eclipse rcp：如何在tableviewer中选择单个单元格？

Question

我可以更改表格的默认选择行为，我想在用户点击它时选择一个单元格，并在用户双击它时使其可编辑。

在@nonty的帮助下，我得到了我想要的东西
这是我的手机荧光笔实现：

package com.amarsoft.rcputil;

import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.FocusCellOwnerDrawHighlighter;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;


public class DefaultCellFocusHighlighter extends FocusCellOwnerDrawHighlighter {

    public DefaultCellFocusHighlighter(ColumnViewer viewer) {
        super(viewer);
    }

    protected boolean onlyTextHighlighting(ViewerCell cell) {
        return false;
    }

    protected Color getSelectedCellBackgroundColor(ViewerCell cell) {
        return cell.getControl().getDisplay().getSystemColor(SWT.COLOR_DARK_BLUE);
    }

    protected Color getSelectedCellForegroundColor(ViewerCell cell) {
        return cell.getControl().getDisplay().getSystemColor(SWT.COLOR_WHITE);
    }

    protected Color getSelectedCellForegroundColorNoFocus(ViewerCell cell) {
        return cell.getControl().getDisplay().getSystemColor(SWT.COLOR_WHITE);
    }

    protected Color getSelectedCellBackgroundColorNoFocus(ViewerCell cell) {
        return cell.getControl().getDisplay().getSystemColor(SWT.COLOR_DARK_BLUE);
    }

    protected void focusCellChanged(ViewerCell newCell, ViewerCell oldCell) {
        super.focusCellChanged(newCell, oldCell);
    }



}

使用它的代码：

TableViewerFocusCellManager focusCellManager = new TableViewerFocusCellManager(tv,new DefaultCellFocusHighlighter(tv));
        ColumnViewerEditorActivationStrategy actSupport = new ColumnViewerEditorActivationStrategy(tv) {
            protected boolean isEditorActivationEvent(ColumnViewerEditorActivationEvent event) {
                return event.eventType == ColumnViewerEditorActivationEvent.TRAVERSAL
                        || event.eventType == ColumnViewerEditorActivationEvent.MOUSE_DOUBLE_CLICK_SELECTION
                        || (event.eventType == ColumnViewerEditorActivationEvent.KEY_PRESSED && event.keyCode == SWT.CR)
                        || event.eventType == ColumnViewerEditorActivationEvent.PROGRAMMATIC;
            }
        };

        TableViewerEditor.create(tv, focusCellManager, actSupport, ColumnViewerEditor.TABBING_HORIZONTAL
                | ColumnViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR
                | ColumnViewerEditor.TABBING_VERTICAL | ColumnViewerEditor.KEYBOARD_ACTIVATION);

但我遇到了新问题：
当我双击单元格来编辑它的值时，单元格左侧有一个小区域仍然以深蓝色突出显示

我知道原因：
使用边框创建文本控件时，操作系统包含围绕控件内容的特定平台。
还在寻找修复......

Answer 1

看看这两个JFace Snippets：

• Snippet036FocusBorderCellHighlighter - 通过突出显示当前所选单元格并使用焦点边框再次显示新单元格导航支持的灵活性来演示键盘导航
• Snippet034CellEditorPerRowNewAPI - 使用JFace-Viewers的3.3-API在一个COLUMN中演示不同的CellEditor类型

Answer 2

在深入研究代码后，我在ColumnViewer类中找到了以下方法：

/**
 * Hook up the editing support. Subclasses may override.
 * 
 * @param control
 *      the control you want to hook on
 */
protected void hookEditingSupport(Control control) {
    // Needed for backwards comp with AbstractTreeViewer and TableTreeViewer
    // who are not hooked this way others may already overwrite and provide
    // their
    // own impl
    if (viewerEditor != null) {
        control.addMouseListener(new MouseAdapter() {
            public void mouseDown(MouseEvent e) {
                // Workaround for bug 185817
                if (e.count != 2) {
                    handleMouseDown(e);
                }
            }

            public void mouseDoubleClick(MouseEvent e) {
                handleMouseDown(e);
            }
        });
    }
}

所以，我在我的TableViewer子类中覆盖了该函数：

@Override protected void hookEditingSupport(Control control) {
    // We know there should be an editor avaiable
//  if (viewerEditor != null) {
        control.addMouseListener(new MouseAdapter() {
            public void mouseDown(MouseEvent e) {
                // Workaround for bug 185817
                if (e.count != 2) {
                    // We don't want to edit on single clicks
//                  handleMouseDown(e);
                }
            }

            public void mouseDoubleClick(MouseEvent e) {
                // This method is private, so copy the implementation
//              handleMouseDown(e);
                ViewerCell cell = getCell(new Point(e.x, e.y));
                e.count--; // A hack to make things work - pretend like it's a single click
                if (cell != null) {
                    triggerEditorActivationEvent(new ColumnViewerEditorActivationEvent(
                            cell, e));
                }
            }
        });
//  }
}

这对我有用。告诉我它是否适合你。