上我的代码，请查看columnViewerTargetObjectModelAttr同时具有ColumnLabelProvider和的 columnViewer EditingSupport。

我将不胜感激任何建议，谢谢。亚龙。

import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.ComboBoxViewerCellEditor;
import org.eclipse.jface.viewers.EditingSupport;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CCombo;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Table;

import myPackage.DataObjectAssociation;
import myPackage.DataObjectAssociations;
import myPackage.DataObjectAttribute;
import myPackage.DataObjectAttributeUI;
import myPackage.DataObjectUI;

public class ObjectModelAssociationPageMVC extends
        ObjectModaelGenerationWizardPage {
    private TableViewer omTableViewer;
    private TableViewer assocTableViewer;
    private Composite container;

    public ObjectModelAssociationPageMVC(ISelection selection,
            HanaServicesAdapter hanaServicesAdapter) {
        super("wizardPage", selection, hanaServicesAdapter);
        setTitle("Generate Object Model");
        setDescription("This wizard generates object models based on selected tables and     views");
        this.hanaServicesAdapter = hanaServicesAdapter;
    }

    @Override
    public void createControl(Composite parent) {

        // main container
        this.container = new Composite(parent, SWT.NULL);
        GridLayout layout = new GridLayout(1, true);
        container.setLayout(layout);

        // om container
        Composite omContainer = new Composite(container, SWT.NULL);
        omContainer.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false,
                1, 1));
        GridLayout omLayout = new GridLayout(1, true);
        omContainer.setLayout(omLayout);

        // ----- Objects List Label ------
        Label objectModelLabel = new Label(omContainer, SWT.NULL);
        objectModelLabel.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true,
                false, 1, 1));
        objectModelLabel.setText("Create Object Models Association:");

        // ----- Objects List ------
        omTableViewer = new TableViewer(omContainer, SWT.BORDER | SWT.SELECTED);
        omTableViewer.setContentProvider(new ArrayContentProvider());
        omTableViewer
            .addSelectionChangedListener(new     ObjectModelTableViewerSelectionListener());

        Table omTable = omTableViewer.getTable();
        omTable.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false, 1,
                1));
        omTable.setLinesVisible(true);
        omTable.setHeaderVisible(true);
        GridData omTableGridData = new GridData(SWT.FILL, SWT.FILL, true,
                false, 1, 1);
        omTableGridData.heightHint = omTable.getItemHeight() * 10
                + omTable.getHeaderHeight();
        omTable.setLayoutData(omTableGridData);
        // Column Object Name
        TableViewerColumn col = new TableViewerColumn(omTableViewer, SWT.NONE);
        col.getColumn().setText("Object Model Name");
        col.getColumn().setWidth(200);
        col.setLabelProvider(new ObjectModelNameColumnLabelProvider());

        // Associations List Container
        Composite assocContainer = new Composite(container, SWT.NULL);
    assocContainer.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true,
            false, 1, 1));
    GridLayout assocLayout = new GridLayout(2, false);
    assocContainer.setLayout(assocLayout);

        // ----- Associations List Label ------
        Label assocLabel = new Label(assocContainer, SWT.NULL);
        assocLabel.setText("Associations:");
        assocLabel.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false,
                2, 1));

        // Associations Table Container
        Composite assocTableContainer = new Composite(assocContainer, SWT.NULL);
        assocTableContainer.setLayoutData(new GridData(SWT.FILL, SWT.FILL,
                true, false, 1, 1));
        GridLayout assocTableLayout = new GridLayout(1, true);
        assocTableContainer.setLayout(assocTableLayout);

        // Associations add/remove buttons container
        Composite assocButtonsContainer = new Composite(assocContainer,
                SWT.NULL);
        assocButtonsContainer.setLayoutData(new GridData(SWT.FILL, SWT.FILL,
                true, false, 1, 1));
        GridLayout assocButtonsLayout = new GridLayout(1, true);
        assocButtonsContainer.setLayout(assocButtonsLayout);

        // ----- Associations List ------
        assocTableViewer = new TableViewer(assocTableContainer, SWT.BORDER
                | SWT.MULTI | SWT.FULL_SELECTION);
        assocTableViewer.setContentProvider(new ArrayContentProvider());
        Table assocTable = assocTableViewer.getTable();
        GridData assocTableGridData = new GridData(SWT.FILL, SWT.FILL, true,
                false, 1, 1);
    assocTableGridData.heightHint = assocTable.getItemHeight() * 10
            + assocTable.getHeaderHeight();
    assocTable.setLayoutData(assocTableGridData);
    assocTable.setLinesVisible(false);
    assocTable.setHeaderVisible(true);

        TableViewerColumn columnViewerAssocName = new TableViewerColumn(
                assocTableViewer, SWT.NONE);
        columnViewerAssocName.getColumn().setText("Association Name");
        columnViewerAssocName
                .setLabelProvider(new AssociationNameColumnLabelProvider());
        columnViewerAssocName.getColumn().pack();

        TableViewerColumn columnViewerSourceObjectModelAttr = new TableViewerColumn(
                assocTableViewer, SWT.NONE);
        columnViewerSourceObjectModelAttr.getColumn().setText(
                "Source Object Model Attribute");
        columnViewerSourceObjectModelAttr
                .setLabelProvider(new SourceObjectModelAttributeNameColumnLabelProvider());
        columnViewerSourceObjectModelAttr.getColumn().pack();

        TableViewerColumn columnViewerTargetObjectModel = new TableViewerColumn(
                assocTableViewer, SWT.NONE);
        columnViewerTargetObjectModel.getColumn()
                .setText("Target Object Model");
        columnViewerTargetObjectModel
                .setLabelProvider(new TargetObjectModelNameColumnLabelProvider());

        EditingSupport targetObjectModelColumnEditingSupport = new     TargetObjectModelColumnEditingSupport(
                columnViewerTargetObjectModel.getViewer());
        columnViewerTargetObjectModel
            .setEditingSupport(targetObjectModelColumnEditingSupport);

    columnViewerTargetObjectModel.getColumn().pack();

    TableViewerColumn columnViewerTargetObjectModelAttr = new TableViewerColumn(
            assocTableViewer, SWT.NONE);
    columnViewerTargetObjectModelAttr.getColumn().setText(
            "Target Object Model Attribute");
    columnViewerTargetObjectModelAttr
            .setLabelProvider(new TargetObjectModelAttributeNameColumnLabelProvider());
    EditingSupport targetObjectModelAttributeColumnEditingSupport = new TargetObjectModelAttributeColumnEditingSupport(
            columnViewerTargetObjectModel.getViewer());
    columnViewerTargetObjectModelAttr
            .setEditingSupport(targetObjectModelAttributeColumnEditingSupport);
    columnViewerTargetObjectModelAttr.getColumn().pack();

    TableViewerColumn columnViewerAssocCardinality = new TableViewerColumn(
            assocTableViewer, SWT.NONE);
    columnViewerAssocCardinality.getColumn().setText("Cardinality");
    columnViewerAssocCardinality
            .setLabelProvider(new CardinalityColumnLabelProvider());
    columnViewerAssocCardinality.getColumn().pack();

    assocTable.pack();

    // ----- Associations List Buttons ------
    Button addAssocButton = new Button(assocButtonsContainer, SWT.PUSH);
    addAssocButton.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false,
            false, 1, 1));
    addAssocButton.setText("Add");
    Button removeAssocButton = new Button(assocButtonsContainer, SWT.PUSH);
    removeAssocButton.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false,
            false, 1, 1));
    removeAssocButton.setText("Remove");

    // ------------ Create Objects ------------------
    setControl(container);
}

class ObjectModelTableViewerSelectionListener implements
        ISelectionChangedListener {
    @Override
    public void selectionChanged(SelectionChangedEvent event) {
        IStructuredSelection selection;
        DataObjectUI dataObjectUI;
        DataObjectAssociations dataObjectAssociations;
        DataObjectAssociation[] dataObjectAssociation = null;
        selection = (IStructuredSelection) omTableViewer.getSelection();
        dataObjectUI = (DataObjectUI) selection.getFirstElement();
        dataObjectAssociations = dataObjectUI.getAssociations();
        if (dataObjectAssociations != null) {
            List<DataObjectAssociation> list = dataObjectAssociations
                    .getAssociation();
            dataObjectAssociation = list
                    .toArray(new DataObjectAssociation[list.size()]);
        }
        assocTableViewer.setInput(dataObjectAssociation);
        // cellEditor.setInput(hanaServicesAdapter.getSelectedTablesViews()
        // .toArray());
    }
}

@Override
public void setVisible(boolean visible) {
    super.setVisible(visible);
    if (visible) {
        omTableViewer.setContentProvider(new ArrayContentProvider());
        omTableViewer.setInput(hanaServicesAdapter.getSelectedTablesViews()
                .toArray());

    }
}

class ObjectModelNameColumnLabelProvider extends ColumnLabelProvider {
    @Override
    public String getText(Object element) {
        DataObjectUI dataObjectUI = (DataObjectUI) element;
        return dataObjectUI.getFileName();
    }
}

class AssociationNameColumnLabelProvider extends ColumnLabelProvider {
    @Override
    public String getText(Object element) {
        DataObjectAssociation dataObjectAssociation = (DataObjectAssociation) element;
        return dataObjectAssociation.getName();
    }
}

class TargetObjectModelNameColumnLabelProvider extends ColumnLabelProvider {
    @Override
    public String getText(Object element) {
        DataObjectAssociation dataObjectAssociation = (DataObjectAssociation) element;
        return dataObjectAssociation.getTarget();
    }
}

class TargetObjectModelAttributeNameColumnLabelProvider extends
        ColumnLabelProvider {
    @Override
    public String getText(Object element) {
        DataObjectAssociation dataObjectAssociation = (DataObjectAssociation) element;
        return dataObjectAssociation.getTargetAttribute();
    }
}

class SourceObjectModelAttributeNameColumnLabelProvider extends
        ColumnLabelProvider {
    @Override
    public String getText(Object element) {
        DataObjectAssociation dataObjectAssociation = (DataObjectAssociation) element;
        return dataObjectAssociation.getSourceAttribute();              
    }
}

class CardinalityColumnLabelProvider extends ColumnLabelProvider {
    @Override
    public String getText(Object element) {
        DataObjectAssociation dataObjectAssociation = (DataObjectAssociation) element;
        return dataObjectAssociation.getCardinality().toString();
    }
}

public final class TargetObjectModelColumnEditingSupport extends
        EditingSupport {
    private ComboBoxViewerCellEditor cellEditor;

    private TargetObjectModelColumnEditingSupport(ColumnViewer viewer) {
        super(viewer);
    }

    @Override
    protected CellEditor getCellEditor(Object element) {
        cellEditor = new ComboBoxViewerCellEditor((Composite) getViewer()
                .getControl(), SWT.READ_ONLY);
        cellEditor.setLabelProvider(new LabelProvider() {
            public String getText(Object element) {
                return ((DataObjectUI) element).getFileName();
            }
        });
        cellEditor.setContentProvider(new ArrayContentProvider());
        String target = ((DataObjectAssociation) element).getTarget();
        CCombo combo = cellEditor.getViewer().getCCombo();
        // combo.select(combo.indexOf(target));
        combo.setText(target);
        cellEditor.setInput(hanaServicesAdapter.getSelectedTablesViews()
                .toArray());
        return cellEditor;
    }

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

    @Override
    protected Object getValue(Object element) {
        if (element instanceof DataObjectAssociation) {
            DataObjectAssociation data = (DataObjectAssociation) element;
            return data.getTarget();
        }
        return null;
    }

    @Override
    protected void setValue(Object element, Object value) {
        if (element instanceof DataObjectAssociation
                && value instanceof DataObjectUI) {
            DataObjectAssociation data = (DataObjectAssociation) element;
            String newValue = ((DataObjectUI) value).getFileName();
            /* only set new value if it differs from old one */
            if (!data.getTarget().equals(newValue)) {
                data.setTarget(newValue);
            }
        }
    }

}

public final class TargetObjectModelAttributeColumnEditingSupport extends
        EditingSupport {
    private ComboBoxViewerCellEditor cellEditor;

    private TargetObjectModelAttributeColumnEditingSupport(
            ColumnViewer viewer) {
        super(viewer);
    }

    @Override
    protected CellEditor getCellEditor(Object element) {
        cellEditor = new ComboBoxViewerCellEditor((Composite) getViewer()
                .getControl(), SWT.READ_ONLY);
        cellEditor.setLabelProvider(new LabelProvider() {
            public String getText(Object element) {
                return ((DataObjectAttributeUI) element).getName();
            }
        });
        cellEditor.setContentProvider(new ArrayContentProvider());

        CCombo combo = cellEditor.getViewer().getCCombo();

        // String targetObjectModel = targetObjectCombo.getText();

        DataObjectUI dataObjectUI = hanaServicesAdapter
                .getDataObjectUI(((DataObjectAssociation) element)
                        .getTarget());
        cellEditor.setInput(dataObjectUI.getSelectedAttributesUI()
                .toArray());
        String attribute = ((DataObjectAssociation) element)
                .getTargetAttribute();
        combo.setText(attribute);
        return cellEditor;
    }

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

    @Override
    protected Object getValue(Object element) {
        if (element instanceof DataObjectAssociation) {
            DataObjectAssociation data = (DataObjectAssociation) element;
            return data.getTargetAttribute();
        }
        return null;
    }

    @Override
    protected void setValue(Object element, Object value) {
        if (element instanceof DataObjectAssociation
                && value instanceof DataObjectAttributeUI) {
            DataObjectAssociation data = (DataObjectAssociation) element;
            String newValue = ((DataObjectAttributeUI) value).getName();
            /* only set new value if it differs from old one */
            if (!data.getTargetAttribute().equals(newValue)) {
                data.setTargetAttribute(newValue);
            }
        }
    }

}
}
4

1 回答 1

0

您可能想尝试更新 setValue()。

    if (!data.getTargetAttribute().equals(newValue)) {
        data.setTargetAttribute(newValue);
        update(element, null);
    }
于 2015-02-19T10:41:08.970 回答