如何更改 ContentProposalAdapter 的外观

Question

我正在使用 ContentProposalAdapter 自动完成文本框，它工作正常，但我想更改其外观，例如弹出窗口的字体或背景颜色等，我搜索了但找不到任何 ContentProposalAdapter 的方法来执行这些操作。如何更改 ContentProposalAdapter 的外观？

Answer 1

我对这个 jface 部分没有任何经验，但是当您检查文档时，您可以找到方法 openProposalPopup (参见文档)

此类提供一些可重写的方法允许客户端手动控制弹出窗口。但是，大多数实现仍然是私有的。

打开提案弹出窗口并显示提案提供者提供的提案。该方法立即返回。也就是说，它不会等待提案被选择。子类使用此方法显式调用弹出窗口的打开。如果没有要显示的提案，则不会打开弹出窗口，并且会发出蜂鸣声。

如果您检查此方法的代码，您会发现

/**
 * Open the proposal popup and display the proposals provided by the
 * proposal provider. If there are no proposals to be shown, do not show the
 * popup. This method returns immediately. That is, it does not wait for the
 * popup to open or a proposal to be selected.
 * 
 * @param autoActivated
 *            a boolean indicating whether the popup was autoactivated. If
 *            false, a beep will sound when no proposals can be shown.
 */
private void openProposalPopup(boolean autoActivated) {
    if (isValid()) {
        if (popup == null) {
            // Check whether there are any proposals to be shown.
            recordCursorPosition(); // must be done before getting proposals
            IContentProposal[] proposals = getProposals();
            if (proposals.length > 0) {
                if (DEBUG) {
                    System.out.println("POPUP OPENED BY PRECEDING EVENT"); //$NON-NLS-1$
                }
                recordCursorPosition();
                popup = new ContentProposalPopup(null, proposals);
                popup.open();
                popup.getShell().addDisposeListener(new DisposeListener() {
                    public void widgetDisposed(DisposeEvent event) {
                        popup = null;
                    }
                });
                internalPopupOpened();
                notifyPopupOpened();
            } else if (!autoActivated) {
                getControl().getDisplay().beep();
            }
        }
    }
}

/**
 * Open the proposal popup and display the proposals provided by the
 * proposal provider. This method returns immediately. That is, it does not
 * wait for a proposal to be selected. This method is used by subclasses to
 * explicitly invoke the opening of the popup. If there are no proposals to
 * show, the popup will not open and a beep will be sounded.
 */
protected void openProposalPopup() {
    openProposalPopup(false);
}

该代码创建了 ContentProposalPopup 实例，该实例管理弹出窗口小部件的外观和其他一些东西（查看源代码整个 ContentProposalAdapeter 类）。

因此，如果您创建新类来重写 openProposalPopup() 并使用您自己的 ContentProposalPopup，您可以根据需要管理外观。

Answer 2

我们也遇到了 ContentProposalAdapter 的问题，最终复制粘贴它，然后根据我们的需要进行修改。