显示NatTable上下文菜单 [英] Showing NatTable context menu

问题描述

我使用NatTable.如何根据单元格的内容在特定条件下显示上下文菜单项?以及如何选择调用了上下文菜单的单元格?我将菜单与以下代码绑定

I use NatTable. How to show context menu item on certain condition depending on the content of the cell? And how to select cell over which context menu was called? I bind menu with the following code

uiBindingRegistry.registerMouseDownBinding(
            new MouseEventMatcher(SWT.NONE, null, MouseEventMatcher.RIGHT_BUTTON), new PopupMenuAction(menu));

UPD: 我创建这样的菜单，但是尽管isActive仍然显示'Test'项目，但始终返回false.怎么了?

UPD: I create menu like this, but 'Test' item is visible in spite of isActive always return false. What's wrong with it?

menu = new PopupMenuBuilder(natTable).withMenuItemProvider(ITEM_ID, new IMenuItemProvider() {
        @Override
        public void addMenuItem(final NatTable natTable, final Menu popupMenu) {
            final MenuItem menuItem = new MenuItem(popupMenu, SWT.PUSH);
            menuItem.setText("Test");
            menuItem.setEnabled(true);
            menuItem.addSelectionListener(new SelectionAdapter() {
                @Override
                public void widgetSelected(final SelectionEvent event) {
                    System.out.println("test");
                }
            });
        }
    }).withVisibleState(ITEM_ID, new IMenuItemState() {
        @Override
        public boolean isActive(final NatEventData natEventData) {
            return false;
        }
    }).build();

推荐答案

给出的答案是正确的.虽然可以改善.您不需要SelectionLayer.

The given answer is correct. Although it can be improved. You don't need the SelectionLayer.

class CellPopupMenuAction implements IMouseAction {

    private final Menu menu;

    public CellPopupMenuAction(Menu menu) {
        this.menu = menu;
    }

    @Override
    public void run(NatTable natTable, MouseEvent event) {
        int columnPosition = natTable.getColumnPositionByX(event.x);
        int rowPosition = natTable.getRowPositionByY(event.y);

        ILayerCell cell = natTable.getCellByPosition(columnPosition, rowPosition);

        if (!cell.getDisplayMode().equals(DisplayMode.SELECT)) {
            natTable.doCommand(
                    new SelectCellCommand(
                            natTable,
                            columnPosition,
                            rowPosition,
                            false,
                            false));
        }

        menu.setData(MenuItemProviders.NAT_EVENT_DATA_KEY, event.data);
        menu.setVisible(true);
    }
}

这样，您完全不需要引用SelectionLayer，甚至可以改善功能，因为如果右键单击选定的单元格，则永远不会触发SelectCellCommand.

This way you completely remove the need to reference the SelectionLayer and even improve the functionality because the SelectCellCommand is never fired if you right click on a selected cell.

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